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-rw-r--r--src/mesa/main/image.c1518
1 files changed, 337 insertions, 1181 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 582fa5c147..87a5c4800a 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,8 +1,8 @@
-/* $Id: image.c,v 1.13 1999/11/08 07:36:44 brianp Exp $ */
+/* $Id: image.c,v 1.14 1999/11/11 01:22:27 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
+ * Version: 3.3
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
@@ -25,20 +25,14 @@
*/
-
#ifdef PC_HEADER
#include "all.h"
#else
-#ifndef XFree86Server
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-#else
-#include "GL/xf86glx.h"
-#endif
+#include "glheader.h"
#include "context.h"
#include "image.h"
#include "macros.h"
+#include "mem.h"
#include "mmath.h"
#include "pixel.h"
#include "types.h"
@@ -47,6 +41,26 @@
/*
+ * These are the image packing parameters for Mesa's internal images.
+ * That is, _mesa_unpack_image() returns image data in this format.
+ * When we execute image commands (glDrawPixels, glTexImage, etc)
+ * from within display lists we have to be sure to set the current
+ * unpacking params to these values!
+ */
+struct gl_pixelstore_attrib _mesa_native_packing = {
+ 1, /* Alignment */
+ 0, /* RowLength */
+ 0, /* SkipPixels */
+ 0, /* SkipRows */
+ 0, /* ImageHeight */
+ 0, /* SkipImages */
+ GL_FALSE, /* SwapBytes */
+ GL_FALSE /* LsbFirst */
+};
+
+
+
+/*
* Flip the 8 bits in each byte of the given array.
*/
void gl_flip_bytes( GLubyte *p, GLuint n )
@@ -207,7 +221,6 @@ GLint gl_components_in_format( GLenum format )
case GL_BLUE:
case GL_ALPHA:
case GL_LUMINANCE:
- case GL_INTENSITY:
return 1;
case GL_LUMINANCE_ALPHA:
return 2;
@@ -477,441 +490,6 @@ GLvoid *gl_pixel_addr_in_image( const struct gl_pixelstore_attrib *packing,
/*
- * Allocate a new gl_image. All fields are initialized to zero.
- */
-static struct gl_image *alloc_image( void )
-{
- return CALLOC_STRUCT(gl_image);
-}
-
-
-
-/*
- * 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 if (!gl_is_legal_format_and_type(image->Format, image->Type)) {
- 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;
- GLboolean errorType;
-
- errorType = type != GL_BYTE &&
- type != GL_UNSIGNED_BYTE &&
- type != GL_SHORT &&
- type != GL_UNSIGNED_SHORT &&
- type != GL_INT &&
- type != GL_UNSIGNED_INT &&
- type != GL_FLOAT;
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = 1;
- image->Format = GL_DEPTH_COMPONENT;
- if (errorType) {
- image->Type = type;
- image->Data = NULL;
- }
- 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;
- }
-
- if (errorType)
- return image;
-
- 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;
- GLboolean errorType;
-
- assert(sizeof(GLstencil) == sizeof(GLubyte));
-
- errorType = type != GL_BYTE &&
- type != GL_UNSIGNED_BYTE &&
- type != GL_SHORT &&
- type != GL_UNSIGNED_SHORT &&
- type != GL_INT &&
- type != GL_UNSIGNED_INT &&
- type != GL_FLOAT &&
- type != GL_BITMAP;
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = 1;
- image->Format = GL_STENCIL_INDEX;
- if (errorType) {
- image->Type = type;
- image->Data = NULL;
- }
- else {
- image->Type = GL_UNSIGNED_BYTE;
- image->Data = MALLOC( width * height * sizeof(GLubyte));
- }
- image->RefCount = 0;
- if (!image->Data)
- return image;
- }
- else {
- return NULL;
- }
-
- if (errorType)
- return image; /* error will be generated later */
-
- 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( 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.
*/
@@ -963,701 +541,6 @@ void gl_pack_polygon_stipple( const GLcontext *ctx,
/*
- * Unpack an RGBA or CI image and store it as unsigned bytes
- */
-static struct gl_image *
-unpack_ubyte_image( 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( 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( 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.
@@ -1678,14 +561,14 @@ void gl_pack_rgba_span( const GLcontext *ctx,
const struct gl_pixelstore_attrib *packing,
GLboolean applyTransferOps )
{
+ applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA || ctx->Pixel.MapColorFlag);
+
/* Test for optimized case first */
- if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
- format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
+ if (!applyTransferOps && format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
/* common simple case */
MEMCPY( destination, rgba, n * 4 * sizeof(GLubyte) );
}
- else if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
- format == GL_RGB && type == GL_UNSIGNED_BYTE) {
+ else if (!applyTransferOps && format == GL_RGB && type == GL_UNSIGNED_BYTE) {
/* common simple case */
GLint i;
GLubyte *dest = (GLubyte *) destination;
@@ -1697,6 +580,7 @@ void gl_pack_rgba_span( const GLcontext *ctx,
}
}
else {
+ /* general solution */
GLfloat red[MAX_WIDTH], green[MAX_WIDTH], blue[MAX_WIDTH];
GLfloat alpha[MAX_WIDTH], luminance[MAX_WIDTH];
const GLfloat rscale = 1.0F / 255.0F;
@@ -2470,11 +1354,6 @@ void gl_pack_rgba_span( const GLcontext *ctx,
}
-
-/*
- * New (3.3) functions
- */
-
#define SWAP2BYTE(VALUE) \
{ \
GLubyte *bytes = (GLubyte *) &(VALUE); \
@@ -2679,16 +1558,6 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
GLint stride;
GLint rComp, bComp, gComp, aComp;
- if (0)
- {
- int i;
- for (i = 0; i<n;i++) {
- rgba[i][0] = rgba[i][1] = rgba[i][2] = rgba[i][3] = 0;
- }
- return;
- }
-
-
ASSERT(srcFormat == GL_RED ||
srcFormat == GL_GREEN ||
srcFormat == GL_BLUE ||
@@ -2710,17 +1579,10 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
srcType == GL_INT ||
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);
+ srcType == GL_UNSIGNED_INT_10_10_10_2);
switch (srcFormat) {
case GL_RED:
@@ -2810,10 +1672,6 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
return;
}
- assert(redIndex >= -1 && redIndex <= 4);
- assert(greenIndex >= -1 && greenIndex <= 4);
- assert(blueIndex >= -1 && blueIndex <= 4);
- assert(alphaIndex >= -1 && alphaIndex <= 4);
#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
if ((INDEX) < 0) { \
@@ -3228,22 +2086,16 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
srcType == GL_INT ||
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);
+ srcType == GL_UNSIGNED_INT_10_10_10_2);
/* this is intended for RGBA mode */
- ASSERT(ctx->Visual->RGBAflag);
+ assert(ctx->Visual->RGBAflag);
applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA ||
+ ctx->Pixel.MapColorFlag ||
ctx->Pixel.MapColorFlag);
/* Try simple cases first */
@@ -3426,6 +2278,7 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
/* Now return the GLubyte data in the requested dstFormat */
+
if (dstRedIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
@@ -3589,6 +2442,206 @@ _mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
/*
+ * Unpack a row of stencil data from a client buffer according to
+ * the pixel unpacking parameters. Apply pixel transfer ops if enabled
+ * and applyTransferOps is true.
+ * This is (or will be) used by glDrawPixels
+ *
+ * Args: ctx - the context
+ * n - number of pixels
+ * dstType - destination datatype
+ * dest - destination array
+ * srcType - source pixel type
+ * source - source data pointer
+ * unpacking - pixel unpacking parameters
+ * applyTransferOps - 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 *unpacking,
+ GLboolean applyTransferOps )
+{
+ 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_FLOAT);
+
+ ASSERT(dstType == GL_UNSIGNED_BYTE ||
+ dstType == GL_UNSIGNED_SHORT ||
+ dstType == GL_UNSIGNED_INT);
+
+ applyTransferOps &= (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset || ctx->Pixel.MapColorFlag);
+
+ /*
+ * Try simple cases first
+ */
+ if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE
+ && dstType == GL_UNSIGNED_BYTE) {
+ MEMCPY(dest, source, n * sizeof(GLubyte));
+ }
+ else if (!applyTransferOps && srcType == GL_UNSIGNED_INT
+ && dstType == GL_UNSIGNED_INT && !unpacking->SwapBytes) {
+ MEMCPY(dest, source, n * sizeof(GLuint));
+ }
+ else {
+ /*
+ * general solution
+ */
+ GLuint indexes[MAX_WIDTH];
+ assert(n <= MAX_WIDTH);
+
+ extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
+ unpacking);
+
+ if (applyTransferOps) {
+ if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
+ /* shift and offset indexes */
+ gl_shift_and_offset_ci(ctx, n, indexes);
+ }
+
+ if (ctx->Pixel.MapStencilFlag) {
+ /* Apply stencil lookup table */
+ GLuint mask = ctx->Pixel.MapStoSsize - 1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ indexes[i] = ctx->Pixel.MapStoS[ indexes[i] & mask ];
+ }
+ }
+ }
+
+ /* convert to dest type */
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLubyte) (indexes[i] & 0xff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLushort) (indexes[i] & 0xffff);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ MEMCPY(dest, indexes, n * sizeof(GLuint));
+ break;
+ default:
+ gl_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
+ }
+ }
+}
+
+
+
+void
+_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n, GLdepth *dest,
+ GLenum srcType, const GLvoid *source,
+ const struct gl_pixelstore_attrib *unpacking,
+ GLboolean applyTransferOps )
+{
+ GLfloat *depth = MALLOC(n * sizeof(GLfloat));
+ if (!depth)
+ return;
+
+ switch (srcType) {
+ case GL_BYTE:
+ {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ for (i = 0; i < n; i++) {
+ depth[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++) {
+ depth[i] = UBYTE_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLuint i;
+ const GLshort *src = (const GLshort *) source;
+ for (i = 0; i < n; i++) {
+ depth[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++) {
+ depth[i] = USHORT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLuint i;
+ const GLint *src = (const GLint *) source;
+ for (i = 0; i < n; i++) {
+ depth[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++) {
+ depth[i] = UINT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_FLOAT:
+ MEMCPY(depth, source, n * sizeof(GLfloat));
+ break;
+ default:
+ gl_problem(NULL, "bad type in _mesa_unpack_depth_span()");
+ return;
+ }
+
+
+ /* apply depth scale and bias */
+ if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ depth[i] = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
+ }
+ }
+
+ /* clamp depth values to [0,1] and convert from floats to integers */
+ {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dest[i] = (GLdepth) (CLAMP(depth[i], 0.0F, 1.0F) * DEPTH_SCALE);
+ }
+ }
+
+ FREE(depth);
+}
+
+
+
+/*
* Unpack image data. Apply byteswapping, byte flipping (bitmap).
* Return all image data in a contiguous block.
*/
@@ -3656,3 +2709,106 @@ _mesa_unpack_image( GLsizei width, GLsizei height, GLsizei depth,
return destBuffer;
}
}
+
+
+/*
+ * Unpack bitmap data. Resulting data will be in most-significant-bit-first
+ * order with row alignment = 1 byte.
+ */
+GLvoid *
+_mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ GLint bytes, row, width_in_bytes;
+ GLubyte *buffer, *dst;
+
+ if (!pixels)
+ return NULL;
+
+ /* Alloc dest storage */
+ bytes = ((width + 7) / 8 * height);
+ buffer = (GLubyte *) MALLOC( bytes );
+ if (!buffer)
+ return NULL;
+
+
+ width_in_bytes = CEILING( width, 8 );
+ dst = buffer;
+ for (row = 0; row < height; row++) {
+ GLubyte *src = gl_pixel_addr_in_image( packing, pixels, width, height,
+ GL_COLOR_INDEX, GL_BITMAP,
+ 0, row, 0 );
+ if (!src) {
+ FREE(buffer);
+ return NULL;
+ }
+
+ if (packing->SkipPixels == 0) {
+ MEMCPY( dst, src, width_in_bytes );
+ if (packing->LsbFirst) {
+ gl_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;
+ 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;
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-11 02:02:22 +0000