add kGray_8_SkColorType

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGr.h"
 
 #include "GrXferProcessor.h"
@@ skipping 576 matching lines @@
             return kRGBA_4444_GrPixelConfig;
         case kRGBA_8888_SkColorType:
 //            if (kSRGB_SkColorProfileType == pt) {
 //                return kSRGBA_8888_GrPixelConfig;
 //            }
             return kRGBA_8888_GrPixelConfig;
         case kBGRA_8888_SkColorType:
             return kBGRA_8888_GrPixelConfig;
         case kIndex_8_SkColorType:
             return kIndex_8_GrPixelConfig;
+        case kGray_8_SkColorType:
+            return kAlpha_8_GrPixelConfig; // TODO: gray8 support on gpu
     }
     SkASSERT(0);    // shouldn't get here
     return kUnknown_GrPixelConfig;
 }
 
 bool GrPixelConfig2ColorAndProfileType(GrPixelConfig config, SkColorType* ctOut,
                                        SkColorProfileType* ptOut) {
     SkColorType ct;
     SkColorProfileType pt = kLinear_SkColorProfileType;
     switch (config) {
@@ skipping 113 matching lines @@
         if (shader->asFragmentProcessor(context, skPaint, viewM, NULL, &paintColor, &fp) && fp) {
             grPaint->addColorProcessor(fp)->unref();
             constantColor = false;
         }
     }
 
     // The grcolor is automatically set when calling asFragmentProcessor.
     // If the shader can be seen as an effect it returns true and adds its effect to the grpaint.
     SkPaint2GrPaintNoShader(context, rt, skPaint, paintColor, constantColor, grPaint);
 }