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- /*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkSharingProc_DEFINED
- #define SkSharingProc_DEFINED
- #include <unordered_map>
- #include <vector>
- #include "include/core/SkData.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkSerialProcs.h"
- struct SkSharingSerialContext {
- // A map from the ids from SkImage::uniqueID() to ids used within the file
- std::unordered_map<uint32_t, uint32_t> fImageMap;
- // A serial proc that shares images between subpictures
- // To use this, create an instance of SkSerialProcs and populate it this way.
- // The client must retain ownership of the context.
- // auto ctx = std::make_unique<SkSharingSerialContext>()
- // SkSerialProcs procs;
- // procs.fImageProc = SkSharingSerialContext::serializeImage;
- // procs.fImageCtx = ctx.get();
- static sk_sp<SkData> serializeImage(SkImage* img, void* ctx);
- };
- struct SkSharingDeserialContext {
- // a list of unique images in the order they were encountered in the file
- // Subsequent occurrences of an image refer to it by it's index in this list.
- std::vector<sk_sp<SkImage>> fImages;
- // A deserial proc that can interpret id's in place of images as references to previous images.
- // Can also deserialize a SKP where all images are inlined (it's backwards compatible)
- static sk_sp<SkImage> deserializeImage(const void* data, size_t length, void* ctx);
- };
- #endif
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