/* * 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 GrTextureMaker_DEFINED #define GrTextureMaker_DEFINED #include "GrTextureProducer.h" /** * Base class for sources that start out as something other than a texture (encoded image, * picture, ...). */ class GrTextureMaker : public GrTextureProducer { public: enum class AllowedTexGenType : bool { kCheap, kAny }; /** * Returns a texture that is safe for use with the params. If the size of the returned texture * does not match width()/height() then the contents of the original must be scaled to fit * the texture. Additionally, the 'scaleAdjust' must be applied to the texture matrix * in order to correct the absolute texture coordinates. * Places the color space of the texture in (*texColorSpace). */ sk_sp<GrTextureProxy> refTextureProxyForParams(const GrSamplerState&, SkColorSpace* dstColorSpace, sk_sp<SkColorSpace>* texColorSpace, SkScalar scaleAdjust[2]); std::unique_ptr<GrFragmentProcessor> createFragmentProcessor( const SkMatrix& textureMatrix, const SkRect& constraintRect, FilterConstraint filterConstraint, bool coordsLimitedToConstraintRect, const GrSamplerState::Filter* filterOrNullForBicubic, SkColorSpace* dstColorSpace) override; protected: GrTextureMaker(GrContext* context, int width, int height, bool isAlphaOnly) : INHERITED(width, height, isAlphaOnly) , fContext(context) {} /** * Return the maker's "original" texture. It is the responsibility of the maker to handle any * caching of the original if desired. * If "genType" argument equals AllowedTexGenType::kCheap and the texture is not trivial to * construct then refOriginalTextureProxy should return nullptr (for example if texture is made * by drawing into a render target). */ virtual sk_sp<GrTextureProxy> refOriginalTextureProxy(bool willBeMipped, SkColorSpace* dstColorSpace, AllowedTexGenType genType) = 0; /** * Returns the color space of the maker's "original" texture, assuming it was retrieved with * the same destination color space. */ virtual sk_sp<SkColorSpace> getColorSpace(SkColorSpace* dstColorSpace) = 0; /** * Return a new (uncached) texture that is the stretch of the maker's original. * * The base-class handles general logic for this, and only needs access to the following * method: * - refOriginalTextureProxy() * * Subclass may override this if they can handle creating the texture more directly than * by copying. */ virtual sk_sp<GrTextureProxy> generateTextureProxyForParams(const CopyParams&, bool willBeMipped, SkColorSpace* dstColorSpace); GrContext* context() const { return fContext; } private: GrContext* fContext; typedef GrTextureProducer INHERITED; }; #endif