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-rw-r--r--mesalib/src/mesa/swrast/s_texstore.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/mesalib/src/mesa/swrast/s_texstore.c b/mesalib/src/mesa/swrast/s_texstore.c
new file mode 100644
index 000000000..f9ff9ad6a
--- /dev/null
+++ b/mesalib/src/mesa/swrast/s_texstore.c
@@ -0,0 +1,601 @@
+/*
+ * 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);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ ctx->Driver.GenerateMipmap(ctx, target, texObj);
+ }
+}
+
+
+/**
+ * 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);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ ctx->Driver.GenerateMipmap(ctx, target, texObj);
+ }
+}
+
+
+/*
+ * 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);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ ctx->Driver.GenerateMipmap(ctx, target, texObj);
+ }
+}
+
+
+/**
+ * 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);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ ctx->Driver.GenerateMipmap(ctx, target, texObj);
+ }
+}
+
+
+/*
+ * 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);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ ctx->Driver.GenerateMipmap(ctx, target, texObj);
+ }
+}
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