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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkColorSpaceXformer_DEFINED
#define SkColorSpaceXformer_DEFINED
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkRefCnt.h"
#include "SkTHash.h"
class SkBitmap;
class SkColorFilter;
class SkColorSpace;
class SkColorSpaceXform;
class SkImage;
class SkImageFilter;
class SkPaint;
class SkShader;
class SkColorSpaceXformer : public SkNoncopyable {
public:
static std::unique_ptr<SkColorSpaceXformer> Make(sk_sp<SkColorSpace> dst);
~SkColorSpaceXformer();
sk_sp<SkImage> apply(const SkImage*);
sk_sp<SkImage> apply(const SkBitmap&);
sk_sp<SkColorFilter> apply(const SkColorFilter*);
sk_sp<SkImageFilter> apply(const SkImageFilter*);
sk_sp<SkShader> apply(const SkShader*);
SkPaint apply(const SkPaint&);
void apply(SkColor dst[], const SkColor src[], int n);
SkColor apply(SkColor srgb);
sk_sp<SkColorSpace> dst() const { return fDst; }
SkCanvas::Lattice apply(const SkCanvas::Lattice&, SkColor*, int);
private:
SkColorSpaceXformer(sk_sp<SkColorSpace> dst, std::unique_ptr<SkColorSpaceXform> fromSRGB);
template <typename T>
using Cache = SkTHashMap<sk_sp<T>, sk_sp<T>>;
template <typename T>
sk_sp<T> cachedApply(const T*, Cache<T>*, sk_sp<T> (*)(const T*, SkColorSpaceXformer*));
void purgeCaches();
class AutoCachePurge;
sk_sp<SkColorSpace> fDst;
std::unique_ptr<SkColorSpaceXform> fFromSRGB;
size_t fReentryCount; // tracks the number of nested apply() calls for cache purging.
Cache<SkImage > fImageCache;
Cache<SkColorFilter> fColorFilterCache;
Cache<SkImageFilter> fImageFilterCache;
};
#endif
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