[Mesa-dev] [PATCH 5/5] i915: Add support for GL_EXT_texture_sRGB and GL_EXT_texture_sRGB_decode.

[Eric Anholt]

This brings the driver up to GL 2.1.
---
 src/mesa/drivers/dri/i915/i915_context.c      |    2 ++
 src/mesa/drivers/dri/i915/i915_texstate.c     |   11 +++++++++++
 src/mesa/drivers/dri/intel/intel_extensions.c |    4 ++--
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i915/i915_context.c b/src/mesa/drivers/dri/i915/i915_context.c
index 46fc966..65b50ea 100644
--- a/src/mesa/drivers/dri/i915/i915_context.c
+++ b/src/mesa/drivers/dri/i915/i915_context.c
@@ -104,6 +104,8 @@ intel_init_texture_formats(struct gl_context *ctx)
    if (intel_screen->deviceID != PCI_CHIP_I830_M &&
        intel_screen->deviceID != PCI_CHIP_845_G)
       ctx->TextureFormatSupported[MESA_FORMAT_XRGB8888] = true;
+   if (intel->gen == 3)
+      ctx->TextureFormatSupported[MESA_FORMAT_SARGB8] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_ARGB4444] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_ARGB1555] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_RGB565] = true;
diff --git a/src/mesa/drivers/dri/i915/i915_texstate.c b/src/mesa/drivers/dri/i915/i915_texstate.c
index 2f32869..43c802b 100644
--- a/src/mesa/drivers/dri/i915/i915_texstate.c
+++ b/src/mesa/drivers/dri/i915/i915_texstate.c
@@ -56,6 +56,7 @@ translate_texture_format(gl_format mesa_format, GLenum DepthMode)
       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
    case MESA_FORMAT_ARGB4444:
       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
+   case MESA_FORMAT_SARGB8:
    case MESA_FORMAT_ARGB8888:
       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
    case MESA_FORMAT_XRGB8888:
@@ -78,10 +79,14 @@ translate_texture_format(gl_format mesa_format, GLenum DepthMode)
           return (MAPSURF_16BIT | MT_16BIT_L16);
    case MESA_FORMAT_RGBA_DXT1:
    case MESA_FORMAT_RGB_DXT1:
+   case MESA_FORMAT_SRGB_DXT1:
+   case MESA_FORMAT_SRGBA_DXT1:
       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
    case MESA_FORMAT_RGBA_DXT3:
+   case MESA_FORMAT_SRGBA_DXT3:
       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
    case MESA_FORMAT_RGBA_DXT5:
+   case MESA_FORMAT_SRGBA_DXT5:
       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
    case MESA_FORMAT_S8_Z24:
    case MESA_FORMAT_X8_Z24:
@@ -354,6 +359,12 @@ i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
 
    }
 
+   if (sampler->sRGBDecode == GL_DECODE_EXT &&
+       (_mesa_get_srgb_format_linear(firstImage->TexFormat) !=
+        firstImage->TexFormat)) {
+      state[I915_TEXREG_SS2] |= SS2_REVERSE_GAMMA_ENABLE;
+   }
+
    /* convert border color from float to ubyte */
    CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
    CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 879d0a5..60e9d01 100755
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -153,8 +153,6 @@ intelInitExtensions(struct gl_context *ctx)
       ctx->Extensions.EXT_texture_array = true;
       ctx->Extensions.EXT_texture_integer = true;
       ctx->Extensions.EXT_texture_snorm = true;
-      ctx->Extensions.EXT_texture_sRGB = true;
-      ctx->Extensions.EXT_texture_sRGB_decode = true;
       ctx->Extensions.EXT_texture_swizzle = true;
       ctx->Extensions.EXT_vertex_array_bgra = true;
       ctx->Extensions.ATI_envmap_bumpmap = true;
@@ -170,6 +168,8 @@ intelInitExtensions(struct gl_context *ctx)
       ctx->Extensions.ARB_fragment_program = true;
       ctx->Extensions.ARB_shadow = true;
       ctx->Extensions.ARB_texture_non_power_of_two = true;
+      ctx->Extensions.EXT_texture_sRGB = true;
+      ctx->Extensions.EXT_texture_sRGB_decode = true;
       ctx->Extensions.EXT_shadow_funcs = true;
       ctx->Extensions.EXT_stencil_two_side = true;
       ctx->Extensions.ATI_separate_stencil = true;
-- 
1.7.10.4