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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.
*/
#include "tools/SkSharingProc.h"
#include "include/core/SkData.h"
#include "include/core/SkImage.h"
#include "include/core/SkSerialProcs.h"
sk_sp<SkData> SkSharingSerialContext::serializeImage(SkImage* img, void* ctx) {
SkSharingSerialContext* context = reinterpret_cast<SkSharingSerialContext*>(ctx);
uint32_t id = img->uniqueID(); // get this process's id for the image. these are not hashes.
// find out if we have already serialized this, and if so, what its in-file id is.
auto iter = context->fImageMap.find(id);
if (iter == context->fImageMap.end()) {
// When not present, add its id to the map and return its usual serialized form.
context->fImageMap[id] = context->fImageMap.size();
return img->encodeToData();
}
uint32_t fid = context->fImageMap[id];
// if present, return only the in-file id we registered the first time we serialized it.
return SkData::MakeWithCopy(&fid, sizeof(fid));
}
sk_sp<SkImage> SkSharingDeserialContext::deserializeImage(
const void* data, size_t length, void* ctx) {
SkSharingDeserialContext* context = reinterpret_cast<SkSharingDeserialContext*>(ctx);
uint32_t fid;
// If the data is an image fid, look up an already deserialized image from our map
if (length == sizeof(fid)) {
memcpy(&fid, data, sizeof(fid));
if (fid >= context->fImages.size()) {
SkDebugf("We do not have the data for image %d.\n", fid);
return nullptr;
}
return context->fImages[fid];
}
// Otherwise, the data is an image, deserialise it, store it in our map at its fid.
// TODO(nifong): make DeserialProcs accept sk_sp<SkData> so we don't have to copy this.
sk_sp<SkData> dataView = SkData::MakeWithCopy(data, length);
const sk_sp<SkImage> image = SkImage::MakeFromEncoded(std::move(dataView));
context->fImages.push_back(image);
return image;
}
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