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/*
* 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*) SK_OVERRIDE;
virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) 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) {
if (!fBitmap.pixelRef()) {
if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),
&fBitmap)) {
return;
}
}
canvas->drawBitmap(fBitmap, x, y, paint);
}
void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src,
const SkRect& dst, const SkPaint* paint) {
if (!fBitmap.pixelRef()) {
if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),
&fBitmap)) {
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,
SkBitmap::kNo_Config,
SkImageDecoder::kDecodeBounds_Mode)) {
return NULL;
}
return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height()));
}
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