| /* |
| * 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 "SkImageDecoder.h" |
| #include "SkImage_Base.h" |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkData.h" |
| |
| class SkImage_Codec : public SkImage_Base { |
| public: |
| static SkImage* NewEmpty(); |
| |
| SkImage_Codec(SkData* encodedData, int width, int height); |
| virtual ~SkImage_Codec(); |
| |
| virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) const SK_OVERRIDE; |
| virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, |
| const SkPaint*) const SK_OVERRIDE; |
| |
| virtual bool isOpaque() const SK_OVERRIDE; |
| |
| private: |
| SkData* fEncodedData; |
| SkBitmap fBitmap; |
| |
| typedef SkImage_Base INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(width, height) { |
| fEncodedData = data; |
| fEncodedData->ref(); |
| } |
| |
| SkImage_Codec::~SkImage_Codec() { |
| fEncodedData->unref(); |
| } |
| |
| void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const { |
| if (!fBitmap.pixelRef()) { |
| // todo: this needs to be thread-safe |
| SkBitmap* bitmap = const_cast<SkBitmap*>(&fBitmap); |
| if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(), bitmap)) { |
| return; |
| } |
| } |
| canvas->drawBitmap(fBitmap, x, y, paint); |
| } |
| |
| void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst, |
| const SkPaint* paint) const { |
| if (!fBitmap.pixelRef()) { |
| // todo: this needs to be thread-safe |
| SkBitmap* bitmap = const_cast<SkBitmap*>(&fBitmap); |
| if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(), bitmap)) { |
| return; |
| } |
| } |
| canvas->drawBitmapRectToRect(fBitmap, src, dst, paint); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkImage* SkImage::NewEncodedData(SkData* data) { |
| if (NULL == data) { |
| return NULL; |
| } |
| |
| SkBitmap bitmap; |
| if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap, kUnknown_SkColorType, |
| SkImageDecoder::kDecodeBounds_Mode)) { |
| return NULL; |
| } |
| |
| return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height())); |
| } |
| |
| |
| bool SkImage_Codec::isOpaque() const { |
| return fBitmap.isOpaque(); |
| } |