mesa libXext pixman git update 12 Apr 2011

1 files changed, 1938 insertions, 1938 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_cb_texture.c b/mesalib/src/mesa/state_tracker/st_cb_texture.c
index ab0db46df..914c06b70 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_texture.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_texture.c
@@ -1,1938 +1,1938 @@
-/**************************************************************************

- * 

- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

- * 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, sub license, 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 (including the

- * next paragraph) 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 NON-INFRINGEMENT.

- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR

- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- * 

- **************************************************************************/

-

-#include "main/mfeatures.h"

-#include "main/bufferobj.h"

-#include "main/enums.h"

-#include "main/fbobject.h"

-#include "main/formats.h"

-#include "main/image.h"

-#include "main/imports.h"

-#include "main/macros.h"

-#include "main/mipmap.h"

-#include "main/pack.h"

-#include "main/pbo.h"

-#include "main/pixeltransfer.h"

-#include "main/texcompress.h"

-#include "main/texfetch.h"

-#include "main/texgetimage.h"

-#include "main/teximage.h"

-#include "main/texobj.h"

-#include "main/texstore.h"

-

-#include "state_tracker/st_debug.h"

-#include "state_tracker/st_context.h"

-#include "state_tracker/st_cb_fbo.h"

-#include "state_tracker/st_cb_flush.h"

-#include "state_tracker/st_cb_texture.h"

-#include "state_tracker/st_format.h"

-#include "state_tracker/st_texture.h"

-#include "state_tracker/st_gen_mipmap.h"

-#include "state_tracker/st_atom.h"

-

-#include "pipe/p_context.h"

-#include "pipe/p_defines.h"

-#include "util/u_inlines.h"

-#include "pipe/p_shader_tokens.h"

-#include "util/u_tile.h"

-#include "util/u_blit.h"

-#include "util/u_format.h"

-#include "util/u_surface.h"

-#include "util/u_sampler.h"

-#include "util/u_math.h"

-#include "util/u_box.h"

-

-#define DBG if (0) printf

-

-

-static enum pipe_texture_target

-gl_target_to_pipe(GLenum target)

-{

-   switch (target) {

-   case GL_TEXTURE_1D:

-      return PIPE_TEXTURE_1D;

-   case GL_TEXTURE_2D:

-      return PIPE_TEXTURE_2D;

-   case GL_TEXTURE_RECTANGLE_NV:

-      return PIPE_TEXTURE_RECT;

-   case GL_TEXTURE_3D:

-      return PIPE_TEXTURE_3D;

-   case GL_TEXTURE_CUBE_MAP_ARB:

-      return PIPE_TEXTURE_CUBE;

-   case GL_TEXTURE_1D_ARRAY_EXT:

-      return PIPE_TEXTURE_1D_ARRAY;

-   case GL_TEXTURE_2D_ARRAY_EXT:

-      return PIPE_TEXTURE_2D_ARRAY;

-   case GL_TEXTURE_BUFFER:

-      return PIPE_BUFFER;

-   default:

-      assert(0);

-      return 0;

-   }

-}

-

-

-/** called via ctx->Driver.NewTextureImage() */

-static struct gl_texture_image *

-st_NewTextureImage(struct gl_context * ctx)

-{

-   DBG("%s\n", __FUNCTION__);

-   (void) ctx;

-   return (struct gl_texture_image *) ST_CALLOC_STRUCT(st_texture_image);

-}

-

-

-/** called via ctx->Driver.NewTextureObject() */

-static struct gl_texture_object *

-st_NewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)

-{

-   struct st_texture_object *obj = ST_CALLOC_STRUCT(st_texture_object);

-

-   DBG("%s\n", __FUNCTION__);

-   _mesa_initialize_texture_object(&obj->base, name, target);

-

-   return &obj->base;

-}

-

-/** called via ctx->Driver.DeleteTextureObject() */

-static void 

-st_DeleteTextureObject(struct gl_context *ctx,

-                       struct gl_texture_object *texObj)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_object *stObj = st_texture_object(texObj);

-   if (stObj->pt)

-      pipe_resource_reference(&stObj->pt, NULL);

-   if (stObj->sampler_view) {

-      if (stObj->sampler_view->context != st->pipe) {

-         /* Take "ownership" of this texture sampler view by setting

-          * its context pointer to this context.  This avoids potential

-          * crashes when the texture object is shared among contexts

-          * and the original/owner context has already been destroyed.

-          */

-         stObj->sampler_view->context = st->pipe;

-      }

-      pipe_sampler_view_reference(&stObj->sampler_view, NULL);

-   }

-   _mesa_delete_texture_object(ctx, texObj);

-}

-

-

-/** called via ctx->Driver.FreeTexImageData() */

-static void

-st_FreeTextureImageData(struct gl_context * ctx, struct gl_texture_image *texImage)

-{

-   struct st_texture_image *stImage = st_texture_image(texImage);

-

-   DBG("%s\n", __FUNCTION__);

-

-   if (stImage->pt) {

-      pipe_resource_reference(&stImage->pt, NULL);

-   }

-

-   if (texImage->Data) {

-      _mesa_align_free(texImage->Data);

-      texImage->Data = NULL;

-   }

-}

-

-

-/**

- * From linux kernel i386 header files, copes with odd sizes better

- * than COPY_DWORDS would:

- * XXX Put this in src/mesa/main/imports.h ???

- */

-#if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)

-static INLINE void *

-__memcpy(void *to, const void *from, size_t n)

-{

-   int d0, d1, d2;

-   __asm__ __volatile__("rep ; movsl\n\t"

-                        "testb $2,%b4\n\t"

-                        "je 1f\n\t"

-                        "movsw\n"

-                        "1:\ttestb $1,%b4\n\t"

-                        "je 2f\n\t"

-                        "movsb\n" "2:":"=&c"(d0), "=&D"(d1), "=&S"(d2)

-                        :"0"(n / 4), "q"(n), "1"((long) to), "2"((long) from)

-                        :"memory");

-   return (to);

-}

-#else

-#define __memcpy(a,b,c) memcpy(a,b,c)

-#endif

-

-

-/**

- * The system memcpy (at least on ubuntu 5.10) has problems copying

- * to agp (writecombined) memory from a source which isn't 64-byte

- * aligned - there is a 4x performance falloff.

- *

- * The x86 __memcpy is immune to this but is slightly slower

- * (10%-ish) than the system memcpy.

- *

- * The sse_memcpy seems to have a slight cliff at 64/32 bytes, but

- * isn't much faster than x86_memcpy for agp copies.

- * 

- * TODO: switch dynamically.

- */

-static void *

-do_memcpy(void *dest, const void *src, size_t n)

-{

-   if ((((unsigned long) src) & 63) || (((unsigned long) dest) & 63)) {

-      return __memcpy(dest, src, n);

-   }

-   else

-      return memcpy(dest, src, n);

-}

-

-

-/**

- * Return default texture resource binding bitmask for the given format.

- */

-static GLuint

-default_bindings(struct st_context *st, enum pipe_format format)

-{

-   struct pipe_screen *screen = st->pipe->screen;

-   const unsigned target = PIPE_TEXTURE_2D;

-   unsigned bindings;

-

-   if (util_format_is_depth_or_stencil(format))

-      bindings = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_DEPTH_STENCIL;

-   else

-      bindings = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;

-

-   if (screen->is_format_supported(screen, format, target, 0, bindings))

-      return bindings;

-   else {

-      /* Try non-sRGB. */

-      format = util_format_linear(format);

-

-      if (screen->is_format_supported(screen, format, target, 0, bindings))

-         return bindings;

-      else

-         return PIPE_BIND_SAMPLER_VIEW;

-   }

-}

-

-

-/** Return number of image dimensions (1, 2 or 3) for a texture target. */

-static GLuint

-get_texture_dims(GLenum target)

-{

-   switch (target) {

-   case GL_TEXTURE_1D:

-   case GL_TEXTURE_1D_ARRAY_EXT:

-   case GL_TEXTURE_BUFFER:

-      return 1;

-   case GL_TEXTURE_2D:

-   case GL_TEXTURE_CUBE_MAP_ARB:

-   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:

-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:

-   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:

-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:

-   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:

-   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:

-   case GL_TEXTURE_RECTANGLE_NV:

-   case GL_TEXTURE_2D_ARRAY_EXT:

-      return 2;

-   case GL_TEXTURE_3D:

-      return 3;

-   default:

-      assert(0 && "invalid texture target in get_texture_dims()");

-      return 1;

-   }

-}

-

-

-/**

- * Given the size of a mipmap image, try to compute the size of the level=0

- * mipmap image.

- *

- * Note that this isn't always accurate for odd-sized, non-POW textures.

- * For example, if level=1 and width=40 then the level=0 width may be 80 or 81.

- *

- * \return GL_TRUE for success, GL_FALSE for failure

- */

-static GLboolean

-guess_base_level_size(GLenum target,

-                      GLuint width, GLuint height, GLuint depth, GLuint level,

-                      GLuint *width0, GLuint *height0, GLuint *depth0)

-{ 

-   const GLuint dims = get_texture_dims(target);

-

-   assert(width >= 1);

-   assert(height >= 1);

-   assert(depth >= 1);

-

-   if (level > 0) {

-      /* Depending on the image's size, we can't always make a guess here */

-      if ((dims >= 1 && width == 1) ||

-          (dims >= 2 && height == 1) ||

-          (dims >= 3 && depth == 1)) {

-         /* we can't determine the image size at level=0 */

-         return GL_FALSE;

-      }

-

-      /* grow the image size until we hit level = 0 */

-      while (level > 0) {

-         if (width > 1)

-            width <<= 1;

-         if (height > 1)

-            height <<= 1;

-         if (depth > 1)

-            depth <<= 1;

-         level--;

-      }

-   }      

-

-   *width0 = width;

-   *height0 = height;

-   *depth0 = depth;

-

-   return GL_TRUE;

-}

-

-

-/**

- * Try to allocate a pipe_resource object for the given st_texture_object.

- *

- * We use the given st_texture_image as a clue to determine the size of the

- * mipmap image at level=0.

- *

- * \return GL_TRUE for success, GL_FALSE if out of memory.

- */

-static GLboolean

-guess_and_alloc_texture(struct st_context *st,

-			struct st_texture_object *stObj,

-			const struct st_texture_image *stImage)

-{

-   GLuint lastLevel, width, height, depth;

-   GLuint bindings;

-   GLuint ptWidth, ptHeight, ptDepth, ptLayers;

-   enum pipe_format fmt;

-

-   DBG("%s\n", __FUNCTION__);

-

-   assert(!stObj->pt);

-

-   if (!guess_base_level_size(stObj->base.Target,

-                              stImage->base.Width2,

-                              stImage->base.Height2,

-                              stImage->base.Depth2,

-                              stImage->level,

-                              &width, &height, &depth)) {

-      /* we can't determine the image size at level=0 */

-      stObj->width0 = stObj->height0 = stObj->depth0 = 0;

-      /* this is not an out of memory error */

-      return GL_TRUE;

-   }

-

-   /* At this point, (width x height x depth) is the expected size of

-    * the level=0 mipmap image.

-    */

-

-   /* Guess a reasonable value for lastLevel.  With OpenGL we have no

-    * idea how many mipmap levels will be in a texture until we start

-    * to render with it.  Make an educated guess here but be prepared

-    * to re-allocating a texture buffer with space for more (or fewer)

-    * mipmap levels later.

-    */

-   if ((stObj->base.MinFilter == GL_NEAREST ||

-        stObj->base.MinFilter == GL_LINEAR ||

-        stImage->base._BaseFormat == GL_DEPTH_COMPONENT ||

-        stImage->base._BaseFormat == GL_DEPTH_STENCIL_EXT) &&

-       !stObj->base.GenerateMipmap &&

-       stImage->level == 0) {

-      /* only alloc space for a single mipmap level */

-      lastLevel = 0;

-   }

-   else {

-      /* alloc space for a full mipmap */

-      GLuint l2width = util_logbase2(width);

-      GLuint l2height = util_logbase2(height);

-      GLuint l2depth = util_logbase2(depth);

-      lastLevel = MAX2(MAX2(l2width, l2height), l2depth);

-   }

-

-   /* Save the level=0 dimensions */

-   stObj->width0 = width;

-   stObj->height0 = height;

-   stObj->depth0 = depth;

-

-   fmt = st_mesa_format_to_pipe_format(stImage->base.TexFormat);

-

-   bindings = default_bindings(st, fmt);

-

-   st_gl_texture_dims_to_pipe_dims(stObj->base.Target,

-                                   width, height, depth,

-                                   &ptWidth, &ptHeight, &ptDepth, &ptLayers);

-

-   stObj->pt = st_texture_create(st,

-                                 gl_target_to_pipe(stObj->base.Target),

-                                 fmt,

-                                 lastLevel,

-                                 ptWidth,

-                                 ptHeight,

-                                 ptDepth,

-                                 ptLayers,

-                                 bindings);

-

-   DBG("%s returning %d\n", __FUNCTION__, (stObj->pt != NULL));

-

-   return stObj->pt != NULL;

-}

-

-

-/**

- * Adjust pixel unpack params and image dimensions to strip off the

- * texture border.

- * Gallium doesn't support texture borders.  They've seldem been used

- * and seldom been implemented correctly anyway.

- * \param unpackNew  returns the new pixel unpack parameters

- */

-static void

-strip_texture_border(GLint border,

-                     GLint *width, GLint *height, GLint *depth,

-                     const struct gl_pixelstore_attrib *unpack,

-                     struct gl_pixelstore_attrib *unpackNew)

-{

-   assert(border > 0);  /* sanity check */

-

-   *unpackNew = *unpack;

-

-   if (unpackNew->RowLength == 0)

-      unpackNew->RowLength = *width;

-

-   if (depth && unpackNew->ImageHeight == 0)

-      unpackNew->ImageHeight = *height;

-

-   unpackNew->SkipPixels += border;

-   if (height)

-      unpackNew->SkipRows += border;

-   if (depth)

-      unpackNew->SkipImages += border;

-

-   assert(*width >= 3);

-   *width = *width - 2 * border;

-   if (height && *height >= 3)

-      *height = *height - 2 * border;

-   if (depth && *depth >= 3)

-      *depth = *depth - 2 * border;

-}

-

-

-/**

- * Do glTexImage1/2/3D().

- */

-static void

-st_TexImage(struct gl_context * ctx,

-            GLint dims,

-            GLenum target, GLint level,

-            GLint internalFormat,

-            GLint width, GLint height, GLint depth,

-            GLint border,

-            GLenum format, GLenum type, const void *pixels,

-            const struct gl_pixelstore_attrib *unpack,

-            struct gl_texture_object *texObj,

-            struct gl_texture_image *texImage,

-            GLsizei imageSize, GLboolean compressed_src)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_object *stObj = st_texture_object(texObj);

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   GLuint dstRowStride = 0;

-   struct gl_pixelstore_attrib unpackNB;

-   enum pipe_transfer_usage transfer_usage = 0;

-

-   DBG("%s target %s level %d %dx%dx%d border %d\n", __FUNCTION__,

-       _mesa_lookup_enum_by_nr(target), level, width, height, depth, border);

-

-   /* switch to "normal" */

-   if (stObj->surface_based) {

-      gl_format texFormat;

-

-      _mesa_clear_texture_object(ctx, texObj);

-      pipe_resource_reference(&stObj->pt, NULL);

-

-      /* oops, need to init this image again */

-      texFormat = _mesa_choose_texture_format(ctx, texObj, target, level,

-                                              internalFormat, format, type);

-

-      _mesa_init_teximage_fields(ctx, target, texImage,

-                                 width, height, depth, border,

-                                 internalFormat, texFormat);

-

-      stObj->surface_based = GL_FALSE;

-   }

-

-   /* gallium does not support texture borders, strip it off */

-   if (border) {

-      strip_texture_border(border, &width, &height, &depth, unpack, &unpackNB);

-      unpack = &unpackNB;

-      texImage->Width = width;

-      texImage->Height = height;

-      texImage->Depth = depth;

-      texImage->Border = 0;

-      border = 0;

-   }

-   else {

-      assert(texImage->Width == width);

-      assert(texImage->Height == height);

-      assert(texImage->Depth == depth);

-   }

-

-   stImage->face = _mesa_tex_target_to_face(target);

-   stImage->level = level;

-

-   _mesa_set_fetch_functions(texImage, dims);

-

-   /* Release the reference to a potentially orphaned buffer.   

-    * Release any old malloced memory.

-    */

-   if (stImage->pt) {

-      pipe_resource_reference(&stImage->pt, NULL);

-      assert(!texImage->Data);

-   }

-   else if (texImage->Data) {

-      _mesa_align_free(texImage->Data);

-   }

-

-   /*

-    * See if the new image is somehow incompatible with the existing

-    * mipmap.  If so, free the old mipmap.

-    */

-   if (stObj->pt) {

-      if (level > (GLint) stObj->pt->last_level ||

-          !st_texture_match_image(stObj->pt, &stImage->base,

-                                  stImage->face, stImage->level)) {

-         DBG("release it\n");

-         pipe_resource_reference(&stObj->pt, NULL);

-         assert(!stObj->pt);

-         pipe_sampler_view_reference(&stObj->sampler_view, NULL);

-      }

-   }

-

-   if (width == 0 || height == 0 || depth == 0) {

-      /* stop after freeing old image */

-      return;

-   }

-

-   if (!stObj->pt) {

-      if (!guess_and_alloc_texture(st, stObj, stImage)) {

-         /* Probably out of memory.

-          * Try flushing any pending rendering, then retry.

-          */

-         st_finish(st);

-         if (!guess_and_alloc_texture(st, stObj, stImage)) {

-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");

-            return;

-         }

-      }

-   }

-

-   assert(!stImage->pt);

-

-   /* Check if this texture image can live inside the texture object's buffer.

-    * If so, store the image there.  Otherwise the image will temporarily live

-    * in its own buffer.

-    */

-   if (stObj->pt &&

-       st_texture_match_image(stObj->pt, &stImage->base,

-                              stImage->face, stImage->level)) {

-

-      pipe_resource_reference(&stImage->pt, stObj->pt);

-      assert(stImage->pt);

-   }

-

-   if (!stImage->pt)

-      DBG("XXX: Image did not fit into texture - storing in local memory!\n");

-

-   /* Pixel data may come from regular user memory or a PBO.  For the later,

-    * do bounds checking and map the PBO to read pixels data from it.

-    *

-    * XXX we should try to use a GPU-accelerated path to copy the image data

-    * from the PBO to the texture.

-    */

-   if (compressed_src) {

-      pixels = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, pixels,

-						      unpack,

-						      "glCompressedTexImage");

-   }

-   else {

-      pixels = _mesa_validate_pbo_teximage(ctx, dims, width, height, 1,

-					   format, type,

-					   pixels, unpack, "glTexImage");

-   }

-

-   /* for a 1D array upload the image as a series of layer with height = 1 */

-   if (target == GL_TEXTURE_1D_ARRAY) {

-      depth = height;

-      height = 1;

-   }

-

-   /*

-    * Prepare to store the texture data.  Either map the gallium texture buffer

-    * memory or malloc space for it.

-    */

-   if (stImage->pt) {

-      /* Store the image in the gallium texture memory buffer */

-      if (format == GL_DEPTH_COMPONENT &&

-          util_format_is_depth_and_stencil(stImage->pt->format))

-         transfer_usage = PIPE_TRANSFER_READ_WRITE;

-      else

-         transfer_usage = PIPE_TRANSFER_WRITE;

-

-      texImage->Data = st_texture_image_map(st, stImage, 0,

-                                            transfer_usage, 0, 0, width, height);

-      if(stImage->transfer)

-         dstRowStride = stImage->transfer->stride;

-   }

-   else {

-      /* Allocate regular memory and store the image there temporarily.   */

-      GLuint imageSize = _mesa_format_image_size(texImage->TexFormat,

-                                                 width, height, depth);

-      dstRowStride = _mesa_format_row_stride(texImage->TexFormat, width);

-

-      texImage->Data = _mesa_align_malloc(imageSize, 16);

-   }

-

-   if (!texImage->Data) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");

-      return;

-   }

-

-   if (!pixels) {

-      /* We've allocated texture memory, but have no pixel data - all done. */

-      goto done;

-   }

-

-   DBG("Upload image %dx%dx%d row_len %x pitch %x\n",

-       width, height, depth, width, dstRowStride);

-

-   /* Copy user texture image into the texture buffer.

-    */

-   if (compressed_src) {

-      const GLuint srcRowStride =

-         _mesa_format_row_stride(texImage->TexFormat, width);

-      if (dstRowStride == srcRowStride) {

-         memcpy(texImage->Data, pixels, imageSize);

-      }

-      else {

-         char *dst = texImage->Data;

-         const char *src = pixels;

-         GLuint i, bw, bh, lines;

-         _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);

-         lines = (height + bh - 1) / bh;

-

-         for (i = 0; i < lines; ++i) {

-            memcpy(dst, src, srcRowStride);

-            dst += dstRowStride;

-            src += srcRowStride;

-         }

-      }

-   }

-   else {

-      const GLuint srcImageStride =

-         _mesa_image_image_stride(unpack, width, height, format, type);

-      GLint i;

-      const GLubyte *src = (const GLubyte *) pixels;

-

-      for (i = 0; i < depth; i++) {

-	 if (!_mesa_texstore(ctx, dims, 

-                             texImage->_BaseFormat, 

-                             texImage->TexFormat, 

-                             texImage->Data,

-                             0, 0, 0, /* dstX/Y/Zoffset */

-                             dstRowStride,

-                             texImage->ImageOffsets,

-                             width, height, 1,

-                             format, type, src, unpack)) {

-	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");

-	 }

-

-	 if (stImage->pt && i + 1 < depth) {

-            /* unmap this slice */

-	    st_texture_image_unmap(st, stImage);

-            /* map next slice of 3D texture */

-	    texImage->Data = st_texture_image_map(st, stImage, i + 1,

-                                                  transfer_usage, 0, 0,

-                                                  width, height);

-	    src += srcImageStride;

-	 }

-      }

-   }

-

-done:

-   _mesa_unmap_teximage_pbo(ctx, unpack);

-

-   if (stImage->pt && texImage->Data) {

-      st_texture_image_unmap(st, stImage);

-      texImage->Data = NULL;

-   }

-}

-

-

-static void

-st_TexImage3D(struct gl_context * ctx,

-              GLenum target, GLint level,

-              GLint internalFormat,

-              GLint width, GLint height, GLint depth,

-              GLint border,

-              GLenum format, GLenum type, const void *pixels,

-              const struct gl_pixelstore_attrib *unpack,

-              struct gl_texture_object *texObj,

-              struct gl_texture_image *texImage)

-{

-   st_TexImage(ctx, 3, target, level, internalFormat, width, height, depth,

-               border, format, type, pixels, unpack, texObj, texImage,

-               0, GL_FALSE);

-}

-

-

-static void

-st_TexImage2D(struct gl_context * ctx,

-              GLenum target, GLint level,

-              GLint internalFormat,

-              GLint width, GLint height, GLint border,

-              GLenum format, GLenum type, const void *pixels,

-              const struct gl_pixelstore_attrib *unpack,

-              struct gl_texture_object *texObj,

-              struct gl_texture_image *texImage)

-{

-   st_TexImage(ctx, 2, target, level, internalFormat, width, height, 1, border,

-               format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);

-}

-

-

-static void

-st_TexImage1D(struct gl_context * ctx,

-              GLenum target, GLint level,

-              GLint internalFormat,

-              GLint width, GLint border,

-              GLenum format, GLenum type, const void *pixels,

-              const struct gl_pixelstore_attrib *unpack,

-              struct gl_texture_object *texObj,

-              struct gl_texture_image *texImage)

-{

-   st_TexImage(ctx, 1, target, level, internalFormat, width, 1, 1, border,

-               format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);

-}

-

-

-static void

-st_CompressedTexImage2D(struct gl_context *ctx, GLenum target, GLint level,

-                        GLint internalFormat,

-                        GLint width, GLint height, GLint border,

-                        GLsizei imageSize, const GLvoid *data,

-                        struct gl_texture_object *texObj,

-                        struct gl_texture_image *texImage)

-{

-   st_TexImage(ctx, 2, target, level, internalFormat, width, height, 1, border,

-               0, 0, data, &ctx->Unpack, texObj, texImage, imageSize, GL_TRUE);

-}

-

-

-

-/**

- * glGetTexImage() helper: decompress a compressed texture by rendering

- * a textured quad.  Store the results in the user's buffer.

- */

-static void

-decompress_with_blit(struct gl_context * ctx, GLenum target, GLint level,

-                     GLenum format, GLenum type, GLvoid *pixels,

-                     struct gl_texture_object *texObj,

-                     struct gl_texture_image *texImage)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   struct st_texture_object *stObj = st_texture_object(texObj);

-   struct pipe_sampler_view *src_view =

-      st_get_texture_sampler_view(stObj, pipe);

-   const GLuint width = texImage->Width;

-   const GLuint height = texImage->Height;

-   struct pipe_surface *dst_surface;

-   struct pipe_resource *dst_texture;

-   struct pipe_transfer *tex_xfer;

-   unsigned bind = (PIPE_BIND_RENDER_TARGET | /* util_blit may choose to render */

-		    PIPE_BIND_TRANSFER_READ);

-

-   /* create temp / dest surface */

-   if (!util_create_rgba_surface(pipe, width, height, bind,

-                                 &dst_texture, &dst_surface)) {

-      _mesa_problem(ctx, "util_create_rgba_surface() failed "

-                    "in decompress_with_blit()");

-      return;

-   }

-

-   /* blit/render/decompress */

-   util_blit_pixels_tex(st->blit,

-                        src_view,      /* pipe_resource (src) */

-                        0, 0,             /* src x0, y0 */

-                        width, height,    /* src x1, y1 */

-                        dst_surface,      /* pipe_surface (dst) */

-                        0, 0,             /* dst x0, y0 */

-                        width, height,    /* dst x1, y1 */

-                        0.0,              /* z */

-                        PIPE_TEX_MIPFILTER_NEAREST);

-

-   /* map the dst_surface so we can read from it */

-   tex_xfer = pipe_get_transfer(st_context(ctx)->pipe,

-                                dst_texture, 0, 0,

-                                PIPE_TRANSFER_READ,

-                                0, 0, width, height);

-

-   pixels = _mesa_map_pbo_dest(ctx, &ctx->Pack, pixels);

-

-   /* copy/pack data into user buffer */

-   if (st_equal_formats(stImage->pt->format, format, type)) {

-      /* memcpy */

-      const uint bytesPerRow = width * util_format_get_blocksize(stImage->pt->format);

-      ubyte *map = pipe_transfer_map(pipe, tex_xfer);

-      GLuint row;

-      for (row = 0; row < height; row++) {

-         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,

-                                              height, format, type, row, 0);

-         memcpy(dest, map, bytesPerRow);

-         map += tex_xfer->stride;

-      }

-      pipe_transfer_unmap(pipe, tex_xfer);

-   }

-   else {

-      /* format translation via floats */

-      GLuint row;

-      enum pipe_format format = util_format_linear(dst_texture->format);

-      for (row = 0; row < height; row++) {

-         const GLbitfield transferOps = 0x0; /* bypassed for glGetTexImage() */

-         GLfloat rgba[4 * MAX_WIDTH];

-         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,

-                                              height, format, type, row, 0);

-

-         if (ST_DEBUG & DEBUG_FALLBACK)

-            debug_printf("%s: fallback format translation\n", __FUNCTION__);

-

-         /* get float[4] rgba row from surface */

-         pipe_get_tile_rgba_format(pipe, tex_xfer, 0, row, width, 1,

-                                   format, rgba);

-

-         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format,

-                                    type, dest, &ctx->Pack, transferOps);

-      }

-   }

-

-   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);

-

-   pipe->transfer_destroy(pipe, tex_xfer);

-

-   /* destroy the temp / dest surface */

-   util_destroy_rgba_surface(dst_texture, dst_surface);

-}

-

-

-

-/**

- * Need to map texture image into memory before copying image data,

- * then unmap it.

- */

-static void

-st_get_tex_image(struct gl_context * ctx, GLenum target, GLint level,

-                 GLenum format, GLenum type, GLvoid * pixels,

-                 struct gl_texture_object *texObj,

-                 struct gl_texture_image *texImage, GLboolean compressed_dst)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   const GLuint dstImageStride =

-      _mesa_image_image_stride(&ctx->Pack, texImage->Width, texImage->Height,

-                               format, type);

-   GLuint depth, i;

-   GLubyte *dest;

-

-   if (stImage->pt &&

-       util_format_is_s3tc(stImage->pt->format) &&

-       !compressed_dst) {

-      /* Need to decompress the texture.

-       * We'll do this by rendering a textured quad.

-       * Note that we only expect RGBA formats (no Z/depth formats).

-       */

-      decompress_with_blit(ctx, target, level, format, type, pixels,

-                           texObj, texImage);

-      return;

-   }

-

-   /* Map */

-   if (stImage->pt) {

-      /* Image is stored in hardware format in a buffer managed by the

-       * kernel.  Need to explicitly map and unmap it.

-       */

-      texImage->Data = st_texture_image_map(st, stImage, 0,

-                                            PIPE_TRANSFER_READ, 0, 0,

-                                            stImage->base.Width,

-                                            stImage->base.Height);

-      /* compute stride in texels from stride in bytes */

-      texImage->RowStride = stImage->transfer->stride

-         * util_format_get_blockwidth(stImage->pt->format)

-         / util_format_get_blocksize(stImage->pt->format);

-   }

-   else {

-      /* Otherwise, the image should actually be stored in

-       * texImage->Data.  This is pretty confusing for

-       * everybody, I'd much prefer to separate the two functions of

-       * texImage->Data - storage for texture images in main memory

-       * and access (ie mappings) of images.  In other words, we'd

-       * create a new texImage->Map field and leave Data simply for

-       * storage.

-       */

-      assert(texImage->Data);

-   }

-

-   depth = texImage->Depth;

-   texImage->Depth = 1;

-

-   dest = (GLubyte *) pixels;

-

-   _mesa_set_fetch_functions(texImage, get_texture_dims(target));

-

-   for (i = 0; i < depth; i++) {

-      if (compressed_dst) {

-	 _mesa_get_compressed_teximage(ctx, target, level, dest,

-				       texObj, texImage);

-      }

-      else {

-	 _mesa_get_teximage(ctx, target, level, format, type, dest,

-			    texObj, texImage);

-      }

-

-      if (stImage->pt && i + 1 < depth) {

-         /* unmap this slice */

-	 st_texture_image_unmap(st, stImage);

-         /* map next slice of 3D texture */

-	 texImage->Data = st_texture_image_map(st, stImage, i + 1,

-                                               PIPE_TRANSFER_READ, 0, 0,

-                                               stImage->base.Width,

-                                               stImage->base.Height);

-	 dest += dstImageStride;

-      }

-   }

-

-   texImage->Depth = depth;

-

-   /* Unmap */

-   if (stImage->pt) {

-      st_texture_image_unmap(st, stImage);

-      texImage->Data = NULL;

-   }

-}

-

-

-static void

-st_GetTexImage(struct gl_context * ctx, GLenum target, GLint level,

-               GLenum format, GLenum type, GLvoid * pixels,

-               struct gl_texture_object *texObj,

-               struct gl_texture_image *texImage)

-{

-   st_get_tex_image(ctx, target, level, format, type, pixels, texObj, texImage,

-                    GL_FALSE);

-}

-

-

-static void

-st_GetCompressedTexImage(struct gl_context *ctx, GLenum target, GLint level,

-                         GLvoid *pixels,

-                         struct gl_texture_object *texObj,

-                         struct gl_texture_image *texImage)

-{

-   st_get_tex_image(ctx, target, level, 0, 0, pixels, texObj, texImage,

-                    GL_TRUE);

-}

-

-

-

-static void

-st_TexSubimage(struct gl_context *ctx, GLint dims, GLenum target, GLint level,

-               GLint xoffset, GLint yoffset, GLint zoffset,

-               GLint width, GLint height, GLint depth,

-               GLenum format, GLenum type, const void *pixels,

-               const struct gl_pixelstore_attrib *packing,

-               struct gl_texture_object *texObj,

-               struct gl_texture_image *texImage)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   GLuint dstRowStride;

-   const GLuint srcImageStride =

-      _mesa_image_image_stride(packing, width, height, format, type);

-   GLint i;

-   const GLubyte *src;

-   /* init to silence warning only: */

-   enum pipe_transfer_usage transfer_usage = PIPE_TRANSFER_WRITE;

-

-   DBG("%s target %s level %d offset %d,%d %dx%d\n", __FUNCTION__,

-       _mesa_lookup_enum_by_nr(target),

-       level, xoffset, yoffset, width, height);

-

-   pixels =

-      _mesa_validate_pbo_teximage(ctx, dims, width, height, depth, format,

-                                  type, pixels, packing, "glTexSubImage2D");

-   if (!pixels)

-      return;

-

-   /* for a 1D array upload the image as a series of layer with height = 1 */

-   if (target == GL_TEXTURE_1D_ARRAY) {

-      depth = height;

-      height = 1;

-   }

-

-   /* Map buffer if necessary.  Need to lock to prevent other contexts

-    * from uploading the buffer under us.

-    */

-   if (stImage->pt) {

-      if (format == GL_DEPTH_COMPONENT &&

-          util_format_is_depth_and_stencil(stImage->pt->format))

-         transfer_usage = PIPE_TRANSFER_READ_WRITE;

-      else

-         transfer_usage = PIPE_TRANSFER_WRITE;

-

-      texImage->Data = st_texture_image_map(st, stImage, zoffset, 

-                                            transfer_usage,

-                                            xoffset, yoffset,

-                                            width, height);

-   }

-

-   if (!texImage->Data) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");

-      goto done;

-   }

-

-   src = (const GLubyte *) pixels;

-   dstRowStride = stImage->transfer->stride;

-

-   for (i = 0; i < depth; i++) {

-      if (!_mesa_texstore(ctx, dims, texImage->_BaseFormat,

-                          texImage->TexFormat,

-                          texImage->Data,

-                          0, 0, 0,

-                          dstRowStride,

-                          texImage->ImageOffsets,

-                          width, height, 1,

-                          format, type, src, packing)) {

-	 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");

-      }

-

-      if (stImage->pt && i + 1 < depth) {

-         /* unmap this slice */

-	 st_texture_image_unmap(st, stImage);

-         /* map next slice of 3D texture */

-	 texImage->Data = st_texture_image_map(st, stImage,

-                                               zoffset + i + 1,

-                                               transfer_usage,

-                                               xoffset, yoffset,

-                                               width, height);

-	 src += srcImageStride;

-      }

-   }

-

-done:

-   _mesa_unmap_teximage_pbo(ctx, packing);

-

-   if (stImage->pt && texImage->Data) {

-      st_texture_image_unmap(st, stImage);

-      texImage->Data = NULL;

-   }

-}

-

-

-

-static void

-st_TexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,

-                 GLint xoffset, GLint yoffset, GLint zoffset,

-                 GLsizei width, GLsizei height, GLsizei depth,

-                 GLenum format, GLenum type, const GLvoid *pixels,

-                 const struct gl_pixelstore_attrib *packing,

-                 struct gl_texture_object *texObj,

-                 struct gl_texture_image *texImage)

-{

-   st_TexSubimage(ctx, 3, target, level, xoffset, yoffset, zoffset,

-                  width, height, depth, format, type,

-                  pixels, packing, texObj, texImage);

-}

-

-

-static void

-st_TexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,

-                 GLint xoffset, GLint yoffset,

-                 GLsizei width, GLsizei height,

-                 GLenum format, GLenum type, const GLvoid * pixels,

-                 const struct gl_pixelstore_attrib *packing,

-                 struct gl_texture_object *texObj,

-                 struct gl_texture_image *texImage)

-{

-   st_TexSubimage(ctx, 2, target, level, xoffset, yoffset, 0,

-                  width, height, 1, format, type,

-                  pixels, packing, texObj, texImage);

-}

-

-

-static void

-st_TexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,

-                 GLint xoffset, GLsizei width, GLenum format, GLenum type,

-                 const GLvoid * pixels,

-                 const struct gl_pixelstore_attrib *packing,

-                 struct gl_texture_object *texObj,

-                 struct gl_texture_image *texImage)

-{

-   st_TexSubimage(ctx, 1, target, level, xoffset, 0, 0, width, 1, 1,

-                  format, type, pixels, packing, texObj, texImage);

-}

-

-

-static void

-st_CompressedTexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,

-                           GLint xoffset, GLsizei width,

-                           GLenum format,

-                           GLsizei imageSize, const GLvoid *data,

-                           struct gl_texture_object *texObj,

-                           struct gl_texture_image *texImage)

-{

-   assert(0);

-}

-

-

-static void

-st_CompressedTexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,

-                           GLint xoffset, GLint yoffset,

-                           GLsizei width, GLint height,

-                           GLenum format,

-                           GLsizei imageSize, const GLvoid *data,

-                           struct gl_texture_object *texObj,

-                           struct gl_texture_image *texImage)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   int srcBlockStride;

-   int dstBlockStride;

-   int y;

-   enum pipe_format pformat;

-

-   if (stImage->pt) {

-      pformat = stImage->pt->format;

-

-      texImage->Data = st_texture_image_map(st, stImage, 0, 

-                                            PIPE_TRANSFER_WRITE,

-                                            xoffset, yoffset,

-                                            width, height);

-      

-      srcBlockStride = util_format_get_stride(pformat, width);

-      dstBlockStride = stImage->transfer->stride;

-   } else {

-      assert(stImage->pt);

-      /* TODO find good values for block and strides */

-      /* TODO also adjust texImage->data for yoffset/xoffset */

-      return;

-   }

-

-   if (!texImage->Data) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexSubImage");

-      return;

-   }

-

-   assert(xoffset % util_format_get_blockwidth(pformat) == 0);

-   assert(yoffset % util_format_get_blockheight(pformat) == 0);

-

-   for (y = 0; y < height; y += util_format_get_blockheight(pformat)) {

-      /* don't need to adjust for xoffset and yoffset as st_texture_image_map does that */

-      const char *src = (const char*)data + srcBlockStride * util_format_get_nblocksy(pformat, y);

-      char *dst = (char*)texImage->Data + dstBlockStride * util_format_get_nblocksy(pformat, y);

-      memcpy(dst, src, util_format_get_stride(pformat, width));

-   }

-

-   if (stImage->pt) {

-      st_texture_image_unmap(st, stImage);

-      texImage->Data = NULL;

-   }

-}

-

-

-static void

-st_CompressedTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,

-                           GLint xoffset, GLint yoffset, GLint zoffset,

-                           GLsizei width, GLint height, GLint depth,

-                           GLenum format,

-                           GLsizei imageSize, const GLvoid *data,

-                           struct gl_texture_object *texObj,

-                           struct gl_texture_image *texImage)

-{

-   assert(0);

-}

-

-

-

-/**

- * Do a CopyTexSubImage operation using a read transfer from the source,

- * a write transfer to the destination and get_tile()/put_tile() to access

- * the pixels/texels.

- *

- * Note: srcY=0=TOP of renderbuffer

- */

-static void

-fallback_copy_texsubimage(struct gl_context *ctx, GLenum target, GLint level,

-                          struct st_renderbuffer *strb,

-                          struct st_texture_image *stImage,

-                          GLenum baseFormat,

-                          GLint destX, GLint destY, GLint destZ,

-                          GLint srcX, GLint srcY,

-                          GLsizei width, GLsizei height)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   struct pipe_transfer *src_trans;

-   GLvoid *texDest;

-   enum pipe_transfer_usage transfer_usage;

-

-   if (ST_DEBUG & DEBUG_FALLBACK)

-      debug_printf("%s: fallback processing\n", __FUNCTION__);

-

-   assert(width <= MAX_WIDTH);

-

-   if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {

-      srcY = strb->Base.Height - srcY - height;

-   }

-

-   src_trans = pipe_get_transfer(st_context(ctx)->pipe,

-                                 strb->texture,

-                                 0, 0,

-                                 PIPE_TRANSFER_READ,

-                                 srcX, srcY,

-                                 width, height);

-

-   if ((baseFormat == GL_DEPTH_COMPONENT ||

-        baseFormat == GL_DEPTH_STENCIL) &&

-       util_format_is_depth_and_stencil(stImage->pt->format))

-      transfer_usage = PIPE_TRANSFER_READ_WRITE;

-   else

-      transfer_usage = PIPE_TRANSFER_WRITE;

-

-   /* XXX this used to ignore destZ param */

-   texDest = st_texture_image_map(st, stImage, destZ, transfer_usage,

-                                  destX, destY, width, height);

-

-   if (baseFormat == GL_DEPTH_COMPONENT ||

-       baseFormat == GL_DEPTH_STENCIL) {

-      const GLboolean scaleOrBias = (ctx->Pixel.DepthScale != 1.0F ||

-                                     ctx->Pixel.DepthBias != 0.0F);

-      GLint row, yStep;

-

-      /* determine bottom-to-top vs. top-to-bottom order for src buffer */

-      if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {

-         srcY = height - 1;

-         yStep = -1;

-      }

-      else {

-         srcY = 0;

-         yStep = 1;

-      }

-

-      /* To avoid a large temp memory allocation, do copy row by row */

-      for (row = 0; row < height; row++, srcY += yStep) {

-         uint data[MAX_WIDTH];

-         pipe_get_tile_z(pipe, src_trans, 0, srcY, width, 1, data);

-         if (scaleOrBias) {

-            _mesa_scale_and_bias_depth_uint(ctx, width, data);

-         }

-         pipe_put_tile_z(pipe, stImage->transfer, 0, row, width, 1, data);

-      }

-   }

-   else {

-      /* RGBA format */

-      GLfloat *tempSrc =

-         (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));

-

-      if (tempSrc && texDest) {

-         const GLint dims = 2;

-         const GLint dstRowStride = stImage->transfer->stride;

-         struct gl_texture_image *texImage = &stImage->base;

-         struct gl_pixelstore_attrib unpack = ctx->DefaultPacking;

-

-         if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {

-            unpack.Invert = GL_TRUE;

-         }

-

-         /* get float/RGBA image from framebuffer */

-         /* XXX this usually involves a lot of int/float conversion.

-          * try to avoid that someday.

-          */

-         pipe_get_tile_rgba_format(pipe, src_trans, 0, 0, width, height,

-                                   util_format_linear(strb->texture->format),

-                                   tempSrc);

-

-         /* Store into texture memory.

-          * Note that this does some special things such as pixel transfer

-          * ops and format conversion.  In particular, if the dest tex format

-          * is actually RGBA but the user created the texture as GL_RGB we

-          * need to fill-in/override the alpha channel with 1.0.

-          */

-         _mesa_texstore(ctx, dims,

-                        texImage->_BaseFormat, 

-                        texImage->TexFormat, 

-                        texDest,

-                        0, 0, 0,

-                        dstRowStride,

-                        texImage->ImageOffsets,

-                        width, height, 1,

-                        GL_RGBA, GL_FLOAT, tempSrc, /* src */

-                        &unpack);

-      }

-      else {

-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");

-      }

-

-      if (tempSrc)

-         free(tempSrc);

-   }

-

-   st_texture_image_unmap(st, stImage);

-   pipe->transfer_destroy(pipe, src_trans);

-}

-

-

-

-/**

- * If the format of the src renderbuffer and the format of the dest

- * texture are compatible (in terms of blitting), return a TGSI writemask

- * to be used during the blit.

- * If the src/dest are incompatible, return 0.

- */

-static unsigned

-compatible_src_dst_formats(struct gl_context *ctx,

-                           const struct gl_renderbuffer *src,

-                           const struct gl_texture_image *dst)

-{

-   /* Get logical base formats for the src and dest.

-    * That is, use the user-requested formats and not the actual, device-

-    * chosen formats.

-    * For example, the user may have requested an A8 texture but the

-    * driver may actually be using an RGBA texture format.  When we

-    * copy/blit to that texture, we only want to copy the Alpha channel

-    * and not the RGB channels.

-    *

-    * Similarly, when the src FBO was created an RGB format may have been

-    * requested but the driver actually chose an RGBA format.  In that case,

-    * we don't want to copy the undefined Alpha channel to the dest texture

-    * (it should be 1.0).

-    */

-   const GLenum srcFormat = _mesa_base_fbo_format(ctx, src->InternalFormat);

-   const GLenum dstFormat = _mesa_base_tex_format(ctx, dst->InternalFormat);

-

-   /**

-    * XXX when we have red-only and red/green renderbuffers we'll need

-    * to add more cases here (or implement a general-purpose routine that

-    * queries the existance of the R,G,B,A channels in the src and dest).

-    */

-   if (srcFormat == dstFormat) {

-      /* This is the same as matching_base_formats, which should

-       * always pass, as it did previously.

-       */

-      return TGSI_WRITEMASK_XYZW;

-   }

-   else if (srcFormat == GL_RGB && dstFormat == GL_RGBA) {

-      /* Make sure that A in the dest is 1.  The actual src format

-       * may be RGBA and have undefined A values.

-       */

-      return TGSI_WRITEMASK_XYZ;

-   }

-   else if (srcFormat == GL_RGBA && dstFormat == GL_RGB) {

-      /* Make sure that A in the dest is 1.  The actual dst format

-       * may be RGBA and will need A=1 to provide proper alpha values

-       * when sampled later.

-       */

-      return TGSI_WRITEMASK_XYZ;

-   }

-   else {

-      if (ST_DEBUG & DEBUG_FALLBACK)

-         debug_printf("%s failed for src %s, dst %s\n",

-                      __FUNCTION__, 

-                      _mesa_lookup_enum_by_nr(srcFormat),

-                      _mesa_lookup_enum_by_nr(dstFormat));

-

-      /* Otherwise fail.

-       */

-      return 0;

-   }

-}

-

-

-

-/**

- * Do a CopyTex[Sub]Image1/2/3D() using a hardware (blit) path if possible.

- * Note that the region to copy has already been clipped so we know we

- * won't read from outside the source renderbuffer's bounds.

- *

- * Note: srcY=0=Bottom of renderbuffer (GL convention)

- */

-static void

-st_copy_texsubimage(struct gl_context *ctx,

-                    GLenum target, GLint level,

-                    GLint destX, GLint destY, GLint destZ,

-                    GLint srcX, GLint srcY,

-                    GLsizei width, GLsizei height)

-{

-   struct gl_texture_unit *texUnit =

-      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];

-   struct gl_texture_object *texObj =

-      _mesa_select_tex_object(ctx, texUnit, target);

-   struct gl_texture_image *texImage =

-      _mesa_select_tex_image(ctx, texObj, target, level);

-   struct st_texture_image *stImage = st_texture_image(texImage);

-   const GLenum texBaseFormat = texImage->_BaseFormat;

-   struct gl_framebuffer *fb = ctx->ReadBuffer;

-   struct st_renderbuffer *strb;

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   struct pipe_screen *screen = pipe->screen;

-   enum pipe_format dest_format, src_format;

-   GLboolean use_fallback = GL_TRUE;

-   GLboolean matching_base_formats;

-   GLuint format_writemask, sample_count;

-   struct pipe_surface *dest_surface = NULL;

-   GLboolean do_flip = (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP);

-

-   /* make sure finalize_textures has been called? 

-    */

-   if (0) st_validate_state(st);

-

-   /* determine if copying depth or color data */

-   if (texBaseFormat == GL_DEPTH_COMPONENT ||

-       texBaseFormat == GL_DEPTH_STENCIL) {

-      strb = st_renderbuffer(fb->_DepthBuffer);

-      if (strb->Base.Wrapped) {

-         strb = st_renderbuffer(strb->Base.Wrapped);

-      }

-   }

-   else {

-      /* texBaseFormat == GL_RGB, GL_RGBA, GL_ALPHA, etc */

-      strb = st_renderbuffer(fb->_ColorReadBuffer);

-   }

-

-   if (!strb || !strb->surface || !stImage->pt) {

-      debug_printf("%s: null strb or stImage\n", __FUNCTION__);

-      return;

-   }

-

-   sample_count = strb->surface->texture->nr_samples;

-   /* I believe this would be legal, presumably would need to do a resolve

-      for color, and for depth/stencil spec says to just use one of the

-      depth/stencil samples per pixel? Need some transfer clarifications. */

-   assert(sample_count < 2);

-

-   if (srcX < 0) {

-      width -= -srcX;

-      destX += -srcX;

-      srcX = 0;

-   }

-

-   if (srcY < 0) {

-      height -= -srcY;

-      destY += -srcY;

-      srcY = 0;

-   }

-

-   if (destX < 0) {

-      width -= -destX;

-      srcX += -destX;

-      destX = 0;

-   }

-

-   if (destY < 0) {

-      height -= -destY;

-      srcY += -destY;

-      destY = 0;

-   }

-

-   if (width < 0 || height < 0)

-      return;

-

-

-   assert(strb);

-   assert(strb->surface);

-   assert(stImage->pt);

-

-   src_format = strb->surface->format;

-   dest_format = stImage->pt->format;

-

-   /*

-    * Determine if the src framebuffer and dest texture have the same

-    * base format.  We need this to detect a case such as the framebuffer

-    * being GL_RGBA but the texture being GL_RGB.  If the actual hardware

-    * texture format stores RGBA we need to set A=1 (overriding the

-    * framebuffer's alpha values).  We can't do that with the blit or

-    * textured-quad paths.

-    */

-   matching_base_formats =

-      (_mesa_get_format_base_format(strb->Base.Format) ==

-       _mesa_get_format_base_format(texImage->TexFormat));

-   format_writemask = compatible_src_dst_formats(ctx, &strb->Base, texImage);

-

-   if (ctx->_ImageTransferState == 0x0) {

-

-      if (matching_base_formats &&

-          src_format == dest_format &&

-          !do_flip)

-      {

-         /* use surface_copy() / blit */

-         struct pipe_box src_box;

-         u_box_2d_zslice(srcX, srcY, strb->surface->u.tex.first_layer,

-                         width, height, &src_box);

-

-         /* for resource_copy_region(), y=0=top, always */

-         pipe->resource_copy_region(pipe,

-                                    /* dest */

-                                    stImage->pt,

-                                    stImage->level,

-                                    destX, destY, destZ + stImage->face,

-                                    /* src */

-                                    strb->texture,

-                                    strb->surface->u.tex.level,

-                                    &src_box);

-         use_fallback = GL_FALSE;

-      }

-      else if (format_writemask &&

-               texBaseFormat != GL_DEPTH_COMPONENT &&

-               texBaseFormat != GL_DEPTH_STENCIL &&

-               screen->is_format_supported(screen, src_format,

-                                           PIPE_TEXTURE_2D, sample_count,

-                                           PIPE_BIND_SAMPLER_VIEW) &&

-               screen->is_format_supported(screen, dest_format,

-                                           PIPE_TEXTURE_2D, 0,

-                                           PIPE_BIND_RENDER_TARGET)) {

-         /* draw textured quad to do the copy */

-         GLint srcY0, srcY1;

-         struct pipe_surface surf_tmpl;

-         memset(&surf_tmpl, 0, sizeof(surf_tmpl));

-         surf_tmpl.format = util_format_linear(stImage->pt->format);

-         surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;

-         surf_tmpl.u.tex.level = stImage->level;

-         surf_tmpl.u.tex.first_layer = stImage->face + destZ;

-         surf_tmpl.u.tex.last_layer = stImage->face + destZ;

-

-         dest_surface = pipe->create_surface(pipe, stImage->pt,

-                                             &surf_tmpl);

-

-         if (do_flip) {

-            srcY1 = strb->Base.Height - srcY - height;

-            srcY0 = srcY1 + height;

-         }

-         else {

-            srcY0 = srcY;

-            srcY1 = srcY0 + height;

-         }

-

-         util_blit_pixels_writemask(st->blit,

-                                    strb->texture,

-                                    strb->surface->u.tex.level,

-                                    srcX, srcY0,

-                                    srcX + width, srcY1,

-                                    strb->surface->u.tex.first_layer,

-                                    dest_surface,

-                                    destX, destY,

-                                    destX + width, destY + height,

-                                    0.0, PIPE_TEX_MIPFILTER_NEAREST,

-                                    format_writemask);

-         use_fallback = GL_FALSE;

-      }

-

-      if (dest_surface)

-         pipe_surface_reference(&dest_surface, NULL);

-   }

-

-   if (use_fallback) {

-      /* software fallback */

-      fallback_copy_texsubimage(ctx, target, level,

-                                strb, stImage, texBaseFormat,

-                                destX, destY, destZ,

-                                srcX, srcY, width, height);

-   }

-}

-

-

-

-static void

-st_CopyTexImage1D(struct gl_context * ctx, GLenum target, GLint level,

-                  GLenum internalFormat,

-                  GLint x, GLint y, GLsizei width, GLint border)

-{

-   struct gl_texture_unit *texUnit =

-      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];

-   struct gl_texture_object *texObj =

-      _mesa_select_tex_object(ctx, texUnit, target);

-   struct gl_texture_image *texImage =

-      _mesa_select_tex_image(ctx, texObj, target, level);

-

-   /* Setup or redefine the texture object, texture and texture

-    * image.  Don't populate yet.  

-    */

-   ctx->Driver.TexImage1D(ctx, target, level, internalFormat,

-                          width, border,

-                          GL_RGBA, CHAN_TYPE, NULL,

-                          &ctx->DefaultPacking, texObj, texImage);

-

-   st_copy_texsubimage(ctx, target, level,

-                       0, 0, 0,  /* destX,Y,Z */

-                       x, y, width, 1);  /* src X, Y, size */

-}

-

-

-static void

-st_CopyTexImage2D(struct gl_context * ctx, GLenum target, GLint level,

-                  GLenum internalFormat,

-                  GLint x, GLint y, GLsizei width, GLsizei height,

-                  GLint border)

-{

-   struct gl_texture_unit *texUnit =

-      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];

-   struct gl_texture_object *texObj =

-      _mesa_select_tex_object(ctx, texUnit, target);

-   struct gl_texture_image *texImage =

-      _mesa_select_tex_image(ctx, texObj, target, level);

-

-   /* Setup or redefine the texture object, texture and texture

-    * image.  Don't populate yet.  

-    */

-   ctx->Driver.TexImage2D(ctx, target, level, internalFormat,

-                          width, height, border,

-                          GL_RGBA, CHAN_TYPE, NULL,

-                          &ctx->DefaultPacking, texObj, texImage);

-

-   st_copy_texsubimage(ctx, target, level,

-                       0, 0, 0,  /* destX,Y,Z */

-                       x, y, width, height);  /* src X, Y, size */

-}

-

-

-static void

-st_CopyTexSubImage1D(struct gl_context * ctx, GLenum target, GLint level,

-                     GLint xoffset, GLint x, GLint y, GLsizei width)

-{

-   const GLint yoffset = 0, zoffset = 0;

-   const GLsizei height = 1;

-   st_copy_texsubimage(ctx, target, level,

-                       xoffset, yoffset, zoffset,  /* destX,Y,Z */

-                       x, y, width, height);  /* src X, Y, size */

-}

-

-

-static void

-st_CopyTexSubImage2D(struct gl_context * ctx, GLenum target, GLint level,

-                     GLint xoffset, GLint yoffset,

-                     GLint x, GLint y, GLsizei width, GLsizei height)

-{

-   const GLint zoffset = 0;

-   st_copy_texsubimage(ctx, target, level,

-                       xoffset, yoffset, zoffset,  /* destX,Y,Z */

-                       x, y, width, height);  /* src X, Y, size */

-}

-

-

-static void

-st_CopyTexSubImage3D(struct gl_context * ctx, GLenum target, GLint level,

-                     GLint xoffset, GLint yoffset, GLint zoffset,

-                     GLint x, GLint y, GLsizei width, GLsizei height)

-{

-   st_copy_texsubimage(ctx, target, level,

-                       xoffset, yoffset, zoffset,  /* destX,Y,Z */

-                       x, y, width, height);  /* src X, Y, size */

-}

-

-

-/**

- * Copy image data from stImage into the texture object 'stObj' at level

- * 'dstLevel'.

- */

-static void

-copy_image_data_to_texture(struct st_context *st,

-			   struct st_texture_object *stObj,

-                           GLuint dstLevel,

-			   struct st_texture_image *stImage)

-{

-   /* debug checks */

-   {

-      const struct gl_texture_image *dstImage =

-         stObj->base.Image[stImage->face][stImage->level];

-      assert(dstImage);

-      assert(dstImage->Width == stImage->base.Width);

-      assert(dstImage->Height == stImage->base.Height);

-      assert(dstImage->Depth == stImage->base.Depth);

-   }

-

-   if (stImage->pt) {

-      /* Copy potentially with the blitter:

-       */

-      st_texture_image_copy(st->pipe,

-                            stObj->pt, dstLevel,  /* dest texture, level */

-                            stImage->pt, stImage->level, /* src texture, level */

-                            stImage->face);

-

-      pipe_resource_reference(&stImage->pt, NULL);

-   }

-   else if (stImage->base.Data) {

-      st_texture_image_data(st,

-                            stObj->pt,

-                            stImage->face,

-                            dstLevel,

-                            stImage->base.Data,

-                            stImage->base.RowStride * 

-                            util_format_get_blocksize(stObj->pt->format),

-                            stImage->base.RowStride *

-                            stImage->base.Height *

-                            util_format_get_blocksize(stObj->pt->format));

-      _mesa_align_free(stImage->base.Data);

-      stImage->base.Data = NULL;

-   }

-

-   pipe_resource_reference(&stImage->pt, stObj->pt);

-}

-

-

-/**

- * Called during state validation.  When this function is finished,

- * the texture object should be ready for rendering.

- * \return GL_TRUE for success, GL_FALSE for failure (out of mem)

- */

-GLboolean

-st_finalize_texture(struct gl_context *ctx,

-		    struct pipe_context *pipe,

-		    struct gl_texture_object *tObj)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_texture_object *stObj = st_texture_object(tObj);

-   const GLuint nr_faces = (stObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;

-   GLuint face;

-   struct st_texture_image *firstImage;

-   enum pipe_format firstImageFormat;

-   GLuint ptWidth, ptHeight, ptDepth, ptLayers;

-

-   if (stObj->base._Complete) {

-      /* The texture is complete and we know exactly how many mipmap levels

-       * are present/needed.  This is conditional because we may be called

-       * from the st_generate_mipmap() function when the texture object is

-       * incomplete.  In that case, we'll have set stObj->lastLevel before

-       * we get here.

-       */

-      if (stObj->base.MinFilter == GL_LINEAR ||

-          stObj->base.MinFilter == GL_NEAREST)

-         stObj->lastLevel = stObj->base.BaseLevel;

-      else

-         stObj->lastLevel = stObj->base._MaxLevel;

-   }

-

-   firstImage = st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]);

-   assert(firstImage);

-

-   /* If both firstImage and stObj point to a texture which can contain

-    * all active images, favour firstImage.  Note that because of the

-    * completeness requirement, we know that the image dimensions

-    * will match.

-    */

-   if (firstImage->pt &&

-       firstImage->pt != stObj->pt &&

-       (!stObj->pt || firstImage->pt->last_level >= stObj->pt->last_level)) {

-      pipe_resource_reference(&stObj->pt, firstImage->pt);

-      pipe_sampler_view_reference(&stObj->sampler_view, NULL);

-   }

-

-   /* Find gallium format for the Mesa texture */

-   firstImageFormat = st_mesa_format_to_pipe_format(firstImage->base.TexFormat);

-

-   /* Find size of level=0 Gallium mipmap image, plus number of texture layers */

-   {

-      GLuint width, height, depth;

-      if (!guess_base_level_size(stObj->base.Target,

-                                 firstImage->base.Width2,

-                                 firstImage->base.Height2,

-                                 firstImage->base.Depth2,

-                                 stObj->base.BaseLevel,

-                                 &width, &height, &depth)) {

-         width = stObj->width0;

-         height = stObj->height0;

-         depth = stObj->depth0;

-      }

-      /* convert GL dims to Gallium dims */

-      st_gl_texture_dims_to_pipe_dims(stObj->base.Target, width, height, depth,

-                                      &ptWidth, &ptHeight, &ptDepth, &ptLayers);

-   }

-

-   /* If we already have a gallium texture, check that it matches the texture

-    * object's format, target, size, num_levels, etc.

-    */

-   if (stObj->pt) {

-      if (stObj->pt->target != gl_target_to_pipe(stObj->base.Target) ||

-          !st_sampler_compat_formats(stObj->pt->format, firstImageFormat) ||

-          stObj->pt->last_level < stObj->lastLevel ||

-          stObj->pt->width0 != ptWidth ||

-          stObj->pt->height0 != ptHeight ||

-          stObj->pt->depth0 != ptDepth ||

-          stObj->pt->array_size != ptLayers)

-      {

-         /* The gallium texture does not match the Mesa texture so delete the

-          * gallium texture now.  We'll make a new one below.

-          */

-         pipe_resource_reference(&stObj->pt, NULL);

-         pipe_sampler_view_reference(&stObj->sampler_view, NULL);

-         st->dirty.st |= ST_NEW_FRAMEBUFFER;

-      }

-   }

-

-   /* May need to create a new gallium texture:

-    */

-   if (!stObj->pt) {

-      GLuint bindings = default_bindings(st, firstImageFormat);

-

-      stObj->pt = st_texture_create(st,

-                                    gl_target_to_pipe(stObj->base.Target),

-                                    firstImageFormat,

-                                    stObj->lastLevel,

-                                    ptWidth,

-                                    ptHeight,

-                                    ptDepth,

-                                    ptLayers,

-                                    bindings);

-

-      if (!stObj->pt) {

-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");

-         return GL_FALSE;

-      }

-   }

-

-   /* Pull in any images not in the object's texture:

-    */

-   for (face = 0; face < nr_faces; face++) {

-      GLuint level;

-      for (level = stObj->base.BaseLevel; level <= stObj->lastLevel; level++) {

-         struct st_texture_image *stImage =

-            st_texture_image(stObj->base.Image[face][level]);

-

-         /* Need to import images in main memory or held in other textures.

-          */

-         if (stImage && stObj->pt != stImage->pt) {

-            copy_image_data_to_texture(st, stObj, level, stImage);

-         }

-      }

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Returns pointer to a default/dummy texture.

- * This is typically used when the current shader has tex/sample instructions

- * but the user has not provided a (any) texture(s).

- */

-struct gl_texture_object *

-st_get_default_texture(struct st_context *st)

-{

-   if (!st->default_texture) {

-      static const GLenum target = GL_TEXTURE_2D;

-      GLubyte pixels[16][16][4];

-      struct gl_texture_object *texObj;

-      struct gl_texture_image *texImg;

-      GLuint i, j;

-

-      /* The ARB_fragment_program spec says (0,0,0,1) should be returned

-       * when attempting to sample incomplete textures.

-       */

-      for (i = 0; i < 16; i++) {

-         for (j = 0; j < 16; j++) {

-            pixels[i][j][0] = 0;

-            pixels[i][j][1] = 0;

-            pixels[i][j][2] = 0;

-            pixels[i][j][3] = 255;

-         }

-      }

-

-      texObj = st->ctx->Driver.NewTextureObject(st->ctx, 0, target);

-

-      texImg = _mesa_get_tex_image(st->ctx, texObj, target, 0);

-

-      _mesa_init_teximage_fields(st->ctx, target, texImg,

-                                 16, 16, 1, 0,  /* w, h, d, border */

-                                 GL_RGBA, MESA_FORMAT_RGBA8888);

-

-      st_TexImage(st->ctx, 2, target,

-                  0, GL_RGBA,    /* level, intformat */

-                  16, 16, 1, 0,  /* w, h, d, border */

-                  GL_RGBA, GL_UNSIGNED_BYTE, pixels,

-                  &st->ctx->DefaultPacking,

-                  texObj, texImg,

-                  0, 0);

-

-      texObj->MinFilter = GL_NEAREST;

-      texObj->MagFilter = GL_NEAREST;

-      texObj->_Complete = GL_TRUE;

-

-      st->default_texture = texObj;

-   }

-   return st->default_texture;

-}

-

-

-void

-st_init_texture_functions(struct dd_function_table *functions)

-{

-   functions->ChooseTextureFormat = st_ChooseTextureFormat;

-   functions->TexImage1D = st_TexImage1D;

-   functions->TexImage2D = st_TexImage2D;

-   functions->TexImage3D = st_TexImage3D;

-   functions->TexSubImage1D = st_TexSubImage1D;

-   functions->TexSubImage2D = st_TexSubImage2D;

-   functions->TexSubImage3D = st_TexSubImage3D;

-   functions->CompressedTexSubImage1D = st_CompressedTexSubImage1D;

-   functions->CompressedTexSubImage2D = st_CompressedTexSubImage2D;

-   functions->CompressedTexSubImage3D = st_CompressedTexSubImage3D;

-   functions->CopyTexImage1D = st_CopyTexImage1D;

-   functions->CopyTexImage2D = st_CopyTexImage2D;

-   functions->CopyTexSubImage1D = st_CopyTexSubImage1D;

-   functions->CopyTexSubImage2D = st_CopyTexSubImage2D;

-   functions->CopyTexSubImage3D = st_CopyTexSubImage3D;

-   functions->GenerateMipmap = st_generate_mipmap;

-

-   functions->GetTexImage = st_GetTexImage;

-

-   /* compressed texture functions */

-   functions->CompressedTexImage2D = st_CompressedTexImage2D;

-   functions->GetCompressedTexImage = st_GetCompressedTexImage;

-

-   functions->NewTextureObject = st_NewTextureObject;

-   functions->NewTextureImage = st_NewTextureImage;

-   functions->DeleteTexture = st_DeleteTextureObject;

-   functions->FreeTexImageData = st_FreeTextureImageData;

-

-   functions->TextureMemCpy = do_memcpy;

-

-   /* XXX Temporary until we can query pipe's texture sizes */

-   functions->TestProxyTexImage = _mesa_test_proxy_teximage;

-}

+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include "main/mfeatures.h"
+#include "main/bufferobj.h"
+#include "main/enums.h"
+#include "main/fbobject.h"
+#include "main/formats.h"
+#include "main/image.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mipmap.h"
+#include "main/pack.h"
+#include "main/pbo.h"
+#include "main/pixeltransfer.h"
+#include "main/texcompress.h"
+#include "main/texfetch.h"
+#include "main/texgetimage.h"
+#include "main/teximage.h"
+#include "main/texobj.h"
+#include "main/texstore.h"
+
+#include "state_tracker/st_debug.h"
+#include "state_tracker/st_context.h"
+#include "state_tracker/st_cb_fbo.h"
+#include "state_tracker/st_cb_flush.h"
+#include "state_tracker/st_cb_texture.h"
+#include "state_tracker/st_format.h"
+#include "state_tracker/st_texture.h"
+#include "state_tracker/st_gen_mipmap.h"
+#include "state_tracker/st_atom.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "pipe/p_shader_tokens.h"
+#include "util/u_tile.h"
+#include "util/u_blit.h"
+#include "util/u_format.h"
+#include "util/u_surface.h"
+#include "util/u_sampler.h"
+#include "util/u_math.h"
+#include "util/u_box.h"
+
+#define DBG if (0) printf
+
+
+static enum pipe_texture_target
+gl_target_to_pipe(GLenum target)
+{
+   switch (target) {
+   case GL_TEXTURE_1D:
+      return PIPE_TEXTURE_1D;
+   case GL_TEXTURE_2D:
+      return PIPE_TEXTURE_2D;
+   case GL_TEXTURE_RECTANGLE_NV:
+      return PIPE_TEXTURE_RECT;
+   case GL_TEXTURE_3D:
+      return PIPE_TEXTURE_3D;
+   case GL_TEXTURE_CUBE_MAP_ARB:
+      return PIPE_TEXTURE_CUBE;
+   case GL_TEXTURE_1D_ARRAY_EXT:
+      return PIPE_TEXTURE_1D_ARRAY;
+   case GL_TEXTURE_2D_ARRAY_EXT:
+      return PIPE_TEXTURE_2D_ARRAY;
+   case GL_TEXTURE_BUFFER:
+      return PIPE_BUFFER;
+   default:
+      assert(0);
+      return 0;
+   }
+}
+
+
+/** called via ctx->Driver.NewTextureImage() */
+static struct gl_texture_image *
+st_NewTextureImage(struct gl_context * ctx)
+{
+   DBG("%s\n", __FUNCTION__);
+   (void) ctx;
+   return (struct gl_texture_image *) ST_CALLOC_STRUCT(st_texture_image);
+}
+
+
+/** called via ctx->Driver.NewTextureObject() */
+static struct gl_texture_object *
+st_NewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
+{
+   struct st_texture_object *obj = ST_CALLOC_STRUCT(st_texture_object);
+
+   DBG("%s\n", __FUNCTION__);
+   _mesa_initialize_texture_object(&obj->base, name, target);
+
+   return &obj->base;
+}
+
+/** called via ctx->Driver.DeleteTextureObject() */
+static void 
+st_DeleteTextureObject(struct gl_context *ctx,
+                       struct gl_texture_object *texObj)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_object *stObj = st_texture_object(texObj);
+   if (stObj->pt)
+      pipe_resource_reference(&stObj->pt, NULL);
+   if (stObj->sampler_view) {
+      if (stObj->sampler_view->context != st->pipe) {
+         /* Take "ownership" of this texture sampler view by setting
+          * its context pointer to this context.  This avoids potential
+          * crashes when the texture object is shared among contexts
+          * and the original/owner context has already been destroyed.
+          */
+         stObj->sampler_view->context = st->pipe;
+      }
+      pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+   }
+   _mesa_delete_texture_object(ctx, texObj);
+}
+
+
+/** called via ctx->Driver.FreeTexImageData() */
+static void
+st_FreeTextureImageData(struct gl_context * ctx, struct gl_texture_image *texImage)
+{
+   struct st_texture_image *stImage = st_texture_image(texImage);
+
+   DBG("%s\n", __FUNCTION__);
+
+   if (stImage->pt) {
+      pipe_resource_reference(&stImage->pt, NULL);
+   }
+
+   if (texImage->Data) {
+      _mesa_align_free(texImage->Data);
+      texImage->Data = NULL;
+   }
+}
+
+
+/**
+ * From linux kernel i386 header files, copes with odd sizes better
+ * than COPY_DWORDS would:
+ * XXX Put this in src/mesa/main/imports.h ???
+ */
+#if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
+static INLINE void *
+__memcpy(void *to, const void *from, size_t n)
+{
+   int d0, d1, d2;
+   __asm__ __volatile__("rep ; movsl\n\t"
+                        "testb $2,%b4\n\t"
+                        "je 1f\n\t"
+                        "movsw\n"
+                        "1:\ttestb $1,%b4\n\t"
+                        "je 2f\n\t"
+                        "movsb\n" "2:":"=&c"(d0), "=&D"(d1), "=&S"(d2)
+                        :"0"(n / 4), "q"(n), "1"((long) to), "2"((long) from)
+                        :"memory");
+   return (to);
+}
+#else
+#define __memcpy(a,b,c) memcpy(a,b,c)
+#endif
+
+
+/**
+ * The system memcpy (at least on ubuntu 5.10) has problems copying
+ * to agp (writecombined) memory from a source which isn't 64-byte
+ * aligned - there is a 4x performance falloff.
+ *
+ * The x86 __memcpy is immune to this but is slightly slower
+ * (10%-ish) than the system memcpy.
+ *
+ * The sse_memcpy seems to have a slight cliff at 64/32 bytes, but
+ * isn't much faster than x86_memcpy for agp copies.
+ * 
+ * TODO: switch dynamically.
+ */
+static void *
+do_memcpy(void *dest, const void *src, size_t n)
+{
+   if ((((unsigned long) src) & 63) || (((unsigned long) dest) & 63)) {
+      return __memcpy(dest, src, n);
+   }
+   else
+      return memcpy(dest, src, n);
+}
+
+
+/**
+ * Return default texture resource binding bitmask for the given format.
+ */
+static GLuint
+default_bindings(struct st_context *st, enum pipe_format format)
+{
+   struct pipe_screen *screen = st->pipe->screen;
+   const unsigned target = PIPE_TEXTURE_2D;
+   unsigned bindings;
+
+   if (util_format_is_depth_or_stencil(format))
+      bindings = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_DEPTH_STENCIL;
+   else
+      bindings = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;
+
+   if (screen->is_format_supported(screen, format, target, 0, bindings))
+      return bindings;
+   else {
+      /* Try non-sRGB. */
+      format = util_format_linear(format);
+
+      if (screen->is_format_supported(screen, format, target, 0, bindings))
+         return bindings;
+      else
+         return PIPE_BIND_SAMPLER_VIEW;
+   }
+}
+
+
+/** Return number of image dimensions (1, 2 or 3) for a texture target. */
+static GLuint
+get_texture_dims(GLenum target)
+{
+   switch (target) {
+   case GL_TEXTURE_1D:
+   case GL_TEXTURE_1D_ARRAY_EXT:
+   case GL_TEXTURE_BUFFER:
+      return 1;
+   case GL_TEXTURE_2D:
+   case GL_TEXTURE_CUBE_MAP_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
+   case GL_TEXTURE_RECTANGLE_NV:
+   case GL_TEXTURE_2D_ARRAY_EXT:
+      return 2;
+   case GL_TEXTURE_3D:
+      return 3;
+   default:
+      assert(0 && "invalid texture target in get_texture_dims()");
+      return 1;
+   }
+}
+
+
+/**
+ * Given the size of a mipmap image, try to compute the size of the level=0
+ * mipmap image.
+ *
+ * Note that this isn't always accurate for odd-sized, non-POW textures.
+ * For example, if level=1 and width=40 then the level=0 width may be 80 or 81.
+ *
+ * \return GL_TRUE for success, GL_FALSE for failure
+ */
+static GLboolean
+guess_base_level_size(GLenum target,
+                      GLuint width, GLuint height, GLuint depth, GLuint level,
+                      GLuint *width0, GLuint *height0, GLuint *depth0)
+{ 
+   const GLuint dims = get_texture_dims(target);
+
+   assert(width >= 1);
+   assert(height >= 1);
+   assert(depth >= 1);
+
+   if (level > 0) {
+      /* Depending on the image's size, we can't always make a guess here */
+      if ((dims >= 1 && width == 1) ||
+          (dims >= 2 && height == 1) ||
+          (dims >= 3 && depth == 1)) {
+         /* we can't determine the image size at level=0 */
+         return GL_FALSE;
+      }
+
+      /* grow the image size until we hit level = 0 */
+      while (level > 0) {
+         if (width > 1)
+            width <<= 1;
+         if (height > 1)
+            height <<= 1;
+         if (depth > 1)
+            depth <<= 1;
+         level--;
+      }
+   }      
+
+   *width0 = width;
+   *height0 = height;
+   *depth0 = depth;
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Try to allocate a pipe_resource object for the given st_texture_object.
+ *
+ * We use the given st_texture_image as a clue to determine the size of the
+ * mipmap image at level=0.
+ *
+ * \return GL_TRUE for success, GL_FALSE if out of memory.
+ */
+static GLboolean
+guess_and_alloc_texture(struct st_context *st,
+			struct st_texture_object *stObj,
+			const struct st_texture_image *stImage)
+{
+   GLuint lastLevel, width, height, depth;
+   GLuint bindings;
+   GLuint ptWidth, ptHeight, ptDepth, ptLayers;
+   enum pipe_format fmt;
+
+   DBG("%s\n", __FUNCTION__);
+
+   assert(!stObj->pt);
+
+   if (!guess_base_level_size(stObj->base.Target,
+                              stImage->base.Width2,
+                              stImage->base.Height2,
+                              stImage->base.Depth2,
+                              stImage->level,
+                              &width, &height, &depth)) {
+      /* we can't determine the image size at level=0 */
+      stObj->width0 = stObj->height0 = stObj->depth0 = 0;
+      /* this is not an out of memory error */
+      return GL_TRUE;
+   }
+
+   /* At this point, (width x height x depth) is the expected size of
+    * the level=0 mipmap image.
+    */
+
+   /* Guess a reasonable value for lastLevel.  With OpenGL we have no
+    * idea how many mipmap levels will be in a texture until we start
+    * to render with it.  Make an educated guess here but be prepared
+    * to re-allocating a texture buffer with space for more (or fewer)
+    * mipmap levels later.
+    */
+   if ((stObj->base.Sampler.MinFilter == GL_NEAREST ||
+        stObj->base.Sampler.MinFilter == GL_LINEAR ||
+        stImage->base._BaseFormat == GL_DEPTH_COMPONENT ||
+        stImage->base._BaseFormat == GL_DEPTH_STENCIL_EXT) &&
+       !stObj->base.GenerateMipmap &&
+       stImage->level == 0) {
+      /* only alloc space for a single mipmap level */
+      lastLevel = 0;
+   }
+   else {
+      /* alloc space for a full mipmap */
+      GLuint l2width = util_logbase2(width);
+      GLuint l2height = util_logbase2(height);
+      GLuint l2depth = util_logbase2(depth);
+      lastLevel = MAX2(MAX2(l2width, l2height), l2depth);
+   }
+
+   /* Save the level=0 dimensions */
+   stObj->width0 = width;
+   stObj->height0 = height;
+   stObj->depth0 = depth;
+
+   fmt = st_mesa_format_to_pipe_format(stImage->base.TexFormat);
+
+   bindings = default_bindings(st, fmt);
+
+   st_gl_texture_dims_to_pipe_dims(stObj->base.Target,
+                                   width, height, depth,
+                                   &ptWidth, &ptHeight, &ptDepth, &ptLayers);
+
+   stObj->pt = st_texture_create(st,
+                                 gl_target_to_pipe(stObj->base.Target),
+                                 fmt,
+                                 lastLevel,
+                                 ptWidth,
+                                 ptHeight,
+                                 ptDepth,
+                                 ptLayers,
+                                 bindings);
+
+   DBG("%s returning %d\n", __FUNCTION__, (stObj->pt != NULL));
+
+   return stObj->pt != NULL;
+}
+
+
+/**
+ * Adjust pixel unpack params and image dimensions to strip off the
+ * texture border.
+ * Gallium doesn't support texture borders.  They've seldem been used
+ * and seldom been implemented correctly anyway.
+ * \param unpackNew  returns the new pixel unpack parameters
+ */
+static void
+strip_texture_border(GLint border,
+                     GLint *width, GLint *height, GLint *depth,
+                     const struct gl_pixelstore_attrib *unpack,
+                     struct gl_pixelstore_attrib *unpackNew)
+{
+   assert(border > 0);  /* sanity check */
+
+   *unpackNew = *unpack;
+
+   if (unpackNew->RowLength == 0)
+      unpackNew->RowLength = *width;
+
+   if (depth && unpackNew->ImageHeight == 0)
+      unpackNew->ImageHeight = *height;
+
+   unpackNew->SkipPixels += border;
+   if (height)
+      unpackNew->SkipRows += border;
+   if (depth)
+      unpackNew->SkipImages += border;
+
+   assert(*width >= 3);
+   *width = *width - 2 * border;
+   if (height && *height >= 3)
+      *height = *height - 2 * border;
+   if (depth && *depth >= 3)
+      *depth = *depth - 2 * border;
+}
+
+
+/**
+ * Do glTexImage1/2/3D().
+ */
+static void
+st_TexImage(struct gl_context * ctx,
+            GLint dims,
+            GLenum target, GLint level,
+            GLint internalFormat,
+            GLint width, GLint height, GLint depth,
+            GLint border,
+            GLenum format, GLenum type, const void *pixels,
+            const struct gl_pixelstore_attrib *unpack,
+            struct gl_texture_object *texObj,
+            struct gl_texture_image *texImage,
+            GLsizei imageSize, GLboolean compressed_src)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_object *stObj = st_texture_object(texObj);
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   GLuint dstRowStride = 0;
+   struct gl_pixelstore_attrib unpackNB;
+   enum pipe_transfer_usage transfer_usage = 0;
+
+   DBG("%s target %s level %d %dx%dx%d border %d\n", __FUNCTION__,
+       _mesa_lookup_enum_by_nr(target), level, width, height, depth, border);
+
+   /* switch to "normal" */
+   if (stObj->surface_based) {
+      gl_format texFormat;
+
+      _mesa_clear_texture_object(ctx, texObj);
+      pipe_resource_reference(&stObj->pt, NULL);
+
+      /* oops, need to init this image again */
+      texFormat = _mesa_choose_texture_format(ctx, texObj, target, level,
+                                              internalFormat, format, type);
+
+      _mesa_init_teximage_fields(ctx, target, texImage,
+                                 width, height, depth, border,
+                                 internalFormat, texFormat);
+
+      stObj->surface_based = GL_FALSE;
+   }
+
+   /* gallium does not support texture borders, strip it off */
+   if (border) {
+      strip_texture_border(border, &width, &height, &depth, unpack, &unpackNB);
+      unpack = &unpackNB;
+      texImage->Width = width;
+      texImage->Height = height;
+      texImage->Depth = depth;
+      texImage->Border = 0;
+      border = 0;
+   }
+   else {
+      assert(texImage->Width == width);
+      assert(texImage->Height == height);
+      assert(texImage->Depth == depth);
+   }
+
+   stImage->face = _mesa_tex_target_to_face(target);
+   stImage->level = level;
+
+   _mesa_set_fetch_functions(texImage, dims);
+
+   /* Release the reference to a potentially orphaned buffer.   
+    * Release any old malloced memory.
+    */
+   if (stImage->pt) {
+      pipe_resource_reference(&stImage->pt, NULL);
+      assert(!texImage->Data);
+   }
+   else if (texImage->Data) {
+      _mesa_align_free(texImage->Data);
+   }
+
+   /*
+    * See if the new image is somehow incompatible with the existing
+    * mipmap.  If so, free the old mipmap.
+    */
+   if (stObj->pt) {
+      if (level > (GLint) stObj->pt->last_level ||
+          !st_texture_match_image(stObj->pt, &stImage->base,
+                                  stImage->face, stImage->level)) {
+         DBG("release it\n");
+         pipe_resource_reference(&stObj->pt, NULL);
+         assert(!stObj->pt);
+         pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+      }
+   }
+
+   if (width == 0 || height == 0 || depth == 0) {
+      /* stop after freeing old image */
+      return;
+   }
+
+   if (!stObj->pt) {
+      if (!guess_and_alloc_texture(st, stObj, stImage)) {
+         /* Probably out of memory.
+          * Try flushing any pending rendering, then retry.
+          */
+         st_finish(st);
+         if (!guess_and_alloc_texture(st, stObj, stImage)) {
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
+            return;
+         }
+      }
+   }
+
+   assert(!stImage->pt);
+
+   /* Check if this texture image can live inside the texture object's buffer.
+    * If so, store the image there.  Otherwise the image will temporarily live
+    * in its own buffer.
+    */
+   if (stObj->pt &&
+       st_texture_match_image(stObj->pt, &stImage->base,
+                              stImage->face, stImage->level)) {
+
+      pipe_resource_reference(&stImage->pt, stObj->pt);
+      assert(stImage->pt);
+   }
+
+   if (!stImage->pt)
+      DBG("XXX: Image did not fit into texture - storing in local memory!\n");
+
+   /* Pixel data may come from regular user memory or a PBO.  For the later,
+    * do bounds checking and map the PBO to read pixels data from it.
+    *
+    * XXX we should try to use a GPU-accelerated path to copy the image data
+    * from the PBO to the texture.
+    */
+   if (compressed_src) {
+      pixels = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, pixels,
+						      unpack,
+						      "glCompressedTexImage");
+   }
+   else {
+      pixels = _mesa_validate_pbo_teximage(ctx, dims, width, height, 1,
+					   format, type,
+					   pixels, unpack, "glTexImage");
+   }
+
+   /* for a 1D array upload the image as a series of layer with height = 1 */
+   if (target == GL_TEXTURE_1D_ARRAY) {
+      depth = height;
+      height = 1;
+   }
+
+   /*
+    * Prepare to store the texture data.  Either map the gallium texture buffer
+    * memory or malloc space for it.
+    */
+   if (stImage->pt) {
+      /* Store the image in the gallium texture memory buffer */
+      if (format == GL_DEPTH_COMPONENT &&
+          util_format_is_depth_and_stencil(stImage->pt->format))
+         transfer_usage = PIPE_TRANSFER_READ_WRITE;
+      else
+         transfer_usage = PIPE_TRANSFER_WRITE;
+
+      texImage->Data = st_texture_image_map(st, stImage, 0,
+                                            transfer_usage, 0, 0, width, height);
+      if(stImage->transfer)
+         dstRowStride = stImage->transfer->stride;
+   }
+   else {
+      /* Allocate regular memory and store the image there temporarily.   */
+      GLuint imageSize = _mesa_format_image_size(texImage->TexFormat,
+                                                 width, height, depth);
+      dstRowStride = _mesa_format_row_stride(texImage->TexFormat, width);
+
+      texImage->Data = _mesa_align_malloc(imageSize, 16);
+   }
+
+   if (!texImage->Data) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
+      return;
+   }
+
+   if (!pixels) {
+      /* We've allocated texture memory, but have no pixel data - all done. */
+      goto done;
+   }
+
+   DBG("Upload image %dx%dx%d row_len %x pitch %x\n",
+       width, height, depth, width, dstRowStride);
+
+   /* Copy user texture image into the texture buffer.
+    */
+   if (compressed_src) {
+      const GLuint srcRowStride =
+         _mesa_format_row_stride(texImage->TexFormat, width);
+      if (dstRowStride == srcRowStride) {
+         memcpy(texImage->Data, pixels, imageSize);
+      }
+      else {
+         char *dst = texImage->Data;
+         const char *src = pixels;
+         GLuint i, bw, bh, lines;
+         _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
+         lines = (height + bh - 1) / bh;
+
+         for (i = 0; i < lines; ++i) {
+            memcpy(dst, src, srcRowStride);
+            dst += dstRowStride;
+            src += srcRowStride;
+         }
+      }
+   }
+   else {
+      const GLuint srcImageStride =
+         _mesa_image_image_stride(unpack, width, height, format, type);
+      GLint i;
+      const GLubyte *src = (const GLubyte *) pixels;
+
+      for (i = 0; i < depth; i++) {
+	 if (!_mesa_texstore(ctx, dims, 
+                             texImage->_BaseFormat, 
+                             texImage->TexFormat, 
+                             texImage->Data,
+                             0, 0, 0, /* dstX/Y/Zoffset */
+                             dstRowStride,
+                             texImage->ImageOffsets,
+                             width, height, 1,
+                             format, type, src, unpack)) {
+	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
+	 }
+
+	 if (stImage->pt && i + 1 < depth) {
+            /* unmap this slice */
+	    st_texture_image_unmap(st, stImage);
+            /* map next slice of 3D texture */
+	    texImage->Data = st_texture_image_map(st, stImage, i + 1,
+                                                  transfer_usage, 0, 0,
+                                                  width, height);
+	    src += srcImageStride;
+	 }
+      }
+   }
+
+done:
+   _mesa_unmap_teximage_pbo(ctx, unpack);
+
+   if (stImage->pt && texImage->Data) {
+      st_texture_image_unmap(st, stImage);
+      texImage->Data = NULL;
+   }
+}
+
+
+static void
+st_TexImage3D(struct gl_context * ctx,
+              GLenum target, GLint level,
+              GLint internalFormat,
+              GLint width, GLint height, GLint depth,
+              GLint border,
+              GLenum format, GLenum type, const void *pixels,
+              const struct gl_pixelstore_attrib *unpack,
+              struct gl_texture_object *texObj,
+              struct gl_texture_image *texImage)
+{
+   st_TexImage(ctx, 3, target, level, internalFormat, width, height, depth,
+               border, format, type, pixels, unpack, texObj, texImage,
+               0, GL_FALSE);
+}
+
+
+static void
+st_TexImage2D(struct gl_context * ctx,
+              GLenum target, GLint level,
+              GLint internalFormat,
+              GLint width, GLint height, GLint border,
+              GLenum format, GLenum type, const void *pixels,
+              const struct gl_pixelstore_attrib *unpack,
+              struct gl_texture_object *texObj,
+              struct gl_texture_image *texImage)
+{
+   st_TexImage(ctx, 2, target, level, internalFormat, width, height, 1, border,
+               format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);
+}
+
+
+static void
+st_TexImage1D(struct gl_context * ctx,
+              GLenum target, GLint level,
+              GLint internalFormat,
+              GLint width, GLint border,
+              GLenum format, GLenum type, const void *pixels,
+              const struct gl_pixelstore_attrib *unpack,
+              struct gl_texture_object *texObj,
+              struct gl_texture_image *texImage)
+{
+   st_TexImage(ctx, 1, target, level, internalFormat, width, 1, 1, border,
+               format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);
+}
+
+
+static void
+st_CompressedTexImage2D(struct gl_context *ctx, GLenum target, GLint level,
+                        GLint internalFormat,
+                        GLint width, GLint height, GLint border,
+                        GLsizei imageSize, const GLvoid *data,
+                        struct gl_texture_object *texObj,
+                        struct gl_texture_image *texImage)
+{
+   st_TexImage(ctx, 2, target, level, internalFormat, width, height, 1, border,
+               0, 0, data, &ctx->Unpack, texObj, texImage, imageSize, GL_TRUE);
+}
+
+
+
+/**
+ * glGetTexImage() helper: decompress a compressed texture by rendering
+ * a textured quad.  Store the results in the user's buffer.
+ */
+static void
+decompress_with_blit(struct gl_context * ctx, GLenum target, GLint level,
+                     GLenum format, GLenum type, GLvoid *pixels,
+                     struct gl_texture_object *texObj,
+                     struct gl_texture_image *texImage)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   struct st_texture_object *stObj = st_texture_object(texObj);
+   struct pipe_sampler_view *src_view =
+      st_get_texture_sampler_view(stObj, pipe);
+   const GLuint width = texImage->Width;
+   const GLuint height = texImage->Height;
+   struct pipe_surface *dst_surface;
+   struct pipe_resource *dst_texture;
+   struct pipe_transfer *tex_xfer;
+   unsigned bind = (PIPE_BIND_RENDER_TARGET | /* util_blit may choose to render */
+		    PIPE_BIND_TRANSFER_READ);
+
+   /* create temp / dest surface */
+   if (!util_create_rgba_surface(pipe, width, height, bind,
+                                 &dst_texture, &dst_surface)) {
+      _mesa_problem(ctx, "util_create_rgba_surface() failed "
+                    "in decompress_with_blit()");
+      return;
+   }
+
+   /* blit/render/decompress */
+   util_blit_pixels_tex(st->blit,
+                        src_view,      /* pipe_resource (src) */
+                        0, 0,             /* src x0, y0 */
+                        width, height,    /* src x1, y1 */
+                        dst_surface,      /* pipe_surface (dst) */
+                        0, 0,             /* dst x0, y0 */
+                        width, height,    /* dst x1, y1 */
+                        0.0,              /* z */
+                        PIPE_TEX_MIPFILTER_NEAREST);
+
+   /* map the dst_surface so we can read from it */
+   tex_xfer = pipe_get_transfer(st_context(ctx)->pipe,
+                                dst_texture, 0, 0,
+                                PIPE_TRANSFER_READ,
+                                0, 0, width, height);
+
+   pixels = _mesa_map_pbo_dest(ctx, &ctx->Pack, pixels);
+
+   /* copy/pack data into user buffer */
+   if (st_equal_formats(stImage->pt->format, format, type)) {
+      /* memcpy */
+      const uint bytesPerRow = width * util_format_get_blocksize(stImage->pt->format);
+      ubyte *map = pipe_transfer_map(pipe, tex_xfer);
+      GLuint row;
+      for (row = 0; row < height; row++) {
+         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
+                                              height, format, type, row, 0);
+         memcpy(dest, map, bytesPerRow);
+         map += tex_xfer->stride;
+      }
+      pipe_transfer_unmap(pipe, tex_xfer);
+   }
+   else {
+      /* format translation via floats */
+      GLuint row;
+      enum pipe_format format = util_format_linear(dst_texture->format);
+      for (row = 0; row < height; row++) {
+         const GLbitfield transferOps = 0x0; /* bypassed for glGetTexImage() */
+         GLfloat rgba[4 * MAX_WIDTH];
+         GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
+                                              height, format, type, row, 0);
+
+         if (ST_DEBUG & DEBUG_FALLBACK)
+            debug_printf("%s: fallback format translation\n", __FUNCTION__);
+
+         /* get float[4] rgba row from surface */
+         pipe_get_tile_rgba_format(pipe, tex_xfer, 0, row, width, 1,
+                                   format, rgba);
+
+         _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format,
+                                    type, dest, &ctx->Pack, transferOps);
+      }
+   }
+
+   _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
+
+   pipe->transfer_destroy(pipe, tex_xfer);
+
+   /* destroy the temp / dest surface */
+   util_destroy_rgba_surface(dst_texture, dst_surface);
+}
+
+
+
+/**
+ * Need to map texture image into memory before copying image data,
+ * then unmap it.
+ */
+static void
+st_get_tex_image(struct gl_context * ctx, GLenum target, GLint level,
+                 GLenum format, GLenum type, GLvoid * pixels,
+                 struct gl_texture_object *texObj,
+                 struct gl_texture_image *texImage, GLboolean compressed_dst)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   const GLuint dstImageStride =
+      _mesa_image_image_stride(&ctx->Pack, texImage->Width, texImage->Height,
+                               format, type);
+   GLuint depth, i;
+   GLubyte *dest;
+
+   if (stImage->pt &&
+       util_format_is_s3tc(stImage->pt->format) &&
+       !compressed_dst) {
+      /* Need to decompress the texture.
+       * We'll do this by rendering a textured quad.
+       * Note that we only expect RGBA formats (no Z/depth formats).
+       */
+      decompress_with_blit(ctx, target, level, format, type, pixels,
+                           texObj, texImage);
+      return;
+   }
+
+   /* Map */
+   if (stImage->pt) {
+      /* Image is stored in hardware format in a buffer managed by the
+       * kernel.  Need to explicitly map and unmap it.
+       */
+      texImage->Data = st_texture_image_map(st, stImage, 0,
+                                            PIPE_TRANSFER_READ, 0, 0,
+                                            stImage->base.Width,
+                                            stImage->base.Height);
+      /* compute stride in texels from stride in bytes */
+      texImage->RowStride = stImage->transfer->stride
+         * util_format_get_blockwidth(stImage->pt->format)
+         / util_format_get_blocksize(stImage->pt->format);
+   }
+   else {
+      /* Otherwise, the image should actually be stored in
+       * texImage->Data.  This is pretty confusing for
+       * everybody, I'd much prefer to separate the two functions of
+       * texImage->Data - storage for texture images in main memory
+       * and access (ie mappings) of images.  In other words, we'd
+       * create a new texImage->Map field and leave Data simply for
+       * storage.
+       */
+      assert(texImage->Data);
+   }
+
+   depth = texImage->Depth;
+   texImage->Depth = 1;
+
+   dest = (GLubyte *) pixels;
+
+   _mesa_set_fetch_functions(texImage, get_texture_dims(target));
+
+   for (i = 0; i < depth; i++) {
+      if (compressed_dst) {
+	 _mesa_get_compressed_teximage(ctx, target, level, dest,
+				       texObj, texImage);
+      }
+      else {
+	 _mesa_get_teximage(ctx, target, level, format, type, dest,
+			    texObj, texImage);
+      }
+
+      if (stImage->pt && i + 1 < depth) {
+         /* unmap this slice */
+	 st_texture_image_unmap(st, stImage);
+         /* map next slice of 3D texture */
+	 texImage->Data = st_texture_image_map(st, stImage, i + 1,
+                                               PIPE_TRANSFER_READ, 0, 0,
+                                               stImage->base.Width,
+                                               stImage->base.Height);
+	 dest += dstImageStride;
+      }
+   }
+
+   texImage->Depth = depth;
+
+   /* Unmap */
+   if (stImage->pt) {
+      st_texture_image_unmap(st, stImage);
+      texImage->Data = NULL;
+   }
+}
+
+
+static void
+st_GetTexImage(struct gl_context * ctx, GLenum target, GLint level,
+               GLenum format, GLenum type, GLvoid * pixels,
+               struct gl_texture_object *texObj,
+               struct gl_texture_image *texImage)
+{
+   st_get_tex_image(ctx, target, level, format, type, pixels, texObj, texImage,
+                    GL_FALSE);
+}
+
+
+static void
+st_GetCompressedTexImage(struct gl_context *ctx, GLenum target, GLint level,
+                         GLvoid *pixels,
+                         struct gl_texture_object *texObj,
+                         struct gl_texture_image *texImage)
+{
+   st_get_tex_image(ctx, target, level, 0, 0, pixels, texObj, texImage,
+                    GL_TRUE);
+}
+
+
+
+static void
+st_TexSubimage(struct gl_context *ctx, GLint dims, GLenum target, GLint level,
+               GLint xoffset, GLint yoffset, GLint zoffset,
+               GLint width, GLint height, GLint depth,
+               GLenum format, GLenum type, const void *pixels,
+               const struct gl_pixelstore_attrib *packing,
+               struct gl_texture_object *texObj,
+               struct gl_texture_image *texImage)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   GLuint dstRowStride;
+   const GLuint srcImageStride =
+      _mesa_image_image_stride(packing, width, height, format, type);
+   GLint i;
+   const GLubyte *src;
+   /* init to silence warning only: */
+   enum pipe_transfer_usage transfer_usage = PIPE_TRANSFER_WRITE;
+
+   DBG("%s target %s level %d offset %d,%d %dx%d\n", __FUNCTION__,
+       _mesa_lookup_enum_by_nr(target),
+       level, xoffset, yoffset, width, height);
+
+   pixels =
+      _mesa_validate_pbo_teximage(ctx, dims, width, height, depth, format,
+                                  type, pixels, packing, "glTexSubImage2D");
+   if (!pixels)
+      return;
+
+   /* for a 1D array upload the image as a series of layer with height = 1 */
+   if (target == GL_TEXTURE_1D_ARRAY) {
+      depth = height;
+      height = 1;
+   }
+
+   /* Map buffer if necessary.  Need to lock to prevent other contexts
+    * from uploading the buffer under us.
+    */
+   if (stImage->pt) {
+      if (format == GL_DEPTH_COMPONENT &&
+          util_format_is_depth_and_stencil(stImage->pt->format))
+         transfer_usage = PIPE_TRANSFER_READ_WRITE;
+      else
+         transfer_usage = PIPE_TRANSFER_WRITE;
+
+      texImage->Data = st_texture_image_map(st, stImage, zoffset, 
+                                            transfer_usage,
+                                            xoffset, yoffset,
+                                            width, height);
+   }
+
+   if (!texImage->Data) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");
+      goto done;
+   }
+
+   src = (const GLubyte *) pixels;
+   dstRowStride = stImage->transfer->stride;
+
+   for (i = 0; i < depth; i++) {
+      if (!_mesa_texstore(ctx, dims, texImage->_BaseFormat,
+                          texImage->TexFormat,
+                          texImage->Data,
+                          0, 0, 0,
+                          dstRowStride,
+                          texImage->ImageOffsets,
+                          width, height, 1,
+                          format, type, src, packing)) {
+	 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");
+      }
+
+      if (stImage->pt && i + 1 < depth) {
+         /* unmap this slice */
+	 st_texture_image_unmap(st, stImage);
+         /* map next slice of 3D texture */
+	 texImage->Data = st_texture_image_map(st, stImage,
+                                               zoffset + i + 1,
+                                               transfer_usage,
+                                               xoffset, yoffset,
+                                               width, height);
+	 src += srcImageStride;
+      }
+   }
+
+done:
+   _mesa_unmap_teximage_pbo(ctx, packing);
+
+   if (stImage->pt && texImage->Data) {
+      st_texture_image_unmap(st, stImage);
+      texImage->Data = NULL;
+   }
+}
+
+
+
+static void
+st_TexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,
+                 GLint xoffset, GLint yoffset, GLint zoffset,
+                 GLsizei width, GLsizei height, GLsizei depth,
+                 GLenum format, GLenum type, const GLvoid *pixels,
+                 const struct gl_pixelstore_attrib *packing,
+                 struct gl_texture_object *texObj,
+                 struct gl_texture_image *texImage)
+{
+   st_TexSubimage(ctx, 3, target, level, xoffset, yoffset, zoffset,
+                  width, height, depth, format, type,
+                  pixels, packing, texObj, texImage);
+}
+
+
+static void
+st_TexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,
+                 GLint xoffset, GLint yoffset,
+                 GLsizei width, GLsizei height,
+                 GLenum format, GLenum type, const GLvoid * pixels,
+                 const struct gl_pixelstore_attrib *packing,
+                 struct gl_texture_object *texObj,
+                 struct gl_texture_image *texImage)
+{
+   st_TexSubimage(ctx, 2, target, level, xoffset, yoffset, 0,
+                  width, height, 1, format, type,
+                  pixels, packing, texObj, texImage);
+}
+
+
+static void
+st_TexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,
+                 GLint xoffset, GLsizei width, GLenum format, GLenum type,
+                 const GLvoid * pixels,
+                 const struct gl_pixelstore_attrib *packing,
+                 struct gl_texture_object *texObj,
+                 struct gl_texture_image *texImage)
+{
+   st_TexSubimage(ctx, 1, target, level, xoffset, 0, 0, width, 1, 1,
+                  format, type, pixels, packing, texObj, texImage);
+}
+
+
+static void
+st_CompressedTexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,
+                           GLint xoffset, GLsizei width,
+                           GLenum format,
+                           GLsizei imageSize, const GLvoid *data,
+                           struct gl_texture_object *texObj,
+                           struct gl_texture_image *texImage)
+{
+   assert(0);
+}
+
+
+static void
+st_CompressedTexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,
+                           GLint xoffset, GLint yoffset,
+                           GLsizei width, GLint height,
+                           GLenum format,
+                           GLsizei imageSize, const GLvoid *data,
+                           struct gl_texture_object *texObj,
+                           struct gl_texture_image *texImage)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   int srcBlockStride;
+   int dstBlockStride;
+   int y;
+   enum pipe_format pformat;
+
+   if (stImage->pt) {
+      pformat = stImage->pt->format;
+
+      texImage->Data = st_texture_image_map(st, stImage, 0, 
+                                            PIPE_TRANSFER_WRITE,
+                                            xoffset, yoffset,
+                                            width, height);
+      
+      srcBlockStride = util_format_get_stride(pformat, width);
+      dstBlockStride = stImage->transfer->stride;
+   } else {
+      assert(stImage->pt);
+      /* TODO find good values for block and strides */
+      /* TODO also adjust texImage->data for yoffset/xoffset */
+      return;
+   }
+
+   if (!texImage->Data) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexSubImage");
+      return;
+   }
+
+   assert(xoffset % util_format_get_blockwidth(pformat) == 0);
+   assert(yoffset % util_format_get_blockheight(pformat) == 0);
+
+   for (y = 0; y < height; y += util_format_get_blockheight(pformat)) {
+      /* don't need to adjust for xoffset and yoffset as st_texture_image_map does that */
+      const char *src = (const char*)data + srcBlockStride * util_format_get_nblocksy(pformat, y);
+      char *dst = (char*)texImage->Data + dstBlockStride * util_format_get_nblocksy(pformat, y);
+      memcpy(dst, src, util_format_get_stride(pformat, width));
+   }
+
+   if (stImage->pt) {
+      st_texture_image_unmap(st, stImage);
+      texImage->Data = NULL;
+   }
+}
+
+
+static void
+st_CompressedTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,
+                           GLint xoffset, GLint yoffset, GLint zoffset,
+                           GLsizei width, GLint height, GLint depth,
+                           GLenum format,
+                           GLsizei imageSize, const GLvoid *data,
+                           struct gl_texture_object *texObj,
+                           struct gl_texture_image *texImage)
+{
+   assert(0);
+}
+
+
+
+/**
+ * Do a CopyTexSubImage operation using a read transfer from the source,
+ * a write transfer to the destination and get_tile()/put_tile() to access
+ * the pixels/texels.
+ *
+ * Note: srcY=0=TOP of renderbuffer
+ */
+static void
+fallback_copy_texsubimage(struct gl_context *ctx, GLenum target, GLint level,
+                          struct st_renderbuffer *strb,
+                          struct st_texture_image *stImage,
+                          GLenum baseFormat,
+                          GLint destX, GLint destY, GLint destZ,
+                          GLint srcX, GLint srcY,
+                          GLsizei width, GLsizei height)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_transfer *src_trans;
+   GLvoid *texDest;
+   enum pipe_transfer_usage transfer_usage;
+
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
+
+   assert(width <= MAX_WIDTH);
+
+   if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
+      srcY = strb->Base.Height - srcY - height;
+   }
+
+   src_trans = pipe_get_transfer(st_context(ctx)->pipe,
+                                 strb->texture,
+                                 0, 0,
+                                 PIPE_TRANSFER_READ,
+                                 srcX, srcY,
+                                 width, height);
+
+   if ((baseFormat == GL_DEPTH_COMPONENT ||
+        baseFormat == GL_DEPTH_STENCIL) &&
+       util_format_is_depth_and_stencil(stImage->pt->format))
+      transfer_usage = PIPE_TRANSFER_READ_WRITE;
+   else
+      transfer_usage = PIPE_TRANSFER_WRITE;
+
+   /* XXX this used to ignore destZ param */
+   texDest = st_texture_image_map(st, stImage, destZ, transfer_usage,
+                                  destX, destY, width, height);
+
+   if (baseFormat == GL_DEPTH_COMPONENT ||
+       baseFormat == GL_DEPTH_STENCIL) {
+      const GLboolean scaleOrBias = (ctx->Pixel.DepthScale != 1.0F ||
+                                     ctx->Pixel.DepthBias != 0.0F);
+      GLint row, yStep;
+
+      /* determine bottom-to-top vs. top-to-bottom order for src buffer */
+      if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
+         srcY = height - 1;
+         yStep = -1;
+      }
+      else {
+         srcY = 0;
+         yStep = 1;
+      }
+
+      /* To avoid a large temp memory allocation, do copy row by row */
+      for (row = 0; row < height; row++, srcY += yStep) {
+         uint data[MAX_WIDTH];
+         pipe_get_tile_z(pipe, src_trans, 0, srcY, width, 1, data);
+         if (scaleOrBias) {
+            _mesa_scale_and_bias_depth_uint(ctx, width, data);
+         }
+         pipe_put_tile_z(pipe, stImage->transfer, 0, row, width, 1, data);
+      }
+   }
+   else {
+      /* RGBA format */
+      GLfloat *tempSrc =
+         (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
+
+      if (tempSrc && texDest) {
+         const GLint dims = 2;
+         const GLint dstRowStride = stImage->transfer->stride;
+         struct gl_texture_image *texImage = &stImage->base;
+         struct gl_pixelstore_attrib unpack = ctx->DefaultPacking;
+
+         if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
+            unpack.Invert = GL_TRUE;
+         }
+
+         /* get float/RGBA image from framebuffer */
+         /* XXX this usually involves a lot of int/float conversion.
+          * try to avoid that someday.
+          */
+         pipe_get_tile_rgba_format(pipe, src_trans, 0, 0, width, height,
+                                   util_format_linear(strb->texture->format),
+                                   tempSrc);
+
+         /* Store into texture memory.
+          * Note that this does some special things such as pixel transfer
+          * ops and format conversion.  In particular, if the dest tex format
+          * is actually RGBA but the user created the texture as GL_RGB we
+          * need to fill-in/override the alpha channel with 1.0.
+          */
+         _mesa_texstore(ctx, dims,
+                        texImage->_BaseFormat, 
+                        texImage->TexFormat, 
+                        texDest,
+                        0, 0, 0,
+                        dstRowStride,
+                        texImage->ImageOffsets,
+                        width, height, 1,
+                        GL_RGBA, GL_FLOAT, tempSrc, /* src */
+                        &unpack);
+      }
+      else {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");
+      }
+
+      if (tempSrc)
+         free(tempSrc);
+   }
+
+   st_texture_image_unmap(st, stImage);
+   pipe->transfer_destroy(pipe, src_trans);
+}
+
+
+
+/**
+ * If the format of the src renderbuffer and the format of the dest
+ * texture are compatible (in terms of blitting), return a TGSI writemask
+ * to be used during the blit.
+ * If the src/dest are incompatible, return 0.
+ */
+static unsigned
+compatible_src_dst_formats(struct gl_context *ctx,
+                           const struct gl_renderbuffer *src,
+                           const struct gl_texture_image *dst)
+{
+   /* Get logical base formats for the src and dest.
+    * That is, use the user-requested formats and not the actual, device-
+    * chosen formats.
+    * For example, the user may have requested an A8 texture but the
+    * driver may actually be using an RGBA texture format.  When we
+    * copy/blit to that texture, we only want to copy the Alpha channel
+    * and not the RGB channels.
+    *
+    * Similarly, when the src FBO was created an RGB format may have been
+    * requested but the driver actually chose an RGBA format.  In that case,
+    * we don't want to copy the undefined Alpha channel to the dest texture
+    * (it should be 1.0).
+    */
+   const GLenum srcFormat = _mesa_base_fbo_format(ctx, src->InternalFormat);
+   const GLenum dstFormat = _mesa_base_tex_format(ctx, dst->InternalFormat);
+
+   /**
+    * XXX when we have red-only and red/green renderbuffers we'll need
+    * to add more cases here (or implement a general-purpose routine that
+    * queries the existance of the R,G,B,A channels in the src and dest).
+    */
+   if (srcFormat == dstFormat) {
+      /* This is the same as matching_base_formats, which should
+       * always pass, as it did previously.
+       */
+      return TGSI_WRITEMASK_XYZW;
+   }
+   else if (srcFormat == GL_RGB && dstFormat == GL_RGBA) {
+      /* Make sure that A in the dest is 1.  The actual src format
+       * may be RGBA and have undefined A values.
+       */
+      return TGSI_WRITEMASK_XYZ;
+   }
+   else if (srcFormat == GL_RGBA && dstFormat == GL_RGB) {
+      /* Make sure that A in the dest is 1.  The actual dst format
+       * may be RGBA and will need A=1 to provide proper alpha values
+       * when sampled later.
+       */
+      return TGSI_WRITEMASK_XYZ;
+   }
+   else {
+      if (ST_DEBUG & DEBUG_FALLBACK)
+         debug_printf("%s failed for src %s, dst %s\n",
+                      __FUNCTION__, 
+                      _mesa_lookup_enum_by_nr(srcFormat),
+                      _mesa_lookup_enum_by_nr(dstFormat));
+
+      /* Otherwise fail.
+       */
+      return 0;
+   }
+}
+
+
+
+/**
+ * Do a CopyTex[Sub]Image1/2/3D() using a hardware (blit) path if possible.
+ * Note that the region to copy has already been clipped so we know we
+ * won't read from outside the source renderbuffer's bounds.
+ *
+ * Note: srcY=0=Bottom of renderbuffer (GL convention)
+ */
+static void
+st_copy_texsubimage(struct gl_context *ctx,
+                    GLenum target, GLint level,
+                    GLint destX, GLint destY, GLint destZ,
+                    GLint srcX, GLint srcY,
+                    GLsizei width, GLsizei height)
+{
+   struct gl_texture_unit *texUnit =
+      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   struct gl_texture_object *texObj =
+      _mesa_select_tex_object(ctx, texUnit, target);
+   struct gl_texture_image *texImage =
+      _mesa_select_tex_image(ctx, texObj, target, level);
+   struct st_texture_image *stImage = st_texture_image(texImage);
+   const GLenum texBaseFormat = texImage->_BaseFormat;
+   struct gl_framebuffer *fb = ctx->ReadBuffer;
+   struct st_renderbuffer *strb;
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   enum pipe_format dest_format, src_format;
+   GLboolean use_fallback = GL_TRUE;
+   GLboolean matching_base_formats;
+   GLuint format_writemask, sample_count;
+   struct pipe_surface *dest_surface = NULL;
+   GLboolean do_flip = (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP);
+
+   /* make sure finalize_textures has been called? 
+    */
+   if (0) st_validate_state(st);
+
+   /* determine if copying depth or color data */
+   if (texBaseFormat == GL_DEPTH_COMPONENT ||
+       texBaseFormat == GL_DEPTH_STENCIL) {
+      strb = st_renderbuffer(fb->_DepthBuffer);
+      if (strb->Base.Wrapped) {
+         strb = st_renderbuffer(strb->Base.Wrapped);
+      }
+   }
+   else {
+      /* texBaseFormat == GL_RGB, GL_RGBA, GL_ALPHA, etc */
+      strb = st_renderbuffer(fb->_ColorReadBuffer);
+   }
+
+   if (!strb || !strb->surface || !stImage->pt) {
+      debug_printf("%s: null strb or stImage\n", __FUNCTION__);
+      return;
+   }
+
+   sample_count = strb->surface->texture->nr_samples;
+   /* I believe this would be legal, presumably would need to do a resolve
+      for color, and for depth/stencil spec says to just use one of the
+      depth/stencil samples per pixel? Need some transfer clarifications. */
+   assert(sample_count < 2);
+
+   if (srcX < 0) {
+      width -= -srcX;
+      destX += -srcX;
+      srcX = 0;
+   }
+
+   if (srcY < 0) {
+      height -= -srcY;
+      destY += -srcY;
+      srcY = 0;
+   }
+
+   if (destX < 0) {
+      width -= -destX;
+      srcX += -destX;
+      destX = 0;
+   }
+
+   if (destY < 0) {
+      height -= -destY;
+      srcY += -destY;
+      destY = 0;
+   }
+
+   if (width < 0 || height < 0)
+      return;
+
+
+   assert(strb);
+   assert(strb->surface);
+   assert(stImage->pt);
+
+   src_format = strb->surface->format;
+   dest_format = stImage->pt->format;
+
+   /*
+    * Determine if the src framebuffer and dest texture have the same
+    * base format.  We need this to detect a case such as the framebuffer
+    * being GL_RGBA but the texture being GL_RGB.  If the actual hardware
+    * texture format stores RGBA we need to set A=1 (overriding the
+    * framebuffer's alpha values).  We can't do that with the blit or
+    * textured-quad paths.
+    */
+   matching_base_formats =
+      (_mesa_get_format_base_format(strb->Base.Format) ==
+       _mesa_get_format_base_format(texImage->TexFormat));
+   format_writemask = compatible_src_dst_formats(ctx, &strb->Base, texImage);
+
+   if (ctx->_ImageTransferState == 0x0) {
+
+      if (matching_base_formats &&
+          src_format == dest_format &&
+          !do_flip)
+      {
+         /* use surface_copy() / blit */
+         struct pipe_box src_box;
+         u_box_2d_zslice(srcX, srcY, strb->surface->u.tex.first_layer,
+                         width, height, &src_box);
+
+         /* for resource_copy_region(), y=0=top, always */
+         pipe->resource_copy_region(pipe,
+                                    /* dest */
+                                    stImage->pt,
+                                    stImage->level,
+                                    destX, destY, destZ + stImage->face,
+                                    /* src */
+                                    strb->texture,
+                                    strb->surface->u.tex.level,
+                                    &src_box);
+         use_fallback = GL_FALSE;
+      }
+      else if (format_writemask &&
+               texBaseFormat != GL_DEPTH_COMPONENT &&
+               texBaseFormat != GL_DEPTH_STENCIL &&
+               screen->is_format_supported(screen, src_format,
+                                           PIPE_TEXTURE_2D, sample_count,
+                                           PIPE_BIND_SAMPLER_VIEW) &&
+               screen->is_format_supported(screen, dest_format,
+                                           PIPE_TEXTURE_2D, 0,
+                                           PIPE_BIND_RENDER_TARGET)) {
+         /* draw textured quad to do the copy */
+         GLint srcY0, srcY1;
+         struct pipe_surface surf_tmpl;
+         memset(&surf_tmpl, 0, sizeof(surf_tmpl));
+         surf_tmpl.format = util_format_linear(stImage->pt->format);
+         surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
+         surf_tmpl.u.tex.level = stImage->level;
+         surf_tmpl.u.tex.first_layer = stImage->face + destZ;
+         surf_tmpl.u.tex.last_layer = stImage->face + destZ;
+
+         dest_surface = pipe->create_surface(pipe, stImage->pt,
+                                             &surf_tmpl);
+
+         if (do_flip) {
+            srcY1 = strb->Base.Height - srcY - height;
+            srcY0 = srcY1 + height;
+         }
+         else {
+            srcY0 = srcY;
+            srcY1 = srcY0 + height;
+         }
+
+         util_blit_pixels_writemask(st->blit,
+                                    strb->texture,
+                                    strb->surface->u.tex.level,
+                                    srcX, srcY0,
+                                    srcX + width, srcY1,
+                                    strb->surface->u.tex.first_layer,
+                                    dest_surface,
+                                    destX, destY,
+                                    destX + width, destY + height,
+                                    0.0, PIPE_TEX_MIPFILTER_NEAREST,
+                                    format_writemask);
+         use_fallback = GL_FALSE;
+      }
+
+      if (dest_surface)
+         pipe_surface_reference(&dest_surface, NULL);
+   }
+
+   if (use_fallback) {
+      /* software fallback */
+      fallback_copy_texsubimage(ctx, target, level,
+                                strb, stImage, texBaseFormat,
+                                destX, destY, destZ,
+                                srcX, srcY, width, height);
+   }
+}
+
+
+
+static void
+st_CopyTexImage1D(struct gl_context * ctx, GLenum target, GLint level,
+                  GLenum internalFormat,
+                  GLint x, GLint y, GLsizei width, GLint border)
+{
+   struct gl_texture_unit *texUnit =
+      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   struct gl_texture_object *texObj =
+      _mesa_select_tex_object(ctx, texUnit, target);
+   struct gl_texture_image *texImage =
+      _mesa_select_tex_image(ctx, texObj, target, level);
+
+   /* Setup or redefine the texture object, texture and texture
+    * image.  Don't populate yet.  
+    */
+   ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
+                          width, border,
+                          GL_RGBA, CHAN_TYPE, NULL,
+                          &ctx->DefaultPacking, texObj, texImage);
+
+   st_copy_texsubimage(ctx, target, level,
+                       0, 0, 0,  /* destX,Y,Z */
+                       x, y, width, 1);  /* src X, Y, size */
+}
+
+
+static void
+st_CopyTexImage2D(struct gl_context * ctx, GLenum target, GLint level,
+                  GLenum internalFormat,
+                  GLint x, GLint y, GLsizei width, GLsizei height,
+                  GLint border)
+{
+   struct gl_texture_unit *texUnit =
+      &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   struct gl_texture_object *texObj =
+      _mesa_select_tex_object(ctx, texUnit, target);
+   struct gl_texture_image *texImage =
+      _mesa_select_tex_image(ctx, texObj, target, level);
+
+   /* Setup or redefine the texture object, texture and texture
+    * image.  Don't populate yet.  
+    */
+   ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
+                          width, height, border,
+                          GL_RGBA, CHAN_TYPE, NULL,
+                          &ctx->DefaultPacking, texObj, texImage);
+
+   st_copy_texsubimage(ctx, target, level,
+                       0, 0, 0,  /* destX,Y,Z */
+                       x, y, width, height);  /* src X, Y, size */
+}
+
+
+static void
+st_CopyTexSubImage1D(struct gl_context * ctx, GLenum target, GLint level,
+                     GLint xoffset, GLint x, GLint y, GLsizei width)
+{
+   const GLint yoffset = 0, zoffset = 0;
+   const GLsizei height = 1;
+   st_copy_texsubimage(ctx, target, level,
+                       xoffset, yoffset, zoffset,  /* destX,Y,Z */
+                       x, y, width, height);  /* src X, Y, size */
+}
+
+
+static void
+st_CopyTexSubImage2D(struct gl_context * ctx, GLenum target, GLint level,
+                     GLint xoffset, GLint yoffset,
+                     GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   const GLint zoffset = 0;
+   st_copy_texsubimage(ctx, target, level,
+                       xoffset, yoffset, zoffset,  /* destX,Y,Z */
+                       x, y, width, height);  /* src X, Y, size */
+}
+
+
+static void
+st_CopyTexSubImage3D(struct gl_context * ctx, GLenum target, GLint level,
+                     GLint xoffset, GLint yoffset, GLint zoffset,
+                     GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   st_copy_texsubimage(ctx, target, level,
+                       xoffset, yoffset, zoffset,  /* destX,Y,Z */
+                       x, y, width, height);  /* src X, Y, size */
+}
+
+
+/**
+ * Copy image data from stImage into the texture object 'stObj' at level
+ * 'dstLevel'.
+ */
+static void
+copy_image_data_to_texture(struct st_context *st,
+			   struct st_texture_object *stObj,
+                           GLuint dstLevel,
+			   struct st_texture_image *stImage)
+{
+   /* debug checks */
+   {
+      const struct gl_texture_image *dstImage =
+         stObj->base.Image[stImage->face][stImage->level];
+      assert(dstImage);
+      assert(dstImage->Width == stImage->base.Width);
+      assert(dstImage->Height == stImage->base.Height);
+      assert(dstImage->Depth == stImage->base.Depth);
+   }
+
+   if (stImage->pt) {
+      /* Copy potentially with the blitter:
+       */
+      st_texture_image_copy(st->pipe,
+                            stObj->pt, dstLevel,  /* dest texture, level */
+                            stImage->pt, stImage->level, /* src texture, level */
+                            stImage->face);
+
+      pipe_resource_reference(&stImage->pt, NULL);
+   }
+   else if (stImage->base.Data) {
+      st_texture_image_data(st,
+                            stObj->pt,
+                            stImage->face,
+                            dstLevel,
+                            stImage->base.Data,
+                            stImage->base.RowStride * 
+                            util_format_get_blocksize(stObj->pt->format),
+                            stImage->base.RowStride *
+                            stImage->base.Height *
+                            util_format_get_blocksize(stObj->pt->format));
+      _mesa_align_free(stImage->base.Data);
+      stImage->base.Data = NULL;
+   }
+
+   pipe_resource_reference(&stImage->pt, stObj->pt);
+}
+
+
+/**
+ * Called during state validation.  When this function is finished,
+ * the texture object should be ready for rendering.
+ * \return GL_TRUE for success, GL_FALSE for failure (out of mem)
+ */
+GLboolean
+st_finalize_texture(struct gl_context *ctx,
+		    struct pipe_context *pipe,
+		    struct gl_texture_object *tObj)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_texture_object *stObj = st_texture_object(tObj);
+   const GLuint nr_faces = (stObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+   GLuint face;
+   struct st_texture_image *firstImage;
+   enum pipe_format firstImageFormat;
+   GLuint ptWidth, ptHeight, ptDepth, ptLayers;
+
+   if (stObj->base._Complete) {
+      /* The texture is complete and we know exactly how many mipmap levels
+       * are present/needed.  This is conditional because we may be called
+       * from the st_generate_mipmap() function when the texture object is
+       * incomplete.  In that case, we'll have set stObj->lastLevel before
+       * we get here.
+       */
+      if (stObj->base.Sampler.MinFilter == GL_LINEAR ||
+          stObj->base.Sampler.MinFilter == GL_NEAREST)
+         stObj->lastLevel = stObj->base.BaseLevel;
+      else
+         stObj->lastLevel = stObj->base._MaxLevel;
+   }
+
+   firstImage = st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]);
+   assert(firstImage);
+
+   /* If both firstImage and stObj point to a texture which can contain
+    * all active images, favour firstImage.  Note that because of the
+    * completeness requirement, we know that the image dimensions
+    * will match.
+    */
+   if (firstImage->pt &&
+       firstImage->pt != stObj->pt &&
+       (!stObj->pt || firstImage->pt->last_level >= stObj->pt->last_level)) {
+      pipe_resource_reference(&stObj->pt, firstImage->pt);
+      pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+   }
+
+   /* Find gallium format for the Mesa texture */
+   firstImageFormat = st_mesa_format_to_pipe_format(firstImage->base.TexFormat);
+
+   /* Find size of level=0 Gallium mipmap image, plus number of texture layers */
+   {
+      GLuint width, height, depth;
+      if (!guess_base_level_size(stObj->base.Target,
+                                 firstImage->base.Width2,
+                                 firstImage->base.Height2,
+                                 firstImage->base.Depth2,
+                                 stObj->base.BaseLevel,
+                                 &width, &height, &depth)) {
+         width = stObj->width0;
+         height = stObj->height0;
+         depth = stObj->depth0;
+      }
+      /* convert GL dims to Gallium dims */
+      st_gl_texture_dims_to_pipe_dims(stObj->base.Target, width, height, depth,
+                                      &ptWidth, &ptHeight, &ptDepth, &ptLayers);
+   }
+
+   /* If we already have a gallium texture, check that it matches the texture
+    * object's format, target, size, num_levels, etc.
+    */
+   if (stObj->pt) {
+      if (stObj->pt->target != gl_target_to_pipe(stObj->base.Target) ||
+          !st_sampler_compat_formats(stObj->pt->format, firstImageFormat) ||
+          stObj->pt->last_level < stObj->lastLevel ||
+          stObj->pt->width0 != ptWidth ||
+          stObj->pt->height0 != ptHeight ||
+          stObj->pt->depth0 != ptDepth ||
+          stObj->pt->array_size != ptLayers)
+      {
+         /* The gallium texture does not match the Mesa texture so delete the
+          * gallium texture now.  We'll make a new one below.
+          */
+         pipe_resource_reference(&stObj->pt, NULL);
+         pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+         st->dirty.st |= ST_NEW_FRAMEBUFFER;
+      }
+   }
+
+   /* May need to create a new gallium texture:
+    */
+   if (!stObj->pt) {
+      GLuint bindings = default_bindings(st, firstImageFormat);
+
+      stObj->pt = st_texture_create(st,
+                                    gl_target_to_pipe(stObj->base.Target),
+                                    firstImageFormat,
+                                    stObj->lastLevel,
+                                    ptWidth,
+                                    ptHeight,
+                                    ptDepth,
+                                    ptLayers,
+                                    bindings);
+
+      if (!stObj->pt) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
+         return GL_FALSE;
+      }
+   }
+
+   /* Pull in any images not in the object's texture:
+    */
+   for (face = 0; face < nr_faces; face++) {
+      GLuint level;
+      for (level = stObj->base.BaseLevel; level <= stObj->lastLevel; level++) {
+         struct st_texture_image *stImage =
+            st_texture_image(stObj->base.Image[face][level]);
+
+         /* Need to import images in main memory or held in other textures.
+          */
+         if (stImage && stObj->pt != stImage->pt) {
+            copy_image_data_to_texture(st, stObj, level, stImage);
+         }
+      }
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Returns pointer to a default/dummy texture.
+ * This is typically used when the current shader has tex/sample instructions
+ * but the user has not provided a (any) texture(s).
+ */
+struct gl_texture_object *
+st_get_default_texture(struct st_context *st)
+{
+   if (!st->default_texture) {
+      static const GLenum target = GL_TEXTURE_2D;
+      GLubyte pixels[16][16][4];
+      struct gl_texture_object *texObj;
+      struct gl_texture_image *texImg;
+      GLuint i, j;
+
+      /* The ARB_fragment_program spec says (0,0,0,1) should be returned
+       * when attempting to sample incomplete textures.
+       */
+      for (i = 0; i < 16; i++) {
+         for (j = 0; j < 16; j++) {
+            pixels[i][j][0] = 0;
+            pixels[i][j][1] = 0;
+            pixels[i][j][2] = 0;
+            pixels[i][j][3] = 255;
+         }
+      }
+
+      texObj = st->ctx->Driver.NewTextureObject(st->ctx, 0, target);
+
+      texImg = _mesa_get_tex_image(st->ctx, texObj, target, 0);
+
+      _mesa_init_teximage_fields(st->ctx, target, texImg,
+                                 16, 16, 1, 0,  /* w, h, d, border */
+                                 GL_RGBA, MESA_FORMAT_RGBA8888);
+
+      st_TexImage(st->ctx, 2, target,
+                  0, GL_RGBA,    /* level, intformat */
+                  16, 16, 1, 0,  /* w, h, d, border */
+                  GL_RGBA, GL_UNSIGNED_BYTE, pixels,
+                  &st->ctx->DefaultPacking,
+                  texObj, texImg,
+                  0, 0);
+
+      texObj->Sampler.MinFilter = GL_NEAREST;
+      texObj->Sampler.MagFilter = GL_NEAREST;
+      texObj->_Complete = GL_TRUE;
+
+      st->default_texture = texObj;
+   }
+   return st->default_texture;
+}
+
+
+void
+st_init_texture_functions(struct dd_function_table *functions)
+{
+   functions->ChooseTextureFormat = st_ChooseTextureFormat;
+   functions->TexImage1D = st_TexImage1D;
+   functions->TexImage2D = st_TexImage2D;
+   functions->TexImage3D = st_TexImage3D;
+   functions->TexSubImage1D = st_TexSubImage1D;
+   functions->TexSubImage2D = st_TexSubImage2D;
+   functions->TexSubImage3D = st_TexSubImage3D;
+   functions->CompressedTexSubImage1D = st_CompressedTexSubImage1D;
+   functions->CompressedTexSubImage2D = st_CompressedTexSubImage2D;
+   functions->CompressedTexSubImage3D = st_CompressedTexSubImage3D;
+   functions->CopyTexImage1D = st_CopyTexImage1D;
+   functions->CopyTexImage2D = st_CopyTexImage2D;
+   functions->CopyTexSubImage1D = st_CopyTexSubImage1D;
+   functions->CopyTexSubImage2D = st_CopyTexSubImage2D;
+   functions->CopyTexSubImage3D = st_CopyTexSubImage3D;
+   functions->GenerateMipmap = st_generate_mipmap;
+
+   functions->GetTexImage = st_GetTexImage;
+
+   /* compressed texture functions */
+   functions->CompressedTexImage2D = st_CompressedTexImage2D;
+   functions->GetCompressedTexImage = st_GetCompressedTexImage;
+
+   functions->NewTextureObject = st_NewTextureObject;
+   functions->NewTextureImage = st_NewTextureImage;
+   functions->DeleteTexture = st_DeleteTextureObject;
+   functions->FreeTexImageData = st_FreeTextureImageData;
+
+   functions->TextureMemCpy = do_memcpy;
+
+   /* XXX Temporary until we can query pipe's texture sizes */
+   functions->TestProxyTexImage = _mesa_test_proxy_teximage;
+}