Mesa (master): st/mesa: fix BlitFramebuffer for D24S8 textures

[Brian Paul]

Module: Mesa
Branch: master
Commit: 36e523f4a3383bc9e6170d0bc959ba9ffdb85016
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=36e523f4a3383bc9e6170d0bc959ba9ffdb85016

Author: Marek Olšák <maraeo at gmail.com>
Date:   Sat Aug 14 08:47:32 2010 -0700

st/mesa: fix BlitFramebuffer for D24S8 textures

This is the same issue as in the previous patch, but here the Blit is not
implemented for separate depth and stencil buffers at all (such
a configuration is not supported in Gallium) and the code incorrectly treated
a D24S8 texture as two separate buffers, making this Blit a no-op.

Signed-off-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/state_tracker/st_cb_blit.c |   38 +++++++++++++++-------------------
 1 files changed, 17 insertions(+), 21 deletions(-)

diff --git a/src/mesa/state_tracker/st_cb_blit.c b/src/mesa/state_tracker/st_cb_blit.c
index 1f73f50..b3c7544 100644
--- a/src/mesa/state_tracker/st_cb_blit.c
+++ b/src/mesa/state_tracker/st_cb_blit.c
@@ -40,6 +40,7 @@
 #include "st_cb_fbo.h"
 
 #include "util/u_blit.h"
+#include "util/u_inlines.h"
 
 
 void
@@ -152,38 +153,33 @@ st_BlitFramebuffer(GLcontext *ctx,
       /* depth and/or stencil blit */
 
       /* get src/dst depth surfaces */
-      struct st_renderbuffer *srcDepthRb = 
+      struct gl_renderbuffer_attachment *srcDepth =
+         &readFB->Attachment[BUFFER_DEPTH];
+      struct gl_renderbuffer_attachment *dstDepth =
+         &drawFB->Attachment[BUFFER_DEPTH];
+      struct gl_renderbuffer_attachment *srcStencil =
+         &readFB->Attachment[BUFFER_STENCIL];
+      struct gl_renderbuffer_attachment *dstStencil =
+         &drawFB->Attachment[BUFFER_STENCIL];
+
+      struct st_renderbuffer *srcDepthRb =
          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
       struct st_renderbuffer *dstDepthRb = 
          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
-      struct pipe_surface *srcDepthSurf =
-         srcDepthRb ? srcDepthRb->surface : NULL;
       struct pipe_surface *dstDepthSurf =
          dstDepthRb ? dstDepthRb->surface : NULL;
 
-      /* get src/dst stencil surfaces */
-      struct st_renderbuffer *srcStencilRb = 
-         st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
-      struct st_renderbuffer *dstStencilRb = 
-         st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
-      struct pipe_surface *srcStencilSurf =
-         srcStencilRb ? srcStencilRb->surface : NULL;
-      struct pipe_surface *dstStencilSurf =
-         dstStencilRb ? dstStencilRb->surface : NULL;
-
       if ((mask & depthStencil) == depthStencil &&
-          srcDepthSurf == srcStencilSurf &&
-          dstDepthSurf == dstStencilSurf) {
-         struct pipe_subresource srcSub;
-
-         srcSub.face = srcDepthRb->surface->face;
-         srcSub.level = srcDepthRb->surface->level;
+          st_is_depth_stencil_combined(srcDepth, srcStencil) &&
+          st_is_depth_stencil_combined(dstDepth, dstStencil)) {
 
          /* Blitting depth and stencil values between combined
           * depth/stencil buffers.  This is the ideal case for such buffers.
           */
-         util_blit_pixels(st->blit,
-                          srcDepthRb->texture, srcSub, srcX0, srcY0, srcX1, srcY1,
+         util_blit_pixels(st->blit, srcDepthRb->texture,
+                          u_subresource(srcDepthRb->surface->face,
+                                        srcDepthRb->surface->level),
+                          srcX0, srcY0, srcX1, srcY1,
                           srcDepthRb->surface->zslice,
                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
                           0.0, pFilter);