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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
#ifndef _SWAY_SHADERS_H
#define _SWAY_SHADERS_H
#include <GLES2/gl2.h>
// Colored quads
const GLchar quad_vertex_src[] =
"uniform mat3 proj;\n"
"uniform vec4 color;\n"
"attribute vec2 pos;\n"
"attribute vec2 texcoord;\n"
"varying vec4 v_color;\n"
"varying vec2 v_texcoord;\n"
"\n"
"void main() {\n"
" gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);\n"
" v_color = color;\n"
" v_texcoord = texcoord;\n"
"}\n";
const GLchar quad_fragment_src[] =
"precision mediump float;\n"
"varying vec4 v_color;\n"
"varying vec2 v_texcoord;\n"
"\n"
"void main() {\n"
" gl_FragColor = v_color;\n"
"}\n";
// Textured quads
const GLchar tex_vertex_src[] =
"uniform mat3 proj;\n"
"attribute vec2 pos;\n"
"attribute vec2 texcoord;\n"
"varying vec2 v_texcoord;\n"
"\n"
"void main() {\n"
" gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);\n"
" v_texcoord = texcoord;\n"
"}\n";
const GLchar tex_fragment_src_rgba[] =
"precision mediump float;\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"uniform float alpha;\n"
"\n"
"uniform vec2 size;\n"
"uniform vec2 position;\n"
"uniform float radius;\n"
"\n"
"void main() {\n"
" gl_FragColor = texture2D(tex, v_texcoord) * alpha;\n"
" vec2 corner_distance = min(gl_FragCoord.xy - position, size + position - gl_FragCoord.xy);\n"
" if (max(corner_distance.x, corner_distance.y) < radius) {\n"
" float d = radius - distance(corner_distance, vec2(radius));\n"
" float smooth = smoothstep(-1.0f, 0.5f, d);\n"
" gl_FragColor = mix(vec4(0), gl_FragColor, smooth);\n"
" }\n"
"}\n";
const GLchar tex_fragment_src_rgbx[] =
"precision mediump float;\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"uniform float alpha;\n"
"\n"
"uniform vec2 size;\n"
"uniform vec2 position;\n"
"uniform float radius;\n"
"\n"
"void main() {\n"
" gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0) * alpha;\n"
" vec2 corner_distance = min(gl_FragCoord.xy - position, position + size - gl_FragCoord.xy);\n"
" if (max(corner_distance.x, corner_distance.y) < radius) {\n"
" float d = radius - distance(corner_distance, vec2(radius));\n"
" float smooth = smoothstep(-1.0f, 0.5f, d);\n"
" gl_FragColor = mix(vec4(0), gl_FragColor, smooth);\n"
" }\n"
"}\n";
const GLchar tex_fragment_src_external[] =
"#extension GL_OES_EGL_image_external : require\n"
"\n"
"precision mediump float;\n"
"varying vec2 v_texcoord;\n"
"uniform samplerExternalOES texture0;\n"
"uniform float alpha;\n"
"\n"
"uniform vec2 size;\n"
"uniform vec2 position;\n"
"uniform float radius;\n"
"\n"
"void main() {\n"
" gl_FragColor = texture2D(texture0, v_texcoord) * alpha;\n"
" vec2 corner_distance = min(gl_FragCoord.xy - position, position + size - gl_FragCoord.xy);\n"
" if (max(corner_distance.x, corner_distance.y) < radius) {\n"
" float d = radius - distance(corner_distance, vec2(radius));\n"
" float smooth = smoothstep(-1.0f, 0.5f, d);\n"
" gl_FragColor = mix(vec4(0), gl_FragColor, smooth);\n"
" }\n"
"}\n";
const GLchar corner_fragment_src[] =
"precision mediump float;\n"
"varying vec4 v_color;\n"
"varying vec2 v_texcoord;\n"
"\n"
"uniform bool is_top_left;\n"
"uniform bool is_top_right;\n"
"uniform bool is_bottom_left;\n"
"uniform bool is_bottom_right;\n"
"\n"
"uniform vec2 position;\n"
"uniform float radius;\n"
"uniform vec2 half_size;\n"
"uniform float half_thickness;\n"
"\n"
"float roundedBoxSDF(vec2 center, vec2 size, float radius) {\n"
" return length(max(abs(center) - size + radius, 0.0)) - radius;\n"
"}\n"
"\n"
"void main() {\n"
" vec2 center = gl_FragCoord.xy - position - half_size;\n"
" float distance = roundedBoxSDF(center, half_size - half_thickness, radius + half_thickness);\n"
" float smoothedAlphaOuter = 1.0 - smoothstep(-1.0, 1.0, distance - half_thickness);\n"
// Create an inner circle that isn't as anti-aliased as the outer ring
" float smoothedAlphaInner = 1.0 - smoothstep(-1.0, 0.5, distance + half_thickness);\n"
" gl_FragColor = mix(vec4(0), v_color, smoothedAlphaOuter - smoothedAlphaInner);\n"
"\n"
" if (is_top_left && (center.y > 0.0 || center.x > 0.0)) {\n"
" discard;\n"
" } else if (is_top_right && (center.y > 0.0 || center.x < 0.0)) {\n"
" discard;\n"
" } else if (is_bottom_left && (center.y < 0.0 || center.x > 0.0)) {\n"
" discard;\n"
" } else if (is_bottom_right && (center.y < 0.0 || center.x < 0.0)) {\n"
" discard;\n"
" }\n"
"}\n";
#endif
|
