mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-11-14 14:33:53 +01:00
75 lines
1.7 KiB
GLSL
75 lines
1.7 KiB
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 vec2 dimension;
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uniform int algorithm;
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uniform int shape;
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uniform float size;
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uniform int sampleMode;
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vec4 sampleTexture(vec2 pos) { #region
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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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else if(sampleMode == 1)
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return texture2D(gm_BaseTexture, clamp(pos, 0., 1.));
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else if(sampleMode == 2)
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return texture2D(gm_BaseTexture, fract(pos));
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else if(sampleMode == 3)
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return vec4(vec3(0.), 1.);
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return vec4(0.);
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} #endregion
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float bright(in vec4 col) { return dot(col.rgb, vec3(0.2126, 0.7152, 0.0722)) * col.a; }
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void main() {
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vec2 tex = 1. / dimension;
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vec4 acc = vec4(0.);
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vec4 maxx = vec4(0.), minn = vec4(1.);
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float weight = 0., _w;
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vec4 col = sampleTexture(v_vTexcoord);
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for(float i = -size; i <= size; i++)
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for(float j = -size; j <= size; j++) {
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if(shape == 1 && i * i + j * j > size * size)
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continue;
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if(shape == 2 && abs(i) + abs(j) > size)
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continue;
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if(shape == 0)
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_w = min(size - abs(i), size - abs(j));
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else if(shape == 1)
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_w = size - length(vec2(i, j));
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else if(shape == 2)
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_w = size - (abs(i) + abs(j));
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vec4 col = sampleTexture(v_vTexcoord + vec2(i, j) * tex);
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if(algorithm == 0) {
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acc += col;
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weight++;
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} else if(algorithm == 1) {
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maxx = max(maxx, col);
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} else if(algorithm == 2) {
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minn = min(minn, col);
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}
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}
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if(algorithm == 0)
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gl_FragColor = acc / weight;
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else if(algorithm == 1)
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gl_FragColor = maxx;
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else if(algorithm == 2)
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gl_FragColor = minn;
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}
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