1/*
2 * Copyright 2019 Google LLC
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/**************************************************************************************************
9 *** This file was autogenerated from GrRGBToHSLFilterEffect.fp; do not modify.
10 **************************************************************************************************/
11#ifndef GrRGBToHSLFilterEffect_DEFINED
12#define GrRGBToHSLFilterEffect_DEFINED
13#include "include/core/SkTypes.h"
14#include "include/core/SkM44.h"
15
16#include "src/gpu/GrCoordTransform.h"
17#include "src/gpu/GrFragmentProcessor.h"
18class GrRGBToHSLFilterEffect : public GrFragmentProcessor {
19public:
20#include "include/private/SkColorData.h"
21
22 SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& c) const override {
23 const auto p = (c.fG < c.fB) ? SkPMColor4f{c.fB, c.fG, -1, 2 / 3.f}
24 : SkPMColor4f{c.fG, c.fB, 0, -1 / 3.f},
25 q = (c.fR < p[0]) ? SkPMColor4f{p[0], c.fR, p[1], p[3]}
26 : SkPMColor4f{c.fR, p[0], p[1], p[2]};
27
28 const auto eps = 0.0001f, // matching SkSL/ColorMatrix half4 epsilon
29 pmV = q[0], pmC = pmV - std::min(q[1], q[2]), pmL = pmV - pmC * 0.5f,
30 H = std::abs(q[3] + (q[1] - q[2]) / (pmC * 6 + eps)),
31 S = pmC / (c.fA + eps - std::abs(pmL * 2 - c.fA)), L = pmL / (c.fA + eps);
32
33 return {H, S, L, c.fA};
34 }
35 static std::unique_ptr<GrFragmentProcessor> Make() {
36 return std::unique_ptr<GrFragmentProcessor>(new GrRGBToHSLFilterEffect());
37 }
38 GrRGBToHSLFilterEffect(const GrRGBToHSLFilterEffect& src);
39 std::unique_ptr<GrFragmentProcessor> clone() const override;
40 const char* name() const override { return "RGBToHSLFilterEffect"; }
41
42private:
43 GrRGBToHSLFilterEffect()
44 : INHERITED(kGrRGBToHSLFilterEffect_ClassID,
45 (OptimizationFlags)(kConstantOutputForConstantInput_OptimizationFlag |
46 kPreservesOpaqueInput_OptimizationFlag)) {}
47 GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
48 void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
49 bool onIsEqual(const GrFragmentProcessor&) const override;
50 GR_DECLARE_FRAGMENT_PROCESSOR_TEST
51 typedef GrFragmentProcessor INHERITED;
52};
53#endif
54