GrCustomXfermodePriv.h revision 0063a9b69a6a5d377f207c2aa1ea1e7220c19ba9 
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 GrCustomXfermodePriv_DEFINED
9#define GrCustomXfermodePriv_DEFINED
10
11#include "GrCoordTransform.h"
12#include "GrFragmentProcessor.h"
13#include "GrTextureAccess.h"
14#include "SkXfermode.h"
15
16class GrGLCaps;
17class GrGLFragmentProcessor;
18class GrInvariantOutput;
19class GrProcessorKeyBuilder;
20class GrTexture;
21
22///////////////////////////////////////////////////////////////////////////////
23// Fragment Processor
24///////////////////////////////////////////////////////////////////////////////
25
26class GrCustomXferFP : public GrFragmentProcessor {
27public:
28    GrCustomXferFP(SkXfermode::Mode mode, GrTexture* background);
29
30    void getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const SK_OVERRIDE;
31
32    GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
33
34    const char* name() const SK_OVERRIDE { return "Custom Xfermode"; }
35
36    SkXfermode::Mode mode() const { return fMode; }
37    const GrTextureAccess&  backgroundAccess() const { return fBackgroundAccess; }
38
39private:
40    bool onIsEqual(const GrFragmentProcessor& other) const SK_OVERRIDE;
41
42    void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
43
44    GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
45
46    SkXfermode::Mode fMode;
47    GrCoordTransform fBackgroundTransform;
48    GrTextureAccess  fBackgroundAccess;
49
50    typedef GrFragmentProcessor INHERITED;
51};
52
53#endif
54
55