Mesa (master): r300g: Fix EXT_packed_depth_stencil functionality.

[Corbin Simpson]

Module: Mesa
Branch: master
Commit: f150e05afcbce73ff8422ffef2ce02536f691f2c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f150e05afcbce73ff8422ffef2ce02536f691f2c

Author: Corbin Simpson <MostAwesomeDude at gmail.com>
Date:   Sat Jun 27 10:57:03 2009 -0700

r300g: Fix EXT_packed_depth_stencil functionality.

Allow Z24S8 to be a true texture.

---

 src/gallium/drivers/r300/r300_screen.c  |    8 ++++++--
 src/gallium/drivers/r300/r300_texture.h |    4 ++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 6817d71..42a7009 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -214,10 +214,14 @@ static boolean check_tex_2d_format(enum pipe_format format, uint32_t usage,
 
         /* Z buffer */
         case PIPE_FORMAT_Z16_UNORM:
-        /* Z buffer with stencil */
-        case PIPE_FORMAT_Z24S8_UNORM:
             return usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 
+        /* Z buffer with stencil or texture */
+        case PIPE_FORMAT_Z24S8_UNORM:
+            return usage &
+                (PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
+                 PIPE_TEXTURE_USAGE_SAMPLER);
+
         /* Definitely unsupported formats. */
         /* Non-usable Z buffer/stencil formats. */
         case PIPE_FORMAT_Z24X8_UNORM:
diff --git a/src/gallium/drivers/r300/r300_texture.h b/src/gallium/drivers/r300/r300_texture.h
index 28157de..5511cca 100644
--- a/src/gallium/drivers/r300/r300_texture.h
+++ b/src/gallium/drivers/r300/r300_texture.h
@@ -55,10 +55,14 @@ static INLINE uint32_t r300_translate_texformat(enum pipe_format format)
         /* DXT5 */
         case PIPE_FORMAT_DXT5_RGBA:
             return R300_EASY_TX_FORMAT(Y, Z, W, X, DXT5);
+        /* W24_FP */
+        case PIPE_FORMAT_Z24S8_UNORM:
+            return R300_EASY_TX_FORMAT(X, X, X, X, W24_FP);
         default:
             debug_printf("r300: Implementation error: "
                 "Got unsupported texture format %s in %s\n",
                 pf_name(format), __FUNCTION__);
+            assert(0);
             break;
     }
     return 0;