add pipecanvas

include/core/SkWriteBuffer.h

 
 /*
  * 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 SkWriteBuffer_DEFINED
 #define SkWriteBuffer_DEFINED
 
 #include "SkData.h"
 #include "SkImage.h"
 #include "SkPath.h"
 #include "SkPicture.h"
 #include "SkPixelSerializer.h"
 #include "SkRefCnt.h"
 #include "SkWriter32.h"
 #include "../private/SkTHash.h"
 
 class SkBitmap;
+class SkDeduper;
 class SkFactorySet;
 class SkFlattenable;
 class SkRefCntSet;
 
 class SkWriteBuffer {
 public:
     SkWriteBuffer() {}
     virtual ~SkWriteBuffer() {}
 
     virtual bool isCrossProcess() const = 0;
 
+    virtual void write(const void*, size_t) { sk_throw(); }

[mtklein, 2016/08/04 12:50:37]

The other implementation of SkWriteBuffer isn't writing bytes, so I don't think
it'll ever be able to be implemented.

Why don't we just keep it non-virtual on SkBinaryWriteBuffer?

[reed1, 2016/08/04 13:18:41]

Makes sense. I hadn't internalized that I was going to require that my writer be
a subclass of BinaryWriter, but of course it will be.

+
     virtual void writeByteArray(const void* data, size_t size) = 0;
     void writeDataAsByteArray(SkData* data) {
         this->writeByteArray(data->data(), data->size());
     }
     virtual void writeBool(bool 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;
@@ skipping 10 matching lines @@
     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;
     virtual void writeBitmap(const SkBitmap& bitmap) = 0;
     virtual void writeImage(const SkImage*) = 0;
     virtual void writeTypeface(SkTypeface* typeface) = 0;
     virtual void writePaint(const SkPaint& paint) = 0;
+
+    void setDedupers(SkDeduper* images, SkDeduper* typefaces) {

[mtklein, 2016/08/04 12:50:37]

We can probably just put these on SkBinaryWriteBuffer too?

+        fImageDeduper = images;
+        fTypefaceDeduper = typefaces;
+    }
+
+protected:
+    bool newWriteImage(const SkImage*);
+    bool newWriteTypeface(SkTypeface*);
+
+    SkDeduper*  fImageDeduper = nullptr;
+    SkDeduper*  fTypefaceDeduper = nullptr;
 };
 
 /**
  * Concrete implementation that serializes to a flat binary blob.
  */
-class SkBinaryWriteBuffer final : public SkWriteBuffer {
+class SkBinaryWriteBuffer : public SkWriteBuffer {
 public:
     enum Flags {
         kCrossProcess_Flag = 1 << 0,
     };
 
     SkBinaryWriteBuffer(uint32_t flags = 0);
     SkBinaryWriteBuffer(void* initialStorage, size_t storageSize, uint32_t flags = 0);
     ~SkBinaryWriteBuffer();
 
     bool isCrossProcess() const override {
         return SkToBool(fFlags & kCrossProcess_Flag);
     }
 
+    void write(const void* buffer, size_t bytes) override {
+        fWriter.write(buffer, bytes);
+    }
+
     void reset(void* storage = NULL, size_t storageSize = 0) {
         fWriter.reset(storage, storageSize);
     }
 
     size_t bytesWritten() const { return fWriter.bytesWritten(); }
 
     void writeByteArray(const void* data, size_t size) override;
     void writeBool(bool value) override;
     void writeScalar(SkScalar value) override;
     void writeScalarArray(const SkScalar* value, uint32_t count) override;
@@ skipping 42 matching lines @@
 
     SkRefCntSet* fTFSet;
 
     SkAutoTUnref<SkPixelSerializer> fPixelSerializer;
 
     // Only used if we do not have an fFactorySet
     SkTHashMap<SkString, uint32_t> fFlattenableDict;
 };
 
 #endif // SkWriteBuffer_DEFINED