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https://github.com/Ttanasart-pt/Pixel-Composer.git
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23 lines
547 B
GLSL
23 lines
547 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 int mode;
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uniform float thr;
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uniform float smooth;
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void main() {
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vec4 col = v_vColour * texture2D( gm_BaseTexture, v_vTexcoord );
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if(mode == 0) {
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float bright = dot(col.rgb, vec3(0.2126, 0.7152, 0.0722));
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col.rgb = vec3(smooth == 0.? step(thr, bright) : smoothstep(thr - smooth, thr + smooth, bright));
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} else {
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col.a = smooth == 0.? step(thr, col.a) : smoothstep(thr - smooth, thr + smooth, col.a);
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}
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gl_FragColor = col;
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}
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