Implement vertex buffer caching in the tessellated path renderer.

tests/ResourceCacheTest.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 here to ensure SK_SUPPORT_GPU is set correctly before it is examined.
 #include "SkTypes.h"
 
@@ skipping 1205 matching lines @@
     for (int i = 0; i < kResourceCnt; ++i) {
         GrUniqueKey key1, key2;
         make_unique_key<1>(&key1, i);
         make_unique_key<2>(&key2, i);
 
         REPORTER_ASSERT(reporter, !cache->hasUniqueKey(key1));
         REPORTER_ASSERT(reporter, !cache->hasUniqueKey(key2));
     }
 }
 
+static void test_custom_data(skiatest::Reporter* reporter) {
+    GrUniqueKey key1, key2;
+    int foo = 4132;
+    key1.setCustomData(SkData::NewWithCopy(&foo, sizeof(foo)));
+    REPORTER_ASSERT(reporter, *(int*) key1.getCustomData()->data() == 4132);
+    REPORTER_ASSERT(reporter, key2.getCustomData() == nullptr);
+
+    // Test that copying a key also takes a ref on its custom data.
+    GrUniqueKey key3 = key1;
+    REPORTER_ASSERT(reporter, *(int*) key3.getCustomData()->data() == 4132);

[bsalomon, 2015/08/03 19:34:54]

Can you test that if you stick a resource in the cache, unref it,  and retrieve
it by key that the custom data is correct? Just want to make sure we don't ever
lose track of the data while the resource isn't being used.

[Stephen White, 2015/08/03 19:52:24]

Done.

+}
+
 ////////////////////////////////////////////////////////////////////////////////
 DEF_GPUTEST(ResourceCache, reporter, factory) {
     for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
         GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
         if (!GrContextFactory::IsRenderingGLContext(glType)) {
             continue;
         }
         GrContext* context = factory->get(glType);
         if (NULL == context) {
             continue;
@@ skipping 19 matching lines @@
     test_duplicate_unique_key(reporter);
     test_duplicate_scratch_key(reporter);
     test_remove_scratch_key(reporter);
     test_scratch_key_consistency(reporter);
     test_purge_invalidated(reporter);
     test_cache_chained_purge(reporter);
     test_resource_size_changed(reporter);
     test_timestamp_wrap(reporter);
     test_flush(reporter);
     test_large_resource_count(reporter);
+    test_custom_data(reporter);
 }
 
 #endif