79 lines
2.3 KiB
GLSL
79 lines
2.3 KiB
GLSL
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#version 330
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in vec2 fragCoord;
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out vec4 fragColor;
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// bar values. defaults to left channels first (low to high), then right (high to low).
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uniform float bars[512];
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uniform int bars_count; // number of bars (left + right) (configurable)
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uniform int bar_width; // bar width (configurable), not used here
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uniform int bar_spacing; // space bewteen bars (configurable)
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uniform vec3 u_resolution; // window resolution
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//colors, configurable in cava config file (r,g,b) (0.0 - 1.0)
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uniform vec3 bg_color; // background color
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uniform vec3 fg_color; // foreground color
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uniform int gradient_count;
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uniform vec3 gradient_colors[8]; // gradient colors
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vec3 normalize_C(float y,vec3 col_1, vec3 col_2, float y_min, float y_max)
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{
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//create color based on fraction of this color and next color
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float yr = (y - y_min) / (y_max - y_min);
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return col_1 * (1.0 - yr) + col_2 * yr;
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}
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void main()
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{
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// find which bar to use based on where we are on the x axis
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float x = u_resolution.x * fragCoord.x;
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int bar = int(bars_count * fragCoord.x);
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//calculate a bar size
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float bar_size = u_resolution.x / bars_count;
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//the y coordinate and bar values are the same
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float y = bars[bar];
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// make sure there is a thin line at bottom
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if (y * u_resolution.y < 1.0)
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{
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y = 1.0 / u_resolution.y;
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}
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//draw the bar up to current height
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if (y > fragCoord.y)
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{
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//make some space between bars basen on settings
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if (x > (bar + 1) * (bar_size) - bar_spacing)
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{
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fragColor = vec4(bg_color,1.0);
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}
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else
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{
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if (gradient_count == 0)
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{
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fragColor = vec4(fg_color,1.0);
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}
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else
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{
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//find which color in the configured gradient we are at
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int color = int((gradient_count - 1) * fragCoord.y);
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//find where on y this and next color is supposed to be
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float y_min = color / (gradient_count - 1.0);
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float y_max = (color + 1.0) / (gradient_count - 1.0);
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//make color
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fragColor = vec4(normalize_C(fragCoord.y, gradient_colors[color], gradient_colors[color + 1], y_min, y_max), 1.0);
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}
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}
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}
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else
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{
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fragColor = vec4(bg_color,1.0);
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}
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}
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