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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapKey_DEFINED
#define SkBitmapKey_DEFINED
#include "SkBitmap.h"
#include "SkImage.h"
#include "SkCanvas.h"
class SkBitmapKey {
public:
SkBitmapKey() : fSubset(SkIRect::MakeEmpty()), fID(0) {}
explicit SkBitmapKey(const SkBitmap& bm)
: fSubset(bm.getSubset()), fID(bm.getGenerationID()) {}
explicit SkBitmapKey(const SkImage* img)
: fSubset(img ? img->bounds() : SkIRect::MakeEmpty())
, fID(img ? img->uniqueID() : 0) {}
explicit SkBitmapKey(const sk_sp<SkImage> img)
: fSubset(img->bounds()), fID(img->uniqueID()) {}
bool operator==(const SkBitmapKey& rhs) const {
return fID == rhs.fID && fSubset == rhs.fSubset;
}
bool operator!=(const SkBitmapKey& rhs) const { return !(*this == rhs); }
private:
SkIRect fSubset;
uint32_t fID;
};
/**
This wraps a thing that could either be a bitmap or a image and
abstracts out some common tasks.
*/
class SkImageBitmap {
public:
explicit SkImageBitmap(const SkBitmap& b) : fBitmap(b), fImage(nullptr) {}
explicit SkImageBitmap(SkImage* i) : fImage(i) { SkASSERT(fImage); }
SkIRect bounds() const { return fImage ? fImage->bounds() : fBitmap.bounds(); }
SkISize dimensions() const {
return fImage ? fImage->dimensions() : fBitmap.dimensions();
}
sk_sp<SkImage> makeImage() const {
return fImage ? sk_ref_sp(fImage) : SkImage::MakeFromBitmap(fBitmap);
}
SkBitmapKey getKey() const {
return fImage ? SkBitmapKey(fImage) : SkBitmapKey(fBitmap);
}
void draw(SkCanvas* canvas, SkPaint* paint) const {
if (fImage) {
canvas->drawImage(fImage, 0, 0, paint);
} else {
canvas->drawBitmap(fBitmap, 0, 0, paint);
}
}
private:
SkBitmap fBitmap;
SkImage* fImage; // non-owning; when drawImage starts passing a sk_sp<>,
// we can take a const ref to that sk_sp<>.
};
#endif // SkBitmapKey_DEFINED
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