Add MESA detection to GrContextInfo and use to decide whether to use GL_ALPHA or GL_RED.
Based on yunchao.he@intel.com's original change here: https://codereview.chromium.org/15994006/
R=yunchao.he@intel.com, robertphillips@google.com
Author: bsalomon@google.com
Review URL: https://chromiumcodereview.appspot.com/16955005
git-svn-id: http://skia.googlecode.com/svn/trunk@9608 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLContext.h b/src/gpu/gl/GrGLContext.h
index 172cd8b..34f2190 100644
--- a/src/gpu/gl/GrGLContext.h
+++ b/src/gpu/gl/GrGLContext.h
@@ -47,6 +47,8 @@
GrGLVersion version() const { return fGLVersion; }
GrGLSLGeneration glslGeneration() const { return fGLSLGeneration; }
GrGLVendor vendor() const { return fVendor; }
+ /** Is this a mesa-based driver. Does not mean it is the osmesa software rasterizer. */
+ bool isMesa() const { return fIsMesa; }
const GrGLCaps* caps() const { return fGLCaps.get(); }
GrGLCaps* caps() { return fGLCaps; }
const GrGLExtensions& extensions() const { return fExtensions; }
@@ -73,6 +75,7 @@
GrGLSLGeneration fGLSLGeneration;
GrGLVendor fVendor;
GrGLExtensions fExtensions;
+ bool fIsMesa;
SkAutoTUnref<GrGLCaps> fGLCaps;
};