glsl: lower mediump partial derivatives

[mesa.git] / src / mesa / main / buffers.h

diff --git a/src/mesa/main/buffers.h b/src/mesa/main/buffers.h
index c24b636e19d87c00f92a428f02ff6c1b24b85f82..28e26b575583947680b844bfb930b42862720d64 100644 (file)
--- a/src/mesa/main/buffers.h
+++ b/src/mesa/main/buffers.h
@@ -78,6 +78,10 @@ _mesa_readbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
 extern void
 _mesa_update_draw_buffers(struct gl_context *ctx);
 
+extern GLenum
+_mesa_back_to_front_if_single_buffered(const struct gl_framebuffer *fb,
+                                       GLenum buffer);
+
 void GLAPIENTRY
 _mesa_ReadBuffer_no_error(GLenum mode);