4 files changed, 14 insertions, 6 deletions
diff --git a/src/mesa/drivers/dri/i810/i810tris.c b/src/mesa/drivers/dri/i810/i810tris.c
index b508496fb69..213ba541cee 100644
--- a/src/mesa/drivers/dri/i810/i810tris.c
+++ b/src/mesa/drivers/dri/i810/i810tris.c
@@ -270,7 +270,8 @@ do {							\
 
 #define LOCAL_VARS(n)							\
    i810ContextPtr imesa = I810_CONTEXT(ctx);				\
-   GLuint color[n], spec[n];						\
+   GLuint color[n] = { 0 };						\
+   GLuint spec[n] = { 0 };						\
    GLuint coloroffset = (imesa->vertex_size == 4 ? 3 : 4);		\
    GLboolean havespec = (imesa->vertex_size > 4);			\
    (void) color; (void) spec; (void) coloroffset; (void) havespec;
diff --git a/src/mesa/drivers/dri/intel/intel_buffers.c b/src/mesa/drivers/dri/intel/intel_buffers.c
index 6b12d484d85..05643189a21 100644
--- a/src/mesa/drivers/dri/intel/intel_buffers.c
+++ b/src/mesa/drivers/dri/intel/intel_buffers.c
@@ -191,10 +191,15 @@ intel_draw_buffer(GLcontext * ctx, struct gl_framebuffer *fb)
       return;
    }
 
-   /*
-    * How many color buffers are we drawing into?
+   /* How many color buffers are we drawing into?
+    *
+    * If there are zero buffers or the buffer is too big, don't configure any
+    * regions for hardware drawing.  We'll fallback to software below.  Not
+    * having regions set makes some of the software fallback paths faster.
     */
-   if (fb->_NumColorDrawBuffers == 0) {
+   if ((fb->Width > ctx->Const.MaxRenderbufferSize)
+       || (fb->Height > ctx->Const.MaxRenderbufferSize)
+       || (fb->_NumColorDrawBuffers == 0)) {
       /* writing to 0  */
       colorRegions[0] = NULL;
       intel->constant_cliprect = GL_TRUE;
diff --git a/src/mesa/drivers/dri/mach64/mach64_tris.c b/src/mesa/drivers/dri/mach64/mach64_tris.c
index f2e8e2e3ae8..c2a0adfef02 100644
--- a/src/mesa/drivers/dri/mach64/mach64_tris.c
+++ b/src/mesa/drivers/dri/mach64/mach64_tris.c
@@ -1297,7 +1297,8 @@ do {						\
 
 #define LOCAL_VARS(n)						\
    mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);		\
-   GLuint color[n], spec[n];					\
+   GLuint color[n] = { 0 };					\
+   GLuint spec[n] = { 0 };					\
    GLuint vertex_size = mmesa->vertex_size;			\
    const GLuint xyoffset = 9;					\
    const GLuint coloroffset = 8;				\
diff --git a/src/mesa/drivers/dri/mga/mgatris.c b/src/mesa/drivers/dri/mga/mgatris.c
index b93a21c3acf..c1bcd4b8531 100644
--- a/src/mesa/drivers/dri/mga/mgatris.c
+++ b/src/mesa/drivers/dri/mga/mgatris.c
@@ -397,7 +397,8 @@ do {						\
 
 #define LOCAL_VARS(n)					\
    mgaContextPtr mmesa = MGA_CONTEXT(ctx);		\
-   GLuint color[n], spec[n];				\
+   GLuint color[n] = { 0 };				\
+   GLuint spec[n] = { 0 };				\
    (void) color; (void) spec;