mesa/glformats: Add a helper function _mesa_is_srgb_format()

Returns true if the passed format is an sRGB format, false otherwise.

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

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index 3df845576a94953dc43472295527b1928f082dd5..d29d70d4604a2098be3a142526dade3124c09e73 100644 (file)
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -1338,6 +1338,51 @@ _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
    }
 }
 
+/**
+ * Test if the given format represents an sRGB format.
+ * \param format the GL format (can be an internal format)
+ * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
+ */
+GLboolean
+_mesa_is_srgb_format(GLenum format)
+{
+   switch (format) {
+   case GL_SRGB:
+   case GL_SRGB8:
+   case GL_SRGB_ALPHA:
+   case GL_SRGB8_ALPHA8:
+   case GL_COMPRESSED_SRGB:
+   case GL_COMPRESSED_SRGB_ALPHA:
+   case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+   case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+   case GL_COMPRESSED_SRGB8_ETC2:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
+   case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
+   case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
+   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
+      return GL_TRUE;
+   default:
+      break;
+   }
+
+   return GL_FALSE;
+}
+
 /**
  * Convert various unpack formats to the corresponding base format.
  */

diff --git a/src/mesa/main/glformats.h b/src/mesa/main/glformats.h
index b3668556da2dad5f1b768f48d40870d389a0bd1a..00d2767085da8d8ba87ad109cf4c621bc1ebf24c 100644 (file)
--- a/src/mesa/main/glformats.h
+++ b/src/mesa/main/glformats.h
@@ -101,6 +101,9 @@ _mesa_is_depth_or_stencil_format(GLenum format);
 extern GLboolean
 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format);
 
+extern GLboolean
+_mesa_is_srgb_format(GLenum format);
+
 extern GLenum
 _mesa_base_format_to_integer_format(GLenum format);