i965: srgb texture fixes

i965 can either do SRGBA8_REV format or SARGB8 format, but not SRGBA8.
Could add SRGBA8_REV support to mesa, but simply use SARGB8 for now.
While here, also add true srgb luminance / luminance_alpha support -
unfortunately the published docs fail to mention which asics support
this, tested on g43 so assume this works on any g4x.

1 files changed, 14 insertions, 5 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_tex_format.c b/src/mesa/drivers/dri/intel/intel_tex_format.c
index ce33cdc..3322a71 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_format.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_format.c
@@ -1,5 +1,6 @@
 #include "intel_context.h"
 #include "intel_tex.h"
+#include "intel_chipset.h"
 #include "main/texformat.h"
 #include "main/enums.h"
 
@@ -160,15 +161,23 @@ intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
    case GL_SRGB8_EXT:
    case GL_SRGB_ALPHA_EXT:
    case GL_SRGB8_ALPHA8_EXT:
-   case GL_SLUMINANCE_EXT:
-   case GL_SLUMINANCE8_EXT:
-   case GL_SLUMINANCE_ALPHA_EXT:
-   case GL_SLUMINANCE8_ALPHA8_EXT:
    case GL_COMPRESSED_SRGB_EXT:
    case GL_COMPRESSED_SRGB_ALPHA_EXT:
    case GL_COMPRESSED_SLUMINANCE_EXT:
    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
-       return &_mesa_texformat_srgba8;
+      return &_mesa_texformat_sargb8;
+   case GL_SLUMINANCE_EXT:
+   case GL_SLUMINANCE8_EXT:
+      if (IS_G4X(intel->intelScreen->deviceID))
+         return &_mesa_texformat_sl8;
+      else
+         return &_mesa_texformat_sargb8;
+   case GL_SLUMINANCE_ALPHA_EXT:
+   case GL_SLUMINANCE8_ALPHA8_EXT:
+      if (IS_G4X(intel->intelScreen->deviceID))
+         return &_mesa_texformat_sla8;
+      else
+         return &_mesa_texformat_sargb8;
    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: