GLenum type, GLboolean uses_blit);
extern GLboolean
-_mesa_need_rgb_to_luminance_conversion(mesa_format texFormat, GLenum format);
+_mesa_need_rgb_to_luminance_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat);
+
+extern GLboolean
+_mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat);
extern GLbitfield
_mesa_get_readpixels_transfer_ops(const struct gl_context *ctx,