Implement vertex buffer caching in the tessellated path renderer.

tests/TessellatingPathRendererTests.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPath.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 214 matching lines @@
 static SkPath create_path_15() {
     SkPath path;
     path.moveTo(    0.0f,   0.0f);
     path.lineTo(10000.0f,   0.0f);
     path.lineTo(    0.0f,  -1.0f);
     path.lineTo(10000.0f,   0.000001f);
     path.lineTo(    0.0f, -30.0f);
     return path;
 }
 
-static void test_path(GrDrawTarget* dt, GrRenderTarget* rt, const SkPath& path) {
-    GrTessellatingPathRenderer tess;
+static void test_path(GrContext* context, GrDrawTarget* dt, GrRenderTarget* rt, const SkPath& path) {
+    GrTessellatingPathRenderer tess(context);
     GrPipelineBuilder pipelineBuilder;
     pipelineBuilder.setRenderTarget(rt);
     GrStrokeInfo stroke(SkStrokeRec::kFill_InitStyle);
     tess.drawPath(dt, &pipelineBuilder, SK_ColorWHITE, SkMatrix::I(), path, stroke, false);
 }
 
 DEF_GPUTEST(TessellatingPathRendererTests, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     if (NULL == context) {
         return;
     }
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = 800;
     desc.fHeight = 800;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fOrigin = kTopLeft_GrSurfaceOrigin;
     SkAutoTUnref<GrTexture> texture(context->textureProvider()->refScratchTexture(desc,
         GrTextureProvider::kExact_ScratchTexMatch));
     GrTestTarget tt;
     context->getTestTarget(&tt);
     GrRenderTarget* rt = texture->asRenderTarget();
     GrDrawTarget* dt = tt.target();
 
-    test_path(dt, rt, create_path_0());
-    test_path(dt, rt, create_path_1());
-    test_path(dt, rt, create_path_2());
-    test_path(dt, rt, create_path_3());
-    test_path(dt, rt, create_path_4());
-    test_path(dt, rt, create_path_5());
-    test_path(dt, rt, create_path_6());
-    test_path(dt, rt, create_path_7());
-    test_path(dt, rt, create_path_8());
-    test_path(dt, rt, create_path_9());
-    test_path(dt, rt, create_path_10());
-    test_path(dt, rt, create_path_11());
-    test_path(dt, rt, create_path_12());
-    test_path(dt, rt, create_path_13());
-    test_path(dt, rt, create_path_14());
-    test_path(dt, rt, create_path_15());
+    test_path(context, dt, rt, create_path_0());
+    test_path(context, dt, rt, create_path_1());
+    test_path(context, dt, rt, create_path_2());
+    test_path(context, dt, rt, create_path_3());
+    test_path(context, dt, rt, create_path_4());
+    test_path(context, dt, rt, create_path_5());
+    test_path(context, dt, rt, create_path_6());
+    test_path(context, dt, rt, create_path_7());
+    test_path(context, dt, rt, create_path_8());
+    test_path(context, dt, rt, create_path_9());
+    test_path(context, dt, rt, create_path_10());
+    test_path(context, dt, rt, create_path_11());
+    test_path(context, dt, rt, create_path_12());
+    test_path(context, dt, rt, create_path_13());
+    test_path(context, dt, rt, create_path_14());
+    test_path(context, dt, rt, create_path_15());
 }
 #endif