From: Brian Paul <brianp@vmware.com>
Date: Fri, 21 Sep 2012 14:09:01 +0000 (-0600)
Subject: st/mesa: check for zero-size image in st_TestProxyTexImage()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f1c448d2e59bd14b4ddb63654e7b6d605f877d10;p=mesa.git

st/mesa: check for zero-size image in st_TestProxyTexImage()

Fixes divide by zero issue in llvmpipe driver.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
---

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 4f4fe77dad3..5634a3e6e54 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -1379,6 +1379,11 @@ st_TestProxyTexImage(struct gl_context *ctx, GLenum target,
    struct st_context *st = st_context(ctx);
    struct pipe_context *pipe = st->pipe;
 
+   if (width == 0 || height == 0 || depth == 0) {
+      /* zero-sized images are legal, and always fit! */
+      return GL_TRUE;
+   }
+
    if (pipe->screen->can_create_resource) {
       /* Ask the gallium driver if the texture is too large */
       struct gl_texture_object *texObj =