blob: c5e5186866d28b74f83b1c914777dc05a5c0b424 (
plain)
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 ANDROID_HWUI_STENCIL_H
#define ANDROID_HWUI_STENCIL_H
#ifndef LOG_TAG
#define LOG_TAG "OpenGLRenderer"
#endif
#include <GLES2/gl2.h>
#include <cutils/compiler.h>
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Stencil buffer management
///////////////////////////////////////////////////////////////////////////////
class ANDROID_API Stencil {
public:
Stencil();
/**
* Returns the desired size for the stencil buffer. If the returned value
* is 0, then no stencil buffer is required.
*/
ANDROID_API static uint8_t getStencilSize();
/**
* Returns the smallest stencil format accepted by render buffers.
*/
static GLenum getSmallestStencilFormat();
/**
* Clears the stencil buffer.
*/
void clear();
/**
* Enables stencil test. When the stencil test is enabled the stencil
* buffer is not written into.
*/
void enableTest();
/**
* Enables stencil write. When stencil write is enabled, the stencil
* test always succeeds and the value 0x1 is written in the stencil
* buffer for each fragment.
*/
void enableWrite();
/**
* The test passes only when equal to the specified value.
*/
void enableDebugTest(GLint value, bool greater = false);
/**
* Used for debugging. The stencil test always passes and increments.
*/
void enableDebugWrite();
/**
* Disables stencil test and write.
*/
void disable();
/**
* Indicates whether either test or write is enabled.
*/
bool isEnabled() {
return mState != kDisabled;
}
/**
* Indicates whether testing only is enabled.
*/
bool isTestEnabled() {
return mState == kTest;
}
private:
void enable();
enum StencilState {
kDisabled,
kTest,
kWrite
};
StencilState mState;
}; // class Stencil
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_STENCIL_H
|
