michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "SkImageDecoder.h"
michael@0: #include "SkImage_Base.h"
michael@0: #include "SkBitmap.h"
michael@0: #include "SkCanvas.h"
michael@0: #include "SkData.h"
michael@0: 
michael@0: class SkImage_Codec : public SkImage_Base {
michael@0: public:
michael@0:     static SkImage* NewEmpty();
michael@0: 
michael@0:     SkImage_Codec(SkData* encodedData, int width, int height);
michael@0:     virtual ~SkImage_Codec();
michael@0: 
michael@0:     virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;
michael@0:     virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     SkData*     fEncodedData;
michael@0:     SkBitmap    fBitmap;
michael@0: 
michael@0:     typedef SkImage_Base INHERITED;
michael@0: };
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(width, height) {
michael@0:     fEncodedData = data;
michael@0:     fEncodedData->ref();
michael@0: }
michael@0: 
michael@0: SkImage_Codec::~SkImage_Codec() {
michael@0:     fEncodedData->unref();
michael@0: }
michael@0: 
michael@0: void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) {
michael@0:     if (!fBitmap.pixelRef()) {
michael@0:         if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),
michael@0:                                           &fBitmap)) {
michael@0:             return;
michael@0:         }
michael@0:     }
michael@0:     canvas->drawBitmap(fBitmap, x, y, paint);
michael@0: }
michael@0: 
michael@0: void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src,
michael@0:                                      const SkRect& dst, const SkPaint* paint) {
michael@0:     if (!fBitmap.pixelRef()) {
michael@0:         if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),
michael@0:                                           &fBitmap)) {
michael@0:             return;
michael@0:         }
michael@0:     }
michael@0:     canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkImage* SkImage::NewEncodedData(SkData* data) {
michael@0:     if (NULL == data) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     SkBitmap bitmap;
michael@0:     if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap,
michael@0:                                       SkBitmap::kNo_Config,
michael@0:                                       SkImageDecoder::kDecodeBounds_Mode)) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height()));
michael@0: }