mesa: EXT_framebuffer_sRGB interface additions.

This adds the get/enable enums and internal gl_config storage
for this extension.

In theory this is all that is needed to enable this extension
from what I can see, since its not mandatory to implement the
features if you don't advertise the visuals or the fb configs.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/main/enable.c

@@ -968,6 +968,12 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          }
          break;
 
+      /* GL3.0 - GL_framebuffer_sRGB */
+      case GL_FRAMEBUFFER_SRGB_EXT:
+	 CHECK_EXTENSION(EXT_framebuffer_sRGB, cap);
+	 ctx->Color.sRGBEnabled = state;
+	 break;
+
       default:
          goto invalid_enum_error;
    }
@@ -1480,6 +1486,11 @@ _mesa_IsEnabled( GLenum cap )
          }
          return ctx->Array.PrimitiveRestart;
 
+      /* GL3.0 - GL_framebuffer_sRGB */
+      case GL_FRAMEBUFFER_SRGB_EXT:
+	 CHECK_EXTENSION(EXT_framebuffer_sRGB);
+	 return ctx->Color.sRGBEnabled;
+
       default:
          goto invalid_enum_error;
    }

src/mesa/main/get.c

@@ -317,6 +317,7 @@ EXTRA_EXT2(ARB_vertex_program, ARB_fragment_program);
 EXTRA_EXT(ARB_vertex_buffer_object);
 EXTRA_EXT(ARB_geometry_shader4);
 EXTRA_EXT(ARB_copy_buffer);
+EXTRA_EXT(EXT_framebuffer_sRGB);
 
 static const int
 extra_ARB_vertex_program_ARB_fragment_program_NV_vertex_program[] = {
@@ -1238,6 +1239,10 @@ static const struct value_desc values[] = {
    { GL_MINOR_VERSION, CONTEXT_INT(VersionMinor), extra_version_30  },
    { GL_CONTEXT_FLAGS, CONTEXT_INT(Const.ContextFlags), extra_version_30  },
 
+   /* GL3.0 / GL_EXT_framebuffer_sRGB */
+   { GL_FRAMEBUFFER_SRGB_EXT, CONTEXT_BOOL(Color.sRGBEnabled), extra_EXT_framebuffer_sRGB },
+   { GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, BUFFER_INT(Visual.sRGBCapable), extra_EXT_framebuffer_sRGB },
+
    /* GL 3.1 */
    /* NOTE: different enum values for GL_PRIMITIVE_RESTART_NV
     * vs. GL_PRIMITIVE_RESTART!

src/mesa/main/mtypes.h

@@ -524,6 +524,9 @@ struct gl_config
    GLint bindToMipmapTexture;
    GLint bindToTextureTargets;
    GLint yInverted;
+
+   /* EXT_framebuffer_sRGB */
+   GLint sRGBCapable;
 };
 
 
@@ -754,6 +757,8 @@ struct gl_colorbuffer_attrib
 
    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
+
+   GLboolean sRGBEnabled;	/**< Framebuffer sRGB blending/updating requested */
 };