| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrTextureAdjuster_DEFINED |
| #define GrTextureAdjuster_DEFINED |
| |
| #include "GrTextureProducer.h" |
| #include "GrTextureProxy.h" |
| #include "SkTLazy.h" |
| |
| /** |
| * Base class for sources that start out as textures. Optionally allows for a content area subrect. |
| * The intent is not to use content area for subrect rendering. Rather, the pixels outside the |
| * content area have undefined values and shouldn't be read *regardless* of filtering mode or |
| * the SkCanvas::SrcRectConstraint used for subrect draws. |
| */ |
| class GrTextureAdjuster : public GrTextureProducer { |
| public: |
| /** Makes the subset of the texture safe to use with the given texture parameters. |
| outOffset will be the top-left corner of the subset if a copy is not made. Otherwise, |
| the copy will be tight to the contents and outOffset will be (0, 0). If the copy's size |
| does not match subset's dimensions then the contents are scaled to fit the copy.*/ |
| sk_sp<GrTextureProxy> refTextureProxySafeForParams(const GrSamplerParams&, SkIPoint* outOffset, |
| SkScalar scaleAdjust[2]); |
| |
| sk_sp<GrFragmentProcessor> createFragmentProcessor( |
| const SkMatrix& textureMatrix, |
| const SkRect& constraintRect, |
| FilterConstraint, |
| bool coordsLimitedToConstraintRect, |
| const GrSamplerParams::FilterMode* filterOrNullForBicubic, |
| SkColorSpace* dstColorSpace) override; |
| |
| // We do not ref the texture nor the colorspace, so the caller must keep them in scope while |
| // this Adjuster is alive. |
| GrTextureAdjuster(GrContext*, sk_sp<GrTextureProxy>, SkAlphaType, const SkIRect& area, |
| uint32_t uniqueID, SkColorSpace*); |
| |
| protected: |
| SkAlphaType alphaType() const override { return fAlphaType; } |
| void makeCopyKey(const CopyParams& params, GrUniqueKey* copyKey, |
| SkColorSpace* dstColorSpace) override; |
| void didCacheCopy(const GrUniqueKey& copyKey) override; |
| |
| GrTextureProxy* originalProxy() const { return fOriginal.get(); } |
| sk_sp<GrTextureProxy> originalProxyRef() const { return fOriginal; } |
| |
| /** Returns the content area or null for the whole original texture */ |
| const SkIRect* contentAreaOrNull() { return fContentArea.getMaybeNull(); } |
| |
| private: |
| SkTLazy<SkIRect> fContentArea; |
| GrContext* fContext; |
| sk_sp<GrTextureProxy> fOriginal; |
| SkAlphaType fAlphaType; |
| SkColorSpace* fColorSpace; |
| uint32_t fUniqueID; |
| |
| sk_sp<GrTextureProxy> refTextureProxyCopy(const CopyParams ©Params); |
| |
| typedef GrTextureProducer INHERITED; |
| }; |
| |
| #endif |