New files

1 files changed, 405 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_texstore.c b/src/mesa/swrast/s_texstore.c
new file mode 100644
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--- /dev/null
+++ b/src/mesa/swrast/s_texstore.c
@@ -0,0 +1,405 @@
+/* $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);
+   }
+}
+