blob: a4a313825f9471abcb46f9b0a1f072ea2210016f (
plain) (
blame)
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
|
#version 330 core
// Cell properties.
layout(location = 0) in vec2 gridCoords;
// Glyph properties.
layout(location = 1) in vec4 glyph;
// uv mapping.
layout(location = 2) in vec4 uv;
// Text foreground rgb packed together with cell flags. textColor.a
// are the bitflags; consult RenderingGlyphFlags in renderer/mod.rs
// for the possible values.
layout(location = 3) in vec4 textColor;
// Background color.
layout(location = 4) in vec4 backgroundColor;
out vec2 TexCoords;
flat out vec4 fg;
flat out vec4 bg;
// Terminal properties
uniform vec2 cellDim;
uniform vec4 projection;
uniform int backgroundPass;
#define WIDE_CHAR 1
void main() {
vec2 projectionOffset = projection.xy;
vec2 projectionScale = projection.zw;
// Compute vertex corner position
vec2 position;
position.x = (gl_VertexID == 0 || gl_VertexID == 1) ? 1. : 0.;
position.y = (gl_VertexID == 0 || gl_VertexID == 3) ? 0. : 1.;
// Position of cell from top-left
vec2 cellPosition = cellDim * gridCoords;
if (backgroundPass != 0) {
vec2 backgroundDim = cellDim;
if ((int(textColor.a) & WIDE_CHAR) != 0) {
// Update wide char x dimension so it'll cover the following spacer.
backgroundDim.x *= 2;
}
vec2 finalPosition = cellPosition + backgroundDim * position;
gl_Position =
vec4(projectionOffset + projectionScale * finalPosition, 0.0, 1.0);
TexCoords = vec2(0, 0);
} else {
vec2 glyphSize = glyph.zw;
vec2 glyphOffset = glyph.xy;
glyphOffset.y = cellDim.y - glyphOffset.y;
vec2 finalPosition = cellPosition + glyphSize * position + glyphOffset;
gl_Position =
vec4(projectionOffset + projectionScale * finalPosition, 0.0, 1.0);
vec2 uvOffset = uv.xy;
vec2 uvSize = uv.zw;
TexCoords = uvOffset + position * uvSize;
}
bg = backgroundColor / 255.0;
fg = vec4(textColor.rgb / 255.0, textColor.a);
}
|
