Mesa/u_Fix-crash-in-swrast-when-setting-a-texture-for-a-pix.patch

From c588b0b65658821e6dbc6887ee07637a64d9c037 Mon Sep 17 00:00:00 2001
From: Egbert Eich <eich@freedesktop.org>
Date: Fri, 10 Jun 2011 07:59:21 +0200
Subject: [PATCH] [SWrast, BindTexImage] Fix crash in swrast when setting a texture for a pixmap.
Patch-mainline: To be upstreamed

When glXBindTexImageEXT is called and SWrast is used there will be a crash
when sPriv->swrast_loader->getImage() is called from swrastSetTexBuffer2().
Reason: no memory has been allocated for the destination thus texImage->Data
is NULL.
Call ctx->Driver.TexImage2D() to initialize this. If memory has been allocated
in a previous call free it first.

Signed-off-by: Egbert Eich <eich@freedesktop.org>
---
 src/mesa/drivers/dri/swrast/swrast.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/swrast/swrast.c b/src/mesa/drivers/dri/swrast/swrast.c
index 719b406..02a668e 100644
--- a/src/mesa/drivers/dri/swrast/swrast.c
+++ b/src/mesa/drivers/dri/swrast/swrast.c
@@ -61,6 +61,7 @@
 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 				GLint texture_format, __DRIdrawable *dPriv)
 {
+    GET_CURRENT_CONTEXT(ctx);
     struct dri_context *dri_ctx;
     int x, y, w, h;
     __DRIscreen *sPriv = dPriv->driScreenPriv;
@@ -90,6 +91,13 @@ static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
     _mesa_init_teximage_fields(&dri_ctx->Base, target, texImage,
 			       w, h, 1, 0, internalFormat, texFormat);
 
+    if (texImage->Data)
+        ctx->Driver.FreeTexImageData(ctx, texImage);
+
+    ctx->Driver.TexImage2D(ctx, target, 0, internalFormat,
+			   w, h, 0, texture_format, GL_UNSIGNED_INT_8_8_8_8,
+			   NULL, &ctx->Unpack, texObj, texImage);
+
     sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)texImage->Data,
 				   dPriv->loaderPrivate);
 
-- 
1.7.3.4