/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkColorSpaceXformer_DEFINED
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#define SkColorSpaceXformer_DEFINED
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#include "SkCanvas.h"
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#include "SkColor.h"
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#include "SkColorSpaceXformSteps.h"
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#include "SkRasterPipeline.h"
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#include "SkRefCnt.h"
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#include "SkTHash.h"
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class SkBitmap;
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class SkColorFilter;
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class SkColorSpace;
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class SkImage;
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class SkImageFilter;
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class SkPaint;
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class SkShader;
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class SkColorSpaceXformer : public SkNoncopyable {
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public:
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static std::unique_ptr<SkColorSpaceXformer> Make(sk_sp<SkColorSpace> dst);
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~SkColorSpaceXformer();
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sk_sp<SkImage> apply(const SkImage*);
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sk_sp<SkImage> apply(const SkBitmap&);
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sk_sp<SkColorFilter> apply(const SkColorFilter*);
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sk_sp<SkImageFilter> apply(const SkImageFilter*);
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sk_sp<SkShader> apply(const SkShader*);
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SkPaint apply(const SkPaint&);
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void apply(SkColor dst[], const SkColor src[], int n);
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SkColor apply(SkColor srgb);
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sk_sp<SkColorSpace> dst() const { return fDst; }
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SkCanvas::Lattice apply(const SkCanvas::Lattice&, SkColor*, int);
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private:
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explicit SkColorSpaceXformer(sk_sp<SkColorSpace> dst);
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template <typename T>
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using Cache = SkTHashMap<sk_sp<T>, sk_sp<T>>;
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template <typename T>
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sk_sp<T> cachedApply(const T*, Cache<T>*, sk_sp<T> (*)(const T*, SkColorSpaceXformer*));
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void purgeCaches();
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class AutoCachePurge;
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sk_sp<SkColorSpace> fDst;
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SkSTArenaAlloc<256> fAlloc;
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std::function<void(size_t, size_t, size_t, size_t)> fFromSRGB;
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SkColorSpaceXformSteps fFromSRGBSteps;
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SkRasterPipeline_MemoryCtx fFromSRGBSrc{nullptr,0};
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SkRasterPipeline_MemoryCtx fFromSRGBDst{nullptr,0};
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size_t fReentryCount; // tracks the number of nested apply() calls for cache purging.
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Cache<SkImage > fImageCache;
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Cache<SkColorFilter> fColorFilterCache;
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Cache<SkImageFilter> fImageFilterCache;
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};
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#endif
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