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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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