From dc73217294efcba83c46183ed2f208250217486f Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Tue, 14 Aug 2007 11:56:59 +0100
Subject: Fix a few more problems with freeing FBOs/textures during context
 destruction.

Free FBOs before textures since the later may be referenced by the former.
Need to bind the context we're destroying if there isn't a current context
so that ctx->DeleteTexture() etc can be used.
---
 src/mesa/main/context.c | 66 +++++++++++++++++++++++++++++--------------------
 src/mesa/main/texobj.c  |  5 +++-
 2 files changed, 43 insertions(+), 28 deletions(-)

(limited to 'src/mesa')

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 5fbc69693e..37a14d3004 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -647,6 +647,11 @@ static void
 delete_framebuffer_cb(GLuint id, void *data, void *userData)
 {
    struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
+   /* The fact that the framebuffer is in the hashtable means its refcount
+    * is one, but we're removing from the hashtable now.  So clear refcount.
+    */
+   /*assert(fb->RefCount == 1);*/
+   fb->RefCount = 0;
    fb->Delete(fb);
 }
 
@@ -657,6 +662,7 @@ static void
 delete_renderbuffer_cb(GLuint id, void *data, void *userData)
 {
    struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
+   rb->RefCount = 0;  /* see comment for FBOs above */
    rb->Delete(rb);
 }
 
@@ -683,23 +689,6 @@ free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
    _mesa_HashDeleteAll(ss->DisplayList, delete_displaylist_cb, ctx);
    _mesa_DeleteHashTable(ss->DisplayList);
 
-   /*
-    * Free texture objects
-    */
-   ASSERT(ctx->Driver.DeleteTexture);
-   /* the default textures */
-   ctx->Driver.DeleteTexture(ctx, ss->Default1D);
-   ctx->Driver.DeleteTexture(ctx, ss->Default2D);
-   ctx->Driver.DeleteTexture(ctx, ss->Default3D);
-   ctx->Driver.DeleteTexture(ctx, ss->DefaultCubeMap);
-   ctx->Driver.DeleteTexture(ctx, ss->DefaultRect);
-   ctx->Driver.DeleteTexture(ctx, ss->Default1DArray);
-   ctx->Driver.DeleteTexture(ctx, ss->Default2DArray);
-
-   /* all other textures */
-   _mesa_HashDeleteAll(ss->TexObjects, delete_texture_cb, ctx);
-   _mesa_DeleteHashTable(ss->TexObjects);
-
 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_NV_fragment_program)
    _mesa_HashDeleteAll(ss->Programs, delete_program_cb, ctx);
    _mesa_DeleteHashTable(ss->Programs);
@@ -737,6 +726,23 @@ free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
    _mesa_DeleteHashTable(ss->RenderBuffers);
 #endif
 
+   /*
+    * Free texture objects (after FBOs since some textures might have
+    * been bound to FBOs).
+    */
+   ASSERT(ctx->Driver.DeleteTexture);
+   /* the default textures */
+   ctx->Driver.DeleteTexture(ctx, ss->Default1D);
+   ctx->Driver.DeleteTexture(ctx, ss->Default2D);
+   ctx->Driver.DeleteTexture(ctx, ss->Default3D);
+   ctx->Driver.DeleteTexture(ctx, ss->DefaultCubeMap);
+   ctx->Driver.DeleteTexture(ctx, ss->DefaultRect);
+   ctx->Driver.DeleteTexture(ctx, ss->Default1DArray);
+   ctx->Driver.DeleteTexture(ctx, ss->Default2DArray);
+   /* all other textures */
+   _mesa_HashDeleteAll(ss->TexObjects, delete_texture_cb, ctx);
+   _mesa_DeleteHashTable(ss->TexObjects);
+
    _glthread_DESTROY_MUTEX(ss->Mutex);
 
    _mesa_free(ss);
@@ -1190,18 +1196,19 @@ _mesa_create_context(const GLvisual *visual,
 void
 _mesa_free_context_data( GLcontext *ctx )
 {
-   /* if we're destroying the current context, unbind it first */
-   if (ctx == _mesa_get_current_context()) {
-      _mesa_make_current(NULL, NULL, NULL);
-   }
-   else {
-      /* unreference WinSysDraw/Read buffers */
-      _mesa_unreference_framebuffer(&ctx->WinSysDrawBuffer);
-      _mesa_unreference_framebuffer(&ctx->WinSysReadBuffer);
-      _mesa_unreference_framebuffer(&ctx->DrawBuffer);
-      _mesa_unreference_framebuffer(&ctx->ReadBuffer);
+   if (!_mesa_get_current_context()){
+      /* No current context, but we may need one in order to delete
+       * texture objs, etc.  So temporarily bind the context now.
+       */
+      _mesa_make_current(ctx, NULL, NULL);
    }
 
+   /* unreference WinSysDraw/Read buffers */
+   _mesa_unreference_framebuffer(&ctx->WinSysDrawBuffer);
+   _mesa_unreference_framebuffer(&ctx->WinSysReadBuffer);
+   _mesa_unreference_framebuffer(&ctx->DrawBuffer);
+   _mesa_unreference_framebuffer(&ctx->ReadBuffer);
+
    _mesa_free_lighting_data( ctx );
    _mesa_free_eval_data( ctx );
    _mesa_free_texture_data( ctx );
@@ -1233,6 +1240,11 @@ _mesa_free_context_data( GLcontext *ctx )
 
    if (ctx->Extensions.String)
       _mesa_free((void *) ctx->Extensions.String);
+
+   /* unbind the context if it's currently bound */
+   if (ctx == _mesa_get_current_context()) {
+      _mesa_make_current(NULL, NULL, NULL);
+   }
 }
 
 
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index ac70e5a22e..ea3328a047 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -287,7 +287,10 @@ _mesa_reference_texobj(struct gl_texture_object **ptr,
 
       if (deleteFlag) {
          GET_CURRENT_CONTEXT(ctx);
-         ctx->Driver.DeleteTexture(ctx, oldTex);
+         if (ctx)
+            ctx->Driver.DeleteTexture(ctx, oldTex);
+         else
+            _mesa_problem(NULL, "Unable to delete texture, no context");
       }
 
       *ptr = NULL;
-- 
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