Added driver hooks for GetTexImage() and GetCompressedTexImage().

Added fallback _mesa_get_[compressed]_teximage() routines to texstore.c

4 files changed, 225 insertions, 173 deletions

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 23ec4587aaf..2b1131bc414 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -157,10 +157,9 @@ struct dd_function_table {
     * This function must respect all rasterization state, glPixelTransfer(),
     * glPixelZoom(), etc.
     */
-   void (*CopyPixels)( GLcontext *ctx,
-                            GLint srcx, GLint srcy,
-                            GLsizei width, GLsizei height,
-                            GLint dstx, GLint dsty, GLenum type );
+   void (*CopyPixels)( GLcontext *ctx, GLint srcx, GLint srcy,
+                       GLsizei width, GLsizei height,
+                       GLint dstx, GLint dsty, GLenum type );
 
    /**
     * This is called by glBitmap().  
@@ -298,6 +297,14 @@ struct dd_function_table {
                           struct gl_texture_image *texImage );
 
    /**
+    * Called by glGetTexImage().
+    */
+   void (*GetTexImage)( GLcontext *ctx, GLenum target, GLint level,
+                        GLenum format, GLenum type, GLvoid *pixels,
+                        const struct gl_texture_object *texObj,
+                        const struct gl_texture_image *texImage );
+
+   /**
     * Called by glCopyTexImage1D().
     * 
     * Drivers should use a fallback routine from texstore.c if needed.
@@ -454,6 +461,15 @@ struct dd_function_table {
                                    struct gl_texture_object *texObj,
                                    struct gl_texture_image *texImage);
 
+
+   /**
+    * Called by glGetCompressedTexImage.
+    */
+   void (*GetCompressedTexImage)(GLcontext *ctx, GLenum target, GLint level,
+                                 GLvoid *img,
+                                 const struct gl_texture_object *texObj,
+                                 const struct gl_texture_image *texImage);
+
    /**
     * Called to query number of bytes of storage needed to store the
     * specified compressed texture.
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 127e9bf5693..a98771311d2 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1902,7 +1902,6 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
    const struct gl_texture_object *texObj;
    const struct gl_texture_image *texImage;
    GLint maxLevels = 0;
-   GLuint dimensions;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
@@ -1979,127 +1978,9 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
       return;
    }
 
-   dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
-
-   /* XXX - someday the rest of this function should be moved into a
-    * fallback routine called via ctx->Driver.GetTexImage()
-    */
-
-   if (ctx->Pack.BufferObj->Name) {
-      /* pack texture image into a PBO */
-      GLubyte *buf;
-      if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
-                                     texImage->Height, texImage->Depth,
-                                     format, type, pixels)) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetTexImage(invalid PBO access)");
-         return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                                              GL_WRITE_ONLY_ARB,
-                                              ctx->Pack.BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION,"glGetTexImage(PBO is mapped)");
-         return;
-      }
-      pixels = ADD_POINTERS(buf, pixels);
-   }
-   else if (!pixels) {
-      /* not an error */
-      return;
-   }
-
-   /*
-    * XXX Move this code into a new driver fall-back function
-    */
-   {
-      const GLint width = texImage->Width;
-      const GLint height = texImage->Height;
-      const GLint depth = texImage->Depth;
-      GLint img, row;
-      for (img = 0; img < depth; img++) {
-         for (row = 0; row < height; row++) {
-            /* compute destination address in client memory */
-            GLvoid *dest = _mesa_image_address( dimensions, &ctx->Pack, pixels,
-                                                width, height, format, type,
-                                                img, row, 0);
-            assert(dest);
-
-            if (format == GL_COLOR_INDEX) {
-               GLuint indexRow[MAX_WIDTH];
-               GLint col;
-               /* Can't use FetchTexel here because that returns RGBA */
-               if (texImage->TexFormat->IndexBits == 8) {
-                  const GLubyte *src = (const GLubyte *) texImage->Data;
-                  for (col = 0; col < width; col++) {
-                     indexRow[col] = src[texImage->Width *
-                                        (img * texImage->Height + row) + col];
-                  }
-               }
-               else if (texImage->TexFormat->IndexBits == 16) {
-                  const GLushort *src = (const GLushort *) texImage->Data;
-                  for (col = 0; col < width; col++) {
-                     indexRow[col] = src[texImage->Width *
-                                        (img * texImage->Height + row) + col];
-                  }
-               }
-               else {
-                  _mesa_problem(ctx,
-                                "Color index problem in _mesa_GetTexImage");
-               }
-               _mesa_pack_index_span(ctx, width, type, dest,
-                                     indexRow, &ctx->Pack,
-                                     0 /* no image transfer */);
-            }
-            else if (format == GL_DEPTH_COMPONENT) {
-               GLfloat depthRow[MAX_WIDTH];
-               GLint col;
-               for (col = 0; col < width; col++) {
-                  (*texImage->FetchTexelf)(texImage, col, row, img,
-                                           depthRow + col);
-               }
-               _mesa_pack_depth_span(ctx, width, dest, type,
-                                     depthRow, &ctx->Pack);
-            }
-            else if (format == GL_YCBCR_MESA) {
-               /* No pixel transfer */
-               const GLint rowstride = texImage->RowStride;
-               MEMCPY(dest,
-                      (const GLushort *) texImage->Data + row * rowstride,
-                      width * sizeof(GLushort));
-               /* check for byte swapping */
-               if ((texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR
-                    && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
-                   (texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV
-                    && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
-                  if (!ctx->Pack.SwapBytes)
-                     _mesa_swap2((GLushort *) dest, width);
-               }
-               else if (ctx->Pack.SwapBytes) {
-                  _mesa_swap2((GLushort *) dest, width);
-               }
-            }
-            else {
-               /* general case:  convert row to RGBA format */
-               GLfloat rgba[MAX_WIDTH][4];
-               GLint col;
-               for (col = 0; col < width; col++) {
-                  (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
-               }
-               _mesa_pack_rgba_span_float(ctx, width,
-                                          (const GLfloat (*)[4]) rgba,
-                                          format, type, dest, &ctx->Pack,
-                                          0 /* no image transfer */);
-            } /* format */
-         } /* row */
-      } /* img */
-   }
-
-   if (ctx->Pack.BufferObj->Name) {
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                              ctx->Pack.BufferObj);
-   }
+   /* typically, this will call _mesa_get_teximage() */
+   ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,
+                           texObj, texImage);
 }
 
 
@@ -3394,40 +3275,6 @@ _mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
       return;
    }
 
-   /* XXX - someday the rest of this function should be moved into a
-    * fallback routine called via ctx->Driver.GetCompressedTexImage()
-    */
- 
-   if (ctx->Pack.BufferObj->Name) {
-      /* pack texture image into a PBO */
-      GLubyte *buf;
-      if ((const GLubyte *) img + texImage->CompressedSize >
-          (const GLubyte *) ctx->Pack.BufferObj->Size) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetCompressedTexImage(invalid PBO access)");
-         return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                                              GL_WRITE_ONLY_ARB,
-                                              ctx->Pack.BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetCompressedTexImage(PBO is mapped)");
-         return;
-      }
-      img = ADD_POINTERS(buf, img);
-   }
-   else if (!img) {
-      /* not an error */
-      return;
-   }
-
-   /* just memcpy, no pixelstore or pixel transfer */
-   MEMCPY(img, texImage->Data, texImage->CompressedSize);
-
-   if (ctx->Pack.BufferObj->Name) {
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                              ctx->Pack.BufferObj);
-   }
+   /* this typically calls _mesa_get_compressed_teximage() */
+   ctx->Driver.GetCompressedTexImage(ctx, target, level, img, texObj,texImage);
 }
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index dd1fcef0596..7356910132d 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -3597,3 +3597,177 @@ _mesa_upscale_teximage2d (GLsizei inWidth, GLsizei inHeight,
       }
    }
 }
+
+
+
+/**
+ * This is the software fallback for Driver.GetTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
+                   GLenum format, GLenum type, GLvoid *pixels,
+                   const struct gl_texture_object *texObj,
+                   const struct gl_texture_image *texImage)
+{
+   GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* pack texture image into a PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
+                                     texImage->Height, texImage->Depth,
+                                     format, type, pixels)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetTexImage(invalid PBO access)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,"glGetTexImage(PBO is mapped)");
+         return;
+      }
+      pixels = ADD_POINTERS(buf, pixels);
+   }
+   else if (!pixels) {
+      /* not an error */
+      return;
+   }
+
+   {
+      const GLint width = texImage->Width;
+      const GLint height = texImage->Height;
+      const GLint depth = texImage->Depth;
+      GLint img, row;
+      for (img = 0; img < depth; img++) {
+         for (row = 0; row < height; row++) {
+            /* compute destination address in client memory */
+            GLvoid *dest = _mesa_image_address( dimensions, &ctx->Pack, pixels,
+                                                width, height, format, type,
+                                                img, row, 0);
+            assert(dest);
+
+            if (format == GL_COLOR_INDEX) {
+               GLuint indexRow[MAX_WIDTH];
+               GLint col;
+               /* Can't use FetchTexel here because that returns RGBA */
+               if (texImage->TexFormat->IndexBits == 8) {
+                  const GLubyte *src = (const GLubyte *) texImage->Data;
+                  for (col = 0; col < width; col++) {
+                     indexRow[col] = src[texImage->Width *
+                                        (img * texImage->Height + row) + col];
+                  }
+               }
+               else if (texImage->TexFormat->IndexBits == 16) {
+                  const GLushort *src = (const GLushort *) texImage->Data;
+                  for (col = 0; col < width; col++) {
+                     indexRow[col] = src[texImage->Width *
+                                        (img * texImage->Height + row) + col];
+                  }
+               }
+               else {
+                  _mesa_problem(ctx,
+                                "Color index problem in _mesa_GetTexImage");
+               }
+               _mesa_pack_index_span(ctx, width, type, dest,
+                                     indexRow, &ctx->Pack,
+                                     0 /* no image transfer */);
+            }
+            else if (format == GL_DEPTH_COMPONENT) {
+               GLfloat depthRow[MAX_WIDTH];
+               GLint col;
+               for (col = 0; col < width; col++) {
+                  (*texImage->FetchTexelf)(texImage, col, row, img,
+                                           depthRow + col);
+               }
+               _mesa_pack_depth_span(ctx, width, dest, type,
+                                     depthRow, &ctx->Pack);
+            }
+            else if (format == GL_YCBCR_MESA) {
+               /* No pixel transfer */
+               const GLint rowstride = texImage->RowStride;
+               MEMCPY(dest,
+                      (const GLushort *) texImage->Data + row * rowstride,
+                      width * sizeof(GLushort));
+               /* check for byte swapping */
+               if ((texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR
+                    && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
+                   (texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV
+                    && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
+                  if (!ctx->Pack.SwapBytes)
+                     _mesa_swap2((GLushort *) dest, width);
+               }
+               else if (ctx->Pack.SwapBytes) {
+                  _mesa_swap2((GLushort *) dest, width);
+               }
+            }
+            else {
+               /* general case:  convert row to RGBA format */
+               GLfloat rgba[MAX_WIDTH][4];
+               GLint col;
+               for (col = 0; col < width; col++) {
+                  (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
+               }
+               _mesa_pack_rgba_span_float(ctx, width,
+                                          (const GLfloat (*)[4]) rgba,
+                                          format, type, dest, &ctx->Pack,
+                                          0 /* no image transfer */);
+            } /* format */
+         } /* row */
+      } /* img */
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+
+/**
+ * This is the software fallback for Driver.GetCompressedTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_compressed_teximage(GLcontext *ctx, GLenum target, GLint level,
+                              GLvoid *img,
+                              const struct gl_texture_object *texObj,
+                              const struct gl_texture_image *texImage)
+{
+   if (ctx->Pack.BufferObj->Name) {
+      /* pack texture image into a PBO */
+      GLubyte *buf;
+      if ((const GLubyte *) img + texImage->CompressedSize >
+          (const GLubyte *) ctx->Pack.BufferObj->Size) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetCompressedTexImage(invalid PBO access)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetCompressedTexImage(PBO is mapped)");
+         return;
+      }
+      img = ADD_POINTERS(buf, img);
+   }
+   else if (!img) {
+      /* not an error */
+      return;
+   }
+
+   /* just memcpy, no pixelstore or pixel transfer */
+   MEMCPY(img, texImage->Data, texImage->CompressedSize);
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
diff --git a/src/mesa/main/texstore.h b/src/mesa/main/texstore.h
index 89faf526698..c7cbcb0cf91 100644
--- a/src/mesa/main/texstore.h
+++ b/src/mesa/main/texstore.h
@@ -1,6 +1,6 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.1
+ * Version:  6.3
  *
  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
  *
@@ -213,17 +213,32 @@ _mesa_generate_mipmap(GLcontext *ctx, GLenum target,
 
 
 extern void
-_mesa_rescale_teximage2d (GLuint bytesPerPixel,
-			  GLuint srcStrideInPixels,
-			  GLuint dstRowStride,
-			  GLint srcWidth, GLint srcHeight,
-			  GLint dstWidth, GLint dstHeight,
-			  const GLvoid *srcImage, GLvoid *dstImage);
+_mesa_rescale_teximage2d(GLuint bytesPerPixel,
+                         GLuint srcStrideInPixels,
+                         GLuint dstRowStride,
+                         GLint srcWidth, GLint srcHeight,
+                         GLint dstWidth, GLint dstHeight,
+                         const GLvoid *srcImage, GLvoid *dstImage);
 
 extern void
-_mesa_upscale_teximage2d( GLsizei inWidth, GLsizei inHeight,
-                          GLsizei outWidth, GLsizei outHeight,
-                          GLint comps, const GLchan *src, GLint srcRowStride,
-                          GLchan *dest );
+_mesa_upscale_teximage2d(GLsizei inWidth, GLsizei inHeight,
+                         GLsizei outWidth, GLsizei outHeight,
+                         GLint comps, const GLchan *src, GLint srcRowStride,
+                         GLchan *dest);
+
+
+extern void
+_mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
+                   GLenum format, GLenum type, GLvoid *pixels,
+                   const struct gl_texture_object *texObj,
+                   const struct gl_texture_image *texImage);
+
+
+extern void
+_mesa_get_compressed_teximage(GLcontext *ctx, GLenum target, GLint level,
+                              GLvoid *img,
+                              const struct gl_texture_object *texObj,
+                              const struct gl_texture_image *texImage);
+
 
 #endif