Switch to Mesa 7.9.

media-libs/mesa/files/7.9-glisbuffer.patch

+From c552f273f559968dfd770367e25329baccbcd0c4 Mon Sep 17 00:00:00 2001
+From: Brian Paul <brianp@vmware.com>
+Date: Thu, 11 Nov 2010 21:47:30 +0000
+Subject: mesa: make glIsBuffer() return false for never bound buffers
+
+Use a dummy buffer object as we do for frame/renderbuffer objects.
+Fixes http://bugs.freedesktop.org/show_bug.cgi?id=31514
+
+Note: this is a candidate for the 7.9 branch.
+---
+diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
+index 76f8259..df44fbe 100644
+--- a/src/mesa/main/bufferobj.c
++++ b/src/mesa/main/bufferobj.c
+@@ -55,6 +55,13 @@
+ 
+ 
+ /**
++ * Used as a placeholder for buffer objects between glGenBuffers() and
++ * glBindBuffer() so that glIsBuffer() can work correctly.
++ */
++static struct gl_buffer_object DummyBufferObject;
++
++
++/**
+  * Return pointer to address of a buffer object target.
+  * \param ctx  the GL context
+  * \param target  the buffer object target to be retrieved.
+@@ -548,6 +555,9 @@ _mesa_copy_buffer_subdata(struct gl_context *ctx,
+ void
+ _mesa_init_buffer_objects( struct gl_context *ctx )
+ {
++   memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
++   DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
++
+    _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj,
+                                  ctx->Shared->NullBufferObj);
+    _mesa_reference_buffer_object(ctx, &ctx->Array.ElementArrayBufferObj,
+@@ -605,8 +615,10 @@ bind_buffer_object(struct gl_context *ctx, GLenum target, GLuint buffer)
+    else {
+       /* non-default buffer object */
+       newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
+-      if (!newBufObj) {
+-         /* if this is a new buffer object id, allocate a buffer object now */
++      if (!newBufObj || newBufObj == &DummyBufferObject) {
++         /* If this is a new buffer object id, or one which was generated but
++          * never used before, allocate a buffer object now.
++          */
+          ASSERT(ctx->Driver.NewBufferObject);
+          newBufObj = ctx->Driver.NewBufferObject(ctx, buffer, target);
+          if (!newBufObj) {
+@@ -1066,18 +1078,10 @@ _mesa_GenBuffersARB(GLsizei n, GLuint *buffer)
+ 
+    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n);
+ 
+-   /* Allocate new, empty buffer objects and return identifiers */
++   /* Insert the ID and pointer to dummy buffer object into hash table */
+    for (i = 0; i < n; i++) {
+-      struct gl_buffer_object *bufObj;
+-      GLuint name = first + i;
+-      GLenum target = 0;
+-      bufObj = ctx->Driver.NewBufferObject( ctx, name, target );
+-      if (!bufObj) {
+-         _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenBuffersARB");
+-         return;
+-      }
+-      _mesa_HashInsert(ctx->Shared->BufferObjects, first + i, bufObj);
++      _mesa_HashInsert(ctx->Shared->BufferObjects, first + i,
++                       &DummyBufferObject);
+       buffer[i] = first + i;
+    }
+ 
+@@ -1103,7 +1107,7 @@ _mesa_IsBufferARB(GLuint id)
+    bufObj = _mesa_lookup_bufferobj(ctx, id);
+    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+ 
+-   return bufObj ? GL_TRUE : GL_FALSE;
++   return bufObj && bufObj != &DummyBufferObject;
+ }
+ 
+ 
+--
+cgit v0.8.3-6-g21f6