27 lines
745 B
GLSL
27 lines
745 B
GLSL
#version 110
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uniform sampler2D image;
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uniform float radius;
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uniform vec2 resolution;
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uniform bool horiz_blur;
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uniform bool vert_blur;
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void main(void) {
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float rad = floor(radius);
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float x_rad = (horiz_blur) ? rad : 0.5;
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float y_rad = (vert_blur) ? rad : 0.5;
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vec2 texCoord = gl_FragCoord.xy/resolution;
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if (radius == 0.0 || (!horiz_blur && !vert_blur)) {
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gl_FragColor = texture2D(image, texCoord);
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} else {
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float divider = 1.0;
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if (horiz_blur) divider /= rad;
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if (vert_blur) divider /= rad;
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for (float x=-x_rad+0.5;x<=x_rad;x+=2.0) {
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for (float y=-y_rad+0.5;y<=y_rad;y+=2.0) {
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gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+x, gl_FragCoord.y+y))/resolution)*(divider);
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}
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}
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}
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} |