3 files changed, 35 insertions, 14 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_blit.c b/mesalib/src/gallium/auxiliary/util/u_blit.c
index a10fd17cb..127973388 100644
--- a/mesalib/src/gallium/auxiliary/util/u_blit.c
+++ b/mesalib/src/gallium/auxiliary/util/u_blit.c
@@ -321,6 +321,26 @@ regions_overlap(int srcX0, int srcY0,
 
 
 /**
+ * Can we blit from src format to dest format with a simple copy?
+ */
+static boolean
+formats_compatible(enum pipe_format src_format,
+                   enum pipe_format dst_format)
+{
+   if (src_format == dst_format) {
+      return TRUE;
+   }
+   else {
+      const struct util_format_description *src_desc =
+         util_format_description(src_format);
+      const struct util_format_description *dst_desc =
+         util_format_description(dst_format);
+      return util_is_format_compatible(src_desc, dst_desc);
+   }
+}
+
+
+/**
  * Copy pixel block from src surface to dst surface.
  * Overlapping regions are acceptable.
  * Flipping and stretching are supported.
@@ -377,7 +397,7 @@ util_blit_pixels_writemask(struct blit_state *ctx,
     * no overlapping.
     * Filter mode should not matter since there's no stretching.
     */
-   if (dst_format == src_format &&
+   if (formats_compatible(src_format, dst_format) &&
        srcX0 < srcX1 &&
        dstX0 < dstX1 &&
        srcY0 < srcY1 &&
diff --git a/mesalib/src/gallium/auxiliary/util/u_blitter.c b/mesalib/src/gallium/auxiliary/util/u_blitter.c
index 48808ae08..5784a7ceb 100644
--- a/mesalib/src/gallium/auxiliary/util/u_blitter.c
+++ b/mesalib/src/gallium/auxiliary/util/u_blitter.c
@@ -351,12 +351,12 @@ static void blitter_unset_running_flag(struct blitter_context_priv *ctx)
 
 static void blitter_check_saved_vertex_states(struct blitter_context_priv *ctx)
 {
-   assert(ctx->base.saved_num_vertex_buffers != ~0 &&
-          ctx->base.saved_velem_state != INVALID_PTR &&
-          ctx->base.saved_vs != INVALID_PTR &&
-          (!ctx->has_geometry_shader || ctx->base.saved_gs != INVALID_PTR) &&
-          (!ctx->has_stream_out || ctx->base.saved_num_so_targets != ~0) &&
-          ctx->base.saved_rs_state != INVALID_PTR);
+   assert(ctx->base.saved_num_vertex_buffers != ~0);
+   assert(ctx->base.saved_velem_state != INVALID_PTR);
+   assert(ctx->base.saved_vs != INVALID_PTR);
+   assert(!ctx->has_geometry_shader || ctx->base.saved_gs != INVALID_PTR);
+   assert(!ctx->has_stream_out || ctx->base.saved_num_so_targets != ~0);
+   assert(ctx->base.saved_rs_state != INVALID_PTR);
 }
 
 static void blitter_restore_vertex_states(struct blitter_context_priv *ctx)
@@ -410,9 +410,9 @@ static void blitter_restore_vertex_states(struct blitter_context_priv *ctx)
 
 static void blitter_check_saved_fragment_states(struct blitter_context_priv *ctx)
 {
-   assert(ctx->base.saved_fs != INVALID_PTR &&
-          ctx->base.saved_dsa_state != INVALID_PTR &&
-          ctx->base.saved_blend_state != INVALID_PTR);
+   assert(ctx->base.saved_fs != INVALID_PTR);
+   assert(ctx->base.saved_dsa_state != INVALID_PTR);
+   assert(ctx->base.saved_blend_state != INVALID_PTR);
 }
 
 static void blitter_restore_fragment_states(struct blitter_context_priv *ctx)
@@ -453,8 +453,8 @@ static void blitter_restore_fb_state(struct blitter_context_priv *ctx)
 
 static void blitter_check_saved_textures(struct blitter_context_priv *ctx)
 {
-   assert(ctx->base.saved_num_sampler_states != ~0 &&
-          ctx->base.saved_num_sampler_views != ~0);
+   assert(ctx->base.saved_num_sampler_states != ~0);
+   assert(ctx->base.saved_num_sampler_views != ~0);
 }
 
 static void blitter_restore_textures(struct blitter_context_priv *ctx)
diff --git a/mesalib/src/gallium/auxiliary/util/u_format.h b/mesalib/src/gallium/auxiliary/util/u_format.h
index 874ea7eb1..b9ae7c190 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.h
+++ b/mesalib/src/gallium/auxiliary/util/u_format.h
@@ -578,8 +578,9 @@ boolean
 util_format_is_pure_uint(enum pipe_format format);
 
 /**
- * Whether the src format can be blitted to destation format with a simple
- * memcpy.
+ * Check if the src format can be blitted to the destination format with
+ * a simple memcpy.  For example, blitting from RGBA to RGBx is OK, but not
+ * the reverse.
  */
 boolean
 util_is_format_compatible(const struct util_format_description *src_desc,