1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkArithmeticMode_DEFINED
#define SkArithmeticMode_DEFINED
#include "SkFlattenable.h"
#include "SkScalar.h"
#include "SkXfermode.h"
#ifdef SK_SUPPORT_LEGACY_ARITHMETICMODE
class SK_API SkArithmeticMode {
public:
/**
* result = clamp[k1 * src * dst + k2 * src + k3 * dst + k4]
*
* k1=k2=k3=0, k4=1.0 results in returning opaque white
* k1=k3=k4=0, k2=1.0 results in returning the src
* k1=k2=k4=0, k3=1.0 results in returning the dst
*/
static sk_sp<SkXfermode> Make(SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4,
bool enforcePMColor = true);
#ifdef SK_SUPPORT_LEGACY_XFERMODE_PTR
static SkXfermode* Create(SkScalar k1, SkScalar k2,
SkScalar k3, SkScalar k4,
bool enforcePMColor = true) {
return Make(k1, k2, k3, k4, enforcePMColor).release();
}
#endif
SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP();
private:
SkArithmeticMode(); // can't be instantiated
};
#endif
#endif
|
