1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPixelSerializer_DEFINED 9 #define SkPixelSerializer_DEFINED 10 11 #include "SkData.h" 12 #include "SkPixmap.h" 13 #include "SkRefCnt.h" 14 15 /** 16 * Interface for serializing pixels, e.g. SkBitmaps in an SkPicture. 17 */ 18 class SkPixelSerializer : public SkRefCnt { 19 public: 20 virtual ~SkPixelSerializer() {} 21 22 /** 23 * Call to determine if the client wants to serialize the encoded data. If 24 * false, serialize another version (e.g. the result of encodePixels). 25 */ 26 bool useEncodedData(const void* data, size_t len) { 27 return this->onUseEncodedData(data, len); 28 } 29 30 /** 31 * Call to get the client's version of encoding these pixels. If it 32 * returns NULL, serialize the raw pixels. 33 */ 34 sk_sp<SkData> encodeToData(const SkPixmap& pixmap) { 35 return sk_sp<SkData>(this->onEncode(pixmap)); 36 } 37 38 protected: 39 /** 40 * Return true if you want to serialize the encoded data, false if you want 41 * another version serialized (e.g. the result of this->encode()). 42 */ 43 virtual bool onUseEncodedData(const void* data, size_t len) = 0; 44 45 /** 46 * If you want to encode these pixels, return the encoded data as an SkData 47 * Return null if you want to serialize the raw pixels. 48 */ 49 virtual SkData* onEncode(const SkPixmap&) = 0; 50 }; 51 #endif // SkPixelSerializer_DEFINED 52
