1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef GrTextureAdjuster_DEFINED 9 #define GrTextureAdjuster_DEFINED 10 11 #include "GrTextureProducer.h" 12 #include "GrTextureProxy.h" 13 #include "SkTLazy.h" 14 15 /** 16 * Base class for sources that start out as textures. Optionally allows for a content area subrect. 17 * The intent is not to use content area for subrect rendering. Rather, the pixels outside the 18 * content area have undefined values and shouldn't be read *regardless* of filtering mode or 19 * the SkCanvas::SrcRectConstraint used for subrect draws. 20 */ 21 class GrTextureAdjuster : public GrTextureProducer { 22 public: 23 std::unique_ptr<GrFragmentProcessor> createFragmentProcessor( 24 const SkMatrix& textureMatrix, 25 const SkRect& constraintRect, 26 FilterConstraint, 27 bool coordsLimitedToConstraintRect, 28 const GrSamplerState::Filter* filterOrNullForBicubic, 29 SkColorSpace* dstColorSpace) override; 30 31 // We do not ref the texture nor the colorspace, so the caller must keep them in scope while 32 // this Adjuster is alive. 33 GrTextureAdjuster(GrContext*, sk_sp<GrTextureProxy>, SkAlphaType, uint32_t uniqueID, 34 SkColorSpace*); 35 36 protected: alphaType()37 SkAlphaType alphaType() const override { return fAlphaType; } 38 void makeCopyKey(const CopyParams& params, GrUniqueKey* copyKey, 39 SkColorSpace* dstColorSpace) override; 40 void didCacheCopy(const GrUniqueKey& copyKey) override; 41 originalProxy()42 GrTextureProxy* originalProxy() const { return fOriginal.get(); } originalProxyRef()43 sk_sp<GrTextureProxy> originalProxyRef() const { return fOriginal; } 44 45 private: 46 sk_sp<GrTextureProxy> onRefTextureProxyForParams(const GrSamplerState&, 47 SkColorSpace* dstColorSpace, 48 sk_sp<SkColorSpace>* proxyColorSpace, 49 SkScalar scaleAdjust[2]) override; 50 51 sk_sp<GrTextureProxy> refTextureProxyCopy(const CopyParams& copyParams, bool willBeMipped); 52 53 GrContext* fContext; 54 sk_sp<GrTextureProxy> fOriginal; 55 SkAlphaType fAlphaType; 56 SkColorSpace* fColorSpace; 57 uint32_t fUniqueID; 58 59 typedef GrTextureProducer INHERITED; 60 }; 61 62 #endif 63