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
|
layout(lines) in;
layout(triangle_strip, max_vertices = 4) out;
uniform vec2 viewportSize;
uniform vec2 viewportSizeInv;
uniform float edgeScale;
in vec4 finalColor[2];
in vec4 finalColorOuter[2];
in int selectOveride[2];
flat out vec4 finalColorOuter_f;
out vec4 finalColor_f;
out float edgeCoord_f;
void do_vertex(const int i, float coord, vec2 offset)
{
finalColor_f = (selectOveride[0] == 0) ? finalColor[i] : finalColor[0];
edgeCoord_f = coord;
gl_Position = gl_in[i].gl_Position;
/* Multiply offset by 2 because gl_Position range is [-1..1]. */
gl_Position.xy += offset * 2.0 * gl_Position.w;
EmitVertex();
}
void main()
{
vec2 ss_pos[2];
ss_pos[0] = gl_in[0].gl_Position.xy / gl_in[0].gl_Position.w;
ss_pos[1] = gl_in[1].gl_Position.xy / gl_in[1].gl_Position.w;
vec2 line = ss_pos[0] - ss_pos[1];
line = abs(line) * viewportSize;
finalColorOuter_f = finalColorOuter[0];
float half_size = sizeEdge * edgeScale;
/* Enlarge edge for flag display. */
half_size += (finalColorOuter_f.a > 0.0) ? max(sizeEdge * edgeScale, 1.0) : 0.0;
/* Add 1 px for AA */
half_size += 0.5;
vec3 edge_ofs = half_size * viewportSizeInv.xyy * vec3(1.0, 1.0, 0.0);
bool horizontal = line.x > line.y;
edge_ofs = (horizontal) ? edge_ofs.zyz : edge_ofs.xzz;
do_vertex(0, half_size, edge_ofs.xy);
do_vertex(0, -half_size, -edge_ofs.xy);
do_vertex(1, half_size, edge_ofs.xy);
do_vertex(1, -half_size, -edge_ofs.xy);
EndPrimitive();
}
|
