From f7b5e616e07b5caa27e91bb5733a8a849d5963f6 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Tue, 6 Oct 2009 18:56:29 -0600
Subject: [PATCH] mesa: added _mesa_get_format_color_encoding()

---
 src/mesa/main/formats.c | 25 +++++++++++++++++++++++++
 src/mesa/main/formats.h |  3 +++
 2 files changed, 28 insertions(+)

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 9bc0509..d1d8491 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -638,6 +638,31 @@ _mesa_is_format_compressed(gl_format format)
 
 
 /**
+ * Return color encoding for given format.
+ * \return GL_LINEAR or GL_SRGB
+ */
+GLenum
+_mesa_get_format_color_encoding(gl_format format)
+{
+   /* XXX this info should be encoded in gl_format_info */
+   switch (format) {
+   case MESA_FORMAT_SRGB8:
+   case MESA_FORMAT_SRGBA8:
+   case MESA_FORMAT_SARGB8:
+   case MESA_FORMAT_SL8:
+   case MESA_FORMAT_SLA8:
+   case MESA_FORMAT_SRGB_DXT1:
+   case MESA_FORMAT_SRGBA_DXT1:
+   case MESA_FORMAT_SRGBA_DXT3:
+   case MESA_FORMAT_SRGBA_DXT5:
+      return GL_SRGB;
+   default:
+      return GL_LINEAR;
+   }
+}
+
+
+/**
  * Return number of bytes needed to store an image of the given size
  * in the given format.
  */
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index 6aebb85..fcedbe9 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -152,6 +152,9 @@ _mesa_get_format_base_format(gl_format format);
 extern GLboolean
 _mesa_is_format_compressed(gl_format format);
 
+extern GLenum
+_mesa_get_format_color_encoding(gl_format format);
+
 extern GLuint
 _mesa_format_image_size(gl_format format, GLsizei width,
                         GLsizei height, GLsizei depth);
-- 
2.7.4