3c5cfb0d15
Ran:
find src include \( -name '*.cpp' -o -name '*.h' \) -executable -exec chmod -x {} \;
BUG=skia:
Change-Id: I04a4adbfcea9fd9860ab83d43734dc5158d3a884
Reviewed-on: https://skia-review.googlesource.com/8220
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/*
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* Copyright 2017 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 GrBlurredEdgeFragmentProcessor_DEFINED
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#define GrBlurredEdgeFragmentProcessor_DEFINED
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#include "GrFragmentProcessor.h"
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/**
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* Shader for managing a blurred edge for a shadow.
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*
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* There are two blurring modes supported: Gaussian blur function and smoothstep function.
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*
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* If the primitive supports an implicit distance to the edge, the radius of the blur is specified
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* by r & g values of the color in 14.2 fixed point. For spot shadows, we increase the stroke width
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* to set the shadow against the shape. This pad is specified by b, also in 6.2 fixed point.
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* The a value represents the max final alpha.
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*
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* When not using implicit distance, then b in the input color represents the input to the
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* blur function, and r the max final alpha.
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*
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*/
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class GrBlurredEdgeFP : public GrFragmentProcessor {
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public:
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enum Mode {
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kGaussian_Mode,
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kSmoothstep_Mode,
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kLastMode = kSmoothstep_Mode
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};
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static const int kModeCnt = kLastMode + 1;
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static sk_sp<GrFragmentProcessor> Make(Mode mode = kGaussian_Mode) {
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return sk_sp<GrFragmentProcessor>(new GrBlurredEdgeFP(mode));
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}
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const char* name() const override { return "BlurredEdge"; }
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Mode mode() const { return fMode; }
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private:
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GrBlurredEdgeFP(Mode mode)
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: INHERITED(kNone_OptimizationFlags)
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, fMode(mode) {
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// enable output of distance information for shape
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this->setWillUseDistanceVectorField();
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this->initClassID<GrBlurredEdgeFP>();
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}
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GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
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void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
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bool onIsEqual(const GrFragmentProcessor&) const override;
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void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
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GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
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Mode fMode;
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typedef GrFragmentProcessor INHERITED;
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};
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#endif
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