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-rw-r--r--src/mesa/main/image.c2417
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diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
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+++ b/src/mesa/main/image.c
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+/* $Id: image.c,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.1
+ *
+ * Copyright (C) 1999 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.
+ */
+
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include "context.h"
+#include "image.h"
+#include "macros.h"
+#include "mmath.h"
+#include "pixel.h"
+#include "types.h"
+#ifdef XFree86Server
+#include "GL/xf86glx.h"
+#endif
+#endif
+
+
+
+/*
+ * Flip the 8 bits in each byte of the given array.
+ */
+void gl_flip_bytes( GLubyte *p, GLuint n )
+{
+ register GLuint i, a, b;
+
+ for (i=0;i<n;i++) {
+ b = (GLuint) p[i];
+ 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.
+ */
+void gl_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 gl_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;
+ }
+}
+
+
+
+
+/*
+ * Return the size, in bytes, of the given GL datatype.
+ * Return 0 if GL_BITMAP.
+ * Return -1 if invalid type enum.
+ */
+GLint gl_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);
+ default:
+ return -1;
+ }
+}
+
+
+/*
+ * Same as gl_sizeof_packed_type() but we also accept the
+ * packed pixel format datatypes.
+ */
+GLint gl_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_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(GLshort);
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ return sizeof(GLshort);
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ return sizeof(GLshort);
+ 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);
+ default:
+ return -1;
+ }
+}
+
+
+
+/*
+ * Return the number of components in a GL enum pixel type.
+ * Return -1 if bad format.
+ */
+GLint gl_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:
+ 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;
+ default:
+ return -1;
+ }
+}
+
+
+/*
+ * Return bytes per pixel for given format and type
+ * Return -1 if bad format or type.
+ */
+GLint gl_bytes_per_pixel( GLenum format, GLenum type )
+{
+ GLint comps = gl_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_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(GLshort);
+ 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;
+ default:
+ return -1;
+ }
+}
+
+
+/*
+ * Test if the given pixel format and type are legal.
+ * Return GL_TRUE for legal, GL_FALSE for illegal.
+ */
+GLboolean gl_is_legal_format_and_type( 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;
+ default:
+ return GL_FALSE;
+ }
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_DEPTH_COMPONENT:
+ 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;
+ 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;
+ 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;
+ default:
+ return GL_FALSE;
+ }
+ default:
+ ; /* fall-through */
+ }
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Return the address of a pixel in an image (actually a volume).
+ * Pixel unpacking/packing parameters are observed according to 'packing'.
+ * Input: image - start of image data
+ * width, height - size of image
+ * format - image format
+ * type - pixel component type
+ * packing - the pixelstore attributes
+ * img - which image in the volume (0 for 1D or 2D images)
+ * row, column - location of pixel in the image
+ * Return: address of pixel at (image,row,column) in image or NULL if error.
+ */
+GLvoid *gl_pixel_addr_in_image( 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;
+
+ 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;
+ }
+ skiprows = packing->SkipRows;
+ skippixels = packing->SkipPixels;
+ skipimages = packing->SkipImages;
+
+ 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 = gl_sizeof_packed_type( type );
+ if (bytes_per_comp<0) {
+ return NULL;
+ }
+
+ /* Compute number of components per pixel */
+ comp_per_pixel = gl_components_in_format( format );
+ if (comp_per_pixel<0 && type != GL_BITMAP) {
+ 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;
+
+ bytes_per_pixel = gl_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;
+
+ /* compute final pixel address */
+ pixel_addr = (GLubyte *) image
+ + (skipimages + img) * bytes_per_image
+ + (skiprows + row) * bytes_per_row
+ + (skippixels + column) * bytes_per_pixel;
+ }
+
+ return (GLvoid *) pixel_addr;
+}
+
+
+
+/*
+ * Allocate a new gl_image. All fields are initialized to zero.
+ */
+static struct gl_image *alloc_image( void )
+{
+ return (struct gl_image *) calloc(sizeof(struct gl_image), 1);
+}
+
+
+
+/*
+ * Allocate a new gl_image with the error flag set.
+ */
+static struct gl_image *alloc_error_image( GLint width, GLint height,
+ GLint depth, GLenum format,
+ GLenum type )
+{
+ struct gl_image *image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = depth;
+ image->Format = format;
+ image->Type = type;
+ image->ErrorFlag = GL_TRUE;
+ }
+ return image;
+}
+
+
+
+/*
+ * Free a gl_image.
+ */
+void gl_free_image( struct gl_image *image )
+{
+ if (image->Data) {
+ free(image->Data);
+ }
+ free(image);
+}
+
+
+
+/*
+ * Do error checking on an image. If there's an error, register it and
+ * return GL_TRUE, else return GL_FALSE.
+ */
+GLboolean gl_image_error_test( GLcontext *ctx, const struct gl_image *image,
+ const char *msg )
+{
+ if (!image) {
+ gl_error( ctx, GL_OUT_OF_MEMORY, msg );
+ return GL_TRUE;
+ }
+ if (image->Width <= 0 || image->Height <= 0 || image->Depth <= 0) {
+ gl_error( ctx, GL_INVALID_VALUE, msg );
+ return GL_TRUE;
+ }
+ else {
+ return GL_FALSE;
+ }
+}
+
+
+
+/*
+ * Unpack a depth-buffer image storing values as GLshort, GLuint, or GLfloats.
+ * Input: type - datatype of src depth image
+ * Return pointer to a new gl_image structure.
+ *
+ * Notes: if the source image type is GLushort then the gl_image will
+ * also store GLushorts. If the src image type is GLuint then the gl_image
+ * will also store GLuints. For all other src image types the gl_image
+ * will store GLfloats. The integer cases can later be optimized.
+ */
+static struct gl_image *
+unpack_depth_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
+ const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing)
+
+{
+ struct gl_image *image;
+ GLfloat *fDst;
+ GLushort *sDst;
+ GLuint *iDst;
+ GLint i, j;
+
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = 1;
+ image->Components = 1;
+ image->Format = GL_DEPTH_COMPONENT;
+ if (type==GL_UNSIGNED_SHORT) {
+ image->Type = GL_UNSIGNED_SHORT;
+ image->Data = malloc( width * height * sizeof(GLushort));
+ }
+ else if (type==GL_UNSIGNED_INT) {
+ image->Type = GL_UNSIGNED_INT;
+ image->Data = malloc( width * height * sizeof(GLuint));
+ }
+ else {
+ image->Type = GL_FLOAT;
+ image->Data = malloc( width * height * sizeof(GLfloat));
+ }
+ image->RefCount = 0;
+ if (!image->Data)
+ return image;
+ }
+ else {
+ return NULL;
+ }
+
+ fDst = (GLfloat *) image->Data;
+ sDst = (GLushort *) image->Data;
+ iDst = (GLuint *) image->Data;
+
+ for (i=0;i<height;i++) {
+ GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
+ width, height,
+ GL_DEPTH_COMPONENT, type,
+ 0, i, 0 );
+ if (!src) {
+ return image;
+ }
+
+ switch (type) {
+ case GL_BYTE:
+ assert(image->Type == GL_FLOAT);
+ for (j=0; j<width; j++) {
+ *fDst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
+ }
+ break;
+ case GL_UNSIGNED_BYTE:
+ assert(image->Type == GL_FLOAT);
+ for (j=0; j<width; j++) {
+ *fDst++ = UBYTE_TO_FLOAT(((GLubyte*)src)[j]);
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ assert(image->Type == GL_UNSIGNED_SHORT);
+ MEMCPY( sDst, src, width * sizeof(GLushort) );
+ if (packing->SwapBytes) {
+ gl_swap2( sDst, width );
+ }
+ sDst += width;
+ break;
+ case GL_SHORT:
+ assert(image->Type == GL_FLOAT);
+ if (packing->SwapBytes) {
+ for (j=0;j<width;j++) {
+ GLshort value = ((GLshort*)src)[j];
+ value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
+ *fDst++ = SHORT_TO_FLOAT(value);
+ }
+ }
+ else {
+ for (j=0;j<width;j++) {
+ *fDst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
+ }
+ }
+ break;
+ case GL_INT:
+ assert(image->Type == GL_FLOAT);
+ if (packing->SwapBytes) {
+ for (j=0;j<width;j++) {
+ GLint value = ((GLint*)src)[j];
+ value = ((value >> 24) & 0x000000ff) |
+ ((value >> 8) & 0x0000ff00) |
+ ((value << 8) & 0x00ff0000) |
+ ((value << 24) & 0xff000000);
+ *fDst++ = INT_TO_FLOAT(value);
+ }
+ }
+ else {
+ for (j=0;j<width;j++) {
+ *fDst++ = INT_TO_FLOAT(((GLint*)src)[j]);
+ }
+ }
+ iDst += width;
+ break;
+ case GL_UNSIGNED_INT:
+ assert(image->Type == GL_UNSIGNED_INT);
+ MEMCPY( iDst, src, width * sizeof(GLuint) );
+ if (packing->SwapBytes) {
+ gl_swap4( iDst, width );
+ }
+ iDst += width;
+ break;
+ case GL_FLOAT:
+ assert(image->Type == GL_FLOAT);
+ MEMCPY( fDst, src, width * sizeof(GLfloat) );
+ if (packing->SwapBytes) {
+ gl_swap4( (GLuint*) fDst, width );
+ }
+ fDst += width;
+ break;
+ default:
+ gl_problem(ctx, "unpack_depth_image type" );
+ return image;
+ }
+ }
+
+ return image;
+}
+
+
+
+/*
+ * Unpack a stencil image. Store as GLubytes in a gl_image structure.
+ * Return: pointer to new gl_image structure.
+ */
+static struct gl_image *
+unpack_stencil_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
+ const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_image *image;
+ GLubyte *dst;
+ GLint i, j;
+
+ assert(sizeof(GLstencil) == sizeof(GLubyte));
+
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = 1;
+ image->Components = 1;
+ image->Format = GL_STENCIL_INDEX;
+ image->Type = GL_UNSIGNED_BYTE;
+ image->Data = malloc( width * height * sizeof(GLubyte));
+ image->RefCount = 0;
+ if (!image->Data)
+ return image;
+ }
+ else {
+ return NULL;
+ }
+
+ dst = (GLubyte *) image->Data;
+
+ for (i=0;i<height;i++) {
+ GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
+ width, height,
+ GL_STENCIL_INDEX, type,
+ 0, i, 0 );
+ if (!src) {
+ return image;
+ }
+
+ switch (type) {
+ case GL_UNSIGNED_BYTE:
+ case GL_BYTE:
+ MEMCPY( dst, src, width * sizeof(GLubyte) );
+ dst += width * sizeof(GLubyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ case GL_SHORT:
+ if (packing->SwapBytes) {
+ /* grab upper byte */
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLushort*)src)[j] & 0xff00) >> 8;
+ }
+ }
+ else {
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLushort*)src)[j]) & 0xff;
+ }
+ }
+ break;
+ case GL_INT:
+ if (packing->SwapBytes) {
+ /* grab upper byte */
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
+ }
+ }
+ else {
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLuint*)src)[j]) & 0xff;
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ if (packing->SwapBytes) {
+ /* grab upper byte */
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
+ }
+ }
+ else {
+ for (j=0; j < width; j++) {
+ *dst++ = (((GLuint*)src)[j]) & 0xff;
+ }
+ }
+ break;
+ case GL_FLOAT:
+ if (packing->SwapBytes) {
+ for (j=0; j < width; j++) {
+ GLfloat fvalue;
+ GLint value = ((GLuint*)src)[j];
+ value = ((value & 0xff000000) >> 24)
+ | ((value & 0x00ff0000) >> 8)
+ | ((value & 0x0000ff00) << 8)
+ | ((value & 0x000000ff) << 24);
+ fvalue = *((GLfloat*) &value);
+ *dst++ = ((GLint) fvalue) & 0xff;
+ }
+ }
+ else {
+ for (j=0; j < width; j++) {
+ GLfloat fvalue = ((GLfloat *)src)[j];
+ *dst++ = ((GLint) fvalue) & 0xff;
+ }
+ }
+ break;
+ default:
+ gl_problem(ctx, "unpack_stencil_image type" );
+ return image;
+ }
+ }
+
+ return image;
+}
+
+
+
+/*
+ * Unpack a bitmap, return a new gl_image struct.
+ */
+static struct gl_image *
+unpack_bitmap( GLcontext *ctx, GLenum format, GLint width, GLint height,
+ const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_image *image;
+ GLint bytes, i, width_in_bytes;
+ GLubyte *buffer, *dst;
+
+ assert(format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX);
+
+ /* Alloc dest storage */
+ bytes = ((width+7)/8 * height);
+ if (bytes>0 && pixels!=NULL) {
+ buffer = (GLubyte *) malloc( bytes );
+ if (!buffer) {
+ return NULL;
+ }
+ /* Copy/unpack pixel data to buffer */
+ width_in_bytes = CEILING( width, 8 );
+ dst = buffer;
+ for (i=0; i<height; i++) {
+ GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
+ width, height,
+ GL_COLOR_INDEX, GL_BITMAP,
+ 0, i, 0 );
+ if (!src) {
+ free(buffer);
+ return NULL;
+ }
+ MEMCPY( dst, src, width_in_bytes );
+ dst += width_in_bytes;
+ }
+ /* Bit flipping */
+ if (packing->LsbFirst) {
+ gl_flip_bytes( buffer, bytes );
+ }
+ }
+ else {
+ /* a 'null' bitmap */
+ buffer = NULL;
+ }
+
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = 1;
+ image->Components = 0;
+ image->Format = format;
+ image->Type = GL_BITMAP;
+ image->Data = buffer;
+ image->RefCount = 0;
+ }
+ else {
+ free( buffer );
+ return NULL;
+ }
+
+ return image;
+}
+
+
+
+/*
+ * Unpack a 32x32 pixel polygon stipple from user memory using the
+ * current pixel unpack settings.
+ */
+void gl_unpack_polygon_stipple( const GLcontext *ctx,
+ const GLubyte *pattern, GLuint dest[32] )
+{
+ GLint i;
+ for (i = 0; i < 32; i++) {
+ GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( &ctx->Unpack, pattern,
+ 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
+ dest[i] = (src[0] << 24)
+ | (src[1] << 16)
+ | (src[2] << 8)
+ | (src[3] );
+ }
+
+ /* Bit flipping within each byte */
+ if (ctx->Unpack.LsbFirst) {
+ gl_flip_bytes( (GLubyte *) dest, 32 * 4 );
+ }
+}
+
+
+
+/*
+ * Pack polygon stipple into user memory given current pixel packing
+ * settings.
+ */
+void gl_pack_polygon_stipple( const GLcontext *ctx,
+ const GLuint pattern[32],
+ GLubyte *dest )
+{
+ GLint i;
+ for (i = 0; i < 32; i++) {
+ GLubyte *dst = (GLubyte *) gl_pixel_addr_in_image( &ctx->Pack, dest,
+ 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
+ dst[0] = (pattern[i] >> 24) & 0xff;
+ dst[1] = (pattern[i] >> 16) & 0xff;
+ dst[2] = (pattern[i] >> 8) & 0xff;
+ dst[3] = (pattern[i] ) & 0xff;
+
+ /* Bit flipping within each byte */
+ if (ctx->Pack.LsbFirst) {
+ gl_flip_bytes( (GLubyte *) dst, 4 );
+ }
+ }
+}
+
+
+
+/*
+ * Unpack an RGBA or CI image and store it as unsigned bytes
+ */
+static struct gl_image *
+unpack_ubyte_image( GLcontext *ctx, GLint width, GLint height,
+ GLint depth, GLenum format, const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_image *image;
+ GLint width_in_bytes;
+ GLint components;
+ GLubyte *buffer, *dst;
+ GLint i, d;
+
+ components = gl_components_in_format( format );
+
+ width_in_bytes = width * components * sizeof(GLubyte);
+ buffer = (GLubyte *) malloc( height * width_in_bytes * depth );
+ if (!buffer) {
+ return NULL;
+ }
+
+ /* Copy/unpack pixel data to buffer */
+ dst = buffer;
+ for (d=0; d<depth; d++ ) {
+ for (i=0;i<height;i++) {
+ GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( packing,
+ pixels, width, height, format, GL_UNSIGNED_BYTE,
+ d, i, 0 );
+ if (!src) {
+ free(buffer);
+ return NULL;
+ }
+ MEMCPY( dst, src, width_in_bytes );
+ dst += width_in_bytes;
+ }
+ }
+
+ if (format == GL_BGR) {
+ /* swap order of every ubyte triplet from BGR to RGB */
+ for (i=0; i<width*height; i++) {
+ GLubyte b = buffer[i*3+0];
+ GLubyte r = buffer[i*3+2];
+ buffer[i*3+0] = r;
+ buffer[i*3+2] = b;
+ }
+ }
+ else if (format == GL_BGRA) {
+ /* swap order of every ubyte quadruplet from BGRA to RGBA */
+ for (i=0; i<width*height; i++) {
+ GLubyte b = buffer[i*4+0];
+ GLubyte r = buffer[i*4+2];
+ buffer[i*4+0] = r;
+ buffer[i*4+2] = b;
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ /* swap order of every ubyte quadruplet from ABGR to RGBA */
+ for (i=0; i<width*height; i++) {
+ GLubyte a = buffer[i*4+0];
+ GLubyte b = buffer[i*4+1];
+ GLubyte g = buffer[i*4+2];
+ GLubyte r = buffer[i*4+3];
+ buffer[i*4+0] = r;
+ buffer[i*4+1] = g;
+ buffer[i*4+2] = b;
+ buffer[i*4+3] = a;
+ }
+ }
+
+
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = depth;
+ image->Components = components;
+ if (format == GL_BGR)
+ image->Format = GL_RGB;
+ else if (format == GL_BGRA)
+ image->Format = GL_RGBA;
+ else if (format == GL_ABGR_EXT)
+ image->Format = GL_RGBA;
+ else
+ image->Format = format;
+ image->Type = GL_UNSIGNED_BYTE;
+ image->Data = buffer;
+ image->RefCount = 0;
+ }
+ else {
+ free( buffer );
+ }
+
+ return image;
+}
+
+
+
+/*
+ * Unpack a color image storing image as GLfloats
+ */
+static struct gl_image *
+unpack_float_image( GLcontext *ctx, GLint width, GLint height, GLint depth,
+ GLenum format, GLenum type, const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_image *image;
+ GLfloat *dst;
+ GLint elems_per_row;
+ GLint components;
+ GLint i, j, d;
+ GLboolean normalize;
+
+ assert(type != GL_BITMAP);
+
+ components = gl_components_in_format( format );
+ assert(components > 0); /* should have been caught earlier */
+
+ if (!gl_is_legal_format_and_type( format, type )) {
+ /* bad pixel type for format, make dummy image */
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = depth;
+ image->Components = components;
+ image->Format = format;
+ image->Type = type;
+ image->Data = NULL;
+ image->RefCount = 0;
+ }
+ return image;
+ }
+
+ elems_per_row = width * components;
+
+ image = alloc_image();
+ if (image) {
+ image->Width = width;
+ image->Height = height;
+ image->Depth = depth;
+ image->Components = components;
+ if (format == GL_BGR)
+ image->Format = GL_RGB;
+ else if (format == GL_BGRA)
+ image->Format = GL_RGBA;
+ else if (format == GL_ABGR_EXT)
+ image->Format = GL_RGBA;
+ else
+ image->Format = format;
+ image->Type = GL_FLOAT;
+ image->Data = malloc( elems_per_row * height * depth * sizeof(GLfloat));
+ image->RefCount = 0;
+ if (!image->Data)
+ return image;
+ }
+ else {
+ return NULL;
+ }
+
+ normalize = (format != GL_COLOR_INDEX) && (format != GL_STENCIL_INDEX);
+
+ dst = (GLfloat *) image->Data;
+
+ for (d=0; d<depth; d++) {
+ for (i=0;i<height;i++) {
+ GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
+ width, height,
+ format, type,
+ d, i, 0 );
+ if (!src) {
+ return image;
+ }
+
+ switch (type) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *ubsrc = (GLubyte *) src;
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = UBYTE_TO_FLOAT(ubsrc[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ubsrc[j];
+ }
+ }
+ }
+ break;
+ case GL_BYTE:
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ((GLbyte*)src)[j];
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ if (packing->SwapBytes) {
+ for (j=0;j<elems_per_row;j++) {
+ GLushort value = ((GLushort*)src)[j];
+ value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
+ if (normalize) {
+ *dst++ = USHORT_TO_FLOAT(value);
+ }
+ else {
+ *dst++ = (GLfloat) value;
+ }
+ }
+ }
+ else {
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = USHORT_TO_FLOAT(((GLushort*)src)[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ((GLushort*)src)[j];
+ }
+ }
+ }
+ break;
+ case GL_SHORT:
+ if (packing->SwapBytes) {
+ for (j=0;j<elems_per_row;j++) {
+ GLshort value = ((GLshort*)src)[j];
+ value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
+ if (normalize) {
+ *dst++ = SHORT_TO_FLOAT(value);
+ }
+ else {
+ *dst++ = (GLfloat) value;
+ }
+ }
+ }
+ else {
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ((GLshort*)src)[j];
+ }
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ if (packing->SwapBytes) {
+ GLuint value;
+ for (j=0;j<elems_per_row;j++) {
+ value = ((GLuint*)src)[j];
+ value = ((value & 0xff000000) >> 24)
+ | ((value & 0x00ff0000) >> 8)
+ | ((value & 0x0000ff00) << 8)
+ | ((value & 0x000000ff) << 24);
+ if (normalize) {
+ *dst++ = UINT_TO_FLOAT(value);
+ }
+ else {
+ *dst++ = (GLfloat) value;
+ }
+ }
+ }
+ else {
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = UINT_TO_FLOAT(((GLuint*)src)[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ((GLuint*)src)[j];
+ }
+ }
+ }
+ break;
+ case GL_INT:
+ if (packing->SwapBytes) {
+ GLint value;
+ for (j=0;j<elems_per_row;j++) {
+ value = ((GLint*)src)[j];
+ value = ((value & 0xff000000) >> 24)
+ | ((value & 0x00ff0000) >> 8)
+ | ((value & 0x0000ff00) << 8)
+ | ((value & 0x000000ff) << 24);
+ if (normalize) {
+ *dst++ = INT_TO_FLOAT(value);
+ }
+ else {
+ *dst++ = (GLfloat) value;
+ }
+ }
+ }
+ else {
+ if (normalize) {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = INT_TO_FLOAT(((GLint*)src)[j]);
+ }
+ }
+ else {
+ for (j=0;j<elems_per_row;j++) {
+ *dst++ = (GLfloat) ((GLint*)src)[j];
+ }
+ }
+ }
+ break;
+ case GL_FLOAT:
+ if (packing->SwapBytes) {
+ GLint value;
+ for (j=0;j<elems_per_row;j++) {
+ value = ((GLuint*)src)[j];
+ value = ((value & 0xff000000) >> 24)
+ | ((value & 0x00ff0000) >> 8)
+ | ((value & 0x0000ff00) << 8)
+ | ((value & 0x000000ff) << 24);
+ *dst++ = *((GLfloat*) &value);
+ }
+ }
+ else {
+ MEMCPY( dst, src, elems_per_row*sizeof(GLfloat) );
+ dst += elems_per_row;
+ }
+ break;
+ case GL_UNSIGNED_BYTE_3_3_2:
+ {
+ GLubyte *ubsrc = (GLubyte *) src;
+ for (j=0;j<width;j++) {
+ GLubyte p = ubsrc[j];
+ *dst++ = ((p >> 5) ) * (1.0F / 7.0F); /* red */
+ *dst++ = ((p >> 2) & 0x7) * (1.0F / 7.0F); /* green */
+ *dst++ = ((p ) & 0x3) * (1.0F / 3.0F); /* blue */
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ {
+ GLubyte *ubsrc = (GLubyte *) src;
+ for (j=0;j<width;j++) {
+ GLubyte p = ubsrc[j];
+ *dst++ = ((p ) & 0x7) * (1.0F / 7.0F); /* red */
+ *dst++ = ((p >> 3) & 0x7) * (1.0F / 7.0F); /* green */
+ *dst++ = ((p >> 6) ) * (1.0F / 3.0F); /* blue */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
+ *dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
+ *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* blue */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
+ *dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
+ *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* blue */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* red */
+ *dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* green */
+ *dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* blue */
+ *dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* alpha */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* red */
+ *dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* green */
+ *dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* blue */
+ *dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* alpha */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
+ *dst++ = ((p >> 6) & 0x1f) * (1.0F / 31.0F); /* green */
+ *dst++ = ((p >> 1) & 0x1f) * (1.0F / 31.0F); /* blue */
+ *dst++ = ((p ) & 0x1) * (1.0F / 1.0F); /* alpha */
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ {
+ GLushort *ussrc = (GLushort *) src;
+ for (j=0;j<width;j++) {
+ GLushort p = ussrc[j];
+ *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
+ *dst++ = ((p >> 5) & 0x1f) * (1.0F / 31.0F); /* green */
+ *dst++ = ((p >> 10) & 0x1f) * (1.0F / 31.0F); /* blue */
+ *dst++ = ((p >> 15) ) * (1.0F / 1.0F); /* alpha */
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ {
+ GLuint *uisrc = (GLuint *) src;
+ for (j=0;j<width;j++) {
+ GLuint p = uisrc[j];
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ {
+ GLuint *uisrc = (GLuint *) src;
+ for (j=0;j<width;j++) {
+ GLuint p = uisrc[j];
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
+ *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_10_10_10_2:
+ {
+ GLuint *uisrc = (GLuint *) src;
+ for (j=0;j<width;j++) {
+ GLuint p = uisrc[j];
+ *dst++ = ((p >> 22) ) * (1.0F / 1023.0F); /* r */
+ *dst++ = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F); /* g */
+ *dst++ = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F); /* b */
+ *dst++ = ((p ) & 0x3 ) * (1.0F / 3.0F); /* a */
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ {
+ GLuint *uisrc = (GLuint *) src;
+ for (j=0;j<width;j++) {
+ GLuint p = uisrc[j];
+ *dst++ = ((p ) & 0x3ff) * (1.0F / 1023.0F); /* r*/
+ *dst++ = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F); /* g */
+ *dst++ = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F); /* b */
+ *dst++ = ((p >> 30) ) * (1.0F / 3.0F); /* a */
+ }
+ }
+ break;
+ default:
+ gl_problem(ctx, "unpack_float_image type" );
+ return image;
+ }
+ }
+ }
+
+ if (format == GL_BGR) {
+ /* swap order of every float triplet from BGR to RGBA */
+ GLfloat *buffer = (GLfloat *) image->Data;
+ for (i=0; i<width*height*depth; i++) {
+ GLfloat b = buffer[i*3+0];
+ GLfloat r = buffer[i*3+2];
+ buffer[i*3+0] = r;
+ buffer[i*3+2] = b;
+ }
+ }
+ else if (format == GL_BGRA) {
+ /* swap order of every float quadruplet from BGRA to RGBA */
+ GLfloat *buffer = (GLfloat *) image->Data;
+ for (i=0; i<width*height*depth; i++) {
+ GLfloat b = buffer[i*4+0];
+ GLfloat r = buffer[i*4+2];
+ buffer[i*4+0] = r;
+ buffer[i*4+2] = b;
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ /* swap order of every float quadruplet from ABGR to RGBA */
+ GLfloat *buffer = (GLfloat *) image->Data;
+ for (i=0; i<width*height*depth; i++) {
+ GLfloat a = buffer[i*4+0];
+ GLfloat b = buffer[i*4+1];
+ GLfloat g = buffer[i*4+2];
+ GLfloat r = buffer[i*4+3];
+ buffer[i*4+0] = r;
+ buffer[i*4+1] = g;
+ buffer[i*4+2] = b;
+ buffer[i*4+3] = a;
+ }
+ }
+
+ return image;
+}
+
+
+
+/*
+ * Unpack a bitmap image, using current glPixelStore parameters,
+ * making a new gl_image.
+ */
+struct gl_image *gl_unpack_bitmap( GLcontext *ctx,
+ GLsizei width, GLsizei height,
+ const GLubyte *bitmap,
+ const struct gl_pixelstore_attrib *packing )
+{
+ return gl_unpack_image( ctx, width, height,
+ GL_COLOR_INDEX, GL_BITMAP, bitmap, packing );
+}
+
+
+
+/*
+ * Unpack a 2-D image from user's buffer. Return pointer to new
+ * gl_image struct.
+ *
+ * Input: width, height - size in pixels
+ * format - format of incoming pixel data
+ * type - datatype of incoming pixel data
+ * pixels - pointer to unpacked image in user buffer
+ */
+struct gl_image *gl_unpack_image( GLcontext *ctx,
+ GLint width, GLint height,
+ GLenum format, GLenum type,
+ const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ return gl_unpack_image3D( ctx, width, height, 1,
+ format, type, pixels, packing );
+}
+
+
+
+/*
+ * Unpack a 1, 2 or 3-D image from user-supplied address, returning a
+ * pointer to a new gl_image struct.
+ * This function is always called by a higher-level unpack function such
+ * as gl_unpack_texsubimage() or gl_unpack_bitmap().
+ *
+ * Input: width, height, depth - size in pixels
+ * format - format of incoming pixel data
+ * type - datatype of incoming pixel data
+ * pixels - pointer to unpacked image.
+ */
+struct gl_image *gl_unpack_image3D( GLcontext *ctx,
+ GLint width, GLint height, GLint depth,
+ GLenum format, GLenum type,
+ const GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing)
+{
+ if (width <= 0 || height <= 0 || depth <= 0) {
+ return alloc_error_image(width, height, depth, format, type);
+ }
+
+ if (type==GL_BITMAP) {
+ if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
+ return alloc_error_image(width, height, depth, format, type);
+ }
+ else {
+ return unpack_bitmap( ctx, format, width, height, pixels, packing );
+ }
+ }
+ else if (format==GL_DEPTH_COMPONENT) {
+ /* TODO: pack as GLdepth values (GLushort or GLuint) */
+ return unpack_depth_image( ctx, type, width, height, pixels, packing );
+ }
+ else if (format==GL_STENCIL_INDEX) {
+ /* TODO: pack as GLstencil (GLubyte or GLushort) */
+ return unpack_stencil_image( ctx, type, width, height, pixels, packing );
+ }
+ else if (type==GL_UNSIGNED_BYTE) {
+ /* upack, convert to GLubytes */
+ return unpack_ubyte_image( ctx, width, height, depth, format, pixels, packing );
+ }
+ else {
+ /* upack, convert to floats */
+ return unpack_float_image( ctx, width, height, depth,
+ format, type, pixels, packing );
+ }
+
+ /* never get here */
+ /*return NULL;*/
+}
+
+
+/*
+ * Apply pixel-transfer operations (scale, bias, mapping) to a single row
+ * of a gl_image. Put resulting color components into result array.
+ */
+void gl_scale_bias_map_image_data( const GLcontext *ctx,
+ const struct gl_image *image,
+ GLint row, GLubyte result[] )
+{
+ GLint start, i;
+
+ assert(ctx);
+ assert(image);
+ assert(result);
+ assert(row >= 0);
+
+ start = row * image->Width * image->Components;
+
+ for (i=0; i < image->Width; i++) {
+ GLint pos = start+i;
+ GLfloat red, green, blue, alpha;
+ if (image->Type == GL_UNSIGNED_BYTE) {
+ const GLubyte *data = (GLubyte *) image->Data;
+ switch (image->Format) {
+ case GL_RED:
+ red = data[pos] * (1.0F/255.0F);
+ green = 0;
+ blue = 0;
+ alpha = 0;
+ break;
+ case GL_RGB:
+ red = data[pos*3+0] * (1.0F/255.0F);
+ green = data[pos*3+1] * (1.0F/255.0F);
+ blue = data[pos*3+2] * (1.0F/255.0F);
+ alpha = 0;
+ break;
+ default:
+ gl_problem(ctx, "bad image format in gl_scale...image_data");
+ return;
+ }
+ }
+ else if (image->Type == GL_FLOAT) {
+ const GLubyte *data = (GLubyte *) image->Data;
+ switch (image->Format) {
+ case GL_RED:
+ red = data[pos];
+ green = 0;
+ blue = 0;
+ alpha = 0;
+ break;
+ case GL_RGB:
+ red = data[pos*3+0];
+ green = data[pos*3+1];
+ blue = data[pos*3+2];
+ alpha = 0;
+ break;
+ default:
+ gl_problem(ctx, "bad image format in gl_scale...image_data");
+ return;
+ }
+ }
+ else {
+ gl_problem(ctx, "Bad image type in gl_scale_...image_data");
+ return;
+ }
+
+ assert(red >= 0.0 && red <= 1.0);
+ assert(green >= 0.0 && green <= 1.0);
+ assert(blue >= 0.0 && blue <= 1.0);
+ assert(alpha >= 0.0 && alpha <= 1.0);
+
+ /*
+ if (scale or bias) {
+
+
+ }
+ if (mapping) {
+
+ }
+ */
+
+ result[i*4+0] = (GLubyte) (red * 255.0);
+ result[i*4+1] = (GLubyte) (green * 255.0);
+ result[i*4+2] = (GLubyte) (blue * 255.0);
+ result[i*4+3] = (GLubyte) (alpha * 255.0);
+ }
+}
+
+
+
+/*
+ * 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()
+ * Input: ctx - the context
+ * n - number of pixels in the span
+ * rgba - the pixels
+ * format - dest packing format
+ * type - dest packing datatype
+ * destination - destination packing address
+ * packing - pixel packing parameters
+ * applyTransferOps - apply scale/bias/lookup-table ops?
+ */
+void gl_pack_rgba_span( const GLcontext *ctx,
+ GLuint n, CONST GLubyte rgba[][4],
+ GLenum format, GLenum type, GLvoid *destination,
+ const struct gl_pixelstore_attrib *packing,
+ GLboolean applyTransferOps )
+{
+ /* Test for optimized case first */
+ if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
+ format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
+ /* simple case */
+ MEMCPY( destination, rgba, n * 4 * sizeof(GLubyte) );
+ }
+ else {
+ GLfloat red[MAX_WIDTH], green[MAX_WIDTH], blue[MAX_WIDTH];
+ GLfloat alpha[MAX_WIDTH], luminance[MAX_WIDTH];
+ GLfloat rscale = 1.0F / 255.0F;
+ GLfloat gscale = 1.0F / 255.0F;
+ GLfloat bscale = 1.0F / 255.0F;
+ GLfloat ascale = 1.0F / 255.0F;
+ GLuint i;
+
+ assert( n < MAX_WIDTH );
+
+ /* convert color components to floating point */
+ for (i=0;i<n;i++) {
+ red[i] = rgba[i][RCOMP] * rscale;
+ green[i] = rgba[i][GCOMP] * gscale;
+ blue[i] = rgba[i][BCOMP] * bscale;
+ alpha[i] = rgba[i][ACOMP] * ascale;
+ }
+
+ /*
+ * Apply scale, bias and lookup-tables if enabled.
+ */
+ if (applyTransferOps) {
+ if (ctx->Pixel.ScaleOrBiasRGBA) {
+ gl_scale_and_bias_color( ctx, n, red, green, blue, alpha );
+ }
+ if (ctx->Pixel.MapColorFlag) {
+ gl_map_color( ctx, n, red, green, blue, alpha );
+ }
+ }
+
+ if (format==GL_LUMINANCE || format==GL_LUMINANCE_ALPHA) {
+ for (i=0;i<n;i++) {
+ GLfloat sum = red[i] + green[i] + blue[i];
+ luminance[i] = CLAMP( sum, 0.0F, 1.0F );
+ }
+ }
+
+ /*
+ * Pack/store the pixels. Ugh! Lots of cases!!!
+ */
+ switch (type) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UBYTE(alpha[i]);
+ 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(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UBYTE(red[i]);
+ dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
+ dst[i*3+2] = FLOAT_TO_UBYTE(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(red[i]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(blue[i]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UBYTE(blue[i]);
+ dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
+ dst[i*3+2] = FLOAT_TO_UBYTE(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(blue[i]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(red[i]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UBYTE(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_UBYTE(blue[i]);
+ dst[i*4+2] = FLOAT_TO_UBYTE(green[i]);
+ dst[i*4+3] = FLOAT_TO_UBYTE(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ }
+ break;
+ case GL_BYTE:
+ {
+ GLbyte *dst = (GLbyte *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_BYTE(alpha[i]);
+ 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(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_BYTE(red[i]);
+ dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
+ dst[i*3+2] = FLOAT_TO_BYTE(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(red[i]);
+ dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
+ dst[i*4+2] = FLOAT_TO_BYTE(blue[i]);
+ dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_BYTE(blue[i]);
+ dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
+ dst[i*3+2] = FLOAT_TO_BYTE(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(blue[i]);
+ dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
+ dst[i*4+2] = FLOAT_TO_BYTE(red[i]);
+ dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
+ }
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_BYTE(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_BYTE(blue[i]);
+ dst[i*4+2] = FLOAT_TO_BYTE(green[i]);
+ dst[i*4+3] = FLOAT_TO_BYTE(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_USHORT(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_USHORT(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_USHORT(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_USHORT(alpha[i]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_USHORT(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = FLOAT_TO_USHORT(luminance[i]);
+ dst[i*2+1] = FLOAT_TO_USHORT(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_USHORT(red[i]);
+ dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
+ dst[i*3+2] = FLOAT_TO_USHORT(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_USHORT(red[i]);
+ dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
+ dst[i*4+2] = FLOAT_TO_USHORT(blue[i]);
+ dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_USHORT(blue[i]);
+ dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
+ dst[i*3+2] = FLOAT_TO_USHORT(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_USHORT(blue[i]);
+ dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
+ dst[i*4+2] = FLOAT_TO_USHORT(red[i]);
+ dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_USHORT(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_USHORT(blue[i]);
+ dst[i*4+2] = FLOAT_TO_USHORT(green[i]);
+ dst[i*4+3] = FLOAT_TO_USHORT(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ if (packing->SwapBytes) {
+ gl_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_SHORT(alpha[i]);
+ 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(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_SHORT(red[i]);
+ dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
+ dst[i*3+2] = FLOAT_TO_SHORT(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(red[i]);
+ dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
+ dst[i*4+2] = FLOAT_TO_SHORT(blue[i]);
+ dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_SHORT(blue[i]);
+ dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
+ dst[i*3+2] = FLOAT_TO_SHORT(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(blue[i]);
+ dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
+ dst[i*4+2] = FLOAT_TO_SHORT(red[i]);
+ dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
+ }
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_SHORT(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_SHORT(blue[i]);
+ dst[i*4+2] = FLOAT_TO_SHORT(green[i]);
+ dst[i*4+3] = FLOAT_TO_SHORT(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ if (packing->SwapBytes) {
+ gl_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_UINT(alpha[i]);
+ 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(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UINT(red[i]);
+ dst[i*3+1] = FLOAT_TO_UINT(green[i]);
+ dst[i*3+2] = FLOAT_TO_UINT(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(red[i]);
+ dst[i*4+1] = FLOAT_TO_UINT(green[i]);
+ dst[i*4+2] = FLOAT_TO_UINT(blue[i]);
+ dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_UINT(blue[i]);
+ dst[i*3+1] = FLOAT_TO_UINT(green[i]);
+ dst[i*3+2] = FLOAT_TO_UINT(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(blue[i]);
+ dst[i*4+1] = FLOAT_TO_UINT(green[i]);
+ dst[i*4+2] = FLOAT_TO_UINT(red[i]);
+ dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_UINT(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_UINT(blue[i]);
+ dst[i*4+2] = FLOAT_TO_UINT(green[i]);
+ dst[i*4+3] = FLOAT_TO_UINT(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ if (packing->SwapBytes) {
+ gl_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(red[i]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(green[i]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(blue[i]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = FLOAT_TO_INT(alpha[i]);
+ 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(alpha[i]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_INT(red[i]);
+ dst[i*3+1] = FLOAT_TO_INT(green[i]);
+ dst[i*3+2] = FLOAT_TO_INT(blue[i]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(red[i]);
+ dst[i*4+1] = FLOAT_TO_INT(green[i]);
+ dst[i*4+2] = FLOAT_TO_INT(blue[i]);
+ dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = FLOAT_TO_INT(blue[i]);
+ dst[i*3+1] = FLOAT_TO_INT(green[i]);
+ dst[i*3+2] = FLOAT_TO_INT(red[i]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(blue[i]);
+ dst[i*4+1] = FLOAT_TO_INT(green[i]);
+ dst[i*4+2] = FLOAT_TO_INT(red[i]);
+ dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = FLOAT_TO_INT(alpha[i]);
+ dst[i*4+1] = FLOAT_TO_INT(blue[i]);
+ dst[i*4+2] = FLOAT_TO_INT(green[i]);
+ dst[i*4+3] = FLOAT_TO_INT(red[i]);
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ if (packing->SwapBytes) {
+ gl_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) destination;
+ switch (format) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = red[i];
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = green[i];
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = blue[i];
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = alpha[i];
+ 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] = alpha[i];
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = red[i];
+ dst[i*3+1] = green[i];
+ dst[i*3+2] = blue[i];
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = red[i];
+ dst[i*4+1] = green[i];
+ dst[i*4+2] = blue[i];
+ dst[i*4+3] = alpha[i];
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = blue[i];
+ dst[i*3+1] = green[i];
+ dst[i*3+2] = red[i];
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = blue[i];
+ dst[i*4+1] = green[i];
+ dst[i*4+2] = red[i];
+ dst[i*4+3] = alpha[i];
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = alpha[i];
+ dst[i*4+1] = blue[i];
+ dst[i*4+2] = green[i];
+ dst[i*4+3] = red[i];
+ }
+ break;
+ default:
+ gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
+ }
+ if (packing->SwapBytes) {
+ gl_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_3_3_2:
+ if (format == GL_RGB) {
+ GLubyte *dst = (GLubyte *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 7.0F)) << 5)
+ | (((GLint) (green[i] * 7.0F)) << 2)
+ | (((GLint) (blue[i] * 3.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ if (format == GL_RGB) {
+ GLubyte *dst = (GLubyte *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 7.0F)) )
+ | (((GLint) (green[i] * 7.0F)) << 3)
+ | (((GLint) (blue[i] * 3.0F)) << 5);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
+ | (((GLint) (green[i] * 63.0F)) << 5)
+ | (((GLint) (blue[i] * 31.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 31.0F)) )
+ | (((GLint) (green[i] * 63.0F)) << 5)
+ | (((GLint) (blue[i] * 31.0F)) << 11);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 15.0F)) << 12)
+ | (((GLint) (green[i] * 15.0F)) << 8)
+ | (((GLint) (blue[i] * 15.0F)) << 4)
+ | (((GLint) (alpha[i] * 15.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 15.0F)) )
+ | (((GLint) (green[i] * 15.0F)) << 4)
+ | (((GLint) (blue[i] * 15.0F)) << 8)
+ | (((GLint) (alpha[i] * 15.0F)) << 12);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
+ | (((GLint) (green[i] * 31.0F)) << 6)
+ | (((GLint) (blue[i] * 31.0F)) << 1)
+ | (((GLint) (alpha[i] * 1.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ if (format == GL_RGB) {
+ GLushort *dst = (GLushort *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (red[i] * 31.0F)) )
+ | (((GLint) (green[i] * 31.0F)) << 5)
+ | (((GLint) (blue[i] * 31.0F)) << 10)
+ | (((GLint) (alpha[i] * 1.0F)) << 15);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ if (format == GL_RGBA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (red[i] * 255.0F)) << 24)
+ | (((GLuint) (green[i] * 255.0F)) << 16)
+ | (((GLuint) (blue[i] * 255.0F)) << 8)
+ | (((GLuint) (alpha[i] * 255.0F)) );
+ }
+ }
+ else if (format == GL_BGRA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (blue[i] * 255.0F)) << 24)
+ | (((GLuint) (green[i] * 255.0F)) << 16)
+ | (((GLuint) (red[i] * 255.0F)) << 8)
+ | (((GLuint) (alpha[i] * 255.0F)) );
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (alpha[i] * 255.0F)) << 24)
+ | (((GLuint) (blue[i] * 255.0F)) << 16)
+ | (((GLuint) (green[i] * 255.0F)) << 8)
+ | (((GLuint) (red[i] * 255.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ if (format == GL_RGBA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (red[i] * 255.0F)) )
+ | (((GLuint) (green[i] * 255.0F)) << 8)
+ | (((GLuint) (blue[i] * 255.0F)) << 16)
+ | (((GLuint) (alpha[i] * 255.0F)) << 24);
+ }
+ }
+ else if (format == GL_BGRA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (blue[i] * 255.0F)) )
+ | (((GLuint) (green[i] * 255.0F)) << 8)
+ | (((GLuint) (red[i] * 255.0F)) << 16)
+ | (((GLuint) (alpha[i] * 255.0F)) << 24);
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (alpha[i] * 255.0F)) )
+ | (((GLuint) (blue[i] * 255.0F)) << 8)
+ | (((GLuint) (green[i] * 255.0F)) << 16)
+ | (((GLuint) (red[i] * 255.0F)) << 24);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_10_10_10_2:
+ if (format == GL_RGBA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (red[i] * 1023.0F)) << 22)
+ | (((GLuint) (green[i] * 1023.0F)) << 12)
+ | (((GLuint) (blue[i] * 1023.0F)) << 2)
+ | (((GLuint) (alpha[i] * 3.0F)) );
+ }
+ }
+ else if (format == GL_BGRA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (blue[i] * 1023.0F)) << 22)
+ | (((GLuint) (green[i] * 1023.0F)) << 12)
+ | (((GLuint) (red[i] * 1023.0F)) << 2)
+ | (((GLuint) (alpha[i] * 3.0F)) );
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (alpha[i] * 1023.0F)) << 22)
+ | (((GLuint) (blue[i] * 1023.0F)) << 12)
+ | (((GLuint) (green[i] * 1023.0F)) << 2)
+ | (((GLuint) (red[i] * 3.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ if (format == GL_RGBA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (red[i] * 1023.0F)) )
+ | (((GLuint) (green[i] * 1023.0F)) << 10)
+ | (((GLuint) (blue[i] * 1023.0F)) << 20)
+ | (((GLuint) (alpha[i] * 3.0F)) << 30);
+ }
+ }
+ else if (format == GL_BGRA) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (blue[i] * 1023.0F)) )
+ | (((GLuint) (green[i] * 1023.0F)) << 10)
+ | (((GLuint) (red[i] * 1023.0F)) << 20)
+ | (((GLuint) (alpha[i] * 3.0F)) << 30);
+ }
+ }
+ else if (format == GL_ABGR_EXT) {
+ GLuint *dst = (GLuint *) destination;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLuint) (alpha[i] * 1023.0F)) )
+ | (((GLuint) (blue[i] * 1023.0F)) << 10)
+ | (((GLuint) (green[i] * 1023.0F)) << 20)
+ | (((GLuint) (red[i] * 3.0F)) << 30);
+ }
+ }
+ break;
+ default:
+ gl_problem( ctx, "bad type in gl_pack_rgba_span" );
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-20 22:25:24 +0000