--- /dev/null
+/* $Id: s_imaging.c,v 1.4 2001/03/19 02:28:59 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 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.
+ */
+
+/* KW: Moved these here to remove knowledge of swrast from core mesa.
+ * Should probably pull the entire software implementation of these
+ * extensions into either swrast or a sister module.
+ */
+
+#include "s_context.h"
+#include "s_span.h"
+
+void
+_swrast_CopyColorTable( GLcontext *ctx,
+ GLenum target, GLenum internalformat,
+ GLint x, GLint y, GLsizei width)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLchan data[MAX_WIDTH][4];
+
+ /* Select buffer to read from */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer );
+
+ if (width > MAX_WIDTH)
+ width = MAX_WIDTH;
+
+ /* read the data from framebuffer */
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data );
+
+ /* Restore reading from draw buffer (the default) */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+ ctx->Color.DriverDrawBuffer );
+
+ glColorTable(target, internalformat, width, GL_RGBA, GL_UNSIGNED_BYTE, data);
+}
+
+void
+_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
+ GLint x, GLint y, GLsizei width)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLchan data[MAX_WIDTH][4];
+
+ /* Select buffer to read from */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer );
+
+ if (width > MAX_WIDTH)
+ width = MAX_WIDTH;
+
+ /* read the data from framebuffer */
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data );
+
+ /* Restore reading from draw buffer (the default) */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+ ctx->Color.DriverDrawBuffer );
+
+ glColorSubTable(target, start, width, GL_RGBA, GL_UNSIGNED_BYTE, data);
+}
+
+
+void
+_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
+
+ RENDER_START( swrast, ctx );
+
+ /* read the data from framebuffer */
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y,
+ (GLchan (*)[4]) rgba );
+
+ RENDER_FINISH( swrast, ctx );
+
+ /* store as convolution filter */
+ glConvolutionFilter1D(target, internalFormat, width,
+ GL_RGBA, CHAN_TYPE, rgba);
+}
+
+
+void
+_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
+ GLenum internalFormat,
+ GLint x, GLint y, GLsizei width, GLsizei height)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_pixelstore_attrib packSave;
+ GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
+ GLint i;
+
+ RENDER_START(swrast,ctx);
+
+ /* read pixels from framebuffer */
+ for (i = 0; i < height; i++) {
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
+ (GLchan (*)[4]) rgba[i] );
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ /*
+ * HACK: save & restore context state so we can store this as a
+ * convolution filter via the GL api. Doesn't call any callbacks
+ * hanging off ctx->Unpack statechanges.
+ */
+
+ packSave = ctx->Unpack; /* save pixel packing params */
+
+ ctx->Unpack.Alignment = 1;
+ ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
+ ctx->Unpack.SkipPixels = 0;
+ ctx->Unpack.SkipRows = 0;
+ ctx->Unpack.ImageHeight = 0;
+ ctx->Unpack.SkipImages = 0;
+ ctx->Unpack.SwapBytes = GL_FALSE;
+ ctx->Unpack.LsbFirst = GL_FALSE;
+ ctx->NewState |= _NEW_PACKUNPACK;
+
+ glConvolutionFilter2D(target, internalFormat, width, height,
+ GL_RGBA, CHAN_TYPE, rgba);
+
+ ctx->Unpack = packSave; /* restore pixel packing params */
+ ctx->NewState |= _NEW_PACKUNPACK;
+}
--- /dev/null
+/* $Id: s_texstore.c,v 1.1 2001/03/19 02:28:59 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * Copyright (C) 1999-2001 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 "colormac.h"
+#include "context.h"
+#include "convolve.h"
+#include "image.h"
+#include "macros.h"
+#include "mem.h"
+#include "texformat.h"
+#include "teximage.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().
+ * Input: ctx - the context
+ * x, y - lower left corner
+ * width, height - size of region to read
+ * Return: pointer to block of GL_RGBA, GLchan data.
+ */
+static GLchan *
+read_color_image( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint stride, i;
+ GLchan *image, *dst;
+
+ image = (GLchan *) MALLOC(width * height * 4 * sizeof(GLchan));
+ if (!image)
+ return NULL;
+
+ /* Select buffer to read from */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer );
+
+ RENDER_START(swrast,ctx);
+
+ dst = image;
+ stride = width * 4;
+ for (i = 0; i < height; i++) {
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
+ (GLchan (*)[4]) dst );
+ dst += stride;
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ /* Read from draw buffer (the default) */
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+ ctx->Color.DriverDrawBuffer );
+
+ return image;
+}
+
+
+/*
+ * As above, but read data from depth buffer.
+ */
+static GLfloat *
+read_depth_image( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat *image, *dst;
+ GLint i;
+
+ image = (GLfloat *) MALLOC(width * height * sizeof(GLfloat));
+ if (!image)
+ return NULL;
+
+ RENDER_START(swrast,ctx);
+
+ dst = image;
+ for (i = 0; i < height; i++) {
+ _mesa_read_depth_span_float(ctx, width, x, y + i, dst);
+ dst += width;
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ return image;
+}
+
+
+
+static GLboolean
+is_depth_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16_SGIX:
+ case GL_DEPTH_COMPONENT24_SGIX:
+ case GL_DEPTH_COMPONENT32_SGIX:
+ 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, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage1D);
+
+ if (is_depth_format(internalFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *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_FLOAT, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_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_RGBA, CHAN_TYPE, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexImage2D().
+ */
+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, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage2D);
+
+ if (is_depth_format(internalFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *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_FLOAT, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_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_RGBA, CHAN_TYPE, image,
+ &_mesa_native_packing, texObj, texImage);
+ 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, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage1D);
+
+ if (is_depth_format(texImage->IntFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_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_COMPONENT, GL_FLOAT, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+ else {
+ GLchan *image = read_color_image(ctx, x, y, 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,
+ GL_RGBA, CHAN_TYPE, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+}
+
+
+/*
+ * Fallback for Driver.CopyTexSubImage2D().
+ */
+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, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage2D);
+
+ if (is_depth_format(texImage->IntFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexSubImage2D)(ctx, target, level,
+ xoffset, yoffset, width, height,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, 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,
+ GL_RGBA, CHAN_TYPE, image,
+ &_mesa_native_packing, texObj, texImage);
+ 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, texUnit, target, level);
+ ASSERT(texImage);
+
+ ASSERT(ctx->Driver.TexImage3D);
+
+ if (is_depth_format(texImage->IntFormat)) {
+ /* read depth image from framebuffer */
+ GLfloat *image = read_depth_image(ctx, x, y, width, height);
+ if (!image) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D");
+ return;
+ }
+
+ /* call glTexImage1D to redefine the texture */
+ (*ctx->Driver.TexSubImage3D)(ctx, target, level,
+ xoffset, yoffset, zoffset, width, height, 1,
+ GL_DEPTH_COMPONENT, GL_FLOAT, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+ else {
+ /* read RGBA image from framebuffer */
+ GLchan *image = read_color_image(ctx, x, y, 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,
+ GL_RGBA, CHAN_TYPE, image,
+ &_mesa_native_packing, texObj, texImage);
+ FREE(image);
+ }
+}
+
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