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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SkFlattenable_DEFINED
#define SkFlattenable_DEFINED
#include "SkRefCnt.h"
#include "SkBitmap.h"
#include "SkReader32.h"
#include "SkTDArray.h"
#include "SkWriter32.h"
class SkFlattenableReadBuffer;
class SkFlattenableWriteBuffer;
class SkString;
/** \class SkFlattenable
SkFlattenable is the base class for objects that need to be flattened
into a data stream for either transport or as part of the key to the
font cache.
*/
class SK_API SkFlattenable : public SkRefCnt {
public:
typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&);
SkFlattenable() {}
/** Implement this to return a factory function pointer that can be called
to recreate your class given a buffer (previously written to by your
override of flatten().
*/
virtual Factory getFactory() = 0;
/** Override this to write data specific to your subclass into the buffer,
being sure to call your super-class' version first. This data will later
be passed to your Factory function, returned by getFactory().
*/
virtual void flatten(SkFlattenableWriteBuffer&);
/** Set the string to describe the sublass and return true. If this is not
overridden, ignore the string param and return false.
*/
virtual bool toDumpString(SkString*) const;
static Factory NameToFactory(const char name[]);
static const char* FactoryToName(Factory);
static void Register(const char name[], Factory);
class Registrar {
public:
Registrar(const char name[], Factory factory) {
SkFlattenable::Register(name, factory);
}
};
protected:
SkFlattenable(SkFlattenableReadBuffer&) {}
};
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
class SkTypeface;
class SkFlattenableReadBuffer : public SkReader32 {
public:
SkFlattenableReadBuffer();
explicit SkFlattenableReadBuffer(const void* data);
SkFlattenableReadBuffer(const void* data, size_t size);
void setRefCntArray(SkRefCnt* array[], int count) {
fRCArray = array;
fRCCount = count;
}
void setTypefaceArray(SkTypeface* array[], int count) {
fTFArray = array;
fTFCount = count;
}
void setFactoryPlayback(SkFlattenable::Factory array[], int count) {
fFactoryArray = array;
fFactoryCount = count;
}
SkTypeface* readTypeface();
SkRefCnt* readRefCnt();
void* readFunctionPtr();
SkFlattenable* readFlattenable();
private:
SkRefCnt** fRCArray;
int fRCCount;
SkTypeface** fTFArray;
int fTFCount;
SkFlattenable::Factory* fFactoryArray;
int fFactoryCount;
typedef SkReader32 INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
#include "SkPtrRecorder.h"
class SkRefCntRecorder : public SkPtrRecorder {
public:
virtual ~SkRefCntRecorder();
/** Add a refcnt object to the set and ref it if not already present,
or if it is already present, do nothing. Either way, returns 0 if obj
is null, or a base-1 index if obj is not null.
*/
uint32_t record(SkRefCnt* ref) {
return this->recordPtr(ref);
}
// This does not change the owner counts on the objects
void get(SkRefCnt* array[]) const {
this->getPtrs((void**)array);
}
protected:
// overrides
virtual void incPtr(void*);
virtual void decPtr(void*);
private:
typedef SkPtrRecorder INHERITED;
};
class SkFactoryRecorder : public SkPtrRecorder {
public:
/** Add a factory to the set. If it is null return 0, otherwise return a
base-1 index for the factory.
*/
uint32_t record(SkFlattenable::Factory fact) {
return this->recordPtr((void*)fact);
}
void get(SkFlattenable::Factory array[]) const {
this->getPtrs((void**)array);
}
private:
typedef SkPtrRecorder INHERITED;
};
class SkFlattenableWriteBuffer : public SkWriter32 {
public:
SkFlattenableWriteBuffer(size_t minSize);
virtual ~SkFlattenableWriteBuffer();
void writeTypeface(SkTypeface*);
void writeRefCnt(SkRefCnt*);
void writeFunctionPtr(void*);
void writeFlattenable(SkFlattenable* flattenable);
SkRefCntRecorder* getTypefaceRecorder() const { return fTFRecorder; }
SkRefCntRecorder* setTypefaceRecorder(SkRefCntRecorder*);
SkRefCntRecorder* getRefCntRecorder() const { return fRCRecorder; }
SkRefCntRecorder* setRefCntRecorder(SkRefCntRecorder*);
SkFactoryRecorder* getFactoryRecorder() const { return fFactoryRecorder; }
SkFactoryRecorder* setFactoryRecorder(SkFactoryRecorder*);
enum Flags {
kCrossProcess_Flag = 0x01
};
Flags getFlags() const { return fFlags; }
void setFlags(Flags flags) { fFlags = flags; }
bool isCrossProcess() const { return (fFlags & kCrossProcess_Flag) != 0; }
bool persistBitmapPixels() const {
return (fFlags & kCrossProcess_Flag) != 0;
}
bool persistTypeface() const { return (fFlags & kCrossProcess_Flag) != 0; }
private:
Flags fFlags;
SkRefCntRecorder* fTFRecorder;
SkRefCntRecorder* fRCRecorder;
SkFactoryRecorder* fFactoryRecorder;
typedef SkWriter32 INHERITED;
};
#endif
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