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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkArithmeticMode_DEFINED | 8 #ifndef SkArithmeticMode_DEFINED |
9 #define SkArithmeticMode_DEFINED | 9 #define SkArithmeticMode_DEFINED |
10 | 10 |
11 #include "SkXfermode.h" | 11 #include "SkFlattenable.h" |
12 #include "SkScalar.h" | |
12 | 13 |
13 class SK_API SkArithmeticMode : public SkXfermode { | 14 class SkXfermode; |
15 | |
16 class SK_API SkArithmeticMode { | |
14 public: | 17 public: |
15 /** | 18 /** |
16 * result = clamp[k1 * src * dst + k2 * src + k3 * dst + k4] | 19 * result = clamp[k1 * src * dst + k2 * src + k3 * dst + k4] |
17 * | 20 * |
18 * src and dst are treated as being [0.0 .. 1.0]. The polynomial is | 21 * src and dst are treated as being [0.0 .. 1.0]. The polynomial is |
19 * evaluated on their unpremultiplied components. | 22 * evaluated on their unpremultiplied components. |
20 * | 23 * |
21 * k1=k2=k3=0, k4=1.0 results in returning opaque white | 24 * k1=k2=k3=0, k4=1.0 results in returning opaque white |
22 * k1=k3=k4=0, k2=1.0 results in returning the src | 25 * k1=k3=k4=0, k2=1.0 results in returning the src |
23 * k1=k2=k4=0, k3=1.0 results in returning the dst | 26 * k1=k2=k4=0, k3=1.0 results in returning the dst |
24 */ | 27 */ |
25 static SkXfermode* Create(SkScalar k1, SkScalar k2, | 28 static SkXfermode* Create(SkScalar k1, SkScalar k2, |
26 SkScalar k3, SkScalar k4); | 29 SkScalar k3, SkScalar k4); |
27 | 30 |
28 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP(); | 31 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
sugoi1
2013/10/09 14:29:58
I added the missing semicolon to remove this line
| |
29 | 32 |
30 private: | 33 private: |
31 typedef SkXfermode INHERITED; | 34 SkArithmeticMode(); // can't be instantiated |
32 }; | 35 }; |
33 | 36 |
34 #endif | 37 #endif |
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