Add gltestpersistentcache config that tests GrContextOption's cache.
Uses a new GPU sink that runs each test twice, once to populate the
cache and then again with a new GrContext but a warmed cache. It
verifies that the two generated images are the same.
Change-Id: Iaba195a69751f14ea946afe7174228a813b83a63
Reviewed-on: https://skia-review.googlesource.com/140567
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/tools/gpu/MemoryCache.h b/tools/gpu/MemoryCache.h
new file mode 100644
index 0000000..568f755
--- /dev/null
+++ b/tools/gpu/MemoryCache.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef MemoryCache_DEFINED
+#define MemoryCache_DEFINED
+
+#include <unordered_map>
+#include "GrContextOptions.h"
+#include "SkChecksum.h"
+#include "SkData.h"
+
+namespace sk_gpu_test {
+
+/**
+ * This class can be used to maintain an in memory record of all programs cached by GrContext.
+ * It can be shared by multiple GrContexts so long as those GrContexts are created with the same
+ * options and will have the same GrCaps (e.g. same backend, same GL context creation parameters,
+ * ...).
+ */
+class MemoryCache : public GrContextOptions::PersistentCache {
+public:
+ MemoryCache() = default;
+ MemoryCache(const MemoryCache&) = delete;
+ MemoryCache& operator=(const MemoryCache&) = delete;
+
+ sk_sp<SkData> load(const SkData& key) override;
+ void store(const SkData& key, const SkData& data) override;
+ int numCacheMisses() const { return fCacheMissCnt; }
+ void resetNumCacheMisses() { fCacheMissCnt = 0; }
+
+private:
+ struct Key {
+ Key() = default;
+ Key(const SkData& key) : fKey(SkData::MakeWithCopy(key.data(), key.size())) {}
+ Key(const Key& that) = default;
+ Key& operator=(const Key&) = default;
+ bool operator==(const Key& that) const {
+ return that.fKey->size() == fKey->size() &&
+ !memcmp(fKey->data(), that.fKey->data(), that.fKey->size());
+ }
+ sk_sp<const SkData> fKey;
+ };
+
+ struct Hash {
+ using argument_type = Key;
+ using result_type = uint32_t;
+ uint32_t operator()(const Key& key) const {
+ return key.fKey ? SkOpts::hash_fn(key.fKey->data(), key.fKey->size(), 0) : 0;
+ }
+ };
+
+ int fCacheMissCnt = 0;
+ std::unordered_map<Key, sk_sp<SkData>, Hash> fMap;
+};
+
+} // namespace sk_gpu_test
+
+#endif