intel: Add a vtbl hook for determining if a format is renderable.

By relying on just intel_span_supports_format, some formats that
aren't supported pre-gen4 were not reporting FBO incomplete.  And we
also complained in stderr when it happened on i915 because draw_region
gets called before framebuffer completeness validation.

1 files changed, 16 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 1769991306..4570af66cd 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -42,7 +42,7 @@
 #include "brw_context.h"
 #include "brw_state.h"
 #include "brw_defines.h"
-
+#include "brw_wm.h"
 
 static GLuint translate_tex_target( GLenum target )
 {
@@ -103,6 +103,21 @@ static uint32_t brw_format_for_mesa_format[MESA_FORMAT_COUNT] =
    [MESA_FORMAT_SIGNED_RGBA8888_REV] = BRW_SURFACEFORMAT_R8G8B8A8_SNORM,
 };
 
+bool
+brw_render_target_supported(gl_format format)
+{
+   if (format == MESA_FORMAT_S8_Z24 ||
+       format == MESA_FORMAT_X8_Z24 ||
+       format == MESA_FORMAT_Z16) {
+      return true;
+   }
+
+   /* Not exactly true, as some of those formats are not renderable.
+    * But at least we know how to translate them.
+    */
+   return brw_format_for_mesa_format[format] != 0;
+}
+
 static GLuint translate_tex_format( gl_format mesa_format,
                                     GLenum internal_format,
 				    GLenum depth_mode )