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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapController_DEFINED
#define SkBitmapController_DEFINED
#include "SkBitmap.h"
#include "SkBitmapCache.h"
#include "SkFilterQuality.h"
#include "SkImage.h"
#include "SkMatrix.h"
class SkBitmapProvider {
public:
explicit SkBitmapProvider(const SkBitmap& bm) : fBitmap(bm) {}
explicit SkBitmapProvider(const SkImage* img) : fImage(SkSafeRef(img)) {}
SkBitmapProvider(const SkBitmapProvider& other)
: fBitmap(other.fBitmap)
, fImage(SkSafeRef(other.fImage.get()))
{}
int width() const;
int height() const;
uint32_t getID() const;
bool validForDrawing() const;
SkImageInfo info() const;
SkBitmapCacheDesc makeCacheDesc(int w, int h) const;
SkBitmapCacheDesc makeCacheDesc() const;
void notifyAddedToCache() const;
// Only call this if you're sure you need the bits, since it make be expensive
// ... cause a decode and cache, or gpu-readback
bool asBitmap(SkBitmap*) const;
private:
SkBitmap fBitmap;
SkAutoTUnref<const SkImage> fImage;
};
/**
* Handles request to scale, filter, and lock a bitmap to be rasterized.
*/
class SkBitmapController : ::SkNoncopyable {
public:
class State : ::SkNoncopyable {
public:
virtual ~State() {}
const SkPixmap& pixmap() const { return fPixmap; }
const SkMatrix& invMatrix() const { return fInvMatrix; }
SkFilterQuality quality() const { return fQuality; }
protected:
SkPixmap fPixmap;
SkMatrix fInvMatrix;
SkFilterQuality fQuality;
private:
friend class SkBitmapController;
};
virtual ~SkBitmapController() {}
State* requestBitmap(const SkBitmapProvider&, const SkMatrix& inverse, SkFilterQuality,
void* storage, size_t storageSize);
State* requestBitmap(const SkBitmapProvider& bp, const SkMatrix& inv, SkFilterQuality quality) {
return this->requestBitmap(bp, inv, quality, nullptr, 0);
}
protected:
virtual State* onRequestBitmap(const SkBitmapProvider&, const SkMatrix& inv, SkFilterQuality,
void* storage, size_t storageSize) = 0;
};
///////////////////////////////////////////////////////////////////////////////////////////////////
class SkDefaultBitmapController : public SkBitmapController {
public:
SkDefaultBitmapController() {}
protected:
State* onRequestBitmap(const SkBitmapProvider&, const SkMatrix& inverse, SkFilterQuality,
void* storage, size_t storageSize) override;
};
#endif
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