blob: 0b14216a064d9c6d81670f418b25692b58a9c8bf [file] [log] [blame]
/*
* 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();
}