From 293ad985103ceab90c126236af2f75617fce6b2b Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Mon, 27 Sep 2004 16:19:17 +0000
Subject: [PATCH] VBO RefCount fix (David Reveman)

---
 src/mesa/main/bufferobj.c | 9 +++++++++
 src/mesa/main/varray.c    | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 84af8158ad2..0d0e5f4bcfd 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -539,41 +539,50 @@ _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids)
             if (ctx->Array.Vertex.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.Vertex.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.Normal.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.Normal.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.Color.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.Color.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.SecondaryColor.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.SecondaryColor.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.FogCoord.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.FogCoord.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.Index.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.Index.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             if (ctx->Array.EdgeFlag.BufferObj == bufObj) {
                bufObj->RefCount--;
                ctx->Array.EdgeFlag.BufferObj = ctx->Array.NullBufferObj;
+               ctx->Array.NullBufferObj->RefCount++;
             }
             for (j = 0; j < MAX_TEXTURE_UNITS; j++) {
                if (ctx->Array.TexCoord[j].BufferObj == bufObj) {
                   bufObj->RefCount--;
                   ctx->Array.TexCoord[j].BufferObj = ctx->Array.NullBufferObj;
+                  ctx->Array.NullBufferObj->RefCount++;
                }
             }
             for (j = 0; j < VERT_ATTRIB_MAX; j++) {
                if (ctx->Array.VertexAttrib[j].BufferObj == bufObj) {
                   bufObj->RefCount--;
                   ctx->Array.VertexAttrib[j].BufferObj = ctx->Array.NullBufferObj;
+                  ctx->Array.NullBufferObj->RefCount++;
                }
             }
 
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index 04d0a07e286..404302873b3 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -60,6 +60,7 @@ update_array(GLcontext *ctx, struct gl_client_array *array,
 #if FEATURE_ARB_vertex_buffer_object
    array->BufferObj->RefCount--;
    if (array->BufferObj->RefCount <= 0) {
+      ASSERT(array->BufferObj->Name);
       _mesa_remove_buffer_object( ctx, array->BufferObj );
       (*ctx->Driver.DeleteBuffer)( ctx, array->BufferObj );
    }
-- 
2.30.2