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- /*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "src/core/SkWriteBuffer.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkData.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkTypeface.h"
- #include "include/private/SkTo.h"
- #include "src/core/SkImagePriv.h"
- #include "src/core/SkPaintPriv.h"
- #include "src/core/SkPtrRecorder.h"
- ///////////////////////////////////////////////////////////////////////////////////////////////////
- SkBinaryWriteBuffer::SkBinaryWriteBuffer()
- : fFactorySet(nullptr)
- , fTFSet(nullptr) {
- }
- SkBinaryWriteBuffer::SkBinaryWriteBuffer(void* storage, size_t storageSize)
- : fFactorySet(nullptr)
- , fTFSet(nullptr)
- , fWriter(storage, storageSize)
- {}
- SkBinaryWriteBuffer::~SkBinaryWriteBuffer() {}
- bool SkBinaryWriteBuffer::usingInitialStorage() const {
- return fWriter.usingInitialStorage();
- }
- void SkBinaryWriteBuffer::writeByteArray(const void* data, size_t size) {
- fWriter.write32(SkToU32(size));
- fWriter.writePad(data, size);
- }
- void SkBinaryWriteBuffer::writeBool(bool value) {
- fWriter.writeBool(value);
- }
- void SkBinaryWriteBuffer::writeScalar(SkScalar value) {
- fWriter.writeScalar(value);
- }
- void SkBinaryWriteBuffer::writeScalarArray(const SkScalar* value, uint32_t count) {
- fWriter.write32(count);
- fWriter.write(value, count * sizeof(SkScalar));
- }
- void SkBinaryWriteBuffer::writeInt(int32_t value) {
- fWriter.write32(value);
- }
- void SkBinaryWriteBuffer::writeIntArray(const int32_t* value, uint32_t count) {
- fWriter.write32(count);
- fWriter.write(value, count * sizeof(int32_t));
- }
- void SkBinaryWriteBuffer::writeUInt(uint32_t value) {
- fWriter.write32(value);
- }
- void SkBinaryWriteBuffer::writeString(const char* value) {
- fWriter.writeString(value);
- }
- void SkBinaryWriteBuffer::writeColor(SkColor color) {
- fWriter.write32(color);
- }
- void SkBinaryWriteBuffer::writeColorArray(const SkColor* color, uint32_t count) {
- fWriter.write32(count);
- fWriter.write(color, count * sizeof(SkColor));
- }
- void SkBinaryWriteBuffer::writeColor4f(const SkColor4f& color) {
- fWriter.write(&color, sizeof(SkColor4f));
- }
- void SkBinaryWriteBuffer::writeColor4fArray(const SkColor4f* color, uint32_t count) {
- fWriter.write32(count);
- fWriter.write(color, count * sizeof(SkColor4f));
- }
- void SkBinaryWriteBuffer::writePoint(const SkPoint& point) {
- fWriter.writeScalar(point.fX);
- fWriter.writeScalar(point.fY);
- }
- void SkBinaryWriteBuffer::writePoint3(const SkPoint3& point) {
- this->writePad32(&point, sizeof(SkPoint3));
- }
- void SkBinaryWriteBuffer::writePointArray(const SkPoint* point, uint32_t count) {
- fWriter.write32(count);
- fWriter.write(point, count * sizeof(SkPoint));
- }
- void SkBinaryWriteBuffer::writeMatrix(const SkMatrix& matrix) {
- fWriter.writeMatrix(matrix);
- }
- void SkBinaryWriteBuffer::writeIRect(const SkIRect& rect) {
- fWriter.write(&rect, sizeof(SkIRect));
- }
- void SkBinaryWriteBuffer::writeRect(const SkRect& rect) {
- fWriter.writeRect(rect);
- }
- void SkBinaryWriteBuffer::writeRegion(const SkRegion& region) {
- fWriter.writeRegion(region);
- }
- void SkBinaryWriteBuffer::writePath(const SkPath& path) {
- fWriter.writePath(path);
- }
- size_t SkBinaryWriteBuffer::writeStream(SkStream* stream, size_t length) {
- fWriter.write32(SkToU32(length));
- size_t bytesWritten = fWriter.readFromStream(stream, length);
- if (bytesWritten < length) {
- fWriter.reservePad(length - bytesWritten);
- }
- return bytesWritten;
- }
- bool SkBinaryWriteBuffer::writeToStream(SkWStream* stream) const {
- return fWriter.writeToStream(stream);
- }
- /* Format:
- * (subset) bounds
- * size (31bits)
- * data [ encoded, with raw width/height ]
- */
- void SkBinaryWriteBuffer::writeImage(const SkImage* image) {
- const SkIRect bounds = SkImage_getSubset(image);
- this->writeIRect(bounds);
- sk_sp<SkData> data;
- if (fProcs.fImageProc) {
- data = fProcs.fImageProc(const_cast<SkImage*>(image), fProcs.fImageCtx);
- }
- if (!data) {
- data = image->encodeToData();
- }
- size_t size = data ? data->size() : 0;
- if (!SkTFitsIn<int32_t>(size)) {
- size = 0; // too big to store
- }
- this->write32(SkToS32(size)); // writing 0 signals failure
- if (size) {
- this->writePad32(data->data(), size);
- }
- }
- void SkBinaryWriteBuffer::writeTypeface(SkTypeface* obj) {
- // Write 32 bits (signed)
- // 0 -- default font
- // >0 -- index
- // <0 -- custom (serial procs)
- if (obj == nullptr) {
- fWriter.write32(0);
- } else if (fProcs.fTypefaceProc) {
- auto data = fProcs.fTypefaceProc(obj, fProcs.fTypefaceCtx);
- if (data) {
- size_t size = data->size();
- if (!SkTFitsIn<int32_t>(size)) {
- size = 0; // fall back to default font
- }
- int32_t ssize = SkToS32(size);
- fWriter.write32(-ssize); // negative to signal custom
- if (size) {
- this->writePad32(data->data(), size);
- }
- return;
- }
- // no data means fall through for std behavior
- }
- fWriter.write32(fTFSet ? fTFSet->add(obj) : 0);
- }
- void SkBinaryWriteBuffer::writePaint(const SkPaint& paint) {
- SkPaintPriv::Flatten(paint, *this);
- }
- void SkBinaryWriteBuffer::setFactoryRecorder(sk_sp<SkFactorySet> rec) {
- fFactorySet = std::move(rec);
- }
- void SkBinaryWriteBuffer::setTypefaceRecorder(sk_sp<SkRefCntSet> rec) {
- fTFSet = std::move(rec);
- }
- void SkBinaryWriteBuffer::writeFlattenable(const SkFlattenable* flattenable) {
- if (nullptr == flattenable) {
- this->write32(0);
- return;
- }
- /*
- * We can write 1 of 2 versions of the flattenable:
- * 1. index into fFactorySet : This assumes the writer will later
- * resolve the function-ptrs into strings for its reader. SkPicture
- * does exactly this, by writing a table of names (matching the indices)
- * up front in its serialized form.
- * 2. string name of the flattenable or index into fFlattenableDict: We
- * store the string to allow the reader to specify its own factories
- * after write time. In order to improve compression, if we have
- * already written the string, we write its index instead.
- */
- SkFlattenable::Factory factory = flattenable->getFactory();
- SkASSERT(factory);
- if (fFactorySet) {
- this->write32(fFactorySet->add(factory));
- } else {
- if (uint32_t* indexPtr = fFlattenableDict.find(factory)) {
- // We will write the index as a 32-bit int. We want the first byte
- // that we send to be zero - this will act as a sentinel that we
- // have an index (not a string). This means that we will send the
- // the index shifted left by 8. The remaining 24-bits should be
- // plenty to store the index. Note that this strategy depends on
- // being little endian.
- SkASSERT(0 == *indexPtr >> 24);
- this->write32(*indexPtr << 8);
- } else {
- const char* name = flattenable->getTypeName();
- SkASSERT(name);
- // Otherwise write the string. Clients should not use the empty
- // string as a name, or we will have a problem.
- SkASSERT(0 != strcmp("", name));
- this->writeString(name);
- // Add key to dictionary.
- fFlattenableDict.set(factory, fFlattenableDict.count() + 1);
- }
- }
- // make room for the size of the flattened object
- (void)fWriter.reserve(sizeof(uint32_t));
- // record the current size, so we can subtract after the object writes.
- size_t offset = fWriter.bytesWritten();
- // now flatten the object
- flattenable->flatten(*this);
- size_t objSize = fWriter.bytesWritten() - offset;
- // record the obj's size
- fWriter.overwriteTAt(offset - sizeof(uint32_t), SkToU32(objSize));
- }
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