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
114
115
116
117
118
119
120
|
/*
* Copyright (C) 2010 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_SKIA_SHADER_H
#define ANDROID_HWUI_SKIA_SHADER_H
#include <SkShader.h>
#include <SkXfermode.h>
#include <GLES2/gl2.h>
#include <cutils/compiler.h>
#include "Extensions.h"
#include "ProgramCache.h"
#include "TextureCache.h"
#include "GradientCache.h"
namespace android {
namespace uirenderer {
class Caches;
class Layer;
/**
* Type of Skia shader in use.
*/
enum SkiaShaderType {
kNone_SkiaShaderType,
kBitmap_SkiaShaderType,
kGradient_SkiaShaderType,
kCompose_SkiaShaderType,
kLayer_SkiaShaderType
};
class SkiaShader {
public:
static SkiaShaderType getType(const SkShader& shader);
static void describe(Caches* caches, ProgramDescription& description,
const Extensions& extensions, const SkShader& shader);
static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
};
class InvalidSkiaShader {
public:
static void describe(Caches* /* caches */, ProgramDescription& /* description */,
const Extensions& /* extensions */, const SkShader& /* shader */) {
// This shader is unsupported. Skip it.
}
static void setupProgram(Caches* /* caches */, const mat4& /* modelViewMatrix */,
GLuint* /* textureUnit */, const Extensions& /* extensions */,
const SkShader& /* shader */) {
// This shader is unsupported. Skip it.
}
};
/**
* A shader that draws a layer.
*/
class SkiaLayerShader {
public:
static void describe(Caches* caches, ProgramDescription& description,
const Extensions& extensions, const SkShader& shader);
static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
}; // class SkiaLayerShader
/**
* A shader that draws a bitmap.
*/
class SkiaBitmapShader {
public:
static void describe(Caches* caches, ProgramDescription& description,
const Extensions& extensions, const SkShader& shader);
static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
}; // class SkiaBitmapShader
/**
* A shader that draws one of three types of gradient, depending on shader param.
*/
class SkiaGradientShader {
public:
static void describe(Caches* caches, ProgramDescription& description,
const Extensions& extensions, const SkShader& shader);
static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
};
/**
* A shader that draws two shaders, composited with an xfermode.
*/
class SkiaComposeShader {
public:
static void describe(Caches* caches, ProgramDescription& description,
const Extensions& extensions, const SkShader& shader);
static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
}; // class SkiaComposeShader
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_SKIA_SHADER_H
|
