Mesa (master): meta: Fix GL_RENDERBUFFER binding in decompress_texture_image().

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 7fde071f04afff86d4f8d7895073e22e60970b4e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7fde071f04afff86d4f8d7895073e22e60970b4e

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Jun  4 11:40:23 2012 -0700

meta: Fix GL_RENDERBUFFER binding in decompress_texture_image().

This isn't saved/restored by _mesa_meta_begin, so we need to do it
manually (like we do for the read/draw framebuffers).  Additionally,
we neglected to re-bind before the glRenderbufferStorage call.

+13 oglconforms.

NOTE: This is a candidate for stable release branches.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/drivers/common/meta.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index a20e419..7978b08 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -3269,6 +3269,7 @@ decompress_texture_image(struct gl_context *ctx,
    };
    struct vertex verts[4];
    GLuint fboDrawSave, fboReadSave;
+   GLuint rbSave;
 
    if (slice > 0) {
       assert(target == GL_TEXTURE_3D ||
@@ -3285,6 +3286,7 @@ decompress_texture_image(struct gl_context *ctx,
    /* save fbo bindings (not saved by _mesa_meta_begin()) */
    fboDrawSave = ctx->DrawBuffer->Name;
    fboReadSave = ctx->ReadBuffer->Name;
+   rbSave = ctx->CurrentRenderbuffer ? ctx->CurrentRenderbuffer->Name : 0;
 
    _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_PIXEL_STORE);
 
@@ -3305,6 +3307,7 @@ decompress_texture_image(struct gl_context *ctx,
 
    /* alloc dest surface */
    if (width > decompress->Width || height > decompress->Height) {
+      _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO);
       _mesa_RenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA,
                                    width, height);
       decompress->Width = width;
@@ -3437,6 +3440,7 @@ decompress_texture_image(struct gl_context *ctx,
       _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fboDrawSave);
       _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fboReadSave);
    }
+   _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, rbSave);
 }