add pipecanvas

src/core/SkWriteBuffer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkWriteBuffer.h"
 #include "SkBitmap.h"
 #include "SkData.h"
+#include "SkDeduper.h"
 #include "SkPixelRef.h"
 #include "SkPtrRecorder.h"
 #include "SkStream.h"
 #include "SkTypeface.h"
 
+bool SkWriteBuffer::newWriteImage(const SkImage* image) {
+    if (fImageDeduper) {
+        this->write32(fImageDeduper->findOrDefine((void*)image));
+        return true;
+    }
+    return false;
+}
+
+bool SkWriteBuffer::newWriteTypeface(SkTypeface* typeface) {
+    if (fTypefaceDeduper) {
+        this->write32(fTypefaceDeduper->findOrDefine(typeface));
+        return true;
+    }
+    return false;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
 SkBinaryWriteBuffer::SkBinaryWriteBuffer(uint32_t flags)
     : fFlags(flags)
     , fFactorySet(nullptr)
     , fTFSet(nullptr) {
 }
 
 SkBinaryWriteBuffer::SkBinaryWriteBuffer(void* storage, size_t storageSize, uint32_t flags)
     : fFlags(flags)
     , fFactorySet(nullptr)
     , fWriter(storage, storageSize)
@@ skipping 140 matching lines @@
                 return;
             }
         }
     }
 
     this->writeUInt(0); // signal raw pixels
     SkBitmap::WriteRawPixels(this, bitmap);
 }
 
 void SkBinaryWriteBuffer::writeImage(const SkImage* image) {
+    if (this->newWriteImage(image)) {
+        return;
+    }
+
     this->writeInt(image->width());
     this->writeInt(image->height());
 
     sk_sp<SkData> encoded(image->encode(this->getPixelSerializer()));
     if (encoded && encoded->size() > 0) {
         write_encoded_bitmap(this, encoded.get(), SkIPoint::Make(0, 0));
         return;
     }
 
     SkBitmap bm;
     if (image->asLegacyBitmap(&bm, SkImage::kRO_LegacyBitmapMode)) {
         this->writeUInt(1);  // signal raw pixels.
         SkBitmap::WriteRawPixels(this, bm);
         return;
     }
 
     this->writeUInt(0); // signal no pixels (in place of the size of the encoded data)
 }
 
 void SkBinaryWriteBuffer::writeTypeface(SkTypeface* obj) {
+    if (this->newWriteTypeface(obj)) {
+        return;
+    }
+
     if (nullptr == obj || nullptr == fTFSet) {
         fWriter.write32(0);
     } else {
         fWriter.write32(fTFSet->add(obj));
     }
 }
 
 void SkBinaryWriteBuffer::writePaint(const SkPaint& paint) {
     paint.flatten(*this);
 }
@@ skipping 69 matching lines @@
     // make room for the size of the flattened object
     (void)fWriter.reserve(sizeof(uint32_t));
     // record the current size, so we can subtract after the object writes.
     size_t offset = fWriter.bytesWritten();
     // now flatten the object
     flattenable->flatten(*this);
     size_t objSize = fWriter.bytesWritten() - offset;
     // record the obj's size
     fWriter.overwriteTAt(offset - sizeof(uint32_t), SkToU32(objSize));
 }