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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPictureData_DEFINED
#define SkPictureData_DEFINED
#include "SkBitmap.h"
#include "SkDrawable.h"
#include "SkPicture.h"
#include "SkPictureFlat.h"
#include "SkTArray.h"
#include <memory>
class SkData;
class SkPictureRecord;
class SkReader32;
struct SkSerialProcs;
class SkStream;
class SkWStream;
class SkBBoxHierarchy;
class SkMatrix;
class SkPaint;
class SkPath;
class SkReadBuffer;
class SkTextBlob;
struct SkPictInfo {
SkPictInfo() : fVersion(~0U) {}
uint32_t getVersion() const {
SkASSERT(fVersion != ~0U);
return fVersion;
}
void setVersion(uint32_t version) {
SkASSERT(version != ~0U);
fVersion = version;
}
public:
char fMagic[8];
private:
uint32_t fVersion;
public:
SkRect fCullRect;
};
#define SK_PICT_READER_TAG SkSetFourByteTag('r', 'e', 'a', 'd')
#define SK_PICT_FACTORY_TAG SkSetFourByteTag('f', 'a', 'c', 't')
#define SK_PICT_TYPEFACE_TAG SkSetFourByteTag('t', 'p', 'f', 'c')
#define SK_PICT_PICTURE_TAG SkSetFourByteTag('p', 'c', 't', 'r')
#define SK_PICT_DRAWABLE_TAG SkSetFourByteTag('d', 'r', 'a', 'w')
// This tag specifies the size of the ReadBuffer, needed for the following tags
#define SK_PICT_BUFFER_SIZE_TAG SkSetFourByteTag('a', 'r', 'a', 'y')
// these are all inside the ARRAYS tag
#define SK_PICT_PAINT_BUFFER_TAG SkSetFourByteTag('p', 'n', 't', ' ')
#define SK_PICT_PATH_BUFFER_TAG SkSetFourByteTag('p', 't', 'h', ' ')
#define SK_PICT_TEXTBLOB_BUFFER_TAG SkSetFourByteTag('b', 'l', 'o', 'b')
#define SK_PICT_VERTICES_BUFFER_TAG SkSetFourByteTag('v', 'e', 'r', 't')
#define SK_PICT_IMAGE_BUFFER_TAG SkSetFourByteTag('i', 'm', 'a', 'g')
// Always write this guy last (with no length field afterwards)
#define SK_PICT_EOF_TAG SkSetFourByteTag('e', 'o', 'f', ' ')
template <typename T>
T* read_index_base_1_or_null(SkReadBuffer* reader, const SkTArray<sk_sp<T>>& array) {
int index = reader->readInt();
return reader->validate(index > 0 && index <= array.count()) ? array[index - 1].get() : nullptr;
}
class SkPictureData {
public:
SkPictureData(const SkPictureRecord& record, const SkPictInfo&);
// Does not affect ownership of SkStream.
static SkPictureData* CreateFromStream(SkStream*,
const SkPictInfo&,
const SkDeserialProcs&,
SkTypefacePlayback*);
static SkPictureData* CreateFromBuffer(SkReadBuffer&, const SkPictInfo&);
void serialize(SkWStream*, const SkSerialProcs&, SkRefCntSet*) const;
void flatten(SkWriteBuffer&) const;
const sk_sp<SkData>& opData() const { return fOpData; }
protected:
explicit SkPictureData(const SkPictInfo& info);
// Does not affect ownership of SkStream.
bool parseStream(SkStream*, const SkDeserialProcs&, SkTypefacePlayback*);
bool parseBuffer(SkReadBuffer& buffer);
public:
const SkImage* getImage(SkReadBuffer* reader) const {
// images are written base-0, unlike paths, pictures, drawables, etc.
const int index = reader->readInt();
return reader->validateIndex(index, fImages.count()) ? fImages[index].get() : nullptr;
}
const SkPath& getPath(SkReadBuffer* reader) const {
int index = reader->readInt();
return reader->validate(index > 0 && index <= fPaths.count()) ?
fPaths[index - 1] : fEmptyPath;
}
const SkPicture* getPicture(SkReadBuffer* reader) const {
return read_index_base_1_or_null(reader, fPictures);
}
SkDrawable* getDrawable(SkReadBuffer* reader) const {
return read_index_base_1_or_null(reader, fDrawables);
}
const SkPaint* getPaint(SkReadBuffer* reader) const {
int index = reader->readInt();
if (index == 0) {
return nullptr; // recorder wrote a zero for no paint (likely drawimage)
}
return reader->validate(index > 0 && index <= fPaints.count()) ?
&fPaints[index - 1] : nullptr;
}
const SkTextBlob* getTextBlob(SkReadBuffer* reader) const {
return read_index_base_1_or_null(reader, fTextBlobs);
}
const SkVertices* getVertices(SkReadBuffer* reader) const {
return read_index_base_1_or_null(reader, fVertices);
}
private:
// these help us with reading/writing
// Does not affect ownership of SkStream.
bool parseStreamTag(SkStream*, uint32_t tag, uint32_t size,
const SkDeserialProcs&, SkTypefacePlayback*);
void parseBufferTag(SkReadBuffer&, uint32_t tag, uint32_t size);
void flattenToBuffer(SkWriteBuffer&) const;
SkTArray<SkPaint> fPaints;
SkTArray<SkPath> fPaths;
sk_sp<SkData> fOpData; // opcodes and parameters
const SkPath fEmptyPath;
const SkBitmap fEmptyBitmap;
SkTArray<sk_sp<const SkPicture>> fPictures;
SkTArray<sk_sp<SkDrawable>> fDrawables;
SkTArray<sk_sp<const SkTextBlob>> fTextBlobs;
SkTArray<sk_sp<const SkVertices>> fVertices;
SkTArray<sk_sp<const SkImage>> fImages;
SkTypefacePlayback fTFPlayback;
std::unique_ptr<SkFactoryPlayback> fFactoryPlayback;
const SkPictInfo fInfo;
static void WriteFactories(SkWStream* stream, const SkFactorySet& rec);
static void WriteTypefaces(SkWStream* stream, const SkRefCntSet& rec);
void initForPlayback() const;
};
#endif
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