separate state for msaa renderability

src/effects/SkBitmapAlphaThresholdShader.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapAlphaThresholdShader.h"
 
 class BATShader : public SkShader {
@@ skipping 200 matching lines @@
     return ThresholdEffect::Create(bmpTex, SkMatrix::I(), maskTex, SkMatrix::I(), thresh);
 }
 
 GrEffectRef* BATShader::asNewEffect(GrContext* context, const SkPaint& paint) const {
     SkMatrix localInverse;
     if (!this->getLocalMatrix().invert(&localInverse)) {
         return NULL;
     }
 
     GrTextureDesc maskDesc;
-    if (context->isConfigRenderable(kAlpha_8_GrPixelConfig)) {
+    if (context->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
         maskDesc.fConfig = kAlpha_8_GrPixelConfig;
     } else {
         maskDesc.fConfig = kRGBA_8888_GrPixelConfig;
     }
     maskDesc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
     const SkIRect& bounds = fRegion.getBounds();
     // Add one pixel of border to ensure that clamp mode will be all zeros
     // the outside.
     maskDesc.fWidth = bounds.width() + 2;
     maskDesc.fHeight = bounds.height() + 2;
@@ skipping 36 matching lines @@
     GrEffectRef* effect = ThresholdEffect::Create(bmpTexture, bmpMatrix,
                                                   maskTexture, maskMatrix,
                                                   fThreshold);
 
     GrUnlockAndUnrefCachedBitmapTexture(bmpTexture);
 
     return effect;
 }
 
 #endif