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
|
// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
//
// 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.
#version 330 core
in vec2 TexCoords;
flat in vec3 fg;
flat in vec4 bg;
flat in int colored;
uniform int backgroundPass;
layout(location = 0, index = 0) out vec4 color;
layout(location = 0, index = 1) out vec4 alphaMask;
uniform sampler2D mask;
void main()
{
if (backgroundPass != 0) {
if (bg.a == 0.0)
discard;
alphaMask = vec4(1.0);
color = vec4(bg.rgb, 1.0);
} else {
if (colored != 0) {
// Color glyphs, like emojis.
vec4 glyphColor = texture(mask, TexCoords);
alphaMask = vec4(glyphColor.a);
// Revert alpha premultiplication.
if (glyphColor.a != 0) {
glyphColor.rgb = vec3(glyphColor.rgb / glyphColor.a);
}
color = vec4(glyphColor.rgb, 1.0);
} else {
// Regular text glyphs.
vec3 textColor = texture(mask, TexCoords).rgb;
alphaMask = vec4(textColor, textColor.r);
color = vec4(fg, 1.0);
}
}
}
|
