diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/main/image.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/main/image.c | 4202 |
1 files changed, 0 insertions, 4202 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/main/image.c b/nx-X11/extras/Mesa/src/mesa/main/image.c deleted file mode 100644 index bd0c5ba1f..000000000 --- a/nx-X11/extras/Mesa/src/mesa/main/image.c +++ /dev/null @@ -1,4202 +0,0 @@ -/* - * Mesa 3-D graphics library - * Version: 6.3 - * - * Copyright (C) 1999-2004 Brian Paul 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 "bufferobj.h" -#include "colormac.h" -#include "context.h" -#include "image.h" -#include "imports.h" -#include "histogram.h" -#include "macros.h" -#include "pixel.h" -#include "mtypes.h" - - -/** Compute ceiling of integer quotient of A divided by B. */ -#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 ) - - -/** - * 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 ) -{ - register 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 ) -{ - register 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 ) -{ - register 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_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); - 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_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_LUMINANCE: - case GL_INTENSITY: - return 1; - case GL_LUMINANCE_ALPHA: - return 2; - case GL_RGB: - return 3; - case GL_RGBA: - return 4; - case GL_BGR: - return 3; - case GL_BGRA: - return 4; - case GL_ABGR_EXT: - return 4; - case GL_YCBCR_MESA: - 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; - 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) { - 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; - default: - ; /* fall-through */ - } - 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 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. - * - * Computes the number of bytes per pixel and row and compensates for alignment. - * - * \sa gl_pixelstore_attrib. - */ -GLint -_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing, - GLint width, GLenum format, GLenum type ) -{ - ASSERT(packing); - if (type == GL_BITMAP) { - /* BITMAP data */ - GLint bytes; - if (packing->RowLength == 0) { - bytes = (width + 7) / 8; - } - else { - bytes = (packing->RowLength + 7) / 8; - } - if (packing->Invert) { - /* negate the bytes per row (negative row stride) */ - bytes = -bytes; - } - return bytes; - } - else { - /* Non-BITMAP data */ - const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type); - GLint bytesPerRow, remainder; - 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) - 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 ) -{ - ASSERT(packing); - ASSERT(type != GL_BITMAP); - - { - const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type); - GLint bytesPerRow, bytesPerImage, remainder; - - 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 == 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 == 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; - } - } - } - } - src += width_in_bytes; - } -} - - -/** - * 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, GLuint 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, 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->PostConvolutionColorTable, 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->PostColorMatrixColorTable, n, rgba); - } - /* update histogram count */ - if (transferOps & IMAGE_HISTOGRAM_BIT) { - _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba); - } - /* update min/max values */ - if (transferOps & IMAGE_MIN_MAX_BIT) { - _mesa_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); - } - } -} - - - -/** - * Used to pack an array [][4] of RGBA float colors as specified - * by the dstFormat, dstType and dstPacking. Used by glReadPixels, - * glGetConvolutionFilter(), etc. - * NOTE: it's assumed the incoming float colors are all in [0,1]. - */ -void -_mesa_pack_rgba_span_float( GLcontext *ctx, - GLuint n, CONST GLfloat rgbaIn[][4], - GLenum dstFormat, GLenum dstType, - GLvoid *dstAddr, - const struct gl_pixelstore_attrib *dstPacking, - GLuint transferOps ) -{ - const GLint comps = _mesa_components_in_format(dstFormat); - GLfloat luminance[MAX_WIDTH]; - const GLfloat (*rgba)[4]; - GLuint i; - - if (transferOps) { - /* make copy of incoming data */ - DEFMARRAY(GLfloat, rgbaCopy, MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(rgbaCopy, return); /* mac 32k limitation */ - - _mesa_memcpy(rgbaCopy, rgbaIn, n * 4 * sizeof(GLfloat)); - _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgbaCopy); - rgba = (const GLfloat (*)[4]) rgbaCopy; - - if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) { - UNDEFARRAY(rgbaCopy); /* mac 32k limitation */ - return; - } - UNDEFARRAY(rgbaCopy); /* mac 32k limitation */ - } - else { - /* use incoming data, not a copy */ - rgba = (const GLfloat (*)[4]) rgbaIn; - } - - if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) { - /* compute luminance values */ - if (ctx->ClampFragmentColors) { - 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; - 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]); - } - 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; - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap2( (GLushort *) dst, n * comps); - } - } - 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]); - } - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap2( (GLushort *) dst, n * comps ); - } - } - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap4( (GLuint *) dst, n * comps ); - } - } - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap4( (GLuint *) dst, n * comps ); - } - } - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap4( (GLuint *) dst, n * comps ); - } - } - 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; - default: - _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); - } - if (dstPacking->SwapBytes) { - _mesa_swap2( (GLushort *) dst, n * comps ); - } - } - break; - case GL_UNSIGNED_BYTE_3_3_2: - if (dstFormat == GL_RGB) { - GLubyte *dst = (GLubyte *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5) - | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 7.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 3) - | (((GLint) (rgba[i][BCOMP] * 3.0F)) << 5); - } - } - break; - case GL_UNSIGNED_SHORT_5_6_5: - if (dstFormat == GL_RGB) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11) - | (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 31.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8) - | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][ACOMP] * 15.0F)) ); - } - } - else if (dstFormat == GL_BGRA) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) << 12) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8) - | (((GLint) (rgba[i][RCOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][ACOMP] * 15.0F)) ); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 12) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 15.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8) - | (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12); - } - } - else if (dstFormat == GL_BGRA) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][RCOMP] * 15.0F)) << 8) - | (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) ) - | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4) - | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6) - | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 1) - | (((GLint) (rgba[i][ACOMP] * 1.0F)) ); - } - } - else if (dstFormat == GL_BGRA) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6) - | (((GLint) (rgba[i][RCOMP] * 31.0F)) << 1) - | (((GLint) (rgba[i][ACOMP] * 1.0F)) ); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) << 11) - | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 6) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 1) - | (((GLint) (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] = (((GLint) (rgba[i][RCOMP] * 31.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5) - | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 10) - | (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15); - } - } - else if (dstFormat == GL_BGRA) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) ) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5) - | (((GLint) (rgba[i][RCOMP] * 31.0F)) << 10) - | (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLushort *dst = (GLushort *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) ) - | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 5) - | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 10) - | (((GLint) (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] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16) - | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][ACOMP] * 255.0F)) ); - } - } - else if (dstFormat == GL_BGRA) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 24) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16) - | (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][ACOMP] * 255.0F)) ); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24) - | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][RCOMP] * 255.0F)) ); - } - } - 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] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) ) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16) - | (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24); - } - } - else if (dstFormat == GL_BGRA) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) ) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 16) - | (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) ) - | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8) - | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16) - | (((GLuint) (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] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 22) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12) - | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 2) - | (((GLuint) (rgba[i][ACOMP] * 3.0F)) ); - } - } - else if (dstFormat == GL_BGRA) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 22) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12) - | (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 2) - | (((GLuint) (rgba[i][ACOMP] * 3.0F)) ); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) << 22) - | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 12) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 2) - | (((GLuint) (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] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) ) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10) - | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 20) - | (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30); - } - } - else if (dstFormat == GL_BGRA) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) ) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10) - | (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 20) - | (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30); - } - } - else if (dstFormat == GL_ABGR_EXT) { - GLuint *dst = (GLuint *) dstAddr; - for (i=0;i<n;i++) { - dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) ) - | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 10) - | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 20) - | (((GLuint) (rgba[i][RCOMP] * 3.0F)) << 30); - } - } - break; - default: - _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float"); - } -} - - -/* - * Pack the given RGBA span into client memory at 'dest' address - * in the given pixel format and type. - * Optionally apply the enabled pixel transfer ops. - * Pack into memory using the given packing params struct. - * This is used by glReadPixels and glGetTexImage?D() - * \param ctx - the context - * n - number of pixels in the span - * rgba - the pixels - * format - dest packing format - * type - dest packing data type - * destination - destination packing address - * packing - pixel packing parameters - * transferOps - bitmask of IMAGE_*_BIT operations to apply - */ -void -_mesa_pack_rgba_span_chan( GLcontext *ctx, - GLuint n, CONST GLchan srcRgba[][4], - GLenum dstFormat, GLenum dstType, - GLvoid *dstAddr, - const struct gl_pixelstore_attrib *dstPacking, - GLuint transferOps) -{ - ASSERT((ctx->NewState & _NEW_PIXEL) == 0 || transferOps == 0); - - /* Test for optimized case first */ - if (transferOps == 0 && dstFormat == GL_RGBA && dstType == CHAN_TYPE) { - /* common simple case */ - MEMCPY(dstAddr, srcRgba, n * 4 * sizeof(GLchan)); - } - else if (transferOps == 0 && dstFormat == GL_RGB && dstType == CHAN_TYPE) { - /* common simple case */ - GLuint i; - GLchan *dest = (GLchan *) dstAddr; - for (i = 0; i < n; i++) { - dest[0] = srcRgba[i][RCOMP]; - dest[1] = srcRgba[i][GCOMP]; - dest[2] = srcRgba[i][BCOMP]; - dest += 3; - } - } - else if (transferOps == 0 && dstFormat == GL_RGBA && dstType == GL_UNSIGNED_BYTE) { - /* common simple case */ - GLuint i; - GLubyte *dest = (GLubyte *) dstAddr; - for (i = 0; i < n; i++) { - dest[0] = CHAN_TO_UBYTE(srcRgba[i][RCOMP]); - dest[1] = CHAN_TO_UBYTE(srcRgba[i][GCOMP]); - dest[2] = CHAN_TO_UBYTE(srcRgba[i][BCOMP]); - dest[3] = CHAN_TO_UBYTE(srcRgba[i][ACOMP]); - dest += 4; - } - } - else { - /* general solution */ - GLuint i; - DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(rgba, return); /* mac 32k limitation */ - - assert(n <= MAX_WIDTH); - /* convert color components to floating point */ - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = CHAN_TO_FLOAT(srcRgba[i][RCOMP]); - rgba[i][GCOMP] = CHAN_TO_FLOAT(srcRgba[i][GCOMP]); - rgba[i][BCOMP] = CHAN_TO_FLOAT(srcRgba[i][BCOMP]); - rgba[i][ACOMP] = CHAN_TO_FLOAT(srcRgba[i][ACOMP]); - } - _mesa_pack_rgba_span_float(ctx, n, (const GLfloat (*)[4]) rgba, - dstFormat, dstType, dstAddr, - dstPacking, transferOps); - UNDEFARRAY(rgba); /* mac 32k limitation */ - } -} - - -#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); - - 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); - - 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; - 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; - - 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); - - 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: - redIndex = 0; - greenIndex = blueIndex = alphaIndex = -1; - stride = 1; - break; - case GL_GREEN: - greenIndex = 0; - redIndex = blueIndex = alphaIndex = -1; - stride = 1; - break; - case GL_BLUE: - blueIndex = 0; - redIndex = greenIndex = alphaIndex = -1; - stride = 1; - break; - case GL_ALPHA: - redIndex = greenIndex = blueIndex = -1; - alphaIndex = 0; - stride = 1; - break; - case GL_LUMINANCE: - redIndex = greenIndex = blueIndex = 0; - alphaIndex = -1; - stride = 1; - break; - case GL_LUMINANCE_ALPHA: - redIndex = greenIndex = blueIndex = 0; - alphaIndex = 1; - stride = 2; - break; - case GL_INTENSITY: - redIndex = greenIndex = blueIndex = alphaIndex = 0; - stride = 1; - break; - case GL_RGB: - 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: - 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; - default: - _mesa_problem(NULL, "bad srcFormat in extract float data"); - return; - } - - -#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \ - if ((INDEX) < 0) { \ - GLuint i; \ - 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); \ - } \ - rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \ - s += stride; \ - } \ - } \ - else { \ - const TYPE *s = (const TYPE *) src; \ - GLuint i; \ - 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, GLubyte, UBYTE_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT); - break; - case GL_BYTE: - PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT); - break; - case GL_UNSIGNED_SHORT: - PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT); - break; - case GL_SHORT: - PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT); - break; - case GL_UNSIGNED_INT: - PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT); - break; - case GL_INT: - PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT); - PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT); - PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT); - PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT); - break; - case GL_FLOAT: - PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat)); - PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat)); - PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat)); - PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat)); - break; - case GL_HALF_FLOAT_ARB: - PROCESS(redIndex, RCOMP, 0.0F, GLhalfARB, _mesa_half_to_float); - PROCESS(greenIndex, GCOMP, 0.0F, GLhalfARB, _mesa_half_to_float); - PROCESS(blueIndex, BCOMP, 0.0F, GLhalfARB, _mesa_half_to_float); - PROCESS(alphaIndex, ACOMP, 1.0F, GLhalfARB, _mesa_half_to_float); - break; - case GL_UNSIGNED_BYTE_3_3_2: - { - const GLubyte *ubsrc = (const GLubyte *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLubyte p = ubsrc[i]; - rgba[i][rComp] = ((p >> 5) ) * (1.0F / 7.0F); - rgba[i][gComp] = ((p >> 2) & 0x7) * (1.0F / 7.0F); - rgba[i][bComp] = ((p ) & 0x3) * (1.0F / 3.0F); - rgba[i][aComp] = 1.0F; - } - } - break; - case GL_UNSIGNED_BYTE_2_3_3_REV: - { - const GLubyte *ubsrc = (const GLubyte *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLubyte p = ubsrc[i]; - rgba[i][rComp] = ((p ) & 0x7) * (1.0F / 7.0F); - rgba[i][gComp] = ((p >> 3) & 0x7) * (1.0F / 7.0F); - rgba[i][bComp] = ((p >> 6) ) * (1.0F / 3.0F); - rgba[i][aComp] = 1.0F; - } - } - break; - case GL_UNSIGNED_SHORT_5_6_5: - 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) ) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F); - rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F); - 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) ) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F); - rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F); - rgba[i][aComp] = 1.0F; - } - } - break; - case GL_UNSIGNED_SHORT_5_6_5_REV: - 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) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F); - rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F); - 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) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F); - rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F); - rgba[i][aComp] = 1.0F; - } - } - break; - case GL_UNSIGNED_SHORT_4_4_4_4: - 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) ) * (1.0F / 15.0F); - rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F); - rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F); - rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F); - } - } - else { - const GLushort *ussrc = (const GLushort *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLushort p = ussrc[i]; - rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F); - rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F); - rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F); - rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F); - } - } - break; - case GL_UNSIGNED_SHORT_4_4_4_4_REV: - 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) * (1.0F / 15.0F); - rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F); - rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F); - rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F); - } - } - else { - const GLushort *ussrc = (const GLushort *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLushort p = ussrc[i]; - rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F); - rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F); - rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F); - rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F); - } - } - break; - case GL_UNSIGNED_SHORT_5_5_5_1: - 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) ) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F); - rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F); - rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 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) ) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F); - rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F); - rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F); - } - } - break; - case GL_UNSIGNED_SHORT_1_5_5_5_REV: - 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) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F); - rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F); - rgba[i][aComp] = ((p >> 15) ) * (1.0F / 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) * (1.0F / 31.0F); - rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F); - rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F); - rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F); - } - } - break; - case GL_UNSIGNED_INT_8_8_8_8: - if (swapBytes) { - const GLuint *uisrc = (const GLuint *) src; - GLuint i; - 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; - 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; - 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; - 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 (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) ) * (1.0F / 1023.0F); - rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F); - } - } - else { - const GLuint *uisrc = (const GLuint *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLuint p = uisrc[i]; - rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F); - rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F); - } - } - break; - case GL_UNSIGNED_INT_2_10_10_10_REV: - 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) * (1.0F / 1023.0F); - rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F); - } - } - else { - const GLuint *uisrc = (const GLuint *) src; - GLuint i; - for (i = 0; i < n; i ++) { - GLuint p = uisrc[i]; - rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F); - rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F); - } - } - 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, - GLuint 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; - DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(rgba, return); /* mac 32k limitation */ - - 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 - && (transferOps & IMAGE_MAP_COLOR_BIT)) { - _mesa_map_ci(ctx, n, indexes); - } - if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { - _mesa_shift_and_offset_ci(ctx, n, indexes); - } - - if (dstFormat == GL_COLOR_INDEX) { - /* convert to GLchan and return */ - GLuint i; - for (i = 0; i < n; i++) { - dest[i] = (GLchan) (indexes[i] & 0xff); - } - UNDEFARRAY(rgba); /* mac 32k limitation */ - return; - } - else { - /* Convert indexes to RGBA */ - _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()"); - UNDEFARRAY(rgba); /* mac 32k limitation */ - 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; - } - } - UNDEFARRAY(rgba); /* mac 32k limitation */ - } -} - - -/** - * 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, - GLuint 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); - - /* general solution, no special cases, yet */ - { - GLint dstComponents; - GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex; - GLint dstLuminanceIndex, dstIntensityIndex; - DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(rgba, return); /* mac 32k limitation */ - - 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 - && (transferOps & IMAGE_MAP_COLOR_BIT)) { - _mesa_map_ci(ctx, n, indexes); - } - if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { - _mesa_shift_and_offset_ci(ctx, n, indexes); - } - - if (dstFormat == GL_COLOR_INDEX) { - /* convert to GLchan and return */ - GLuint i; - for (i = 0; i < n; i++) { - dest[i] = (GLchan) (indexes[i] & 0xff); - } - UNDEFARRAY(rgba); /* mac 32k limitation */ - return; - } - else { - /* Convert indexes to RGBA */ - _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()"); - UNDEFARRAY(rgba); /* mac 32k limitation */ - 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; - } - } - UNDEFARRAY(rgba); /* mac 32k limitation */ - } -} - - -/* - * 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, - GLuint 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 & IMAGE_SHIFT_OFFSET_BIT) { - /* shift and offset indexes */ - _mesa_shift_and_offset_ci(ctx, n, indexes); - } - if (transferOps & IMAGE_MAP_COLOR_BIT) { - /* Apply lookup table */ - _mesa_map_ci(ctx, 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, - GLuint 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)); - if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { - _mesa_shift_and_offset_ci( ctx, n, indexes); - } - if (transferOps & IMAGE_MAP_COLOR_BIT) { - _mesa_map_ci(ctx, 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, - GLuint 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); - - /* only shift and offset apply to stencil */ - transferOps &= 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) { - if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { - /* shift and offset indexes */ - _mesa_shift_and_offset_ci(ctx, n, indexes); - } - - if (ctx->Pixel.MapStencilFlag) { - /* Apply stencil lookup table */ - GLuint mask = ctx->Pixel.MapStoSsize - 1; - GLuint i; - for (i=0;i<n;i++) { - indexes[i] = ctx->Pixel.MapStoS[ 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)); - if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) { - _mesa_shift_and_offset_stencil( ctx, n, stencil ); - } - if (ctx->Pixel.MapStencilFlag) { - _mesa_map_stencil( ctx, n, stencil ); - } - source = stencil; - } - - switch (dstType) { - case GL_UNSIGNED_BYTE: - if (sizeof(GLstencil) == 8) { - 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: - if (sizeof(GLstencil) == 8) { - MEMCPY( dest, source, n ); - } - else { - 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++ = (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"); - } -} - - -void -_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n, GLfloat *dest, - GLenum srcType, const GLvoid *source, - const struct gl_pixelstore_attrib *srcPacking ) -{ - (void) srcPacking; - - switch (srcType) { - case GL_BYTE: - { - GLuint i; - const GLubyte *src = (const GLubyte *) source; - for (i = 0; i < n; i++) { - dest[i] = BYTE_TO_FLOAT(src[i]); - } - } - break; - case GL_UNSIGNED_BYTE: - { - GLuint i; - const GLubyte *src = (const GLubyte *) source; - for (i = 0; i < n; i++) { - dest[i] = UBYTE_TO_FLOAT(src[i]); - } - } - break; - case GL_SHORT: - { - GLuint i; - const GLshort *src = (const GLshort *) source; - for (i = 0; i < n; i++) { - dest[i] = SHORT_TO_FLOAT(src[i]); - } - } - break; - case GL_UNSIGNED_SHORT: - { - GLuint i; - const GLushort *src = (const GLushort *) source; - for (i = 0; i < n; i++) { - dest[i] = USHORT_TO_FLOAT(src[i]); - } - } - break; - case GL_INT: - { - GLuint i; - const GLint *src = (const GLint *) source; - for (i = 0; i < n; i++) { - dest[i] = INT_TO_FLOAT(src[i]); - } - } - break; - case GL_UNSIGNED_INT: - { - GLuint i; - const GLuint *src = (const GLuint *) source; - for (i = 0; i < n; i++) { - dest[i] = UINT_TO_FLOAT(src[i]); - } - } - break; - case GL_FLOAT: - MEMCPY(dest, source, n * sizeof(GLfloat)); - break; - case GL_HALF_FLOAT_ARB: - { - GLuint i; - const GLhalfARB *src = (const GLhalfARB *) source; - for (i = 0; i < n; i++) { - dest[i] = _mesa_half_to_float(src[i]); - } - } - break; - default: - _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()"); - return; - } - - - /* apply depth scale and bias and clamp to [0,1] */ - if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) { - GLuint i; - for (i = 0; i < n; i++) { - GLfloat d = dest[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias; - dest[i] = CLAMP(d, 0.0F, 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]; - const GLboolean bias_or_scale = ctx->Pixel.DepthBias != 0.0 || - ctx->Pixel.DepthScale != 1.0; - - ASSERT(n <= MAX_WIDTH); - - if (bias_or_scale) { - GLuint i; - for (i = 0; i < n; i++) { - GLfloat d; - d = depthSpan[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias; - depthCopy[i] = CLAMP(d, 0.0F, 1.0F); - } - 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"); - } -} - - -/** - * 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 (format == 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); - const GLint components = _mesa_components_in_format(format); - GLint bytesPerComp; - 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); - 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 - - -/** - * Perform clipping for glDrawPixels. The image's window 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). - * - * \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, - GLint *skipPixels, GLint *skipRows) -{ - const GLframebuffer *buffer = ctx->DrawBuffer; - - ASSERT(ctx->Pixel.ZoomX == 1.0F && ctx->Pixel.ZoomY == 1.0F); - - /* left clipping */ - if (*destX < buffer->_Xmin) { - *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; - - /* bottom clipping */ - if (*destY < buffer->_Ymin) { - *skipRows += (buffer->_Ymin - *destY); - *height -= (buffer->_Ymin - *destY); - *destY = buffer->_Ymin; - } - /* top clipping */ - if (*destY + *height > buffer->_Ymax) - *height -= (*destY + *height - buffer->_Ymax); - - if (*height <= 0) - return GL_TRUE; - - return GL_TRUE; -} - - -/** - * Perform clipping for glReadPixels. The image's window position - * and size, and the pack skipPixels and skipRows 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 "read" - * 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, - GLint *skipPixels, GLint *skipRows) -{ - const GLframebuffer *buffer = ctx->ReadBuffer; - - /* left clipping */ - if (*srcX < 0) { - *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) { - *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_TRUE; - - return GL_TRUE; -} - |