bitzdots

1#version 330
2 
3in vec2 fragCoord;
4out vec4 fragColor;
5 
6// bar values. defaults to left channels first (low to high), then right (high
7// to low).
8uniform float bars[512];
9 
10uniform int bars_count;  // number of bars (left + right) (configurable)
11uniform int bar_width;   // bar width (configurable), not used here
12uniform int bar_spacing; // space bewteen bars (configurable)
13 
14uniform vec3 u_resolution; // window resolution
15 
16// colors, configurable in cava config file (r,g,b) (0.0 - 1.0)
17uniform vec3 bg_color; // background color
18uniform vec3 fg_color; // foreground color
19 
20uniform int gradient_count;
21uniform vec3 gradient_colors[8]; // gradient colors
22 
23uniform sampler2D inputTexture; // Texture from the last render pass
24 
25vec3 normalize_C(float y, vec3 col_1, vec3 col_2, float y_min, float y_max) {
26    // create color based on fraction of this color and next color
27    float yr = (y - y_min) / (y_max - y_min);
28    return col_1 * (1.0 - yr) + col_2 * yr;
29}
30 
31void main() {
32    // find which bar to use based on where we are on the y axis
33    int bar = int(bars_count * fragCoord.y);
34    float y = bars[bar];
35    float band_size = 1.0 / float(bars_count);
36    float current_band_min = bar * band_size;
37    float current_band_max = (bar + 1) * band_size;
38 
39    int hist_length = 512;
40    float win_size = 1.0 / hist_length;
41 
42    if (fragCoord.x > 1.0 - win_size) {
43 
44        if (fragCoord.y > current_band_min && fragCoord.y < current_band_max) {
45 
46            fragColor = vec4(fg_color * y, 1.0);
47        }
48    } else {
49        vec2 offsetCoord = fragCoord;
50        offsetCoord.x += float(win_size);
51        fragColor = texture(inputTexture, offsetCoord);
52    }
53}