Improve caching of special case paths in GrStencilAndCoverPathRenderer

src/gpu/GrStencilAndCoverPathRenderer.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrStencilAndCoverPathRenderer.h"
@@ skipping 57 matching lines @@
 GrStencilAndCoverPathRenderer::onGetStencilSupport(const GrDrawTarget*,
                                                    const GrPipelineBuilder*,
                                                    const SkPath&,
                                                    const GrStrokeInfo&) const {
     return GrPathRenderer::kStencilOnly_StencilSupport;
 }
 
 static GrPath* get_gr_path(GrGpu* gpu, const SkPath& skPath, const GrStrokeInfo& stroke) {
     GrContext* ctx = gpu->getContext();
     GrUniqueKey key;
-    GrPath::ComputeKey(skPath, stroke, &key);
+    bool isVolatile;
+    GrPath::ComputeKey(skPath, stroke, &key, &isVolatile);
     SkAutoTUnref<GrPath> path(
         static_cast<GrPath*>(ctx->resourceProvider()->findAndRefResourceByUniqueKey(key)));
     if (NULL == path) {
         path.reset(gpu->pathRendering()->createPath(skPath, stroke));
-        ctx->resourceProvider()->assignUniqueKeyToResource(key, path);
+        if (!isVolatile) {
+            ctx->resourceProvider()->assignUniqueKeyToResource(key, path);
+        }
     } else {
         SkASSERT(path->isEqualTo(skPath, stroke));
     }
     return path.detach();
 }
 
 void GrStencilAndCoverPathRenderer::onStencilPath(GrDrawTarget* target,
                                                   GrPipelineBuilder* pipelineBuilder,
                                                   const SkMatrix& viewMatrix,
                                                   const SkPath& path,
@@ skipping 64 matching lines @@
             0xffff);
 
         pipelineBuilder->setStencil(kStencilPass);
         SkAutoTUnref<GrPathProcessor> pp(GrPathProcessor::Create(color, viewMatrix));
         target->drawPath(pipelineBuilder, pp, p, convert_skpath_filltype(path.getFillType()));
     }
 
     pipelineBuilder->stencil()->setDisabled();
     return true;
 }