1 /* 2 * Copyright 2012 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 #include "SkImage_Base.h" 9 #include "SkBitmap.h" 10 #include "SkCanvas.h" 11 #include "SkData.h" 12 #include "../images/SkImageDecoder.h" 13 14 class SkImage_Codec : public SkImage_Base { 15 public: 16 static SkImage* NewEmpty(); 17 18 SkImage_Codec(SkData* encodedData, int width, int height); 19 virtual ~SkImage_Codec(); 20 21 virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE; 22 23 private: 24 SkData* fEncodedData; 25 SkBitmap fBitmap; 26 27 typedef SkImage_Base INHERITED; 28 }; 29 30 /////////////////////////////////////////////////////////////////////////////// 31 32 SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(width, height) { 33 fEncodedData = data; 34 fEncodedData->ref(); 35 } 36 37 SkImage_Codec::~SkImage_Codec() { 38 fEncodedData->unref(); 39 } 40 41 void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) { 42 if (!fBitmap.pixelRef()) { 43 if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(), 44 &fBitmap)) { 45 return; 46 } 47 } 48 canvas->drawBitmap(fBitmap, x, y, paint); 49 } 50 51 /////////////////////////////////////////////////////////////////////////////// 52 53 SkImage* SkImage::NewEncodedData(SkData* data) { 54 if (NULL == data) { 55 return NULL; 56 } 57 58 SkBitmap bitmap; 59 if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap, 60 SkBitmap::kNo_Config, 61 SkImageDecoder::kDecodeBounds_Mode)) { 62 return NULL; 63 } 64 65 return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height())); 66 } 67
