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Diffstat (limited to 'mesalib/src/mesa/main/image.c')
-rw-r--r--mesalib/src/mesa/main/image.c7947
1 files changed, 1874 insertions, 6073 deletions
diff --git a/mesalib/src/mesa/main/image.c b/mesalib/src/mesa/main/image.c
index 86aa6d0d7..08d25c8d1 100644
--- a/mesalib/src/mesa/main/image.c
+++ b/mesalib/src/mesa/main/image.c
@@ -1,6073 +1,1874 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.5
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \file image.c
- * Image handling.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "enums.h"
-#include "image.h"
-#include "imports.h"
-#include "macros.h"
-
-
-/**
- * NOTE:
- * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when
- * we later convert the float to a packed integer value (such as for
- * GL_RGB5_A1) because we'll wind up with a non-zero value.
- *
- * We redefine the macros here so zero is handled correctly.
- */
-#undef BYTE_TO_FLOAT
-#define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
-
-#undef SHORT_TO_FLOAT
-#define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
-
-
-
-/** Compute ceiling of integer quotient of A divided by B. */
-#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
-/**
- * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
- */
-GLboolean
-_mesa_type_is_packed(GLenum type)
-{
- switch (type) {
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- case GL_UNSIGNED_SHORT_8_8_MESA:
- case GL_UNSIGNED_SHORT_8_8_REV_MESA:
- case GL_UNSIGNED_INT_24_8_EXT:
- return GL_TRUE;
- }
-
- return GL_FALSE;
-}
-
-/**
- * Flip the 8 bits in each byte of the given array.
- *
- * \param p array.
- * \param n number of bytes.
- *
- * \todo try this trick to flip bytes someday:
- * \code
- * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
- * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
- * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
- * \endcode
- */
-static void
-flip_bytes( GLubyte *p, GLuint n )
-{
- GLuint i, a, b;
- for (i = 0; i < n; i++) {
- b = (GLuint) p[i]; /* words are often faster than bytes */
- a = ((b & 0x01) << 7) |
- ((b & 0x02) << 5) |
- ((b & 0x04) << 3) |
- ((b & 0x08) << 1) |
- ((b & 0x10) >> 1) |
- ((b & 0x20) >> 3) |
- ((b & 0x40) >> 5) |
- ((b & 0x80) >> 7);
- p[i] = (GLubyte) a;
- }
-}
-
-
-/**
- * Flip the order of the 2 bytes in each word in the given array.
- *
- * \param p array.
- * \param n number of words.
- */
-void
-_mesa_swap2( GLushort *p, GLuint n )
-{
- GLuint i;
- for (i = 0; i < n; i++) {
- p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
- }
-}
-
-
-
-/*
- * Flip the order of the 4 bytes in each word in the given array.
- */
-void
-_mesa_swap4( GLuint *p, GLuint n )
-{
- GLuint i, a, b;
- for (i = 0; i < n; i++) {
- b = p[i];
- a = (b >> 24)
- | ((b >> 8) & 0xff00)
- | ((b << 8) & 0xff0000)
- | ((b << 24) & 0xff000000);
- p[i] = a;
- }
-}
-
-
-/**
- * Get the size of a GL data type.
- *
- * \param type GL data type.
- *
- * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
- * if an invalid type enum.
- */
-GLint
-_mesa_sizeof_type( GLenum type )
-{
- switch (type) {
- case GL_BITMAP:
- return 0;
- case GL_UNSIGNED_BYTE:
- return sizeof(GLubyte);
- case GL_BYTE:
- return sizeof(GLbyte);
- case GL_UNSIGNED_SHORT:
- return sizeof(GLushort);
- case GL_SHORT:
- return sizeof(GLshort);
- case GL_UNSIGNED_INT:
- return sizeof(GLuint);
- case GL_INT:
- return sizeof(GLint);
- case GL_FLOAT:
- return sizeof(GLfloat);
- case GL_DOUBLE:
- return sizeof(GLdouble);
- case GL_HALF_FLOAT_ARB:
- return sizeof(GLhalfARB);
- default:
- return -1;
- }
-}
-
-
-/**
- * Same as _mesa_sizeof_type() but also accepting the packed pixel
- * format data types.
- */
-GLint
-_mesa_sizeof_packed_type( GLenum type )
-{
- switch (type) {
- case GL_BITMAP:
- return 0;
- case GL_UNSIGNED_BYTE:
- return sizeof(GLubyte);
- case GL_BYTE:
- return sizeof(GLbyte);
- case GL_UNSIGNED_SHORT:
- return sizeof(GLushort);
- case GL_SHORT:
- return sizeof(GLshort);
- case GL_UNSIGNED_INT:
- return sizeof(GLuint);
- case GL_INT:
- return sizeof(GLint);
- case GL_HALF_FLOAT_ARB:
- return sizeof(GLhalfARB);
- case GL_FLOAT:
- return sizeof(GLfloat);
- case GL_UNSIGNED_BYTE_3_3_2:
- return sizeof(GLubyte);
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- return sizeof(GLubyte);
- case GL_UNSIGNED_SHORT_5_6_5:
- return sizeof(GLushort);
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- return sizeof(GLushort);
- case GL_UNSIGNED_SHORT_4_4_4_4:
- return sizeof(GLushort);
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- return sizeof(GLushort);
- case GL_UNSIGNED_SHORT_5_5_5_1:
- return sizeof(GLushort);
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- return sizeof(GLushort);
- case GL_UNSIGNED_INT_8_8_8_8:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_10_10_10_2:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return sizeof(GLuint);
- case GL_UNSIGNED_SHORT_8_8_MESA:
- case GL_UNSIGNED_SHORT_8_8_REV_MESA:
- return sizeof(GLushort);
- case GL_UNSIGNED_INT_24_8_EXT:
- return sizeof(GLuint);
- default:
- return -1;
- }
-}
-
-
-/**
- * Get the number of components in a pixel format.
- *
- * \param format pixel format.
- *
- * \return the number of components in the given format, or -1 if a bad format.
- */
-GLint
-_mesa_components_in_format( GLenum format )
-{
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_COLOR_INDEX1_EXT:
- case GL_COLOR_INDEX2_EXT:
- case GL_COLOR_INDEX4_EXT:
- case GL_COLOR_INDEX8_EXT:
- case GL_COLOR_INDEX12_EXT:
- case GL_COLOR_INDEX16_EXT:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_RED_INTEGER_EXT:
- case GL_GREEN:
- case GL_GREEN_INTEGER_EXT:
- case GL_BLUE:
- case GL_BLUE_INTEGER_EXT:
- case GL_ALPHA:
- case GL_ALPHA_INTEGER_EXT:
- case GL_LUMINANCE:
- case GL_LUMINANCE_INTEGER_EXT:
- case GL_INTENSITY:
- return 1;
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE_ALPHA_INTEGER_EXT:
- return 2;
- case GL_RGB:
- case GL_RGB_INTEGER_EXT:
- return 3;
- case GL_RGBA:
- case GL_RGBA_INTEGER_EXT:
- return 4;
- case GL_BGR:
- return 3;
- case GL_BGRA:
- return 4;
- case GL_ABGR_EXT:
- return 4;
- case GL_YCBCR_MESA:
- return 2;
- case GL_DEPTH_STENCIL_EXT:
- return 2;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- return 2;
- default:
- return -1;
- }
-}
-
-
-/**
- * Get the bytes per pixel of pixel format type pair.
- *
- * \param format pixel format.
- * \param type pixel type.
- *
- * \return bytes per pixel, or -1 if a bad format or type was given.
- */
-GLint
-_mesa_bytes_per_pixel( GLenum format, GLenum type )
-{
- GLint comps = _mesa_components_in_format( format );
- if (comps < 0)
- return -1;
-
- switch (type) {
- case GL_BITMAP:
- return 0; /* special case */
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- return comps * sizeof(GLubyte);
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- return comps * sizeof(GLshort);
- case GL_INT:
- case GL_UNSIGNED_INT:
- return comps * sizeof(GLint);
- case GL_FLOAT:
- return comps * sizeof(GLfloat);
- case GL_HALF_FLOAT_ARB:
- return comps * sizeof(GLhalfARB);
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- if (format == GL_RGB || format == GL_BGR)
- return sizeof(GLubyte);
- else
- return -1; /* error */
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (format == GL_RGB || format == GL_BGR)
- return sizeof(GLushort);
- else
- return -1; /* error */
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
- return sizeof(GLushort);
- else
- return -1;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
- return sizeof(GLuint);
- else
- return -1;
- case GL_UNSIGNED_SHORT_8_8_MESA:
- case GL_UNSIGNED_SHORT_8_8_REV_MESA:
- if (format == GL_YCBCR_MESA)
- return sizeof(GLushort);
- else
- return -1;
- case GL_UNSIGNED_INT_24_8_EXT:
- if (format == GL_DEPTH_STENCIL_EXT)
- return sizeof(GLuint);
- else
- return -1;
- default:
- return -1;
- }
-}
-
-
-/**
- * Test for a legal pixel format and type.
- *
- * \param format pixel format.
- * \param type pixel type.
- *
- * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
- * otherwise.
- */
-GLboolean
-_mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type )
-{
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- switch (type) {
- case GL_BITMAP:
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- case GL_HALF_FLOAT_ARB:
- return ctx->Extensions.ARB_half_float_pixel;
- default:
- return GL_FALSE;
- }
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
-#if 0 /* not legal! see table 3.6 of the 1.5 spec */
- case GL_INTENSITY:
-#endif
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_DEPTH_COMPONENT:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- case GL_HALF_FLOAT_ARB:
- return ctx->Extensions.ARB_half_float_pixel;
- default:
- return GL_FALSE;
- }
- case GL_RGB:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- return GL_TRUE;
- case GL_HALF_FLOAT_ARB:
- return ctx->Extensions.ARB_half_float_pixel;
- default:
- return GL_FALSE;
- }
- case GL_BGR:
- switch (type) {
- /* NOTE: no packed types are supported with BGR. That's
- * intentional, according to the GL spec.
- */
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- case GL_HALF_FLOAT_ARB:
- return ctx->Extensions.ARB_half_float_pixel;
- default:
- return GL_FALSE;
- }
- case GL_RGBA:
- case GL_BGRA:
- case GL_ABGR_EXT:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return GL_TRUE;
- case GL_HALF_FLOAT_ARB:
- return ctx->Extensions.ARB_half_float_pixel;
- default:
- return GL_FALSE;
- }
- case GL_YCBCR_MESA:
- if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
- type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
- return GL_TRUE;
- else
- return GL_FALSE;
- case GL_DEPTH_STENCIL_EXT:
- if (ctx->Extensions.EXT_packed_depth_stencil
- && type == GL_UNSIGNED_INT_24_8_EXT)
- return GL_TRUE;
- else
- return GL_FALSE;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
- case GL_RED_INTEGER_EXT:
- case GL_GREEN_INTEGER_EXT:
- case GL_BLUE_INTEGER_EXT:
- case GL_ALPHA_INTEGER_EXT:
- case GL_RGB_INTEGER_EXT:
- case GL_RGBA_INTEGER_EXT:
- case GL_BGR_INTEGER_EXT:
- case GL_BGRA_INTEGER_EXT:
- case GL_LUMINANCE_INTEGER_EXT:
- case GL_LUMINANCE_ALPHA_INTEGER_EXT:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- return ctx->Extensions.EXT_texture_integer;
- default:
- return GL_FALSE;
- }
-
- default:
- ; /* fall-through */
- }
- return GL_FALSE;
-}
-
-
-/**
- * Test if the given image format is a color/RGBA format (i.e., not color
- * index, depth, stencil, etc).
- * \param format the image format value (may by an internal texture format)
- * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
- */
-GLboolean
-_mesa_is_color_format(GLenum format)
-{
- switch (format) {
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_ALPHA4:
- case GL_ALPHA8:
- case GL_ALPHA12:
- case GL_ALPHA16:
- case 1:
- case GL_LUMINANCE:
- case GL_LUMINANCE4:
- case GL_LUMINANCE8:
- case GL_LUMINANCE12:
- case GL_LUMINANCE16:
- case 2:
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE4_ALPHA4:
- case GL_LUMINANCE6_ALPHA2:
- case GL_LUMINANCE8_ALPHA8:
- case GL_LUMINANCE12_ALPHA4:
- case GL_LUMINANCE12_ALPHA12:
- case GL_LUMINANCE16_ALPHA16:
- case GL_INTENSITY:
- case GL_INTENSITY4:
- case GL_INTENSITY8:
- case GL_INTENSITY12:
- case GL_INTENSITY16:
- case 3:
- case GL_RGB:
- case GL_BGR:
- case GL_R3_G3_B2:
- case GL_RGB4:
- case GL_RGB5:
- case GL_RGB8:
- case GL_RGB10:
- case GL_RGB12:
- case GL_RGB16:
- case 4:
- case GL_ABGR_EXT:
- case GL_RGBA:
- case GL_BGRA:
- case GL_RGBA2:
- case GL_RGBA4:
- case GL_RGB5_A1:
- case GL_RGBA8:
- case GL_RGB10_A2:
- case GL_RGBA12:
- case GL_RGBA16:
- /* float texture formats */
- case GL_ALPHA16F_ARB:
- case GL_ALPHA32F_ARB:
- case GL_LUMINANCE16F_ARB:
- case GL_LUMINANCE32F_ARB:
- case GL_LUMINANCE_ALPHA16F_ARB:
- case GL_LUMINANCE_ALPHA32F_ARB:
- case GL_INTENSITY16F_ARB:
- case GL_INTENSITY32F_ARB:
- case GL_RGB16F_ARB:
- case GL_RGB32F_ARB:
- case GL_RGBA16F_ARB:
- case GL_RGBA32F_ARB:
- /* compressed formats */
- case GL_COMPRESSED_ALPHA:
- case GL_COMPRESSED_LUMINANCE:
- case GL_COMPRESSED_LUMINANCE_ALPHA:
- case GL_COMPRESSED_INTENSITY:
- case GL_COMPRESSED_RGB:
- case GL_COMPRESSED_RGBA:
- case GL_RGB_S3TC:
- case GL_RGB4_S3TC:
- case GL_RGBA_S3TC:
- case GL_RGBA4_S3TC:
- case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
- case GL_COMPRESSED_RGB_FXT1_3DFX:
- case GL_COMPRESSED_RGBA_FXT1_3DFX:
-#if FEATURE_EXT_texture_sRGB
- case GL_SRGB_EXT:
- case GL_SRGB8_EXT:
- case GL_SRGB_ALPHA_EXT:
- case GL_SRGB8_ALPHA8_EXT:
- case GL_SLUMINANCE_ALPHA_EXT:
- case GL_SLUMINANCE8_ALPHA8_EXT:
- case GL_SLUMINANCE_EXT:
- case GL_SLUMINANCE8_EXT:
- case GL_COMPRESSED_SRGB_EXT:
- case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
- case GL_COMPRESSED_SLUMINANCE_EXT:
- case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
-#endif /* FEATURE_EXT_texture_sRGB */
- return GL_TRUE;
- /* signed texture formats */
- case GL_RGBA_SNORM:
- case GL_RGBA8_SNORM:
- return GL_TRUE;
- case GL_YCBCR_MESA: /* not considered to be RGB */
- /* fall-through */
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a color index format.
- */
-GLboolean
-_mesa_is_index_format(GLenum format)
-{
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_COLOR_INDEX1_EXT:
- case GL_COLOR_INDEX2_EXT:
- case GL_COLOR_INDEX4_EXT:
- case GL_COLOR_INDEX8_EXT:
- case GL_COLOR_INDEX12_EXT:
- case GL_COLOR_INDEX16_EXT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a depth component format.
- */
-GLboolean
-_mesa_is_depth_format(GLenum format)
-{
- switch (format) {
- case GL_DEPTH_COMPONENT:
- case GL_DEPTH_COMPONENT16:
- case GL_DEPTH_COMPONENT24:
- case GL_DEPTH_COMPONENT32:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a stencil format.
- */
-GLboolean
-_mesa_is_stencil_format(GLenum format)
-{
- switch (format) {
- case GL_STENCIL_INDEX:
- case GL_DEPTH_STENCIL:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a YCbCr format.
- */
-GLboolean
-_mesa_is_ycbcr_format(GLenum format)
-{
- switch (format) {
- case GL_YCBCR_MESA:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a depth+stencil format.
- */
-GLboolean
-_mesa_is_depthstencil_format(GLenum format)
-{
- switch (format) {
- case GL_DEPTH24_STENCIL8_EXT:
- case GL_DEPTH_STENCIL_EXT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a depth or stencil format.
- */
-GLboolean
-_mesa_is_depth_or_stencil_format(GLenum format)
-{
- switch (format) {
- case GL_DEPTH_COMPONENT:
- case GL_DEPTH_COMPONENT16:
- case GL_DEPTH_COMPONENT24:
- case GL_DEPTH_COMPONENT32:
- case GL_STENCIL_INDEX:
- case GL_STENCIL_INDEX1_EXT:
- case GL_STENCIL_INDEX4_EXT:
- case GL_STENCIL_INDEX8_EXT:
- case GL_STENCIL_INDEX16_EXT:
- case GL_DEPTH_STENCIL_EXT:
- case GL_DEPTH24_STENCIL8_EXT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given image format is a dudv format.
- */
-GLboolean
-_mesa_is_dudv_format(GLenum format)
-{
- switch (format) {
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if the given format is an integer (non-normalized) format.
- */
-GLboolean
-_mesa_is_integer_format(GLenum format)
-{
- switch (format) {
- case GL_RED_INTEGER_EXT:
- case GL_GREEN_INTEGER_EXT:
- case GL_BLUE_INTEGER_EXT:
- case GL_ALPHA_INTEGER_EXT:
- case GL_RGB_INTEGER_EXT:
- case GL_RGBA_INTEGER_EXT:
- case GL_BGR_INTEGER_EXT:
- case GL_BGRA_INTEGER_EXT:
- case GL_LUMINANCE_INTEGER_EXT:
- case GL_LUMINANCE_ALPHA_INTEGER_EXT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Test if an image format is a supported compressed format.
- * \param format the internal format token provided by the user.
- * \return GL_TRUE if compressed, GL_FALSE if uncompressed
- */
-GLboolean
-_mesa_is_compressed_format(GLcontext *ctx, GLenum format)
-{
- switch (format) {
- case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
- return ctx->Extensions.EXT_texture_compression_s3tc;
- case GL_RGB_S3TC:
- case GL_RGB4_S3TC:
- case GL_RGBA_S3TC:
- case GL_RGBA4_S3TC:
- return ctx->Extensions.S3_s3tc;
- case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
- return ctx->Extensions.EXT_texture_sRGB
- && ctx->Extensions.EXT_texture_compression_s3tc;
- case GL_COMPRESSED_RGB_FXT1_3DFX:
- case GL_COMPRESSED_RGBA_FXT1_3DFX:
- return ctx->Extensions.TDFX_texture_compression_FXT1;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * Return the address of a specific pixel in an image (1D, 2D or 3D).
- *
- * Pixel unpacking/packing parameters are observed according to \p packing.
- *
- * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
- * \param image starting address of image data
- * \param width the image width
- * \param height theimage height
- * \param format the pixel format
- * \param type the pixel data type
- * \param packing the pixelstore attributes
- * \param img which image in the volume (0 for 1D or 2D images)
- * \param row row of pixel in the image (0 for 1D images)
- * \param column column of pixel in the image
- *
- * \return address of pixel on success, or NULL on error.
- *
- * \sa gl_pixelstore_attrib.
- */
-GLvoid *
-_mesa_image_address( GLuint dimensions,
- const struct gl_pixelstore_attrib *packing,
- const GLvoid *image,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLint img, GLint row, GLint column )
-{
- GLint alignment; /* 1, 2 or 4 */
- GLint pixels_per_row;
- GLint rows_per_image;
- GLint skiprows;
- GLint skippixels;
- GLint skipimages; /* for 3-D volume images */
- GLubyte *pixel_addr;
-
- ASSERT(dimensions >= 1 && dimensions <= 3);
-
- alignment = packing->Alignment;
- if (packing->RowLength > 0) {
- pixels_per_row = packing->RowLength;
- }
- else {
- pixels_per_row = width;
- }
- if (packing->ImageHeight > 0) {
- rows_per_image = packing->ImageHeight;
- }
- else {
- rows_per_image = height;
- }
-
- skippixels = packing->SkipPixels;
- /* Note: SKIP_ROWS _is_ used for 1D images */
- skiprows = packing->SkipRows;
- /* Note: SKIP_IMAGES is only used for 3D images */
- skipimages = (dimensions == 3) ? packing->SkipImages : 0;
-
- if (type == GL_BITMAP) {
- /* BITMAP data */
- GLint comp_per_pixel; /* components per pixel */
- GLint bytes_per_comp; /* bytes per component */
- GLint bytes_per_row;
- GLint bytes_per_image;
-
- /* Compute bytes per component */
- bytes_per_comp = _mesa_sizeof_packed_type( type );
- if (bytes_per_comp < 0) {
- return NULL;
- }
-
- /* Compute number of components per pixel */
- comp_per_pixel = _mesa_components_in_format( format );
- if (comp_per_pixel < 0) {
- return NULL;
- }
-
- bytes_per_row = alignment
- * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
-
- bytes_per_image = bytes_per_row * rows_per_image;
-
- pixel_addr = (GLubyte *) image
- + (skipimages + img) * bytes_per_image
- + (skiprows + row) * bytes_per_row
- + (skippixels + column) / 8;
- }
- else {
- /* Non-BITMAP data */
- GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
- GLint topOfImage;
-
- bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
-
- /* The pixel type and format should have been error checked earlier */
- assert(bytes_per_pixel > 0);
-
- bytes_per_row = pixels_per_row * bytes_per_pixel;
- remainder = bytes_per_row % alignment;
- if (remainder > 0)
- bytes_per_row += (alignment - remainder);
-
- ASSERT(bytes_per_row % alignment == 0);
-
- bytes_per_image = bytes_per_row * rows_per_image;
-
- if (packing->Invert) {
- /* set pixel_addr to the last row */
- topOfImage = bytes_per_row * (height - 1);
- bytes_per_row = -bytes_per_row;
- }
- else {
- topOfImage = 0;
- }
-
- /* compute final pixel address */
- pixel_addr = (GLubyte *) image
- + (skipimages + img) * bytes_per_image
- + topOfImage
- + (skiprows + row) * bytes_per_row
- + (skippixels + column) * bytes_per_pixel;
- }
-
- return (GLvoid *) pixel_addr;
-}
-
-
-GLvoid *
-_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
- const GLvoid *image,
- GLsizei width,
- GLenum format, GLenum type,
- GLint column )
-{
- return _mesa_image_address(1, packing, image, width, 1,
- format, type, 0, 0, column);
-}
-
-
-GLvoid *
-_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
- const GLvoid *image,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLint row, GLint column )
-{
- return _mesa_image_address(2, packing, image, width, height,
- format, type, 0, row, column);
-}
-
-
-GLvoid *
-_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
- const GLvoid *image,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLint img, GLint row, GLint column )
-{
- return _mesa_image_address(3, packing, image, width, height,
- format, type, img, row, column);
-}
-
-
-
-/**
- * Compute the stride (in bytes) between image rows.
- *
- * \param packing the pixelstore attributes
- * \param width image width.
- * \param format pixel format.
- * \param type pixel data type.
- *
- * \return the stride in bytes for the given parameters, or -1 if error
- */
-GLint
-_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
- GLint width, GLenum format, GLenum type )
-{
- GLint bytesPerRow, remainder;
-
- ASSERT(packing);
-
- if (type == GL_BITMAP) {
- if (packing->RowLength == 0) {
- bytesPerRow = (width + 7) / 8;
- }
- else {
- bytesPerRow = (packing->RowLength + 7) / 8;
- }
- }
- else {
- /* Non-BITMAP data */
- const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
- if (bytesPerPixel <= 0)
- return -1; /* error */
- if (packing->RowLength == 0) {
- bytesPerRow = bytesPerPixel * width;
- }
- else {
- bytesPerRow = bytesPerPixel * packing->RowLength;
- }
- }
-
- remainder = bytesPerRow % packing->Alignment;
- if (remainder > 0) {
- bytesPerRow += (packing->Alignment - remainder);
- }
-
- if (packing->Invert) {
- /* negate the bytes per row (negative row stride) */
- bytesPerRow = -bytesPerRow;
- }
-
- return bytesPerRow;
-}
-
-
-#if _HAVE_FULL_GL
-
-/*
- * Compute the stride between images in a 3D texture (in bytes) for the given
- * pixel packing parameters and image width, format and type.
- */
-GLint
-_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
- GLint width, GLint height,
- GLenum format, GLenum type )
-{
- GLint bytesPerRow, bytesPerImage, remainder;
-
- ASSERT(packing);
-
- if (type == GL_BITMAP) {
- if (packing->RowLength == 0) {
- bytesPerRow = (width + 7) / 8;
- }
- else {
- bytesPerRow = (packing->RowLength + 7) / 8;
- }
- }
- else {
- const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
-
- if (bytesPerPixel <= 0)
- return -1; /* error */
- if (packing->RowLength == 0) {
- bytesPerRow = bytesPerPixel * width;
- }
- else {
- bytesPerRow = bytesPerPixel * packing->RowLength;
- }
- }
-
- remainder = bytesPerRow % packing->Alignment;
- if (remainder > 0)
- bytesPerRow += (packing->Alignment - remainder);
-
- if (packing->ImageHeight == 0)
- bytesPerImage = bytesPerRow * height;
- else
- bytesPerImage = bytesPerRow * packing->ImageHeight;
-
- return bytesPerImage;
-}
-
-
-/*
- * Unpack a 32x32 pixel polygon stipple from user memory using the
- * current pixel unpack settings.
- */
-void
-_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
- const struct gl_pixelstore_attrib *unpacking )
-{
- GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking);
- if (ptrn) {
- /* Convert pattern from GLubytes to GLuints and handle big/little
- * endian differences
- */
- GLubyte *p = ptrn;
- GLint i;
- for (i = 0; i < 32; i++) {
- dest[i] = (p[0] << 24)
- | (p[1] << 16)
- | (p[2] << 8)
- | (p[3] );
- p += 4;
- }
- free(ptrn);
- }
-}
-
-
-/*
- * Pack polygon stipple into user memory given current pixel packing
- * settings.
- */
-void
-_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest,
- const struct gl_pixelstore_attrib *packing )
-{
- /* Convert pattern from GLuints to GLubytes to handle big/little
- * endian differences.
- */
- GLubyte ptrn[32*4];
- GLint i;
- for (i = 0; i < 32; i++) {
- ptrn[i * 4 + 0] = (GLubyte) ((pattern[i] >> 24) & 0xff);
- ptrn[i * 4 + 1] = (GLubyte) ((pattern[i] >> 16) & 0xff);
- ptrn[i * 4 + 2] = (GLubyte) ((pattern[i] >> 8 ) & 0xff);
- ptrn[i * 4 + 3] = (GLubyte) ((pattern[i] ) & 0xff);
- }
-
- _mesa_pack_bitmap(32, 32, ptrn, dest, packing);
-}
-
-
-/*
- * Unpack bitmap data. Resulting data will be in most-significant-bit-first
- * order with row alignment = 1 byte.
- */
-GLvoid *
-_mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
- const struct gl_pixelstore_attrib *packing )
-{
- GLint bytes, row, width_in_bytes;
- GLubyte *buffer, *dst;
-
- if (!pixels)
- return NULL;
-
- /* Alloc dest storage */
- bytes = ((width + 7) / 8 * height);
- buffer = (GLubyte *) malloc( bytes );
- if (!buffer)
- return NULL;
-
- width_in_bytes = CEILING( width, 8 );
- dst = buffer;
- for (row = 0; row < height; row++) {
- const GLubyte *src = (const GLubyte *)
- _mesa_image_address2d(packing, pixels, width, height,
- GL_COLOR_INDEX, GL_BITMAP, row, 0);
- if (!src) {
- free(buffer);
- return NULL;
- }
-
- if ((packing->SkipPixels & 7) == 0) {
- memcpy( dst, src, width_in_bytes );
- if (packing->LsbFirst) {
- flip_bytes( dst, width_in_bytes );
- }
- }
- else {
- /* handling SkipPixels is a bit tricky (no pun intended!) */
- GLint i;
- if (packing->LsbFirst) {
- GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 128) {
- srcMask = 1;
- s++;
- }
- else {
- srcMask = srcMask << 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask >> 1;
- }
- }
- }
- else {
- GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 1) {
- srcMask = 128;
- s++;
- }
- else {
- srcMask = srcMask >> 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask >> 1;
- }
- }
- }
- }
- dst += width_in_bytes;
- }
-
- return buffer;
-}
-
-
-/*
- * Pack bitmap data.
- */
-void
-_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
- GLubyte *dest, const struct gl_pixelstore_attrib *packing )
-{
- GLint row, width_in_bytes;
- const GLubyte *src;
-
- if (!source)
- return;
-
- width_in_bytes = CEILING( width, 8 );
- src = source;
- for (row = 0; row < height; row++) {
- GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dest,
- width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
- if (!dst)
- return;
-
- if ((packing->SkipPixels & 7) == 0) {
- memcpy( dst, src, width_in_bytes );
- if (packing->LsbFirst) {
- flip_bytes( dst, width_in_bytes );
- }
- }
- else {
- /* handling SkipPixels is a bit tricky (no pun intended!) */
- GLint i;
- if (packing->LsbFirst) {
- GLubyte srcMask = 128;
- GLubyte dstMask = 1 << (packing->SkipPixels & 0x7);
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 1) {
- srcMask = 128;
- s++;
- }
- else {
- srcMask = srcMask >> 1;
- }
- if (dstMask == 128) {
- dstMask = 1;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask << 1;
- }
- }
- }
- else {
- GLubyte srcMask = 128;
- GLubyte dstMask = 128 >> (packing->SkipPixels & 0x7);
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 1) {
- srcMask = 128;
- s++;
- }
- else {
- srcMask = srcMask >> 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask >> 1;
- }
- }
- }
- }
- src += width_in_bytes;
- }
-}
-
-
-/**
- * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
- * This is typically used to convert a bitmap into a GLubyte/pixel texture.
- * "On" bits will set texels to \p onValue.
- * "Off" bits will not modify texels.
- * \param width src bitmap width in pixels
- * \param height src bitmap height in pixels
- * \param unpack bitmap unpacking state
- * \param bitmap the src bitmap data
- * \param destBuffer start of dest buffer
- * \param destStride row stride in dest buffer
- * \param onValue if bit is 1, set destBuffer pixel to this value
- */
-void
-_mesa_expand_bitmap(GLsizei width, GLsizei height,
- const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap,
- GLubyte *destBuffer, GLint destStride,
- GLubyte onValue)
-{
- const GLubyte *srcRow = (const GLubyte *)
- _mesa_image_address2d(unpack, bitmap, width, height,
- GL_COLOR_INDEX, GL_BITMAP, 0, 0);
- const GLint srcStride = _mesa_image_row_stride(unpack, width,
- GL_COLOR_INDEX, GL_BITMAP);
- GLint row, col;
-
-#define SET_PIXEL(COL, ROW) \
- destBuffer[(ROW) * destStride + (COL)] = onValue;
-
- for (row = 0; row < height; row++) {
- const GLubyte *src = srcRow;
-
- if (unpack->LsbFirst) {
- /* Lsb first */
- GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
- for (col = 0; col < width; col++) {
-
- if (*src & mask) {
- SET_PIXEL(col, row);
- }
-
- if (mask == 128U) {
- src++;
- mask = 1U;
- }
- else {
- mask = mask << 1;
- }
- }
-
- /* get ready for next row */
- if (mask != 1)
- src++;
- }
- else {
- /* Msb first */
- GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
- for (col = 0; col < width; col++) {
-
- if (*src & mask) {
- SET_PIXEL(col, row);
- }
-
- if (mask == 1U) {
- src++;
- mask = 128U;
- }
- else {
- mask = mask >> 1;
- }
- }
-
- /* get ready for next row */
- if (mask != 128)
- src++;
- }
-
- srcRow += srcStride;
- } /* row */
-
-#undef SET_PIXEL
-}
-
-
-/**********************************************************************/
-/***** Pixel processing functions ******/
-/**********************************************************************/
-
-/*
- * Apply scale and bias factors to an array of RGBA pixels.
- */
-void
-_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],
- GLfloat rScale, GLfloat gScale,
- GLfloat bScale, GLfloat aScale,
- GLfloat rBias, GLfloat gBias,
- GLfloat bBias, GLfloat aBias)
-{
- if (rScale != 1.0 || rBias != 0.0) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;
- }
- }
- if (gScale != 1.0 || gBias != 0.0) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;
- }
- }
- if (bScale != 1.0 || bBias != 0.0) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;
- }
- }
- if (aScale != 1.0 || aBias != 0.0) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;
- }
- }
-}
-
-
-/*
- * Apply pixel mapping to an array of floating point RGBA pixels.
- */
-void
-_mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
-{
- const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1);
- const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);
- const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);
- const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);
- const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;
- const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;
- const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;
- const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;
- GLuint i;
- for (i=0;i<n;i++) {
- GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
- GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
- GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
- GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
- rgba[i][RCOMP] = rMap[IROUND(r * rscale)];
- rgba[i][GCOMP] = gMap[IROUND(g * gscale)];
- rgba[i][BCOMP] = bMap[IROUND(b * bscale)];
- rgba[i][ACOMP] = aMap[IROUND(a * ascale)];
- }
-}
-
-
-/*
- * Apply the color matrix and post color matrix scaling and biasing.
- */
-void
-_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
-{
- const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0];
- const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0];
- const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1];
- const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1];
- const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2];
- const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2];
- const GLfloat as = ctx->Pixel.PostColorMatrixScale[3];
- const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3];
- const GLfloat *m = ctx->ColorMatrixStack.Top->m;
- GLuint i;
- for (i = 0; i < n; i++) {
- const GLfloat r = rgba[i][RCOMP];
- const GLfloat g = rgba[i][GCOMP];
- const GLfloat b = rgba[i][BCOMP];
- const GLfloat a = rgba[i][ACOMP];
- rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
- rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
- rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
- rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
- }
-}
-
-
-/**
- * Apply a color table lookup to an array of floating point RGBA colors.
- */
-void
-_mesa_lookup_rgba_float(const struct gl_color_table *table,
- GLuint n, GLfloat rgba[][4])
-{
- const GLint max = table->Size - 1;
- const GLfloat scale = (GLfloat) max;
- const GLfloat *lut = table->TableF;
- GLuint i;
-
- if (!table->TableF || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- for (i = 0; i < n; i++) {
- GLint jL = IROUND(rgba[i][RCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- GLfloat luminance, alpha;
- jL = CLAMP(jL, 0, max);
- jA = CLAMP(jA, 0, max);
- luminance = lut[jL * 2 + 0];
- alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;;
- }
- break;
- case GL_RGB:
- /* replace RGB with RGB */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- break;
- case GL_RGBA:
- /* replace RGBA with RGBA */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- jA = CLAMP(jA, 0, max);
- rgba[i][RCOMP] = lut[jR * 4 + 0];
- rgba[i][GCOMP] = lut[jG * 4 + 1];
- rgba[i][BCOMP] = lut[jB * 4 + 2];
- rgba[i][ACOMP] = lut[jA * 4 + 3];
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
- return;
- }
-}
-
-
-
-/**
- * Apply a color table lookup to an array of ubyte/RGBA colors.
- */
-void
-_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
- GLuint n, GLubyte rgba[][4])
-{
- const GLubyte *lut = table->TableUB;
- const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;
- GLuint i;
-
- if (!table->TableUB || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = lut[j];
- }
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];
- GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = l;
- rgba[i][ACOMP] = a;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- GLubyte luminance = lut[jL * 2 + 0];
- GLubyte alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;
- }
- }
- break;
- case GL_RGB:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- }
- break;
- case GL_RGBA:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];
- rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
- }
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");
- return;
- }
-}
-
-
-
-/*
- * Map color indexes to float rgba values.
- */
-void
-_mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n,
- const GLuint index[], GLfloat rgba[][4] )
-{
- GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
- GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
- GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
- GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
- const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;
- const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;
- const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;
- const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;
- GLuint i;
- for (i=0;i<n;i++) {
- rgba[i][RCOMP] = rMap[index[i] & rmask];
- rgba[i][GCOMP] = gMap[index[i] & gmask];
- rgba[i][BCOMP] = bMap[index[i] & bmask];
- rgba[i][ACOMP] = aMap[index[i] & amask];
- }
-}
-
-
-/**
- * Map ubyte color indexes to ubyte/RGBA values.
- */
-void
-_mesa_map_ci8_to_rgba8(const GLcontext *ctx, GLuint n, const GLubyte index[],
- GLubyte rgba[][4])
-{
- GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
- GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
- GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
- GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
- const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;
- const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;
- const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;
- const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;
- GLuint i;
- for (i=0;i<n;i++) {
- rgba[i][RCOMP] = rMap[index[i] & rmask];
- rgba[i][GCOMP] = gMap[index[i] & gmask];
- rgba[i][BCOMP] = bMap[index[i] & bmask];
- rgba[i][ACOMP] = aMap[index[i] & amask];
- }
-}
-
-
-void
-_mesa_scale_and_bias_depth(const GLcontext *ctx, GLuint n,
- GLfloat depthValues[])
-{
- const GLfloat scale = ctx->Pixel.DepthScale;
- const GLfloat bias = ctx->Pixel.DepthBias;
- GLuint i;
- for (i = 0; i < n; i++) {
- GLfloat d = depthValues[i] * scale + bias;
- depthValues[i] = CLAMP(d, 0.0F, 1.0F);
- }
-}
-
-
-void
-_mesa_scale_and_bias_depth_uint(const GLcontext *ctx, GLuint n,
- GLuint depthValues[])
-{
- const GLdouble max = (double) 0xffffffff;
- const GLdouble scale = ctx->Pixel.DepthScale;
- const GLdouble bias = ctx->Pixel.DepthBias * max;
- GLuint i;
- for (i = 0; i < n; i++) {
- GLdouble d = (GLdouble) depthValues[i] * scale + bias;
- d = CLAMP(d, 0.0, max);
- depthValues[i] = (GLuint) d;
- }
-}
-
-
-
-/*
- * Update the min/max values from an array of fragment colors.
- */
-static void
-update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
-{
- GLuint i;
- for (i = 0; i < n; i++) {
- /* update mins */
- if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP])
- ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP];
- if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP])
- ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP];
- if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP])
- ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP];
- if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP])
- ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP];
-
- /* update maxs */
- if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP])
- ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP];
- if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP])
- ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP];
- if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP])
- ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP];
- if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP])
- ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP];
- }
-}
-
-
-/*
- * Update the histogram values from an array of fragment colors.
- */
-static void
-update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
-{
- const GLint max = ctx->Histogram.Width - 1;
- GLfloat w = (GLfloat) max;
- GLuint i;
-
- if (ctx->Histogram.Width == 0)
- return;
-
- for (i = 0; i < n; i++) {
- GLint ri = IROUND(rgba[i][RCOMP] * w);
- GLint gi = IROUND(rgba[i][GCOMP] * w);
- GLint bi = IROUND(rgba[i][BCOMP] * w);
- GLint ai = IROUND(rgba[i][ACOMP] * w);
- ri = CLAMP(ri, 0, max);
- gi = CLAMP(gi, 0, max);
- bi = CLAMP(bi, 0, max);
- ai = CLAMP(ai, 0, max);
- ctx->Histogram.Count[ri][RCOMP]++;
- ctx->Histogram.Count[gi][GCOMP]++;
- ctx->Histogram.Count[bi][BCOMP]++;
- ctx->Histogram.Count[ai][ACOMP]++;
- }
-}
-
-
-/**
- * Apply various pixel transfer operations to an array of RGBA pixels
- * as indicated by the transferOps bitmask
- */
-void
-_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
- GLuint n, GLfloat rgba[][4])
-{
- /* scale & bias */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(n, rgba,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba( ctx, n, rgba );
- }
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba);
- }
- /* convolution */
- if (transferOps & IMAGE_CONVOLUTION_BIT) {
- /* this has to be done in the calling code */
- _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
- }
- /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
- if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
- _mesa_scale_and_bias_rgba(n, rgba,
- ctx->Pixel.PostConvolutionScale[RCOMP],
- ctx->Pixel.PostConvolutionScale[GCOMP],
- ctx->Pixel.PostConvolutionScale[BCOMP],
- ctx->Pixel.PostConvolutionScale[ACOMP],
- ctx->Pixel.PostConvolutionBias[RCOMP],
- ctx->Pixel.PostConvolutionBias[GCOMP],
- ctx->Pixel.PostConvolutionBias[BCOMP],
- ctx->Pixel.PostConvolutionBias[ACOMP]);
- }
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba);
- }
- /* color matrix transform */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, n, rgba);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- /* update min/max values */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- /* clamping to [0,1] */
- if (transferOps & IMAGE_CLAMP_BIT) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
- rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
- rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
- rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
- }
- }
-}
-
-
-/*
- * Apply color index shift and offset to an array of pixels.
- */
-static void
-shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
-{
- GLint shift = ctx->Pixel.IndexShift;
- GLint offset = ctx->Pixel.IndexOffset;
- GLuint i;
- if (shift > 0) {
- for (i=0;i<n;i++) {
- indexes[i] = (indexes[i] << shift) + offset;
- }
- }
- else if (shift < 0) {
- shift = -shift;
- for (i=0;i<n;i++) {
- indexes[i] = (indexes[i] >> shift) + offset;
- }
- }
- else {
- for (i=0;i<n;i++) {
- indexes[i] = indexes[i] + offset;
- }
- }
-}
-
-
-
-/**
- * Apply color index shift, offset and table lookup to an array
- * of color indexes;
- */
-void
-_mesa_apply_ci_transfer_ops(const GLcontext *ctx, GLbitfield transferOps,
- GLuint n, GLuint indexes[])
-{
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- shift_and_offset_ci(ctx, n, indexes);
- }
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
- GLuint i;
- for (i = 0; i < n; i++) {
- const GLuint j = indexes[i] & mask;
- indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
- }
- }
-}
-
-
-/**
- * Apply stencil index shift, offset and table lookup to an array
- * of stencil values.
- */
-void
-_mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n,
- GLstencil stencil[])
-{
- if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
- const GLint offset = ctx->Pixel.IndexOffset;
- GLint shift = ctx->Pixel.IndexShift;
- GLuint i;
- if (shift > 0) {
- for (i = 0; i < n; i++) {
- stencil[i] = (stencil[i] << shift) + offset;
- }
- }
- else if (shift < 0) {
- shift = -shift;
- for (i = 0; i < n; i++) {
- stencil[i] = (stencil[i] >> shift) + offset;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- stencil[i] = stencil[i] + offset;
- }
- }
- }
- if (ctx->Pixel.MapStencilFlag) {
- GLuint mask = ctx->PixelMaps.StoS.Size - 1;
- GLuint i;
- for (i = 0; i < n; i++) {
- stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
- }
- }
-}
-
-
-/**
- * Used to pack an array [][4] of RGBA float colors as specified
- * by the dstFormat, dstType and dstPacking. Used by glReadPixels,
- * glGetConvolutionFilter(), etc.
- * Note: the rgba values will be modified by this function when any pixel
- * transfer ops are enabled.
- */
-void
-_mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4],
- GLenum dstFormat, GLenum dstType,
- GLvoid *dstAddr,
- const struct gl_pixelstore_attrib *dstPacking,
- GLbitfield transferOps)
-{
- GLfloat luminance[MAX_WIDTH];
- const GLint comps = _mesa_components_in_format(dstFormat);
- GLuint i;
-
- /* XXX
- * This test should probably go away. Have the caller set/clear the
- * IMAGE_CLAMP_BIT as needed.
- */
- if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
- /* need to clamp to [0, 1] */
- transferOps |= IMAGE_CLAMP_BIT;
- }
-
- if (transferOps) {
- _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
- if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) {
- return;
- }
- }
-
- if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
- /* compute luminance values */
- if (transferOps & IMAGE_CLAMP_BIT) {
- for (i = 0; i < n; i++) {
- GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
- luminance[i] = CLAMP(sum, 0.0F, 1.0F);
- }
- }
- else {
- for (i = 0; i < n; i++) {
- luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
- }
- }
- }
-
- /*
- * Pack/store the pixels. Ugh! Lots of cases!!!
- */
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
- dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
- dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
- dst[i*2+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = rgba[i][RCOMP];
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = rgba[i][GCOMP];
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = rgba[i][BCOMP];
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = rgba[i][ACOMP];
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = luminance[i];
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = luminance[i];
- dst[i*2+1] = rgba[i][ACOMP];
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = rgba[i][RCOMP];
- dst[i*3+1] = rgba[i][GCOMP];
- dst[i*3+2] = rgba[i][BCOMP];
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = rgba[i][RCOMP];
- dst[i*4+1] = rgba[i][GCOMP];
- dst[i*4+2] = rgba[i][BCOMP];
- dst[i*4+3] = rgba[i][ACOMP];
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = rgba[i][BCOMP];
- dst[i*3+1] = rgba[i][GCOMP];
- dst[i*3+2] = rgba[i][RCOMP];
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = rgba[i][BCOMP];
- dst[i*4+1] = rgba[i][GCOMP];
- dst[i*4+2] = rgba[i][RCOMP];
- dst[i*4+3] = rgba[i][ACOMP];
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = rgba[i][ACOMP];
- dst[i*4+1] = rgba[i][BCOMP];
- dst[i*4+2] = rgba[i][GCOMP];
- dst[i*4+3] = rgba[i][RCOMP];
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = rgba[i][RCOMP];
- dst[i*2+1] = rgba[i][GCOMP];
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLhalfARB *dst = (GLhalfARB *) dstAddr;
- switch (dstFormat) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = _mesa_float_to_half(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = _mesa_float_to_half(luminance[i]);
- dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
- dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
- dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
- dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
- dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
- dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
- dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
- dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
- dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
- dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
- dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
- dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
- dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
- dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
- }
- break;
- case GL_DUDV_ATI:
- case GL_DU8DV8_ATI:
- for (i=0;i<n;i++) {
- dst[i*2+0] = _mesa_float_to_half(rgba[i][RCOMP]);
- dst[i*2+1] = _mesa_float_to_half(rgba[i][GCOMP]);
- }
- break;
- default:
- _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- if (dstFormat == GL_RGB) {
- GLubyte *dst = (GLubyte *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) << 5)
- | (IROUND(rgba[i][GCOMP] * 7.0F) << 2)
- | (IROUND(rgba[i][BCOMP] * 3.0F) );
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- if (dstFormat == GL_RGB) {
- GLubyte *dst = (GLubyte *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) )
- | (IROUND(rgba[i][GCOMP] * 7.0F) << 3)
- | (IROUND(rgba[i][BCOMP] * 3.0F) << 6);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- if (dstFormat == GL_RGB) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
- | (IROUND(rgba[i][GCOMP] * 63.0F) << 5)
- | (IROUND(rgba[i][BCOMP] * 31.0F) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (dstFormat == GL_RGB) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) )
- | (IROUND(rgba[i][GCOMP] * 63.0F) << 5)
- | (IROUND(rgba[i][BCOMP] * 31.0F) << 11);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- if (dstFormat == GL_RGBA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) << 12)
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][BCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][ACOMP] * 15.0F) );
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) << 12)
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][RCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][ACOMP] * 15.0F) );
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) << 12)
- | (IROUND(rgba[i][BCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][RCOMP] * 15.0F) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- if (dstFormat == GL_RGBA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) )
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][BCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) )
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][RCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) )
- | (IROUND(rgba[i][BCOMP] * 15.0F) << 4)
- | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
- | (IROUND(rgba[i][RCOMP] * 15.0F) << 12);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- if (dstFormat == GL_RGBA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 6)
- | (IROUND(rgba[i][BCOMP] * 31.0F) << 1)
- | (IROUND(rgba[i][ACOMP] * 1.0F) );
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) << 11)
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 6)
- | (IROUND(rgba[i][RCOMP] * 31.0F) << 1)
- | (IROUND(rgba[i][ACOMP] * 1.0F) );
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) << 11)
- | (IROUND(rgba[i][BCOMP] * 31.0F) << 6)
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 1)
- | (IROUND(rgba[i][RCOMP] * 1.0F) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (dstFormat == GL_RGBA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) )
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 5)
- | (IROUND(rgba[i][BCOMP] * 31.0F) << 10)
- | (IROUND(rgba[i][ACOMP] * 1.0F) << 15);
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) )
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 5)
- | (IROUND(rgba[i][RCOMP] * 31.0F) << 10)
- | (IROUND(rgba[i][ACOMP] * 1.0F) << 15);
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLushort *dst = (GLushort *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) )
- | (IROUND(rgba[i][BCOMP] * 31.0F) << 5)
- | (IROUND(rgba[i][GCOMP] * 31.0F) << 10)
- | (IROUND(rgba[i][RCOMP] * 1.0F) << 15);
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- if (dstFormat == GL_RGBA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 255.F) << 24)
- | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
- | (IROUND(rgba[i][BCOMP] * 255.F) << 8)
- | (IROUND(rgba[i][ACOMP] * 255.F) );
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 255.F) << 24)
- | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
- | (IROUND(rgba[i][RCOMP] * 255.F) << 8)
- | (IROUND(rgba[i][ACOMP] * 255.F) );
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 255.F) << 24)
- | (IROUND(rgba[i][BCOMP] * 255.F) << 16)
- | (IROUND(rgba[i][GCOMP] * 255.F) << 8)
- | (IROUND(rgba[i][RCOMP] * 255.F) );
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- if (dstFormat == GL_RGBA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 255.0F) )
- | (IROUND(rgba[i][GCOMP] * 255.0F) << 8)
- | (IROUND(rgba[i][BCOMP] * 255.0F) << 16)
- | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 255.0F) )
- | (IROUND(rgba[i][GCOMP] * 255.0F) << 8)
- | (IROUND(rgba[i][RCOMP] * 255.0F) << 16)
- | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 255.0F) )
- | (IROUND(rgba[i][BCOMP] * 255.0F) << 8)
- | (IROUND(rgba[i][GCOMP] * 255.0F) << 16)
- | (IROUND(rgba[i][RCOMP] * 255.0F) << 24);
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- if (dstFormat == GL_RGBA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) << 22)
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
- | (IROUND(rgba[i][BCOMP] * 1023.0F) << 2)
- | (IROUND(rgba[i][ACOMP] * 3.0F) );
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) << 22)
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
- | (IROUND(rgba[i][RCOMP] * 1023.0F) << 2)
- | (IROUND(rgba[i][ACOMP] * 3.0F) );
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) << 22)
- | (IROUND(rgba[i][BCOMP] * 1023.0F) << 12)
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 2)
- | (IROUND(rgba[i][RCOMP] * 3.0F) );
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (dstFormat == GL_RGBA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) )
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
- | (IROUND(rgba[i][BCOMP] * 1023.0F) << 20)
- | (IROUND(rgba[i][ACOMP] * 3.0F) << 30);
- }
- }
- else if (dstFormat == GL_BGRA) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) )
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
- | (IROUND(rgba[i][RCOMP] * 1023.0F) << 20)
- | (IROUND(rgba[i][ACOMP] * 3.0F) << 30);
- }
- }
- else if (dstFormat == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) )
- | (IROUND(rgba[i][BCOMP] * 1023.0F) << 10)
- | (IROUND(rgba[i][GCOMP] * 1023.0F) << 20)
- | (IROUND(rgba[i][RCOMP] * 3.0F) << 30);
- }
- }
- break;
- default:
- _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float");
- return;
- }
-
- if (dstPacking->SwapBytes) {
- GLint swapSize = _mesa_sizeof_packed_type(dstType);
- if (swapSize == 2) {
- if (dstPacking->SwapBytes) {
- _mesa_swap2((GLushort *) dstAddr, n * comps);
- }
- }
- else if (swapSize == 4) {
- if (dstPacking->SwapBytes) {
- _mesa_swap4((GLuint *) dstAddr, n * comps);
- }
- }
- }
-}
-
-
-#define SWAP2BYTE(VALUE) \
- { \
- GLubyte *bytes = (GLubyte *) &(VALUE); \
- GLubyte tmp = bytes[0]; \
- bytes[0] = bytes[1]; \
- bytes[1] = tmp; \
- }
-
-#define SWAP4BYTE(VALUE) \
- { \
- GLubyte *bytes = (GLubyte *) &(VALUE); \
- GLubyte tmp = bytes[0]; \
- bytes[0] = bytes[3]; \
- bytes[3] = tmp; \
- tmp = bytes[1]; \
- bytes[1] = bytes[2]; \
- bytes[2] = tmp; \
- }
-
-
-static void
-extract_uint_indexes(GLuint n, GLuint indexes[],
- GLenum srcFormat, GLenum srcType, const GLvoid *src,
- const struct gl_pixelstore_attrib *unpack )
-{
- ASSERT(srcFormat == GL_COLOR_INDEX || srcFormat == GL_STENCIL_INDEX);
-
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_UNSIGNED_INT_24_8_EXT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT);
-
- switch (srcType) {
- case GL_BITMAP:
- {
- GLubyte *ubsrc = (GLubyte *) src;
- if (unpack->LsbFirst) {
- GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
- GLuint i;
- for (i = 0; i < n; i++) {
- indexes[i] = (*ubsrc & mask) ? 1 : 0;
- if (mask == 128) {
- mask = 1;
- ubsrc++;
- }
- else {
- mask = mask << 1;
- }
- }
- }
- else {
- GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
- GLuint i;
- for (i = 0; i < n; i++) {
- indexes[i] = (*ubsrc & mask) ? 1 : 0;
- if (mask == 1) {
- mask = 128;
- ubsrc++;
- }
- else {
- mask = mask >> 1;
- }
- }
- }
- }
- break;
- case GL_UNSIGNED_BYTE:
- {
- GLuint i;
- const GLubyte *s = (const GLubyte *) src;
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- break;
- case GL_BYTE:
- {
- GLuint i;
- const GLbyte *s = (const GLbyte *) src;
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLuint i;
- const GLushort *s = (const GLushort *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLushort value = s[i];
- SWAP2BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_SHORT:
- {
- GLuint i;
- const GLshort *s = (const GLshort *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLshort value = s[i];
- SWAP2BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint i;
- const GLuint *s = (const GLuint *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLuint value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_INT:
- {
- GLuint i;
- const GLint *s = (const GLint *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLint value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_FLOAT:
- {
- GLuint i;
- const GLfloat *s = (const GLfloat *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLfloat value = s[i];
- SWAP4BYTE(value);
- indexes[i] = (GLuint) value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = (GLuint) s[i];
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLuint i;
- const GLhalfARB *s = (const GLhalfARB *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLhalfARB value = s[i];
- SWAP2BYTE(value);
- indexes[i] = (GLuint) _mesa_half_to_float(value);
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = (GLuint) _mesa_half_to_float(s[i]);
- }
- }
- break;
- case GL_UNSIGNED_INT_24_8_EXT:
- {
- GLuint i;
- const GLuint *s = (const GLuint *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLuint value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value & 0xff; /* lower 8 bits */
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i] & 0xff; /* lower 8 bits */
- }
- }
- break;
-
- default:
- _mesa_problem(NULL, "bad srcType in extract_uint_indexes");
- return;
- }
-}
-
-
-/*
- * This function extracts floating point RGBA values from arbitrary
- * image data. srcFormat and srcType are the format and type parameters
- * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
- *
- * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
- * implements the "Conversion to floating point", "Conversion to RGB",
- * and "Final Expansion to RGBA" operations.
- *
- * Args: n - number of pixels
- * rgba - output colors
- * srcFormat - format of incoming data
- * srcType - data type of incoming data
- * src - source data pointer
- * swapBytes - perform byteswapping of incoming data?
- */
-static void
-extract_float_rgba(GLuint n, GLfloat rgba[][4],
- GLenum srcFormat, GLenum srcType, const GLvoid *src,
- GLboolean swapBytes)
-{
- GLint redIndex, greenIndex, blueIndex, alphaIndex;
- GLint stride;
- GLint rComp, bComp, gComp, aComp;
- GLboolean intFormat;
- GLfloat rs = 1.0f, gs = 1.0f, bs = 1.0f, as = 1.0f; /* scale factors */
-
- ASSERT(srcFormat == GL_RED ||
- srcFormat == GL_GREEN ||
- srcFormat == GL_BLUE ||
- srcFormat == GL_ALPHA ||
- srcFormat == GL_LUMINANCE ||
- srcFormat == GL_LUMINANCE_ALPHA ||
- srcFormat == GL_INTENSITY ||
- srcFormat == GL_RGB ||
- srcFormat == GL_BGR ||
- srcFormat == GL_RGBA ||
- srcFormat == GL_BGRA ||
- srcFormat == GL_ABGR_EXT ||
- srcFormat == GL_DU8DV8_ATI ||
- srcFormat == GL_DUDV_ATI ||
- srcFormat == GL_RED_INTEGER_EXT ||
- srcFormat == GL_GREEN_INTEGER_EXT ||
- srcFormat == GL_BLUE_INTEGER_EXT ||
- srcFormat == GL_ALPHA_INTEGER_EXT ||
- srcFormat == GL_RGB_INTEGER_EXT ||
- srcFormat == GL_RGBA_INTEGER_EXT ||
- srcFormat == GL_BGR_INTEGER_EXT ||
- srcFormat == GL_BGRA_INTEGER_EXT ||
- srcFormat == GL_LUMINANCE_INTEGER_EXT ||
- srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT);
-
- ASSERT(srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT ||
- srcType == GL_UNSIGNED_BYTE_3_3_2 ||
- srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
- srcType == GL_UNSIGNED_SHORT_5_6_5 ||
- srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
- srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- srcType == GL_UNSIGNED_INT_8_8_8_8 ||
- srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
- srcType == GL_UNSIGNED_INT_10_10_10_2 ||
- srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
- rComp = gComp = bComp = aComp = -1;
-
- switch (srcFormat) {
- case GL_RED:
- case GL_RED_INTEGER_EXT:
- redIndex = 0;
- greenIndex = blueIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_GREEN:
- case GL_GREEN_INTEGER_EXT:
- greenIndex = 0;
- redIndex = blueIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_BLUE:
- case GL_BLUE_INTEGER_EXT:
- blueIndex = 0;
- redIndex = greenIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_ALPHA:
- case GL_ALPHA_INTEGER_EXT:
- redIndex = greenIndex = blueIndex = -1;
- alphaIndex = 0;
- stride = 1;
- break;
- case GL_LUMINANCE:
- case GL_LUMINANCE_INTEGER_EXT:
- redIndex = greenIndex = blueIndex = 0;
- alphaIndex = -1;
- stride = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE_ALPHA_INTEGER_EXT:
- redIndex = greenIndex = blueIndex = 0;
- alphaIndex = 1;
- stride = 2;
- break;
- case GL_INTENSITY:
- redIndex = greenIndex = blueIndex = alphaIndex = 0;
- stride = 1;
- break;
- case GL_RGB:
- case GL_RGB_INTEGER:
- redIndex = 0;
- greenIndex = 1;
- blueIndex = 2;
- alphaIndex = -1;
- rComp = 0;
- gComp = 1;
- bComp = 2;
- aComp = 3;
- stride = 3;
- break;
- case GL_BGR:
- redIndex = 2;
- greenIndex = 1;
- blueIndex = 0;
- alphaIndex = -1;
- rComp = 2;
- gComp = 1;
- bComp = 0;
- aComp = 3;
- stride = 3;
- break;
- case GL_RGBA:
- case GL_RGBA_INTEGER:
- redIndex = 0;
- greenIndex = 1;
- blueIndex = 2;
- alphaIndex = 3;
- rComp = 0;
- gComp = 1;
- bComp = 2;
- aComp = 3;
- stride = 4;
- break;
- case GL_BGRA:
- redIndex = 2;
- greenIndex = 1;
- blueIndex = 0;
- alphaIndex = 3;
- rComp = 2;
- gComp = 1;
- bComp = 0;
- aComp = 3;
- stride = 4;
- break;
- case GL_ABGR_EXT:
- redIndex = 3;
- greenIndex = 2;
- blueIndex = 1;
- alphaIndex = 0;
- rComp = 3;
- gComp = 2;
- bComp = 1;
- aComp = 0;
- stride = 4;
- break;
- case GL_DU8DV8_ATI:
- case GL_DUDV_ATI:
- redIndex = 0;
- greenIndex = 1;
- blueIndex = -1;
- alphaIndex = -1;
- stride = 2;
- break;
- default:
- _mesa_problem(NULL, "bad srcFormat %s in extract float data",
- _mesa_lookup_enum_by_nr(srcFormat));
- return;
- }
-
- intFormat = _mesa_is_integer_format(srcFormat);
-
-#define PROCESS(INDEX, CHANNEL, DEFAULT, DEFAULT_INT, TYPE, CONVERSION) \
- if ((INDEX) < 0) { \
- GLuint i; \
- if (intFormat) { \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = DEFAULT_INT; \
- } \
- } \
- else { \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = DEFAULT; \
- } \
- } \
- } \
- else if (swapBytes) { \
- const TYPE *s = (const TYPE *) src; \
- GLuint i; \
- for (i = 0; i < n; i++) { \
- TYPE value = s[INDEX]; \
- if (sizeof(TYPE) == 2) { \
- SWAP2BYTE(value); \
- } \
- else if (sizeof(TYPE) == 4) { \
- SWAP4BYTE(value); \
- } \
- if (intFormat) \
- rgba[i][CHANNEL] = (GLfloat) value; \
- else \
- rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
- s += stride; \
- } \
- } \
- else { \
- const TYPE *s = (const TYPE *) src; \
- GLuint i; \
- if (intFormat) { \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = (GLfloat) s[INDEX]; \
- s += stride; \
- } \
- } \
- else { \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
- s += stride; \
- } \
- } \
- }
-
- switch (srcType) {
- case GL_UNSIGNED_BYTE:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 255, GLubyte, UBYTE_TO_FLOAT);
- break;
- case GL_BYTE:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLbyte, BYTE_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLbyte, BYTE_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLbyte, BYTE_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 127, GLbyte, BYTE_TO_FLOAT);
- break;
- case GL_UNSIGNED_SHORT:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLushort, USHORT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLushort, USHORT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLushort, USHORT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 0xffff, GLushort, USHORT_TO_FLOAT);
- break;
- case GL_SHORT:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLshort, SHORT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLshort, SHORT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLshort, SHORT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 32767, GLshort, SHORT_TO_FLOAT);
- break;
- case GL_UNSIGNED_INT:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLuint, UINT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLuint, UINT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLuint, UINT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 0xffffffff, GLuint, UINT_TO_FLOAT);
- break;
- case GL_INT:
- PROCESS(redIndex, RCOMP, 0.0F, 0, GLint, INT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, 0, GLint, INT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, 0, GLint, INT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, 2147483647, GLint, INT_TO_FLOAT);
- break;
- case GL_FLOAT:
- PROCESS(redIndex, RCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
- PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
- PROCESS(blueIndex, BCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
- PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLfloat, (GLfloat));
- break;
- case GL_HALF_FLOAT_ARB:
- PROCESS(redIndex, RCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
- PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
- PROCESS(blueIndex, BCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
- PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLhalfARB, _mesa_half_to_float);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- {
- const GLubyte *ubsrc = (const GLubyte *) src;
- GLuint i;
- if (!intFormat) {
- rs = 1.0F / 7.0F;
- gs = 1.0F / 7.0F;
- bs = 1.0F / 3.0F;
- }
- for (i = 0; i < n; i ++) {
- GLubyte p = ubsrc[i];
- rgba[i][rComp] = ((p >> 5) ) * rs;
- rgba[i][gComp] = ((p >> 2) & 0x7) * gs;
- rgba[i][bComp] = ((p ) & 0x3) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- {
- const GLubyte *ubsrc = (const GLubyte *) src;
- GLuint i;
- if (!intFormat) {
- rs = 1.0F / 7.0F;
- gs = 1.0F / 7.0F;
- bs = 1.0F / 3.0F;
- }
- for (i = 0; i < n; i ++) {
- GLubyte p = ubsrc[i];
- rgba[i][rComp] = ((p ) & 0x7) * rs;
- rgba[i][gComp] = ((p >> 3) & 0x7) * gs;
- rgba[i][bComp] = ((p >> 6) ) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- if (!intFormat) {
- rs = 1.0F / 31.0F;
- gs = 1.0F / 63.0F;
- bs = 1.0F / 31.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p >> 11) ) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x3f) * gs;
- rgba[i][bComp] = ((p ) & 0x1f) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p >> 11) ) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x3f) * gs;
- rgba[i][bComp] = ((p ) & 0x1f) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (!intFormat) {
- rs = 1.0F / 31.0F;
- gs = 1.0F / 63.0F;
- bs = 1.0F / 31.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p ) & 0x1f) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x3f) * gs;
- rgba[i][bComp] = ((p >> 11) ) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p ) & 0x1f) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x3f) * gs;
- rgba[i][bComp] = ((p >> 11) ) * bs;
- rgba[i][aComp] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- if (!intFormat) {
- rs = gs = bs = as = 1.0F / 15.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p >> 12) ) * rs;
- rgba[i][gComp] = ((p >> 8) & 0xf) * gs;
- rgba[i][bComp] = ((p >> 4) & 0xf) * bs;
- rgba[i][aComp] = ((p ) & 0xf) * as;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p >> 12) ) * rs;
- rgba[i][gComp] = ((p >> 8) & 0xf) * gs;
- rgba[i][bComp] = ((p >> 4) & 0xf) * bs;
- rgba[i][aComp] = ((p ) & 0xf) * as;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- if (!intFormat) {
- rs = gs = bs = as = 1.0F / 15.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p ) & 0xf) * rs;
- rgba[i][gComp] = ((p >> 4) & 0xf) * gs;
- rgba[i][bComp] = ((p >> 8) & 0xf) * bs;
- rgba[i][aComp] = ((p >> 12) ) * as;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p ) & 0xf) * rs;
- rgba[i][gComp] = ((p >> 4) & 0xf) * gs;
- rgba[i][bComp] = ((p >> 8) & 0xf) * bs;
- rgba[i][aComp] = ((p >> 12) ) * as;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- if (!intFormat) {
- rs = gs = bs = 1.0F / 31.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p >> 11) ) * rs;
- rgba[i][gComp] = ((p >> 6) & 0x1f) * gs;
- rgba[i][bComp] = ((p >> 1) & 0x1f) * bs;
- rgba[i][aComp] = ((p ) & 0x1) * as;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p >> 11) ) * rs;
- rgba[i][gComp] = ((p >> 6) & 0x1f) * gs;
- rgba[i][bComp] = ((p >> 1) & 0x1f) * bs;
- rgba[i][aComp] = ((p ) & 0x1) * as;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (!intFormat) {
- rs = gs = bs = 1.0F / 31.0F;
- }
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p ) & 0x1f) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x1f) * gs;
- rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
- rgba[i][aComp] = ((p >> 15) ) * as;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p ) & 0x1f) * rs;
- rgba[i][gComp] = ((p >> 5) & 0x1f) * gs;
- rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
- rgba[i][aComp] = ((p >> 15) ) * as;
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- if (intFormat) {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = (GLfloat) ((p ) & 0xff);
- rgba[i][gComp] = (GLfloat) ((p >> 8) & 0xff);
- rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
- rgba[i][aComp] = (GLfloat) ((p >> 24) );
- }
- }
- else {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
- rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
- rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
- rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
- }
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- if (intFormat) {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = (GLfloat) ((p >> 24) );
- rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
- rgba[i][bComp] = (GLfloat) ((p >> 8) & 0xff);
- rgba[i][aComp] = (GLfloat) ((p ) & 0xff);
- }
- }
- else {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
- rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
- rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
- rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
- }
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- if (intFormat) {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = (GLfloat) ((p >> 24) );
- rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
- rgba[i][bComp] = (GLfloat) ((p >> 8) & 0xff);
- rgba[i][aComp] = (GLfloat) ((p ) & 0xff);
- }
- }
- else {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
- rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
- rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
- rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
- }
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- if (intFormat) {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = (GLfloat) ((p ) & 0xff);
- rgba[i][gComp] = (GLfloat) ((p >> 8) & 0xff);
- rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
- rgba[i][aComp] = (GLfloat) ((p >> 24) );
- }
- }
- else {
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
- rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
- rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
- rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
- }
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- if (!intFormat) {
- rs = 1.0F / 1023.0F;
- gs = 1.0F / 1023.0F;
- bs = 1.0F / 1023.0F;
- as = 1.0F / 3.0F;
- }
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- SWAP4BYTE(p);
- rgba[i][rComp] = ((p >> 22) ) * rs;
- rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
- rgba[i][bComp] = ((p >> 2) & 0x3ff) * bs;
- rgba[i][aComp] = ((p ) & 0x3 ) * as;
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = ((p >> 22) ) * rs;
- rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
- rgba[i][bComp] = ((p >> 2) & 0x3ff) * bs;
- rgba[i][aComp] = ((p ) & 0x3 ) * as;
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (!intFormat) {
- rs = 1.0F / 1023.0F;
- gs = 1.0F / 1023.0F;
- bs = 1.0F / 1023.0F;
- as = 1.0F / 3.0F;
- }
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- SWAP4BYTE(p);
- rgba[i][rComp] = ((p ) & 0x3ff) * rs;
- rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
- rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
- rgba[i][aComp] = ((p >> 30) ) * as;
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = ((p ) & 0x3ff) * rs;
- rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
- rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
- rgba[i][aComp] = ((p >> 30) ) * as;
- }
- }
- break;
- default:
- _mesa_problem(NULL, "bad srcType in extract float data");
- break;
- }
-}
-
-
-/*
- * Unpack a row of color image data from a client buffer according to
- * the pixel unpacking parameters.
- * Return GLchan values in the specified dest image format.
- * This is used by glDrawPixels and glTexImage?D().
- * \param ctx - the context
- * n - number of pixels in the span
- * dstFormat - format of destination color array
- * dest - the destination color array
- * srcFormat - source image format
- * srcType - source image data type
- * source - source image pointer
- * srcPacking - pixel unpacking parameters
- * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
- *
- * XXX perhaps expand this to process whole images someday.
- */
-void
-_mesa_unpack_color_span_chan( GLcontext *ctx,
- GLuint n, GLenum dstFormat, GLchan dest[],
- GLenum srcFormat, GLenum srcType,
- const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLbitfield transferOps )
-{
- ASSERT(dstFormat == GL_ALPHA ||
- dstFormat == GL_LUMINANCE ||
- dstFormat == GL_LUMINANCE_ALPHA ||
- dstFormat == GL_INTENSITY ||
- dstFormat == GL_RGB ||
- dstFormat == GL_RGBA ||
- dstFormat == GL_COLOR_INDEX);
-
- ASSERT(srcFormat == GL_RED ||
- srcFormat == GL_GREEN ||
- srcFormat == GL_BLUE ||
- srcFormat == GL_ALPHA ||
- srcFormat == GL_LUMINANCE ||
- srcFormat == GL_LUMINANCE_ALPHA ||
- srcFormat == GL_INTENSITY ||
- srcFormat == GL_RGB ||
- srcFormat == GL_BGR ||
- srcFormat == GL_RGBA ||
- srcFormat == GL_BGRA ||
- srcFormat == GL_ABGR_EXT ||
- srcFormat == GL_COLOR_INDEX);
-
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT ||
- srcType == GL_UNSIGNED_BYTE_3_3_2 ||
- srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
- srcType == GL_UNSIGNED_SHORT_5_6_5 ||
- srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
- srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- srcType == GL_UNSIGNED_INT_8_8_8_8 ||
- srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
- srcType == GL_UNSIGNED_INT_10_10_10_2 ||
- srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
- /* Try simple cases first */
- if (transferOps == 0) {
- if (srcType == CHAN_TYPE) {
- if (dstFormat == GL_RGBA) {
- if (srcFormat == GL_RGBA) {
- memcpy( dest, source, n * 4 * sizeof(GLchan) );
- return;
- }
- else if (srcFormat == GL_RGB) {
- GLuint i;
- const GLchan *src = (const GLchan *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- dst[3] = CHAN_MAX;
- src += 3;
- dst += 4;
- }
- return;
- }
- }
- else if (dstFormat == GL_RGB) {
- if (srcFormat == GL_RGB) {
- memcpy( dest, source, n * 3 * sizeof(GLchan) );
- return;
- }
- else if (srcFormat == GL_RGBA) {
- GLuint i;
- const GLchan *src = (const GLchan *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- src += 4;
- dst += 3;
- }
- return;
- }
- }
- else if (dstFormat == srcFormat) {
- GLint comps = _mesa_components_in_format(srcFormat);
- assert(comps > 0);
- memcpy( dest, source, n * comps * sizeof(GLchan) );
- return;
- }
- }
- /*
- * Common situation, loading 8bit RGBA/RGB source images
- * into 16/32 bit destination. (OSMesa16/32)
- */
- else if (srcType == GL_UNSIGNED_BYTE) {
- if (dstFormat == GL_RGBA) {
- if (srcFormat == GL_RGB) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = UBYTE_TO_CHAN(src[0]);
- dst[1] = UBYTE_TO_CHAN(src[1]);
- dst[2] = UBYTE_TO_CHAN(src[2]);
- dst[3] = CHAN_MAX;
- src += 3;
- dst += 4;
- }
- return;
- }
- else if (srcFormat == GL_RGBA) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = UBYTE_TO_CHAN(src[0]);
- dst[1] = UBYTE_TO_CHAN(src[1]);
- dst[2] = UBYTE_TO_CHAN(src[2]);
- dst[3] = UBYTE_TO_CHAN(src[3]);
- src += 4;
- dst += 4;
- }
- return;
- }
- }
- else if (dstFormat == GL_RGB) {
- if (srcFormat == GL_RGB) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = UBYTE_TO_CHAN(src[0]);
- dst[1] = UBYTE_TO_CHAN(src[1]);
- dst[2] = UBYTE_TO_CHAN(src[2]);
- src += 3;
- dst += 3;
- }
- return;
- }
- else if (srcFormat == GL_RGBA) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = UBYTE_TO_CHAN(src[0]);
- dst[1] = UBYTE_TO_CHAN(src[1]);
- dst[2] = UBYTE_TO_CHAN(src[2]);
- src += 4;
- dst += 3;
- }
- return;
- }
- }
- }
- }
-
-
- /* general solution begins here */
- {
- GLint dstComponents;
- GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
- GLint dstLuminanceIndex, dstIntensityIndex;
- GLfloat rgba[MAX_WIDTH][4];
-
- dstComponents = _mesa_components_in_format( dstFormat );
- /* source & dest image formats should have been error checked by now */
- assert(dstComponents > 0);
-
- /*
- * Extract image data and convert to RGBA floats
- */
- assert(n <= MAX_WIDTH);
- if (srcFormat == GL_COLOR_INDEX) {
- GLuint indexes[MAX_WIDTH];
- extract_uint_indexes(n, indexes, srcFormat, srcType, source,
- srcPacking);
-
- if (dstFormat == GL_COLOR_INDEX) {
- GLuint i;
- _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
- /* convert to GLchan and return */
- for (i = 0; i < n; i++) {
- dest[i] = (GLchan) (indexes[i] & 0xff);
- }
- return;
- }
- else {
- /* Convert indexes to RGBA */
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- shift_and_offset_ci(ctx, n, indexes);
- }
- _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
- }
-
- /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
- * with color indexes.
- */
- transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
- }
- else {
- /* non-color index data */
- extract_float_rgba(n, rgba, srcFormat, srcType, source,
- srcPacking->SwapBytes);
- }
-
- /* Need to clamp if returning GLubytes or GLushorts */
-#if CHAN_TYPE != GL_FLOAT
- transferOps |= IMAGE_CLAMP_BIT;
-#endif
-
- if (transferOps) {
- _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
- }
-
- /* Now determine which color channels we need to produce.
- * And determine the dest index (offset) within each color tuple.
- */
- switch (dstFormat) {
- case GL_ALPHA:
- dstAlphaIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE:
- dstLuminanceIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE_ALPHA:
- dstLuminanceIndex = 0;
- dstAlphaIndex = 1;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_INTENSITY:
- dstIntensityIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstLuminanceIndex = -1;
- break;
- case GL_RGB:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_RGBA:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = 3;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- default:
- _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
- return;
- }
-
-
- /* Now return the GLchan data in the requested dstFormat */
-
- if (dstRedIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- CLAMPED_FLOAT_TO_CHAN(dst[dstRedIndex], rgba[i][RCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstGreenIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- CLAMPED_FLOAT_TO_CHAN(dst[dstGreenIndex], rgba[i][GCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstBlueIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- CLAMPED_FLOAT_TO_CHAN(dst[dstBlueIndex], rgba[i][BCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstAlphaIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- CLAMPED_FLOAT_TO_CHAN(dst[dstAlphaIndex], rgba[i][ACOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstIntensityIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- assert(dstIntensityIndex == 0);
- assert(dstComponents == 1);
- for (i = 0; i < n; i++) {
- /* Intensity comes from red channel */
- CLAMPED_FLOAT_TO_CHAN(dst[i], rgba[i][RCOMP]);
- }
- }
-
- if (dstLuminanceIndex >= 0) {
- GLchan *dst = dest;
- GLuint i;
- assert(dstLuminanceIndex == 0);
- for (i = 0; i < n; i++) {
- /* Luminance comes from red channel */
- CLAMPED_FLOAT_TO_CHAN(dst[0], rgba[i][RCOMP]);
- dst += dstComponents;
- }
- }
- }
-}
-
-
-/**
- * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
- * instead of GLchan.
- */
-void
-_mesa_unpack_color_span_float( GLcontext *ctx,
- GLuint n, GLenum dstFormat, GLfloat dest[],
- GLenum srcFormat, GLenum srcType,
- const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLbitfield transferOps )
-{
- ASSERT(dstFormat == GL_ALPHA ||
- dstFormat == GL_LUMINANCE ||
- dstFormat == GL_LUMINANCE_ALPHA ||
- dstFormat == GL_INTENSITY ||
- dstFormat == GL_RGB ||
- dstFormat == GL_RGBA ||
- dstFormat == GL_COLOR_INDEX);
-
- ASSERT(srcFormat == GL_RED ||
- srcFormat == GL_GREEN ||
- srcFormat == GL_BLUE ||
- srcFormat == GL_ALPHA ||
- srcFormat == GL_LUMINANCE ||
- srcFormat == GL_LUMINANCE_ALPHA ||
- srcFormat == GL_INTENSITY ||
- srcFormat == GL_RGB ||
- srcFormat == GL_BGR ||
- srcFormat == GL_RGBA ||
- srcFormat == GL_BGRA ||
- srcFormat == GL_ABGR_EXT ||
- srcFormat == GL_RED_INTEGER_EXT ||
- srcFormat == GL_GREEN_INTEGER_EXT ||
- srcFormat == GL_BLUE_INTEGER_EXT ||
- srcFormat == GL_ALPHA_INTEGER_EXT ||
- srcFormat == GL_RGB_INTEGER_EXT ||
- srcFormat == GL_RGBA_INTEGER_EXT ||
- srcFormat == GL_BGR_INTEGER_EXT ||
- srcFormat == GL_BGRA_INTEGER_EXT ||
- srcFormat == GL_LUMINANCE_INTEGER_EXT ||
- srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT ||
- srcFormat == GL_COLOR_INDEX);
-
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT ||
- srcType == GL_UNSIGNED_BYTE_3_3_2 ||
- srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
- srcType == GL_UNSIGNED_SHORT_5_6_5 ||
- srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
- srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- srcType == GL_UNSIGNED_INT_8_8_8_8 ||
- srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
- srcType == GL_UNSIGNED_INT_10_10_10_2 ||
- srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
- /* general solution, no special cases, yet */
- {
- GLint dstComponents;
- GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
- GLint dstLuminanceIndex, dstIntensityIndex;
- GLfloat rgba[MAX_WIDTH][4];
-
- dstComponents = _mesa_components_in_format( dstFormat );
- /* source & dest image formats should have been error checked by now */
- assert(dstComponents > 0);
-
- /*
- * Extract image data and convert to RGBA floats
- */
- assert(n <= MAX_WIDTH);
- if (srcFormat == GL_COLOR_INDEX) {
- GLuint indexes[MAX_WIDTH];
- extract_uint_indexes(n, indexes, srcFormat, srcType, source,
- srcPacking);
-
- if (dstFormat == GL_COLOR_INDEX) {
- GLuint i;
- _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
- /* convert to GLchan and return */
- for (i = 0; i < n; i++) {
- dest[i] = (GLchan) (indexes[i] & 0xff);
- }
- return;
- }
- else {
- /* Convert indexes to RGBA */
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- shift_and_offset_ci(ctx, n, indexes);
- }
- _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
- }
-
- /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
- * with color indexes.
- */
- transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
- }
- else {
- /* non-color index data */
- extract_float_rgba(n, rgba, srcFormat, srcType, source,
- srcPacking->SwapBytes);
- }
-
- if (transferOps) {
- _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
- }
-
- /* Now determine which color channels we need to produce.
- * And determine the dest index (offset) within each color tuple.
- */
- switch (dstFormat) {
- case GL_ALPHA:
- dstAlphaIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE:
- dstLuminanceIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE_ALPHA:
- dstLuminanceIndex = 0;
- dstAlphaIndex = 1;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_INTENSITY:
- dstIntensityIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstLuminanceIndex = -1;
- break;
- case GL_RGB:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_RGBA:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = 3;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- default:
- _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()");
- return;
- }
-
- /* Now pack results in the requested dstFormat */
- if (dstRedIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstRedIndex] = rgba[i][RCOMP];
- dst += dstComponents;
- }
- }
-
- if (dstGreenIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstGreenIndex] = rgba[i][GCOMP];
- dst += dstComponents;
- }
- }
-
- if (dstBlueIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstBlueIndex] = rgba[i][BCOMP];
- dst += dstComponents;
- }
- }
-
- if (dstAlphaIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstAlphaIndex] = rgba[i][ACOMP];
- dst += dstComponents;
- }
- }
-
- if (dstIntensityIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- assert(dstIntensityIndex == 0);
- assert(dstComponents == 1);
- for (i = 0; i < n; i++) {
- /* Intensity comes from red channel */
- dst[i] = rgba[i][RCOMP];
- }
- }
-
- if (dstLuminanceIndex >= 0) {
- GLfloat *dst = dest;
- GLuint i;
- assert(dstLuminanceIndex == 0);
- for (i = 0; i < n; i++) {
- /* Luminance comes from red channel */
- dst[0] = rgba[i][RCOMP];
- dst += dstComponents;
- }
- }
- }
-}
-
-/**
- * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
- * directly return GLbyte data, no transfer ops apply.
- */
-void
-_mesa_unpack_dudv_span_byte( GLcontext *ctx,
- GLuint n, GLenum dstFormat, GLbyte dest[],
- GLenum srcFormat, GLenum srcType,
- const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLbitfield transferOps )
-{
- ASSERT(dstFormat == GL_DUDV_ATI);
- ASSERT(srcFormat == GL_DUDV_ATI);
-
- ASSERT(srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT);
-
- /* general solution */
- {
- GLint dstComponents;
- GLfloat rgba[MAX_WIDTH][4];
- GLbyte *dst = dest;
- GLuint i;
-
- dstComponents = _mesa_components_in_format( dstFormat );
- /* source & dest image formats should have been error checked by now */
- assert(dstComponents > 0);
-
- /*
- * Extract image data and convert to RGBA floats
- */
- assert(n <= MAX_WIDTH);
- extract_float_rgba(n, rgba, srcFormat, srcType, source,
- srcPacking->SwapBytes);
-
-
- /* Now determine which color channels we need to produce.
- * And determine the dest index (offset) within each color tuple.
- */
-
- /* Now pack results in the requested dstFormat */
- for (i = 0; i < n; i++) {
- /* not sure - need clamp[-1,1] here? */
- dst[0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
- dst[1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
- dst += dstComponents;
- }
- }
-}
-
-/*
- * Unpack a row of color index data from a client buffer according to
- * the pixel unpacking parameters.
- * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
- *
- * Args: ctx - the context
- * n - number of pixels
- * dstType - destination data type
- * dest - destination array
- * srcType - source pixel type
- * source - source data pointer
- * srcPacking - pixel unpacking parameters
- * transferOps - the pixel transfer operations to apply
- */
-void
-_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest,
- GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLbitfield transferOps )
-{
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT);
-
- ASSERT(dstType == GL_UNSIGNED_BYTE ||
- dstType == GL_UNSIGNED_SHORT ||
- dstType == GL_UNSIGNED_INT);
-
-
- transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
-
- /*
- * Try simple cases first
- */
- if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
- && dstType == GL_UNSIGNED_BYTE) {
- memcpy(dest, source, n * sizeof(GLubyte));
- }
- else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
- && dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
- memcpy(dest, source, n * sizeof(GLuint));
- }
- else {
- /*
- * general solution
- */
- GLuint indexes[MAX_WIDTH];
- assert(n <= MAX_WIDTH);
-
- extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
- srcPacking);
-
- if (transferOps)
- _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
-
- /* convert to dest type */
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLubyte) (indexes[i] & 0xff);
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLushort) (indexes[i] & 0xffff);
- }
- }
- break;
- case GL_UNSIGNED_INT:
- memcpy(dest, indexes, n * sizeof(GLuint));
- break;
- default:
- _mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
- }
- }
-}
-
-
-void
-_mesa_pack_index_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest, const GLuint *source,
- const struct gl_pixelstore_attrib *dstPacking,
- GLbitfield transferOps )
-{
- GLuint indexes[MAX_WIDTH];
-
- ASSERT(n <= MAX_WIDTH);
-
- transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
-
- if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
- /* make a copy of input */
- memcpy(indexes, source, n * sizeof(GLuint));
- _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
- source = indexes;
- }
-
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- *dst++ = (GLubyte) source[i];
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLbyte) source[i];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLushort) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLshort) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLuint) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLint) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLfloat) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLhalfARB *dst = (GLhalfARB *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = _mesa_float_to_half((GLfloat) source[i]);
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- default:
- _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
- }
-}
-
-
-/*
- * Unpack a row of stencil data from a client buffer according to
- * the pixel unpacking parameters.
- * This is (or will be) used by glDrawPixels
- *
- * Args: ctx - the context
- * n - number of pixels
- * dstType - destination data type
- * dest - destination array
- * srcType - source pixel type
- * source - source data pointer
- * srcPacking - pixel unpacking parameters
- * transferOps - apply offset/bias/lookup ops?
- */
-void
-_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest,
- GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLbitfield transferOps )
-{
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_UNSIGNED_INT_24_8_EXT ||
- srcType == GL_HALF_FLOAT_ARB ||
- srcType == GL_FLOAT);
-
- ASSERT(dstType == GL_UNSIGNED_BYTE ||
- dstType == GL_UNSIGNED_SHORT ||
- dstType == GL_UNSIGNED_INT);
-
- /* only shift and offset apply to stencil */
- transferOps &= IMAGE_SHIFT_OFFSET_BIT;
-
- /*
- * Try simple cases first
- */
- if (transferOps == 0 &&
- !ctx->Pixel.MapStencilFlag &&
- srcType == GL_UNSIGNED_BYTE &&
- dstType == GL_UNSIGNED_BYTE) {
- memcpy(dest, source, n * sizeof(GLubyte));
- }
- else if (transferOps == 0 &&
- !ctx->Pixel.MapStencilFlag &&
- srcType == GL_UNSIGNED_INT &&
- dstType == GL_UNSIGNED_INT &&
- !srcPacking->SwapBytes) {
- memcpy(dest, source, n * sizeof(GLuint));
- }
- else {
- /*
- * general solution
- */
- GLuint indexes[MAX_WIDTH];
- assert(n <= MAX_WIDTH);
-
- extract_uint_indexes(n, indexes, GL_STENCIL_INDEX, srcType, source,
- srcPacking);
-
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- /* shift and offset indexes */
- shift_and_offset_ci(ctx, n, indexes);
- }
-
- if (ctx->Pixel.MapStencilFlag) {
- /* Apply stencil lookup table */
- const GLuint mask = ctx->PixelMaps.StoS.Size - 1;
- GLuint i;
- for (i = 0; i < n; i++) {
- indexes[i] = (GLuint)ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
- }
- }
-
- /* convert to dest type */
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLubyte) (indexes[i] & 0xff);
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLushort) (indexes[i] & 0xffff);
- }
- }
- break;
- case GL_UNSIGNED_INT:
- memcpy(dest, indexes, n * sizeof(GLuint));
- break;
- default:
- _mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
- }
- }
-}
-
-
-void
-_mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest, const GLstencil *source,
- const struct gl_pixelstore_attrib *dstPacking )
-{
- GLstencil stencil[MAX_WIDTH];
-
- ASSERT(n <= MAX_WIDTH);
-
- if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
- ctx->Pixel.MapStencilFlag) {
- /* make a copy of input */
- memcpy(stencil, source, n * sizeof(GLstencil));
- _mesa_apply_stencil_transfer_ops(ctx, n, stencil);
- source = stencil;
- }
-
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- if (sizeof(GLstencil) == 1) {
- memcpy( dest, source, n );
- }
- else {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLubyte) source[i];
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLbyte) (source[i] & 0x7f);
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLushort) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLshort) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLuint) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLint) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = (GLfloat) source[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLhalfARB *dst = (GLhalfARB *) dest;
- GLuint i;
- for (i=0;i<n;i++) {
- dst[i] = _mesa_float_to_half( (float) source[i] );
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_BITMAP:
- if (dstPacking->LsbFirst) {
- GLubyte *dst = (GLubyte *) dest;
- GLint shift = 0;
- GLuint i;
- for (i = 0; i < n; i++) {
- if (shift == 0)
- *dst = 0;
- *dst |= ((source[i] != 0) << shift);
- shift++;
- if (shift == 8) {
- shift = 0;
- dst++;
- }
- }
- }
- else {
- GLubyte *dst = (GLubyte *) dest;
- GLint shift = 7;
- GLuint i;
- for (i = 0; i < n; i++) {
- if (shift == 7)
- *dst = 0;
- *dst |= ((source[i] != 0) << shift);
- shift--;
- if (shift < 0) {
- shift = 7;
- dst++;
- }
- }
- }
- break;
- default:
- _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
- }
-}
-
-#define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
- do { \
- GLuint i; \
- const GLTYPE *src = (const GLTYPE *)source; \
- for (i = 0; i < n; i++) { \
- GLTYPE value = src[i]; \
- if (srcPacking->SwapBytes) { \
- if (sizeof(GLTYPE) == 2) { \
- SWAP2BYTE(value); \
- } else if (sizeof(GLTYPE) == 4) { \
- SWAP4BYTE(value); \
- } \
- } \
- depthValues[i] = GLTYPE2FLOAT(value); \
- } \
- } while (0)
-
-
-/**
- * Unpack a row of depth/z values from memory, returning GLushort, GLuint
- * or GLfloat values.
- * The glPixelTransfer (scale/bias) params will be applied.
- *
- * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
- * \param depthMax max value for returned GLushort or GLuint values
- * (ignored for GLfloat).
- */
-void
-_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest, GLuint depthMax,
- GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking )
-{
- GLfloat depthTemp[MAX_WIDTH], *depthValues;
- GLboolean needClamp = GL_FALSE;
-
- /* Look for special cases first.
- * Not only are these faster, they're less prone to numeric conversion
- * problems. Otherwise, converting from an int type to a float then
- * back to an int type can introduce errors that will show up as
- * artifacts in things like depth peeling which uses glCopyTexImage.
- */
- if (ctx->Pixel.DepthScale == 1.0 && ctx->Pixel.DepthBias == 0.0) {
- if (srcType == GL_UNSIGNED_INT && dstType == GL_UNSIGNED_SHORT) {
- const GLuint *src = (const GLuint *) source;
- GLushort *dst = (GLushort *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = src[i] >> 16;
- }
- return;
- }
- if (srcType == GL_UNSIGNED_SHORT
- && dstType == GL_UNSIGNED_INT
- && depthMax == 0xffffffff) {
- const GLushort *src = (const GLushort *) source;
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = src[i] | (src[i] << 16);
- }
- return;
- }
- if (srcType == GL_UNSIGNED_INT_24_8
- && dstType == GL_UNSIGNED_INT
- && depthMax == 0xffffff) {
- const GLuint *src = (const GLuint *) source;
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = src[i] >> 8;
- }
- return;
- }
- /* XXX may want to add additional cases here someday */
- }
-
- /* general case path follows */
-
- if (dstType == GL_FLOAT) {
- depthValues = (GLfloat *) dest;
- }
- else {
- depthValues = depthTemp;
- }
-
- /* Convert incoming values to GLfloat. Some conversions will require
- * clamping, below.
- */
- switch (srcType) {
- case GL_BYTE:
- DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT);
- needClamp = GL_TRUE;
- break;
- case GL_UNSIGNED_BYTE:
- DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT);
- break;
- case GL_SHORT:
- DEPTH_VALUES(GLshort, SHORT_TO_FLOAT);
- needClamp = GL_TRUE;
- break;
- case GL_UNSIGNED_SHORT:
- DEPTH_VALUES(GLushort, USHORT_TO_FLOAT);
- break;
- case GL_INT:
- DEPTH_VALUES(GLint, INT_TO_FLOAT);
- needClamp = GL_TRUE;
- break;
- case GL_UNSIGNED_INT:
- DEPTH_VALUES(GLuint, UINT_TO_FLOAT);
- break;
- case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
- if (dstType == GL_UNSIGNED_INT_24_8_EXT &&
- depthMax == 0xffffff &&
- ctx->Pixel.DepthScale == 1.0 &&
- ctx->Pixel.DepthBias == 0.0) {
- const GLuint *src = (const GLuint *) source;
- GLuint *zValues = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- GLuint value = src[i];
- if (srcPacking->SwapBytes) {
- SWAP4BYTE(value);
- }
- zValues[i] = value & 0xffffff00;
- }
- return;
- }
- else {
- const GLuint *src = (const GLuint *) source;
- const GLfloat scale = 1.0f / 0xffffff;
- GLuint i;
- for (i = 0; i < n; i++) {
- GLuint value = src[i];
- if (srcPacking->SwapBytes) {
- SWAP4BYTE(value);
- }
- depthValues[i] = (value >> 8) * scale;
- }
- }
- break;
- case GL_FLOAT:
- DEPTH_VALUES(GLfloat, 1*);
- needClamp = GL_TRUE;
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLuint i;
- const GLhalfARB *src = (const GLhalfARB *) source;
- for (i = 0; i < n; i++) {
- GLhalfARB value = src[i];
- if (srcPacking->SwapBytes) {
- SWAP2BYTE(value);
- }
- depthValues[i] = _mesa_half_to_float(value);
- }
- needClamp = GL_TRUE;
- }
- break;
- default:
- _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
- return;
- }
-
- /* apply depth scale and bias */
- {
- const GLfloat scale = ctx->Pixel.DepthScale;
- const GLfloat bias = ctx->Pixel.DepthBias;
- if (scale != 1.0 || bias != 0.0) {
- GLuint i;
- for (i = 0; i < n; i++) {
- depthValues[i] = depthValues[i] * scale + bias;
- }
- needClamp = GL_TRUE;
- }
- }
-
- /* clamp to [0, 1] */
- if (needClamp) {
- GLuint i;
- for (i = 0; i < n; i++) {
- depthValues[i] = (GLfloat)CLAMP(depthValues[i], 0.0, 1.0);
- }
- }
-
- /*
- * Convert values to dstType
- */
- if (dstType == GL_UNSIGNED_INT) {
- GLuint *zValues = (GLuint *) dest;
- GLuint i;
- if (depthMax <= 0xffffff) {
- /* no overflow worries */
- for (i = 0; i < n; i++) {
- zValues[i] = (GLuint) (depthValues[i] * (GLfloat) depthMax);
- }
- }
- else {
- /* need to use double precision to prevent overflow problems */
- for (i = 0; i < n; i++) {
- GLdouble z = depthValues[i] * (GLfloat) depthMax;
- if (z >= (GLdouble) 0xffffffff)
- zValues[i] = 0xffffffff;
- else
- zValues[i] = (GLuint) z;
- }
- }
- }
- else if (dstType == GL_UNSIGNED_SHORT) {
- GLushort *zValues = (GLushort *) dest;
- GLuint i;
- ASSERT(depthMax <= 0xffff);
- for (i = 0; i < n; i++) {
- zValues[i] = (GLushort) (depthValues[i] * (GLfloat) depthMax);
- }
- }
- else {
- ASSERT(dstType == GL_FLOAT);
- /*ASSERT(depthMax == 1.0F);*/
- }
-}
-
-
-/*
- * Pack an array of depth values. The values are floats in [0,1].
- */
-void
-_mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
- GLenum dstType, const GLfloat *depthSpan,
- const struct gl_pixelstore_attrib *dstPacking )
-{
- GLfloat depthCopy[MAX_WIDTH];
-
- ASSERT(n <= MAX_WIDTH);
-
- if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
- memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
- _mesa_scale_and_bias_depth(ctx, n, depthCopy);
- depthSpan = depthCopy;
- }
-
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = FLOAT_TO_UBYTE( depthSpan[i] );
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = FLOAT_TO_BYTE( depthSpan[i] );
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- CLAMPED_FLOAT_TO_USHORT(dst[i], depthSpan[i]);
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = FLOAT_TO_SHORT( depthSpan[i] );
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = FLOAT_TO_UINT( depthSpan[i] );
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = FLOAT_TO_INT( depthSpan[i] );
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = depthSpan[i];
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n );
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- GLhalfARB *dst = (GLhalfARB *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = _mesa_float_to_half(depthSpan[i]);
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n );
- }
- }
- break;
- default:
- _mesa_problem(ctx, "bad type in _mesa_pack_depth_span");
- }
-}
-
-
-
-/**
- * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
- */
-void
-_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
- const GLfloat *depthVals,
- const GLstencil *stencilVals,
- const struct gl_pixelstore_attrib *dstPacking)
-{
- GLfloat depthCopy[MAX_WIDTH];
- GLstencil stencilCopy[MAX_WIDTH];
- GLuint i;
-
- ASSERT(n <= MAX_WIDTH);
-
- if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
- memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
- _mesa_scale_and_bias_depth(ctx, n, depthCopy);
- depthVals = depthCopy;
- }
-
- if (ctx->Pixel.IndexShift ||
- ctx->Pixel.IndexOffset ||
- ctx->Pixel.MapStencilFlag) {
- memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
- _mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy);
- stencilVals = stencilCopy;
- }
-
- for (i = 0; i < n; i++) {
- GLuint z = (GLuint) (depthVals[i] * 0xffffff);
- dest[i] = (z << 8) | (stencilVals[i] & 0xff);
- }
-
- if (dstPacking->SwapBytes) {
- _mesa_swap4(dest, n);
- }
-}
-
-
-
-
-/**
- * Unpack image data. Apply byte swapping, byte flipping (bitmap).
- * Return all image data in a contiguous block. This is used when we
- * compile glDrawPixels, glTexImage, etc into a display list. We
- * need a copy of the data in a standard format.
- */
-void *
-_mesa_unpack_image( GLuint dimensions,
- GLsizei width, GLsizei height, GLsizei depth,
- GLenum format, GLenum type, const GLvoid *pixels,
- const struct gl_pixelstore_attrib *unpack )
-{
- GLint bytesPerRow, compsPerRow;
- GLboolean flipBytes, swap2, swap4;
-
- if (!pixels)
- return NULL; /* not necessarily an error */
-
- if (width <= 0 || height <= 0 || depth <= 0)
- return NULL; /* generate error later */
-
- if (type == GL_BITMAP) {
- bytesPerRow = (width + 7) >> 3;
- flipBytes = unpack->LsbFirst;
- swap2 = swap4 = GL_FALSE;
- compsPerRow = 0;
- }
- else {
- const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
- GLint components = _mesa_components_in_format(format);
- GLint bytesPerComp;
-
- if (_mesa_type_is_packed(type))
- components = 1;
-
- if (bytesPerPixel <= 0 || components <= 0)
- return NULL; /* bad format or type. generate error later */
- bytesPerRow = bytesPerPixel * width;
- bytesPerComp = bytesPerPixel / components;
- flipBytes = GL_FALSE;
- swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
- swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
- compsPerRow = components * width;
- assert(compsPerRow >= width);
- }
-
- {
- GLubyte *destBuffer
- = (GLubyte *) malloc(bytesPerRow * height * depth);
- GLubyte *dst;
- GLint img, row;
- if (!destBuffer)
- return NULL; /* generate GL_OUT_OF_MEMORY later */
-
- dst = destBuffer;
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels,
- width, height, format, type, img, row, 0);
-
- if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
- GLint i;
- flipBytes = GL_FALSE;
- if (unpack->LsbFirst) {
- GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 128) {
- srcMask = 1;
- s++;
- }
- else {
- srcMask = srcMask << 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask >> 1;
- }
- }
- }
- else {
- GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 1) {
- srcMask = 128;
- s++;
- }
- else {
- srcMask = srcMask >> 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- }
- else {
- dstMask = dstMask >> 1;
- }
- }
- }
- }
- else {
- memcpy(dst, src, bytesPerRow);
- }
-
- /* byte flipping/swapping */
- if (flipBytes) {
- flip_bytes((GLubyte *) dst, bytesPerRow);
- }
- else if (swap2) {
- _mesa_swap2((GLushort*) dst, compsPerRow);
- }
- else if (swap4) {
- _mesa_swap4((GLuint*) dst, compsPerRow);
- }
- dst += bytesPerRow;
- }
- }
- return destBuffer;
- }
-}
-
-#endif /* _HAVE_FULL_GL */
-
-
-
-/**
- * Convert an array of RGBA colors from one datatype to another.
- * NOTE: src may equal dst. In that case, we use a temporary buffer.
- */
-void
-_mesa_convert_colors(GLenum srcType, const GLvoid *src,
- GLenum dstType, GLvoid *dst,
- GLuint count, const GLubyte mask[])
-{
- GLuint tempBuffer[MAX_WIDTH][4];
- const GLboolean useTemp = (src == dst);
-
- ASSERT(srcType != dstType);
-
- switch (srcType) {
- case GL_UNSIGNED_BYTE:
- if (dstType == GL_UNSIGNED_SHORT) {
- const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
- GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
- dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
- dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
- dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
- }
- else {
- const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
- GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- ASSERT(dstType == GL_FLOAT);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
- dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
- dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
- dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
- }
- break;
- case GL_UNSIGNED_SHORT:
- if (dstType == GL_UNSIGNED_BYTE) {
- const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
- GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
- dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
- dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
- dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
- }
- else {
- const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
- GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- ASSERT(dstType == GL_FLOAT);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
- dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
- dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
- dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
- }
- break;
- case GL_FLOAT:
- if (dstType == GL_UNSIGNED_BYTE) {
- const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
- GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
- UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
- UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
- UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
- }
- else {
- const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
- GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
- GLuint i;
- ASSERT(dstType == GL_UNSIGNED_SHORT);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
- UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
- UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
- UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
- }
- }
- if (useTemp)
- memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
- }
- break;
- default:
- _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
- }
-}
-
-
-
-
-/**
- * Perform basic clipping for glDrawPixels. The image's position and size
- * and the unpack SkipPixels and SkipRows are adjusted so that the image
- * region is entirely within the window and scissor bounds.
- * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
- * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
- * we'll actually write. Beforehand, *destY-1 is the first drawing row.
- *
- * \return GL_TRUE if image is ready for drawing or
- * GL_FALSE if image was completely clipped away (draw nothing)
- */
-GLboolean
-_mesa_clip_drawpixels(const GLcontext *ctx,
- GLint *destX, GLint *destY,
- GLsizei *width, GLsizei *height,
- struct gl_pixelstore_attrib *unpack)
-{
- const GLframebuffer *buffer = ctx->DrawBuffer;
-
- if (unpack->RowLength == 0) {
- unpack->RowLength = *width;
- }
-
- ASSERT(ctx->Pixel.ZoomX == 1.0F);
- ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
-
- /* left clipping */
- if (*destX < buffer->_Xmin) {
- unpack->SkipPixels += (buffer->_Xmin - *destX);
- *width -= (buffer->_Xmin - *destX);
- *destX = buffer->_Xmin;
- }
- /* right clipping */
- if (*destX + *width > buffer->_Xmax)
- *width -= (*destX + *width - buffer->_Xmax);
-
- if (*width <= 0)
- return GL_FALSE;
-
- if (ctx->Pixel.ZoomY == 1.0F) {
- /* bottom clipping */
- if (*destY < buffer->_Ymin) {
- unpack->SkipRows += (buffer->_Ymin - *destY);
- *height -= (buffer->_Ymin - *destY);
- *destY = buffer->_Ymin;
- }
- /* top clipping */
- if (*destY + *height > buffer->_Ymax)
- *height -= (*destY + *height - buffer->_Ymax);
- }
- else { /* upside down */
- /* top clipping */
- if (*destY > buffer->_Ymax) {
- unpack->SkipRows += (*destY - buffer->_Ymax);
- *height -= (*destY - buffer->_Ymax);
- *destY = buffer->_Ymax;
- }
- /* bottom clipping */
- if (*destY - *height < buffer->_Ymin)
- *height -= (buffer->_Ymin - (*destY - *height));
- /* adjust destY so it's the first row to write to */
- (*destY)--;
- }
-
- if (*height <= 0)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-
-/**
- * Perform clipping for glReadPixels. The image's window position
- * and size, and the pack skipPixels, skipRows and rowLength are adjusted
- * so that the image region is entirely within the window bounds.
- * Note: this is different from _mesa_clip_drawpixels() in that the
- * scissor box is ignored, and we use the bounds of the current readbuffer
- * surface.
- *
- * \return GL_TRUE if image is ready for drawing or
- * GL_FALSE if image was completely clipped away (draw nothing)
- */
-GLboolean
-_mesa_clip_readpixels(const GLcontext *ctx,
- GLint *srcX, GLint *srcY,
- GLsizei *width, GLsizei *height,
- struct gl_pixelstore_attrib *pack)
-{
- const GLframebuffer *buffer = ctx->ReadBuffer;
-
- if (pack->RowLength == 0) {
- pack->RowLength = *width;
- }
-
- /* left clipping */
- if (*srcX < 0) {
- pack->SkipPixels += (0 - *srcX);
- *width -= (0 - *srcX);
- *srcX = 0;
- }
- /* right clipping */
- if (*srcX + *width > (GLsizei) buffer->Width)
- *width -= (*srcX + *width - buffer->Width);
-
- if (*width <= 0)
- return GL_FALSE;
-
- /* bottom clipping */
- if (*srcY < 0) {
- pack->SkipRows += (0 - *srcY);
- *height -= (0 - *srcY);
- *srcY = 0;
- }
- /* top clipping */
- if (*srcY + *height > (GLsizei) buffer->Height)
- *height -= (*srcY + *height - buffer->Height);
-
- if (*height <= 0)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-
-/**
- * Do clipping for a glCopyTexSubImage call.
- * The framebuffer source region might extend outside the framebuffer
- * bounds. Clip the source region against the framebuffer bounds and
- * adjust the texture/dest position and size accordingly.
- *
- * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
- */
-GLboolean
-_mesa_clip_copytexsubimage(const GLcontext *ctx,
- GLint *destX, GLint *destY,
- GLint *srcX, GLint *srcY,
- GLsizei *width, GLsizei *height)
-{
- const struct gl_framebuffer *fb = ctx->ReadBuffer;
- const GLint srcX0 = *srcX, srcY0 = *srcY;
-
- if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
- srcX, srcY, width, height)) {
- *destX = *destX + *srcX - srcX0;
- *destY = *destY + *srcY - srcY0;
-
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
-}
-
-
-
-/**
- * Clip the rectangle defined by (x, y, width, height) against the bounds
- * specified by [xmin, xmax) and [ymin, ymax).
- * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
- */
-GLboolean
-_mesa_clip_to_region(GLint xmin, GLint ymin,
- GLint xmax, GLint ymax,
- GLint *x, GLint *y,
- GLsizei *width, GLsizei *height )
-{
- /* left clipping */
- if (*x < xmin) {
- *width -= (xmin - *x);
- *x = xmin;
- }
-
- /* right clipping */
- if (*x + *width > xmax)
- *width -= (*x + *width - xmax);
-
- if (*width <= 0)
- return GL_FALSE;
-
- /* bottom (or top) clipping */
- if (*y < ymin) {
- *height -= (ymin - *y);
- *y = ymin;
- }
-
- /* top (or bottom) clipping */
- if (*y + *height > ymax)
- *height -= (*y + *height - ymax);
-
- if (*height <= 0)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-
-/**
- * Clip dst coords against Xmax (or Ymax).
- */
-static INLINE void
-clip_right_or_top(GLint *srcX0, GLint *srcX1,
- GLint *dstX0, GLint *dstX1,
- GLint maxValue)
-{
- GLfloat t, bias;
-
- if (*dstX1 > maxValue) {
- /* X1 outside right edge */
- ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */
- t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
- /* chop off [t, 1] part */
- ASSERT(t >= 0.0 && t <= 1.0);
- *dstX1 = maxValue;
- bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
- *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
- }
- else if (*dstX0 > maxValue) {
- /* X0 outside right edge */
- ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */
- t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
- /* chop off [t, 1] part */
- ASSERT(t >= 0.0 && t <= 1.0);
- *dstX0 = maxValue;
- bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;
- *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
- }
-}
-
-
-/**
- * Clip dst coords against Xmin (or Ymin).
- */
-static INLINE void
-clip_left_or_bottom(GLint *srcX0, GLint *srcX1,
- GLint *dstX0, GLint *dstX1,
- GLint minValue)
-{
- GLfloat t, bias;
-
- if (*dstX0 < minValue) {
- /* X0 outside left edge */
- ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */
- t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
- /* chop off [0, t] part */
- ASSERT(t >= 0.0 && t <= 1.0);
- *dstX0 = minValue;
- bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */
- *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
- }
- else if (*dstX1 < minValue) {
- /* X1 outside left edge */
- ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */
- t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
- /* chop off [0, t] part */
- ASSERT(t >= 0.0 && t <= 1.0);
- *dstX1 = minValue;
- bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
- *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
- }
-}
-
-
-/**
- * Do clipping of blit src/dest rectangles.
- * The dest rect is clipped against both the buffer bounds and scissor bounds.
- * The src rect is just clipped against the buffer bounds.
- *
- * When either the src or dest rect is clipped, the other is also clipped
- * proportionately!
- *
- * Note that X0 need not be less than X1 (same for Y) for either the source
- * and dest rects. That makes the clipping a little trickier.
- *
- * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
- */
-GLboolean
-_mesa_clip_blit(GLcontext *ctx,
- GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,
- GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)
-{
- const GLint srcXmin = 0;
- const GLint srcXmax = ctx->ReadBuffer->Width;
- const GLint srcYmin = 0;
- const GLint srcYmax = ctx->ReadBuffer->Height;
-
- /* these include scissor bounds */
- const GLint dstXmin = ctx->DrawBuffer->_Xmin;
- const GLint dstXmax = ctx->DrawBuffer->_Xmax;
- const GLint dstYmin = ctx->DrawBuffer->_Ymin;
- const GLint dstYmax = ctx->DrawBuffer->_Ymax;
-
- /*
- printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
- *srcX0, *srcX1, *dstX0, *dstX1);
- printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
- *srcY0, *srcY1, *dstY0, *dstY1);
- */
-
- /* trivial rejection tests */
- if (*dstX0 == *dstX1)
- return GL_FALSE; /* no width */
- if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)
- return GL_FALSE; /* totally out (left) of bounds */
- if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)
- return GL_FALSE; /* totally out (right) of bounds */
-
- if (*dstY0 == *dstY1)
- return GL_FALSE;
- if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)
- return GL_FALSE;
- if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)
- return GL_FALSE;
-
- if (*srcX0 == *srcX1)
- return GL_FALSE;
- if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)
- return GL_FALSE;
- if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)
- return GL_FALSE;
-
- if (*srcY0 == *srcY1)
- return GL_FALSE;
- if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)
- return GL_FALSE;
- if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)
- return GL_FALSE;
-
- /*
- * dest clip
- */
- clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);
- clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);
- clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);
- clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);
-
- /*
- * src clip (just swap src/dst values from above)
- */
- clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);
- clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);
- clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);
- clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);
-
- /*
- printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
- *srcX0, *srcX1, *dstX0, *dstX1);
- printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
- *srcY0, *srcY1, *dstY0, *dstY1);
- */
-
- ASSERT(*dstX0 >= dstXmin);
- ASSERT(*dstX0 <= dstXmax);
- ASSERT(*dstX1 >= dstXmin);
- ASSERT(*dstX1 <= dstXmax);
-
- ASSERT(*dstY0 >= dstYmin);
- ASSERT(*dstY0 <= dstYmax);
- ASSERT(*dstY1 >= dstYmin);
- ASSERT(*dstY1 <= dstYmax);
-
- ASSERT(*srcX0 >= srcXmin);
- ASSERT(*srcX0 <= srcXmax);
- ASSERT(*srcX1 >= srcXmin);
- ASSERT(*srcX1 <= srcXmax);
-
- ASSERT(*srcY0 >= srcYmin);
- ASSERT(*srcY0 <= srcYmax);
- ASSERT(*srcY1 >= srcYmin);
- ASSERT(*srcY1 <= srcYmax);
-
- return GL_TRUE;
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file image.c
+ * Image handling.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "image.h"
+#include "imports.h"
+#include "macros.h"
+
+
+/**
+ * NOTE:
+ * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when
+ * we later convert the float to a packed integer value (such as for
+ * GL_RGB5_A1) because we'll wind up with a non-zero value.
+ *
+ * We redefine the macros here so zero is handled correctly.
+ */
+#undef BYTE_TO_FLOAT
+#define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
+
+#undef SHORT_TO_FLOAT
+#define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
+
+
+
+/** Compute ceiling of integer quotient of A divided by B. */
+#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
+
+
+/**
+ * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
+ */
+GLboolean
+_mesa_type_is_packed(GLenum type)
+{
+ switch (type) {
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ case GL_UNSIGNED_INT_24_8_EXT:
+ return GL_TRUE;
+ }
+
+ return GL_FALSE;
+}
+
+
+
+/**
+ * Flip the order of the 2 bytes in each word in the given array.
+ *
+ * \param p array.
+ * \param n number of words.
+ */
+void
+_mesa_swap2( GLushort *p, GLuint n )
+{
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
+ }
+}
+
+
+
+/*
+ * Flip the order of the 4 bytes in each word in the given array.
+ */
+void
+_mesa_swap4( GLuint *p, GLuint n )
+{
+ GLuint i, a, b;
+ for (i = 0; i < n; i++) {
+ b = p[i];
+ a = (b >> 24)
+ | ((b >> 8) & 0xff00)
+ | ((b << 8) & 0xff0000)
+ | ((b << 24) & 0xff000000);
+ p[i] = a;
+ }
+}
+
+
+/**
+ * Get the size of a GL data type.
+ *
+ * \param type GL data type.
+ *
+ * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
+ * if an invalid type enum.
+ */
+GLint
+_mesa_sizeof_type( GLenum type )
+{
+ switch (type) {
+ case GL_BITMAP:
+ return 0;
+ case GL_UNSIGNED_BYTE:
+ return sizeof(GLubyte);
+ case GL_BYTE:
+ return sizeof(GLbyte);
+ case GL_UNSIGNED_SHORT:
+ return sizeof(GLushort);
+ case GL_SHORT:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_INT:
+ return sizeof(GLuint);
+ case GL_INT:
+ return sizeof(GLint);
+ case GL_FLOAT:
+ return sizeof(GLfloat);
+ case GL_DOUBLE:
+ return sizeof(GLdouble);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
+ case GL_FIXED:
+ return sizeof(GLfixed);
+ default:
+ return -1;
+ }
+}
+
+
+/**
+ * Same as _mesa_sizeof_type() but also accepting the packed pixel
+ * format data types.
+ */
+GLint
+_mesa_sizeof_packed_type( GLenum type )
+{
+ switch (type) {
+ case GL_BITMAP:
+ return 0;
+ case GL_UNSIGNED_BYTE:
+ return sizeof(GLubyte);
+ case GL_BYTE:
+ return sizeof(GLbyte);
+ case GL_UNSIGNED_SHORT:
+ return sizeof(GLushort);
+ case GL_SHORT:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_INT:
+ return sizeof(GLuint);
+ case GL_INT:
+ return sizeof(GLint);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
+ case GL_FLOAT:
+ return sizeof(GLfloat);
+ case GL_UNSIGNED_BYTE_3_3_2:
+ return sizeof(GLubyte);
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ return sizeof(GLubyte);
+ case GL_UNSIGNED_SHORT_5_6_5:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_INT_8_8_8_8:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_10_10_10_2:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_INT_24_8_EXT:
+ return sizeof(GLuint);
+ default:
+ return -1;
+ }
+}
+
+
+/**
+ * Get the number of components in a pixel format.
+ *
+ * \param format pixel format.
+ *
+ * \return the number of components in the given format, or -1 if a bad format.
+ */
+GLint
+_mesa_components_in_format( GLenum format )
+{
+ switch (format) {
+ case GL_COLOR_INDEX:
+ case GL_COLOR_INDEX1_EXT:
+ case GL_COLOR_INDEX2_EXT:
+ case GL_COLOR_INDEX4_EXT:
+ case GL_COLOR_INDEX8_EXT:
+ case GL_COLOR_INDEX12_EXT:
+ case GL_COLOR_INDEX16_EXT:
+ case GL_STENCIL_INDEX:
+ case GL_DEPTH_COMPONENT:
+ case GL_RED:
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA:
+ case GL_ALPHA_INTEGER_EXT:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_INTENSITY:
+ return 1;
+ case GL_LUMINANCE_ALPHA:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ case GL_RG:
+ return 2;
+ case GL_RGB:
+ case GL_RGB_INTEGER_EXT:
+ return 3;
+ case GL_RGBA:
+ case GL_RGBA_INTEGER_EXT:
+ return 4;
+ case GL_BGR:
+ return 3;
+ case GL_BGRA:
+ return 4;
+ case GL_ABGR_EXT:
+ return 4;
+ case GL_YCBCR_MESA:
+ return 2;
+ case GL_DEPTH_STENCIL_EXT:
+ return 2;
+ case GL_DUDV_ATI:
+ case GL_DU8DV8_ATI:
+ return 2;
+ default:
+ return -1;
+ }
+}
+
+
+/**
+ * Get the bytes per pixel of pixel format type pair.
+ *
+ * \param format pixel format.
+ * \param type pixel type.
+ *
+ * \return bytes per pixel, or -1 if a bad format or type was given.
+ */
+GLint
+_mesa_bytes_per_pixel( GLenum format, GLenum type )
+{
+ GLint comps = _mesa_components_in_format( format );
+ if (comps < 0)
+ return -1;
+
+ switch (type) {
+ case GL_BITMAP:
+ return 0; /* special case */
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ return comps * sizeof(GLubyte);
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ return comps * sizeof(GLshort);
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ return comps * sizeof(GLint);
+ case GL_FLOAT:
+ return comps * sizeof(GLfloat);
+ case GL_HALF_FLOAT_ARB:
+ return comps * sizeof(GLhalfARB);
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ if (format == GL_RGB || format == GL_BGR ||
+ format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
+ return sizeof(GLubyte);
+ else
+ return -1; /* error */
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ if (format == GL_RGB || format == GL_BGR ||
+ format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
+ return sizeof(GLushort);
+ else
+ return -1; /* error */
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
+ format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
+ return sizeof(GLushort);
+ else
+ return -1;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
+ format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
+ return sizeof(GLuint);
+ else
+ return -1;
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ if (format == GL_YCBCR_MESA)
+ return sizeof(GLushort);
+ else
+ return -1;
+ case GL_UNSIGNED_INT_24_8_EXT:
+ if (format == GL_DEPTH_STENCIL_EXT)
+ return sizeof(GLuint);
+ else
+ return -1;
+ default:
+ return -1;
+ }
+}
+
+
+/**
+ * Test for a legal pixel format and type.
+ *
+ * \param format pixel format.
+ * \param type pixel type.
+ *
+ * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
+ * otherwise.
+ */
+GLboolean
+_mesa_is_legal_format_and_type(const struct gl_context *ctx,
+ GLenum format, GLenum type)
+{
+ switch (format) {
+ case GL_COLOR_INDEX:
+ case GL_STENCIL_INDEX:
+ switch (type) {
+ case GL_BITMAP:
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+#if 0 /* not legal! see table 3.6 of the 1.5 spec */
+ case GL_INTENSITY:
+#endif
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_DEPTH_COMPONENT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_RG:
+ if (!ctx->Extensions.ARB_texture_rg)
+ return GL_FALSE;
+
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_RGB:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_BGR:
+ switch (type) {
+ /* NOTE: no packed types are supported with BGR. That's
+ * intentional, according to the GL spec.
+ */
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_ABGR_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_YCBCR_MESA:
+ if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
+ type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+ case GL_DEPTH_STENCIL_EXT:
+ if (ctx->Extensions.EXT_packed_depth_stencil
+ && type == GL_UNSIGNED_INT_24_8_EXT)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+ case GL_DUDV_ATI:
+ case GL_DU8DV8_ATI:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+
+ /* integer-valued formats */
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA_INTEGER_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ return ctx->Extensions.EXT_texture_integer;
+ default:
+ return GL_FALSE;
+ }
+
+ case GL_RGB_INTEGER_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return ctx->Extensions.EXT_texture_integer;
+ default:
+ return GL_FALSE;
+ }
+
+ case GL_BGR_INTEGER_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ /* NOTE: no packed formats w/ BGR format */
+ return ctx->Extensions.EXT_texture_integer;
+ default:
+ return GL_FALSE;
+ }
+
+ case GL_RGBA_INTEGER_EXT:
+ case GL_BGRA_INTEGER_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ return ctx->Extensions.EXT_texture_integer;
+ default:
+ return GL_FALSE;
+ }
+
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ switch (type) {
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ return ctx->Extensions.EXT_texture_integer;
+ default:
+ return GL_FALSE;
+ }
+
+ default:
+ ; /* fall-through */
+ }
+ return GL_FALSE;
+}
+
+
+/**
+ * Test if the given image format is a color/RGBA format (i.e., not color
+ * index, depth, stencil, etc).
+ * \param format the image format value (may by an internal texture format)
+ * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
+ */
+GLboolean
+_mesa_is_color_format(GLenum format)
+{
+ switch (format) {
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_ALPHA4:
+ case GL_ALPHA8:
+ case GL_ALPHA12:
+ case GL_ALPHA16:
+ case 1:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE4:
+ case GL_LUMINANCE8:
+ case GL_LUMINANCE12:
+ case GL_LUMINANCE16:
+ case 2:
+ case GL_LUMINANCE_ALPHA:
+ case GL_LUMINANCE4_ALPHA4:
+ case GL_LUMINANCE6_ALPHA2:
+ case GL_LUMINANCE8_ALPHA8:
+ case GL_LUMINANCE12_ALPHA4:
+ case GL_LUMINANCE12_ALPHA12:
+ case GL_LUMINANCE16_ALPHA16:
+ case GL_INTENSITY:
+ case GL_INTENSITY4:
+ case GL_INTENSITY8:
+ case GL_INTENSITY12:
+ case GL_INTENSITY16:
+ case GL_R8:
+ case GL_R16:
+ case GL_RG:
+ case GL_RG8:
+ case GL_RG16:
+ case 3:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_R3_G3_B2:
+ case GL_RGB4:
+ case GL_RGB5:
+ case GL_RGB8:
+ case GL_RGB10:
+ case GL_RGB12:
+ case GL_RGB16:
+ case 4:
+ case GL_ABGR_EXT:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_RGBA2:
+ case GL_RGBA4:
+ case GL_RGB5_A1:
+ case GL_RGBA8:
+ case GL_RGB10_A2:
+ case GL_RGBA12:
+ case GL_RGBA16:
+ /* float texture formats */
+ case GL_ALPHA16F_ARB:
+ case GL_ALPHA32F_ARB:
+ case GL_LUMINANCE16F_ARB:
+ case GL_LUMINANCE32F_ARB:
+ case GL_LUMINANCE_ALPHA16F_ARB:
+ case GL_LUMINANCE_ALPHA32F_ARB:
+ case GL_INTENSITY16F_ARB:
+ case GL_INTENSITY32F_ARB:
+ case GL_R16F:
+ case GL_R32F:
+ case GL_RG16F:
+ case GL_RG32F:
+ case GL_RGB16F_ARB:
+ case GL_RGB32F_ARB:
+ case GL_RGBA16F_ARB:
+ case GL_RGBA32F_ARB:
+ /* compressed formats */
+ case GL_COMPRESSED_ALPHA:
+ case GL_COMPRESSED_LUMINANCE:
+ case GL_COMPRESSED_LUMINANCE_ALPHA:
+ case GL_COMPRESSED_INTENSITY:
+ case GL_COMPRESSED_RED:
+ case GL_COMPRESSED_RG:
+ case GL_COMPRESSED_RGB:
+ case GL_COMPRESSED_RGBA:
+ case GL_RGB_S3TC:
+ case GL_RGB4_S3TC:
+ case GL_RGBA_S3TC:
+ case GL_RGBA4_S3TC:
+ case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+#if FEATURE_EXT_texture_sRGB
+ case GL_SRGB_EXT:
+ case GL_SRGB8_EXT:
+ case GL_SRGB_ALPHA_EXT:
+ case GL_SRGB8_ALPHA8_EXT:
+ case GL_SLUMINANCE_ALPHA_EXT:
+ case GL_SLUMINANCE8_ALPHA8_EXT:
+ case GL_SLUMINANCE_EXT:
+ case GL_SLUMINANCE8_EXT:
+ case GL_COMPRESSED_SRGB_EXT:
+ case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+ case GL_COMPRESSED_SLUMINANCE_EXT:
+ case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
+#endif /* FEATURE_EXT_texture_sRGB */
+ case GL_COMPRESSED_RED_RGTC1:
+ case GL_COMPRESSED_SIGNED_RED_RGTC1:
+ case GL_COMPRESSED_RG_RGTC2:
+ case GL_COMPRESSED_SIGNED_RG_RGTC2:
+ /* signed, normalized texture formats */
+ case GL_RGBA_SNORM:
+ case GL_RGBA8_SNORM:
+ /* generic integer formats */
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA_INTEGER_EXT:
+ case GL_RGB_INTEGER_EXT:
+ case GL_RGBA_INTEGER_EXT:
+ case GL_BGR_INTEGER_EXT:
+ case GL_BGRA_INTEGER_EXT:
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ /* sized integer formats */
+ case GL_RGBA32UI_EXT:
+ case GL_RGB32UI_EXT:
+ case GL_ALPHA32UI_EXT:
+ case GL_INTENSITY32UI_EXT:
+ case GL_LUMINANCE32UI_EXT:
+ case GL_LUMINANCE_ALPHA32UI_EXT:
+ case GL_RGBA16UI_EXT:
+ case GL_RGB16UI_EXT:
+ case GL_ALPHA16UI_EXT:
+ case GL_INTENSITY16UI_EXT:
+ case GL_LUMINANCE16UI_EXT:
+ case GL_LUMINANCE_ALPHA16UI_EXT:
+ case GL_RGBA8UI_EXT:
+ case GL_RGB8UI_EXT:
+ case GL_ALPHA8UI_EXT:
+ case GL_INTENSITY8UI_EXT:
+ case GL_LUMINANCE8UI_EXT:
+ case GL_LUMINANCE_ALPHA8UI_EXT:
+ case GL_RGBA32I_EXT:
+ case GL_RGB32I_EXT:
+ case GL_ALPHA32I_EXT:
+ case GL_INTENSITY32I_EXT:
+ case GL_LUMINANCE32I_EXT:
+ case GL_LUMINANCE_ALPHA32I_EXT:
+ case GL_RGBA16I_EXT:
+ case GL_RGB16I_EXT:
+ case GL_ALPHA16I_EXT:
+ case GL_INTENSITY16I_EXT:
+ case GL_LUMINANCE16I_EXT:
+ case GL_LUMINANCE_ALPHA16I_EXT:
+ case GL_RGBA8I_EXT:
+ case GL_RGB8I_EXT:
+ case GL_ALPHA8I_EXT:
+ case GL_INTENSITY8I_EXT:
+ case GL_LUMINANCE8I_EXT:
+ case GL_LUMINANCE_ALPHA8I_EXT:
+ return GL_TRUE;
+ case GL_YCBCR_MESA: /* not considered to be RGB */
+ /* fall-through */
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a color index format.
+ */
+GLboolean
+_mesa_is_index_format(GLenum format)
+{
+ switch (format) {
+ case GL_COLOR_INDEX:
+ case GL_COLOR_INDEX1_EXT:
+ case GL_COLOR_INDEX2_EXT:
+ case GL_COLOR_INDEX4_EXT:
+ case GL_COLOR_INDEX8_EXT:
+ case GL_COLOR_INDEX12_EXT:
+ case GL_COLOR_INDEX16_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a depth component format.
+ */
+GLboolean
+_mesa_is_depth_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16:
+ case GL_DEPTH_COMPONENT24:
+ case GL_DEPTH_COMPONENT32:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a stencil format.
+ */
+GLboolean
+_mesa_is_stencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ case GL_DEPTH_STENCIL:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a YCbCr format.
+ */
+GLboolean
+_mesa_is_ycbcr_format(GLenum format)
+{
+ switch (format) {
+ case GL_YCBCR_MESA:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a depth+stencil format.
+ */
+GLboolean
+_mesa_is_depthstencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH24_STENCIL8_EXT:
+ case GL_DEPTH_STENCIL_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a depth or stencil format.
+ */
+GLboolean
+_mesa_is_depth_or_stencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16:
+ case GL_DEPTH_COMPONENT24:
+ case GL_DEPTH_COMPONENT32:
+ case GL_STENCIL_INDEX:
+ case GL_STENCIL_INDEX1_EXT:
+ case GL_STENCIL_INDEX4_EXT:
+ case GL_STENCIL_INDEX8_EXT:
+ case GL_STENCIL_INDEX16_EXT:
+ case GL_DEPTH_STENCIL_EXT:
+ case GL_DEPTH24_STENCIL8_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a dudv format.
+ */
+GLboolean
+_mesa_is_dudv_format(GLenum format)
+{
+ switch (format) {
+ case GL_DUDV_ATI:
+ case GL_DU8DV8_ATI:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given format is an integer (non-normalized) format.
+ */
+GLboolean
+_mesa_is_integer_format(GLenum format)
+{
+ switch (format) {
+ /* generic integer formats */
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA_INTEGER_EXT:
+ case GL_RGB_INTEGER_EXT:
+ case GL_RGBA_INTEGER_EXT:
+ case GL_BGR_INTEGER_EXT:
+ case GL_BGRA_INTEGER_EXT:
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ /* specific integer formats */
+ case GL_RGBA32UI_EXT:
+ case GL_RGB32UI_EXT:
+ case GL_ALPHA32UI_EXT:
+ case GL_INTENSITY32UI_EXT:
+ case GL_LUMINANCE32UI_EXT:
+ case GL_LUMINANCE_ALPHA32UI_EXT:
+ case GL_RGBA16UI_EXT:
+ case GL_RGB16UI_EXT:
+ case GL_ALPHA16UI_EXT:
+ case GL_INTENSITY16UI_EXT:
+ case GL_LUMINANCE16UI_EXT:
+ case GL_LUMINANCE_ALPHA16UI_EXT:
+ case GL_RGBA8UI_EXT:
+ case GL_RGB8UI_EXT:
+ case GL_ALPHA8UI_EXT:
+ case GL_INTENSITY8UI_EXT:
+ case GL_LUMINANCE8UI_EXT:
+ case GL_LUMINANCE_ALPHA8UI_EXT:
+ case GL_RGBA32I_EXT:
+ case GL_RGB32I_EXT:
+ case GL_ALPHA32I_EXT:
+ case GL_INTENSITY32I_EXT:
+ case GL_LUMINANCE32I_EXT:
+ case GL_LUMINANCE_ALPHA32I_EXT:
+ case GL_RGBA16I_EXT:
+ case GL_RGB16I_EXT:
+ case GL_ALPHA16I_EXT:
+ case GL_INTENSITY16I_EXT:
+ case GL_LUMINANCE16I_EXT:
+ case GL_LUMINANCE_ALPHA16I_EXT:
+ case GL_RGBA8I_EXT:
+ case GL_RGB8I_EXT:
+ case GL_ALPHA8I_EXT:
+ case GL_INTENSITY8I_EXT:
+ case GL_LUMINANCE8I_EXT:
+ case GL_LUMINANCE_ALPHA8I_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if an image format is a supported compressed format.
+ * \param format the internal format token provided by the user.
+ * \return GL_TRUE if compressed, GL_FALSE if uncompressed
+ */
+GLboolean
+_mesa_is_compressed_format(struct gl_context *ctx, GLenum format)
+{
+ switch (format) {
+ case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+ return ctx->Extensions.EXT_texture_compression_s3tc;
+ case GL_RGB_S3TC:
+ case GL_RGB4_S3TC:
+ case GL_RGBA_S3TC:
+ case GL_RGBA4_S3TC:
+ return ctx->Extensions.S3_s3tc;
+ case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+ return ctx->Extensions.EXT_texture_sRGB
+ && ctx->Extensions.EXT_texture_compression_s3tc;
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+ return ctx->Extensions.TDFX_texture_compression_FXT1;
+ case GL_COMPRESSED_RED_RGTC1:
+ case GL_COMPRESSED_SIGNED_RED_RGTC1:
+ case GL_COMPRESSED_RG_RGTC2:
+ case GL_COMPRESSED_SIGNED_RG_RGTC2:
+ return ctx->Extensions.ARB_texture_compression_rgtc;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Return the address of a specific pixel in an image (1D, 2D or 3D).
+ *
+ * Pixel unpacking/packing parameters are observed according to \p packing.
+ *
+ * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
+ * \param image starting address of image data
+ * \param width the image width
+ * \param height theimage height
+ * \param format the pixel format
+ * \param type the pixel data type
+ * \param packing the pixelstore attributes
+ * \param img which image in the volume (0 for 1D or 2D images)
+ * \param row row of pixel in the image (0 for 1D images)
+ * \param column column of pixel in the image
+ *
+ * \return address of pixel on success, or NULL on error.
+ *
+ * \sa gl_pixelstore_attrib.
+ */
+GLvoid *
+_mesa_image_address( GLuint dimensions,
+ const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint img, GLint row, GLint column )
+{
+ GLint alignment; /* 1, 2 or 4 */
+ GLint pixels_per_row;
+ GLint rows_per_image;
+ GLint skiprows;
+ GLint skippixels;
+ GLint skipimages; /* for 3-D volume images */
+ GLubyte *pixel_addr;
+
+ ASSERT(dimensions >= 1 && dimensions <= 3);
+
+ alignment = packing->Alignment;
+ if (packing->RowLength > 0) {
+ pixels_per_row = packing->RowLength;
+ }
+ else {
+ pixels_per_row = width;
+ }
+ if (packing->ImageHeight > 0) {
+ rows_per_image = packing->ImageHeight;
+ }
+ else {
+ rows_per_image = height;
+ }
+
+ skippixels = packing->SkipPixels;
+ /* Note: SKIP_ROWS _is_ used for 1D images */
+ skiprows = packing->SkipRows;
+ /* Note: SKIP_IMAGES is only used for 3D images */
+ skipimages = (dimensions == 3) ? packing->SkipImages : 0;
+
+ if (type == GL_BITMAP) {
+ /* BITMAP data */
+ GLint comp_per_pixel; /* components per pixel */
+ GLint bytes_per_comp; /* bytes per component */
+ GLint bytes_per_row;
+ GLint bytes_per_image;
+
+ /* Compute bytes per component */
+ bytes_per_comp = _mesa_sizeof_packed_type( type );
+ if (bytes_per_comp < 0) {
+ return NULL;
+ }
+
+ /* Compute number of components per pixel */
+ comp_per_pixel = _mesa_components_in_format( format );
+ if (comp_per_pixel < 0) {
+ return NULL;
+ }
+
+ bytes_per_row = alignment
+ * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
+
+ bytes_per_image = bytes_per_row * rows_per_image;
+
+ pixel_addr = (GLubyte *) image
+ + (skipimages + img) * bytes_per_image
+ + (skiprows + row) * bytes_per_row
+ + (skippixels + column) / 8;
+ }
+ else {
+ /* Non-BITMAP data */
+ GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
+ GLint topOfImage;
+
+ bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
+
+ /* The pixel type and format should have been error checked earlier */
+ assert(bytes_per_pixel > 0);
+
+ bytes_per_row = pixels_per_row * bytes_per_pixel;
+ remainder = bytes_per_row % alignment;
+ if (remainder > 0)
+ bytes_per_row += (alignment - remainder);
+
+ ASSERT(bytes_per_row % alignment == 0);
+
+ bytes_per_image = bytes_per_row * rows_per_image;
+
+ if (packing->Invert) {
+ /* set pixel_addr to the last row */
+ topOfImage = bytes_per_row * (height - 1);
+ bytes_per_row = -bytes_per_row;
+ }
+ else {
+ topOfImage = 0;
+ }
+
+ /* compute final pixel address */
+ pixel_addr = (GLubyte *) image
+ + (skipimages + img) * bytes_per_image
+ + topOfImage
+ + (skiprows + row) * bytes_per_row
+ + (skippixels + column) * bytes_per_pixel;
+ }
+
+ return (GLvoid *) pixel_addr;
+}
+
+
+GLvoid *
+_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width,
+ GLenum format, GLenum type,
+ GLint column )
+{
+ return _mesa_image_address(1, packing, image, width, 1,
+ format, type, 0, 0, column);
+}
+
+
+GLvoid *
+_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint row, GLint column )
+{
+ return _mesa_image_address(2, packing, image, width, height,
+ format, type, 0, row, column);
+}
+
+
+GLvoid *
+_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint img, GLint row, GLint column )
+{
+ return _mesa_image_address(3, packing, image, width, height,
+ format, type, img, row, column);
+}
+
+
+
+/**
+ * Compute the stride (in bytes) between image rows.
+ *
+ * \param packing the pixelstore attributes
+ * \param width image width.
+ * \param format pixel format.
+ * \param type pixel data type.
+ *
+ * \return the stride in bytes for the given parameters, or -1 if error
+ */
+GLint
+_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
+ GLint width, GLenum format, GLenum type )
+{
+ GLint bytesPerRow, remainder;
+
+ ASSERT(packing);
+
+ if (type == GL_BITMAP) {
+ if (packing->RowLength == 0) {
+ bytesPerRow = (width + 7) / 8;
+ }
+ else {
+ bytesPerRow = (packing->RowLength + 7) / 8;
+ }
+ }
+ else {
+ /* Non-BITMAP data */
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+ if (bytesPerPixel <= 0)
+ return -1; /* error */
+ if (packing->RowLength == 0) {
+ bytesPerRow = bytesPerPixel * width;
+ }
+ else {
+ bytesPerRow = bytesPerPixel * packing->RowLength;
+ }
+ }
+
+ remainder = bytesPerRow % packing->Alignment;
+ if (remainder > 0) {
+ bytesPerRow += (packing->Alignment - remainder);
+ }
+
+ if (packing->Invert) {
+ /* negate the bytes per row (negative row stride) */
+ bytesPerRow = -bytesPerRow;
+ }
+
+ return bytesPerRow;
+}
+
+
+/*
+ * Compute the stride between images in a 3D texture (in bytes) for the given
+ * pixel packing parameters and image width, format and type.
+ */
+GLint
+_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
+ GLint width, GLint height,
+ GLenum format, GLenum type )
+{
+ GLint bytesPerRow, bytesPerImage, remainder;
+
+ ASSERT(packing);
+
+ if (type == GL_BITMAP) {
+ if (packing->RowLength == 0) {
+ bytesPerRow = (width + 7) / 8;
+ }
+ else {
+ bytesPerRow = (packing->RowLength + 7) / 8;
+ }
+ }
+ else {
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+
+ if (bytesPerPixel <= 0)
+ return -1; /* error */
+ if (packing->RowLength == 0) {
+ bytesPerRow = bytesPerPixel * width;
+ }
+ else {
+ bytesPerRow = bytesPerPixel * packing->RowLength;
+ }
+ }
+
+ remainder = bytesPerRow % packing->Alignment;
+ if (remainder > 0)
+ bytesPerRow += (packing->Alignment - remainder);
+
+ if (packing->ImageHeight == 0)
+ bytesPerImage = bytesPerRow * height;
+ else
+ bytesPerImage = bytesPerRow * packing->ImageHeight;
+
+ return bytesPerImage;
+}
+
+
+
+/**
+ * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
+ * This is typically used to convert a bitmap into a GLubyte/pixel texture.
+ * "On" bits will set texels to \p onValue.
+ * "Off" bits will not modify texels.
+ * \param width src bitmap width in pixels
+ * \param height src bitmap height in pixels
+ * \param unpack bitmap unpacking state
+ * \param bitmap the src bitmap data
+ * \param destBuffer start of dest buffer
+ * \param destStride row stride in dest buffer
+ * \param onValue if bit is 1, set destBuffer pixel to this value
+ */
+void
+_mesa_expand_bitmap(GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap,
+ GLubyte *destBuffer, GLint destStride,
+ GLubyte onValue)
+{
+ const GLubyte *srcRow = (const GLubyte *)
+ _mesa_image_address2d(unpack, bitmap, width, height,
+ GL_COLOR_INDEX, GL_BITMAP, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(unpack, width,
+ GL_COLOR_INDEX, GL_BITMAP);
+ GLint row, col;
+
+#define SET_PIXEL(COL, ROW) \
+ destBuffer[(ROW) * destStride + (COL)] = onValue;
+
+ for (row = 0; row < height; row++) {
+ const GLubyte *src = srcRow;
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+
+ if (*src & mask) {
+ SET_PIXEL(col, row);
+ }
+
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+
+ if (*src & mask) {
+ SET_PIXEL(col, row);
+ }
+
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+
+ srcRow += srcStride;
+ } /* row */
+
+#undef SET_PIXEL
+}
+
+
+
+
+/**
+ * Convert an array of RGBA colors from one datatype to another.
+ * NOTE: src may equal dst. In that case, we use a temporary buffer.
+ */
+void
+_mesa_convert_colors(GLenum srcType, const GLvoid *src,
+ GLenum dstType, GLvoid *dst,
+ GLuint count, const GLubyte mask[])
+{
+ GLuint tempBuffer[MAX_WIDTH][4];
+ const GLboolean useTemp = (src == dst);
+
+ ASSERT(srcType != dstType);
+
+ switch (srcType) {
+ case GL_UNSIGNED_BYTE:
+ if (dstType == GL_UNSIGNED_SHORT) {
+ const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
+ GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
+ dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
+ dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
+ dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ }
+ else {
+ const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
+ GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
+ dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
+ dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
+ dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
+ GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
+ dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
+ dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
+ dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
+ GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
+ dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
+ dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
+ dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_FLOAT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
+ GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
+ GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_UNSIGNED_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
+ }
+}
+
+
+
+
+/**
+ * Perform basic clipping for glDrawPixels. The image's position and size
+ * and the unpack SkipPixels and SkipRows are adjusted so that the image
+ * region is entirely within the window and scissor bounds.
+ * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
+ * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
+ * we'll actually write. Beforehand, *destY-1 is the first drawing row.
+ *
+ * \return GL_TRUE if image is ready for drawing or
+ * GL_FALSE if image was completely clipped away (draw nothing)
+ */
+GLboolean
+_mesa_clip_drawpixels(const struct gl_context *ctx,
+ GLint *destX, GLint *destY,
+ GLsizei *width, GLsizei *height,
+ struct gl_pixelstore_attrib *unpack)
+{
+ const struct gl_framebuffer *buffer = ctx->DrawBuffer;
+
+ if (unpack->RowLength == 0) {
+ unpack->RowLength = *width;
+ }
+
+ ASSERT(ctx->Pixel.ZoomX == 1.0F);
+ ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
+
+ /* left clipping */
+ if (*destX < buffer->_Xmin) {
+ unpack->SkipPixels += (buffer->_Xmin - *destX);
+ *width -= (buffer->_Xmin - *destX);
+ *destX = buffer->_Xmin;
+ }
+ /* right clipping */
+ if (*destX + *width > buffer->_Xmax)
+ *width -= (*destX + *width - buffer->_Xmax);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ if (ctx->Pixel.ZoomY == 1.0F) {
+ /* bottom clipping */
+ if (*destY < buffer->_Ymin) {
+ unpack->SkipRows += (buffer->_Ymin - *destY);
+ *height -= (buffer->_Ymin - *destY);
+ *destY = buffer->_Ymin;
+ }
+ /* top clipping */
+ if (*destY + *height > buffer->_Ymax)
+ *height -= (*destY + *height - buffer->_Ymax);
+ }
+ else { /* upside down */
+ /* top clipping */
+ if (*destY > buffer->_Ymax) {
+ unpack->SkipRows += (*destY - buffer->_Ymax);
+ *height -= (*destY - buffer->_Ymax);
+ *destY = buffer->_Ymax;
+ }
+ /* bottom clipping */
+ if (*destY - *height < buffer->_Ymin)
+ *height -= (buffer->_Ymin - (*destY - *height));
+ /* adjust destY so it's the first row to write to */
+ (*destY)--;
+ }
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Perform clipping for glReadPixels. The image's window position
+ * and size, and the pack skipPixels, skipRows and rowLength are adjusted
+ * so that the image region is entirely within the window bounds.
+ * Note: this is different from _mesa_clip_drawpixels() in that the
+ * scissor box is ignored, and we use the bounds of the current readbuffer
+ * surface.
+ *
+ * \return GL_TRUE if image is ready for drawing or
+ * GL_FALSE if image was completely clipped away (draw nothing)
+ */
+GLboolean
+_mesa_clip_readpixels(const struct gl_context *ctx,
+ GLint *srcX, GLint *srcY,
+ GLsizei *width, GLsizei *height,
+ struct gl_pixelstore_attrib *pack)
+{
+ const struct gl_framebuffer *buffer = ctx->ReadBuffer;
+
+ if (pack->RowLength == 0) {
+ pack->RowLength = *width;
+ }
+
+ /* left clipping */
+ if (*srcX < 0) {
+ pack->SkipPixels += (0 - *srcX);
+ *width -= (0 - *srcX);
+ *srcX = 0;
+ }
+ /* right clipping */
+ if (*srcX + *width > (GLsizei) buffer->Width)
+ *width -= (*srcX + *width - buffer->Width);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ /* bottom clipping */
+ if (*srcY < 0) {
+ pack->SkipRows += (0 - *srcY);
+ *height -= (0 - *srcY);
+ *srcY = 0;
+ }
+ /* top clipping */
+ if (*srcY + *height > (GLsizei) buffer->Height)
+ *height -= (*srcY + *height - buffer->Height);
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Do clipping for a glCopyTexSubImage call.
+ * The framebuffer source region might extend outside the framebuffer
+ * bounds. Clip the source region against the framebuffer bounds and
+ * adjust the texture/dest position and size accordingly.
+ *
+ * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
+ */
+GLboolean
+_mesa_clip_copytexsubimage(const struct gl_context *ctx,
+ GLint *destX, GLint *destY,
+ GLint *srcX, GLint *srcY,
+ GLsizei *width, GLsizei *height)
+{
+ const struct gl_framebuffer *fb = ctx->ReadBuffer;
+ const GLint srcX0 = *srcX, srcY0 = *srcY;
+
+ if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
+ srcX, srcY, width, height)) {
+ *destX = *destX + *srcX - srcX0;
+ *destY = *destY + *srcY - srcY0;
+
+ return GL_TRUE;
+ }
+ else {
+ return GL_FALSE;
+ }
+}
+
+
+
+/**
+ * Clip the rectangle defined by (x, y, width, height) against the bounds
+ * specified by [xmin, xmax) and [ymin, ymax).
+ * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
+ */
+GLboolean
+_mesa_clip_to_region(GLint xmin, GLint ymin,
+ GLint xmax, GLint ymax,
+ GLint *x, GLint *y,
+ GLsizei *width, GLsizei *height )
+{
+ /* left clipping */
+ if (*x < xmin) {
+ *width -= (xmin - *x);
+ *x = xmin;
+ }
+
+ /* right clipping */
+ if (*x + *width > xmax)
+ *width -= (*x + *width - xmax);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ /* bottom (or top) clipping */
+ if (*y < ymin) {
+ *height -= (ymin - *y);
+ *y = ymin;
+ }
+
+ /* top (or bottom) clipping */
+ if (*y + *height > ymax)
+ *height -= (*y + *height - ymax);
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Clip dst coords against Xmax (or Ymax).
+ */
+static INLINE void
+clip_right_or_top(GLint *srcX0, GLint *srcX1,
+ GLint *dstX0, GLint *dstX1,
+ GLint maxValue)
+{
+ GLfloat t, bias;
+
+ if (*dstX1 > maxValue) {
+ /* X1 outside right edge */
+ ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */
+ t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
+ /* chop off [t, 1] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX1 = maxValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
+ *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
+ }
+ else if (*dstX0 > maxValue) {
+ /* X0 outside right edge */
+ ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */
+ t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
+ /* chop off [t, 1] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX0 = maxValue;
+ bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;
+ *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
+ }
+}
+
+
+/**
+ * Clip dst coords against Xmin (or Ymin).
+ */
+static INLINE void
+clip_left_or_bottom(GLint *srcX0, GLint *srcX1,
+ GLint *dstX0, GLint *dstX1,
+ GLint minValue)
+{
+ GLfloat t, bias;
+
+ if (*dstX0 < minValue) {
+ /* X0 outside left edge */
+ ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */
+ t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
+ /* chop off [0, t] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX0 = minValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */
+ *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
+ }
+ else if (*dstX1 < minValue) {
+ /* X1 outside left edge */
+ ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */
+ t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
+ /* chop off [0, t] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX1 = minValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
+ *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
+ }
+}
+
+
+/**
+ * Do clipping of blit src/dest rectangles.
+ * The dest rect is clipped against both the buffer bounds and scissor bounds.
+ * The src rect is just clipped against the buffer bounds.
+ *
+ * When either the src or dest rect is clipped, the other is also clipped
+ * proportionately!
+ *
+ * Note that X0 need not be less than X1 (same for Y) for either the source
+ * and dest rects. That makes the clipping a little trickier.
+ *
+ * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
+ */
+GLboolean
+_mesa_clip_blit(struct gl_context *ctx,
+ GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,
+ GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)
+{
+ const GLint srcXmin = 0;
+ const GLint srcXmax = ctx->ReadBuffer->Width;
+ const GLint srcYmin = 0;
+ const GLint srcYmax = ctx->ReadBuffer->Height;
+
+ /* these include scissor bounds */
+ const GLint dstXmin = ctx->DrawBuffer->_Xmin;
+ const GLint dstXmax = ctx->DrawBuffer->_Xmax;
+ const GLint dstYmin = ctx->DrawBuffer->_Ymin;
+ const GLint dstYmax = ctx->DrawBuffer->_Ymax;
+
+ /*
+ printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
+ *srcX0, *srcX1, *dstX0, *dstX1);
+ printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
+ *srcY0, *srcY1, *dstY0, *dstY1);
+ */
+
+ /* trivial rejection tests */
+ if (*dstX0 == *dstX1)
+ return GL_FALSE; /* no width */
+ if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)
+ return GL_FALSE; /* totally out (left) of bounds */
+ if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)
+ return GL_FALSE; /* totally out (right) of bounds */
+
+ if (*dstY0 == *dstY1)
+ return GL_FALSE;
+ if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)
+ return GL_FALSE;
+ if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)
+ return GL_FALSE;
+
+ if (*srcX0 == *srcX1)
+ return GL_FALSE;
+ if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)
+ return GL_FALSE;
+ if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)
+ return GL_FALSE;
+
+ if (*srcY0 == *srcY1)
+ return GL_FALSE;
+ if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)
+ return GL_FALSE;
+ if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)
+ return GL_FALSE;
+
+ /*
+ * dest clip
+ */
+ clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);
+ clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);
+ clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);
+ clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);
+
+ /*
+ * src clip (just swap src/dst values from above)
+ */
+ clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);
+ clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);
+ clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);
+ clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);
+
+ /*
+ printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
+ *srcX0, *srcX1, *dstX0, *dstX1);
+ printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
+ *srcY0, *srcY1, *dstY0, *dstY1);
+ */
+
+ ASSERT(*dstX0 >= dstXmin);
+ ASSERT(*dstX0 <= dstXmax);
+ ASSERT(*dstX1 >= dstXmin);
+ ASSERT(*dstX1 <= dstXmax);
+
+ ASSERT(*dstY0 >= dstYmin);
+ ASSERT(*dstY0 <= dstYmax);
+ ASSERT(*dstY1 >= dstYmin);
+ ASSERT(*dstY1 <= dstYmax);
+
+ ASSERT(*srcX0 >= srcXmin);
+ ASSERT(*srcX0 <= srcXmax);
+ ASSERT(*srcX1 >= srcXmin);
+ ASSERT(*srcX1 <= srcXmax);
+
+ ASSERT(*srcY0 >= srcYmin);
+ ASSERT(*srcY0 <= srcYmax);
+ ASSERT(*srcY1 >= srcYmin);
+ ASSERT(*srcY1 <= srcYmax);
+
+ return GL_TRUE;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 12:06:54 +0000