r300-gallium: Allow surface_fill to clear depth/stencil buffers too.

src/gallium/drivers/r300/r300_state_inlines.h

@@ -292,6 +292,7 @@ static INLINE uint32_t r300_translate_colorformat(enum pipe_format format)
             return R300_COLOR_FORMAT_ARGB4444;
         /* 32-bit buffers */
         case PIPE_FORMAT_A8R8G8B8_UNORM:
+        case PIPE_FORMAT_Z24S8_UNORM:
             return R300_COLOR_FORMAT_ARGB8888;
         /* XXX Not in pipe_format
         case PIPE_FORMAT_A32R32G32B32:
@@ -337,6 +338,7 @@ static INLINE uint32_t r300_translate_out_fmt(enum pipe_format format)
 {
     switch (format) {
         case PIPE_FORMAT_A8R8G8B8_UNORM:
+        case PIPE_FORMAT_Z24S8_UNORM:
             return R300_US_OUT_FMT_C4_8 |
                 R300_C0_SEL_B | R300_C1_SEL_G |
                 R300_C2_SEL_R | R300_C3_SEL_A;

src/gallium/drivers/r300/r300_surface.c

@@ -97,7 +97,7 @@ static void r300_surface_fill(struct pipe_context* pipe,
         dest, x, y, w, h, pixpitch, color);
 
     /* Fallback? */
-    if (tex->tex.format != PIPE_FORMAT_A8R8G8B8_UNORM) {
+    if (FALSE) {
         debug_printf("r300: Falling back on surface clear...");
         util_surface_fill(pipe, dest, x, y, w, h, color);
         return;