Add runtime flag to turn compressed alpha masks on

tools/PictureRenderer.cpp

Index: tools/PictureRenderer.cpp
diff --git a/tools/PictureRenderer.cpp b/tools/PictureRenderer.cpp
index dd4cea481d1f6b1f86fea400400b79a607fa13e2..7325c201b8ea2fd56acc0b82420fab265acdd2fd 100644
--- a/tools/PictureRenderer.cpp
+++ b/tools/PictureRenderer.cpp
@@ -444,8 +444,14 @@ SkString SimplePictureRenderer::getConfigNameInternal() {
 
 ///////////////////////////////////////////////////////////////////////////////////////////////
 
+#if SK_SUPPORT_GPU
+TiledPictureRenderer::TiledPictureRenderer(const GrContext::Options& opts)
+    : INHERITED(opts)        
+    , fTileWidth(kDefaultTileWidth)
+#else
 TiledPictureRenderer::TiledPictureRenderer()
     : fTileWidth(kDefaultTileWidth)
+#endif
     , fTileHeight(kDefaultTileHeight)
     , fTileWidthPercentage(0.0)
     , fTileHeightPercentage(0.0)
@@ -745,6 +751,10 @@ SkBBHFactory* PictureRenderer::getFactory() {
 
 class GatherRenderer : public PictureRenderer {
 public:
+#if SK_SUPPORT_GPU
+    GatherRenderer(const GrContext::Options& opts) : INHERITED(opts) { }
+#endif
+
     virtual bool render(SkBitmap** out = NULL) SK_OVERRIDE {
         SkRect bounds = SkRect::MakeWH(SkIntToScalar(fPicture->width()),
                                        SkIntToScalar(fPicture->height()));
@@ -758,10 +768,18 @@ private:
     virtual SkString getConfigNameInternal() SK_OVERRIDE {
         return SkString("gather_pixelrefs");
     }
+
+    typedef PictureRenderer INHERITED;
 };
 
+#if SK_SUPPORT_GPU
+PictureRenderer* CreateGatherPixelRefsRenderer(const GrContext::Options& opts) {
+    return SkNEW_ARGS(GatherRenderer, (opts));
+}
+#else
 PictureRenderer* CreateGatherPixelRefsRenderer() {
     return SkNEW(GatherRenderer);
 }
+#endif
 
 } // namespace sk_tools