blob: 12a7b80941e6a6e8fa15442eb1c5dd72c0621601 [file] [log] [blame]
* 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);