assorted changes for supporting GLfloat color channels (not done)
[mesa.git] / src / mesa / main / teximage.c
index 24244674c5fe9bd1d9d0e4377da7c69e423385c1..ffddeffbabc79da27eb186557ab4a49772b6a0f2 100644 (file)
@@ -1,21 +1,21 @@
-/* $Id: teximage.c,v 1.47 2000/09/05 22:04:30 brianp Exp $ */
+/* $Id: teximage.c,v 1.100 2001/07/13 20:07:37 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
  * Version:  3.5
- * 
- * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
- * 
+ *
+ * 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
 #include "context.h"
 #include "convolve.h"
 #include "image.h"
+#include "macros.h"
 #include "mem.h"
 #include "mmath.h"
-#include "span.h"
 #include "state.h"
+#include "texformat.h"
 #include "teximage.h"
 #include "texstate.h"
-#include "types.h"
+#include "texstore.h"
+#include "mtypes.h"
+#include "swrast/s_span.h" /* XXX SWRAST hack */
 #endif
 
 
 /*
  * NOTES:
  *
- * Mesa's native texture datatype is GLubyte.  Native formats are
+ * Mesa's native texture datatype is GLchan.  Native formats are
  * GL_ALPHA, GL_LUMINANCE, GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, GL_RGBA,
  * and GL_COLOR_INDEX.
  * Device drivers are free to implement any internal format they want.
 #ifdef DEBUG
 static void PrintTexture(const struct gl_texture_image *img)
 {
-  int i, j, c;
-  GLubyte *data = img->Data;
-
-  if (!data) {
-     printf("No texture data\n");
-     return;
-  }
-
-  switch (img->Format) {
-     case GL_ALPHA:
-     case GL_LUMINANCE:
-     case GL_INTENSITY:
-     case GL_COLOR_INDEX:
-        c = 1;
-        break;
-     case GL_LUMINANCE_ALPHA:
-        c = 2;
-        break;
-     case GL_RGB:
-        c = 3;
-        break;
-     case GL_RGBA:
-        c = 4;
-        break;
-     default:
-        gl_problem(NULL, "error in PrintTexture\n");
-        return;
-  }
-
-
-  for (i = 0; i < img->Height; i++) {
-    for (j = 0; j < img->Width; j++) {
-      if (c==1)
-        printf("%02x  ", data[0]);
-      else if (c==2)
-        printf("%02x%02x  ", data[0], data[1]);
-      else if (c==3)
-        printf("%02x%02x%02x  ", data[0], data[1], data[2]);
-      else if (c==4)
-        printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
-      data += c;
-    }
-    printf("\n");
-  }
+#if CHAN_TYPE == GL_FLOAT
+   _mesa_problem(NULL, "PrintTexture doesn't support float channels");
+#else
+   GLuint i, j, c;
+   const GLchan *data = (const GLchan *) img->Data;
+
+   if (!data) {
+      printf("No texture data\n");
+      return;
+   }
+
+   switch (img->Format) {
+      case GL_ALPHA:
+      case GL_LUMINANCE:
+      case GL_INTENSITY:
+      case GL_COLOR_INDEX:
+         c = 1;
+         break;
+      case GL_LUMINANCE_ALPHA:
+         c = 2;
+         break;
+      case GL_RGB:
+         c = 3;
+         break;
+      case GL_RGBA:
+         c = 4;
+         break;
+      default:
+         _mesa_problem(NULL, "error in PrintTexture\n");
+         return;
+   }
+
+   for (i = 0; i < img->Height; i++) {
+      for (j = 0; j < img->Width; j++) {
+         if (c==1)
+            printf("%02x  ", data[0]);
+         else if (c==2)
+            printf("%02x%02x  ", data[0], data[1]);
+         else if (c==3)
+            printf("%02x%02x%02x  ", data[0], data[1], data[2]);
+         else if (c==4)
+            printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
+         data += c;
+      }
+      printf("\n");
+   }
+#endif
 }
 #endif
 
@@ -107,7 +113,7 @@ static void PrintTexture(const struct gl_texture_image *img)
 /*
  * Compute log base 2 of n.
  * If n isn't an exact power of two return -1.
- * If n<0 return -1.
+ * If n < 0 return -1.
  */
 static int
 logbase2( int n )
@@ -115,7 +121,7 @@ logbase2( int n )
    GLint i = 1;
    GLint log2 = 0;
 
-   if (n<0) {
+   if (n < 0) {
       return -1;
    }
 
@@ -142,10 +148,10 @@ logbase2( int n )
 GLint
 _mesa_base_tex_format( GLcontext *ctx, GLint format )
 {
-  /*
-   * Ask the driver for the base format, if it doesn't
-   * know, it will return -1;
-   */
+   /*
+    * Ask the driver for the base format, if it doesn't
+    * know, it will return -1;
+    */
    if (ctx->Driver.BaseCompressedTexFormat) {
       GLint ifmt = (*ctx->Driver.BaseCompressedTexFormat)(ctx, format);
       if (ifmt >= 0) {
@@ -209,21 +215,26 @@ _mesa_base_tex_format( GLcontext *ctx, GLint format )
       case GL_COLOR_INDEX12_EXT:
       case GL_COLOR_INDEX16_EXT:
          return GL_COLOR_INDEX;
+      case GL_DEPTH_COMPONENT:
+      case GL_DEPTH_COMPONENT16_SGIX:
+      case GL_DEPTH_COMPONENT24_SGIX:
+      case GL_DEPTH_COMPONENT32_SGIX:
+         if (ctx->Extensions.SGIX_depth_texture)
+            return GL_DEPTH_COMPONENT;
+         else
+            return -1;
       default:
          return -1;  /* error */
    }
 }
 
 
-
 /*
- * Given an internal texture format enum or 1, 2, 3, 4 return the
- * corresponding _base_ internal format:  GL_ALPHA, GL_LUMINANCE,
- * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA.  Return the
- * number of components for the format.  Return -1 if invalid enum.
+ * Test if the given image format is a color/rgba format.  That is,
+ * not color index, depth, stencil, etc.
  */
-static GLint
-components_in_intformat( GLint format )
+static GLboolean
+is_color_format(GLenum format)
 {
    switch (format) {
       case GL_ALPHA:
@@ -231,14 +242,12 @@ components_in_intformat( GLint format )
       case GL_ALPHA8:
       case GL_ALPHA12:
       case GL_ALPHA16:
-         return 1;
       case 1:
       case GL_LUMINANCE:
       case GL_LUMINANCE4:
       case GL_LUMINANCE8:
       case GL_LUMINANCE12:
       case GL_LUMINANCE16:
-         return 1;
       case 2:
       case GL_LUMINANCE_ALPHA:
       case GL_LUMINANCE4_ALPHA4:
@@ -247,13 +256,11 @@ components_in_intformat( GLint format )
       case GL_LUMINANCE12_ALPHA4:
       case GL_LUMINANCE12_ALPHA12:
       case GL_LUMINANCE16_ALPHA16:
-         return 2;
       case GL_INTENSITY:
       case GL_INTENSITY4:
       case GL_INTENSITY8:
       case GL_INTENSITY12:
       case GL_INTENSITY16:
-         return 1;
       case 3:
       case GL_RGB:
       case GL_R3_G3_B2:
@@ -263,7 +270,6 @@ components_in_intformat( GLint format )
       case GL_RGB10:
       case GL_RGB12:
       case GL_RGB16:
-         return 3;
       case 4:
       case GL_RGBA:
       case GL_RGBA2:
@@ -273,7 +279,17 @@ components_in_intformat( GLint format )
       case GL_RGB10_A2:
       case GL_RGBA12:
       case GL_RGBA16:
-         return 4;
+         return GL_TRUE;
+      default:
+         return GL_FALSE;
+   }
+}
+
+
+static GLboolean
+is_index_format(GLenum format)
+{
+   switch (format) {
       case GL_COLOR_INDEX:
       case GL_COLOR_INDEX1_EXT:
       case GL_COLOR_INDEX2_EXT:
@@ -281,9 +297,9 @@ components_in_intformat( GLint format )
       case GL_COLOR_INDEX8_EXT:
       case GL_COLOR_INDEX12_EXT:
       case GL_COLOR_INDEX16_EXT:
-         return 1;
+         return GL_TRUE;
       default:
-         return -1;  /* error */
+         return GL_FALSE;
    }
 }
 
@@ -295,132 +311,34 @@ components_in_intformat( GLint format )
 static GLboolean
 is_compressed_format(GLcontext *ctx, GLenum internalFormat)
 {
-    if (ctx->Driver.IsCompressedFormat) {
-        return (*ctx->Driver.IsCompressedFormat)(ctx, internalFormat);
-    }
-    return GL_FALSE;
+   if (ctx->Driver.BaseCompressedTexFormat) {
+      GLint b = (*ctx->Driver.BaseCompressedTexFormat)(ctx, internalFormat);
+      if (b > 0)
+         return GL_TRUE;
+      else
+         return GL_FALSE;
+   }
+   return GL_FALSE;
 }
 
 
 
 /*
- * Examine the texImage->Format field and set the Red, Green, Blue, etc
- * texel component sizes to default values.
- * These fields are set only here by core Mesa but device drivers may
- * overwritting these fields to indicate true texel resolution.
+ * Store a gl_texture_image pointer in a gl_texture_object structure
+ * according to the target and level parameters.
+ * This was basically prompted by the introduction of cube maps.
  */
-static void
-set_teximage_component_sizes( struct gl_texture_image *texImage )
-{
-   switch (texImage->Format) {
-      case GL_ALPHA:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 8;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_LUMINANCE:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 8;
-         texImage->IndexBits = 0;
-         break;
-      case GL_LUMINANCE_ALPHA:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 8;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 8;
-         texImage->IndexBits = 0;
-         break;
-      case GL_INTENSITY:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 8;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_RED:
-         texImage->RedBits = 8;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_GREEN:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 8;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_BLUE:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 8;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_RGB:
-      case GL_BGR:
-         texImage->RedBits = 8;
-         texImage->GreenBits = 8;
-         texImage->BlueBits = 8;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_RGBA:
-      case GL_BGRA:
-      case GL_ABGR_EXT:
-         texImage->RedBits = 8;
-         texImage->GreenBits = 8;
-         texImage->BlueBits = 8;
-         texImage->AlphaBits = 8;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 0;
-         break;
-      case GL_COLOR_INDEX:
-         texImage->RedBits = 0;
-         texImage->GreenBits = 0;
-         texImage->BlueBits = 0;
-         texImage->AlphaBits = 0;
-         texImage->IntensityBits = 0;
-         texImage->LuminanceBits = 0;
-         texImage->IndexBits = 8;
-         break;
-      default:
-         gl_problem(NULL, "unexpected format in set_teximage_component_sizes");
-   }
-}
-
-
-static void
-set_tex_image(struct gl_texture_object *tObj,
-              GLenum target, GLint level,
-              struct gl_texture_image *texImage)
+void
+_mesa_set_tex_image(struct gl_texture_object *tObj,
+                    GLenum target, GLint level,
+                    struct gl_texture_image *texImage)
 {
    ASSERT(tObj);
    ASSERT(texImage);
    switch (target) {
+      case GL_TEXTURE_1D:
       case GL_TEXTURE_2D:
+      case GL_TEXTURE_3D:
          tObj->Image[level] = texImage;
          return;
       case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
@@ -442,12 +360,13 @@ set_tex_image(struct gl_texture_object *tObj,
          tObj->NegZ[level] = texImage;
          return;
       default:
-         gl_problem(NULL, "bad target in set_tex_image()");
+         _mesa_problem(NULL, "bad target in _mesa_set_tex_image()");
          return;
    }
 }
 
 
+
 /*
  * Return new gl_texture_image struct with all fields initialized to zero.
  */
@@ -459,42 +378,6 @@ _mesa_alloc_texture_image( void )
 
 
 
-/*
- * Initialize most fields of a gl_texture_image struct.
- */
-static void
-init_texture_image( GLcontext *ctx,
-                    struct gl_texture_image *img,
-                    GLsizei width, GLsizei height, GLsizei depth,
-                    GLint border, GLenum internalFormat )
-{
-   ASSERT(img);
-   ASSERT(!img->Data);
-   img->Format = (GLenum) _mesa_base_tex_format(ctx, internalFormat);
-   set_teximage_component_sizes( img );
-   img->IntFormat = (GLenum) internalFormat;
-   img->Border = border;
-   img->Width = width;
-   img->Height = height;
-   img->Depth = depth;
-   img->WidthLog2 = logbase2(width - 2 * border);
-   if (height == 1)  /* 1-D texture */
-      img->HeightLog2 = 0;
-   else
-      img->HeightLog2 = logbase2(height - 2 * border);
-   if (depth == 1)   /* 2-D texture */
-      img->DepthLog2 = 0;
-   else
-      img->DepthLog2 = logbase2(depth - 2 * border);
-   img->Width2 = 1 << img->WidthLog2;
-   img->Height2 = 1 << img->HeightLog2;
-   img->Depth2 = 1 << img->DepthLog2;
-   img->MaxLog2 = MAX2(img->WidthLog2, img->HeightLog2);
-   img->IsCompressed = is_compressed_format(ctx, internalFormat);
-}
-
-
-
 void
 _mesa_free_texture_image( struct gl_texture_image *teximage )
 {
@@ -506,33 +389,19 @@ _mesa_free_texture_image( struct gl_texture_image *teximage )
 }
 
 
-
 /*
- * Return number of bytes of storage needed to store a compressed texture
- * image.  Only the driver knows for sure.  If the driver can't help us,
- * we must return 0.
+ * Return GL_TRUE if the target is a proxy target.
  */
-GLuint
-_mesa_compressed_image_size(GLcontext *ctx,
-                            GLenum internalFormat,
-                            GLint numDimensions,
-                            GLint width,
-                            GLint height,
-                            GLint depth)
+static GLboolean
+is_proxy_target(GLenum target)
 {
-   if (ctx->Driver.CompressedImageSize) {
-      return (*ctx->Driver.CompressedImageSize)(ctx, internalFormat,
-                                                numDimensions,
-                                                width, height, depth);
-   }
-   else {
-      /* Shouldn't this be an internal error of some sort? */
-      return 0;
-   }
+   return (target == GL_PROXY_TEXTURE_1D ||
+           target == GL_PROXY_TEXTURE_2D ||
+           target == GL_PROXY_TEXTURE_3D ||
+           target == GL_PROXY_TEXTURE_CUBE_MAP_ARB);
 }
 
 
-
 /*
  * Given a texture unit and a texture target, return the corresponding
  * texture object.
@@ -543,15 +412,15 @@ _mesa_select_tex_object(GLcontext *ctx, const struct gl_texture_unit *texUnit,
 {
    switch (target) {
       case GL_TEXTURE_1D:
-         return texUnit->CurrentD[1];
+         return texUnit->Current1D;
       case GL_PROXY_TEXTURE_1D:
          return ctx->Texture.Proxy1D;
       case GL_TEXTURE_2D:
-         return texUnit->CurrentD[2];
+         return texUnit->Current2D;
       case GL_PROXY_TEXTURE_2D:
          return ctx->Texture.Proxy2D;
       case GL_TEXTURE_3D:
-         return texUnit->CurrentD[3];
+         return texUnit->Current3D;
       case GL_PROXY_TEXTURE_3D:
          return ctx->Texture.Proxy3D;
       case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
@@ -560,13 +429,14 @@ _mesa_select_tex_object(GLcontext *ctx, const struct gl_texture_unit *texUnit,
       case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
       case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
       case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
-         return ctx->Extensions.HaveTextureCubeMap
+      case GL_TEXTURE_CUBE_MAP_ARB:
+         return ctx->Extensions.ARB_texture_cube_map
                 ? texUnit->CurrentCubeMap : NULL;
       case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
-         return ctx->Extensions.HaveTextureCubeMap
+         return ctx->Extensions.ARB_texture_cube_map
                 ? ctx->Texture.ProxyCubeMap : NULL;
       default:
-         gl_problem(NULL, "bad target in _mesa_select_tex_object()");
+         _mesa_problem(NULL, "bad target in _mesa_select_tex_object()");
          return NULL;
    }
 }
@@ -581,396 +451,81 @@ _mesa_select_tex_image(GLcontext *ctx, const struct gl_texture_unit *texUnit,
                        GLenum target, GLint level)
 {
    ASSERT(texUnit);
+   ASSERT(level < MAX_TEXTURE_LEVELS);
    switch (target) {
       case GL_TEXTURE_1D:
-         return texUnit->CurrentD[1]->Image[level];
+         return texUnit->Current1D->Image[level];
       case GL_PROXY_TEXTURE_1D:
          return ctx->Texture.Proxy1D->Image[level];
       case GL_TEXTURE_2D:
-         return texUnit->CurrentD[2]->Image[level];
+         return texUnit->Current2D->Image[level];
       case GL_PROXY_TEXTURE_2D:
          return ctx->Texture.Proxy2D->Image[level];
       case GL_TEXTURE_3D:
-         return texUnit->CurrentD[3]->Image[level];
+         return texUnit->Current3D->Image[level];
       case GL_PROXY_TEXTURE_3D:
          return ctx->Texture.Proxy3D->Image[level];
       case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->Image[level];
          else
             return NULL;
       case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->NegX[level];
          else
             return NULL;
       case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->PosY[level];
          else
             return NULL;
       case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->NegY[level];
          else
             return NULL;
       case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->PosZ[level];
          else
             return NULL;
       case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return texUnit->CurrentCubeMap->NegZ[level];
          else
             return NULL;
       case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
-         if (ctx->Extensions.HaveTextureCubeMap)
+         if (ctx->Extensions.ARB_texture_cube_map)
             return ctx->Texture.ProxyCubeMap->Image[level];
          else
             return NULL;
       default:
-         gl_problem(ctx, "bad target in _mesa_select_tex_image()");
+         _mesa_problem(ctx, "bad target in _mesa_select_tex_image()");
          return NULL;
    }
 }
 
 
 
-/*
- * Calling glTexImage and related functions when convolution is enabled
- * with GL_REDUCE border mode causes some complications.
- * The incoming image must be extra large so that the post-convolution
- * image size is reduced to a power of two size (plus 2 * border).
- * This function adjusts a texture width and height accordingly if
- * convolution with GL_REDUCE is enabled.
- */
-static void
-adjust_texture_size_for_convolution(const GLcontext *ctx, GLuint dimensions,
-                                    GLsizei *width, GLsizei *height)
-{
-   if (ctx->Pixel.Convolution1DEnabled
-       && dimensions == 1
-       && ctx->Pixel.ConvolutionBorderMode[0] == GL_REDUCE) {
-      *width = *width - (MAX2(ctx->Convolution1D.Width, 1) - 1);
-   }
-   else if (ctx->Pixel.Convolution2DEnabled
-            && dimensions > 1
-            && ctx->Pixel.ConvolutionBorderMode[1] == GL_REDUCE) {
-      *width = *width - (MAX2(ctx->Convolution2D.Width, 1) - 1);
-      *height = *height - (MAX2(ctx->Convolution2D.Height, 1) - 1);
-   }
-   else if (ctx->Pixel.Separable2DEnabled
-            && dimensions > 1
-            && ctx->Pixel.ConvolutionBorderMode[2] == GL_REDUCE) {
-      *width = *width - (MAX2(ctx->Separable2D.Width, 1) - 1);
-      *height = *height - (MAX2(ctx->Separable2D.Height, 1) - 1);
-   }
-}
-
-
-
-/*
- * This function is used to move user image data into a texture image.
- * We handle full texture images and subtexture images.  We also take
- * care of all image transfer operations here, including convolution.
- * Input:
- *         dstXoffset, dstYoffset, dstZoffset - offsets in pixels
- *         dstRowStride, dstImageStride - strides in bytes
- */
-static void
-fill_texture_image( GLcontext *ctx, GLuint dimensions,
-                    GLenum texFormat, GLubyte *texAddr,
-                    GLint srcWidth, GLint srcHeight, GLint srcDepth,
-                    GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
-                    GLint dstRowStride, GLint dstImageStride,
-                    GLenum srcFormat, GLenum srcType, const GLvoid *srcAddr,
-                    const struct gl_pixelstore_attrib *srcPacking)
-{
-   GLint texComponents;
-
-   ASSERT(ctx);
-   ASSERT(dimensions >= 1 && dimensions <= 3);
-   ASSERT(texAddr);
-   ASSERT(srcWidth >= 1);
-   ASSERT(srcHeight >= 1);
-   ASSERT(srcDepth >= 1);
-   ASSERT(dstXoffset >= 0);
-   ASSERT(dstYoffset >= 0);
-   ASSERT(dstZoffset >= 0);
-   ASSERT(dstRowStride >= 0);
-   ASSERT(dstImageStride >= 0);
-   ASSERT(srcAddr);
-   ASSERT(srcPacking);
-
-   texComponents = components_in_intformat(texFormat);
-
-   /* try common 2D texture cases first */
-   if (!ctx->ImageTransferState && dimensions == 2
-       && srcType == GL_UNSIGNED_BYTE) {
-
-      if (srcFormat == texFormat) {
-         /* This will cover the common GL_RGB, GL_RGBA, GL_ALPHA,
-          * GL_LUMINANCE_ALPHA, etc. texture formats.  Use memcpy().
-          */
-         const GLubyte *src = (const GLubyte *) _mesa_image_address(
-                                   srcPacking, srcAddr, srcWidth, srcHeight,
-                                   srcFormat, srcType, 0, 0, 0);
-         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
-                                               srcWidth, srcFormat, srcType);
-         const GLint widthInBytes = srcWidth * texComponents;
-         GLubyte *dst = texAddr + dstYoffset * dstRowStride
-                      + dstXoffset * texComponents * sizeof(GLubyte);
-         if (srcRowStride == widthInBytes && dstRowStride == widthInBytes) {
-            MEMCPY(dst, src, srcHeight * widthInBytes);
-         }
-         else {
-            GLint i;
-            for (i = 0; i < srcHeight; i++) {
-               MEMCPY(dst, src, widthInBytes);
-               src += srcRowStride;
-               dst += dstRowStride;
-            }
-         }
-         return;  /* all done */
-      }
-      else if (srcFormat == GL_RGBA && texFormat == GL_RGB) {
-         /* commonly used by Quake */
-         const GLubyte *src = (const GLubyte *) _mesa_image_address(
-                                   srcPacking, srcAddr, srcWidth, srcHeight,
-                                   srcFormat, srcType, 0, 0, 0);
-         const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
-                                               srcWidth, srcFormat, srcType);
-         GLubyte *dst = texAddr + dstYoffset * dstRowStride
-                      + dstXoffset * texComponents * sizeof(GLubyte);
-         GLint i, j;
-         for (i = 0; i < srcHeight; i++) {
-            const GLubyte *s = src;
-            GLubyte *d = dst;
-            for (j = 0; j < srcWidth; j++) {
-               *d++ = *s++;  /*red*/
-               *d++ = *s++;  /*green*/
-               *d++ = *s++;  /*blue*/
-               s++;          /*alpha*/
-            }
-            src += srcRowStride;
-            dst += dstRowStride;
-         }
-         return;  /* all done */
-      }
-   }      
-
-   /*
-    * General case solutions
-    */
-   if (texFormat == GL_COLOR_INDEX) {
-      /* color index texture */
-      const GLenum texType = GL_UNSIGNED_BYTE;
-      GLint img, row;
-      GLubyte *dest = texAddr + dstZoffset * dstImageStride
-                    + dstYoffset * dstRowStride
-                    + dstXoffset * texComponents * sizeof(GLubyte);
-      for (img = 0; img < srcDepth; img++) {
-         GLubyte *destRow = dest;
-         for (row = 0; row < srcHeight; row++) {
-            const GLvoid *src = _mesa_image_address(srcPacking,
-                srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
-            _mesa_unpack_index_span(ctx, srcWidth, texType, destRow,
-                                    srcType, src, srcPacking,
-                                    ctx->ImageTransferState);
-            destRow += dstRowStride;
-         }
-         dest += dstImageStride;
-      }
-   }
-   else {
-      /* regular, color texture */
-      if ((dimensions == 1 && ctx->Pixel.Convolution1DEnabled) ||
-          (dimensions >= 2 && ctx->Pixel.Convolution2DEnabled) ||
-          (dimensions >= 2 && ctx->Pixel.Separable2DEnabled)) {
-         /*
-          * Fill texture image with convolution
-          */
-         GLint img, row;
-         GLint convWidth = srcWidth, convHeight = srcHeight;
-         GLfloat *tmpImage, *convImage;
-         tmpImage = (GLfloat *) MALLOC(srcWidth * srcHeight * 4 * sizeof(GLfloat));
-         if (!tmpImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
-            return;
-         }
-         convImage = (GLfloat *) MALLOC(srcWidth * srcHeight * 4 * sizeof(GLfloat));
-         if (!convImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
-            FREE(tmpImage);
-            return;
-         }
-
-         for (img = 0; img < srcDepth; img++) {
-            const GLfloat *srcf;
-            GLfloat *dstf = tmpImage;
-            GLubyte *dest;
-
-            /* unpack and do transfer ops up to convolution */
-            for (row = 0; row < srcHeight; row++) {
-               const GLvoid *src = _mesa_image_address(srcPacking,
-                                              srcAddr, srcWidth, srcHeight,
-                                              srcFormat, srcType, img, row, 0);
-               _mesa_unpack_float_color_span(ctx, srcWidth, GL_RGBA, dstf,
-                          srcFormat, srcType, src, srcPacking,
-                          ctx->ImageTransferState & IMAGE_PRE_CONVOLUTION_BITS,
-                          GL_TRUE);
-               dstf += srcWidth * 4;
-            }
-
-            /* convolve */
-            if (dimensions == 1) {
-               ASSERT(ctx->Pixel.Convolution1DEnabled);
-               _mesa_convolve_1d_image(ctx, &convWidth, tmpImage, convImage);
-            }
-            else {         
-               if (ctx->Pixel.Convolution2DEnabled) {
-                  _mesa_convolve_2d_image(ctx, &convWidth, &convHeight,
-                                          tmpImage, convImage);
-               }
-               else {
-                  ASSERT(ctx->Pixel.Separable2DEnabled);
-                  _mesa_convolve_sep_image(ctx, &convWidth, &convHeight,
-                                           tmpImage, convImage);
-               }
-            }
-
-            /* packing and transfer ops after convolution */
-            srcf = convImage;
-            dest = texAddr + (dstZoffset + img) * dstImageStride
-                 + dstYoffset * dstRowStride;
-            for (row = 0; row < convHeight; row++) {
-               _mesa_pack_float_rgba_span(ctx, convWidth,
-                                          (const GLfloat (*)[4]) srcf,
-                                          texFormat, GL_UNSIGNED_BYTE,
-                                          dest, &_mesa_native_packing,
-                                          ctx->ImageTransferState
-                                          & IMAGE_POST_CONVOLUTION_BITS);
-               srcf += convWidth * 4;
-               dest += dstRowStride;
-            }
-         }
-
-         FREE(convImage);
-         FREE(tmpImage);
-      }
-      else {
-         /*
-          * no convolution
-          */
-         GLint img, row;
-         GLubyte *dest = texAddr + dstZoffset * dstImageStride
-                       + dstYoffset * dstRowStride
-                       + dstXoffset * texComponents * sizeof(GLubyte);
-         for (img = 0; img < srcDepth; img++) {
-            GLubyte *destRow = dest;
-            for (row = 0; row < srcHeight; row++) {
-               const GLvoid *srcRow = _mesa_image_address(srcPacking,
-                                              srcAddr, srcWidth, srcHeight,
-                                              srcFormat, srcType, img, row, 0);
-               _mesa_unpack_ubyte_color_span(ctx, srcWidth, texFormat, destRow,
-                                       srcFormat, srcType, srcRow, srcPacking,
-                                       ctx->ImageTransferState);
-               destRow += dstRowStride;
-            }
-            dest += dstImageStride;
-         }
-      }
-   }
-}
-
-
-
-/* Need this to prevent an out-of-bounds memory access when using
- * X86 optimized code.
- */
-#ifdef USE_X86_ASM
-#  define EXTRA_BYTE 1
-#else
-#  define EXTRA_BYTE 0
-#endif
-
-
-
-/*
- * Called by glTexImage[123]D.  Fill in a texture image with data given
- * by the client.  All pixel transfer and unpack modes are handled here.
- * Input:  dimensions (1, 2, or 3)
- *         texImage - destination texture image (we'll malloc the memory)
- *         width, height, depth - size of source image
- *         srcFormat, srcType - source image format and type
- *         pixels - source image data
- *         srcPacking - source image packing parameters
- *
- * NOTE: All texture image parameters should have already been error checked.
- *
- * NOTE: the texImage dimensions and source image dimensions must be correct
- * with respect to convolution with border mode = reduce.
- */
-static void
-make_texture_image( GLcontext *ctx, GLuint dimensions,
-                    struct gl_texture_image *texImage,
-                    GLint width, GLint height, GLint depth,
-                    GLenum srcFormat, GLenum srcType, const GLvoid *pixels,
-                    const struct gl_pixelstore_attrib *srcPacking)
-{
-   const GLint internalFormat = texImage->IntFormat;
-   const GLint components = components_in_intformat(internalFormat);
-   GLint convWidth = width, convHeight = height;
-
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE) {
-      _mesa_update_image_transfer_state(ctx);
-   }
-
-   if (ctx->ImageTransferState & IMAGE_CONVOLUTION_BIT) {
-      adjust_texture_size_for_convolution(ctx, dimensions,
-                                          &convWidth, &convHeight);
-   }
-
-   texImage->Data = (GLubyte *) MALLOC(convWidth * convHeight * depth
-                                       * components + EXTRA_BYTE);
-   if (!texImage->Data)
-      return;      /* out of memory */
-
-   fill_texture_image(ctx, dimensions, texImage->Format, texImage->Data,
-                      width, height, depth, 0, 0, 0,
-                      convWidth * components * sizeof(GLubyte),
-                      convWidth * convHeight * components * sizeof(GLubyte),
-                      srcFormat, srcType, pixels, srcPacking);
-}
-
-
-
 /*
  * glTexImage[123]D can accept a NULL image pointer.  In this case we
  * create a texture image with unspecified image contents per the OpenGL
- * spec.  This function creates an empty image for the given texture image.
+ * spec.
  */
-static void
-make_null_texture( struct gl_texture_image *texImage )
+static GLubyte *
+make_null_texture(GLint width, GLint height, GLint depth, GLenum format)
 {
-   GLint components;
-   GLint numPixels;
-
-   ASSERT(texImage);
-   ASSERT(!texImage->Data);
-
-   components = components_in_intformat(texImage->IntFormat);
-   numPixels = texImage->Width * texImage->Height * texImage->Depth;
-
-   texImage->Data = (GLubyte *) MALLOC( numPixels * components + EXTRA_BYTE );
+   const GLint components = _mesa_components_in_format(format);
+   const GLint numPixels = width * height * depth;
+   GLubyte *data = (GLubyte *) MALLOC(numPixels * components * sizeof(GLubyte));
 
    /*
     * Let's see if anyone finds this.  If glTexImage2D() is called with
     * a NULL image pointer then load the texture image with something
     * interesting instead of leaving it indeterminate.
     */
-   if (texImage->Data) {
+   if (data) {
       static const char message[8][32] = {
          "   X   X  XXXXX   XXX     X    ",
          "   XX XX  X      X   X   X X   ",
@@ -982,40 +537,41 @@ make_null_texture( struct gl_texture_image *texImage )
          "                               "
       };
 
-      GLubyte *imgPtr = texImage->Data;
-      GLint i, j, k;
-      for (i = 0; i < texImage->Height; i++) {
-         GLint srcRow = 7 - i % 8;
-         for (j = 0; j < texImage->Width; j++) {
-            GLint srcCol = j % 32;
-            GLint texel = (message[srcRow][srcCol]=='X') ? 255 : 70;
-            for (k=0;k<components;k++) {
-               *imgPtr++ = (GLubyte) texel;
+      GLubyte *imgPtr = data;
+      GLint h, i, j, k;
+      for (h = 0; h < depth; h++) {
+         for (i = 0; i < height; i++) {
+            GLint srcRow = 7 - (i % 8);
+            for (j = 0; j < width; j++) {
+               GLint srcCol = j % 32;
+               GLubyte texel = (message[srcRow][srcCol]=='X') ? 255 : 70;
+               for (k = 0; k < components; k++) {
+                  *imgPtr++ = texel;
+               }
             }
          }
       }
    }
+
+   return data;
 }
 
 
 
 /*
+ * Reset the fields of a gl_texture_image struct to zero.
  * This is called when a proxy texture test fails, we set all the
  * image members (except DriverData) to zero.
+ * It's also used in glTexImage[123]D as a safeguard to be sure all
+ * required fields get initialized properly by the Driver.TexImage[123]D
+ * functions.
  */
 static void
-clear_proxy_teximage(struct gl_texture_image *img)
+clear_teximage_fields(struct gl_texture_image *img)
 {
    ASSERT(img);
    img->Format = 0;
    img->IntFormat = 0;
-   img->RedBits = 0;
-   img->GreenBits = 0;
-   img->BlueBits = 0;
-   img->AlphaBits = 0;
-   img->IntensityBits = 0;
-   img->LuminanceBits = 0;
-   img->IndexBits = 0;
    img->Border = 0;
    img->Width = 0;
    img->Height = 0;
@@ -1027,11 +583,47 @@ clear_proxy_teximage(struct gl_texture_image *img)
    img->HeightLog2 = 0;
    img->DepthLog2 = 0;
    img->Data = NULL;
+   img->TexFormat = &_mesa_null_texformat;
+   img->FetchTexel = NULL;
    img->IsCompressed = 0;
    img->CompressedSize = 0;
 }
 
 
+/*
+ * Initialize basic fields of the gl_texture_image struct.
+ */
+void
+_mesa_init_teximage_fields(GLcontext *ctx,
+                           struct gl_texture_image *img,
+                           GLsizei width, GLsizei height, GLsizei depth,
+                           GLint border, GLenum internalFormat)
+{
+   ASSERT(img);
+   img->Format = _mesa_base_tex_format( ctx, internalFormat );
+   ASSERT(img->Format > 0);
+   img->IntFormat = internalFormat;
+   img->Border = border;
+   img->Width = width;
+   img->Height = height;
+   img->Depth = depth;
+   img->WidthLog2 = logbase2(width - 2 * border);
+   if (height == 1)  /* 1-D texture */
+      img->HeightLog2 = 0;
+   else
+      img->HeightLog2 = logbase2(height - 2 * border);
+   if (depth == 1)   /* 2-D texture */
+      img->DepthLog2 = 0;
+   else
+      img->DepthLog2 = logbase2(depth - 2 * border);
+   img->Width2 = 1 << img->WidthLog2;
+   img->Height2 = 1 << img->HeightLog2;
+   img->Depth2 = 1 << img->DepthLog2;
+   img->MaxLog2 = MAX2(img->WidthLog2, img->HeightLog2);
+   img->IsCompressed = is_compressed_format(ctx, internalFormat);
+}
+
+
 
 /*
  * Test glTexImage[123]D() parameters for errors.
@@ -1049,65 +641,76 @@ texture_error_check( GLcontext *ctx, GLenum target,
 {
    GLboolean isProxy;
    GLint iformat;
+   GLint maxLevels = 0, maxTextureSize;
 
    if (dimensions == 1) {
       isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_1D);
       if (target != GL_TEXTURE_1D && !isProxy) {
-         gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.MaxTextureLevels;
    }
    else if (dimensions == 2) {
-      isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_2D);
+      isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_2D ||
+                             target == GL_PROXY_TEXTURE_CUBE_MAP_ARB);
       if (target != GL_TEXTURE_2D && !isProxy &&
-          !(ctx->Extensions.HaveTextureCubeMap &&
+          !(ctx->Extensions.ARB_texture_cube_map &&
             target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
             target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
-          gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
+          _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
           return GL_TRUE;
       }
+      if (target == GL_PROXY_TEXTURE_2D && target == GL_TEXTURE_2D)
+         maxLevels = ctx->Const.MaxTextureLevels;
+      else
+         maxLevels = ctx->Const.MaxCubeTextureLevels;
    }
    else if (dimensions == 3) {
       isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_3D);
       if (target != GL_TEXTURE_3D && !isProxy) {
-         gl_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.Max3DTextureLevels;
    }
    else {
-      gl_problem( ctx, "bad dims in texture_error_check" );
+      _mesa_problem( ctx, "bad dims in texture_error_check" );
       return GL_TRUE;
    }
 
+   ASSERT(maxLevels > 0);
+   maxTextureSize = 1 << (maxLevels - 1);
+
    /* Border */
    if (border != 0 && border != 1) {
       if (!isProxy) {
          char message[100];
-         sprintf(message, "glTexImage%dD(border)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glTexImage%dD(border=%d)", dimensions, border);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
       }
       return GL_TRUE;
    }
 
    /* Width */
-   if (width < 2 * border || width > 2 + ctx->Const.MaxTextureSize
+   if (width < 2 * border || width > 2 + maxTextureSize
        || logbase2( width - 2 * border ) < 0) {
       if (!isProxy) {
          char message[100];
-         sprintf(message, "glTexImage%dD(width)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glTexImage%dD(width=%d)", dimensions, width);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
       }
       return GL_TRUE;
    }
 
    /* Height */
    if (dimensions >= 2) {
-      if (height < 2 * border || height > 2 + ctx->Const.MaxTextureSize
+      if (height < 2 * border || height > 2 + maxTextureSize
           || logbase2( height - 2 * border ) < 0) {
          if (!isProxy) {
             char message[100];
-            sprintf(message, "glTexImage%dD(height)", dimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
+            sprintf(message, "glTexImage%dD(height=%d)", dimensions, height);
+            _mesa_error(ctx, GL_INVALID_VALUE, message);
          }
          return GL_TRUE;
       }
@@ -1118,7 +721,7 @@ texture_error_check( GLcontext *ctx, GLenum target,
        target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
       if (width != height) {
          if (!isProxy) {
-            gl_error(ctx, GL_INVALID_VALUE, "glTexImage2D(width != height)");
+            _mesa_error(ctx, GL_INVALID_VALUE, "glTexImage2D(width != height)");
          }
          return GL_TRUE;
       }
@@ -1126,47 +729,60 @@ texture_error_check( GLcontext *ctx, GLenum target,
 
    /* Depth */
    if (dimensions >= 3) {
-      if (depth < 2 * border || depth > 2 + ctx->Const.MaxTextureSize
+      if (depth < 2 * border || depth > 2 + maxTextureSize
           || logbase2( depth - 2 * border ) < 0) {
          if (!isProxy) {
-            gl_error( ctx, GL_INVALID_VALUE, "glTexImage3D(depth)" );
+            char message[100];
+            sprintf(message, "glTexImage3D(depth=%d)", depth );
+            _mesa_error( ctx, GL_INVALID_VALUE, message );
          }
          return GL_TRUE;
       }
    }
 
    /* Level */
-   if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
+   if (level < 0 || level >= maxLevels) {
       if (!isProxy) {
          char message[100];
-         sprintf(message, "glTexImage%dD(level)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glTexImage%dD(level=%d)", dimensions, level);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
       }
       return GL_TRUE;
    }
 
+   /* For cube map, width must equal height */
+   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
+       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
+      if (width != height) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glTexImage2D(width != height)");
+         return GL_TRUE;
+      }
+   }
+
    iformat = _mesa_base_tex_format( ctx, internalFormat );
    if (iformat < 0) {
       if (!isProxy) {
          char message[100];
-         sprintf(message, "glTexImage%dD(internalFormat)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glTexImage%dD(internalFormat=0x%x)", dimensions,
+                 internalFormat);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
       }
       return GL_TRUE;
    }
 
-   if (!is_compressed_format(ctx, internalFormat)) {
-      if (!_mesa_is_legal_format_and_type( format, type )) {
-         /* Yes, generate GL_INVALID_OPERATION, not GL_INVALID_ENUM, if there
-          * is a type/format mismatch.  See 1.2 spec page 94, sec 3.6.4.
-          */
-         if (!isProxy) {
-            char message[100];
-            sprintf(message, "glTexImage%dD(format or type)", dimensions);
-            gl_error(ctx, GL_INVALID_OPERATION, message);
-         }
-         return GL_TRUE;
+   ASSERT(iformat > 0);
+
+   if (!is_compressed_format( ctx, internalFormat ) &&
+       !_mesa_is_legal_format_and_type( format, type )) {
+      /* Yes, generate GL_INVALID_OPERATION, not GL_INVALID_ENUM, if there
+       * is a type/format mismatch.  See 1.2 spec page 94, sec 3.6.4.
+       */
+      if (!isProxy) {
+        char message[100];
+        sprintf(message, "glTexImage%dD(format or type)", dimensions);
+        _mesa_error(ctx, GL_INVALID_OPERATION, message);
       }
+      return GL_TRUE;
    }
 
    /* if we get here, the parameters are OK */
@@ -1190,102 +806,133 @@ subtexture_error_check( GLcontext *ctx, GLuint dimensions,
 {
    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    struct gl_texture_image *destTex;
+   GLint maxLevels = 0;
+   GLboolean compressed;
 
    if (dimensions == 1) {
       if (target != GL_TEXTURE_1D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.MaxTextureLevels;
    }
    else if (dimensions == 2) {
-      if (ctx->Extensions.HaveTextureCubeMap) {
+      if (ctx->Extensions.ARB_texture_cube_map) {
          if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
               target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
              target != GL_TEXTURE_2D) {
-            gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
+            _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
             return GL_TRUE;
          }
       }
       else if (target != GL_TEXTURE_2D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
          return GL_TRUE;
       }
+      if (target == GL_PROXY_TEXTURE_2D && target == GL_TEXTURE_2D)
+         maxLevels = ctx->Const.MaxTextureLevels;
+      else
+         maxLevels = ctx->Const.MaxCubeTextureLevels;
    }
    else if (dimensions == 3) {
       if (target != GL_TEXTURE_3D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage3D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.Max3DTextureLevels;
    }
    else {
-      gl_problem( ctx, "bad dims in texture_error_check" );
+      _mesa_problem( ctx, "bad dims in texture_error_check" );
       return GL_TRUE;
    }
 
-   if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
-      gl_error(ctx, GL_INVALID_ENUM, "glTexSubImage2D(level)");
+   ASSERT(maxLevels > 0);
+
+   if (level < 0 || level >= maxLevels) {
+      char message[100];
+      sprintf(message, "glTexSubImage2D(level=%d)", level);
+      _mesa_error(ctx, GL_INVALID_ENUM, message);
       return GL_TRUE;
    }
 
    if (width < 0) {
       char message[100];
-      sprintf(message, "glTexSubImage%dD(width)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glTexSubImage%dD(width=%d)", dimensions, width);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
    if (height < 0 && dimensions > 1) {
       char message[100];
-      sprintf(message, "glTexSubImage%dD(height)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glTexSubImage%dD(height=%d)", dimensions, height);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
    if (depth < 0 && dimensions > 2) {
       char message[100];
-      sprintf(message, "glTexSubImage%dD(depth)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glTexSubImage%dD(depth=%d)", dimensions, depth);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
-   destTex = texUnit->CurrentD[2]->Image[level];
+   destTex = _mesa_select_tex_image(ctx, texUnit, target, level);
+
    if (!destTex) {
-      gl_error(ctx, GL_INVALID_OPERATION, "glTexSubImage2D");
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glTexSubImage2D");
       return GL_TRUE;
    }
 
    if (xoffset < -((GLint)destTex->Border)) {
-      gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset)");
+      _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset)");
       return GL_TRUE;
    }
    if (xoffset + width > (GLint) (destTex->Width + destTex->Border)) {
-      gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset+width)");
+      _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset+width)");
       return GL_TRUE;
    }
    if (dimensions > 1) {
       if (yoffset < -((GLint)destTex->Border)) {
-         gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset)");
+         _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset)");
          return GL_TRUE;
       }
       if (yoffset + height > (GLint) (destTex->Height + destTex->Border)) {
-         gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset+height)");
+         _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset+height)");
          return GL_TRUE;
       }
    }
    if (dimensions > 2) {
       if (zoffset < -((GLint)destTex->Border)) {
-         gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset)");
+         _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset)");
          return GL_TRUE;
       }
-      if (zoffset + depth  > (GLint) (destTex->Depth+destTex->Border)) {
-         gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset+depth)");
+      if (zoffset + depth  > (GLint) (destTex->Depth + destTex->Border)) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset+depth)");
          return GL_TRUE;
       }
    }
 
-   if (!is_compressed_format(ctx, destTex->IntFormat)) {
-      if (!_mesa_is_legal_format_and_type(format, type)) {
-         char message[100];
-         sprintf(message, "glTexSubImage%dD(format or type)", dimensions);
-         gl_error(ctx, GL_INVALID_ENUM, message);
+   compressed = is_compressed_format(ctx, destTex->IntFormat);
+
+   if (!compressed && !_mesa_is_legal_format_and_type(format, type)) {
+      char message[100];
+      sprintf(message, "glTexSubImage%dD(format or type)", dimensions);
+      _mesa_error(ctx, GL_INVALID_ENUM, message);
+      return GL_TRUE;
+   }
+
+   if (compressed) {
+      if (xoffset != -destTex->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glTexSubImage1/2/3D(xoffset != -border");
+         return GL_TRUE;
+      }
+      if (dimensions > 1 && yoffset != -destTex->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glTexSubImage2/3D(yoffset != -border");
+         return GL_TRUE;
+      }
+      if (dimensions > 2 && zoffset != -destTex->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glTexSubImage3D(zoffset != -border");
          return GL_TRUE;
       }
    }
@@ -1305,52 +952,61 @@ copytexture_error_check( GLcontext *ctx, GLuint dimensions,
                          GLint width, GLint height, GLint border )
 {
    GLint iformat;
+   GLint maxLevels = 0, maxTextureSize;
 
    if (dimensions == 1) {
       if (target != GL_TEXTURE_1D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.MaxTextureLevels;
    }
    else if (dimensions == 2) {
-      if (ctx->Extensions.HaveTextureCubeMap) {
+      if (ctx->Extensions.ARB_texture_cube_map) {
          if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
               target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
              target != GL_TEXTURE_2D) {
-            gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
+            _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
             return GL_TRUE;
          }
       }
       else if (target != GL_TEXTURE_2D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
          return GL_TRUE;
       }
+      if (target == GL_PROXY_TEXTURE_2D && target == GL_TEXTURE_2D)
+         maxLevels = ctx->Const.MaxTextureLevels;
+      else
+         maxLevels = ctx->Const.MaxCubeTextureLevels;
    }
 
+   ASSERT(maxLevels > 0);
+   maxTextureSize = 1 << (maxLevels - 1);
+
    /* Border */
-   if (border!=0 && border!=1) {
+   if (border != 0 && border != 1) {
       char message[100];
       sprintf(message, "glCopyTexImage%dD(border)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
    /* Width */
-   if (width < 2 * border || width > 2 + ctx->Const.MaxTextureSize
+   if (width < 2 * border || width > 2 + maxTextureSize
        || logbase2( width - 2 * border ) < 0) {
       char message[100];
-      sprintf(message, "glCopyTexImage%dD(width)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexImage%dD(width=%d)", dimensions, width);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
    /* Height */
    if (dimensions >= 2) {
-      if (height < 2 * border || height > 2 + ctx->Const.MaxTextureSize
+      if (height < 2 * border || height > 2 + maxTextureSize
           || logbase2( height - 2 * border ) < 0) {
          char message[100];
-         sprintf(message, "glCopyTexImage%dD(height)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glCopyTexImage%dD(height=%d)", dimensions, height);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
          return GL_TRUE;
       }
    }
@@ -1359,24 +1015,24 @@ copytexture_error_check( GLcontext *ctx, GLuint dimensions,
    if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
        target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
       if (width != height) {
-         gl_error(ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width != height)");
+         _mesa_error(ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width != height)");
          return GL_TRUE;
       }
    }
 
    /* Level */
-   if (level<0 || level>=ctx->Const.MaxTextureLevels) {
+   if (level < 0 || level >= maxLevels) {
       char message[100];
-      sprintf(message, "glCopyTexImage%dD(level)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexImage%dD(level=%d)", dimensions, level);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
-   iformat = _mesa_base_tex_format( ctx, internalFormat );
+   iformat = _mesa_base_tex_format(ctx, internalFormat);
    if (iformat < 0) {
       char message[100];
       sprintf(message, "glCopyTexImage%dD(internalFormat)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
@@ -1393,86 +1049,96 @@ copytexsubimage_error_check( GLcontext *ctx, GLuint dimensions,
 {
    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    struct gl_texture_image *teximage;
+   GLint maxLevels = 0;
+   GLboolean compressed;
 
    if (dimensions == 1) {
       if (target != GL_TEXTURE_1D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.MaxTextureLevels;
    }
    else if (dimensions == 2) {
-      if (ctx->Extensions.HaveTextureCubeMap) {
+      if (ctx->Extensions.ARB_texture_cube_map) {
          if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
               target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
              target != GL_TEXTURE_2D) {
-            gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
+            _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
             return GL_TRUE;
          }
       }
       else if (target != GL_TEXTURE_2D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
          return GL_TRUE;
       }
+      if (target == GL_PROXY_TEXTURE_2D && target == GL_TEXTURE_2D)
+         maxLevels = ctx->Const.MaxTextureLevels;
+      else
+         maxLevels = ctx->Const.MaxCubeTextureLevels;
    }
    else if (dimensions == 3) {
       if (target != GL_TEXTURE_3D) {
-         gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3D(target)" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3D(target)" );
          return GL_TRUE;
       }
+      maxLevels = ctx->Const.Max3DTextureLevels;
    }
 
-   if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
+   ASSERT(maxLevels > 0);
+
+   if (level < 0 || level >= maxLevels) {
       char message[100];
-      sprintf(message, "glCopyTexSubImage%dD(level)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexSubImage%dD(level=%d)", dimensions, level);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
    if (width < 0) {
       char message[100];
-      sprintf(message, "glCopyTexSubImage%dD(width)", dimensions );
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexSubImage%dD(width=%d)", dimensions, width);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
    if (dimensions > 1 && height < 0) {
       char message[100];
-      sprintf(message, "glCopyTexSubImage%dD(height)", dimensions );
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexSubImage%dD(height=%d)", dimensions, height);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
 
-   teximage = texUnit->CurrentD[dimensions]->Image[level];
+   teximage = _mesa_select_tex_image(ctx, texUnit, target, level);
    if (!teximage) {
       char message[100];
       sprintf(message, "glCopyTexSubImage%dD(undefined texture)", dimensions);
-      gl_error(ctx, GL_INVALID_OPERATION, message);
+      _mesa_error(ctx, GL_INVALID_OPERATION, message);
       return GL_TRUE;
    }
 
    if (xoffset < -((GLint)teximage->Border)) {
       char message[100];
-      sprintf(message, "glCopyTexSubImage%dD(xoffset)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      sprintf(message, "glCopyTexSubImage%dD(xoffset=%d)", dimensions, xoffset);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
-   if (xoffset+width > (GLint) (teximage->Width+teximage->Border)) {
+   if (xoffset + width > (GLint) (teximage->Width + teximage->Border)) {
       char message[100];
       sprintf(message, "glCopyTexSubImage%dD(xoffset+width)", dimensions);
-      gl_error(ctx, GL_INVALID_VALUE, message);
+      _mesa_error(ctx, GL_INVALID_VALUE, message);
       return GL_TRUE;
    }
    if (dimensions > 1) {
       if (yoffset < -((GLint)teximage->Border)) {
          char message[100];
-         sprintf(message, "glCopyTexSubImage%dD(yoffset)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         sprintf(message, "glCopyTexSubImage%dD(yoffset=%d)", dimensions, yoffset);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
          return GL_TRUE;
       }
       /* NOTE: we're adding the border here, not subtracting! */
-      if (yoffset+height > (GLint) (teximage->Height+teximage->Border)) {
+      if (yoffset + height > (GLint) (teximage->Height + teximage->Border)) {
          char message[100];
          sprintf(message, "glCopyTexSubImage%dD(yoffset+height)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
          return GL_TRUE;
       }
    }
@@ -1481,13 +1147,32 @@ copytexsubimage_error_check( GLcontext *ctx, GLuint dimensions,
       if (zoffset < -((GLint)teximage->Border)) {
          char message[100];
          sprintf(message, "glCopyTexSubImage%dD(zoffset)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
          return GL_TRUE;
       }
-      if (zoffset > (GLint) (teximage->Depth+teximage->Border)) {
+      if (zoffset > (GLint) (teximage->Depth + teximage->Border)) {
          char message[100];
          sprintf(message, "glCopyTexSubImage%dD(zoffset+depth)", dimensions);
-         gl_error(ctx, GL_INVALID_VALUE, message);
+         _mesa_error(ctx, GL_INVALID_VALUE, message);
+         return GL_TRUE;
+      }
+   }
+
+   compressed = is_compressed_format(ctx, teximage->IntFormat);
+   if (compressed) {
+      if (xoffset != -teximage->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glCopyTexSubImage1/2/3D(xoffset != -border");
+         return GL_TRUE;
+      }
+      if (dimensions > 1 && yoffset != -teximage->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glCopyTexSubImage2/3D(yoffset != -border");
+         return GL_TRUE;
+      }
+      if (dimensions > 2 && zoffset != -teximage->Border) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glCopyTexSubImage3D(zoffset != -border");
          return GL_TRUE;
       }
    }
@@ -1498,102 +1183,125 @@ copytexsubimage_error_check( GLcontext *ctx, GLuint dimensions,
 
 
 
-
-/*
- * Turn generic compressed formats into specific compressed format.
- * Some of the compressed formats we don't support, so we
- * fall back to the uncompressed format.  (See issue 15 of
- * the GL_ARB_texture_compression specification.)
- */
-static GLint
-get_specific_compressed_tex_format(GLcontext *ctx,
-                                   GLint ifmt, GLint numDimensions)
+void
+_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
+                   GLenum type, GLvoid *pixels )
 {
-   char message[100];
-   GLint internalFormat = ifmt;
+   const struct gl_texture_unit *texUnit;
+   const struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   GLint maxLevels = 0;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (ctx->Extensions.HaveTextureCompression
-       && ctx->Driver.SpecificCompressedTexFormat) {
-      /*
-       * First, ask the driver for the specific format.
-       */
-      switch (internalFormat) {
-         case GL_COMPRESSED_ALPHA_ARB:
-         case GL_COMPRESSED_LUMINANCE_ARB:
-         case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
-         case GL_COMPRESSED_INTENSITY_ARB:
-         case GL_COMPRESSED_RGB_ARB:
-         case GL_COMPRESSED_RGBA_ARB:
-            internalFormat = (*ctx->Driver.SpecificCompressedTexFormat)
-                                         (ctx, internalFormat, numDimensions);
-            /* XXX shouldn't we return now? */
-            break;
-         default:
-            /* silence compiler warnings */
-            ;
-      }
+   texUnit = &(ctx->Texture.Unit[ctx->Texture.CurrentUnit]);
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   if (!texObj || is_proxy_target(target)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
+      return;
    }
 
-   /*
-    * Now, convert any generic format left to an uncompressed
-    * specific format.  If the driver does not support compression
-    * of the format, we must drop back to the uncompressed format.
-    * See issue 15 of the GL_ARB_texture_compression specification.
-    */
-   switch (internalFormat) {
-      case GL_COMPRESSED_ALPHA_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_ALPHA;
-         break;
-      case GL_COMPRESSED_LUMINANCE_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_LUMINANCE;
-         break;
-      case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_LUMINANCE_ALPHA;
-         break;
-      case GL_COMPRESSED_INTENSITY_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_INTENSITY;
-         break;
-      case GL_COMPRESSED_RGB_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_RGB;
-         break;
-      case GL_COMPRESSED_RGBA_ARB:
-         if (ctx && !ctx->Extensions.HaveTextureCompression) {
-            sprintf(message, "glTexImage%dD(internalFormat)", numDimensions);
-            gl_error(ctx, GL_INVALID_VALUE, message);
-            return -1;
-         }
-         internalFormat = GL_RGBA;
-         break;
-      default:
-         /* silence compiler warning */
-         ;
+   if (target == GL_TEXTURE_1D || target == GL_TEXTURE_2D) {
+      maxLevels = ctx->Const.MaxTextureLevels;
+   }
+   else if (target == GL_TEXTURE_3D) {
+      maxLevels = ctx->Const.Max3DTextureLevels;
+   }
+   else {
+      maxLevels = ctx->Const.MaxCubeTextureLevels;
+   }
+
+   ASSERT(maxLevels > 0);
+
+   if (level < 0 || level >= maxLevels) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
+      return;
+   }
+
+   if (_mesa_sizeof_type(type) <= 0) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
+      return;
+   }
+
+   if (_mesa_components_in_format(format) <= 0 ||
+       format == GL_STENCIL_INDEX) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
+      return;
+   }
+
+   if (!ctx->Extensions.EXT_paletted_texture && is_index_format(format)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+   }
+
+   if (!ctx->Extensions.SGIX_depth_texture && format == GL_DEPTH_COMPONENT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+   }
+
+   /* XXX what if format/type doesn't match texture format/type? */
+
+   if (!pixels)
+      return;
+
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+   if (!texImage) {
+      /* invalid mipmap level, not an error */
+      return;
+   }
+
+   if (!texImage->Data) {
+      /* no image data, 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( &ctx->Unpack, pixels,
+                                                width, height, format, type,
+                                                img, row, 0);
+            assert(dest);
+
+            if (format == GL_COLOR_INDEX) {
+               GLuint indexRow[MAX_WIDTH];
+               GLint col;
+               for (col = 0; col < width; col++) {
+                  (*texImage->FetchTexel)(texImage, col, row, img,
+                                          (GLvoid *) &indexRow[col]);
+               }
+               _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->FetchTexel)(texImage, col, row, img,
+                                          (GLvoid *) &depthRow[col]);
+               }
+               _mesa_pack_depth_span(ctx, width, dest, type,
+                                     depthRow, &ctx->Pack);
+            }
+            else {
+               /* general case:  convert row to RGBA format */
+               GLchan rgba[MAX_WIDTH][4];
+               GLint col;
+               for (col = 0; col < width; col++) {
+                  (*texImage->FetchTexel)(texImage, col, row, img,
+                                          (GLvoid *) rgba[col]);
+               }
+               _mesa_pack_rgba_span(ctx, width, (const GLchan (*)[4])rgba,
+                                    format, type, dest, &ctx->Pack,
+                                    0 /* no image transfer */);
+            } /* format */
+         } /* row */
+      } /* img */
    }
-   return internalFormat;
 }
 
 
@@ -1606,118 +1314,106 @@ _mesa_TexImage1D( GLenum target, GLint level, GLint internalFormat,
                   GLsizei width, GLint border, GLenum format,
                   GLenum type, const GLvoid *pixels )
 {
-   GLsizei postConvWidth;
+   GLsizei postConvWidth = width;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage1D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   postConvWidth = width;
-   adjust_texture_size_for_convolution(ctx, 1, &postConvWidth, NULL);
+   if (is_color_format(internalFormat)) {
+      _mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
+   }
 
-   if (target==GL_TEXTURE_1D) {
+   if (target == GL_TEXTURE_1D) {
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLint ifmt;
-
-      ifmt = get_specific_compressed_tex_format(ctx, internalFormat, 1);
-      if (ifmt < 0) {
-         /*
-          * The error here is that we were sent a generic compressed
-          * format, but the extension is not supported.
-          */
-         return;
-      }
-      else {
-         internalFormat = ifmt;
-      }
 
       if (texture_error_check(ctx, target, level, internalFormat,
                               format, type, 1, postConvWidth, 1, 1, border)) {
-         return;   /* error in texture image was detected */
+         return;   /* error was recorded */
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      texObj = texUnit->CurrentD[1];
-      texImage = texObj->Image[level];
+      texObj = _mesa_select_tex_object(ctx, texUnit, target);
+      texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
          texObj->Image[level] = texImage;
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
             return;
          }
       }
       else if (texImage->Data) {
+         /* free the old texture data */
          FREE(texImage->Data);
          texImage->Data = NULL;
       }
+      clear_teximage_fields(texImage); /* not really needed, but helpful */
+      _mesa_init_teximage_fields(ctx, texImage, postConvWidth, 1, 1,
+                                 border, internalFormat);
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, postConvWidth, 1, 1, border, internalFormat);
-
-      if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-         _mesa_update_image_transfer_state(ctx);
+      if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+         _mesa_update_state(ctx);
 
-      /* process the texture image */
+      ASSERT(ctx->Driver.TexImage1D);
       if (pixels) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (!ctx->ImageTransferState && ctx->Driver.TexImage1D) {
-            /* let device driver try to use raw image */
-            success = (*ctx->Driver.TexImage1D)( ctx, target, level, format,
-                                                 type, pixels, &ctx->Unpack,
-                                                 texObj, texImage, &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            make_texture_image(ctx, 1, texImage, width, 1, 1,
-                               format, type, pixels, &ctx->Unpack);
-            if (!success && ctx->Driver.TexImage1D) {
-               /* let device driver try to use unpacked image */
-               (*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
-                                          GL_UNSIGNED_BYTE, texImage->Data,
-                                          &_mesa_native_packing,
-                                          texObj, texImage, &retain);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
+         (*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
+                                   width, border, format, type, pixels,
+                                   &ctx->Unpack, texObj, texImage);
       }
       else {
-         make_null_texture(texImage);
-         if (ctx->Driver.TexImage1D) {
-            GLboolean retain;
-            (*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
-                                       GL_UNSIGNED_BYTE, texImage->Data,
-                                       &_mesa_native_packing,
-                                       texObj, texImage, &retain);
+         GLubyte *dummy = make_null_texture(width, 1, 1, format);
+         if (dummy) {
+            (*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
+                                      width, border,
+                                      format, GL_UNSIGNED_BYTE, dummy,
+                                      &_mesa_native_packing, texObj, texImage);
+            FREE(dummy);
          }
       }
 
+      ASSERT(texImage->TexFormat);
+      if (!texImage->FetchTexel) {
+         /* If driver didn't explicitly set this, use the default */
+         texImage->FetchTexel = texImage->TexFormat->FetchTexel1D;
+      }
+      ASSERT(texImage->FetchTexel);
+
+      if (texImage->IsCompressed) {
+         ASSERT(texImage->CompressedSize > 0);
+      }
+
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
-   else if (target==GL_PROXY_TEXTURE_1D) {
+   else if (target == GL_PROXY_TEXTURE_1D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                              format, type, 1, postConvWidth, 1, 1, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                                         format, type, 1,
+                                         postConvWidth, 1, 1, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, postConvWidth, 1, 1,
+                                    border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                                  internalFormat, format, type,
+                                                  postConvWidth, 1, 1, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy1D->Image[level]);
+         if (level >= 0 && level < ctx->Const.MaxTextureLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy1D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx, ctx->Texture.Proxy1D->Image[level],
-                            width, 1, 1, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
+      _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
       return;
    }
 }
@@ -1729,39 +1425,28 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat,
                   GLenum format, GLenum type,
                   const GLvoid *pixels )
 {
-   GLsizei postConvWidth, postConvHeight;
+   GLsizei postConvWidth = width, postConvHeight = height;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage2D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   postConvWidth = width;
-   postConvHeight = height;
-   adjust_texture_size_for_convolution(ctx, 2, &postConvWidth,&postConvHeight);
+   if (is_color_format(internalFormat)) {
+      _mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth,
+                                        &postConvHeight);
+   }
 
-   if (target==GL_TEXTURE_2D ||
-       (ctx->Extensions.HaveTextureCubeMap &&
+   if (target == GL_TEXTURE_2D ||
+       (ctx->Extensions.ARB_texture_cube_map &&
         target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
         target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
+      /* non-proxy target */
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLint ifmt;
-
-      ifmt = get_specific_compressed_tex_format(ctx, internalFormat, 2);
-      if (ifmt < 0) {
-         /*
-          * The error here is that we were sent a generic compressed
-          * format, but the extension is not supported.
-          */
-         return;
-      }
-      else {
-         internalFormat = ifmt;
-      }
 
       if (texture_error_check(ctx, target, level, internalFormat,
                               format, type, 2, postConvWidth, postConvHeight,
                               1, border)) {
-         return;   /* error in texture image was detected */
+         return;   /* error was recorded */
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
@@ -1770,145 +1455,121 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat,
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
-         set_tex_image(texObj, target, level, texImage);
-         /*texObj->Image[level] = texImage;*/
+         _mesa_set_tex_image(texObj, target, level, texImage);
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
             return;
          }
       }
       else if (texImage->Data) {
+         /* free the old texture data */
          FREE(texImage->Data);
          texImage->Data = NULL;
       }
+      clear_teximage_fields(texImage); /* not really needed, but helpful */
+      _mesa_init_teximage_fields(ctx, texImage, postConvWidth, postConvHeight,
+                                 1, border, internalFormat);
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, postConvWidth, postConvHeight,
-                         1, border, internalFormat);
-
-      if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-         _mesa_update_image_transfer_state(ctx);
+      if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+         _mesa_update_state(ctx);
 
-      /* process the texture image */
+      ASSERT(ctx->Driver.TexImage2D);
       if (pixels) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (!ctx->ImageTransferState && ctx->Driver.TexImage2D) {
-            /* let device driver try to use raw image */
-            success = (*ctx->Driver.TexImage2D)( ctx, target, level, format,
-                                                 type, pixels, &ctx->Unpack,
-                                                 texObj, texImage, &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            make_texture_image(ctx, 2, texImage, width, height, 1,
-                               format, type, pixels, &ctx->Unpack);
-            if (!success && ctx->Driver.TexImage2D) {
-               /* let device driver try to use unpacked image */
-               (*ctx->Driver.TexImage2D)( ctx, target, level, texImage->Format,
-                                          GL_UNSIGNED_BYTE, texImage->Data,
-                                          &_mesa_native_packing,
-                                          texObj, texImage, &retain);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
+         (*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
+                                   width, height, border, format, type, pixels,
+                                   &ctx->Unpack, texObj, texImage);
       }
       else {
-         make_null_texture(texImage);
-         if (ctx->Driver.TexImage2D) {
-            GLboolean retain;
-            (*ctx->Driver.TexImage2D)( ctx, target, level, texImage->Format,
-                                       GL_UNSIGNED_BYTE, texImage->Data,
-                                       &_mesa_native_packing,
-                                       texObj, texImage, &retain);
+         GLubyte *dummy = make_null_texture(width, height, 1, format);
+         if (dummy) {
+            (*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
+                                      width, height, border,
+                                      format, GL_UNSIGNED_BYTE, dummy,
+                                      &_mesa_native_packing, texObj, texImage);
+            FREE(dummy);
          }
       }
 
-#define OLD_DD_TEXTURE
-#ifdef OLD_DD_TEXTURE
-      /* XXX this will be removed in the future */
-      if (ctx->Driver.TexImage) {
-         (*ctx->Driver.TexImage)( ctx, target, texObj, level, internalFormat,
-                                  texImage );
+      ASSERT(texImage->TexFormat);
+      if (!texImage->FetchTexel) {
+         /* If driver didn't explicitly set this, use the default */
+         texImage->FetchTexel = texImage->TexFormat->FetchTexel2D;
+      }
+      ASSERT(texImage->FetchTexel);
+
+      if (texImage->IsCompressed) {
+         ASSERT(texImage->CompressedSize > 0);
       }
-#endif
 
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
-   else if (target==GL_PROXY_TEXTURE_2D) {
+   else if (target == GL_PROXY_TEXTURE_2D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                          format, type, 2, postConvWidth, height, 1, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                               format, type, 2,
+                               postConvWidth, postConvHeight, 1, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, postConvWidth,
+                                    postConvHeight, 1, border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                    internalFormat, format, type,
+                                    postConvWidth, postConvHeight, 1, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy2D->Image[level]);
+         const GLint maxLevels = (target == GL_PROXY_TEXTURE_2D) ?
+            ctx->Const.MaxTextureLevels : ctx->Const.MaxCubeTextureLevels;
+         if (level >= 0 && level < maxLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy2D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx,
-                            ctx->Texture.Proxy2D->Image[level],
-                            width, height, 1, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
+      _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
       return;
    }
 }
 
 
-
 /*
  * Called by the API or display list executor.
  * Note that width and height include the border.
  */
 void
-_mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat,
+_mesa_TexImage3D( GLenum target, GLint level, GLenum internalFormat,
                   GLsizei width, GLsizei height, GLsizei depth,
                   GLint border, GLenum format, GLenum type,
                   const GLvoid *pixels )
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage3D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (target==GL_TEXTURE_3D_EXT) {
+   if (target == GL_TEXTURE_3D) {
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLint ifmt;
-
-      ifmt = get_specific_compressed_tex_format(ctx, internalFormat, 3);
-      if (ifmt < 0) {
-         /*
-          * The error here is that we were sent a generic compressed
-          * format, but the extension is not supported.
-          */
-         return;
-      }
-      else {
-         internalFormat = ifmt;
-      }
 
-      if (texture_error_check(ctx, target, level, internalFormat,
+      if (texture_error_check(ctx, target, level, (GLint) internalFormat,
                               format, type, 3, width, height, depth, border)) {
-         return;   /* error in texture image was detected */
+         return;   /* error was recorded */
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      texObj = texUnit->CurrentD[3];
-      texImage = texObj->Image[level];
+      texObj = _mesa_select_tex_object(ctx, texUnit, target);
+      texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
          texObj->Image[level] = texImage;
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
             return;
          }
       }
@@ -1916,73 +1577,72 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat,
          FREE(texImage->Data);
          texImage->Data = NULL;
       }
+      clear_teximage_fields(texImage); /* not really needed, but helpful */
+      _mesa_init_teximage_fields(ctx, texImage, width, height, depth, border,
+                                 internalFormat);
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, width, height, depth,
-                         border, internalFormat);
+      if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+         _mesa_update_state(ctx);
 
-      if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-         _mesa_update_image_transfer_state(ctx);
-
-      /* process the texture image */
+      ASSERT(ctx->Driver.TexImage3D);
       if (pixels) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (!ctx->ImageTransferState && ctx->Driver.TexImage3D) {
-            /* let device driver try to use raw image */
-            success = (*ctx->Driver.TexImage3D)( ctx, target, level, format,
-                                                 type, pixels, &ctx->Unpack,
-                                                 texObj, texImage, &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            make_texture_image(ctx, 3, texImage, width, height, depth,
-                               format, type, pixels, &ctx->Unpack);
-            if (!success && ctx->Driver.TexImage3D) {
-               /* let device driver try to use unpacked image */
-               (*ctx->Driver.TexImage3D)( ctx, target, level, texImage->Format,
-                                          GL_UNSIGNED_BYTE, texImage->Data,
-                                          &_mesa_native_packing,
-                                          texObj, texImage, &retain);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
+         (*ctx->Driver.TexImage3D)(ctx, target, level, (GLint) internalFormat,
+                                   width, height, depth, border,
+                                   format, type, pixels,
+                                   &ctx->Unpack, texObj, texImage);
       }
       else {
-         make_null_texture(texImage);
-         if (ctx->Driver.TexImage3D) {
-            GLboolean retain;
-            (*ctx->Driver.TexImage3D)( ctx, target, level, texImage->Format,
-                                       GL_UNSIGNED_BYTE, texImage->Data,
-                                       &_mesa_native_packing,
-                                       texObj, texImage, &retain);
+         GLubyte *dummy = make_null_texture(width, height, depth, format);
+         if (dummy) {
+            (*ctx->Driver.TexImage3D)(ctx, target, level,
+                                      (GLint) internalFormat,
+                                      width, height, depth, border,
+                                      format, GL_UNSIGNED_BYTE, dummy,
+                                      &_mesa_native_packing, texObj, texImage);
+            FREE(dummy);
          }
       }
 
+      ASSERT(texImage->TexFormat);
+      if (!texImage->FetchTexel) {
+         /* If driver didn't explicitly set this, use the default */
+         texImage->FetchTexel = texImage->TexFormat->FetchTexel3D;
+      }
+      ASSERT(texImage->FetchTexel);
+
+      if (texImage->IsCompressed) {
+         ASSERT(texImage->CompressedSize > 0);
+      }
+
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
-   else if (target==GL_PROXY_TEXTURE_3D) {
+   else if (target == GL_PROXY_TEXTURE_3D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                              format, type, 3, width, height, depth, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                                format, type, 3, width, height, depth, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, width, height, 1,
+                                    border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                                 internalFormat, format, type,
+                                                 width, height, depth, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy3D->Image[level]);
+         if (level >= 0 && level < ctx->Const.Max3DTextureLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy3D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx, ctx->Texture.Proxy3D->Image[level],
-                            width, height, depth, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
+      _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
       return;
    }
 }
@@ -1994,253 +1654,11 @@ _mesa_TexImage3DEXT( GLenum target, GLint level, GLenum internalFormat,
                      GLint border, GLenum format, GLenum type,
                      const GLvoid *pixels )
 {
-   _mesa_TexImage3D(target, level, (GLint) internalFormat, width, height,
+   _mesa_TexImage3D(target, level, internalFormat, width, height,
                     depth, border, format, type, pixels);
 }
 
 
-/*
- * Fetch a texture image from the device driver.
- * Store the results in the given texture object at the given mipmap level.
- */
-void
-_mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
-                                const struct gl_texture_object *texObj )
-{
-   GLvoid *image;
-   GLenum imgFormat, imgType;
-   GLboolean freeImage;
-   struct gl_texture_image *texImage;
-   GLint destComponents, numPixels, srcBytesPerTexel;
-
-   if (!ctx->Driver.GetTexImage)
-      return;
-
-   image = (*ctx->Driver.GetTexImage)( ctx, target, level, texObj,
-                                       &imgFormat, &imgType, &freeImage);
-   if (!image)
-      return;
-
-   texImage = texObj->Image[level];
-   ASSERT(texImage);
-   if (!texImage)
-      return;
-
-   destComponents = components_in_intformat(texImage->Format);
-   assert(destComponents > 0);
-   numPixels = texImage->Width * texImage->Height * texImage->Depth;
-   assert(numPixels > 0);
-   srcBytesPerTexel = _mesa_bytes_per_pixel(imgFormat, imgType);
-   assert(srcBytesPerTexel > 0);
-
-   if (!texImage->Data) {
-      /* Allocate memory for the texture image data */
-      texImage->Data = (GLubyte *) MALLOC(numPixels * destComponents + EXTRA_BYTE);
-   }
-
-   if (imgFormat == texImage->Format && imgType == GL_UNSIGNED_BYTE) {
-      /* We got lucky!  The driver's format and type match Mesa's format. */
-      if (texImage->Data) {
-         MEMCPY(texImage->Data, image, numPixels * destComponents);
-      }
-   }
-   else {
-      /* Convert the texture image from the driver's format to Mesa's
-       * internal format.
-       */
-      const GLint width = texImage->Width;
-      const GLint height = texImage->Height;
-      const GLint depth = texImage->Depth;
-      const GLint destBytesPerRow = width * destComponents * sizeof(GLchan);
-      const GLint srcBytesPerRow = width * srcBytesPerTexel;
-      const GLenum dstType = GL_UNSIGNED_BYTE;
-      const GLenum dstFormat = texImage->Format;
-      const GLubyte *srcPtr = (const GLubyte *) image;
-      GLubyte *destPtr = texImage->Data;
-
-      if (texImage->Format == GL_COLOR_INDEX) {
-         /* color index texture */
-         GLint img, row;
-         assert(imgFormat == GL_COLOR_INDEX);
-         for (img = 0; img < depth; img++) {
-            for (row = 0; row < height; row++) {
-               _mesa_unpack_index_span(ctx, width, dstType, destPtr,
-                             imgType, srcPtr, &_mesa_native_packing, GL_FALSE);
-               destPtr += destBytesPerRow;
-               srcPtr += srcBytesPerRow;
-            }
-         }
-      }
-      else {
-         /* color texture */
-         GLint img, row;
-         for (img = 0; img < depth; img++) {
-            for (row = 0; row < height; row++) {
-               _mesa_unpack_ubyte_color_span(ctx, width, dstFormat, destPtr,
-                  imgFormat, imgType, srcPtr, &_mesa_native_packing, GL_FALSE);
-               destPtr += destBytesPerRow;
-               srcPtr += srcBytesPerRow;
-            }
-         }
-      }
-   }
-
-   if (freeImage)
-      FREE(image);
-}
-
-
-void
-_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
-                   GLenum type, GLvoid *pixels )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   const struct gl_texture_unit *texUnit;
-   const struct gl_texture_object *texObj;
-   struct gl_texture_image *texImage;
-   GLboolean discardImage;
-
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetTexImage");
-
-   if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
-      gl_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
-      return;
-   }
-
-   if (_mesa_sizeof_type(type) <= 0) {
-      gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
-      return;
-   }
-
-   if (_mesa_components_in_format(format) <= 0) {
-      gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
-      return;
-   }
-
-   if (!pixels)
-      return;
-
-   texUnit = &(ctx->Texture.Unit[ctx->Texture.CurrentUnit]);
-   texObj = _mesa_select_tex_object(ctx, texUnit, target);
-   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
-   if (!texObj || !texImage) {
-      gl_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
-      return;
-   }
-
-   if (!texImage) {
-      /* invalid mipmap level */
-      return;
-   }
-
-   if (!texImage->Data) {
-      /* try to get the texture image from the device driver */
-      _mesa_get_teximage_from_driver(ctx, target, level, texObj);
-      discardImage = GL_TRUE;
-   }
-   else {
-      discardImage = GL_FALSE;
-   }
-
-   if (texImage->Data) {
-      GLint width = texImage->Width;
-      GLint height = texImage->Height;
-      GLint row;
-
-      if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-         _mesa_update_image_transfer_state(ctx);
-
-      for (row = 0; row < height; row++) {
-         /* compute destination address in client memory */
-         GLvoid *dest = _mesa_image_address( &ctx->Unpack, pixels,
-                                                width, height,
-                                                format, type, 0, row, 0);
-
-         assert(dest);
-         if (texImage->Format == GL_RGBA) {
-            const GLubyte *src = texImage->Data + row * width * 4 * sizeof(GLubyte);
-            /* XXX convolution */
-            _mesa_pack_rgba_span( ctx, width, (CONST GLubyte (*)[4]) src,
-                                  format, type, dest, &ctx->Pack,
-                                  ctx->ImageTransferState );
-         }
-         else {
-            /* fetch RGBA row from texture image then pack it in client mem */
-            GLubyte rgba[MAX_WIDTH][4];
-            GLint i;
-            const GLubyte *src;
-            switch (texImage->Format) {
-               case GL_ALPHA:
-                  src = texImage->Data + row * width * sizeof(GLubyte);
-                  for (i = 0; i < width; i++) {
-                     rgba[i][RCOMP] = 255;
-                     rgba[i][GCOMP] = 255;
-                     rgba[i][BCOMP] = 255;
-                     rgba[i][ACOMP] = src[i];
-                  }
-                  break;
-               case GL_LUMINANCE:
-                  src = texImage->Data + row * width * sizeof(GLubyte);
-                  for (i = 0; i < width; i++) {
-                     rgba[i][RCOMP] = src[i];
-                     rgba[i][GCOMP] = src[i];
-                     rgba[i][BCOMP] = src[i];
-                     rgba[i][ACOMP] = 255;
-                   }
-                  break;
-               case GL_LUMINANCE_ALPHA:
-                  src = texImage->Data + row * 2 * width * sizeof(GLubyte);
-                  for (i = 0; i < width; i++) {
-                     rgba[i][RCOMP] = src[i*2+0];
-                     rgba[i][GCOMP] = src[i*2+0];
-                     rgba[i][BCOMP] = src[i*2+0];
-                     rgba[i][ACOMP] = src[i*2+1];
-                  }
-                  break;
-               case GL_INTENSITY:
-                  src = texImage->Data + row * width * sizeof(GLubyte);
-                  for (i = 0; i < width; i++) {
-                     rgba[i][RCOMP] = src[i];
-                     rgba[i][GCOMP] = src[i];
-                     rgba[i][BCOMP] = src[i];
-                     rgba[i][ACOMP] = 255;
-                  }
-                  break;
-               case GL_RGB:
-                  src = texImage->Data + row * 3 * width * sizeof(GLubyte);
-                  for (i = 0; i < width; i++) {
-                     rgba[i][RCOMP] = src[i*3+0];
-                     rgba[i][GCOMP] = src[i*3+1];
-                     rgba[i][BCOMP] = src[i*3+2];
-                     rgba[i][ACOMP] = 255;
-                  }
-                  break;
-               case GL_RGBA:
-                  /* this special case should have been handled above! */
-                  gl_problem( ctx, "error 1 in gl_GetTexImage" );
-                  break;
-               case GL_COLOR_INDEX:
-                  gl_problem( ctx, "GL_COLOR_INDEX not implemented in gl_GetTexImage" );
-                  break;
-               default:
-                  gl_problem( ctx, "bad format in gl_GetTexImage" );
-            }
-            /* XXX convolution */
-            _mesa_pack_rgba_span( ctx, width, (const GLubyte (*)[4])rgba,
-                                  format, type, dest, &ctx->Pack,
-                                  ctx->ImageTransferState );
-         }
-      }
-
-      /* if we got the teximage from the device driver we'll discard it now */
-      if (discardImage) {
-         FREE(texImage->Data);
-         texImage->Data = NULL;
-      }
-   }
-}
-
-
 
 void
 _mesa_TexSubImage1D( GLenum target, GLint level,
@@ -2248,15 +1666,20 @@ _mesa_TexSubImage1D( GLenum target, GLint level,
                      GLenum format, GLenum type,
                      const GLvoid *pixels )
 {
-   GET_CURRENT_CONTEXT(ctx);
+   GLsizei postConvWidth = width;
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
-   GLsizei postConvWidth;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   postConvWidth = width;
-   adjust_texture_size_for_convolution(ctx, 1, &postConvWidth, NULL);
+   /* XXX should test internal format */
+   if (is_color_format(format)) {
+      _mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
+   }
 
    if (subtexture_error_check(ctx, 1, target, level, xoffset, 0, 0,
                               postConvWidth, 1, 1, format, type)) {
@@ -2264,50 +1687,21 @@ _mesa_TexSubImage1D( GLenum target, GLint level,
    }
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-   texObj = texUnit->CurrentD[1];
-   texImage = texObj->Image[level];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || !pixels)
       return;  /* no-op, not an error */
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
-
-   if (!ctx->ImageTransferState && ctx->Driver.TexSubImage1D) {
-      success = (*ctx->Driver.TexSubImage1D)( ctx, target, level, xoffset,
-                                              width, format, type, pixels,
-                                              &ctx->Unpack, texObj, texImage );
-   }
-   if (!success) {
-      /* XXX if Driver.TexSubImage1D, unpack image and try again? */
-      GLboolean retain = GL_TRUE;
-      if (!texImage->Data) {
-         _mesa_get_teximage_from_driver( ctx, target, level, texObj );
-         if (!texImage->Data) {
-            make_null_texture(texImage);
-         }
-         if (!texImage->Data)
-            return;  /* we're really out of luck! */
-      }
-
-      fill_texture_image(ctx, 1, texImage->Format, texImage->Data,
-                         width, 1, 1, xoffset, 0, 0, /* size and offsets */
-                         0, 0, /* strides */
-                         format, type, pixels, &ctx->Unpack);
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
 
-      if (ctx->Driver.TexImage1D) {
-         (*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
-                                    GL_UNSIGNED_BYTE, texImage->Data,
-                                    &_mesa_native_packing, texObj, texImage,
-                                    &retain );
-      }
-
-      if (!retain && texImage->Data) {
-         FREE(texImage->Data);
-         texImage->Data = NULL;
-      }
-   }
+   ASSERT(ctx->Driver.TexSubImage1D);
+   (*ctx->Driver.TexSubImage1D)(ctx, target, level, xoffset, width,
+                                format, type, pixels, &ctx->Unpack,
+                                texObj, texImage);
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2318,16 +1712,21 @@ _mesa_TexSubImage2D( GLenum target, GLint level,
                      GLenum format, GLenum type,
                      const GLvoid *pixels )
 {
-   GET_CURRENT_CONTEXT(ctx);
+   GLsizei postConvWidth = width, postConvHeight = height;
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
-   GLsizei postConvWidth, postConvHeight;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   postConvWidth = width;
-   postConvHeight = height;
-   adjust_texture_size_for_convolution(ctx, 2, &postConvWidth,&postConvHeight);
+   /* XXX should test internal format */
+   if (is_color_format(format)) {
+      _mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth,
+                                         &postConvHeight);
+   }
 
    if (subtexture_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
                              postConvWidth, postConvHeight, 1, format, type)) {
@@ -2336,65 +1735,21 @@ _mesa_TexSubImage2D( GLenum target, GLint level,
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    texObj = _mesa_select_tex_object(ctx, texUnit, target);
-   texImage = texObj->Image[level];
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || height == 0 || !pixels)
       return;  /* no-op, not an error */
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
-
-   if (!ctx->ImageTransferState && ctx->Driver.TexSubImage2D) {
-      success = (*ctx->Driver.TexSubImage2D)( ctx, target, level, xoffset,
-                                     yoffset, width, height, format, type,
-                                     pixels, &ctx->Unpack, texObj, texImage );
-   }
-   if (!success) {
-      /* XXX if Driver.TexSubImage2D, unpack image and try again? */
-      const GLint texComps = components_in_intformat(texImage->Format);
-      const GLint texRowStride = texImage->Width * texComps * sizeof(GLubyte);
-      GLboolean retain = GL_TRUE;
-
-      if (!texImage->Data) {
-         _mesa_get_teximage_from_driver( ctx, target, level, texObj );
-         if (!texImage->Data) {
-            make_null_texture(texImage);
-         }
-         if (!texImage->Data)
-            return;  /* we're really out of luck! */
-      }
-
-      fill_texture_image(ctx, 2, texImage->Format, texImage->Data,
-                         width, height, 1, xoffset, yoffset, 0,
-                         texRowStride, 0,
-                         format, type, pixels, &ctx->Unpack);
-
-      if (ctx->Driver.TexImage2D) {
-         (*ctx->Driver.TexImage2D)(ctx, target, level, texImage->Format,
-                                   GL_UNSIGNED_BYTE, texImage->Data,
-                                   &_mesa_native_packing, texObj, texImage,
-                                   &retain);
-      }
-
-      if (!retain && texImage->Data) {
-         FREE(texImage->Data);
-         texImage->Data = NULL;
-      }
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
+   yoffset += texImage->Border;
 
-#ifdef OLD_DD_TEXTURE
-      /* XXX this will be removed in the future */
-      if (ctx->Driver.TexSubImage) {
-         (*ctx->Driver.TexSubImage)(ctx, target, texObj, level,
-                                    xoffset, yoffset, width, height,
-                                    texImage->IntFormat, texImage);
-      }
-      else if (ctx->Driver.TexImage) {
-         (*ctx->Driver.TexImage)(ctx, GL_TEXTURE_2D, texObj,
-                                 level, texImage->IntFormat, texImage );
-      }
-#endif
-   }
+   ASSERT(ctx->Driver.TexSubImage2D);
+   (*ctx->Driver.TexSubImage2D)(ctx, target, level, xoffset, yoffset,
+                                width, height, format, type, pixels,
+                                &ctx->Unpack, texObj, texImage);
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2406,11 +1761,14 @@ _mesa_TexSubImage3D( GLenum target, GLint level,
                      GLenum format, GLenum type,
                      const GLvoid *pixels )
 {
-   GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
    if (subtexture_error_check(ctx, 3, target, level, xoffset, yoffset, zoffset,
                               width, height, depth, format, type)) {
@@ -2418,94 +1776,25 @@ _mesa_TexSubImage3D( GLenum target, GLint level,
    }
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-   texObj = texUnit->CurrentD[3];
-   texImage = texObj->Image[level];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || height == 0 || height == 0 || !pixels)
       return;  /* no-op, not an error */
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
-
-   if (!ctx->ImageTransferState && ctx->Driver.TexSubImage3D) {
-      success = (*ctx->Driver.TexSubImage3D)( ctx, target, level, xoffset,
-                                yoffset, zoffset, width, height, depth, format,
-                                type, pixels, &ctx->Unpack, texObj, texImage );
-   }
-   if (!success) {
-      /* XXX if Driver.TexSubImage3D, unpack image and try again? */
-      const GLint texComps = components_in_intformat(texImage->Format);
-      const GLint texRowStride = texImage->Width * texComps * sizeof(GLubyte);
-      const GLint texImgStride = texRowStride * texImage->Height;
-      GLboolean retain = GL_TRUE;
-
-      if (!texImage->Data) {
-         _mesa_get_teximage_from_driver( ctx, target, level, texObj );
-         if (!texImage->Data) {
-            make_null_texture(texImage);
-         }
-         if (!texImage->Data)
-            return;  /* we're really out of luck! */
-      }
-
-      fill_texture_image(ctx, 3, texImage->Format, texImage->Data,
-                         width, height, depth, xoffset, yoffset, zoffset,
-                         texRowStride, texImgStride,
-                         format, type, pixels, &ctx->Unpack);
-
-      if (ctx->Driver.TexImage3D) {
-         (*ctx->Driver.TexImage3D)(ctx, target, level, texImage->Format,
-                                   GL_UNSIGNED_BYTE, texImage->Data,
-                                   &_mesa_native_packing, texObj, texImage,
-                                   &retain);
-      }
-
-      if (!retain && texImage->Data) {
-         FREE(texImage->Data);
-         texImage->Data = NULL;
-      }
-   }
-}
-
-
-
-/*
- * 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, GLubyte data.
- */
-static GLubyte *
-read_color_image( GLcontext *ctx, GLint x, GLint y,
-                  GLsizei width, GLsizei height )
-{
-   GLint stride, i;
-   GLubyte *image, *dst;
-
-   image = (GLubyte *) MALLOC(width * height * 4 * sizeof(GLubyte));
-   if (!image)
-      return NULL;
-
-   /* Select buffer to read from */
-   (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
-                                 ctx->Pixel.DriverReadBuffer );
-
-   dst = image;
-   stride = width * 4 * sizeof(GLubyte);
-   for (i = 0; i < height; i++) {
-      gl_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
-                         (GLubyte (*)[4]) dst );
-      dst += stride;
-   }
-
-   /* Read from draw buffer (the default) */
-   (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
-                                 ctx->Color.DriverDrawBuffer );
-
-   return image;
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
+   yoffset += texImage->Border;
+   zoffset += texImage->Border;
+
+   ASSERT(ctx->Driver.TexSubImage3D);
+   (*ctx->Driver.TexSubImage3D)(ctx, target, level,
+                                xoffset, yoffset, zoffset,
+                                width, height, depth,
+                                format, type, pixels,
+                                &ctx->Unpack, texObj, texImage );
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2516,37 +1805,60 @@ _mesa_CopyTexImage1D( GLenum target, GLint level,
                       GLint x, GLint y,
                       GLsizei width, GLint border )
 {
+   struct gl_texture_unit *texUnit;
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   GLsizei postConvWidth = width;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage1D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (copytexture_error_check(ctx, 1, target, level, internalFormat,
-                               width, 1, border))
-      return;
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
+   if (is_color_format(internalFormat)) {
+      _mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
+   }
 
-   if (ctx->ImageTransferState || !ctx->Driver.CopyTexImage1D 
-       || !(*ctx->Driver.CopyTexImage1D)(ctx, target, level,
-                         internalFormat, x, y, width, border)) {
-      struct gl_pixelstore_attrib unpackSave;
+   if (copytexture_error_check(ctx, 1, target, level, internalFormat,
+                               postConvWidth, 1, border))
+      return;
 
-      /* get image from framebuffer */
-      GLubyte *image = read_color_image( ctx, x, y, width, 1 );
-      if (!image) {
-         gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+   if (!texImage) {
+      texImage = _mesa_alloc_texture_image();
+      _mesa_set_tex_image(texObj, target, level, texImage);
+      if (!texImage) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
          return;
       }
+   }
+   else if (texImage->Data) {
+      /* free the old texture data */
+      FREE(texImage->Data);
+      texImage->Data = NULL;
+   }
 
-      /* call glTexImage1D to redefine the texture */
-      unpackSave = ctx->Unpack;
-      ctx->Unpack = _mesa_native_packing;
-      (*ctx->Exec->TexImage1D)( target, level, internalFormat, width,
-                                border, GL_RGBA, GL_UNSIGNED_BYTE, image );
-      ctx->Unpack = unpackSave;
+   clear_teximage_fields(texImage); /* not really needed, but helpful */
+   _mesa_init_teximage_fields(ctx, texImage, postConvWidth, 1, 1,
+                              border, internalFormat);
 
-      FREE(image);
+
+   ASSERT(ctx->Driver.CopyTexImage1D);
+   (*ctx->Driver.CopyTexImage1D)(ctx, target, level, internalFormat,
+                                 x, y, width, border);
+
+   ASSERT(texImage->TexFormat);
+   if (!texImage->FetchTexel) {
+      /* If driver didn't explicitly set this, use the default */
+      texImage->FetchTexel = texImage->TexFormat->FetchTexel1D;
    }
+   ASSERT(texImage->FetchTexel);
+
+   /* state update */
+   texObj->Complete = GL_FALSE;
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2556,37 +1868,60 @@ _mesa_CopyTexImage2D( 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;
+   GLsizei postConvWidth = width, postConvHeight = height;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage2D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (copytexture_error_check(ctx, 2, target, level, internalFormat,
-                               width, height, border))
-      return;
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
+   if (is_color_format(internalFormat)) {
+      _mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth,
+                                         &postConvHeight);
+   }
 
-   if (ctx->ImageTransferState || !ctx->Driver.CopyTexImage2D
-       || !(*ctx->Driver.CopyTexImage2D)(ctx, target, level,
-                         internalFormat, x, y, width, height, border)) {
-      struct gl_pixelstore_attrib unpackSave;
+   if (copytexture_error_check(ctx, 2, target, level, internalFormat,
+                               postConvWidth, postConvHeight, border))
+      return;
 
-      /* get image from framebuffer */
-      GLubyte *image = read_color_image( ctx, x, y, width, height );
-      if (!image) {
-         gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+   if (!texImage) {
+      texImage = _mesa_alloc_texture_image();
+      _mesa_set_tex_image(texObj, target, level, texImage);
+      if (!texImage) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
          return;
       }
+   }
+   else if (texImage->Data) {
+      /* free the old texture data */
+      FREE(texImage->Data);
+      texImage->Data = NULL;
+   }
+
+   clear_teximage_fields(texImage); /* not really needed, but helpful */
+   _mesa_init_teximage_fields(ctx, texImage, postConvWidth, postConvHeight, 1,
+                              border, internalFormat);
 
-      /* call glTexImage2D to redefine the texture */
-      unpackSave = ctx->Unpack;
-      ctx->Unpack = _mesa_native_packing;
-      (ctx->Exec->TexImage2D)( target, level, internalFormat, width,
-                      height, border, GL_RGBA, GL_UNSIGNED_BYTE, image );
-      ctx->Unpack = unpackSave;
+   ASSERT(ctx->Driver.CopyTexImage2D);
+   (*ctx->Driver.CopyTexImage2D)(ctx, target, level, internalFormat,
+                                 x, y, width, height, border);
 
-      FREE(image);
+   ASSERT(texImage->TexFormat);
+   if (!texImage->FetchTexel) {
+      /* If driver didn't explicitly set this, use the default */
+      texImage->FetchTexel = texImage->TexFormat->FetchTexel2D;
    }
+   ASSERT(texImage->FetchTexel);
+
+   /* state update */
+   texObj->Complete = GL_FALSE;
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2595,44 +1930,33 @@ void
 _mesa_CopyTexSubImage1D( 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;
+   GLsizei postConvWidth = width;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage1D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (copytexsubimage_error_check(ctx, 1, target, level,
-                                   xoffset, 0, 0, width, 1))
-      return;
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
+   /* XXX should test internal format */
+   _mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
 
-   if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage1D
-       || !(*ctx->Driver.CopyTexSubImage1D)(ctx, target, level,
-                                            xoffset, x, y, width)) {
-      struct gl_texture_unit *texUnit;
-      struct gl_texture_image *teximage;
-      struct gl_pixelstore_attrib unpackSave;
-      GLubyte *image;
+   if (copytexsubimage_error_check(ctx, 1, target, level,
+                                   xoffset, 0, 0, postConvWidth, 1))
+      return;
 
-      texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      teximage = texUnit->CurrentD[1]->Image[level];
-      assert(teximage);
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
-      /* get image from frame buffer */
-      image = read_color_image(ctx, x, y, width, 1);
-      if (!image) {
-         gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
-         return;
-      }
-      
-      /* now call glTexSubImage1D to do the real work */
-      unpackSave = ctx->Unpack;
-      ctx->Unpack = _mesa_native_packing;
-      _mesa_TexSubImage1D(target, level, xoffset, width,
-                          GL_RGBA, GL_UNSIGNED_BYTE, image);
-      ctx->Unpack = unpackSave;
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
 
-      FREE(image);
-   }
+   ASSERT(ctx->Driver.CopyTexSubImage1D);
+   (*ctx->Driver.CopyTexSubImage1D)(ctx, target, level, xoffset, x, y, width);
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2642,44 +1966,35 @@ _mesa_CopyTexSubImage2D( 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;
+   GLsizei postConvWidth = width, postConvHeight = height;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage2D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (copytexsubimage_error_check(ctx, 2, target, level,
-                                   xoffset, yoffset, 0, width, height))
-      return;
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
+   /* XXX should test internal format */
+   _mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth, &postConvHeight);
 
-   if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage2D
-       || !(*ctx->Driver.CopyTexSubImage2D)(ctx, target, level,
-                                xoffset, yoffset, x, y, width, height )) {
-      struct gl_texture_unit *texUnit;
-      struct gl_texture_image *teximage;
-      struct gl_pixelstore_attrib unpackSave;
-      GLubyte *image;
+   if (copytexsubimage_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
+                                   postConvWidth, postConvHeight))
+      return;
 
-      texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      teximage = texUnit->CurrentD[2]->Image[level];
-      assert(teximage);
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
-      /* get image from frame buffer */
-      image = read_color_image(ctx, x, y, width, height);
-      if (!image) {
-         gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
-         return;
-      }
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
+   yoffset += texImage->Border;
 
-      /* now call glTexSubImage2D to do the real work */
-      unpackSave = ctx->Unpack;
-      ctx->Unpack = _mesa_native_packing;
-      _mesa_TexSubImage2D(target, level, xoffset, yoffset, width, height,
-                          GL_RGBA, GL_UNSIGNED_BYTE, image);
-      ctx->Unpack = unpackSave;
-      
-      FREE(image);
-   }
+   ASSERT(ctx->Driver.CopyTexSubImage2D);
+   (*ctx->Driver.CopyTexSubImage2D)(ctx, target, level,
+                                    xoffset, yoffset, x, y, width, height);
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2689,44 +2004,37 @@ _mesa_CopyTexSubImage3D( 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;
+   GLsizei postConvWidth = width, postConvHeight = height;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage3D");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (copytexsubimage_error_check(ctx, 3, target, level,
-                    xoffset, yoffset, zoffset, width, height))
-      return;
+   if (ctx->NewState & _IMAGE_NEW_TRANSFER_STATE)
+      _mesa_update_state(ctx);
 
-   if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
-      _mesa_update_image_transfer_state(ctx);
+   /* XXX should test internal format */
+   _mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth, &postConvHeight);
 
-   if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage3D
-       || !(*ctx->Driver.CopyTexSubImage3D)(ctx, target, level,
-                     xoffset, yoffset, zoffset, x, y, width, height )) {
-      struct gl_texture_unit *texUnit;
-      struct gl_texture_image *teximage;
-      struct gl_pixelstore_attrib unpackSave;
-      GLubyte *image;
+   if (copytexsubimage_error_check(ctx, 3, target, level, xoffset, yoffset,
+                                   zoffset, postConvWidth, postConvHeight))
+      return;
 
-      texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      teximage = texUnit->CurrentD[3]->Image[level];
-      assert(teximage);
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
-      /* get image from frame buffer */
-      image = read_color_image(ctx, x, y, width, height);
-      if (!image) {
-         gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
-         return;
-      }
+   /* If we have a border, xoffset=-1 is legal.  Bias by border width */
+   xoffset += texImage->Border;
+   yoffset += texImage->Border;
+   zoffset += texImage->Border;
 
-      /* now call glTexSubImage2D to do the real work */
-      unpackSave = ctx->Unpack;
-      ctx->Unpack = _mesa_native_packing;
-      _mesa_TexSubImage3D(target, level, xoffset, yoffset, zoffset,
-                          width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE, image);
-      ctx->Unpack = unpackSave;
-      
-      FREE(image);
-   }
+   ASSERT(ctx->Driver.CopyTexSubImage3D);
+   (*ctx->Driver.CopyTexSubImage3D)(ctx, target, level,
+                                    xoffset, yoffset, zoffset,
+                                    x, y, width, height);
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -2738,7 +2046,7 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level,
                               const GLvoid *data)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage1DARB");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    switch (internalFormat) {
       case GL_COMPRESSED_ALPHA_ARB:
@@ -2747,7 +2055,7 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level,
       case GL_COMPRESSED_INTENSITY_ARB:
       case GL_COMPRESSED_RGB_ARB:
       case GL_COMPRESSED_RGBA_ARB:
-         gl_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage1DARB");
+         _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage1DARB");
          return;
       default:
          /* silence compiler warning */
@@ -2758,7 +2066,6 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level,
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLsizei computedImageSize;
 
       if (texture_error_check(ctx, target, level, internalFormat,
                               GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
@@ -2766,14 +2073,14 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level,
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      texObj = texUnit->CurrentD[1];
-      texImage = texObj->Image[level];
+      texObj = _mesa_select_tex_object(ctx, texUnit, target);
+      texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
          texObj->Image[level] = texImage;
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage1DARB");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage1DARB");
             return;
          }
       }
@@ -2782,71 +2089,47 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level,
          texImage->Data = NULL;
       }
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, width, 1, 1,
-                         border, internalFormat);
+      _mesa_init_teximage_fields(ctx, texImage, width, 1, 1,
+                                 border, internalFormat);
 
-      /* process the texture image */
-      if (data) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (ctx->Driver.CompressedTexImage1D) {
-            success = (*ctx->Driver.CompressedTexImage1D)(ctx, target, level,
-                               imageSize, data, texObj, texImage, &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            computedImageSize = _mesa_compressed_image_size(ctx,
-                                                        internalFormat,
-                                                        1,    /* num dims */
-                                                        width,
-                                                        1,    /* height   */
-                                                        1);   /* depth    */
-            if (computedImageSize != imageSize) {
-                gl_error(ctx, GL_INVALID_VALUE, "glCompressedTexImage1DARB(imageSize)");
-                return;
-            }
-            texImage->Data = MALLOC(computedImageSize);
-            if (texImage->Data) {
-               MEMCPY(texImage->Data, data, computedImageSize);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
-      }
-      else {
-         make_null_texture(texImage);
-         if (ctx->Driver.CompressedTexImage1D) {
-            GLboolean retain;
-            (*ctx->Driver.CompressedTexImage1D)(ctx, target, level, 0,
-                                                texImage->Data, texObj,
-                                                texImage, &retain);
-         }
+      if (ctx->Extensions.ARB_texture_compression) {
+         ASSERT(ctx->Driver.CompressedTexImage1D);
+         (*ctx->Driver.CompressedTexImage1D)(ctx, target, level,
+                                             internalFormat, width, border,
+                                             imageSize, data,
+                                             texObj, texImage);
+         ASSERT(texImage->CompressedSize > 0); /* sanity */
       }
 
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
    else if (target == GL_PROXY_TEXTURE_1D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                              GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                                    GL_NONE, GL_NONE, 1, width, 1, 1, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, width, 1, 1,
+                                    border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                             internalFormat, GL_NONE, GL_NONE,
+                                             width, 1, 1, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy1D->Image[level]);
+         if (level >= 0 && level < ctx->Const.MaxTextureLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy1D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx, ctx->Texture.Proxy1D->Image[level],
-                            width, 1, 1, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage1DARB(target)" );
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage1DARB(target)");
       return;
    }
 }
@@ -2859,7 +2142,7 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level,
                               const GLvoid *data)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage2DARB");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    switch (internalFormat) {
       case GL_COMPRESSED_ALPHA_ARB:
@@ -2868,21 +2151,20 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level,
       case GL_COMPRESSED_INTENSITY_ARB:
       case GL_COMPRESSED_RGB_ARB:
       case GL_COMPRESSED_RGBA_ARB:
-         gl_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage2DARB");
+         _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage2DARB");
          return;
       default:
          /* silence compiler warning */
          ;
    }
 
-   if (target==GL_TEXTURE_2D ||
-       (ctx->Extensions.HaveTextureCubeMap &&
+   if (target == GL_TEXTURE_2D ||
+       (ctx->Extensions.ARB_texture_cube_map &&
         target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
         target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLsizei computedImageSize;
 
       if (texture_error_check(ctx, target, level, internalFormat,
                               GL_NONE, GL_NONE, 1, width, height, 1, border)) {
@@ -2890,14 +2172,14 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level,
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      texObj = texUnit->CurrentD[2];
-      texImage = texObj->Image[level];
+      texObj = _mesa_select_tex_object(ctx, texUnit, target);
+      texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
          texObj->Image[level] = texImage;
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage2DARB");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage2DARB");
             return;
          }
       }
@@ -2906,76 +2188,49 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level,
          texImage->Data = NULL;
       }
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, width, height, 1, border, internalFormat);
-
-      /* process the texture image */
-      if (data) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (ctx->Driver.CompressedTexImage2D) {
-            success = (*ctx->Driver.CompressedTexImage2D)( ctx,
-                                                           target,
-                                                           level,
-                                                           imageSize,
-                                                           data,
-                                                           texObj,
-                                                           texImage,
-                                                           &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            computedImageSize = _mesa_compressed_image_size(ctx,
-                                                           internalFormat,
-                                                           2,    /* num dims */
-                                                           width,
-                                                           height,
-                                                           1);   /* depth    */
-            if (computedImageSize != imageSize) {
-                gl_error(ctx, GL_INVALID_VALUE, "glCompressedTexImage2DARB(imageSize)");
-                return;
-            }
-            texImage->Data = MALLOC(computedImageSize);
-            if (texImage->Data) {
-               MEMCPY(texImage->Data, data, computedImageSize);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
-      }
-      else {
-         make_null_texture(texImage);
-         if (ctx->Driver.CompressedTexImage2D) {
-            GLboolean retain;
-            (*ctx->Driver.CompressedTexImage2D)( ctx, target, level, 0,
-                                                 texImage->Data, texObj,
-                                                 texImage, &retain);
-         }
+      _mesa_init_teximage_fields(ctx, texImage, width, height, 1, border,
+                                 internalFormat);
+
+      if (ctx->Extensions.ARB_texture_compression) {
+         ASSERT(ctx->Driver.CompressedTexImage2D);
+         (*ctx->Driver.CompressedTexImage2D)(ctx, target, level,
+                                             internalFormat, width, height,
+                                             border, imageSize, data,
+                                             texObj, texImage);
+         ASSERT(texImage->CompressedSize > 0); /* sanity */
       }
 
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
    else if (target == GL_PROXY_TEXTURE_2D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                              GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                                GL_NONE, GL_NONE, 2, width, height, 1, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, width, height, 1,
+                                    border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                              internalFormat, GL_NONE, GL_NONE,
+                                              width, height, 1, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy2D->Image[level]);
+         const GLint maxLevels = (target == GL_PROXY_TEXTURE_2D) ?
+            ctx->Const.MaxTextureLevels : ctx->Const.MaxCubeTextureLevels;
+         if (level >= 0 && level < maxLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy2D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx, ctx->Texture.Proxy2D->Image[level],
-                            width, 1, 1, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage2DARB(target)" );
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage2DARB(target)");
       return;
    }
 }
@@ -2988,7 +2243,7 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level,
                               GLsizei imageSize, const GLvoid *data)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage3DARB");
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    switch (internalFormat) {
       case GL_COMPRESSED_ALPHA_ARB:
@@ -2997,7 +2252,7 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level,
       case GL_COMPRESSED_INTENSITY_ARB:
       case GL_COMPRESSED_RGB_ARB:
       case GL_COMPRESSED_RGBA_ARB:
-         gl_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage3DARB");
+         _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage3DARB");
          return;
       default:
          /* silence compiler warning */
@@ -3008,7 +2263,6 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level,
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
       struct gl_texture_image *texImage;
-      GLsizei computedImageSize;
 
       if (texture_error_check(ctx, target, level, internalFormat,
                           GL_NONE, GL_NONE, 1, width, height, depth, border)) {
@@ -3016,14 +2270,14 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level,
       }
 
       texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
-      texObj = texUnit->CurrentD[3];
-      texImage = texObj->Image[level];
+      texObj = _mesa_select_tex_object(ctx, texUnit, target);
+      texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
 
       if (!texImage) {
          texImage = _mesa_alloc_texture_image();
          texObj->Image[level] = texImage;
          if (!texImage) {
-            gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage3DARB");
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage3DARB");
             return;
          }
       }
@@ -3032,73 +2286,48 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level,
          texImage->Data = NULL;
       }
 
-      /* setup the teximage struct's fields */
-      init_texture_image(ctx, texImage, width, height, depth,
-                         border, internalFormat);
+      _mesa_init_teximage_fields(ctx, texImage, width, height, depth, border,
+                                 internalFormat);
 
-      /* process the texture image */
-      if (data) {
-         GLboolean retain = GL_TRUE;
-         GLboolean success = GL_FALSE;
-         if (ctx->Driver.CompressedTexImage3D) {
-            success = (*ctx->Driver.CompressedTexImage3D)(ctx, target, level,
-                                                          imageSize, data,
-                                                          texObj, texImage,
-                                                          &retain);
-         }
-         if (retain || !success) {
-            /* make internal copy of the texture image */
-            computedImageSize = _mesa_compressed_image_size(ctx,
-                                                            internalFormat,
-                                                            3,  /* num dims */
-                                                            width,
-                                                            height,
-                                                            depth);
-            if (computedImageSize != imageSize) {
-                gl_error(ctx, GL_INVALID_VALUE, "glCompressedTexImage3DARB(imageSize)");
-                return;
-            }
-            texImage->Data = MALLOC(computedImageSize);
-            if (texImage->Data) {
-               MEMCPY(texImage->Data, data, computedImageSize);
-            }
-         }
-         if (!retain && texImage->Data) {
-            FREE(texImage->Data);
-            texImage->Data = NULL;
-         }
-      }
-      else {
-         make_null_texture(texImage);
-         if (ctx->Driver.CompressedTexImage3D) {
-            GLboolean retain;
-            (*ctx->Driver.CompressedTexImage3D)( ctx, target, level, 0,
-                                                 texImage->Data, texObj,
-                                                 texImage, &retain);
-         }
+      if (ctx->Extensions.ARB_texture_compression) {
+         ASSERT(ctx->Driver.CompressedTexImage3D);
+         (*ctx->Driver.CompressedTexImage3D)(ctx, target, level,
+                                             internalFormat,
+                                             width, height, depth,
+                                             border, imageSize, data,
+                                             texObj, texImage);
+         ASSERT(texImage->CompressedSize > 0); /* sanity */
       }
 
       /* state update */
-      gl_put_texobj_on_dirty_list( ctx, texObj );
-      ctx->NewState |= NEW_TEXTURING;
+      texObj->Complete = GL_FALSE;
+      ctx->NewState |= _NEW_TEXTURE;
    }
    else if (target == GL_PROXY_TEXTURE_3D) {
       /* Proxy texture: check for errors and update proxy state */
-      if (texture_error_check(ctx, target, level, internalFormat,
-                          GL_NONE, GL_NONE, 1, width, height, depth, border)) {
+      GLenum error = texture_error_check(ctx, target, level, internalFormat,
+                            GL_NONE, GL_NONE, 1, width, height, depth, border);
+      if (!error) {
+         struct gl_texture_unit *texUnit;
+         struct gl_texture_image *texImage;
+         texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+         texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
+         _mesa_init_teximage_fields(ctx, texImage, width, height, depth,
+                                    border, internalFormat);
+         ASSERT(ctx->Driver.TestProxyTexImage);
+         error = !(*ctx->Driver.TestProxyTexImage)(ctx, target, level,
+                                             internalFormat, GL_NONE, GL_NONE,
+                                             width, height, depth, border);
+      }
+      if (error) {
          /* if error, clear all proxy texture image parameters */
-         if (level>=0 && level<ctx->Const.MaxTextureLevels) {
-            clear_proxy_teximage(ctx->Texture.Proxy3D->Image[level]);
+         if (level >= 0 && level < ctx->Const.Max3DTextureLevels) {
+            clear_teximage_fields(ctx->Texture.Proxy3D->Image[level]);
          }
       }
-      else {
-         /* if no error, update proxy texture image parameters */
-         init_texture_image(ctx, ctx->Texture.Proxy3D->Image[level],
-                            width, 1, 1, border, internalFormat);
-      }
    }
    else {
-      gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage3DARB(target)" );
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCompressedTexImage3DARB(target)");
       return;
    }
 }
@@ -3109,11 +2338,11 @@ _mesa_CompressedTexSubImage1DARB(GLenum target, GLint level, GLint xoffset,
                                  GLsizei width, GLenum format,
                                  GLsizei imageSize, const GLvoid *data)
 {
-   GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    if (subtexture_error_check(ctx, 1, target, level, xoffset, 0, 0,
                               width, 1, 1, format, GL_NONE)) {
@@ -3122,21 +2351,19 @@ _mesa_CompressedTexSubImage1DARB(GLenum target, GLint level, GLint xoffset,
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    texObj = _mesa_select_tex_object(ctx, texUnit, target);
-   texImage = texObj->Image[level];
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || !data)
       return;  /* no-op, not an error */
 
    if (ctx->Driver.CompressedTexSubImage1D) {
-      success = (*ctx->Driver.CompressedTexSubImage1D)(ctx, target, level,
-                   xoffset, width, format, imageSize, data, texObj, texImage);
-   }
-   if (!success) {
-      /* XXX what else can we do? */
-      gl_problem(ctx, "glCompressedTexSubImage1DARB failed!");
-      return;
+      (*ctx->Driver.CompressedTexSubImage1D)(ctx, target, level,
+                                             xoffset, width,
+                                             format, imageSize, data,
+                                             texObj, texImage);
    }
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -3146,11 +2373,11 @@ _mesa_CompressedTexSubImage2DARB(GLenum target, GLint level, GLint xoffset,
                                  GLenum format, GLsizei imageSize,
                                  const GLvoid *data)
 {
-   GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    if (subtexture_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
                               width, height, 1, format, GL_NONE)) {
@@ -3159,22 +2386,19 @@ _mesa_CompressedTexSubImage2DARB(GLenum target, GLint level, GLint xoffset,
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    texObj = _mesa_select_tex_object(ctx, texUnit, target);
-   texImage = texObj->Image[level];
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || height == 0 || !data)
       return;  /* no-op, not an error */
 
    if (ctx->Driver.CompressedTexSubImage2D) {
-      success = (*ctx->Driver.CompressedTexSubImage2D)(ctx, target, level,
-                                       xoffset, yoffset, width, height, format,
-                                       imageSize, data, texObj, texImage);
-   }
-   if (!success) {
-      /* XXX what else can we do? */
-      gl_problem(ctx, "glCompressedTexSubImage2DARB failed!");
-      return;
+      (*ctx->Driver.CompressedTexSubImage2D)(ctx, target, level,
+                                             xoffset, yoffset, width, height,
+                                             format, imageSize, data,
+                                             texObj, texImage);
    }
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
@@ -3184,11 +2408,11 @@ _mesa_CompressedTexSubImage3DARB(GLenum target, GLint level, GLint xoffset,
                                  GLsizei height, GLsizei depth, GLenum format,
                                  GLsizei imageSize, const GLvoid *data)
 {
-   GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   GLboolean success = GL_FALSE;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    if (subtexture_error_check(ctx, 3, target, level, xoffset, yoffset, zoffset,
                               width, height, depth, format, GL_NONE)) {
@@ -3197,100 +2421,80 @@ _mesa_CompressedTexSubImage3DARB(GLenum target, GLint level, GLint xoffset,
 
    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    texObj = _mesa_select_tex_object(ctx, texUnit, target);
-   texImage = texObj->Image[level];
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    assert(texImage);
 
    if (width == 0 || height == 0 || depth == 0 || !data)
       return;  /* no-op, not an error */
 
    if (ctx->Driver.CompressedTexSubImage3D) {
-      success = (*ctx->Driver.CompressedTexSubImage3D)(ctx, target, level,
-                               xoffset, yoffset, zoffset, width, height, depth,
-                               format, imageSize, data, texObj, texImage);
-   }
-   if (!success) {
-      /* XXX what else can we do? */
-      gl_problem(ctx, "glCompressedTexSubImage3DARB failed!");
-      return;
+      (*ctx->Driver.CompressedTexSubImage3D)(ctx, target, level,
+                                             xoffset, yoffset, zoffset,
+                                             width, height, depth,
+                                             format, imageSize, data,
+                                             texObj, texImage);
    }
+   ctx->NewState |= _NEW_TEXTURE;
 }
 
 
 void
 _mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
 {
-   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_texture_unit *texUnit;
    const struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
+   GLint maxLevels;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   if (!texObj) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB");
+      return;
+   }
 
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetCompressedTexImageARB");
+   if (target == GL_TEXTURE_1D || target == GL_TEXTURE_2D) {
+      maxLevels = ctx->Const.MaxTextureLevels;
+   }
+   else if (target == GL_TEXTURE_3D) {
+      maxLevels = ctx->Const.Max3DTextureLevels;
+   }
+   else {
+      maxLevels = ctx->Const.MaxCubeTextureLevels;
+   }
 
-   if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
-      gl_error( ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)" );
+   ASSERT(maxLevels > 0);
+
+   if (level < 0 || level >= maxLevels) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)");
       return;
    }
 
-   switch (target) {
-      case GL_TEXTURE_1D:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[1];
-         texImage = texObj->Image[level];
-         break;
-      case GL_TEXTURE_2D:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[2];
-         texImage = texObj->Image[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->Image[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->NegX[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->PosY[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->NegY[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->PosZ[level];
-         break;
-      case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
-         texImage = texObj->NegZ[level];
-         break;
-      case GL_TEXTURE_3D:
-         texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[3];
-         texImage = texObj->Image[level];
-         break;
-      default:
-         gl_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
-         return;
+   if (is_proxy_target(target)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
+      return;
    }
 
+   texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
    if (!texImage) {
-      /* invalid mipmap level */
-      gl_error(ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)");
+      /* probably invalid mipmap level */
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)");
       return;
    }
 
    if (!texImage->IsCompressed) {
-      gl_error(ctx, GL_INVALID_OPERATION, "glGetCompressedTexImageARB");
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetCompressedTexImageARB");
       return;
    }
 
    if (!img)
       return;
 
-   if (ctx->Driver.GetCompressedTexImage) {
+   if (ctx->Extensions.ARB_texture_compression) {
+      ASSERT(ctx->Driver.GetCompressedTexImage);
       (*ctx->Driver.GetCompressedTexImage)(ctx, target, level, img, texObj,
                                            texImage);
    }
-   else {
-      gl_problem(ctx, "Driver doesn't implement GetCompressedTexImage");
-   }
 }