diff options
Diffstat (limited to 'mesalib/src/mesa/main/image.c')
| -rw-r--r-- | mesalib/src/mesa/main/image.c | 5820 |
1 files changed, 5820 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/image.c b/mesalib/src/mesa/main/image.c new file mode 100644 index 000000000..baecbab0a --- /dev/null +++ b/mesalib/src/mesa/main/image.c @@ -0,0 +1,5820 @@ +/* + * Mesa 3-D graphics library + * Version: 7.5 + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009 VMware, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +/** + * \file image.c + * Image handling. + */ + + +#include "glheader.h" +#include "colormac.h" +#include "context.h" +#include "image.h" +#include "imports.h" +#include "macros.h" +#include "pixel.h" + + +/** + * NOTE: + * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when + * we later convert the float to a packed integer value (such as for + * GL_RGB5_A1) because we'll wind up with a non-zero value. + * + * We redefine the macros here so zero is handled correctly. + */ +#undef BYTE_TO_FLOAT +#define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F))) + +#undef SHORT_TO_FLOAT +#define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))) + + + +/** Compute ceiling of integer quotient of A divided by B. */ +#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 ) + + +/** + * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise. + */ +GLboolean +_mesa_type_is_packed(GLenum type) +{ + switch (type) { + case GL_UNSIGNED_BYTE_3_3_2: + case GL_UNSIGNED_BYTE_2_3_3_REV: + case GL_UNSIGNED_SHORT_5_6_5: + case GL_UNSIGNED_SHORT_5_6_5_REV: + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + case GL_UNSIGNED_SHORT_5_5_5_1: + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + case GL_UNSIGNED_INT_8_8_8_8: + case GL_UNSIGNED_INT_8_8_8_8_REV: + case GL_UNSIGNED_INT_10_10_10_2: + case GL_UNSIGNED_INT_2_10_10_10_REV: + case GL_UNSIGNED_SHORT_8_8_MESA: + case GL_UNSIGNED_SHORT_8_8_REV_MESA: + case GL_UNSIGNED_INT_24_8_EXT: + return GL_TRUE; + } + + return GL_FALSE; +} + +/** + * Flip the 8 bits in each byte of the given array. + * + * \param p array. + * \param n number of bytes. + * + * \todo try this trick to flip bytes someday: + * \code + * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555); + * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333); + * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f); + * \endcode + */ +static void +flip_bytes( GLubyte *p, GLuint n ) +{ + GLuint i, a, b; + for (i = 0; i < n; i++) { + b = (GLuint) p[i]; /* words are often faster than bytes */ + a = ((b & 0x01) << 7) | + ((b & 0x02) << 5) | + ((b & 0x04) << 3) | + ((b & 0x08) << 1) | + ((b & 0x10) >> 1) | + ((b & 0x20) >> 3) | + ((b & 0x40) >> 5) | + ((b & 0x80) >> 7); + p[i] = (GLubyte) a; + } +} + + +/** + * Flip the order of the 2 bytes in each word in the given array. + * + * \param p array. + * \param n number of words. + */ +void +_mesa_swap2( GLushort *p, GLuint n ) +{ + GLuint i; + for (i = 0; i < n; i++) { + p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00); + } +} + + + +/* + * Flip the order of the 4 bytes in each word in the given array. + */ +void +_mesa_swap4( GLuint *p, GLuint n ) +{ + GLuint i, a, b; + for (i = 0; i < n; i++) { + b = p[i]; + a = (b >> 24) + | ((b >> 8) & 0xff00) + | ((b << 8) & 0xff0000) + | ((b << 24) & 0xff000000); + p[i] = a; + } +} + + +/** + * Get the size of a GL data type. + * + * \param type GL data type. + * + * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1 + * if an invalid type enum. + */ +GLint +_mesa_sizeof_type( GLenum type ) +{ + switch (type) { + case GL_BITMAP: + return 0; + case GL_UNSIGNED_BYTE: + return sizeof(GLubyte); + case GL_BYTE: + return sizeof(GLbyte); + case GL_UNSIGNED_SHORT: + return sizeof(GLushort); + case GL_SHORT: + return sizeof(GLshort); + case GL_UNSIGNED_INT: + return sizeof(GLuint); + case GL_INT: + return sizeof(GLint); + case GL_FLOAT: + return sizeof(GLfloat); + case GL_DOUBLE: + return sizeof(GLdouble); + case GL_HALF_FLOAT_ARB: + return sizeof(GLhalfARB); + default: + return -1; + } +} + + +/** + * Same as _mesa_sizeof_type() but also accepting the packed pixel + * format data types. + */ +GLint +_mesa_sizeof_packed_type( GLenum type ) +{ + switch (type) { + case GL_BITMAP: + return 0; + case GL_UNSIGNED_BYTE: + return sizeof(GLubyte); + case GL_BYTE: + return sizeof(GLbyte); + case GL_UNSIGNED_SHORT: + return sizeof(GLushort); + case GL_SHORT: + return sizeof(GLshort); + case GL_UNSIGNED_INT: + return sizeof(GLuint); + case GL_INT: + return sizeof(GLint); + case GL_HALF_FLOAT_ARB: + return sizeof(GLhalfARB); + case GL_FLOAT: + return sizeof(GLfloat); + case GL_UNSIGNED_BYTE_3_3_2: + return sizeof(GLubyte); + case GL_UNSIGNED_BYTE_2_3_3_REV: + return sizeof(GLubyte); + case GL_UNSIGNED_SHORT_5_6_5: + return sizeof(GLushort); + case GL_UNSIGNED_SHORT_5_6_5_REV: + return sizeof(GLushort); + case GL_UNSIGNED_SHORT_4_4_4_4: + return sizeof(GLushort); + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + return sizeof(GLushort); + case GL_UNSIGNED_SHORT_5_5_5_1: + return sizeof(GLushort); + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + return sizeof(GLushort); + case GL_UNSIGNED_INT_8_8_8_8: + return sizeof(GLuint); + case GL_UNSIGNED_INT_8_8_8_8_REV: + return sizeof(GLuint); + case GL_UNSIGNED_INT_10_10_10_2: + return sizeof(GLuint); + case GL_UNSIGNED_INT_2_10_10_10_REV: + return sizeof(GLuint); + case GL_UNSIGNED_SHORT_8_8_MESA: + case GL_UNSIGNED_SHORT_8_8_REV_MESA: + return sizeof(GLushort); + case GL_UNSIGNED_INT_24_8_EXT: + return sizeof(GLuint); + default: + return -1; + } +} + + +/** + * Get the number of components in a pixel format. + * + * \param format pixel format. + * + * \return the number of components in the given format, or -1 if a bad format. + */ +GLint +_mesa_components_in_format( GLenum format ) +{ + switch (format) { + case GL_COLOR_INDEX: + case GL_COLOR_INDEX1_EXT: + case GL_COLOR_INDEX2_EXT: + case GL_COLOR_INDEX4_EXT: + case GL_COLOR_INDEX8_EXT: + case GL_COLOR_INDEX12_EXT: + case GL_COLOR_INDEX16_EXT: + case GL_STENCIL_INDEX: + case GL_DEPTH_COMPONENT: + case GL_RED: + case GL_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; + case GL_DEPTH_STENCIL_EXT: + return 2; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + return 2; + default: + return -1; + } +} + + +/** + * Get the bytes per pixel of pixel format type pair. + * + * \param format pixel format. + * \param type pixel type. + * + * \return bytes per pixel, or -1 if a bad format or type was given. + */ +GLint +_mesa_bytes_per_pixel( GLenum format, GLenum type ) +{ + GLint comps = _mesa_components_in_format( format ); + if (comps < 0) + return -1; + + switch (type) { + case GL_BITMAP: + return 0; /* special case */ + case GL_BYTE: + case GL_UNSIGNED_BYTE: + return comps * sizeof(GLubyte); + case GL_SHORT: + case GL_UNSIGNED_SHORT: + return comps * sizeof(GLshort); + case GL_INT: + case GL_UNSIGNED_INT: + return comps * sizeof(GLint); + case GL_FLOAT: + return comps * sizeof(GLfloat); + case GL_HALF_FLOAT_ARB: + return comps * sizeof(GLhalfARB); + case GL_UNSIGNED_BYTE_3_3_2: + case GL_UNSIGNED_BYTE_2_3_3_REV: + if (format == GL_RGB || format == GL_BGR) + return sizeof(GLubyte); + else + return -1; /* error */ + case GL_UNSIGNED_SHORT_5_6_5: + case GL_UNSIGNED_SHORT_5_6_5_REV: + if (format == GL_RGB || format == GL_BGR) + return sizeof(GLushort); + else + return -1; /* error */ + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + case GL_UNSIGNED_SHORT_5_5_5_1: + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT) + return sizeof(GLushort); + else + return -1; + case GL_UNSIGNED_INT_8_8_8_8: + case GL_UNSIGNED_INT_8_8_8_8_REV: + case GL_UNSIGNED_INT_10_10_10_2: + case GL_UNSIGNED_INT_2_10_10_10_REV: + if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT) + return sizeof(GLuint); + else + return -1; + case GL_UNSIGNED_SHORT_8_8_MESA: + case GL_UNSIGNED_SHORT_8_8_REV_MESA: + if (format == GL_YCBCR_MESA) + return sizeof(GLushort); + else + return -1; + case GL_UNSIGNED_INT_24_8_EXT: + if (format == GL_DEPTH_STENCIL_EXT) + return sizeof(GLuint); + else + return -1; + default: + return -1; + } +} + + +/** + * Test for a legal pixel format and type. + * + * \param format pixel format. + * \param type pixel type. + * + * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE + * otherwise. + */ +GLboolean +_mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type ) +{ + switch (format) { + case GL_COLOR_INDEX: + case GL_STENCIL_INDEX: + switch (type) { + case GL_BITMAP: + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + return GL_TRUE; + case GL_HALF_FLOAT_ARB: + return ctx->Extensions.ARB_half_float_pixel; + default: + return GL_FALSE; + } + case GL_RED: + case GL_GREEN: + case GL_BLUE: + case GL_ALPHA: +#if 0 /* not legal! see table 3.6 of the 1.5 spec */ + case GL_INTENSITY: +#endif + case GL_LUMINANCE: + case GL_LUMINANCE_ALPHA: + case GL_DEPTH_COMPONENT: + switch (type) { + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + return GL_TRUE; + case GL_HALF_FLOAT_ARB: + return ctx->Extensions.ARB_half_float_pixel; + default: + return GL_FALSE; + } + case GL_RGB: + switch (type) { + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + case GL_UNSIGNED_BYTE_3_3_2: + case GL_UNSIGNED_BYTE_2_3_3_REV: + case GL_UNSIGNED_SHORT_5_6_5: + case GL_UNSIGNED_SHORT_5_6_5_REV: + return GL_TRUE; + case GL_HALF_FLOAT_ARB: + return ctx->Extensions.ARB_half_float_pixel; + default: + return GL_FALSE; + } + case GL_BGR: + switch (type) { + /* NOTE: no packed types are supported with BGR. That's + * intentional, according to the GL spec. + */ + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + return GL_TRUE; + case GL_HALF_FLOAT_ARB: + return ctx->Extensions.ARB_half_float_pixel; + default: + return GL_FALSE; + } + case GL_RGBA: + case GL_BGRA: + case GL_ABGR_EXT: + switch (type) { + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + case GL_UNSIGNED_SHORT_5_5_5_1: + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + case GL_UNSIGNED_INT_8_8_8_8: + case GL_UNSIGNED_INT_8_8_8_8_REV: + case GL_UNSIGNED_INT_10_10_10_2: + case GL_UNSIGNED_INT_2_10_10_10_REV: + return GL_TRUE; + case GL_HALF_FLOAT_ARB: + return ctx->Extensions.ARB_half_float_pixel; + default: + return GL_FALSE; + } + case GL_YCBCR_MESA: + if (type == GL_UNSIGNED_SHORT_8_8_MESA || + type == GL_UNSIGNED_SHORT_8_8_REV_MESA) + return GL_TRUE; + else + return GL_FALSE; + case GL_DEPTH_STENCIL_EXT: + if (ctx->Extensions.EXT_packed_depth_stencil + && type == GL_UNSIGNED_INT_24_8_EXT) + return GL_TRUE; + else + return GL_FALSE; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + switch (type) { + case GL_BYTE: + case GL_UNSIGNED_BYTE: + case GL_SHORT: + case GL_UNSIGNED_SHORT: + case GL_INT: + case GL_UNSIGNED_INT: + case GL_FLOAT: + return GL_TRUE; + default: + return GL_FALSE; + } + default: + ; /* fall-through */ + } + return GL_FALSE; +} + + +/** + * Test if the given image format is a color/RGBA format (i.e., not color + * index, depth, stencil, etc). + * \param format the image format value (may by an internal texture format) + * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise. + */ +GLboolean +_mesa_is_color_format(GLenum format) +{ + switch (format) { + case GL_RED: + case GL_GREEN: + case GL_BLUE: + case GL_ALPHA: + case GL_ALPHA4: + case GL_ALPHA8: + case GL_ALPHA12: + case GL_ALPHA16: + case 1: + case GL_LUMINANCE: + case GL_LUMINANCE4: + case GL_LUMINANCE8: + case GL_LUMINANCE12: + case GL_LUMINANCE16: + case 2: + case GL_LUMINANCE_ALPHA: + case GL_LUMINANCE4_ALPHA4: + case GL_LUMINANCE6_ALPHA2: + case GL_LUMINANCE8_ALPHA8: + case GL_LUMINANCE12_ALPHA4: + case GL_LUMINANCE12_ALPHA12: + case GL_LUMINANCE16_ALPHA16: + case GL_INTENSITY: + case GL_INTENSITY4: + case GL_INTENSITY8: + case GL_INTENSITY12: + case GL_INTENSITY16: + case 3: + case GL_RGB: + case GL_BGR: + case GL_R3_G3_B2: + case GL_RGB4: + case GL_RGB5: + case GL_RGB8: + case GL_RGB10: + case GL_RGB12: + case GL_RGB16: + case 4: + case GL_ABGR_EXT: + case GL_RGBA: + case GL_BGRA: + case GL_RGBA2: + case GL_RGBA4: + case GL_RGB5_A1: + case GL_RGBA8: + case GL_RGB10_A2: + case GL_RGBA12: + case GL_RGBA16: + /* float texture formats */ + case GL_ALPHA16F_ARB: + case GL_ALPHA32F_ARB: + case GL_LUMINANCE16F_ARB: + case GL_LUMINANCE32F_ARB: + case GL_LUMINANCE_ALPHA16F_ARB: + case GL_LUMINANCE_ALPHA32F_ARB: + case GL_INTENSITY16F_ARB: + case GL_INTENSITY32F_ARB: + case GL_RGB16F_ARB: + case GL_RGB32F_ARB: + case GL_RGBA16F_ARB: + case GL_RGBA32F_ARB: + /* compressed formats */ + case GL_COMPRESSED_ALPHA: + case GL_COMPRESSED_LUMINANCE: + case GL_COMPRESSED_LUMINANCE_ALPHA: + case GL_COMPRESSED_INTENSITY: + case GL_COMPRESSED_RGB: + case GL_COMPRESSED_RGBA: + case GL_RGB_S3TC: + case GL_RGB4_S3TC: + case GL_RGBA_S3TC: + case GL_RGBA4_S3TC: + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: + case GL_COMPRESSED_RGB_FXT1_3DFX: + case GL_COMPRESSED_RGBA_FXT1_3DFX: +#if FEATURE_EXT_texture_sRGB + case GL_SRGB_EXT: + case GL_SRGB8_EXT: + case GL_SRGB_ALPHA_EXT: + case GL_SRGB8_ALPHA8_EXT: + case GL_SLUMINANCE_ALPHA_EXT: + case GL_SLUMINANCE8_ALPHA8_EXT: + case GL_SLUMINANCE_EXT: + case GL_SLUMINANCE8_EXT: + case GL_COMPRESSED_SRGB_EXT: + case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_SRGB_ALPHA_EXT: + case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: + case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: + case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: + case GL_COMPRESSED_SLUMINANCE_EXT: + case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT: +#endif /* FEATURE_EXT_texture_sRGB */ + return GL_TRUE; + /* signed texture formats */ + case GL_RGBA_SNORM: + case GL_RGBA8_SNORM: + return GL_TRUE; + case GL_YCBCR_MESA: /* not considered to be RGB */ + /* fall-through */ + default: + return GL_FALSE; + } +} + + +/** + * Test if the given image format is a color index format. + */ +GLboolean +_mesa_is_index_format(GLenum format) +{ + switch (format) { + case GL_COLOR_INDEX: + case GL_COLOR_INDEX1_EXT: + case GL_COLOR_INDEX2_EXT: + case GL_COLOR_INDEX4_EXT: + case GL_COLOR_INDEX8_EXT: + case GL_COLOR_INDEX12_EXT: + case GL_COLOR_INDEX16_EXT: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Test if the given image format is a depth component format. + */ +GLboolean +_mesa_is_depth_format(GLenum format) +{ + switch (format) { + case GL_DEPTH_COMPONENT: + case GL_DEPTH_COMPONENT16: + case GL_DEPTH_COMPONENT24: + case GL_DEPTH_COMPONENT32: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Test if the given image format is a stencil format. + */ +GLboolean +_mesa_is_stencil_format(GLenum format) +{ + switch (format) { + case GL_STENCIL_INDEX: + case GL_DEPTH_STENCIL: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Test if the given image format is a YCbCr format. + */ +GLboolean +_mesa_is_ycbcr_format(GLenum format) +{ + switch (format) { + case GL_YCBCR_MESA: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Test if the given image format is a depth+stencil format. + */ +GLboolean +_mesa_is_depthstencil_format(GLenum format) +{ + switch (format) { + case GL_DEPTH24_STENCIL8_EXT: + case GL_DEPTH_STENCIL_EXT: + return GL_TRUE; + default: + return GL_FALSE; + } +} + +/** + * Test if the given image format is a dudv format. + */ +GLboolean +_mesa_is_dudv_format(GLenum format) +{ + switch (format) { + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * Return the address of a specific pixel in an image (1D, 2D or 3D). + * + * Pixel unpacking/packing parameters are observed according to \p packing. + * + * \param dimensions either 1, 2 or 3 to indicate dimensionality of image + * \param image starting address of image data + * \param width the image width + * \param height theimage height + * \param format the pixel format + * \param type the pixel data type + * \param packing the pixelstore attributes + * \param img which image in the volume (0 for 1D or 2D images) + * \param row row of pixel in the image (0 for 1D images) + * \param column column of pixel in the image + * + * \return address of pixel on success, or NULL on error. + * + * \sa gl_pixelstore_attrib. + */ +GLvoid * +_mesa_image_address( GLuint dimensions, + const struct gl_pixelstore_attrib *packing, + const GLvoid *image, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + GLint img, GLint row, GLint column ) +{ + GLint alignment; /* 1, 2 or 4 */ + GLint pixels_per_row; + GLint rows_per_image; + GLint skiprows; + GLint skippixels; + GLint skipimages; /* for 3-D volume images */ + GLubyte *pixel_addr; + + ASSERT(dimensions >= 1 && dimensions <= 3); + + alignment = packing->Alignment; + if (packing->RowLength > 0) { + pixels_per_row = packing->RowLength; + } + else { + pixels_per_row = width; + } + if (packing->ImageHeight > 0) { + rows_per_image = packing->ImageHeight; + } + else { + rows_per_image = height; + } + + skippixels = packing->SkipPixels; + /* Note: SKIP_ROWS _is_ used for 1D images */ + skiprows = packing->SkipRows; + /* Note: SKIP_IMAGES is only used for 3D images */ + skipimages = (dimensions == 3) ? packing->SkipImages : 0; + + if (type == GL_BITMAP) { + /* BITMAP data */ + GLint comp_per_pixel; /* components per pixel */ + GLint bytes_per_comp; /* bytes per component */ + GLint bytes_per_row; + GLint bytes_per_image; + + /* Compute bytes per component */ + bytes_per_comp = _mesa_sizeof_packed_type( type ); + if (bytes_per_comp < 0) { + return NULL; + } + + /* Compute number of components per pixel */ + comp_per_pixel = _mesa_components_in_format( format ); + if (comp_per_pixel < 0) { + return NULL; + } + + bytes_per_row = alignment + * CEILING( comp_per_pixel*pixels_per_row, 8*alignment ); + + bytes_per_image = bytes_per_row * rows_per_image; + + pixel_addr = (GLubyte *) image + + (skipimages + img) * bytes_per_image + + (skiprows + row) * bytes_per_row + + (skippixels + column) / 8; + } + else { + /* Non-BITMAP data */ + GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image; + GLint topOfImage; + + bytes_per_pixel = _mesa_bytes_per_pixel( format, type ); + + /* The pixel type and format should have been error checked earlier */ + assert(bytes_per_pixel > 0); + + bytes_per_row = pixels_per_row * bytes_per_pixel; + remainder = bytes_per_row % alignment; + if (remainder > 0) + bytes_per_row += (alignment - remainder); + + ASSERT(bytes_per_row % alignment == 0); + + bytes_per_image = bytes_per_row * rows_per_image; + + if (packing->Invert) { + /* set pixel_addr to the last row */ + topOfImage = bytes_per_row * (height - 1); + bytes_per_row = -bytes_per_row; + } + else { + topOfImage = 0; + } + + /* compute final pixel address */ + pixel_addr = (GLubyte *) image + + (skipimages + img) * bytes_per_image + + topOfImage + + (skiprows + row) * bytes_per_row + + (skippixels + column) * bytes_per_pixel; + } + + return (GLvoid *) pixel_addr; +} + + +GLvoid * +_mesa_image_address1d( const struct gl_pixelstore_attrib *packing, + const GLvoid *image, + GLsizei width, + GLenum format, GLenum type, + GLint column ) +{ + return _mesa_image_address(1, packing, image, width, 1, + format, type, 0, 0, column); +} + + +GLvoid * +_mesa_image_address2d( const struct gl_pixelstore_attrib *packing, + const GLvoid *image, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + GLint row, GLint column ) +{ + return _mesa_image_address(2, packing, image, width, height, + format, type, 0, row, column); +} + + +GLvoid * +_mesa_image_address3d( const struct gl_pixelstore_attrib *packing, + const GLvoid *image, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + GLint img, GLint row, GLint column ) +{ + return _mesa_image_address(3, packing, image, width, height, + format, type, img, row, column); +} + + + +/** + * Compute the stride (in bytes) between image rows. + * + * \param packing the pixelstore attributes + * \param width image width. + * \param format pixel format. + * \param type pixel data type. + * + * \return the stride in bytes for the given parameters, or -1 if error + */ +GLint +_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing, + GLint width, GLenum format, GLenum type ) +{ + GLint bytesPerRow, remainder; + + ASSERT(packing); + + if (type == GL_BITMAP) { + if (packing->RowLength == 0) { + bytesPerRow = (width + 7) / 8; + } + else { + bytesPerRow = (packing->RowLength + 7) / 8; + } + } + else { + /* Non-BITMAP data */ + const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type); + if (bytesPerPixel <= 0) + return -1; /* error */ + if (packing->RowLength == 0) { + bytesPerRow = bytesPerPixel * width; + } + else { + bytesPerRow = bytesPerPixel * packing->RowLength; + } + } + + remainder = bytesPerRow % packing->Alignment; + if (remainder > 0) { + bytesPerRow += (packing->Alignment - remainder); + } + + if (packing->Invert) { + /* negate the bytes per row (negative row stride) */ + bytesPerRow = -bytesPerRow; + } + + return bytesPerRow; +} + + +#if _HAVE_FULL_GL + +/* + * Compute the stride between images in a 3D texture (in bytes) for the given + * pixel packing parameters and image width, format and type. + */ +GLint +_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing, + GLint width, GLint height, + GLenum format, GLenum type ) +{ + GLint bytesPerRow, bytesPerImage, remainder; + + ASSERT(packing); + + if (type == GL_BITMAP) { + if (packing->RowLength == 0) { + bytesPerRow = (width + 7) / 8; + } + else { + bytesPerRow = (packing->RowLength + 7) / 8; + } + } + else { + const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type); + + if (bytesPerPixel <= 0) + return -1; /* error */ + if (packing->RowLength == 0) { + bytesPerRow = bytesPerPixel * width; + } + else { + bytesPerRow = bytesPerPixel * packing->RowLength; + } + } + + remainder = bytesPerRow % packing->Alignment; + if (remainder > 0) + bytesPerRow += (packing->Alignment - remainder); + + if (packing->ImageHeight == 0) + bytesPerImage = bytesPerRow * height; + else + bytesPerImage = bytesPerRow * packing->ImageHeight; + + return bytesPerImage; +} + + +/* + * Unpack a 32x32 pixel polygon stipple from user memory using the + * current pixel unpack settings. + */ +void +_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32], + const struct gl_pixelstore_attrib *unpacking ) +{ + GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking); + if (ptrn) { + /* Convert pattern from GLubytes to GLuints and handle big/little + * endian differences + */ + GLubyte *p = ptrn; + GLint i; + for (i = 0; i < 32; i++) { + dest[i] = (p[0] << 24) + | (p[1] << 16) + | (p[2] << 8) + | (p[3] ); + p += 4; + } + _mesa_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 *) _mesa_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) { + _mesa_free(buffer); + return NULL; + } + + if ((packing->SkipPixels & 7) == 0) { + _mesa_memcpy( dst, src, width_in_bytes ); + if (packing->LsbFirst) { + flip_bytes( dst, width_in_bytes ); + } + } + else { + /* handling SkipPixels is a bit tricky (no pun intended!) */ + GLint i; + if (packing->LsbFirst) { + GLubyte srcMask = 1 << (packing->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 128) { + srcMask = 1; + s++; + } + else { + srcMask = srcMask << 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + else { + GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 1) { + srcMask = 128; + s++; + } + else { + srcMask = srcMask >> 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + } + dst += width_in_bytes; + } + + return buffer; +} + + +/* + * Pack bitmap data. + */ +void +_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source, + GLubyte *dest, const struct gl_pixelstore_attrib *packing ) +{ + GLint row, width_in_bytes; + const GLubyte *src; + + if (!source) + return; + + width_in_bytes = CEILING( width, 8 ); + src = source; + for (row = 0; row < height; row++) { + GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dest, + width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); + if (!dst) + return; + + if ((packing->SkipPixels & 7) == 0) { + _mesa_memcpy( dst, src, width_in_bytes ); + if (packing->LsbFirst) { + flip_bytes( dst, width_in_bytes ); + } + } + else { + /* handling SkipPixels is a bit tricky (no pun intended!) */ + GLint i; + if (packing->LsbFirst) { + GLubyte srcMask = 128; + GLubyte dstMask = 1 << (packing->SkipPixels & 0x7); + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 1) { + srcMask = 128; + s++; + } + else { + srcMask = srcMask >> 1; + } + if (dstMask == 128) { + dstMask = 1; + d++; + *d = 0; + } + else { + dstMask = dstMask << 1; + } + } + } + else { + GLubyte srcMask = 128; + GLubyte dstMask = 128 >> (packing->SkipPixels & 0x7); + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 1) { + srcMask = 128; + s++; + } + else { + srcMask = srcMask >> 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + } + src += width_in_bytes; + } +} + + +/** + * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel. + * This is typically used to convert a bitmap into a GLubyte/pixel texture. + * "On" bits will set texels to \p onValue. + * "Off" bits will not modify texels. + * \param width src bitmap width in pixels + * \param height src bitmap height in pixels + * \param unpack bitmap unpacking state + * \param bitmap the src bitmap data + * \param destBuffer start of dest buffer + * \param destStride row stride in dest buffer + * \param onValue if bit is 1, set destBuffer pixel to this value + */ +void +_mesa_expand_bitmap(GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap, + GLubyte *destBuffer, GLint destStride, + GLubyte onValue) +{ + const GLubyte *srcRow = (const GLubyte *) + _mesa_image_address2d(unpack, bitmap, width, height, + GL_COLOR_INDEX, GL_BITMAP, 0, 0); + const GLint srcStride = _mesa_image_row_stride(unpack, width, + GL_COLOR_INDEX, GL_BITMAP); + GLint row, col; + +#define SET_PIXEL(COL, ROW) \ + destBuffer[(ROW) * destStride + (COL)] = onValue; + + for (row = 0; row < height; row++) { + const GLubyte *src = srcRow; + + if (unpack->LsbFirst) { + /* Lsb first */ + GLubyte mask = 1U << (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 128U) { + src++; + mask = 1U; + } + else { + mask = mask << 1; + } + } + + /* get ready for next row */ + if (mask != 1) + src++; + } + else { + /* Msb first */ + GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 1U) { + src++; + mask = 128U; + } + else { + mask = mask >> 1; + } + } + + /* get ready for next row */ + if (mask != 128) + src++; + } + + srcRow += srcStride; + } /* row */ + +#undef SET_PIXEL +} + + +/**********************************************************************/ +/***** Pixel processing functions ******/ +/**********************************************************************/ + +/* + * Apply scale and bias factors to an array of RGBA pixels. + */ +void +_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4], + GLfloat rScale, GLfloat gScale, + GLfloat bScale, GLfloat aScale, + GLfloat rBias, GLfloat gBias, + GLfloat bBias, GLfloat aBias) +{ + if (rScale != 1.0 || rBias != 0.0) { + GLuint i; + for (i = 0; i < n; i++) { + rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias; + } + } + if (gScale != 1.0 || gBias != 0.0) { + GLuint i; + for (i = 0; i < n; i++) { + rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias; + } + } + if (bScale != 1.0 || bBias != 0.0) { + GLuint i; + for (i = 0; i < n; i++) { + rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias; + } + } + if (aScale != 1.0 || aBias != 0.0) { + GLuint i; + for (i = 0; i < n; i++) { + rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias; + } + } +} + + +/* + * Apply pixel mapping to an array of floating point RGBA pixels. + */ +void +_mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] ) +{ + const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1); + const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1); + const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1); + const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1); + const GLfloat *rMap = ctx->PixelMaps.RtoR.Map; + const GLfloat *gMap = ctx->PixelMaps.GtoG.Map; + const GLfloat *bMap = ctx->PixelMaps.BtoB.Map; + const GLfloat *aMap = ctx->PixelMaps.AtoA.Map; + GLuint i; + for (i=0;i<n;i++) { + GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F); + GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F); + GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F); + GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F); + rgba[i][RCOMP] = rMap[IROUND(r * rscale)]; + rgba[i][GCOMP] = gMap[IROUND(g * gscale)]; + rgba[i][BCOMP] = bMap[IROUND(b * bscale)]; + rgba[i][ACOMP] = aMap[IROUND(a * ascale)]; + } +} + + +/* + * Apply the color matrix and post color matrix scaling and biasing. + */ +void +_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4]) +{ + const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0]; + const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0]; + const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1]; + const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1]; + const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2]; + const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2]; + const GLfloat as = ctx->Pixel.PostColorMatrixScale[3]; + const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3]; + const GLfloat *m = ctx->ColorMatrixStack.Top->m; + GLuint i; + for (i = 0; i < n; i++) { + const GLfloat r = rgba[i][RCOMP]; + const GLfloat g = rgba[i][GCOMP]; + const GLfloat b = rgba[i][BCOMP]; + const GLfloat a = rgba[i][ACOMP]; + rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb; + rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb; + rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb; + rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab; + } +} + + +/** + * Apply a color table lookup to an array of floating point RGBA colors. + */ +void +_mesa_lookup_rgba_float(const struct gl_color_table *table, + GLuint n, GLfloat rgba[][4]) +{ + const GLint max = table->Size - 1; + const GLfloat scale = (GLfloat) max; + const GLfloat *lut = table->TableF; + GLuint i; + + if (!table->TableF || table->Size == 0) + return; + + switch (table->_BaseFormat) { + case GL_INTENSITY: + /* replace RGBA with I */ + for (i = 0; i < n; i++) { + GLint j = IROUND(rgba[i][RCOMP] * scale); + GLfloat c = lut[CLAMP(j, 0, max)]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = + rgba[i][ACOMP] = c; + } + break; + case GL_LUMINANCE: + /* replace RGB with L */ + for (i = 0; i < n; i++) { + GLint j = IROUND(rgba[i][RCOMP] * scale); + GLfloat c = lut[CLAMP(j, 0, max)]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = c; + } + break; + case GL_ALPHA: + /* replace A with A */ + for (i = 0; i < n; i++) { + GLint j = IROUND(rgba[i][ACOMP] * scale); + rgba[i][ACOMP] = lut[CLAMP(j, 0, max)]; + } + break; + case GL_LUMINANCE_ALPHA: + /* replace RGBA with LLLA */ + for (i = 0; i < n; i++) { + GLint jL = IROUND(rgba[i][RCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); + GLfloat luminance, alpha; + jL = CLAMP(jL, 0, max); + jA = CLAMP(jA, 0, max); + luminance = lut[jL * 2 + 0]; + alpha = lut[jA * 2 + 1]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = luminance; + rgba[i][ACOMP] = alpha;; + } + break; + case GL_RGB: + /* replace RGB with RGB */ + for (i = 0; i < n; i++) { + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); + jR = CLAMP(jR, 0, max); + jG = CLAMP(jG, 0, max); + jB = CLAMP(jB, 0, max); + rgba[i][RCOMP] = lut[jR * 3 + 0]; + rgba[i][GCOMP] = lut[jG * 3 + 1]; + rgba[i][BCOMP] = lut[jB * 3 + 2]; + } + break; + case GL_RGBA: + /* replace RGBA with RGBA */ + for (i = 0; i < n; i++) { + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); + jR = CLAMP(jR, 0, max); + jG = CLAMP(jG, 0, max); + jB = CLAMP(jB, 0, max); + jA = CLAMP(jA, 0, max); + rgba[i][RCOMP] = lut[jR * 4 + 0]; + rgba[i][GCOMP] = lut[jG * 4 + 1]; + rgba[i][BCOMP] = lut[jB * 4 + 2]; + rgba[i][ACOMP] = lut[jA * 4 + 3]; + } + break; + default: + _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float"); + return; + } +} + + + +/** + * Apply a color table lookup to an array of ubyte/RGBA colors. + */ +void +_mesa_lookup_rgba_ubyte(const struct gl_color_table *table, + GLuint n, GLubyte rgba[][4]) +{ + const GLubyte *lut = table->TableUB; + const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0; + GLuint i; + + if (!table->TableUB || table->Size == 0) + return; + + switch (table->_BaseFormat) { + case GL_INTENSITY: + /* replace RGBA with I */ + if (table->Size == 256) { + for (i = 0; i < n; i++) { + const GLubyte c = lut[rgba[i][RCOMP]]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = + rgba[i][ACOMP] = c; + } + } + else { + for (i = 0; i < n; i++) { + GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = + rgba[i][ACOMP] = lut[j]; + } + } + break; + case GL_LUMINANCE: + /* replace RGB with L */ + if (table->Size == 256) { + for (i = 0; i < n; i++) { + const GLubyte c = lut[rgba[i][RCOMP]]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = c; + } + } + else { + for (i = 0; i < n; i++) { + GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = lut[j]; + } + } + break; + case GL_ALPHA: + /* replace A with A */ + if (table->Size == 256) { + for (i = 0; i < n; i++) { + rgba[i][ACOMP] = lut[rgba[i][ACOMP]]; + } + } + else { + for (i = 0; i < n; i++) { + GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale); + rgba[i][ACOMP] = lut[j]; + } + } + break; + case GL_LUMINANCE_ALPHA: + /* replace RGBA with LLLA */ + if (table->Size == 256) { + for (i = 0; i < n; i++) { + GLubyte l = lut[rgba[i][RCOMP] * 2 + 0]; + GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = l; + rgba[i][ACOMP] = a; + } + } + else { + for (i = 0; i < n; i++) { + GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale); + GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); + GLubyte luminance = lut[jL * 2 + 0]; + GLubyte alpha = lut[jA * 2 + 1]; + rgba[i][RCOMP] = + rgba[i][GCOMP] = + rgba[i][BCOMP] = luminance; + rgba[i][ACOMP] = alpha; + } + } + break; + case GL_RGB: + if (table->Size == 256) { + for (i = 0; i < n; i++) { + rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0]; + rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1]; + rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2]; + } + } + else { + for (i = 0; i < n; i++) { + GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); + GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); + GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); + rgba[i][RCOMP] = lut[jR * 3 + 0]; + rgba[i][GCOMP] = lut[jG * 3 + 1]; + rgba[i][BCOMP] = lut[jB * 3 + 2]; + } + } + break; + case GL_RGBA: + if (table->Size == 256) { + for (i = 0; i < n; i++) { + rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0]; + rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1]; + rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2]; + rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3]; + } + } + else { + for (i = 0; i < n; i++) { + GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); + GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); + GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); + GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); + CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]); + CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]); + CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]); + CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]); + } + } + break; + default: + _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan"); + return; + } +} + + + +/* + * Map color indexes to float rgba values. + */ +void +_mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n, + const GLuint index[], GLfloat rgba[][4] ) +{ + GLuint rmask = ctx->PixelMaps.ItoR.Size - 1; + GLuint gmask = ctx->PixelMaps.ItoG.Size - 1; + GLuint bmask = ctx->PixelMaps.ItoB.Size - 1; + GLuint amask = ctx->PixelMaps.ItoA.Size - 1; + const GLfloat *rMap = ctx->PixelMaps.ItoR.Map; + const GLfloat *gMap = ctx->PixelMaps.ItoG.Map; + const GLfloat *bMap = ctx->PixelMaps.ItoB.Map; + const GLfloat *aMap = ctx->PixelMaps.ItoA.Map; + GLuint i; + for (i=0;i<n;i++) { + rgba[i][RCOMP] = rMap[index[i] & rmask]; + rgba[i][GCOMP] = gMap[index[i] & gmask]; + rgba[i][BCOMP] = bMap[index[i] & bmask]; + rgba[i][ACOMP] = aMap[index[i] & amask]; + } +} + + +/** + * Map ubyte color indexes to ubyte/RGBA values. + */ +void +_mesa_map_ci8_to_rgba8(const GLcontext *ctx, GLuint n, const GLubyte index[], + GLubyte rgba[][4]) +{ + GLuint rmask = ctx->PixelMaps.ItoR.Size - 1; + GLuint gmask = ctx->PixelMaps.ItoG.Size - 1; + GLuint bmask = ctx->PixelMaps.ItoB.Size - 1; + GLuint amask = ctx->PixelMaps.ItoA.Size - 1; + const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8; + const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8; + const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8; + const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8; + GLuint i; + for (i=0;i<n;i++) { + rgba[i][RCOMP] = rMap[index[i] & rmask]; + rgba[i][GCOMP] = gMap[index[i] & gmask]; + rgba[i][BCOMP] = bMap[index[i] & bmask]; + rgba[i][ACOMP] = aMap[index[i] & amask]; + } +} + + +void +_mesa_scale_and_bias_depth(const GLcontext *ctx, GLuint n, + GLfloat depthValues[]) +{ + const GLfloat scale = ctx->Pixel.DepthScale; + const GLfloat bias = ctx->Pixel.DepthBias; + GLuint i; + for (i = 0; i < n; i++) { + GLfloat d = depthValues[i] * scale + bias; + depthValues[i] = CLAMP(d, 0.0F, 1.0F); + } +} + + +void +_mesa_scale_and_bias_depth_uint(const GLcontext *ctx, GLuint n, + GLuint depthValues[]) +{ + const GLdouble max = (double) 0xffffffff; + const GLdouble scale = ctx->Pixel.DepthScale; + const GLdouble bias = ctx->Pixel.DepthBias * max; + GLuint i; + for (i = 0; i < n; i++) { + GLdouble d = (GLdouble) depthValues[i] * scale + bias; + d = CLAMP(d, 0.0, max); + depthValues[i] = (GLuint) d; + } +} + + + +/* + * Update the min/max values from an array of fragment colors. + */ +static void +update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4]) +{ + GLuint i; + for (i = 0; i < n; i++) { + /* update mins */ + if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP]) + ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP]; + if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP]) + ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP]; + if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP]) + ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP]; + if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP]) + ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP]; + + /* update maxs */ + if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP]) + ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP]; + if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP]) + ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP]; + if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP]) + ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP]; + if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP]) + ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP]; + } +} + + +/* + * Update the histogram values from an array of fragment colors. + */ +static void +update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4]) +{ + const GLint max = ctx->Histogram.Width - 1; + GLfloat w = (GLfloat) max; + GLuint i; + + if (ctx->Histogram.Width == 0) + return; + + for (i = 0; i < n; i++) { + GLint ri = IROUND(rgba[i][RCOMP] * w); + GLint gi = IROUND(rgba[i][GCOMP] * w); + GLint bi = IROUND(rgba[i][BCOMP] * w); + GLint ai = IROUND(rgba[i][ACOMP] * w); + ri = CLAMP(ri, 0, max); + gi = CLAMP(gi, 0, max); + bi = CLAMP(bi, 0, max); + ai = CLAMP(ai, 0, max); + ctx->Histogram.Count[ri][RCOMP]++; + ctx->Histogram.Count[gi][GCOMP]++; + ctx->Histogram.Count[bi][BCOMP]++; + ctx->Histogram.Count[ai][ACOMP]++; + } +} + + +/** + * Apply various pixel transfer operations to an array of RGBA pixels + * as indicated by the transferOps bitmask + */ +void +_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps, + GLuint n, GLfloat rgba[][4]) +{ + /* scale & bias */ + if (transferOps & IMAGE_SCALE_BIAS_BIT) { + _mesa_scale_and_bias_rgba(n, rgba, + ctx->Pixel.RedScale, ctx->Pixel.GreenScale, + ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale, + ctx->Pixel.RedBias, ctx->Pixel.GreenBias, + ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias); + } + /* color map lookup */ + if (transferOps & IMAGE_MAP_COLOR_BIT) { + _mesa_map_rgba( ctx, n, rgba ); + } + /* GL_COLOR_TABLE lookup */ + if (transferOps & IMAGE_COLOR_TABLE_BIT) { + _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba); + } + /* convolution */ + if (transferOps & IMAGE_CONVOLUTION_BIT) { + /* this has to be done in the calling code */ + _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops"); + } + /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */ + if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) { + _mesa_scale_and_bias_rgba(n, rgba, + ctx->Pixel.PostConvolutionScale[RCOMP], + ctx->Pixel.PostConvolutionScale[GCOMP], + ctx->Pixel.PostConvolutionScale[BCOMP], + ctx->Pixel.PostConvolutionScale[ACOMP], + ctx->Pixel.PostConvolutionBias[RCOMP], + ctx->Pixel.PostConvolutionBias[GCOMP], + ctx->Pixel.PostConvolutionBias[BCOMP], + ctx->Pixel.PostConvolutionBias[ACOMP]); + } + /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */ + if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) { + _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba); + } + /* color matrix transform */ + if (transferOps & IMAGE_COLOR_MATRIX_BIT) { + _mesa_transform_rgba(ctx, n, rgba); + } + /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */ + if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) { + _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba); + } + /* update histogram count */ + if (transferOps & IMAGE_HISTOGRAM_BIT) { + update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba); + } + /* update min/max values */ + if (transferOps & IMAGE_MIN_MAX_BIT) { + update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba); + } + /* clamping to [0,1] */ + if (transferOps & IMAGE_CLAMP_BIT) { + GLuint i; + for (i = 0; i < n; i++) { + rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F); + rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F); + rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F); + rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F); + } + } +} + + +/* + * Apply color index shift and offset to an array of pixels. + */ +static void +shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] ) +{ + GLint shift = ctx->Pixel.IndexShift; + GLint offset = ctx->Pixel.IndexOffset; + GLuint i; + if (shift > 0) { + for (i=0;i<n;i++) { + indexes[i] = (indexes[i] << shift) + offset; + } + } + else if (shift < 0) { + shift = -shift; + for (i=0;i<n;i++) { + indexes[i] = (indexes[i] >> shift) + offset; + } + } + else { + for (i=0;i<n;i++) { + indexes[i] = indexes[i] + offset; + } + } +} + + + +/** + * Apply color index shift, offset and table lookup to an array + * of color indexes; + */ +void +_mesa_apply_ci_transfer_ops(const GLcontext *ctx, GLbitfield transferOps, + GLuint n, GLuint indexes[]) +{ + if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { + shift_and_offset_ci(ctx, n, indexes); + } + if (transferOps & IMAGE_MAP_COLOR_BIT) { + const GLuint mask = ctx->PixelMaps.ItoI.Size - 1; + GLuint i; + for (i = 0; i < n; i++) { + const GLuint j = indexes[i] & mask; + indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]); + } + } +} + + +/** + * Apply stencil index shift, offset and table lookup to an array + * of stencil values. + */ +void +_mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n, + GLstencil stencil[]) +{ + if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) { + const GLint offset = ctx->Pixel.IndexOffset; + GLint shift = ctx->Pixel.IndexShift; + GLuint i; + if (shift > 0) { + for (i = 0; i < n; i++) { + stencil[i] = (stencil[i] << shift) + offset; + } + } + else if (shift < 0) { + shift = -shift; + for (i = 0; i < n; i++) { + stencil[i] = (stencil[i] >> shift) + offset; + } + } + else { + for (i = 0; i < n; i++) { + stencil[i] = stencil[i] + offset; + } + } + } + if (ctx->Pixel.MapStencilFlag) { + GLuint mask = ctx->PixelMaps.StoS.Size - 1; + GLuint i; + for (i = 0; i < n; i++) { + stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ]; + } + } +} + + +/** + * Used to pack an array [][4] of RGBA float colors as specified + * by the dstFormat, dstType and dstPacking. Used by glReadPixels, + * glGetConvolutionFilter(), etc. + * Note: the rgba values will be modified by this function when any pixel + * transfer ops are enabled. + */ +void +_mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4], + GLenum dstFormat, GLenum dstType, + GLvoid *dstAddr, + const struct gl_pixelstore_attrib *dstPacking, + GLbitfield transferOps) +{ + GLfloat luminance[MAX_WIDTH]; + const GLint comps = _mesa_components_in_format(dstFormat); + GLuint i; + + /* XXX + * This test should probably go away. Have the caller set/clear the + * IMAGE_CLAMP_BIT as needed. + */ + if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) { + /* need to clamp to [0, 1] */ + transferOps |= IMAGE_CLAMP_BIT; + } + + if (transferOps) { + _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba); + if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) { + return; + } + } + + if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) { + /* compute luminance values */ + if (transferOps & IMAGE_CLAMP_BIT) { + for (i = 0; i < n; i++) { + GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP]; + luminance[i] = CLAMP(sum, 0.0F, 1.0F); + } + } + else { + for (i = 0; i < n; i++) { + luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP]; + } + } + } + + /* + * Pack/store the pixels. Ugh! Lots of cases!!! + */ + switch (dstType) { + case GL_UNSIGNED_BYTE: + { + GLubyte *dst = (GLubyte *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UBYTE(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]); + dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]); + dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]); + dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_BYTE: + { + GLbyte *dst = (GLbyte *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_BYTE(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]); + dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]); + dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]); + dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLushort *dst = (GLushort *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]); + CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]); + CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_SHORT: + { + GLshort *dst = (GLshort *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_SHORT(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]); + dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]); + dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]); + dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_UNSIGNED_INT: + { + GLuint *dst = (GLuint *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_UINT(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_UINT(luminance[i]); + dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]); + dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]); + dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]); + dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]); + dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]); + dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]); + dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]); + dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]); + dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]); + dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_UINT(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_UINT(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_INT: + { + GLint *dst = (GLint *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = FLOAT_TO_INT(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_INT(luminance[i]); + dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]); + dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]); + dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]); + dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]); + dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]); + dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]); + dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]); + dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]); + dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]); + dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]); + dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]); + dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = FLOAT_TO_INT(rgba[i][RCOMP]); + dst[i*2+1] = FLOAT_TO_INT(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_FLOAT: + { + GLfloat *dst = (GLfloat *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = rgba[i][RCOMP]; + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = rgba[i][GCOMP]; + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = rgba[i][BCOMP]; + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = rgba[i][ACOMP]; + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = luminance[i]; + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = luminance[i]; + dst[i*2+1] = rgba[i][ACOMP]; + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = rgba[i][RCOMP]; + dst[i*3+1] = rgba[i][GCOMP]; + dst[i*3+2] = rgba[i][BCOMP]; + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = rgba[i][RCOMP]; + dst[i*4+1] = rgba[i][GCOMP]; + dst[i*4+2] = rgba[i][BCOMP]; + dst[i*4+3] = rgba[i][ACOMP]; + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = rgba[i][BCOMP]; + dst[i*3+1] = rgba[i][GCOMP]; + dst[i*3+2] = rgba[i][RCOMP]; + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = rgba[i][BCOMP]; + dst[i*4+1] = rgba[i][GCOMP]; + dst[i*4+2] = rgba[i][RCOMP]; + dst[i*4+3] = rgba[i][ACOMP]; + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = rgba[i][ACOMP]; + dst[i*4+1] = rgba[i][BCOMP]; + dst[i*4+2] = rgba[i][GCOMP]; + dst[i*4+3] = rgba[i][RCOMP]; + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = rgba[i][RCOMP]; + dst[i*2+1] = rgba[i][GCOMP]; + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_HALF_FLOAT_ARB: + { + GLhalfARB *dst = (GLhalfARB *) dstAddr; + switch (dstFormat) { + case GL_RED: + for (i=0;i<n;i++) + dst[i] = _mesa_float_to_half(rgba[i][RCOMP]); + break; + case GL_GREEN: + for (i=0;i<n;i++) + dst[i] = _mesa_float_to_half(rgba[i][GCOMP]); + break; + case GL_BLUE: + for (i=0;i<n;i++) + dst[i] = _mesa_float_to_half(rgba[i][BCOMP]); + break; + case GL_ALPHA: + for (i=0;i<n;i++) + dst[i] = _mesa_float_to_half(rgba[i][ACOMP]); + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) + dst[i] = _mesa_float_to_half(luminance[i]); + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + dst[i*2+0] = _mesa_float_to_half(luminance[i]); + dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]); + dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]); + dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]); + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]); + dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]); + dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]); + dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]); + } + break; + case GL_BGR: + for (i=0;i<n;i++) { + dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]); + dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]); + dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]); + } + break; + case GL_BGRA: + for (i=0;i<n;i++) { + dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]); + dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]); + dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]); + dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]); + } + break; + case GL_ABGR_EXT: + for (i=0;i<n;i++) { + dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]); + dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]); + dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]); + dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]); + } + break; + case GL_DUDV_ATI: + case GL_DU8DV8_ATI: + for (i=0;i<n;i++) { + dst[i*2+0] = _mesa_float_to_half(rgba[i][RCOMP]); + dst[i*2+1] = _mesa_float_to_half(rgba[i][GCOMP]); + } + break; + default: + _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n"); + } + } + break; + case GL_UNSIGNED_BYTE_3_3_2: + if (dstFormat == GL_RGB) { + GLubyte *dst = (GLubyte *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) << 5) + | (IROUND(rgba[i][GCOMP] * 7.0F) << 2) + | (IROUND(rgba[i][BCOMP] * 3.0F) ); + } + } + break; + case GL_UNSIGNED_BYTE_2_3_3_REV: + if (dstFormat == GL_RGB) { + GLubyte *dst = (GLubyte *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) ) + | (IROUND(rgba[i][GCOMP] * 7.0F) << 3) + | (IROUND(rgba[i][BCOMP] * 3.0F) << 6); + } + } + break; + case GL_UNSIGNED_SHORT_5_6_5: + if (dstFormat == GL_RGB) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11) + | (IROUND(rgba[i][GCOMP] * 63.0F) << 5) + | (IROUND(rgba[i][BCOMP] * 31.0F) ); + } + } + break; + case GL_UNSIGNED_SHORT_5_6_5_REV: + if (dstFormat == GL_RGB) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) ) + | (IROUND(rgba[i][GCOMP] * 63.0F) << 5) + | (IROUND(rgba[i][BCOMP] * 31.0F) << 11); + } + } + break; + case GL_UNSIGNED_SHORT_4_4_4_4: + if (dstFormat == GL_RGBA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) << 12) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][BCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][ACOMP] * 15.0F) ); + } + } + else if (dstFormat == GL_BGRA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) << 12) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][RCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][ACOMP] * 15.0F) ); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) << 12) + | (IROUND(rgba[i][BCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][RCOMP] * 15.0F) ); + } + } + break; + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + if (dstFormat == GL_RGBA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) ) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][BCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][ACOMP] * 15.0F) << 12); + } + } + else if (dstFormat == GL_BGRA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) ) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][RCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][ACOMP] * 15.0F) << 12); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) ) + | (IROUND(rgba[i][BCOMP] * 15.0F) << 4) + | (IROUND(rgba[i][GCOMP] * 15.0F) << 8) + | (IROUND(rgba[i][RCOMP] * 15.0F) << 12); + } + } + break; + case GL_UNSIGNED_SHORT_5_5_5_1: + if (dstFormat == GL_RGBA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 6) + | (IROUND(rgba[i][BCOMP] * 31.0F) << 1) + | (IROUND(rgba[i][ACOMP] * 1.0F) ); + } + } + else if (dstFormat == GL_BGRA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) << 11) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 6) + | (IROUND(rgba[i][RCOMP] * 31.0F) << 1) + | (IROUND(rgba[i][ACOMP] * 1.0F) ); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) << 11) + | (IROUND(rgba[i][BCOMP] * 31.0F) << 6) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 1) + | (IROUND(rgba[i][RCOMP] * 1.0F) ); + } + } + break; + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + if (dstFormat == GL_RGBA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) ) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 5) + | (IROUND(rgba[i][BCOMP] * 31.0F) << 10) + | (IROUND(rgba[i][ACOMP] * 1.0F) << 15); + } + } + else if (dstFormat == GL_BGRA) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) ) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 5) + | (IROUND(rgba[i][RCOMP] * 31.0F) << 10) + | (IROUND(rgba[i][ACOMP] * 1.0F) << 15); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLushort *dst = (GLushort *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) ) + | (IROUND(rgba[i][BCOMP] * 31.0F) << 5) + | (IROUND(rgba[i][GCOMP] * 31.0F) << 10) + | (IROUND(rgba[i][RCOMP] * 1.0F) << 15); + } + } + break; + case GL_UNSIGNED_INT_8_8_8_8: + if (dstFormat == GL_RGBA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 255.F) << 24) + | (IROUND(rgba[i][GCOMP] * 255.F) << 16) + | (IROUND(rgba[i][BCOMP] * 255.F) << 8) + | (IROUND(rgba[i][ACOMP] * 255.F) ); + } + } + else if (dstFormat == GL_BGRA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 255.F) << 24) + | (IROUND(rgba[i][GCOMP] * 255.F) << 16) + | (IROUND(rgba[i][RCOMP] * 255.F) << 8) + | (IROUND(rgba[i][ACOMP] * 255.F) ); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 255.F) << 24) + | (IROUND(rgba[i][BCOMP] * 255.F) << 16) + | (IROUND(rgba[i][GCOMP] * 255.F) << 8) + | (IROUND(rgba[i][RCOMP] * 255.F) ); + } + } + break; + case GL_UNSIGNED_INT_8_8_8_8_REV: + if (dstFormat == GL_RGBA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 255.0F) ) + | (IROUND(rgba[i][GCOMP] * 255.0F) << 8) + | (IROUND(rgba[i][BCOMP] * 255.0F) << 16) + | (IROUND(rgba[i][ACOMP] * 255.0F) << 24); + } + } + else if (dstFormat == GL_BGRA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 255.0F) ) + | (IROUND(rgba[i][GCOMP] * 255.0F) << 8) + | (IROUND(rgba[i][RCOMP] * 255.0F) << 16) + | (IROUND(rgba[i][ACOMP] * 255.0F) << 24); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 255.0F) ) + | (IROUND(rgba[i][BCOMP] * 255.0F) << 8) + | (IROUND(rgba[i][GCOMP] * 255.0F) << 16) + | (IROUND(rgba[i][RCOMP] * 255.0F) << 24); + } + } + break; + case GL_UNSIGNED_INT_10_10_10_2: + if (dstFormat == GL_RGBA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) << 22) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12) + | (IROUND(rgba[i][BCOMP] * 1023.0F) << 2) + | (IROUND(rgba[i][ACOMP] * 3.0F) ); + } + } + else if (dstFormat == GL_BGRA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) << 22) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12) + | (IROUND(rgba[i][RCOMP] * 1023.0F) << 2) + | (IROUND(rgba[i][ACOMP] * 3.0F) ); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) << 22) + | (IROUND(rgba[i][BCOMP] * 1023.0F) << 12) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 2) + | (IROUND(rgba[i][RCOMP] * 3.0F) ); + } + } + break; + case GL_UNSIGNED_INT_2_10_10_10_REV: + if (dstFormat == GL_RGBA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) ) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10) + | (IROUND(rgba[i][BCOMP] * 1023.0F) << 20) + | (IROUND(rgba[i][ACOMP] * 3.0F) << 30); + } + } + else if (dstFormat == GL_BGRA) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) ) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10) + | (IROUND(rgba[i][RCOMP] * 1023.0F) << 20) + | (IROUND(rgba[i][ACOMP] * 3.0F) << 30); + } + } + else if (dstFormat == GL_ABGR_EXT) { + GLuint *dst = (GLuint *) dstAddr; + for (i=0;i<n;i++) { + dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) ) + | (IROUND(rgba[i][BCOMP] * 1023.0F) << 10) + | (IROUND(rgba[i][GCOMP] * 1023.0F) << 20) + | (IROUND(rgba[i][RCOMP] * 3.0F) << 30); + } + } + break; + default: + _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float"); + return; + } + + if (dstPacking->SwapBytes) { + GLint swapSize = _mesa_sizeof_packed_type(dstType); + if (swapSize == 2) { + if (dstPacking->SwapBytes) { + _mesa_swap2((GLushort *) dstAddr, n * comps); + } + } + else if (swapSize == 4) { + if (dstPacking->SwapBytes) { + _mesa_swap4((GLuint *) dstAddr, n * comps); + } + } + } +} + + +#define SWAP2BYTE(VALUE) \ + { \ + GLubyte *bytes = (GLubyte *) &(VALUE); \ + GLubyte tmp = bytes[0]; \ + bytes[0] = bytes[1]; \ + bytes[1] = tmp; \ + } + +#define SWAP4BYTE(VALUE) \ + { \ + GLubyte *bytes = (GLubyte *) &(VALUE); \ + GLubyte tmp = bytes[0]; \ + bytes[0] = bytes[3]; \ + bytes[3] = tmp; \ + tmp = bytes[1]; \ + bytes[1] = bytes[2]; \ + bytes[2] = tmp; \ + } + + +static void +extract_uint_indexes(GLuint n, GLuint indexes[], + GLenum srcFormat, GLenum srcType, const GLvoid *src, + const struct gl_pixelstore_attrib *unpack ) +{ + ASSERT(srcFormat == GL_COLOR_INDEX || srcFormat == GL_STENCIL_INDEX); + + ASSERT(srcType == GL_BITMAP || + srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_UNSIGNED_INT_24_8_EXT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT); + + switch (srcType) { + case GL_BITMAP: + { + GLubyte *ubsrc = (GLubyte *) src; + if (unpack->LsbFirst) { + GLubyte mask = 1 << (unpack->SkipPixels & 0x7); + GLuint i; + for (i = 0; i < n; i++) { + indexes[i] = (*ubsrc & mask) ? 1 : 0; + if (mask == 128) { + mask = 1; + ubsrc++; + } + else { + mask = mask << 1; + } + } + } + else { + GLubyte mask = 128 >> (unpack->SkipPixels & 0x7); + GLuint i; + for (i = 0; i < n; i++) { + indexes[i] = (*ubsrc & mask) ? 1 : 0; + if (mask == 1) { + mask = 128; + ubsrc++; + } + else { + mask = mask >> 1; + } + } + } + } + break; + case GL_UNSIGNED_BYTE: + { + GLuint i; + const GLubyte *s = (const GLubyte *) src; + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + break; + case GL_BYTE: + { + GLuint i; + const GLbyte *s = (const GLbyte *) src; + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + break; + case GL_UNSIGNED_SHORT: + { + GLuint i; + const GLushort *s = (const GLushort *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLushort value = s[i]; + SWAP2BYTE(value); + indexes[i] = value; + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + } + break; + case GL_SHORT: + { + GLuint i; + const GLshort *s = (const GLshort *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLshort value = s[i]; + SWAP2BYTE(value); + indexes[i] = value; + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + } + break; + case GL_UNSIGNED_INT: + { + GLuint i; + const GLuint *s = (const GLuint *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLuint value = s[i]; + SWAP4BYTE(value); + indexes[i] = value; + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + } + break; + case GL_INT: + { + GLuint i; + const GLint *s = (const GLint *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLint value = s[i]; + SWAP4BYTE(value); + indexes[i] = value; + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = s[i]; + } + } + break; + case GL_FLOAT: + { + GLuint i; + const GLfloat *s = (const GLfloat *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLfloat value = s[i]; + SWAP4BYTE(value); + indexes[i] = (GLuint) value; + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = (GLuint) s[i]; + } + } + break; + case GL_HALF_FLOAT_ARB: + { + GLuint i; + const GLhalfARB *s = (const GLhalfARB *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLhalfARB value = s[i]; + SWAP2BYTE(value); + indexes[i] = (GLuint) _mesa_half_to_float(value); + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = (GLuint) _mesa_half_to_float(s[i]); + } + } + break; + case GL_UNSIGNED_INT_24_8_EXT: + { + GLuint i; + const GLuint *s = (const GLuint *) src; + if (unpack->SwapBytes) { + for (i = 0; i < n; i++) { + GLuint value = s[i]; + SWAP4BYTE(value); + indexes[i] = value & 0xff; /* lower 8 bits */ + } + } + else { + for (i = 0; i < n; i++) + indexes[i] = s[i] & 0xff; /* lower 8 bits */ + } + } + break; + + default: + _mesa_problem(NULL, "bad srcType in extract_uint_indexes"); + return; + } +} + + +/* + * This function extracts floating point RGBA values from arbitrary + * image data. srcFormat and srcType are the format and type parameters + * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc. + * + * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function + * implements the "Conversion to floating point", "Conversion to RGB", + * and "Final Expansion to RGBA" operations. + * + * Args: n - number of pixels + * rgba - output colors + * srcFormat - format of incoming data + * srcType - data type of incoming data + * src - source data pointer + * swapBytes - perform byteswapping of incoming data? + */ +static void +extract_float_rgba(GLuint n, GLfloat rgba[][4], + GLenum srcFormat, GLenum srcType, const GLvoid *src, + GLboolean swapBytes) +{ + GLint redIndex, greenIndex, blueIndex, alphaIndex; + GLint stride; + GLint rComp, bComp, gComp, aComp; + + 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_DUDV_ATI); + + ASSERT(srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT || + 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; + case GL_DUDV_ATI: + redIndex = 0; + greenIndex = 1; + blueIndex = -1; + alphaIndex = -1; + stride = 2; + 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, + GLbitfield transferOps ) +{ + ASSERT(dstFormat == GL_ALPHA || + dstFormat == GL_LUMINANCE || + dstFormat == GL_LUMINANCE_ALPHA || + dstFormat == GL_INTENSITY || + dstFormat == GL_RGB || + dstFormat == GL_RGBA || + dstFormat == GL_COLOR_INDEX); + + ASSERT(srcFormat == GL_RED || + srcFormat == GL_GREEN || + srcFormat == GL_BLUE || + srcFormat == GL_ALPHA || + srcFormat == GL_LUMINANCE || + srcFormat == GL_LUMINANCE_ALPHA || + srcFormat == GL_INTENSITY || + srcFormat == GL_RGB || + srcFormat == GL_BGR || + srcFormat == GL_RGBA || + srcFormat == GL_BGRA || + srcFormat == GL_ABGR_EXT || + srcFormat == GL_COLOR_INDEX); + + ASSERT(srcType == GL_BITMAP || + srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT || + srcType == GL_UNSIGNED_BYTE_3_3_2 || + srcType == GL_UNSIGNED_BYTE_2_3_3_REV || + srcType == GL_UNSIGNED_SHORT_5_6_5 || + srcType == GL_UNSIGNED_SHORT_5_6_5_REV || + srcType == GL_UNSIGNED_SHORT_4_4_4_4 || + srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV || + srcType == GL_UNSIGNED_SHORT_5_5_5_1 || + srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV || + srcType == GL_UNSIGNED_INT_8_8_8_8 || + srcType == GL_UNSIGNED_INT_8_8_8_8_REV || + srcType == GL_UNSIGNED_INT_10_10_10_2 || + srcType == GL_UNSIGNED_INT_2_10_10_10_REV); + + /* Try simple cases first */ + if (transferOps == 0) { + if (srcType == CHAN_TYPE) { + if (dstFormat == GL_RGBA) { + if (srcFormat == GL_RGBA) { + _mesa_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) { + _mesa_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); + _mesa_memcpy( dest, source, n * comps * sizeof(GLchan) ); + return; + } + } + /* + * Common situation, loading 8bit RGBA/RGB source images + * into 16/32 bit destination. (OSMesa16/32) + */ + else if (srcType == GL_UNSIGNED_BYTE) { + if (dstFormat == GL_RGBA) { + if (srcFormat == GL_RGB) { + GLuint i; + const GLubyte *src = (const GLubyte *) source; + GLchan *dst = dest; + for (i = 0; i < n; i++) { + dst[0] = UBYTE_TO_CHAN(src[0]); + dst[1] = UBYTE_TO_CHAN(src[1]); + dst[2] = UBYTE_TO_CHAN(src[2]); + dst[3] = CHAN_MAX; + src += 3; + dst += 4; + } + return; + } + else if (srcFormat == GL_RGBA) { + GLuint i; + const GLubyte *src = (const GLubyte *) source; + GLchan *dst = dest; + for (i = 0; i < n; i++) { + dst[0] = UBYTE_TO_CHAN(src[0]); + dst[1] = UBYTE_TO_CHAN(src[1]); + dst[2] = UBYTE_TO_CHAN(src[2]); + dst[3] = UBYTE_TO_CHAN(src[3]); + src += 4; + dst += 4; + } + return; + } + } + else if (dstFormat == GL_RGB) { + if (srcFormat == GL_RGB) { + GLuint i; + const GLubyte *src = (const GLubyte *) source; + GLchan *dst = dest; + for (i = 0; i < n; i++) { + dst[0] = UBYTE_TO_CHAN(src[0]); + dst[1] = UBYTE_TO_CHAN(src[1]); + dst[2] = UBYTE_TO_CHAN(src[2]); + src += 3; + dst += 3; + } + return; + } + else if (srcFormat == GL_RGBA) { + GLuint i; + const GLubyte *src = (const GLubyte *) source; + GLchan *dst = dest; + for (i = 0; i < n; i++) { + dst[0] = UBYTE_TO_CHAN(src[0]); + dst[1] = UBYTE_TO_CHAN(src[1]); + dst[2] = UBYTE_TO_CHAN(src[2]); + src += 4; + dst += 3; + } + return; + } + } + } + } + + + /* general solution begins here */ + { + GLint dstComponents; + GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex; + GLint dstLuminanceIndex, dstIntensityIndex; + GLfloat rgba[MAX_WIDTH][4]; + + dstComponents = _mesa_components_in_format( dstFormat ); + /* source & dest image formats should have been error checked by now */ + assert(dstComponents > 0); + + /* + * Extract image data and convert to RGBA floats + */ + assert(n <= MAX_WIDTH); + if (srcFormat == GL_COLOR_INDEX) { + GLuint indexes[MAX_WIDTH]; + extract_uint_indexes(n, indexes, srcFormat, srcType, source, + srcPacking); + + if (dstFormat == GL_COLOR_INDEX) { + GLuint i; + _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes); + /* convert to GLchan and return */ + for (i = 0; i < n; i++) { + dest[i] = (GLchan) (indexes[i] & 0xff); + } + return; + } + else { + /* Convert indexes to RGBA */ + if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { + shift_and_offset_ci(ctx, n, indexes); + } + _mesa_map_ci_to_rgba(ctx, n, indexes, rgba); + } + + /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting + * with color indexes. + */ + transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT); + } + else { + /* non-color index data */ + extract_float_rgba(n, rgba, srcFormat, srcType, source, + srcPacking->SwapBytes); + } + + /* Need to clamp if returning GLubytes or GLushorts */ +#if CHAN_TYPE != GL_FLOAT + transferOps |= IMAGE_CLAMP_BIT; +#endif + + if (transferOps) { + _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba); + } + + /* Now determine which color channels we need to produce. + * And determine the dest index (offset) within each color tuple. + */ + switch (dstFormat) { + case GL_ALPHA: + dstAlphaIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = -1; + dstLuminanceIndex = dstIntensityIndex = -1; + break; + case GL_LUMINANCE: + dstLuminanceIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1; + dstIntensityIndex = -1; + break; + case GL_LUMINANCE_ALPHA: + dstLuminanceIndex = 0; + dstAlphaIndex = 1; + dstRedIndex = dstGreenIndex = dstBlueIndex = -1; + dstIntensityIndex = -1; + break; + case GL_INTENSITY: + dstIntensityIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1; + dstLuminanceIndex = -1; + break; + case GL_RGB: + dstRedIndex = 0; + dstGreenIndex = 1; + dstBlueIndex = 2; + dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1; + break; + case GL_RGBA: + dstRedIndex = 0; + dstGreenIndex = 1; + dstBlueIndex = 2; + dstAlphaIndex = 3; + dstLuminanceIndex = dstIntensityIndex = -1; + break; + default: + _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()"); + return; + } + + + /* Now return the GLchan data in the requested dstFormat */ + + if (dstRedIndex >= 0) { + GLchan *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + CLAMPED_FLOAT_TO_CHAN(dst[dstRedIndex], rgba[i][RCOMP]); + dst += dstComponents; + } + } + + if (dstGreenIndex >= 0) { + GLchan *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + CLAMPED_FLOAT_TO_CHAN(dst[dstGreenIndex], rgba[i][GCOMP]); + dst += dstComponents; + } + } + + if (dstBlueIndex >= 0) { + GLchan *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + CLAMPED_FLOAT_TO_CHAN(dst[dstBlueIndex], rgba[i][BCOMP]); + dst += dstComponents; + } + } + + if (dstAlphaIndex >= 0) { + GLchan *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + CLAMPED_FLOAT_TO_CHAN(dst[dstAlphaIndex], rgba[i][ACOMP]); + dst += dstComponents; + } + } + + if (dstIntensityIndex >= 0) { + GLchan *dst = dest; + GLuint i; + assert(dstIntensityIndex == 0); + assert(dstComponents == 1); + for (i = 0; i < n; i++) { + /* Intensity comes from red channel */ + CLAMPED_FLOAT_TO_CHAN(dst[i], rgba[i][RCOMP]); + } + } + + if (dstLuminanceIndex >= 0) { + GLchan *dst = dest; + GLuint i; + assert(dstLuminanceIndex == 0); + for (i = 0; i < n; i++) { + /* Luminance comes from red channel */ + CLAMPED_FLOAT_TO_CHAN(dst[0], rgba[i][RCOMP]); + dst += dstComponents; + } + } + } +} + + +/** + * Same as _mesa_unpack_color_span_chan(), but return GLfloat data + * instead of GLchan. + */ +void +_mesa_unpack_color_span_float( GLcontext *ctx, + GLuint n, GLenum dstFormat, GLfloat dest[], + GLenum srcFormat, GLenum srcType, + const GLvoid *source, + const struct gl_pixelstore_attrib *srcPacking, + GLbitfield transferOps ) +{ + ASSERT(dstFormat == GL_ALPHA || + dstFormat == GL_LUMINANCE || + dstFormat == GL_LUMINANCE_ALPHA || + dstFormat == GL_INTENSITY || + dstFormat == GL_RGB || + dstFormat == GL_RGBA || + dstFormat == GL_COLOR_INDEX); + + ASSERT(srcFormat == GL_RED || + srcFormat == GL_GREEN || + srcFormat == GL_BLUE || + srcFormat == GL_ALPHA || + srcFormat == GL_LUMINANCE || + srcFormat == GL_LUMINANCE_ALPHA || + srcFormat == GL_INTENSITY || + srcFormat == GL_RGB || + srcFormat == GL_BGR || + srcFormat == GL_RGBA || + srcFormat == GL_BGRA || + srcFormat == GL_ABGR_EXT || + srcFormat == GL_COLOR_INDEX); + + ASSERT(srcType == GL_BITMAP || + srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT || + srcType == GL_UNSIGNED_BYTE_3_3_2 || + srcType == GL_UNSIGNED_BYTE_2_3_3_REV || + srcType == GL_UNSIGNED_SHORT_5_6_5 || + srcType == GL_UNSIGNED_SHORT_5_6_5_REV || + srcType == GL_UNSIGNED_SHORT_4_4_4_4 || + srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV || + srcType == GL_UNSIGNED_SHORT_5_5_5_1 || + srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV || + srcType == GL_UNSIGNED_INT_8_8_8_8 || + srcType == GL_UNSIGNED_INT_8_8_8_8_REV || + srcType == GL_UNSIGNED_INT_10_10_10_2 || + srcType == GL_UNSIGNED_INT_2_10_10_10_REV); + + /* general solution, no special cases, yet */ + { + GLint dstComponents; + GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex; + GLint dstLuminanceIndex, dstIntensityIndex; + GLfloat rgba[MAX_WIDTH][4]; + + dstComponents = _mesa_components_in_format( dstFormat ); + /* source & dest image formats should have been error checked by now */ + assert(dstComponents > 0); + + /* + * Extract image data and convert to RGBA floats + */ + assert(n <= MAX_WIDTH); + if (srcFormat == GL_COLOR_INDEX) { + GLuint indexes[MAX_WIDTH]; + extract_uint_indexes(n, indexes, srcFormat, srcType, source, + srcPacking); + + if (dstFormat == GL_COLOR_INDEX) { + GLuint i; + _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes); + /* convert to GLchan and return */ + for (i = 0; i < n; i++) { + dest[i] = (GLchan) (indexes[i] & 0xff); + } + return; + } + else { + /* Convert indexes to RGBA */ + if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { + shift_and_offset_ci(ctx, n, indexes); + } + _mesa_map_ci_to_rgba(ctx, n, indexes, rgba); + } + + /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting + * with color indexes. + */ + transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT); + } + else { + /* non-color index data */ + extract_float_rgba(n, rgba, srcFormat, srcType, source, + srcPacking->SwapBytes); + } + + if (transferOps) { + _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba); + } + + /* Now determine which color channels we need to produce. + * And determine the dest index (offset) within each color tuple. + */ + switch (dstFormat) { + case GL_ALPHA: + dstAlphaIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = -1; + dstLuminanceIndex = dstIntensityIndex = -1; + break; + case GL_LUMINANCE: + dstLuminanceIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1; + dstIntensityIndex = -1; + break; + case GL_LUMINANCE_ALPHA: + dstLuminanceIndex = 0; + dstAlphaIndex = 1; + dstRedIndex = dstGreenIndex = dstBlueIndex = -1; + dstIntensityIndex = -1; + break; + case GL_INTENSITY: + dstIntensityIndex = 0; + dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1; + dstLuminanceIndex = -1; + break; + case GL_RGB: + dstRedIndex = 0; + dstGreenIndex = 1; + dstBlueIndex = 2; + dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1; + break; + case GL_RGBA: + dstRedIndex = 0; + dstGreenIndex = 1; + dstBlueIndex = 2; + dstAlphaIndex = 3; + dstLuminanceIndex = dstIntensityIndex = -1; + break; + default: + _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()"); + return; + } + + /* Now pack results in the requested dstFormat */ + if (dstRedIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[dstRedIndex] = rgba[i][RCOMP]; + dst += dstComponents; + } + } + + if (dstGreenIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[dstGreenIndex] = rgba[i][GCOMP]; + dst += dstComponents; + } + } + + if (dstBlueIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[dstBlueIndex] = rgba[i][BCOMP]; + dst += dstComponents; + } + } + + if (dstAlphaIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[dstAlphaIndex] = rgba[i][ACOMP]; + dst += dstComponents; + } + } + + if (dstIntensityIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + assert(dstIntensityIndex == 0); + assert(dstComponents == 1); + for (i = 0; i < n; i++) { + /* Intensity comes from red channel */ + dst[i] = rgba[i][RCOMP]; + } + } + + if (dstLuminanceIndex >= 0) { + GLfloat *dst = dest; + GLuint i; + assert(dstLuminanceIndex == 0); + for (i = 0; i < n; i++) { + /* Luminance comes from red channel */ + dst[0] = rgba[i][RCOMP]; + dst += dstComponents; + } + } + } +} + +/** + * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba, + * directly return GLbyte data, no transfer ops apply. + */ +void +_mesa_unpack_dudv_span_byte( GLcontext *ctx, + GLuint n, GLenum dstFormat, GLbyte dest[], + GLenum srcFormat, GLenum srcType, + const GLvoid *source, + const struct gl_pixelstore_attrib *srcPacking, + GLbitfield transferOps ) +{ + ASSERT(dstFormat == GL_DUDV_ATI); + ASSERT(srcFormat == GL_DUDV_ATI); + + ASSERT(srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT); + + /* general solution */ + { + GLint dstComponents; + GLfloat rgba[MAX_WIDTH][4]; + GLbyte *dst = dest; + GLuint i; + + dstComponents = _mesa_components_in_format( dstFormat ); + /* source & dest image formats should have been error checked by now */ + assert(dstComponents > 0); + + /* + * Extract image data and convert to RGBA floats + */ + assert(n <= MAX_WIDTH); + extract_float_rgba(n, rgba, srcFormat, srcType, source, + srcPacking->SwapBytes); + + + /* Now determine which color channels we need to produce. + * And determine the dest index (offset) within each color tuple. + */ + + /* Now pack results in the requested dstFormat */ + for (i = 0; i < n; i++) { + /* not sure - need clamp[-1,1] here? */ + dst[0] = FLOAT_TO_BYTE(rgba[i][RCOMP]); + dst[1] = FLOAT_TO_BYTE(rgba[i][GCOMP]); + dst += dstComponents; + } + } +} + +/* + * Unpack a row of color index data from a client buffer according to + * the pixel unpacking parameters. + * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc. + * + * Args: ctx - the context + * n - number of pixels + * dstType - destination data type + * dest - destination array + * srcType - source pixel type + * source - source data pointer + * srcPacking - pixel unpacking parameters + * transferOps - the pixel transfer operations to apply + */ +void +_mesa_unpack_index_span( const GLcontext *ctx, GLuint n, + GLenum dstType, GLvoid *dest, + GLenum srcType, const GLvoid *source, + const struct gl_pixelstore_attrib *srcPacking, + GLbitfield transferOps ) +{ + ASSERT(srcType == GL_BITMAP || + srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT); + + ASSERT(dstType == GL_UNSIGNED_BYTE || + dstType == GL_UNSIGNED_SHORT || + dstType == GL_UNSIGNED_INT); + + + transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT); + + /* + * Try simple cases first + */ + if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE + && dstType == GL_UNSIGNED_BYTE) { + _mesa_memcpy(dest, source, n * sizeof(GLubyte)); + } + else if (transferOps == 0 && srcType == GL_UNSIGNED_INT + && dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) { + _mesa_memcpy(dest, source, n * sizeof(GLuint)); + } + else { + /* + * general solution + */ + GLuint indexes[MAX_WIDTH]; + assert(n <= MAX_WIDTH); + + extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source, + srcPacking); + + if (transferOps) + _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes); + + /* convert to dest type */ + switch (dstType) { + case GL_UNSIGNED_BYTE: + { + GLubyte *dst = (GLubyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLubyte) (indexes[i] & 0xff); + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLushort) (indexes[i] & 0xffff); + } + } + break; + case GL_UNSIGNED_INT: + _mesa_memcpy(dest, indexes, n * sizeof(GLuint)); + break; + default: + _mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span"); + } + } +} + + +void +_mesa_pack_index_span( const GLcontext *ctx, GLuint n, + GLenum dstType, GLvoid *dest, const GLuint *source, + const struct gl_pixelstore_attrib *dstPacking, + GLbitfield transferOps ) +{ + GLuint indexes[MAX_WIDTH]; + + ASSERT(n <= MAX_WIDTH); + + transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT); + + if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) { + /* make a copy of input */ + _mesa_memcpy(indexes, source, n * sizeof(GLuint)); + _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes); + source = indexes; + } + + switch (dstType) { + case GL_UNSIGNED_BYTE: + { + GLubyte *dst = (GLubyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + *dst++ = (GLubyte) source[i]; + } + } + break; + case GL_BYTE: + { + GLbyte *dst = (GLbyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLbyte) source[i]; + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLushort *dst = (GLushort *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLushort) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_SHORT: + { + GLshort *dst = (GLshort *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLshort) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_UNSIGNED_INT: + { + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLuint) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_INT: + { + GLint *dst = (GLint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLint) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_FLOAT: + { + GLfloat *dst = (GLfloat *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLfloat) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_HALF_FLOAT_ARB: + { + GLhalfARB *dst = (GLhalfARB *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = _mesa_float_to_half((GLfloat) source[i]); + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + default: + _mesa_problem(ctx, "bad type in _mesa_pack_index_span"); + } +} + + +/* + * Unpack a row of stencil data from a client buffer according to + * the pixel unpacking parameters. + * This is (or will be) used by glDrawPixels + * + * Args: ctx - the context + * n - number of pixels + * dstType - destination data type + * dest - destination array + * srcType - source pixel type + * source - source data pointer + * srcPacking - pixel unpacking parameters + * transferOps - apply offset/bias/lookup ops? + */ +void +_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n, + GLenum dstType, GLvoid *dest, + GLenum srcType, const GLvoid *source, + const struct gl_pixelstore_attrib *srcPacking, + GLbitfield transferOps ) +{ + ASSERT(srcType == GL_BITMAP || + srcType == GL_UNSIGNED_BYTE || + srcType == GL_BYTE || + srcType == GL_UNSIGNED_SHORT || + srcType == GL_SHORT || + srcType == GL_UNSIGNED_INT || + srcType == GL_INT || + srcType == GL_UNSIGNED_INT_24_8_EXT || + srcType == GL_HALF_FLOAT_ARB || + srcType == GL_FLOAT); + + ASSERT(dstType == GL_UNSIGNED_BYTE || + dstType == GL_UNSIGNED_SHORT || + dstType == GL_UNSIGNED_INT); + + /* only shift and offset apply to stencil */ + transferOps &= IMAGE_SHIFT_OFFSET_BIT; + + /* + * Try simple cases first + */ + if (transferOps == 0 && + !ctx->Pixel.MapStencilFlag && + srcType == GL_UNSIGNED_BYTE && + dstType == GL_UNSIGNED_BYTE) { + _mesa_memcpy(dest, source, n * sizeof(GLubyte)); + } + else if (transferOps == 0 && + !ctx->Pixel.MapStencilFlag && + srcType == GL_UNSIGNED_INT && + dstType == GL_UNSIGNED_INT && + !srcPacking->SwapBytes) { + _mesa_memcpy(dest, source, n * sizeof(GLuint)); + } + else { + /* + * general solution + */ + GLuint indexes[MAX_WIDTH]; + assert(n <= MAX_WIDTH); + + extract_uint_indexes(n, indexes, GL_STENCIL_INDEX, srcType, source, + srcPacking); + + if (transferOps & IMAGE_SHIFT_OFFSET_BIT) { + /* shift and offset indexes */ + shift_and_offset_ci(ctx, n, indexes); + } + + if (ctx->Pixel.MapStencilFlag) { + /* Apply stencil lookup table */ + const GLuint mask = ctx->PixelMaps.StoS.Size - 1; + GLuint i; + for (i = 0; i < n; i++) { + indexes[i] = (GLuint)ctx->PixelMaps.StoS.Map[ indexes[i] & mask ]; + } + } + + /* convert to dest type */ + switch (dstType) { + case GL_UNSIGNED_BYTE: + { + GLubyte *dst = (GLubyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLubyte) (indexes[i] & 0xff); + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = (GLushort) (indexes[i] & 0xffff); + } + } + break; + case GL_UNSIGNED_INT: + _mesa_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 */ + _mesa_memcpy(stencil, source, n * sizeof(GLstencil)); + _mesa_apply_stencil_transfer_ops(ctx, n, stencil); + source = stencil; + } + + switch (dstType) { + case GL_UNSIGNED_BYTE: + if (sizeof(GLstencil) == 1) { + _mesa_memcpy( dest, source, n ); + } + else { + GLubyte *dst = (GLubyte *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLubyte) source[i]; + } + } + break; + case GL_BYTE: + { + GLbyte *dst = (GLbyte *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLbyte) (source[i] & 0x7f); + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLushort *dst = (GLushort *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLushort) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_SHORT: + { + GLshort *dst = (GLshort *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLshort) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_UNSIGNED_INT: + { + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLuint) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_INT: + { + GLint *dst = (GLint *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLint) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_FLOAT: + { + GLfloat *dst = (GLfloat *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = (GLfloat) source[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_HALF_FLOAT_ARB: + { + GLhalfARB *dst = (GLhalfARB *) dest; + GLuint i; + for (i=0;i<n;i++) { + dst[i] = _mesa_float_to_half( (float) source[i] ); + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_BITMAP: + if (dstPacking->LsbFirst) { + GLubyte *dst = (GLubyte *) dest; + GLint shift = 0; + GLuint i; + for (i = 0; i < n; i++) { + if (shift == 0) + *dst = 0; + *dst |= ((source[i] != 0) << shift); + shift++; + if (shift == 8) { + shift = 0; + dst++; + } + } + } + else { + GLubyte *dst = (GLubyte *) dest; + GLint shift = 7; + GLuint i; + for (i = 0; i < n; i++) { + if (shift == 7) + *dst = 0; + *dst |= ((source[i] != 0) << shift); + shift--; + if (shift < 0) { + shift = 7; + dst++; + } + } + } + break; + default: + _mesa_problem(ctx, "bad type in _mesa_pack_index_span"); + } +} + +#define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \ + do { \ + GLuint i; \ + const GLTYPE *src = (const GLTYPE *)source; \ + for (i = 0; i < n; i++) { \ + GLTYPE value = src[i]; \ + if (srcPacking->SwapBytes) { \ + if (sizeof(GLTYPE) == 2) { \ + SWAP2BYTE(value); \ + } else if (sizeof(GLTYPE) == 4) { \ + SWAP4BYTE(value); \ + } \ + } \ + depthValues[i] = GLTYPE2FLOAT(value); \ + } \ + } while (0) + + +/** + * Unpack a row of depth/z values from memory, returning GLushort, GLuint + * or GLfloat values. + * The glPixelTransfer (scale/bias) params will be applied. + * + * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT + * \param depthMax max value for returned GLushort or GLuint values + * (ignored for GLfloat). + */ +void +_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n, + GLenum dstType, GLvoid *dest, GLuint depthMax, + GLenum srcType, const GLvoid *source, + const struct gl_pixelstore_attrib *srcPacking ) +{ + GLfloat depthTemp[MAX_WIDTH], *depthValues; + GLboolean needClamp = GL_FALSE; + + /* Look for special cases first. + * Not only are these faster, they're less prone to numeric conversion + * problems. Otherwise, converting from an int type to a float then + * back to an int type can introduce errors that will show up as + * artifacts in things like depth peeling which uses glCopyTexImage. + */ + if (ctx->Pixel.DepthScale == 1.0 && ctx->Pixel.DepthBias == 0.0) { + if (srcType == GL_UNSIGNED_INT && dstType == GL_UNSIGNED_SHORT) { + const GLuint *src = (const GLuint *) source; + GLushort *dst = (GLushort *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = src[i] >> 16; + } + return; + } + if (srcType == GL_UNSIGNED_SHORT + && dstType == GL_UNSIGNED_INT + && depthMax == 0xffffffff) { + const GLushort *src = (const GLushort *) source; + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = src[i] | (src[i] << 16); + } + return; + } + if (srcType == GL_UNSIGNED_INT_24_8 + && dstType == GL_UNSIGNED_INT + && depthMax == 0xffffff) { + const GLuint *src = (const GLuint *) source; + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = src[i] >> 8; + } + return; + } + /* XXX may want to add additional cases here someday */ + } + + /* general case path follows */ + + if (dstType == GL_FLOAT) { + depthValues = (GLfloat *) dest; + } + else { + depthValues = depthTemp; + } + + /* Convert incoming values to GLfloat. Some conversions will require + * clamping, below. + */ + switch (srcType) { + case GL_BYTE: + DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT); + needClamp = GL_TRUE; + break; + case GL_UNSIGNED_BYTE: + DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT); + break; + case GL_SHORT: + DEPTH_VALUES(GLshort, SHORT_TO_FLOAT); + needClamp = GL_TRUE; + break; + case GL_UNSIGNED_SHORT: + DEPTH_VALUES(GLushort, USHORT_TO_FLOAT); + break; + case GL_INT: + DEPTH_VALUES(GLint, INT_TO_FLOAT); + needClamp = GL_TRUE; + break; + case GL_UNSIGNED_INT: + DEPTH_VALUES(GLuint, UINT_TO_FLOAT); + break; + case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */ + if (dstType == GL_UNSIGNED_INT_24_8_EXT && + depthMax == 0xffffff && + ctx->Pixel.DepthScale == 1.0 && + ctx->Pixel.DepthBias == 0.0) { + const GLuint *src = (const GLuint *) source; + GLuint *zValues = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + GLuint value = src[i]; + if (srcPacking->SwapBytes) { + SWAP4BYTE(value); + } + zValues[i] = value & 0xffffff00; + } + return; + } + else { + const GLuint *src = (const GLuint *) source; + const GLfloat scale = 1.0f / 0xffffff; + GLuint i; + for (i = 0; i < n; i++) { + GLuint value = src[i]; + if (srcPacking->SwapBytes) { + SWAP4BYTE(value); + } + depthValues[i] = (value >> 8) * scale; + } + } + break; + case GL_FLOAT: + DEPTH_VALUES(GLfloat, 1*); + needClamp = GL_TRUE; + break; + case GL_HALF_FLOAT_ARB: + { + GLuint i; + const GLhalfARB *src = (const GLhalfARB *) source; + for (i = 0; i < n; i++) { + GLhalfARB value = src[i]; + if (srcPacking->SwapBytes) { + SWAP2BYTE(value); + } + depthValues[i] = _mesa_half_to_float(value); + } + needClamp = GL_TRUE; + } + break; + default: + _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()"); + return; + } + + /* apply depth scale and bias */ + { + const GLfloat scale = ctx->Pixel.DepthScale; + const GLfloat bias = ctx->Pixel.DepthBias; + if (scale != 1.0 || bias != 0.0) { + GLuint i; + for (i = 0; i < n; i++) { + depthValues[i] = depthValues[i] * scale + bias; + } + needClamp = GL_TRUE; + } + } + + /* clamp to [0, 1] */ + if (needClamp) { + GLuint i; + for (i = 0; i < n; i++) { + depthValues[i] = (GLfloat)CLAMP(depthValues[i], 0.0, 1.0); + } + } + + /* + * Convert values to dstType + */ + if (dstType == GL_UNSIGNED_INT) { + GLuint *zValues = (GLuint *) dest; + GLuint i; + if (depthMax <= 0xffffff) { + /* no overflow worries */ + for (i = 0; i < n; i++) { + zValues[i] = (GLuint) (depthValues[i] * (GLfloat) depthMax); + } + } + else { + /* need to use double precision to prevent overflow problems */ + for (i = 0; i < n; i++) { + GLdouble z = depthValues[i] * (GLfloat) depthMax; + if (z >= (GLdouble) 0xffffffff) + zValues[i] = 0xffffffff; + else + zValues[i] = (GLuint) z; + } + } + } + else if (dstType == GL_UNSIGNED_SHORT) { + GLushort *zValues = (GLushort *) dest; + GLuint i; + ASSERT(depthMax <= 0xffff); + for (i = 0; i < n; i++) { + zValues[i] = (GLushort) (depthValues[i] * (GLfloat) depthMax); + } + } + else { + ASSERT(dstType == GL_FLOAT); + /*ASSERT(depthMax == 1.0F);*/ + } +} + + +/* + * Pack an array of depth values. The values are floats in [0,1]. + */ +void +_mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest, + GLenum dstType, const GLfloat *depthSpan, + const struct gl_pixelstore_attrib *dstPacking ) +{ + GLfloat depthCopy[MAX_WIDTH]; + + ASSERT(n <= MAX_WIDTH); + + if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) { + _mesa_memcpy(depthCopy, depthSpan, n * sizeof(GLfloat)); + _mesa_scale_and_bias_depth(ctx, n, depthCopy); + depthSpan = depthCopy; + } + + switch (dstType) { + case GL_UNSIGNED_BYTE: + { + GLubyte *dst = (GLubyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = FLOAT_TO_UBYTE( depthSpan[i] ); + } + } + break; + case GL_BYTE: + { + GLbyte *dst = (GLbyte *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = FLOAT_TO_BYTE( depthSpan[i] ); + } + } + break; + case GL_UNSIGNED_SHORT: + { + GLushort *dst = (GLushort *) dest; + GLuint i; + for (i = 0; i < n; i++) { + CLAMPED_FLOAT_TO_USHORT(dst[i], depthSpan[i]); + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_SHORT: + { + GLshort *dst = (GLshort *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = FLOAT_TO_SHORT( depthSpan[i] ); + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + case GL_UNSIGNED_INT: + { + GLuint *dst = (GLuint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = FLOAT_TO_UINT( depthSpan[i] ); + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_INT: + { + GLint *dst = (GLint *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = FLOAT_TO_INT( depthSpan[i] ); + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_FLOAT: + { + GLfloat *dst = (GLfloat *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = depthSpan[i]; + } + if (dstPacking->SwapBytes) { + _mesa_swap4( (GLuint *) dst, n ); + } + } + break; + case GL_HALF_FLOAT_ARB: + { + GLhalfARB *dst = (GLhalfARB *) dest; + GLuint i; + for (i = 0; i < n; i++) { + dst[i] = _mesa_float_to_half(depthSpan[i]); + } + if (dstPacking->SwapBytes) { + _mesa_swap2( (GLushort *) dst, n ); + } + } + break; + default: + _mesa_problem(ctx, "bad type in _mesa_pack_depth_span"); + } +} + + + +/** + * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8. + */ +void +_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest, + const GLfloat *depthVals, + const GLstencil *stencilVals, + const struct gl_pixelstore_attrib *dstPacking) +{ + GLfloat depthCopy[MAX_WIDTH]; + GLstencil stencilCopy[MAX_WIDTH]; + GLuint i; + + ASSERT(n <= MAX_WIDTH); + + if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) { + _mesa_memcpy(depthCopy, depthVals, n * sizeof(GLfloat)); + _mesa_scale_and_bias_depth(ctx, n, depthCopy); + depthVals = depthCopy; + } + + if (ctx->Pixel.IndexShift || + ctx->Pixel.IndexOffset || + ctx->Pixel.MapStencilFlag) { + _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil)); + _mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy); + stencilVals = stencilCopy; + } + + for (i = 0; i < n; i++) { + GLuint z = (GLuint) (depthVals[i] * 0xffffff); + dest[i] = (z << 8) | (stencilVals[i] & 0xff); + } + + if (dstPacking->SwapBytes) { + _mesa_swap4(dest, n); + } +} + + + + +/** + * Unpack image data. Apply byte swapping, byte flipping (bitmap). + * Return all image data in a contiguous block. This is used when we + * compile glDrawPixels, glTexImage, etc into a display list. We + * need a copy of the data in a standard format. + */ +void * +_mesa_unpack_image( GLuint dimensions, + GLsizei width, GLsizei height, GLsizei depth, + GLenum format, GLenum type, const GLvoid *pixels, + const struct gl_pixelstore_attrib *unpack ) +{ + GLint bytesPerRow, compsPerRow; + GLboolean flipBytes, swap2, swap4; + + if (!pixels) + return NULL; /* not necessarily an error */ + + if (width <= 0 || height <= 0 || depth <= 0) + return NULL; /* generate error later */ + + if (type == GL_BITMAP) { + bytesPerRow = (width + 7) >> 3; + flipBytes = unpack->LsbFirst; + swap2 = swap4 = GL_FALSE; + compsPerRow = 0; + } + else { + const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type); + GLint components = _mesa_components_in_format(format); + GLint bytesPerComp; + + if (_mesa_type_is_packed(type)) + components = 1; + + if (bytesPerPixel <= 0 || components <= 0) + return NULL; /* bad format or type. generate error later */ + bytesPerRow = bytesPerPixel * width; + bytesPerComp = bytesPerPixel / components; + flipBytes = GL_FALSE; + swap2 = (bytesPerComp == 2) && unpack->SwapBytes; + swap4 = (bytesPerComp == 4) && unpack->SwapBytes; + compsPerRow = components * width; + assert(compsPerRow >= width); + } + + { + GLubyte *destBuffer + = (GLubyte *) _mesa_malloc(bytesPerRow * height * depth); + GLubyte *dst; + GLint img, row; + if (!destBuffer) + return NULL; /* generate GL_OUT_OF_MEMORY later */ + + dst = destBuffer; + for (img = 0; img < depth; img++) { + for (row = 0; row < height; row++) { + const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels, + width, height, format, type, img, row, 0); + + if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) { + GLint i; + flipBytes = GL_FALSE; + if (unpack->LsbFirst) { + GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 128) { + srcMask = 1; + s++; + } + else { + srcMask = srcMask << 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + else { + GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 1) { + srcMask = 128; + s++; + } + else { + srcMask = srcMask >> 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + } + else { + _mesa_memcpy(dst, src, bytesPerRow); + } + + /* byte flipping/swapping */ + if (flipBytes) { + flip_bytes((GLubyte *) dst, bytesPerRow); + } + else if (swap2) { + _mesa_swap2((GLushort*) dst, compsPerRow); + } + else if (swap4) { + _mesa_swap4((GLuint*) dst, compsPerRow); + } + dst += bytesPerRow; + } + } + return destBuffer; + } +} + +#endif /* _HAVE_FULL_GL */ + + + +/** + * Convert an array of RGBA colors from one datatype to another. + * NOTE: src may equal dst. In that case, we use a temporary buffer. + */ +void +_mesa_convert_colors(GLenum srcType, const GLvoid *src, + GLenum dstType, GLvoid *dst, + GLuint count, const GLubyte mask[]) +{ + GLuint tempBuffer[MAX_WIDTH][4]; + const GLboolean useTemp = (src == dst); + + ASSERT(srcType != dstType); + + switch (srcType) { + case GL_UNSIGNED_BYTE: + if (dstType == GL_UNSIGNED_SHORT) { + const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src; + GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]); + dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]); + dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]); + dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort)); + } + else { + const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src; + GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + ASSERT(dstType == GL_FLOAT); + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]); + dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]); + dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]); + dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat)); + } + break; + case GL_UNSIGNED_SHORT: + if (dstType == GL_UNSIGNED_BYTE) { + const GLushort (*src2)[4] = (const GLushort (*)[4]) src; + GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]); + dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]); + dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]); + dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte)); + } + else { + const GLushort (*src2)[4] = (const GLushort (*)[4]) src; + GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + ASSERT(dstType == GL_FLOAT); + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]); + dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]); + dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]); + dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat)); + } + break; + case GL_FLOAT: + if (dstType == GL_UNSIGNED_BYTE) { + const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src; + GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]); + UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]); + UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]); + UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte)); + } + else { + const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src; + GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst); + GLuint i; + ASSERT(dstType == GL_UNSIGNED_SHORT); + for (i = 0; i < count; i++) { + if (!mask || mask[i]) { + UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]); + UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]); + UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]); + UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]); + } + } + if (useTemp) + _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort)); + } + break; + default: + _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors"); + } +} + + + + +/** + * Perform basic clipping for glDrawPixels. The image's position and size + * and the unpack SkipPixels and SkipRows are adjusted so that the image + * region is entirely within the window and scissor bounds. + * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1). + * If Pixel.ZoomY is -1, *destY will be changed to be the first row which + * we'll actually write. Beforehand, *destY-1 is the first drawing row. + * + * \return GL_TRUE if image is ready for drawing or + * GL_FALSE if image was completely clipped away (draw nothing) + */ +GLboolean +_mesa_clip_drawpixels(const GLcontext *ctx, + GLint *destX, GLint *destY, + GLsizei *width, GLsizei *height, + struct gl_pixelstore_attrib *unpack) +{ + const GLframebuffer *buffer = ctx->DrawBuffer; + + if (unpack->RowLength == 0) { + unpack->RowLength = *width; + } + + ASSERT(ctx->Pixel.ZoomX == 1.0F); + ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F); + + /* left clipping */ + if (*destX < buffer->_Xmin) { + unpack->SkipPixels += (buffer->_Xmin - *destX); + *width -= (buffer->_Xmin - *destX); + *destX = buffer->_Xmin; + } + /* right clipping */ + if (*destX + *width > buffer->_Xmax) + *width -= (*destX + *width - buffer->_Xmax); + + if (*width <= 0) + return GL_FALSE; + + if (ctx->Pixel.ZoomY == 1.0F) { + /* bottom clipping */ + if (*destY < buffer->_Ymin) { + unpack->SkipRows += (buffer->_Ymin - *destY); + *height -= (buffer->_Ymin - *destY); + *destY = buffer->_Ymin; + } + /* top clipping */ + if (*destY + *height > buffer->_Ymax) + *height -= (*destY + *height - buffer->_Ymax); + } + else { /* upside down */ + /* top clipping */ + if (*destY > buffer->_Ymax) { + unpack->SkipRows += (*destY - buffer->_Ymax); + *height -= (*destY - buffer->_Ymax); + *destY = buffer->_Ymax; + } + /* bottom clipping */ + if (*destY - *height < buffer->_Ymin) + *height -= (buffer->_Ymin - (*destY - *height)); + /* adjust destY so it's the first row to write to */ + (*destY)--; + } + + if (*height <= 0) + return GL_TRUE; + + return GL_TRUE; +} + + +/** + * Perform clipping for glReadPixels. The image's window position + * and size, and the pack skipPixels, skipRows and rowLength are adjusted + * so that the image region is entirely within the window bounds. + * Note: this is different from _mesa_clip_drawpixels() in that the + * scissor box is ignored, and we use the bounds of the current readbuffer + * surface. + * + * \return GL_TRUE if image is ready for drawing or + * GL_FALSE if image was completely clipped away (draw nothing) + */ +GLboolean +_mesa_clip_readpixels(const GLcontext *ctx, + GLint *srcX, GLint *srcY, + GLsizei *width, GLsizei *height, + struct gl_pixelstore_attrib *pack) +{ + const GLframebuffer *buffer = ctx->ReadBuffer; + + if (pack->RowLength == 0) { + pack->RowLength = *width; + } + + /* left clipping */ + if (*srcX < 0) { + pack->SkipPixels += (0 - *srcX); + *width -= (0 - *srcX); + *srcX = 0; + } + /* right clipping */ + if (*srcX + *width > (GLsizei) buffer->Width) + *width -= (*srcX + *width - buffer->Width); + + if (*width <= 0) + return GL_FALSE; + + /* bottom clipping */ + if (*srcY < 0) { + pack->SkipRows += (0 - *srcY); + *height -= (0 - *srcY); + *srcY = 0; + } + /* top clipping */ + if (*srcY + *height > (GLsizei) buffer->Height) + *height -= (*srcY + *height - buffer->Height); + + if (*height <= 0) + return GL_TRUE; + + return GL_TRUE; +} + + +/** + * Do clipping for a glCopyTexSubImage call. + * The framebuffer source region might extend outside the framebuffer + * bounds. Clip the source region against the framebuffer bounds and + * adjust the texture/dest position and size accordingly. + * + * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise. + */ +GLboolean +_mesa_clip_copytexsubimage(const GLcontext *ctx, + GLint *destX, GLint *destY, + GLint *srcX, GLint *srcY, + GLsizei *width, GLsizei *height) +{ + const struct gl_framebuffer *fb = ctx->ReadBuffer; + const GLint srcX0 = *srcX, srcY0 = *srcY; + + if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height, + srcX, srcY, width, height)) { + *destX = *destX + *srcX - srcX0; + *destY = *destY + *srcY - srcY0; + + return GL_TRUE; + } + else { + return GL_FALSE; + } +} + + + +/** + * Clip the rectangle defined by (x, y, width, height) against the bounds + * specified by [xmin, xmax) and [ymin, ymax). + * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise. + */ +GLboolean +_mesa_clip_to_region(GLint xmin, GLint ymin, + GLint xmax, GLint ymax, + GLint *x, GLint *y, + GLsizei *width, GLsizei *height ) +{ + /* left clipping */ + if (*x < xmin) { + *width -= (xmin - *x); + *x = xmin; + } + + /* right clipping */ + if (*x + *width > xmax) + *width -= (*x + *width - xmax); + + if (*width <= 0) + return GL_FALSE; + + /* bottom (or top) clipping */ + if (*y < ymin) { + *height -= (ymin - *y); + *y = ymin; + } + + /* top (or bottom) clipping */ + if (*y + *height > ymax) + *height -= (*y + *height - ymax); + + if (*height <= 0) + return GL_FALSE; + + return GL_TRUE; +} + + +/** + * Clip dst coords against Xmax (or Ymax). + */ +static INLINE void +clip_right_or_top(GLint *srcX0, GLint *srcX1, + GLint *dstX0, GLint *dstX1, + GLint maxValue) +{ + GLfloat t, bias; + + if (*dstX1 > maxValue) { + /* X1 outside right edge */ + ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */ + t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0); + /* chop off [t, 1] part */ + ASSERT(t >= 0.0 && t <= 1.0); + *dstX1 = maxValue; + bias = (*srcX0 < *srcX1) ? 0.5 : -0.5; + *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias); + } + else if (*dstX0 > maxValue) { + /* X0 outside right edge */ + ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */ + t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1); + /* chop off [t, 1] part */ + ASSERT(t >= 0.0 && t <= 1.0); + *dstX0 = maxValue; + bias = (*srcX0 < *srcX1) ? -0.5 : 0.5; + *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias); + } +} + + +/** + * Clip dst coords against Xmin (or Ymin). + */ +static INLINE void +clip_left_or_bottom(GLint *srcX0, GLint *srcX1, + GLint *dstX0, GLint *dstX1, + GLint minValue) +{ + GLfloat t, bias; + + if (*dstX0 < minValue) { + /* X0 outside left edge */ + ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */ + t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0); + /* chop off [0, t] part */ + ASSERT(t >= 0.0 && t <= 1.0); + *dstX0 = minValue; + bias = (*srcX0 < *srcX1) ? 0.5 : -0.5; /* flipped??? */ + *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias); + } + else if (*dstX1 < minValue) { + /* X1 outside left edge */ + ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */ + t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1); + /* chop off [0, t] part */ + ASSERT(t >= 0.0 && t <= 1.0); + *dstX1 = minValue; + bias = (*srcX0 < *srcX1) ? 0.5 : -0.5; + *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias); + } +} + + +/** + * Do clipping of blit src/dest rectangles. + * The dest rect is clipped against both the buffer bounds and scissor bounds. + * The src rect is just clipped against the buffer bounds. + * + * When either the src or dest rect is clipped, the other is also clipped + * proportionately! + * + * Note that X0 need not be less than X1 (same for Y) for either the source + * and dest rects. That makes the clipping a little trickier. + * + * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped + */ +GLboolean +_mesa_clip_blit(GLcontext *ctx, + GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1, + GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1) +{ + const GLint srcXmin = 0; + const GLint srcXmax = ctx->ReadBuffer->Width; + const GLint srcYmin = 0; + const GLint srcYmax = ctx->ReadBuffer->Height; + + /* these include scissor bounds */ + const GLint dstXmin = ctx->DrawBuffer->_Xmin; + const GLint dstXmax = ctx->DrawBuffer->_Xmax; + const GLint dstYmin = ctx->DrawBuffer->_Ymin; + const GLint dstYmax = ctx->DrawBuffer->_Ymax; + + /* + printf("PreClipX: src: %d .. %d dst: %d .. %d\n", + *srcX0, *srcX1, *dstX0, *dstX1); + printf("PreClipY: src: %d .. %d dst: %d .. %d\n", + *srcY0, *srcY1, *dstY0, *dstY1); + */ + + /* trivial rejection tests */ + if (*dstX0 == *dstX1) + return GL_FALSE; /* no width */ + if (*dstX0 <= dstXmin && *dstX1 <= dstXmin) + return GL_FALSE; /* totally out (left) of bounds */ + if (*dstX0 >= dstXmax && *dstX1 >= dstXmax) + return GL_FALSE; /* totally out (right) of bounds */ + + if (*dstY0 == *dstY1) + return GL_FALSE; + if (*dstY0 <= dstYmin && *dstY1 <= dstYmin) + return GL_FALSE; + if (*dstY0 >= dstYmax && *dstY1 >= dstYmax) + return GL_FALSE; + + if (*srcX0 == *srcX1) + return GL_FALSE; + if (*srcX0 <= srcXmin && *srcX1 <= srcXmin) + return GL_FALSE; + if (*srcX0 >= srcXmax && *srcX1 >= srcXmax) + return GL_FALSE; + + if (*srcY0 == *srcY1) + return GL_FALSE; + if (*srcY0 <= srcYmin && *srcY1 <= srcYmin) + return GL_FALSE; + if (*srcY0 >= srcYmax && *srcY1 >= srcYmax) + return GL_FALSE; + + /* + * dest clip + */ + clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax); + clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax); + clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin); + clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin); + + /* + * src clip (just swap src/dst values from above) + */ + clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax); + clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax); + clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin); + clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin); + + /* + printf("PostClipX: src: %d .. %d dst: %d .. %d\n", + *srcX0, *srcX1, *dstX0, *dstX1); + printf("PostClipY: src: %d .. %d dst: %d .. %d\n", + *srcY0, *srcY1, *dstY0, *dstY1); + */ + + ASSERT(*dstX0 >= dstXmin); + ASSERT(*dstX0 <= dstXmax); + ASSERT(*dstX1 >= dstXmin); + ASSERT(*dstX1 <= dstXmax); + + ASSERT(*dstY0 >= dstYmin); + ASSERT(*dstY0 <= dstYmax); + ASSERT(*dstY1 >= dstYmin); + ASSERT(*dstY1 <= dstYmax); + + ASSERT(*srcX0 >= srcXmin); + ASSERT(*srcX0 <= srcXmax); + ASSERT(*srcX1 >= srcXmin); + ASSERT(*srcX1 <= srcXmax); + + ASSERT(*srcY0 >= srcYmin); + ASSERT(*srcY0 <= srcYmax); + ASSERT(*srcY1 >= srcYmin); + ASSERT(*srcY1 <= srcYmax); + + return GL_TRUE; +} |