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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 #ifndef SkOrderedWriteBuffer_DEFINED
     10 #define SkOrderedWriteBuffer_DEFINED
     11 
     12 #include "SkFlattenableBuffers.h"
     13 
     14 #include "SkRefCnt.h"
     15 #include "SkBitmapHeap.h"
     16 #include "SkPath.h"
     17 #include "SkSerializationHelpers.h"
     18 #include "SkWriter32.h"
     19 
     20 class SkBitmap;
     21 class SkFlattenable;
     22 class SkFactorySet;
     23 class SkNamedFactorySet;
     24 class SkRefCntSet;
     25 
     26 class SkOrderedWriteBuffer : public SkFlattenableWriteBuffer {
     27 public:
     28     SkOrderedWriteBuffer(size_t minSize);
     29     SkOrderedWriteBuffer(size_t minSize, void* initialStorage,
     30                          size_t storageSize);
     31     virtual ~SkOrderedWriteBuffer();
     32 
     33     virtual bool isOrderedBinaryBuffer() SK_OVERRIDE { return true; }
     34     virtual SkOrderedWriteBuffer* getOrderedBinaryBuffer() SK_OVERRIDE { return this; }
     35 
     36     SkWriter32* getWriter32() { return &fWriter; }
     37 
     38     void writeToMemory(void* dst) { fWriter.flatten(dst); }
     39     uint32_t* reserve(size_t size) { return fWriter.reserve(size); }
     40     uint32_t size() { return fWriter.size(); }
     41 
     42     virtual void writeByteArray(const void* data, size_t size) SK_OVERRIDE;
     43     virtual void writeBool(bool value) SK_OVERRIDE;
     44     virtual void writeFixed(SkFixed value) SK_OVERRIDE;
     45     virtual void writeScalar(SkScalar value) SK_OVERRIDE;
     46     virtual void writeScalarArray(const SkScalar* value, uint32_t count) SK_OVERRIDE;
     47     virtual void writeInt(int32_t value) SK_OVERRIDE;
     48     virtual void writeIntArray(const int32_t* value, uint32_t count) SK_OVERRIDE;
     49     virtual void writeUInt(uint32_t value) SK_OVERRIDE;
     50     virtual void write32(int32_t value) SK_OVERRIDE;
     51     virtual void writeString(const char* value) SK_OVERRIDE;
     52     virtual void writeEncodedString(const void* value, size_t byteLength,
     53                                     SkPaint::TextEncoding encoding) SK_OVERRIDE;
     54 
     55     virtual void writeFlattenable(SkFlattenable* flattenable) SK_OVERRIDE;
     56     virtual void writeColor(const SkColor& color) SK_OVERRIDE;
     57     virtual void writeColorArray(const SkColor* color, uint32_t count) SK_OVERRIDE;
     58     virtual void writePoint(const SkPoint& point) SK_OVERRIDE;
     59     virtual void writePointArray(const SkPoint* point, uint32_t count) SK_OVERRIDE;
     60     virtual void writeMatrix(const SkMatrix& matrix) SK_OVERRIDE;
     61     virtual void writeIRect(const SkIRect& rect)SK_OVERRIDE;
     62     virtual void writeRect(const SkRect& rect) SK_OVERRIDE;
     63     virtual void writeRegion(const SkRegion& region) SK_OVERRIDE;
     64     virtual void writePath(const SkPath& path) SK_OVERRIDE;
     65     virtual size_t writeStream(SkStream* stream, size_t length) SK_OVERRIDE;
     66 
     67     virtual void writeBitmap(const SkBitmap& bitmap) SK_OVERRIDE;
     68     virtual void writeTypeface(SkTypeface* typeface) SK_OVERRIDE;
     69 
     70     virtual bool writeToStream(SkWStream*) SK_OVERRIDE;
     71 
     72     SkFactorySet* setFactoryRecorder(SkFactorySet*);
     73     SkNamedFactorySet* setNamedFactoryRecorder(SkNamedFactorySet*);
     74 
     75     SkRefCntSet* getTypefaceRecorder() const { return fTFSet; }
     76     SkRefCntSet* setTypefaceRecorder(SkRefCntSet*);
     77 
     78     /**
     79      * Set an SkBitmapHeap to store bitmaps rather than flattening.
     80      *
     81      * Incompatible with an EncodeBitmap function. If an EncodeBitmap function is set, setting an
     82      * SkBitmapHeap will set the function to NULL in release mode and crash in debug.
     83      */
     84     void setBitmapHeap(SkBitmapHeap*);
     85 
     86     /**
     87      * Provide a function to encode an SkBitmap to an SkStream. writeBitmap will attempt to use
     88      * bitmapEncoder to store the SkBitmap. If the reader does not provide a function to decode, it
     89      * will not be able to restore SkBitmaps, but will still be able to read the rest of the stream.
     90      *
     91      * Incompatible with the SkBitmapHeap. If an encoder is set fBitmapHeap will be set to NULL in
     92      * release and crash in debug.
     93      */
     94     void setBitmapEncoder(SkSerializationHelpers::EncodeBitmap);
     95 
     96 private:
     97     SkFactorySet* fFactorySet;
     98     SkNamedFactorySet* fNamedFactorySet;
     99     SkWriter32 fWriter;
    100 
    101     SkBitmapHeap* fBitmapHeap;
    102     SkRefCntSet* fTFSet;
    103 
    104     SkSerializationHelpers::EncodeBitmap fBitmapEncoder;
    105 
    106     typedef SkFlattenableWriteBuffer INHERITED;
    107 };
    108 
    109 #endif // SkOrderedWriteBuffer_DEFINED
    110