From: Marek Olšák <maraeo@gmail.com>
Date: Sat, 28 May 2011 12:28:19 +0000 (+0200)
Subject: st/mesa: fix changing internal format via RenderbufferStorage
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=49d4e803d369e0faedfa44063fb7f6232faa8175;p=mesa.git

st/mesa: fix changing internal format via RenderbufferStorage

The problem is: The second time the function is called with a new
internal format, strb->format is usually not PIPE_FORMAT_NONE.

RenderbufferStorage(... GL_RGBA8 ...);
RenderbufferStorage(... GL_RGBA16 ...); // had no effect on the format

Broken with: fd6f2d6e5783d8810d0ab88e1c470958fd5eb2eb
Test: piglit/fbo-storage-completeness

NOTE: This is a candidate for the 7.10 branch.
(if fd6f2d6e5783d8810d0ab88e1c470958fd5eb2eb is cherry-picked as well)

Reviewed-by: Brian Paul <brianp@vmware.com>
---

diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 755b6bcf967..64424f77634 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -74,11 +74,8 @@ st_renderbuffer_alloc_storage(struct gl_context * ctx,
    enum pipe_format format;
    struct pipe_surface surf_tmpl;
 
-   if (strb->format != PIPE_FORMAT_NONE)
-      format = strb->format;
-   else
-      format = st_choose_renderbuffer_format(screen, internalFormat,
-                                             rb->NumSamples);
+   format = st_choose_renderbuffer_format(screen, internalFormat,
+                                          rb->NumSamples);
 
    if (format == PIPE_FORMAT_NONE) {
       return FALSE;