3 files changed, 32 insertions, 1 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_clear.h b/mesalib/src/gallium/auxiliary/util/u_clear.h
index 75047c16b..bd8efdb4a 100644
--- a/mesalib/src/gallium/auxiliary/util/u_clear.h
+++ b/mesalib/src/gallium/auxiliary/util/u_clear.h
@@ -47,7 +47,10 @@ util_clear(struct pipe_context *pipe,
    for (i = 0; i < framebuffer->nr_cbufs; i++) {
       if (buffers & (PIPE_CLEAR_COLOR0 << i)) {
          struct pipe_surface *ps = framebuffer->cbufs[i];
-         pipe->clear_render_target(pipe, ps, color, 0, 0, ps->width, ps->height);
+
+         if (ps) {
+            pipe->clear_render_target(pipe, ps, color, 0, 0, ps->width, ps->height);
+         }
       }
    }
 
diff --git a/mesalib/src/gallium/auxiliary/util/u_framebuffer.c b/mesalib/src/gallium/auxiliary/util/u_framebuffer.c
index 683967237..2e0ef749e 100644
--- a/mesalib/src/gallium/auxiliary/util/u_framebuffer.c
+++ b/mesalib/src/gallium/auxiliary/util/u_framebuffer.c
@@ -127,6 +127,9 @@ util_framebuffer_min_size(const struct pipe_framebuffer_state *fb,
    unsigned i;
 
    for (i = 0; i < fb->nr_cbufs; i++) {
+      if (!fb->cbufs[i])
+         continue;
+
       w = MIN2(w, fb->cbufs[i]->width);
       h = MIN2(h, fb->cbufs[i]->height);
    }
@@ -171,3 +174,24 @@ util_framebuffer_get_num_layers(const struct pipe_framebuffer_state *fb)
 	}
 	return num_layers;
 }
+
+
+/**
+ * Return the number of MSAA samples.
+ */
+unsigned
+util_framebuffer_get_num_samples(const struct pipe_framebuffer_state *fb)
+{
+   unsigned i;
+
+   for (i = 0; i < fb->nr_cbufs; i++) {
+      if (fb->cbufs[i]) {
+         return MAX2(1, fb->cbufs[i]->texture->nr_samples);
+      }
+   }
+   if (fb->zsbuf) {
+      return MAX2(1, fb->zsbuf->texture->nr_samples);
+   }
+
+   return 1;
+}
diff --git a/mesalib/src/gallium/auxiliary/util/u_framebuffer.h b/mesalib/src/gallium/auxiliary/util/u_framebuffer.h
index 0e6c98363..c73942c9c 100644
--- a/mesalib/src/gallium/auxiliary/util/u_framebuffer.h
+++ b/mesalib/src/gallium/auxiliary/util/u_framebuffer.h
@@ -60,6 +60,10 @@ extern unsigned
 util_framebuffer_get_num_layers(const struct pipe_framebuffer_state *fb);
 
 
+extern unsigned
+util_framebuffer_get_num_samples(const struct pipe_framebuffer_state *fb);
+
+
 #ifdef __cplusplus
 }
 #endif