1 /*
2  * Copyright 2013 The Android Open Source Project
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 SkXfermodeImageFilter_DEFINED
9 #define SkXfermodeImageFilter_DEFINED
10 
11 #include "SkArithmeticImageFilter.h"
12 #include "SkBlendMode.h"
13 #include "SkImageFilter.h"
14 
15 /**
16  * This filter takes a SkBlendMode, and uses it to composite the foreground over the background.
17  * If foreground or background is NULL, the input bitmap (src) is used instead.
18  */
19 class SK_API SkXfermodeImageFilter {
20 public:
21     static sk_sp<SkImageFilter> Make(SkBlendMode, sk_sp<SkImageFilter> background,
22                                      sk_sp<SkImageFilter> foreground,
23                                      const SkImageFilter::CropRect* cropRect);
Make(SkBlendMode mode,sk_sp<SkImageFilter> background)24     static sk_sp<SkImageFilter> Make(SkBlendMode mode, sk_sp<SkImageFilter> background) {
25         return Make(mode, std::move(background), nullptr, nullptr);
26     }
27 
28     // Arithmetic image filtering used to be implemented using SkXfermode. Some clients still rely
29     // on these factories existing in this class.
MakeArithmetic(float k1,float k2,float k3,float k4,bool enforcePMColor,sk_sp<SkImageFilter> background,sk_sp<SkImageFilter> foreground,const SkImageFilter::CropRect * cropRect)30     static sk_sp<SkImageFilter> MakeArithmetic(float k1, float k2, float k3, float k4,
31                                                bool enforcePMColor, sk_sp<SkImageFilter> background,
32                                                sk_sp<SkImageFilter> foreground,
33                                                const SkImageFilter::CropRect* cropRect) {
34         return SkArithmeticImageFilter::Make(k1, k2, k3, k4, enforcePMColor, std::move(background),
35                                              std::move(foreground), cropRect);
36     }
MakeArithmetic(float k1,float k2,float k3,float k4,bool enforcePMColor,sk_sp<SkImageFilter> background)37     static sk_sp<SkImageFilter> MakeArithmetic(float k1, float k2, float k3, float k4,
38                                                bool enforcePMColor,
39                                                sk_sp<SkImageFilter> background) {
40         return SkArithmeticImageFilter::Make(k1, k2, k3, k4, enforcePMColor, std::move(background));
41     }
42 
43     SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP();
44 
45 private:
46     SkXfermodeImageFilter();    // can't instantiate
47 };
48 
49 #endif
50