add pipecanvas

src/core/SkWriteBuffer.cpp

Index: src/core/SkWriteBuffer.cpp
diff --git a/src/core/SkWriteBuffer.cpp b/src/core/SkWriteBuffer.cpp
index 33ac03b49de66e51d82fc1a0bb1a1a1c4c4c05b9..8572170ac3a8c9dbb5833d43bfe7d142a5ce1328 100644
--- a/src/core/SkWriteBuffer.cpp
+++ b/src/core/SkWriteBuffer.cpp
@@ -8,11 +8,30 @@
 #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)
@@ -173,6 +192,10 @@ void SkBinaryWriteBuffer::writeBitmap(const SkBitmap& bitmap) {
 }
 
 void SkBinaryWriteBuffer::writeImage(const SkImage* image) {
+    if (this->newWriteImage(image)) {
+        return;
+    }
+
     this->writeInt(image->width());
     this->writeInt(image->height());
 
@@ -193,6 +216,10 @@ void SkBinaryWriteBuffer::writeImage(const SkImage* image) {
 }
 
 void SkBinaryWriteBuffer::writeTypeface(SkTypeface* obj) {
+    if (this->newWriteTypeface(obj)) {
+        return;
+    }
+
     if (nullptr == obj || nullptr == fTFSet) {
         fWriter.write32(0);
     } else {