/* * Copyright 2016 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef SkUrlDataManager_DEFINED #define SkUrlDataManager_DEFINED #include "include/core/SkData.h" #include "include/core/SkImage.h" #include "include/core/SkString.h" #include "src/core/SkOpts.h" #include "src/core/SkTDynamicHash.h" #include <unordered_map> /* * A simple class which allows clients to add opaque data types, and returns a url where this data * will be hosted. Its up to the owner of this class to actually serve the data. */ bool operator==(const SkData& a, const SkData& b); class UrlDataManager { public: UrlDataManager(SkString rootUrl); ~UrlDataManager() { this->reset(); } /* * Adds a data blob to the cache with a particular content type. UrlDataManager will hash * the blob data to ensure uniqueness */ SkString addData(SkData*, const char* contentType); struct UrlData : public SkRefCnt { SkString fUrl; SkString fContentType; sk_sp<SkData> fData; }; /* * returns the UrlData object which should be hosted at 'url' */ UrlData* getDataFromUrl(SkString url) { return fUrlLookup.find(url); } void reset(); // Methods used to identify images differently in wasm debugger for mskp animations. // serving is uncessary, as a collection of images with identifiers is already present, we // just want to use it when serializing commands. /* * Construct an index from a list of images * (expected to be the list that was loaded from the mskp file) * Use only once. */ void indexImages(const std::vector<sk_sp<SkImage>>&); /* * Reports whether this UDM has an initialized image index (effevitely whether we're in wasm) */ bool hasImageIndex() { return imageMap.size() > 0; } /* * Return the file id (index of the image in the originally provided list) of an SkImage */ int lookupImage(const SkImage*); private: struct LookupTrait { // We use the data as a hash, this is not really optimal but is fine until proven otherwise static const SkData& GetKey(const UrlData& data) { return *data.fData.get(); } static uint32_t Hash(const SkData& key) { return SkOpts::hash(key.bytes(), key.size()); } }; struct ReverseLookupTrait { static const SkString& GetKey(const UrlData& data) { return data.fUrl; } static uint32_t Hash(const SkString& key) { return SkOpts::hash(key.c_str(), strlen(key.c_str())); } }; SkString fRootUrl; SkTDynamicHash<UrlData, SkData, LookupTrait> fCache; SkTDynamicHash<UrlData, SkString, ReverseLookupTrait> fUrlLookup; uint32_t fDataId; std::unordered_map<const SkImage*, int> imageMap; }; #endif