+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * Authors:
- * Brian Paul
- */
-
-
-/*
- * The functions in this file are mostly related to software texture fallbacks.
- * This includes texture image transfer/packing and texel fetching.
- * Hardware drivers will likely override most of this.
- */
-
-
-
-#include "main/glheader.h"
-#include "main/imports.h"
-#include "main/colormac.h"
-#include "main/context.h"
-#include "main/convolve.h"
-#include "main/image.h"
-#include "main/macros.h"
-#include "main/mipmap.h"
-#include "main/texformat.h"
-#include "main/teximage.h"
-#include "main/texstore.h"
-
-#include "s_context.h"
-#include "s_depth.h"
-#include "s_span.h"
-
-
-/**
- * Read an RGBA image from the frame buffer.
- * This is used by glCopyTex[Sub]Image[12]D().
- * \param x window source x
- * \param y window source y
- * \param width image width
- * \param height image height
- * \param type datatype for returned GL_RGBA image
- * \return pointer to image
- */
-static GLvoid *
-read_color_image( GLcontext *ctx, GLint x, GLint y, GLenum type,
- GLsizei width, GLsizei height )
-{
- struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- const GLint pixelSize = _mesa_bytes_per_pixel(GL_RGBA, type);
- const GLint stride = width * pixelSize;
- GLint row;
- GLubyte *image, *dst;
-
- image = (GLubyte *) _mesa_malloc(width * height * pixelSize);
- if (!image)
- return NULL;
-
- swrast_render_start(ctx);
-
- dst = image;
- for (row = 0; row < height; row++) {
- _swrast_read_rgba_span(ctx, rb, width, x, y + row, type, dst);
- dst += stride;
- }
-
- swrast_render_finish(ctx);
-
- return image;
-}
-
-
-/**
- * As above, but read data from depth buffer. Returned as GLuints.
- * \sa read_color_image
- */
-static GLuint *
-read_depth_image( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height )
-{
- struct gl_renderbuffer *rb = ctx->ReadBuffer->_DepthBuffer;
- GLuint *image, *dst;
- GLint i;
-
- image = (GLuint *) _mesa_malloc(width * height * sizeof(GLuint));
- if (!image)
- return NULL;
-
- swrast_render_start(ctx);
-
- dst = image;
- for (i = 0; i < height; i++) {
- _swrast_read_depth_span_uint(ctx, rb, width, x, y + i, dst);
- dst += width;
- }
-
- swrast_render_finish(ctx);
-
- return image;
-}
-
-
-/**
- * As above, but read data from depth+stencil buffers.
- */
-static GLuint *
-read_depth_stencil_image(GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height)
-{
- struct gl_renderbuffer *depthRb = ctx->ReadBuffer->_DepthBuffer;
- struct gl_renderbuffer *stencilRb = ctx->ReadBuffer->_StencilBuffer;
- GLuint *image, *dst;
- GLint i;
-
- ASSERT(depthRb);
- ASSERT(stencilRb);
-
- image = (GLuint *) _mesa_malloc(width * height * sizeof(GLuint));
- if (!image)
- return NULL;
-
- swrast_render_start(ctx);
-
- /* read from depth buffer */
- dst = image;
- if (depthRb->DataType == GL_UNSIGNED_INT) {
- for (i = 0; i < height; i++) {
- _swrast_get_row(ctx, depthRb, width, x, y + i, dst, sizeof(GLuint));
- dst += width;
- }
- }
- else {
- GLushort z16[MAX_WIDTH];
- ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT);
- for (i = 0; i < height; i++) {
- GLint j;
- _swrast_get_row(ctx, depthRb, width, x, y + i, z16, sizeof(GLushort));
- /* convert GLushorts to GLuints */
- for (j = 0; j < width; j++) {
- dst[j] = z16[j];
- }
- dst += width;
- }
- }
-
- /* put depth values into bits 0xffffff00 */
- if (ctx->ReadBuffer->Visual.depthBits == 24) {
- GLint j;
- for (j = 0; j < width * height; j++) {
- image[j] <<= 8;
- }
- }
- else if (ctx->ReadBuffer->Visual.depthBits == 16) {
- GLint j;
- for (j = 0; j < width * height; j++) {
- image[j] = (image[j] << 16) | (image[j] & 0xff00);
- }
- }
- else {
- /* this handles arbitrary depthBits >= 12 */
- const GLint rShift = ctx->ReadBuffer->Visual.depthBits;
- const GLint lShift = 32 - rShift;
- GLint j;
- for (j = 0; j < width * height; j++) {
- GLuint z = (image[j] << lShift);
- image[j] = z | (z >> rShift);
- }
- }
-
- /* read stencil values and interleave into image array */
- dst = image;
- for (i = 0; i < height; i++) {
- GLstencil stencil[MAX_WIDTH];
- GLint j;
- ASSERT(8 * sizeof(GLstencil) == stencilRb->StencilBits);
- _swrast_get_row(ctx, stencilRb, width, x, y + i,
- stencil, sizeof(GLstencil));
- for (j = 0; j < width; j++) {
- dst[j] = (dst[j] & 0xffffff00) | (stencil[j] & 0xff);
- }
- dst += width;
- }
-
- swrast_render_finish(ctx);
-
- return image;
-}
-
-
-static GLboolean
-is_depth_format(GLenum format)
-{
- switch (format) {
- case GL_DEPTH_COMPONENT:
- case GL_DEPTH_COMPONENT16:
- case GL_DEPTH_COMPONENT24:
- case GL_DEPTH_COMPONENT32:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-static GLboolean
-is_depth_stencil_format(GLenum format)
-{
- switch (format) {
- case GL_DEPTH_STENCIL_EXT:
- case GL_DEPTH24_STENCIL8_EXT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/*
- * Fallback for Driver.CopyTexImage1D().
- */
-void
-_swrast_copy_teximage1d( GLcontext *ctx, GLenum target, GLint level,
- GLenum internalFormat,
- GLint x, GLint y, GLsizei width, GLint border )
-{
- struct gl_texture_unit *texUnit;
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
-
- texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- texObj = _mesa_select_tex_object(ctx, texUnit, target);
- ASSERT(texObj);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- ASSERT(texImage);
-
- ASSERT(ctx->Driver.TexImage1D);
-
- if (is_depth_format(internalFormat)) {
- /* read depth image from framebuffer */
- GLuint *image = read_depth_image(ctx, x, y, width, 1);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
- return;
- }
- /* call glTexImage1D to redefine the texture */
- ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
- width, border,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else if (is_depth_stencil_format(internalFormat)) {
- /* read depth/stencil image from framebuffer */
- GLuint *image = read_depth_stencil_image(ctx, x, y, width, 1);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
- return;
- }
- /* call glTexImage1D to redefine the texture */
- ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
- width, border,
- GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT,
- image, &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else {
- /* read RGBA image from framebuffer */
- const GLenum format = GL_RGBA;
- const GLenum type = ctx->ReadBuffer->_ColorReadBuffer->DataType;
- GLvoid *image = read_color_image(ctx, x, y, type, width, 1);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
- return;
- }
- /* call glTexImage1D to redefine the texture */
- ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
- width, border, format, type, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
-}
-
-
-/**
- * Fallback for Driver.CopyTexImage2D().
- *
- * We implement CopyTexImage by reading the image from the framebuffer
- * then passing it to the ctx->Driver.TexImage2D() function.
- *
- * Device drivers should try to implement direct framebuffer->texture copies.
- */
-void
-_swrast_copy_teximage2d( GLcontext *ctx, GLenum target, GLint level,
- GLenum internalFormat,
- GLint x, GLint y, GLsizei width, GLsizei height,
- GLint border )
-{
- struct gl_texture_unit *texUnit;
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
-
- texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- texObj = _mesa_select_tex_object(ctx, texUnit, target);
- ASSERT(texObj);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- ASSERT(texImage);
-
- ASSERT(ctx->Driver.TexImage2D);
-
- if (is_depth_format(internalFormat)) {
- /* read depth image from framebuffer */
- GLuint *image = read_depth_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
- return;
- }
- /* call glTexImage2D to redefine the texture */
- ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
- width, height, border,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else if (is_depth_stencil_format(internalFormat)) {
- GLuint *image = read_depth_stencil_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
- return;
- }
- /* call glTexImage2D to redefine the texture */
- ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
- width, height, border,
- GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT,
- image, &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else {
- /* read RGBA image from framebuffer */
- const GLenum format = GL_RGBA;
- const GLenum type = ctx->ReadBuffer->_ColorReadBuffer->DataType;
- GLvoid *image = read_color_image(ctx, x, y, type, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
- return;
- }
- /* call glTexImage2D to redefine the texture */
- ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
- width, height, border, format, type, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
-}
-
-
-/*
- * Fallback for Driver.CopyTexSubImage1D().
- */
-void
-_swrast_copy_texsubimage1d( GLcontext *ctx, GLenum target, GLint level,
- GLint xoffset, GLint x, GLint y, GLsizei width )
-{
- struct gl_texture_unit *texUnit;
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
-
- texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- texObj = _mesa_select_tex_object(ctx, texUnit, target);
- ASSERT(texObj);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- ASSERT(texImage);
-
- ASSERT(ctx->Driver.TexImage1D);
-
- if (texImage->_BaseFormat == GL_DEPTH_COMPONENT) {
- /* read depth image from framebuffer */
- GLuint *image = read_depth_image(ctx, x, y, width, 1);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D");
- return;
- }
-
- /* call glTexSubImage1D to redefine the texture */
- ctx->Driver.TexSubImage1D(ctx, target, level, xoffset, width,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else if (texImage->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
- /* read depth/stencil image from framebuffer */
- GLuint *image = read_depth_stencil_image(ctx, x, y, width, 1);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D");
- return;
- }
- /* call glTexImage1D to redefine the texture */
- ctx->Driver.TexSubImage1D(ctx, target, level, xoffset, width,
- GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT,
- image, &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else {
- /* read RGBA image from framebuffer */
- const GLenum format = GL_RGBA;
- const GLenum type = ctx->ReadBuffer->_ColorReadBuffer->DataType;
- GLvoid *image = read_color_image(ctx, x, y, type, width, 1);
- if (!image) {
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D" );
- return;
- }
- /* now call glTexSubImage1D to do the real work */
- ctx->Driver.TexSubImage1D(ctx, target, level, xoffset, width,
- format, type, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
-}
-
-
-/**
- * Fallback for Driver.CopyTexSubImage2D().
- *
- * Read the image from the framebuffer then hand it
- * off to ctx->Driver.TexSubImage2D().
- */
-void
-_swrast_copy_texsubimage2d( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset,
- GLint x, GLint y, GLsizei width, GLsizei height )
-{
- struct gl_texture_unit *texUnit;
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
-
- texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- texObj = _mesa_select_tex_object(ctx, texUnit, target);
- ASSERT(texObj);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- ASSERT(texImage);
-
- ASSERT(ctx->Driver.TexImage2D);
-
- if (texImage->_BaseFormat == GL_DEPTH_COMPONENT) {
- /* read depth image from framebuffer */
- GLuint *image = read_depth_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D");
- return;
- }
- /* call glTexImage2D to redefine the texture */
- ctx->Driver.TexSubImage2D(ctx, target, level,
- xoffset, yoffset, width, height,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else if (texImage->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
- /* read depth/stencil image from framebuffer */
- GLuint *image = read_depth_stencil_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D");
- return;
- }
- /* call glTexImage2D to redefine the texture */
- ctx->Driver.TexSubImage2D(ctx, target, level,
- xoffset, yoffset, width, height,
- GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT,
- image, &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else {
- /* read RGBA image from framebuffer */
- const GLenum format = GL_RGBA;
- const GLenum type = ctx->ReadBuffer->_ColorReadBuffer->DataType;
- GLvoid *image = read_color_image(ctx, x, y, type, width, height);
- if (!image) {
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
- return;
- }
- /* now call glTexSubImage2D to do the real work */
- ctx->Driver.TexSubImage2D(ctx, target, level,
- xoffset, yoffset, width, height,
- format, type, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
-}
-
-
-/*
- * Fallback for Driver.CopyTexSubImage3D().
- */
-void
-_swrast_copy_texsubimage3d( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset, GLint zoffset,
- GLint x, GLint y, GLsizei width, GLsizei height )
-{
- struct gl_texture_unit *texUnit;
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
-
- texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- texObj = _mesa_select_tex_object(ctx, texUnit, target);
- ASSERT(texObj);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- ASSERT(texImage);
-
- ASSERT(ctx->Driver.TexImage3D);
-
- if (texImage->_BaseFormat == GL_DEPTH_COMPONENT) {
- /* read depth image from framebuffer */
- GLuint *image = read_depth_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D");
- return;
- }
- /* call glTexImage3D to redefine the texture */
- ctx->Driver.TexSubImage3D(ctx, target, level,
- xoffset, yoffset, zoffset, width, height, 1,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else if (texImage->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
- /* read depth/stencil image from framebuffer */
- GLuint *image = read_depth_stencil_image(ctx, x, y, width, height);
- if (!image) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D");
- return;
- }
- /* call glTexImage3D to redefine the texture */
- ctx->Driver.TexSubImage3D(ctx, target, level,
- xoffset, yoffset, zoffset, width, height, 1,
- GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT,
- image, &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
- else {
- /* read RGBA image from framebuffer */
- const GLenum format = GL_RGBA;
- const GLenum type = ctx->ReadBuffer->_ColorReadBuffer->DataType;
- GLvoid *image = read_color_image(ctx, x, y, type, width, height);
- if (!image) {
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D" );
- return;
- }
- /* now call glTexSubImage3D to do the real work */
- ctx->Driver.TexSubImage3D(ctx, target, level,
- xoffset, yoffset, zoffset, width, height, 1,
- format, type, image,
- &ctx->DefaultPacking, texObj, texImage);
- _mesa_free(image);
- }
-}
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