mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-09-22 05:11:17 +02:00
43 lines
896 B
GLSL
43 lines
896 B
GLSL
//
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// Simple passthrough fragment shader
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//
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform float strength;
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uniform vec2 center;
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uniform int sampleMode;
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const float nsamples = 32.;
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vec4 sampleTexture(vec2 pos) {
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if(pos.x > 0. && pos.y > 0. && pos.x < 1. && pos.y < 1.)
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return texture2D(gm_BaseTexture, pos);
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if(sampleMode == 0)
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return vec4(0.);
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if(sampleMode == 1)
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return texture2D(gm_BaseTexture, clamp(pos, 0., 1.));
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if(sampleMode == 2)
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return texture2D(gm_BaseTexture, fract(pos));
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return vec4(0.);
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}
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void main() {
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vec2 uv = v_vTexcoord - center;
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float scale_factor = strength * (1. / (nsamples - 1.));
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vec4 color = vec4(0.0);
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for(float i = 0.; i < nsamples; i++) {
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float scale = 1.0 + (i * scale_factor);
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vec2 pos = uv * scale + center;
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color += sampleTexture(pos);
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}
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color /= nsamples;
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gl_FragColor = color;
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}
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