34 lines
1.6 KiB
Plaintext
34 lines
1.6 KiB
Plaintext
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// https://github.com/ttencate/blur_godot4/blob/main/Blur.gdshader
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shader_type canvas_item;
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// Radius that the shader was designed for.
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const float DEFAULT_RADIUS = 10.000000;
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// Unit vector: (1, 0) or (0, 1)
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uniform vec2 step = vec2(0, 1);
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// Desired blur radius.
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uniform float radius = 10.000000;
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uniform sampler2D screen_texture : hint_screen_texture, repeat_disable, filter_nearest;
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uniform sampler2D darken_curve : source_color, repeat_disable;
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uniform float amount;
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void fragment() {
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vec2 s = radius / DEFAULT_RADIUS * step / vec2(textureSize(screen_texture, 0));
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COLOR.rgb =
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0.011194727 * texture(screen_texture, SCREEN_UV - 10.000000000 * s).rgb +
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0.039368696 * texture(screen_texture, SCREEN_UV - 8.415809477 * s).rgb +
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0.071308558 * texture(screen_texture, SCREEN_UV - 6.435363708 * s).rgb +
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0.110237219 * texture(screen_texture, SCREEN_UV - 4.455121108 * s).rgb +
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0.145451038 * texture(screen_texture, SCREEN_UV - 2.475020813 * s).rgb +
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0.163798995 * texture(screen_texture, SCREEN_UV - 0.495000167 * s).rgb +
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0.157439298 * texture(screen_texture, SCREEN_UV + 1.485004498 * s).rgb +
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0.129158204 * texture(screen_texture, SCREEN_UV + 3.465057055 * s).rgb +
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0.090434685 * texture(screen_texture, SCREEN_UV + 5.445220765 * s).rgb +
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0.054043977 * texture(screen_texture, SCREEN_UV + 7.425557483 * s).rgb +
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0.027564604 * texture(screen_texture, SCREEN_UV + 9.406126897 * s).rgb;
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COLOR.a = 1.0;
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float darken = 1.0-distance(SCREEN_UV, vec2(0.5));
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darken = mix(darken, .5, -amount);
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COLOR.rgb = min(COLOR.rgb, texture(darken_curve, vec2(darken)).rgb);
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}
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