/*
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* Copyright 2012 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 SkImage_Base_DEFINED
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#define SkImage_Base_DEFINED
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#include "SkImage.h"
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#include "SkSurface.h"
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#include <atomic>
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#if SK_SUPPORT_GPU
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#include "GrTextureProxy.h"
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#include "SkTDArray.h"
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class GrTexture;
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#endif
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#include <new>
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class GrSamplerState;
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class SkCachedData;
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struct SkYUVASizeInfo;
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enum {
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kNeedNewImageUniqueID = 0
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};
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class SkImage_Base : public SkImage {
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public:
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virtual ~SkImage_Base();
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// User: returns image info for this SkImage.
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// Implementors: if you can not return the value, return an invalid ImageInfo with w=0 & h=0
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// & unknown color space.
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virtual SkImageInfo onImageInfo() const = 0;
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virtual SkIRect onGetSubset() const {
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return { 0, 0, this->width(), this->height() };
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}
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virtual bool onPeekPixels(SkPixmap*) const { return false; }
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virtual const SkBitmap* onPeekBitmap() const { return nullptr; }
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virtual bool onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
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int srcX, int srcY, CachingHint) const = 0;
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virtual GrContext* context() const { return nullptr; }
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// TODO: remove this contextID and use GrContext_Base::matches
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virtual uint32_t contextID() const { return 0; }
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#if SK_SUPPORT_GPU
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virtual GrTextureProxy* peekProxy() const { return nullptr; }
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virtual sk_sp<GrTextureProxy> asTextureProxyRef() const { return nullptr; }
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virtual sk_sp<GrTextureProxy> asTextureProxyRef(GrContext*, const GrSamplerState&,
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SkScalar scaleAdjust[2]) const = 0;
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virtual sk_sp<GrTextureProxy> refPinnedTextureProxy(uint32_t* uniqueID) const {
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return nullptr;
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}
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virtual bool isYUVA() const { return false; }
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virtual bool asYUVATextureProxiesRef(sk_sp<GrTextureProxy>[4], SkYUVAIndex[4],
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SkYUVColorSpace*) const { return false; }
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virtual GrTexture* onGetTexture() const { return nullptr; }
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#endif
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virtual GrBackendTexture onGetBackendTexture(bool flushPendingGrContextIO,
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GrSurfaceOrigin* origin) const;
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// return a read-only copy of the pixels. We promise to not modify them,
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// but only inspect them (or encode them).
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virtual bool getROPixels(SkBitmap*, CachingHint = kAllow_CachingHint) const = 0;
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virtual sk_sp<SkImage> onMakeSubset(const SkIRect&) const = 0;
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virtual sk_sp<SkCachedData> getPlanes(SkYUVASizeInfo*, SkYUVAIndex[4],
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SkYUVColorSpace*, const void* planes[4]);
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virtual sk_sp<SkData> onRefEncoded() const { return nullptr; }
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virtual bool onAsLegacyBitmap(SkBitmap*) const;
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// True for picture-backed and codec-backed
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virtual bool onIsLazyGenerated() const { return false; }
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// True for images instantiated in GPU memory
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virtual bool onIsTextureBacked() const { return false; }
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// Call when this image is part of the key to a resourcecache entry. This allows the cache
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// to know automatically those entries can be purged when this SkImage deleted.
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virtual void notifyAddedToRasterCache() const {
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fAddedToRasterCache.store(true);
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}
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virtual bool onIsValid(GrContext*) const = 0;
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virtual bool onPinAsTexture(GrContext*) const { return false; }
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virtual void onUnpinAsTexture(GrContext*) const {}
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virtual sk_sp<SkImage> onMakeColorTypeAndColorSpace(SkColorType, sk_sp<SkColorSpace>) const = 0;
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protected:
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SkImage_Base(int width, int height, uint32_t uniqueID);
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private:
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// Set true by caches when they cache content that's derived from the current pixels.
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mutable std::atomic<bool> fAddedToRasterCache;
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typedef SkImage INHERITED;
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};
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static inline SkImage_Base* as_IB(SkImage* image) {
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return static_cast<SkImage_Base*>(image);
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}
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static inline SkImage_Base* as_IB(const sk_sp<SkImage>& image) {
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return static_cast<SkImage_Base*>(image.get());
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}
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static inline const SkImage_Base* as_IB(const SkImage* image) {
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return static_cast<const SkImage_Base*>(image);
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}
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#endif
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