From: Erik Wien <wien@start.no>
Date: Tue, 26 Jan 2010 20:19:30 +0000 (-0700)
Subject: mesa: Don't bind DRAW/READ_FRAMEBUFFER separately without FBO blit support
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=68ca19afd7299fa9c686f95d53b7e14df37aba4c

mesa: Don't bind DRAW/READ_FRAMEBUFFER separately without FBO blit support

If GL_EXT_framebuffer_blit was not supported _mesa_DeleteFramebuffersEXT
would raise an error when deleting the currently bound framebuffer. This
because it tried to bind the default DRAW- and READ_FRAMEBUFFER separately.
This patch binds the default FRAMEBUFFER instead in that case.

Encountered in the fbo/fbo-copyteximage piglit test on R600.

Patch cleaned up a bit by Brian Paul.
---

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 56e806559fd..0e83a4e87fa 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -1350,15 +1350,26 @@ _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
 
             /* check if deleting currently bound framebuffer object */
-            if (fb == ctx->DrawBuffer) {
-               /* bind default */
-               ASSERT(fb->RefCount >= 2);
-               _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
+            if (ctx->Extensions.EXT_framebuffer_blit) {
+               /* separate draw/read binding points */
+               if (fb == ctx->DrawBuffer) {
+                  /* bind default */
+                  ASSERT(fb->RefCount >= 2);
+                  _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
+               }
+               if (fb == ctx->ReadBuffer) {
+                  /* bind default */
+                  ASSERT(fb->RefCount >= 2);
+                  _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
+               }
             }
-            if (fb == ctx->ReadBuffer) {
-               /* bind default */
-               ASSERT(fb->RefCount >= 2);
-               _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
+            else {
+               /* only one binding point for read/draw buffers */
+               if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
+                  /* bind default */
+                  ASSERT(fb->RefCount >= 2);
+                  _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+               }    
             }
 
 	    /* remove from hash table immediately, to free the ID */