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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.
*/
#ifndef SkFlattenableBuffers_DEFINED
#define SkFlattenableBuffers_DEFINED
#include "SkColor.h"
#include "SkPaint.h"
#include "SkPoint.h"
class SkBitmap;
class SkFlattenable;
struct SkIRect;
class SkMatrix;
class SkOrderedReadBuffer;
class SkOrderedWriteBuffer;
class SkPath;
class SkPixelRef;
struct SkRect;
class SkRefCnt;
class SkRegion;
class SkStream;
class SkString;
class SkTypeface;
class SkWStream;
class SkFlattenableReadBuffer {
public:
SkFlattenableReadBuffer();
virtual ~SkFlattenableReadBuffer();
bool isOrderedBinaryBuffer() { return NULL != getOrderedBinaryBuffer(); }
virtual SkOrderedReadBuffer* getOrderedBinaryBuffer() { return NULL; }
enum Flags {
kCrossProcess_Flag = 1 << 0,
kScalarIsFloat_Flag = 1 << 1,
kPtrIs64Bit_Flag = 1 << 2,
};
void setFlags(uint32_t flags) { fFlags = flags; }
uint32_t getFlags() const { return fFlags; }
bool isCrossProcess() const { return SkToBool(fFlags & kCrossProcess_Flag); }
bool isScalarFloat() const { return SkToBool(fFlags & kScalarIsFloat_Flag); }
bool isPtr64Bit() const { return SkToBool(fFlags & kPtrIs64Bit_Flag); }
// primitives
virtual bool readBool() = 0;
virtual SkColor readColor() = 0;
virtual SkFixed readFixed() = 0;
virtual int32_t readInt() = 0;
virtual SkScalar readScalar() = 0;
virtual uint32_t readUInt() = 0;
virtual int32_t read32() = 0;
// strings -- the caller is responsible for freeing the string contents
virtual char* readString() = 0;
virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding) = 0;
// common data structures
virtual SkFlattenable* readFlattenable() = 0;
virtual void readPoint(SkPoint* point) = 0;
virtual void readMatrix(SkMatrix* matrix) = 0;
virtual void readIRect(SkIRect* rect) = 0;
virtual void readRect(SkRect* rect) = 0;
virtual void readRegion(SkRegion* region) = 0;
virtual void readPath(SkPath* path) = 0;
// binary data and arrays
virtual uint32_t readByteArray(void* value) = 0;
virtual uint32_t readColorArray(SkColor* colors) = 0;
virtual uint32_t readIntArray(int32_t* values) = 0;
virtual uint32_t readPointArray(SkPoint* points) = 0;
virtual uint32_t readScalarArray(SkScalar* values) = 0;
/** This helper peeks into the buffer and reports back the length of the next array in
* the buffer but does not change the state of the buffer.
*/
virtual uint32_t getArrayCount() = 0;
// helper functions
virtual void* readFunctionPtr();
virtual void readPaint(SkPaint* paint);
virtual void readBitmap(SkBitmap* bitmap) = 0;
virtual SkTypeface* readTypeface() = 0;
// helper function for classes with const SkPoint members
SkPoint readPoint() {
SkPoint point;
this->readPoint(&point);
return point;
}
template <typename T> T* readFlattenableT() {
return static_cast<T*>(this->readFlattenable());
}
private:
uint32_t fFlags;
};
///////////////////////////////////////////////////////////////////////////////
class SkFlattenableWriteBuffer {
public:
SkFlattenableWriteBuffer();
virtual ~SkFlattenableWriteBuffer();
virtual bool isOrderedBinaryBuffer() { return false; }
virtual SkOrderedWriteBuffer* getOrderedBinaryBuffer() { sk_throw(); return NULL; }
// primitives
virtual void writeByteArray(const void* data, size_t size) = 0;
virtual void writeBool(bool value) = 0;
virtual void writeFixed(SkFixed value) = 0;
virtual void writeScalar(SkScalar value) = 0;
virtual void writeScalarArray(const SkScalar* value, uint32_t count) = 0;
virtual void writeInt(int32_t value) = 0;
virtual void writeIntArray(const int32_t* value, uint32_t count) = 0;
virtual void writeUInt(uint32_t value) = 0;
virtual void write32(int32_t value) = 0; // printf in hex
virtual void writeString(const char* value) = 0;
virtual void writeEncodedString(const void* value, size_t byteLength,
SkPaint::TextEncoding encoding) = 0;
// common data structures
virtual void writeFlattenable(SkFlattenable* flattenable) = 0;
virtual void writeColor(const SkColor& color) = 0;
virtual void writeColorArray(const SkColor* color, uint32_t count) = 0;
virtual void writePoint(const SkPoint& point) = 0;
virtual void writePointArray(const SkPoint* points, uint32_t count) = 0;
virtual void writeMatrix(const SkMatrix& matrix) = 0;
virtual void writeIRect(const SkIRect& rect) = 0;
virtual void writeRect(const SkRect& rect) = 0;
virtual void writeRegion(const SkRegion& region) = 0;
virtual void writePath(const SkPath& path) = 0;
virtual size_t writeStream(SkStream* stream, size_t length) = 0;
// helper functions
virtual void writeFunctionPtr(void* ptr);
virtual void writePaint(const SkPaint& paint);
virtual void writeBitmap(const SkBitmap& bitmap) = 0;
virtual void writeTypeface(SkTypeface* typeface) = 0;
virtual bool writeToStream(SkWStream*) = 0;
enum Flags {
kCrossProcess_Flag = 0x01,
};
uint32_t getFlags() const { return fFlags; }
void setFlags(uint32_t flags) { fFlags = flags; }
bool isCrossProcess() const {
return SkToBool(fFlags & kCrossProcess_Flag);
}
bool persistTypeface() const { return (fFlags & kCrossProcess_Flag) != 0; }
protected:
// A helper function so that each subclass does not have to be a friend of SkFlattenable
void flattenObject(SkFlattenable* obj, SkFlattenableWriteBuffer& buffer);
uint32_t fFlags;
};
#endif
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