/*
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* Copyright 2016 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 GrTextureMaker_DEFINED
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#define GrTextureMaker_DEFINED
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#include "GrTextureProducer.h"
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/**
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* Base class for sources that start out as something other than a texture (encoded image,
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* picture, ...).
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*/
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class GrTextureMaker : public GrTextureProducer {
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public:
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enum class AllowedTexGenType : bool { kCheap, kAny };
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std::unique_ptr<GrFragmentProcessor> createFragmentProcessor(
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const SkMatrix& textureMatrix,
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const SkRect& constraintRect,
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FilterConstraint filterConstraint,
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bool coordsLimitedToConstraintRect,
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const GrSamplerState::Filter* filterOrNullForBicubic) override;
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protected:
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GrTextureMaker(GrContext* context, int width, int height, bool isAlphaOnly)
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: INHERITED(context, width, height, isAlphaOnly) {}
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/**
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* Return the maker's "original" texture. It is the responsibility of the maker to handle any
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* caching of the original if desired.
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* If "genType" argument equals AllowedTexGenType::kCheap and the texture is not trivial to
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* construct then refOriginalTextureProxy should return nullptr (for example if texture is made
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* by drawing into a render target).
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*/
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virtual sk_sp<GrTextureProxy> refOriginalTextureProxy(bool willBeMipped,
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AllowedTexGenType genType) = 0;
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GrContext* context() const { return fContext; }
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private:
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sk_sp<GrTextureProxy> onRefTextureProxyForParams(const GrSamplerState&,
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bool willBeMipped,
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SkScalar scaleAdjust[2]) override;
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typedef GrTextureProducer INHERITED;
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};
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#endif
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