-
Notifications
You must be signed in to change notification settings - Fork 1
/
psx2.tres
46 lines (35 loc) · 1.02 KB
/
psx2.tres
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
[gd_resource type="Shader" format=2]
[resource]
code = "shader_type spatial;
render_mode unshaded, shadows_disabled, depth_test_disable, depth_draw_never;
uniform int color_depth : hint_range(1, 8) = 5;
uniform bool dithering = true;
uniform int resolution_scale = 4;
int dithering_pattern(ivec2 fragcoord) {
const int pattern[] = {
-4, +0, -3, +1,
+2, -2, +3, -1,
-3, +1, -4, +0,
+3, -1, +2, -2
};
int x = fragcoord.x % 4;
int y = fragcoord.y % 4;
return pattern[y * 4 + x];
}
void vertex() {
POSITION = vec4(VERTEX, 1.0);
}
void fragment() {
ivec2 uv = ivec2(FRAGCOORD.xy / float(resolution_scale));
vec3 color = texelFetch(SCREEN_TEXTURE, uv * resolution_scale, 0).rgb;
// Convert from [0.0, 1.0] range to [0, 255] range
ivec3 c = ivec3(round(color * 255.0));
// Apply the dithering pattern
if (dithering) {
c += ivec3(dithering_pattern(uv));
}
// Truncate from 8 bits to color_depth bits
c >>= (8 - color_depth);
// Convert back to [0.0, 1.0] range
ALBEDO = vec3(c) / float(1 << color_depth);
}"