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 "SkImageDecoder.h" 9#include "SkImage_Base.h" 10#include "SkBitmap.h" 11#include "SkCanvas.h" 12#include "SkData.h" 13 14class SkImage_Codec : public SkImage_Base { 15public: 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 virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) SK_OVERRIDE; 23 24private: 25 SkData* fEncodedData; 26 SkBitmap fBitmap; 27 28 typedef SkImage_Base INHERITED; 29}; 30 31/////////////////////////////////////////////////////////////////////////////// 32 33SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(width, height) { 34 fEncodedData = data; 35 fEncodedData->ref(); 36} 37 38SkImage_Codec::~SkImage_Codec() { 39 fEncodedData->unref(); 40} 41 42void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) { 43 if (!fBitmap.pixelRef()) { 44 if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(), &fBitmap)) { 45 return; 46 } 47 } 48 canvas->drawBitmap(fBitmap, x, y, paint); 49} 50 51void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, 52 const SkRect& dst, const SkPaint* paint) { 53 if (!fBitmap.pixelRef()) { 54 if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(), &fBitmap)) { 55 return; 56 } 57 } 58 canvas->drawBitmapRectToRect(fBitmap, src, dst, paint); 59} 60 61/////////////////////////////////////////////////////////////////////////////// 62 63SkImage* SkImage::NewEncodedData(SkData* data) { 64 if (NULL == data) { 65 return NULL; 66 } 67 68 SkBitmap bitmap; 69 if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap, kUnknown_SkColorType, 70 SkImageDecoder::kDecodeBounds_Mode)) { 71 return NULL; 72 } 73 74 return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height())); 75} 76