16 lines
520 B
Forth
16 lines
520 B
Forth
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// [ref] https://rastergrid.com/blog/2010/09/efficient-gaussian-blur-with-linear-sampling/
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uniform float intensity; /// set:4
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void mainImage( out vec4 fragColor, in vec2 fragCoord ) {
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vec2 uv = fragCoord.xy / iResolution.xy;
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vec4 base = texture(iChannel0, uv), color = vec4(0.0);
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vec2 offset = vec2(0,intensity) / iResolution;
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color += base * 0.30;
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color += texture(iChannel0, uv + offset) * 0.35;
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color += texture(iChannel0, uv - offset) * 0.35;
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fragColor = vec4( color.rgb, base.a );
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}
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