[Mesa-dev] [PATCH] st/mesa: prefer formats without stencil for DEPTH_COMPONENT

[Marek Olšák]

for fast Z clears to be used more often
---
 src/mesa/state_tracker/st_format.c |   22 ++++++++++++++--------
 1 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/src/mesa/state_tracker/st_format.c 
b/src/mesa/state_tracker/st_format.c
index b136210..d42bcb4 100644
--- a/src/mesa/state_tracker/st_format.c
+++ b/src/mesa/state_tracker/st_format.c
@@ -870,12 +870,16 @@ st_choose_format(struct pipe_screen *screen, GLenum 
internalFormat,
          return PIPE_FORMAT_Z16_UNORM;
       /* fall-through */
    case GL_DEPTH_COMPONENT24:
-      if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
-                                      target, sample_count, bindings))
-         return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
-      if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
-                                      target, sample_count, bindings))
-         return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
+      {
+         static const enum pipe_format formats[] = {
+            PIPE_FORMAT_Z24X8_UNORM,
+            PIPE_FORMAT_X8Z24_UNORM,
+            PIPE_FORMAT_Z24_UNORM_S8_USCALED,
+            PIPE_FORMAT_S8_USCALED_Z24_UNORM,
+         };
+         return find_supported_format(screen, formats, Elements(formats),
+                                      target, sample_count, bindings);
+      }
       /* fall-through */
    case GL_DEPTH_COMPONENT32:
       if (screen->is_format_supported(screen, PIPE_FORMAT_Z32_UNORM, target,
@@ -885,10 +889,12 @@ st_choose_format(struct pipe_screen *screen, GLenum 
internalFormat,
    case GL_DEPTH_COMPONENT:
       {
          static const enum pipe_format formats[] = {
+            PIPE_FORMAT_Z24X8_UNORM,
+            PIPE_FORMAT_X8Z24_UNORM,
             PIPE_FORMAT_Z32_UNORM,
+            PIPE_FORMAT_Z16_UNORM,
             PIPE_FORMAT_Z24_UNORM_S8_USCALED,
-            PIPE_FORMAT_S8_USCALED_Z24_UNORM,
-            PIPE_FORMAT_Z16_UNORM
+            PIPE_FORMAT_S8_USCALED_Z24_UNORM
          };
          return find_supported_format(screen, formats, Elements(formats),
                                       target, sample_count, bindings);
-- 
1.7.4.1

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