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diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
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+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.1
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file image.c
+ * Image handling.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "image.h"
+#include "imports.h"
+#include "histogram.h"
+#include "macros.h"
+#include "pixel.h"
+
+
+/** Compute ceiling of integer quotient of A divided by B. */
+#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
+
+
+/**
+ * Flip the 8 bits in each byte of the given array.
+ *
+ * \param p array.
+ * \param n number of bytes.
+ *
+ * \todo try this trick to flip bytes someday:
+ * \code
+ * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
+ * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
+ * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
+ * \endcode
+ */
+static void
+flip_bytes( GLubyte *p, GLuint n )
+{
+ register GLuint i, a, b;
+
+ for (i=0;i<n;i++) {
+ b = (GLuint) p[i]; /* words are often faster than bytes */
+ a = ((b & 0x01) << 7) |
+ ((b & 0x02) << 5) |
+ ((b & 0x04) << 3) |
+ ((b & 0x08) << 1) |
+ ((b & 0x10) >> 1) |
+ ((b & 0x20) >> 3) |
+ ((b & 0x40) >> 5) |
+ ((b & 0x80) >> 7);
+ p[i] = (GLubyte) a;
+ }
+}
+
+
+/**
+ * Flip the order of the 2 bytes in each word in the given array.
+ *
+ * \param p array.
+ * \param n number of words.
+ */
+void
+_mesa_swap2( GLushort *p, GLuint n )
+{
+ register GLuint i;
+
+ for (i=0;i<n;i++) {
+ p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
+ }
+}
+
+
+
+/*
+ * Flip the order of the 4 bytes in each word in the given array.
+ */
+void
+_mesa_swap4( GLuint *p, GLuint n )
+{
+ register GLuint i, a, b;
+
+ for (i=0;i<n;i++) {
+ b = p[i];
+ a = (b >> 24)
+ | ((b >> 8) & 0xff00)
+ | ((b << 8) & 0xff0000)
+ | ((b << 24) & 0xff000000);
+ p[i] = a;
+ }
+}
+
+
+/**
+ * Get the size of a GL data type.
+ *
+ * \param type GL data type.
+ *
+ * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
+ * if an invalid type enum.
+ */
+GLint
+_mesa_sizeof_type( GLenum type )
+{
+ switch (type) {
+ case GL_BITMAP:
+ return 0;
+ case GL_UNSIGNED_BYTE:
+ return sizeof(GLubyte);
+ case GL_BYTE:
+ return sizeof(GLbyte);
+ case GL_UNSIGNED_SHORT:
+ return sizeof(GLushort);
+ case GL_SHORT:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_INT:
+ return sizeof(GLuint);
+ case GL_INT:
+ return sizeof(GLint);
+ case GL_FLOAT:
+ return sizeof(GLfloat);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
+ default:
+ return -1;
+ }
+}
+
+
+/**
+ * Same as _mesa_sizeof_type() but also accepting the packed pixel
+ * format data types.
+ */
+GLint
+_mesa_sizeof_packed_type( GLenum type )
+{
+ switch (type) {
+ case GL_BITMAP:
+ return 0;
+ case GL_UNSIGNED_BYTE:
+ return sizeof(GLubyte);
+ case GL_BYTE:
+ return sizeof(GLbyte);
+ case GL_UNSIGNED_SHORT:
+ return sizeof(GLushort);
+ case GL_SHORT:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_INT:
+ return sizeof(GLuint);
+ case GL_INT:
+ return sizeof(GLint);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
+ case GL_FLOAT:
+ return sizeof(GLfloat);
+ case GL_UNSIGNED_BYTE_3_3_2:
+ return sizeof(GLubyte);
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ return sizeof(GLubyte);
+ case GL_UNSIGNED_SHORT_5_6_5:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_INT_8_8_8_8:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_10_10_10_2:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ return sizeof(GLuint);
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ return sizeof(GLushort);
+ 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;
+ 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) {
+ 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;
+ default:
+ ; /* fall-through */
+ }
+ return GL_FALSE;
+}
+
+
+/**
+ * Return the address of a specific pixel in an image (1D, 2D or 3D).
+ *
+ * Pixel unpacking/packing parameters are observed according to \p packing.
+ *
+ * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
+ * \param image starting address of image data
+ * \param width the image width
+ * \param height theimage height
+ * \param format the pixel format
+ * \param type the pixel data type
+ * \param packing the pixelstore attributes
+ * \param img which image in the volume (0 for 1D or 2D images)
+ * \param row row of pixel in the image (0 for 1D images)
+ * \param column column of pixel in the image
+ *
+ * \return address of pixel on success, or NULL on error.
+ *
+ * \sa gl_pixelstore_attrib.
+ */
+GLvoid *
+_mesa_image_address( GLuint dimensions,
+ const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint img, GLint row, GLint column )
+{
+ GLint alignment; /* 1, 2 or 4 */
+ GLint pixels_per_row;
+ GLint rows_per_image;
+ GLint skiprows;
+ GLint skippixels;
+ GLint skipimages; /* for 3-D volume images */
+ GLubyte *pixel_addr;
+
+ ASSERT(dimensions >= 1 && dimensions <= 3);
+
+ alignment = packing->Alignment;
+ if (packing->RowLength > 0) {
+ pixels_per_row = packing->RowLength;
+ }
+ else {
+ pixels_per_row = width;
+ }
+ if (packing->ImageHeight > 0) {
+ rows_per_image = packing->ImageHeight;
+ }
+ else {
+ rows_per_image = height;
+ }
+
+ skippixels = packing->SkipPixels;
+ /* Note: SKIP_ROWS _is_ used for 1D images */
+ skiprows = packing->SkipRows;
+ /* Note: SKIP_IMAGES is only used for 3D images */
+ skipimages = (dimensions == 3) ? packing->SkipImages : 0;
+
+ if (type == GL_BITMAP) {
+ /* BITMAP data */
+ GLint comp_per_pixel; /* components per pixel */
+ GLint bytes_per_comp; /* bytes per component */
+ GLint bytes_per_row;
+ GLint bytes_per_image;
+
+ /* Compute bytes per component */
+ bytes_per_comp = _mesa_sizeof_packed_type( type );
+ if (bytes_per_comp < 0) {
+ return NULL;
+ }
+
+ /* Compute number of components per pixel */
+ comp_per_pixel = _mesa_components_in_format( format );
+ if (comp_per_pixel < 0) {
+ return NULL;
+ }
+
+ bytes_per_row = alignment
+ * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
+
+ bytes_per_image = bytes_per_row * rows_per_image;
+
+ pixel_addr = (GLubyte *) image
+ + (skipimages + img) * bytes_per_image
+ + (skiprows + row) * bytes_per_row
+ + (skippixels + column) / 8;
+ }
+ else {
+ /* Non-BITMAP data */
+ GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
+ GLint topOfImage;
+
+ bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
+
+ /* The pixel type and format should have been error checked earlier */
+ assert(bytes_per_pixel > 0);
+
+ bytes_per_row = pixels_per_row * bytes_per_pixel;
+ remainder = bytes_per_row % alignment;
+ if (remainder > 0)
+ bytes_per_row += (alignment - remainder);
+
+ ASSERT(bytes_per_row % alignment == 0);
+
+ bytes_per_image = bytes_per_row * rows_per_image;
+
+ if (packing->Invert) {
+ /* set pixel_addr to the last row */
+ topOfImage = bytes_per_row * (height - 1);
+ bytes_per_row = -bytes_per_row;
+ }
+ else {
+ topOfImage = 0;
+ }
+
+ /* compute final pixel address */
+ pixel_addr = (GLubyte *) image
+ + (skipimages + img) * bytes_per_image
+ + topOfImage
+ + (skiprows + row) * bytes_per_row
+ + (skippixels + column) * bytes_per_pixel;
+ }
+
+ return (GLvoid *) pixel_addr;
+}
+
+
+GLvoid *
+_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width,
+ GLenum format, GLenum type,
+ GLint column )
+{
+ return _mesa_image_address(1, packing, image, width, 1,
+ format, type, 0, 0, column);
+}
+
+
+GLvoid *
+_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint row, GLint column )
+{
+ return _mesa_image_address(2, packing, image, width, height,
+ format, type, 0, row, column);
+}
+
+
+GLvoid *
+_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint img, GLint row, GLint column )
+{
+ return _mesa_image_address(3, packing, image, width, height,
+ format, type, img, row, column);
+}
+
+
+
+/**
+ * Compute the stride between image rows.
+ *
+ * \param packing the pixelstore attributes
+ * \param width image width.
+ * \param format pixel format.
+ * \param type pixel data type.
+ *
+ * \return the stride in bytes for the given parameters.
+ */
+GLint
+_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
+ GLint width, GLenum format, GLenum type )
+{
+ ASSERT(packing);
+ if (type == GL_BITMAP) {
+ /* BITMAP data */
+ GLint bytes;
+ if (packing->RowLength == 0) {
+ bytes = (width + 7) / 8;
+ }
+ else {
+ bytes = (packing->RowLength + 7) / 8;
+ }
+ if (packing->Invert) {
+ /* negate the bytes per row (negative row stride) */
+ bytes = -bytes;
+ }
+ return bytes;
+ }
+ else {
+ /* Non-BITMAP data */
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+ GLint bytesPerRow, remainder;
+ if (bytesPerPixel <= 0)
+ return -1; /* error */
+ if (packing->RowLength == 0) {
+ bytesPerRow = bytesPerPixel * width;
+ }
+ else {
+ bytesPerRow = bytesPerPixel * packing->RowLength;
+ }
+ remainder = bytesPerRow % packing->Alignment;
+ if (remainder > 0)
+ bytesPerRow += (packing->Alignment - remainder);
+ if (packing->Invert)
+ bytesPerRow = -bytesPerRow;
+ return bytesPerRow;
+ }
+}
+
+
+#if _HAVE_FULL_GL
+
+/*
+ * Compute the stride between images in a 3D texture (in bytes) for the given
+ * pixel packing parameters and image width, format and type.
+ */
+GLint
+_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
+ GLint width, GLint height,
+ GLenum format, GLenum type )
+{
+ ASSERT(packing);
+ ASSERT(type != GL_BITMAP);
+
+ {
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+ GLint bytesPerRow, bytesPerImage, remainder;
+
+ if (bytesPerPixel <= 0)
+ return -1; /* error */
+ if (packing->RowLength == 0) {
+ bytesPerRow = bytesPerPixel * width;
+ }
+ else {
+ bytesPerRow = bytesPerPixel * packing->RowLength;
+ }
+ remainder = bytesPerRow % packing->Alignment;
+ if (remainder > 0)
+ bytesPerRow += (packing->Alignment - remainder);
+
+ if (packing->ImageHeight == 0)
+ bytesPerImage = bytesPerRow * height;
+ else
+ bytesPerImage = bytesPerRow * packing->ImageHeight;
+
+ return bytesPerImage;
+ }
+}
+
+
+/*
+ * Unpack a 32x32 pixel polygon stipple from user memory using the
+ * current pixel unpack settings.
+ */
+void
+_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
+ const struct gl_pixelstore_attrib *unpacking )
+{
+ GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking);
+ if (ptrn) {
+ /* Convert pattern from GLubytes to GLuints and handle big/little
+ * endian differences
+ */
+ GLubyte *p = ptrn;
+ GLint i;
+ for (i = 0; i < 32; i++) {
+ dest[i] = (p[0] << 24)
+ | (p[1] << 16)
+ | (p[2] << 8)
+ | (p[3] );
+ p += 4;
+ }
+ _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 == 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 == 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;
+ }
+ }
+ }
+ }
+ src += width_in_bytes;
+ }
+}
+
+
+/**
+ * Apply various pixel transfer operations to an array of RGBA pixels
+ * as indicated by the transferOps bitmask
+ */
+void
+_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLuint transferOps,
+ GLuint n, GLfloat rgba[][4])
+{
+ /* scale & bias */
+ if (transferOps & IMAGE_SCALE_BIAS_BIT) {
+ _mesa_scale_and_bias_rgba(n, rgba,
+ ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
+ ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
+ ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
+ ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
+ }
+ /* color map lookup */
+ if (transferOps & IMAGE_MAP_COLOR_BIT) {
+ _mesa_map_rgba( ctx, n, rgba );
+ }
+ /* GL_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->ColorTable, n, rgba);
+ }
+ /* convolution */
+ if (transferOps & IMAGE_CONVOLUTION_BIT) {
+ /* this has to be done in the calling code */
+ _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
+ }
+ /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
+ if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
+ _mesa_scale_and_bias_rgba(n, rgba,
+ ctx->Pixel.PostConvolutionScale[RCOMP],
+ ctx->Pixel.PostConvolutionScale[GCOMP],
+ ctx->Pixel.PostConvolutionScale[BCOMP],
+ ctx->Pixel.PostConvolutionScale[ACOMP],
+ ctx->Pixel.PostConvolutionBias[RCOMP],
+ ctx->Pixel.PostConvolutionBias[GCOMP],
+ ctx->Pixel.PostConvolutionBias[BCOMP],
+ ctx->Pixel.PostConvolutionBias[ACOMP]);
+ }
+ /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->PostConvolutionColorTable, n, rgba);
+ }
+ /* color matrix transform */
+ if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
+ _mesa_transform_rgba(ctx, n, rgba);
+ }
+ /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->PostColorMatrixColorTable, n, rgba);
+ }
+ /* update histogram count */
+ if (transferOps & IMAGE_HISTOGRAM_BIT) {
+ _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+ }
+ /* update min/max values */
+ if (transferOps & IMAGE_MIN_MAX_BIT) {
+ _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
+ }
+ /* clamping to [0,1] */
+ if (transferOps & IMAGE_CLAMP_BIT) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+ rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+ rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+ rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+ }
+ }
+}
+
+
+
+/**
+ * Used to pack an array [][4] of RGBA float colors as specified
+ * by the dstFormat, dstType and dstPacking. Used by glReadPixels,
+ * glGetConvolutionFilter(), etc.
+ * NOTE: it's assumed the incoming float colors are all in [0,1].
+ */
+void
+_mesa_pack_rgba_span_float( GLcontext *ctx,
+ GLuint n, CONST GLfloat rgbaIn[][4],
+ GLenum dstFormat, GLenum dstType,
+ GLvoid *dstAddr,
+ const struct gl_pixelstore_attrib *dstPacking,
+ GLuint transferOps )
+{
+ const GLint comps = _mesa_components_in_format(dstFormat);
+ GLfloat luminance[MAX_WIDTH];
+ const GLfloat (*rgba)[4];
+ GLuint i;
+
+ if (transferOps) {
+ /* make copy of incoming data */
+ GLfloat rgbaCopy[MAX_WIDTH][4];
+ _mesa_memcpy(rgbaCopy, rgbaIn, n * 4 * sizeof(GLfloat));
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgbaCopy);
+ rgba = (const GLfloat (*)[4]) rgbaCopy;
+
+ if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) {
+ return;
+ }
+ }
+ else {
+ /* use incoming data, not a copy */
+ rgba = (const GLfloat (*)[4]) rgbaIn;
+ }
+
+ if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
+ /* compute luminance values */
+ if (ctx->Color.ClampReadColor == GL_TRUE) {
+ for (i = 0; i < n; i++) {
+ GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
+ luminance[i] = CLAMP(sum, 0.0F, 1.0F);
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
+ }
+ }
+ }
+
+ /*
+ * Pack/store the pixels. Ugh! Lots of cases!!!
+ */
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ }
+ break;
+ case GL_BYTE:
+ {
+ GLbyte *dst = (GLbyte *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
+ }
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
+ dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
+ dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
+ dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n * comps);
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
+ }
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
+ dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
+ dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
+ dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n * comps );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
+ dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
+ dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
+ dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n * comps );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
+ dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
+ dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
+ dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n * comps );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = rgba[i][RCOMP];
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = rgba[i][GCOMP];
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = rgba[i][BCOMP];
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = rgba[i][ACOMP];
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = luminance[i];
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = luminance[i];
+ dst[i*2+1] = rgba[i][ACOMP];
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = rgba[i][RCOMP];
+ dst[i*3+1] = rgba[i][GCOMP];
+ dst[i*3+2] = rgba[i][BCOMP];
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = rgba[i][RCOMP];
+ dst[i*4+1] = rgba[i][GCOMP];
+ dst[i*4+2] = rgba[i][BCOMP];
+ dst[i*4+3] = rgba[i][ACOMP];
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = rgba[i][BCOMP];
+ dst[i*3+1] = rgba[i][GCOMP];
+ dst[i*3+2] = rgba[i][RCOMP];
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = rgba[i][BCOMP];
+ dst[i*4+1] = rgba[i][GCOMP];
+ dst[i*4+2] = rgba[i][RCOMP];
+ dst[i*4+3] = rgba[i][ACOMP];
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = rgba[i][ACOMP];
+ dst[i*4+1] = rgba[i][BCOMP];
+ dst[i*4+2] = rgba[i][GCOMP];
+ dst[i*4+3] = rgba[i][RCOMP];
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n * comps );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = _mesa_float_to_half(luminance[i]);
+ dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n * comps );
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_3_3_2:
+ if (dstFormat == GL_RGB) {
+ GLubyte *dst = (GLubyte *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5)
+ | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2)
+ | (((GLint) (rgba[i][BCOMP] * 3.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ if (dstFormat == GL_RGB) {
+ GLubyte *dst = (GLubyte *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 3)
+ | (((GLint) (rgba[i][BCOMP] * 3.0F)) << 5);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5:
+ if (dstFormat == GL_RGB) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
+ | (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ if (dstFormat == GL_RGB) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ if (dstFormat == GL_RGBA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12)
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][ACOMP] * 15.0F)) );
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) << 12)
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][RCOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][ACOMP] * 15.0F)) );
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 12)
+ | (((GLint) (rgba[i][RCOMP] * 15.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ if (dstFormat == GL_RGBA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][RCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) )
+ | (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
+ | (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ if (dstFormat == GL_RGBA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 1)
+ | (((GLint) (rgba[i][ACOMP] * 1.0F)) );
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11)
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
+ | (((GLint) (rgba[i][RCOMP] * 31.0F)) << 1)
+ | (((GLint) (rgba[i][ACOMP] * 1.0F)) );
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) << 11)
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 6)
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 1)
+ | (((GLint) (rgba[i][RCOMP] * 1.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ if (dstFormat == GL_RGBA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 10)
+ | (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) )
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
+ | (((GLint) (rgba[i][RCOMP] * 31.0F)) << 10)
+ | (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLushort *dst = (GLushort *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) )
+ | (((GLint) (rgba[i][BCOMP] * 31.0F)) << 5)
+ | (((GLint) (rgba[i][GCOMP] * 31.0F)) << 10)
+ | (((GLint) (rgba[i][RCOMP] * 1.0F)) << 15);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ if (dstFormat == GL_RGBA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24)
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 24)
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24)
+ | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][RCOMP] * 255.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ if (dstFormat == GL_RGBA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) )
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24);
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) )
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24);
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) )
+ | (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8)
+ | (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
+ | (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_10_10_10_2:
+ if (dstFormat == GL_RGBA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 22)
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12)
+ | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 2)
+ | (((GLuint) (rgba[i][ACOMP] * 3.0F)) );
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 22)
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12)
+ | (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 2)
+ | (((GLuint) (rgba[i][ACOMP] * 3.0F)) );
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) << 22)
+ | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 12)
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 2)
+ | (((GLuint) (rgba[i][RCOMP] * 3.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ if (dstFormat == GL_RGBA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) )
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10)
+ | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 20)
+ | (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30);
+ }
+ }
+ else if (dstFormat == GL_BGRA) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) )
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10)
+ | (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 20)
+ | (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30);
+ }
+ }
+ else if (dstFormat == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) )
+ | (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 10)
+ | (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 20)
+ | (((GLuint) (rgba[i][RCOMP] * 3.0F)) << 30);
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float");
+ }
+}
+
+
+/*
+ * Pack the given RGBA span into client memory at 'dest' address
+ * in the given pixel format and type.
+ * Optionally apply the enabled pixel transfer ops.
+ * Pack into memory using the given packing params struct.
+ * This is used by glReadPixels and glGetTexImage?D()
+ * \param ctx - the context
+ * n - number of pixels in the span
+ * rgba - the pixels
+ * format - dest packing format
+ * type - dest packing data type
+ * destination - destination packing address
+ * packing - pixel packing parameters
+ * transferOps - bitmask of IMAGE_*_BIT operations to apply
+ */
+void
+_mesa_pack_rgba_span_chan( GLcontext *ctx,
+ GLuint n, CONST GLchan srcRgba[][4],
+ GLenum dstFormat, GLenum dstType,
+ GLvoid *dstAddr,
+ const struct gl_pixelstore_attrib *dstPacking,
+ GLuint transferOps)
+{
+ ASSERT((ctx->NewState & _NEW_PIXEL) == 0 || transferOps == 0);
+
+ /* Test for optimized case first */
+ if (transferOps == 0 && dstFormat == GL_RGBA && dstType == CHAN_TYPE) {
+ /* common simple case */
+ _mesa_memcpy(dstAddr, srcRgba, n * 4 * sizeof(GLchan));
+ }
+ else if (transferOps == 0 && dstFormat == GL_RGB && dstType == CHAN_TYPE) {
+ /* common simple case */
+ GLuint i;
+ GLchan *dest = (GLchan *) dstAddr;
+ for (i = 0; i < n; i++) {
+ dest[0] = srcRgba[i][RCOMP];
+ dest[1] = srcRgba[i][GCOMP];
+ dest[2] = srcRgba[i][BCOMP];
+ dest += 3;
+ }
+ }
+ else if (transferOps == 0 && dstFormat == GL_RGBA && dstType == GL_UNSIGNED_BYTE) {
+ /* common simple case */
+ GLuint i;
+ GLubyte *dest = (GLubyte *) dstAddr;
+ for (i = 0; i < n; i++) {
+ dest[0] = CHAN_TO_UBYTE(srcRgba[i][RCOMP]);
+ dest[1] = CHAN_TO_UBYTE(srcRgba[i][GCOMP]);
+ dest[2] = CHAN_TO_UBYTE(srcRgba[i][BCOMP]);
+ dest[3] = CHAN_TO_UBYTE(srcRgba[i][ACOMP]);
+ dest += 4;
+ }
+ }
+ else {
+ /* general solution */
+ GLuint i;
+ GLfloat rgba[MAX_WIDTH][4];
+ assert(n <= MAX_WIDTH);
+ /* convert color components to floating point */
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = CHAN_TO_FLOAT(srcRgba[i][RCOMP]);
+ rgba[i][GCOMP] = CHAN_TO_FLOAT(srcRgba[i][GCOMP]);
+ rgba[i][BCOMP] = CHAN_TO_FLOAT(srcRgba[i][BCOMP]);
+ rgba[i][ACOMP] = CHAN_TO_FLOAT(srcRgba[i][ACOMP]);
+ }
+ _mesa_pack_rgba_span_float(ctx, n, (const GLfloat (*)[4]) rgba,
+ dstFormat, dstType, dstAddr,
+ dstPacking, transferOps);
+ }
+}
+
+
+#define SWAP2BYTE(VALUE) \
+ { \
+ GLubyte *bytes = (GLubyte *) &(VALUE); \
+ GLubyte tmp = bytes[0]; \
+ bytes[0] = bytes[1]; \
+ bytes[1] = tmp; \
+ }
+
+#define SWAP4BYTE(VALUE) \
+ { \
+ GLubyte *bytes = (GLubyte *) &(VALUE); \
+ GLubyte tmp = bytes[0]; \
+ bytes[0] = bytes[3]; \
+ bytes[3] = tmp; \
+ tmp = bytes[1]; \
+ bytes[1] = bytes[2]; \
+ bytes[2] = tmp; \
+ }
+
+
+static void
+extract_uint_indexes(GLuint n, GLuint indexes[],
+ GLenum srcFormat, GLenum srcType, const GLvoid *src,
+ const struct gl_pixelstore_attrib *unpack )
+{
+ assert(srcFormat == GL_COLOR_INDEX);
+
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_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] & 0xfff; /* 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);
+
+ ASSERT(srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
+ srcType == GL_FLOAT ||
+ srcType == GL_UNSIGNED_BYTE_3_3_2 ||
+ srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5 ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
+ srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8 ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
+ srcType == GL_UNSIGNED_INT_10_10_10_2 ||
+ srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
+
+ rComp = gComp = bComp = aComp = -1;
+
+ switch (srcFormat) {
+ case GL_RED:
+ redIndex = 0;
+ greenIndex = blueIndex = alphaIndex = -1;
+ stride = 1;
+ break;
+ case GL_GREEN:
+ greenIndex = 0;
+ redIndex = blueIndex = alphaIndex = -1;
+ stride = 1;
+ break;
+ case GL_BLUE:
+ blueIndex = 0;
+ redIndex = greenIndex = alphaIndex = -1;
+ stride = 1;
+ break;
+ case GL_ALPHA:
+ redIndex = greenIndex = blueIndex = -1;
+ alphaIndex = 0;
+ stride = 1;
+ break;
+ case GL_LUMINANCE:
+ redIndex = greenIndex = blueIndex = 0;
+ alphaIndex = -1;
+ stride = 1;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ redIndex = greenIndex = blueIndex = 0;
+ alphaIndex = 1;
+ stride = 2;
+ break;
+ case GL_INTENSITY:
+ redIndex = greenIndex = blueIndex = alphaIndex = 0;
+ stride = 1;
+ break;
+ case GL_RGB:
+ redIndex = 0;
+ greenIndex = 1;
+ blueIndex = 2;
+ alphaIndex = -1;
+ rComp = 0;
+ gComp = 1;
+ bComp = 2;
+ aComp = 3;
+ stride = 3;
+ break;
+ case GL_BGR:
+ redIndex = 2;
+ greenIndex = 1;
+ blueIndex = 0;
+ alphaIndex = -1;
+ rComp = 2;
+ gComp = 1;
+ bComp = 0;
+ aComp = 3;
+ stride = 3;
+ break;
+ case GL_RGBA:
+ redIndex = 0;
+ greenIndex = 1;
+ blueIndex = 2;
+ alphaIndex = 3;
+ rComp = 0;
+ gComp = 1;
+ bComp = 2;
+ aComp = 3;
+ stride = 4;
+ break;
+ case GL_BGRA:
+ redIndex = 2;
+ greenIndex = 1;
+ blueIndex = 0;
+ alphaIndex = 3;
+ rComp = 2;
+ gComp = 1;
+ bComp = 0;
+ aComp = 3;
+ stride = 4;
+ break;
+ case GL_ABGR_EXT:
+ redIndex = 3;
+ greenIndex = 2;
+ blueIndex = 1;
+ alphaIndex = 0;
+ rComp = 3;
+ gComp = 2;
+ bComp = 1;
+ aComp = 0;
+ stride = 4;
+ break;
+ default:
+ _mesa_problem(NULL, "bad srcFormat in extract float data");
+ return;
+ }
+
+
+#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
+ if ((INDEX) < 0) { \
+ GLuint i; \
+ for (i = 0; i < n; i++) { \
+ rgba[i][CHANNEL] = DEFAULT; \
+ } \
+ } \
+ else if (swapBytes) { \
+ const TYPE *s = (const TYPE *) src; \
+ GLuint i; \
+ for (i = 0; i < n; i++) { \
+ TYPE value = s[INDEX]; \
+ if (sizeof(TYPE) == 2) { \
+ SWAP2BYTE(value); \
+ } \
+ else if (sizeof(TYPE) == 4) { \
+ SWAP4BYTE(value); \
+ } \
+ rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
+ s += stride; \
+ } \
+ } \
+ else { \
+ const TYPE *s = (const TYPE *) src; \
+ GLuint i; \
+ for (i = 0; i < n; i++) { \
+ rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
+ s += stride; \
+ } \
+ }
+
+ switch (srcType) {
+ case GL_UNSIGNED_BYTE:
+ PROCESS(redIndex, RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
+ break;
+ case GL_BYTE:
+ PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
+ break;
+ case GL_UNSIGNED_SHORT:
+ PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
+ break;
+ case GL_SHORT:
+ PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
+ break;
+ case GL_UNSIGNED_INT:
+ PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
+ break;
+ case GL_INT:
+ PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
+ break;
+ case GL_FLOAT:
+ PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat));
+ PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
+ PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
+ break;
+ case GL_HALF_FLOAT_ARB:
+ PROCESS(redIndex, RCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLhalfARB, _mesa_half_to_float);
+ break;
+ case GL_UNSIGNED_BYTE_3_3_2:
+ {
+ const GLubyte *ubsrc = (const GLubyte *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLubyte p = ubsrc[i];
+ rgba[i][rComp] = ((p >> 5) ) * (1.0F / 7.0F);
+ rgba[i][gComp] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
+ rgba[i][bComp] = ((p ) & 0x3) * (1.0F / 3.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ {
+ const GLubyte *ubsrc = (const GLubyte *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLubyte p = ubsrc[i];
+ rgba[i][rComp] = ((p ) & 0x7) * (1.0F / 7.0F);
+ rgba[i][gComp] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
+ rgba[i][bComp] = ((p >> 6) ) * (1.0F / 3.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
+ rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
+ rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
+ rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
+ rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
+ rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
+ rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
+ rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
+ rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
+ rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
+ rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
+ rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
+ rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ if (swapBytes) {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ SWAP2BYTE(p);
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
+ }
+ }
+ else {
+ const GLushort *ussrc = (const GLushort *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLushort p = ussrc[i];
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ if (swapBytes) {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
+ rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
+ rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+ rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
+ }
+ }
+ else {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
+ rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+ rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
+ rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ if (swapBytes) {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
+ rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+ rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
+ rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
+ }
+ }
+ else {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
+ rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
+ rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+ rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_10_10_10_2:
+ if (swapBytes) {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ SWAP4BYTE(p);
+ rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
+ rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
+ }
+ }
+ else {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
+ rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ if (swapBytes) {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ SWAP4BYTE(p);
+ rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
+ }
+ }
+ else {
+ const GLuint *uisrc = (const GLuint *) src;
+ GLuint i;
+ for (i = 0; i < n; i ++) {
+ GLuint p = uisrc[i];
+ rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
+ rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "bad srcType in extract float data");
+ break;
+ }
+}
+
+
+/*
+ * Unpack a row of color image data from a client buffer according to
+ * the pixel unpacking parameters.
+ * Return GLchan values in the specified dest image format.
+ * This is used by glDrawPixels and glTexImage?D().
+ * \param ctx - the context
+ * n - number of pixels in the span
+ * dstFormat - format of destination color array
+ * dest - the destination color array
+ * srcFormat - source image format
+ * srcType - source image data type
+ * source - source image pointer
+ * srcPacking - pixel unpacking parameters
+ * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
+ *
+ * XXX perhaps expand this to process whole images someday.
+ */
+void
+_mesa_unpack_color_span_chan( GLcontext *ctx,
+ GLuint n, GLenum dstFormat, GLchan dest[],
+ GLenum srcFormat, GLenum srcType,
+ const GLvoid *source,
+ const struct gl_pixelstore_attrib *srcPacking,
+ GLuint transferOps )
+{
+ ASSERT(dstFormat == GL_ALPHA ||
+ dstFormat == GL_LUMINANCE ||
+ dstFormat == GL_LUMINANCE_ALPHA ||
+ dstFormat == GL_INTENSITY ||
+ dstFormat == GL_RGB ||
+ dstFormat == GL_RGBA ||
+ dstFormat == GL_COLOR_INDEX);
+
+ ASSERT(srcFormat == GL_RED ||
+ srcFormat == GL_GREEN ||
+ srcFormat == GL_BLUE ||
+ srcFormat == GL_ALPHA ||
+ srcFormat == GL_LUMINANCE ||
+ srcFormat == GL_LUMINANCE_ALPHA ||
+ srcFormat == GL_INTENSITY ||
+ srcFormat == GL_RGB ||
+ srcFormat == GL_BGR ||
+ srcFormat == GL_RGBA ||
+ srcFormat == GL_BGRA ||
+ srcFormat == GL_ABGR_EXT ||
+ srcFormat == GL_COLOR_INDEX);
+
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
+ srcType == GL_FLOAT ||
+ srcType == GL_UNSIGNED_BYTE_3_3_2 ||
+ srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5 ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
+ srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8 ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
+ srcType == GL_UNSIGNED_INT_10_10_10_2 ||
+ srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
+
+ /* Try simple cases first */
+ if (transferOps == 0) {
+ if (srcType == CHAN_TYPE) {
+ if (dstFormat == GL_RGBA) {
+ if (srcFormat == GL_RGBA) {
+ _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
+ && (transferOps & IMAGE_MAP_COLOR_BIT)) {
+ _mesa_map_ci(ctx, n, indexes);
+ }
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ _mesa_shift_and_offset_ci(ctx, n, indexes);
+ }
+
+ if (dstFormat == GL_COLOR_INDEX) {
+ /* convert to GLchan and return */
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dest[i] = (GLchan) (indexes[i] & 0xff);
+ }
+ return;
+ }
+ else {
+ /* Convert indexes to RGBA */
+ _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
+ }
+
+ /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
+ * with color indexes.
+ */
+ transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
+ }
+ else {
+ /* non-color index data */
+ extract_float_rgba(n, rgba, srcFormat, srcType, source,
+ srcPacking->SwapBytes);
+ }
+
+ /* Need to clamp if returning GLubytes or GLushorts */
+#if CHAN_TYPE != GL_FLOAT
+ transferOps |= IMAGE_CLAMP_BIT;
+#endif
+
+ if (transferOps) {
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
+ }
+
+ /* Now determine which color channels we need to produce.
+ * And determine the dest index (offset) within each color tuple.
+ */
+ switch (dstFormat) {
+ case GL_ALPHA:
+ dstAlphaIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
+ dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ case GL_LUMINANCE:
+ dstLuminanceIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
+ dstIntensityIndex = -1;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ dstLuminanceIndex = 0;
+ dstAlphaIndex = 1;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
+ dstIntensityIndex = -1;
+ break;
+ case GL_INTENSITY:
+ dstIntensityIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
+ dstLuminanceIndex = -1;
+ break;
+ case GL_RGB:
+ dstRedIndex = 0;
+ dstGreenIndex = 1;
+ dstBlueIndex = 2;
+ dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ case GL_RGBA:
+ dstRedIndex = 0;
+ dstGreenIndex = 1;
+ dstBlueIndex = 2;
+ dstAlphaIndex = 3;
+ dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ default:
+ _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
+ 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,
+ GLuint transferOps )
+{
+ ASSERT(dstFormat == GL_ALPHA ||
+ dstFormat == GL_LUMINANCE ||
+ dstFormat == GL_LUMINANCE_ALPHA ||
+ dstFormat == GL_INTENSITY ||
+ dstFormat == GL_RGB ||
+ dstFormat == GL_RGBA ||
+ dstFormat == GL_COLOR_INDEX);
+
+ ASSERT(srcFormat == GL_RED ||
+ srcFormat == GL_GREEN ||
+ srcFormat == GL_BLUE ||
+ srcFormat == GL_ALPHA ||
+ srcFormat == GL_LUMINANCE ||
+ srcFormat == GL_LUMINANCE_ALPHA ||
+ srcFormat == GL_INTENSITY ||
+ srcFormat == GL_RGB ||
+ srcFormat == GL_BGR ||
+ srcFormat == GL_RGBA ||
+ srcFormat == GL_BGRA ||
+ srcFormat == GL_ABGR_EXT ||
+ srcFormat == GL_COLOR_INDEX);
+
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
+ srcType == GL_FLOAT ||
+ srcType == GL_UNSIGNED_BYTE_3_3_2 ||
+ srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5 ||
+ srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
+ srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+ srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
+ srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8 ||
+ srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
+ srcType == GL_UNSIGNED_INT_10_10_10_2 ||
+ srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
+
+ /* general solution, no special cases, yet */
+ {
+ GLint dstComponents;
+ GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
+ GLint dstLuminanceIndex, dstIntensityIndex;
+ 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
+ && (transferOps & IMAGE_MAP_COLOR_BIT)) {
+ _mesa_map_ci(ctx, n, indexes);
+ }
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ _mesa_shift_and_offset_ci(ctx, n, indexes);
+ }
+
+ if (dstFormat == GL_COLOR_INDEX) {
+ /* convert to GLchan and return */
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dest[i] = (GLchan) (indexes[i] & 0xff);
+ }
+ return;
+ }
+ else {
+ /* Convert indexes to RGBA */
+ _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
+ }
+
+ /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
+ * with color indexes.
+ */
+ transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
+ }
+ else {
+ /* non-color index data */
+ extract_float_rgba(n, rgba, srcFormat, srcType, source,
+ srcPacking->SwapBytes);
+ }
+
+ if (transferOps) {
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
+ }
+
+ /* Now determine which color channels we need to produce.
+ * And determine the dest index (offset) within each color tuple.
+ */
+ switch (dstFormat) {
+ case GL_ALPHA:
+ dstAlphaIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
+ dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ case GL_LUMINANCE:
+ dstLuminanceIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
+ dstIntensityIndex = -1;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ dstLuminanceIndex = 0;
+ dstAlphaIndex = 1;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
+ dstIntensityIndex = -1;
+ break;
+ case GL_INTENSITY:
+ dstIntensityIndex = 0;
+ dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
+ dstLuminanceIndex = -1;
+ break;
+ case GL_RGB:
+ dstRedIndex = 0;
+ dstGreenIndex = 1;
+ dstBlueIndex = 2;
+ dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ case GL_RGBA:
+ dstRedIndex = 0;
+ dstGreenIndex = 1;
+ dstBlueIndex = 2;
+ dstAlphaIndex = 3;
+ dstLuminanceIndex = dstIntensityIndex = -1;
+ break;
+ default:
+ _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()");
+ 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;
+ }
+ }
+ }
+}
+
+
+/*
+ * Unpack a row of color index data from a client buffer according to
+ * the pixel unpacking parameters.
+ * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
+ *
+ * Args: ctx - the context
+ * n - number of pixels
+ * dstType - destination data type
+ * dest - destination array
+ * srcType - source pixel type
+ * source - source data pointer
+ * srcPacking - pixel unpacking parameters
+ * transferOps - the pixel transfer operations to apply
+ */
+void
+_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest,
+ GLenum srcType, const GLvoid *source,
+ const struct gl_pixelstore_attrib *srcPacking,
+ GLuint transferOps )
+{
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
+ srcType == GL_FLOAT);
+
+ ASSERT(dstType == GL_UNSIGNED_BYTE ||
+ dstType == GL_UNSIGNED_SHORT ||
+ dstType == GL_UNSIGNED_INT);
+
+
+ transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
+
+ /*
+ * Try simple cases first
+ */
+ if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
+ && dstType == GL_UNSIGNED_BYTE) {
+ _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 & IMAGE_SHIFT_OFFSET_BIT) {
+ /* shift and offset indexes */
+ _mesa_shift_and_offset_ci(ctx, n, indexes);
+ }
+ if (transferOps & IMAGE_MAP_COLOR_BIT) {
+ /* Apply lookup table */
+ _mesa_map_ci(ctx, n, indexes);
+ }
+
+ /* convert to dest type */
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLubyte) (indexes[i] & 0xff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLushort) (indexes[i] & 0xffff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ _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,
+ GLuint transferOps )
+{
+ GLuint indexes[MAX_WIDTH];
+
+ ASSERT(n <= MAX_WIDTH);
+
+ transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
+
+ if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
+ /* make a copy of input */
+ _mesa_memcpy(indexes, source, n * sizeof(GLuint));
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ _mesa_shift_and_offset_ci( ctx, n, indexes);
+ }
+ if (transferOps & IMAGE_MAP_COLOR_BIT) {
+ _mesa_map_ci(ctx, n, indexes);
+ }
+ source = indexes;
+ }
+
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ *dst++ = (GLubyte) source[i];
+ }
+ }
+ break;
+ case GL_BYTE:
+ {
+ GLbyte *dst = (GLbyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLbyte) source[i];
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLushort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLshort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLuint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLfloat) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = _mesa_float_to_half((GLfloat) source[i]);
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
+ }
+}
+
+
+/*
+ * Unpack a row of stencil data from a client buffer according to
+ * the pixel unpacking parameters.
+ * This is (or will be) used by glDrawPixels
+ *
+ * Args: ctx - the context
+ * n - number of pixels
+ * dstType - destination data type
+ * dest - destination array
+ * srcType - source pixel type
+ * source - source data pointer
+ * srcPacking - pixel unpacking parameters
+ * transferOps - apply offset/bias/lookup ops?
+ */
+void
+_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest,
+ GLenum srcType, const GLvoid *source,
+ const struct gl_pixelstore_attrib *srcPacking,
+ GLuint transferOps )
+{
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_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 &&
+ 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) {
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ /* shift and offset indexes */
+ _mesa_shift_and_offset_ci(ctx, n, indexes);
+ }
+
+ if (ctx->Pixel.MapStencilFlag) {
+ /* Apply stencil lookup table */
+ GLuint mask = ctx->Pixel.MapStoSsize - 1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ indexes[i] = ctx->Pixel.MapStoS[ indexes[i] & mask ];
+ }
+ }
+ }
+
+ /* convert to dest type */
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLubyte) (indexes[i] & 0xff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLushort) (indexes[i] & 0xffff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ _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));
+ if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
+ _mesa_shift_and_offset_stencil( ctx, n, stencil );
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ _mesa_map_stencil( ctx, n, stencil );
+ }
+ source = stencil;
+ }
+
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ if (sizeof(GLstencil) == 8) {
+ _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:
+ if (sizeof(GLstencil) == 8) {
+ _mesa_memcpy( dest, source, n );
+ }
+ else {
+ GLbyte *dst = (GLbyte *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLbyte) source[i];
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLushort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLshort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLuint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ *dst++ = (GLint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLfloat) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = _mesa_float_to_half( (float) source[i] );
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_BITMAP:
+ if (dstPacking->LsbFirst) {
+ GLubyte *dst = (GLubyte *) dest;
+ GLint shift = 0;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ if (shift == 0)
+ *dst = 0;
+ *dst |= ((source[i] != 0) << shift);
+ shift++;
+ if (shift == 8) {
+ shift = 0;
+ dst++;
+ }
+ }
+ }
+ else {
+ GLubyte *dst = (GLubyte *) dest;
+ GLint shift = 7;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ if (shift == 7)
+ *dst = 0;
+ *dst |= ((source[i] != 0) << shift);
+ shift--;
+ if (shift < 0) {
+ shift = 7;
+ dst++;
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
+ }
+}
+
+
+void
+_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest, GLfloat depthScale,
+ GLenum srcType, const GLvoid *source,
+ const struct gl_pixelstore_attrib *srcPacking )
+{
+ GLfloat depthTemp[MAX_WIDTH], *depthValues;
+
+ if (dstType == GL_FLOAT) {
+ depthValues = (GLfloat *) dest;
+ }
+ else {
+ depthValues = depthTemp;
+ }
+
+ /* XXX we need to obey srcPacking->SwapBytes here!!! */
+ (void) srcPacking;
+
+ switch (srcType) {
+ case GL_BYTE:
+ {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = BYTE_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE:
+ {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = UBYTE_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLuint i;
+ const GLshort *src = (const GLshort *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = SHORT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLuint i;
+ const GLushort *src = (const GLushort *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = USHORT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLuint i;
+ const GLint *src = (const GLint *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = INT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint i;
+ const GLuint *src = (const GLuint *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = UINT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
+ if (dstType == GL_UNSIGNED_INT &&
+ depthScale == (GLfloat) 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++) {
+ zValues[i] = src[i] & 0xffffff00;
+ }
+ return;
+ }
+ else {
+ const GLuint *src = (const GLuint *) source;
+ const GLfloat scale = 1.0f / 0xffffff;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = (src[i] >> 8) * scale;
+ }
+ }
+ break;
+ case GL_FLOAT:
+ _mesa_memcpy(depthValues, source, n * sizeof(GLfloat));
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLuint i;
+ const GLhalfARB *src = (const GLhalfARB *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = _mesa_half_to_float(src[i]);
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
+ return;
+ }
+
+
+ /* apply depth scale and bias and clamp to [0,1] */
+ if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
+ _mesa_scale_and_bias_depth(ctx, n, depthValues);
+ }
+
+ if (dstType == GL_UNSIGNED_INT) {
+ GLuint *zValues = (GLuint *) dest;
+ GLuint i;
+ if (depthScale <= (GLfloat) 0xffffff) {
+ /* no overflow worries */
+ for (i = 0; i < n; i++) {
+ zValues[i] = (GLuint) (depthValues[i] * depthScale);
+ }
+ }
+ else {
+ /* need to use double precision to prevent overflow problems */
+ for (i = 0; i < n; i++) {
+ GLdouble z = depthValues[i] * depthScale;
+ 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(depthScale <= 65535.0);
+ for (i = 0; i < n; i++) {
+ zValues[i] = (GLushort) (depthValues[i] * depthScale);
+ }
+ }
+ else {
+ ASSERT(dstType == GL_FLOAT);
+ ASSERT(depthScale == 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) {
+ _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
+ _mesa_shift_and_offset_stencil(ctx, n, stencilCopy);
+ stencilVals = stencilCopy;
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ if (stencilVals != stencilCopy)
+ _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
+ _mesa_map_stencil(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 (format == GL_BITMAP) {
+ bytesPerRow = (width + 7) >> 3;
+ flipBytes = !unpack->LsbFirst;
+ swap2 = swap4 = GL_FALSE;
+ compsPerRow = 0;
+ }
+ else {
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+ const GLint components = _mesa_components_in_format(format);
+ GLint bytesPerComp;
+ if (bytesPerPixel <= 0 || components <= 0)
+ return NULL; /* bad format or type. generate error later */
+ bytesPerRow = bytesPerPixel * width;
+ bytesPerComp = bytesPerPixel / components;
+ flipBytes = GL_FALSE;
+ swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
+ swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
+ compsPerRow = components * width;
+ assert(compsPerRow >= width);
+ }
+
+ {
+ GLubyte *destBuffer
+ = (GLubyte *) _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);
+ _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 */
+
+
+/**
+ * Perform clipping for glDrawPixels. The image's window position
+ * and size, and the unpack SkipPixels and SkipRows are adjusted so
+ * that the image region is entirely within the window and scissor bounds.
+ * NOTE: this will only work when glPixelZoom is (1, 1).
+ *
+ * \return GL_TRUE if image is ready for drawing or
+ * GL_FALSE if image was completely clipped away (draw nothing)
+ */
+GLboolean
+_mesa_clip_drawpixels(const GLcontext *ctx,
+ GLint *destX, GLint *destY,
+ GLsizei *width, GLsizei *height,
+ struct gl_pixelstore_attrib *unpack)
+{
+ const GLframebuffer *buffer = ctx->DrawBuffer;
+
+ if (unpack->RowLength == 0) {
+ unpack->RowLength = *width;
+ }
+
+ ASSERT(ctx->Pixel.ZoomX == 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;
+
+ /* 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);
+
+ 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;
+}
+
+
+/**
+ * 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 - 1);
+
+ 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 - 1);
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}