SkArithmeticMode_gpu.h revision 16a04b84147867b62f92969ac8f4f4a9ab009aea 
1/*
2 * Copyright 2015 Google Inc.
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#ifndef SkArithmeticMode_gpu_DEFINED
9#define SkArithmeticMode_gpu_DEFINED
10
11#if SK_SUPPORT_GPU
12
13#include "GrCoordTransform.h"
14#include "GrFragmentProcessor.h"
15#include "GrTextureAccess.h"
16
17class GrInvariantOutput;
18class GrTexture;
19
20///////////////////////////////////////////////////////////////////////////////
21// Fragment Processor
22///////////////////////////////////////////////////////////////////////////////
23
24class GrGLArtithmeticFP;
25
26class GrArithmeticFP : public GrFragmentProcessor {
27public:
28    static GrFragmentProcessor* Create(float k1, float k2, float k3, float k4, bool enforcePMColor,
29                               GrTexture* background) {
30        return SkNEW_ARGS(GrArithmeticFP, (k1, k2, k3, k4, enforcePMColor, background));
31    }
32
33    ~GrArithmeticFP() SK_OVERRIDE {};
34
35    const char* name() const SK_OVERRIDE { return "Arithmetic"; }
36
37    void getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const SK_OVERRIDE;
38
39    GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
40
41    GrTexture* backgroundTexture() const { return fBackgroundAccess.getTexture(); }
42
43    float k1() const { return fK1; }
44    float k2() const { return fK2; }
45    float k3() const { return fK3; }
46    float k4() const { return fK4; }
47    bool enforcePMColor() const { return fEnforcePMColor; }
48
49private:
50    bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE;
51
52    void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
53
54    GrArithmeticFP(float k1, float k2, float k3, float k4, bool enforcePMColor,
55                   GrTexture* background);
56
57    float                       fK1, fK2, fK3, fK4;
58    bool                        fEnforcePMColor;
59    GrCoordTransform            fBackgroundTransform;
60    GrTextureAccess             fBackgroundAccess;
61
62    GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
63    typedef GrFragmentProcessor INHERITED;
64};
65
66#endif
67#endif
68