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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* include/graphics/SkAvoidXfermode.h
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#ifndef SkAvoidXfermode_DEFINED
#define SkAvoidXfermode_DEFINED
#include "SkXfermode.h"
/** \class SkAvoidXfermode
This xfermode will draw the src everywhere except on top of the specified
color.
*/
class SkAvoidXfermode : public SkXfermode {
public:
enum Mode {
kAvoidColor_Mode, //!< draw everywhere except on the opColor
kTargetColor_Mode //!< draw only on top of the opColor
};
/** This xfermode will draw the src everywhere except on top of the opColor
or, depending on the Mode, draw only on top of the opColor.
@param opColor the color to avoid (or to target depending on Mode).
note: the alpha in opColor is ignored
@param tolerance How closely we compare a pixel to the opColor.
0 - only operate if exact match
255 - maximum gradation (blending) based on how
similar the pixel is to our opColor (max tolerance)
@param mode If we should avoid or target the opColor
*/
SkAvoidXfermode(SkColor opColor, U8CPU tolerance, Mode mode);
// overrides from SkXfermode
virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
const SkAlpha aa[]);
virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
const SkAlpha aa[]);
virtual void xfer4444(uint16_t dst[], const SkPMColor src[], int count,
const SkAlpha aa[]);
virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
const SkAlpha aa[]);
// overrides from SkFlattenable
virtual Factory getFactory();
virtual void flatten(SkFlattenableWriteBuffer&);
protected:
SkAvoidXfermode(SkFlattenableReadBuffer&);
private:
SkColor fOpColor;
uint32_t fDistMul; // x.14
Mode fMode;
static SkFlattenable* Create(SkFlattenableReadBuffer&);
typedef SkXfermode INHERITED;
};
#endif
|
