mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-09-21 12:52:43 +02:00
41 lines
1.2 KiB
GLSL
41 lines
1.2 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 float kernel[9];
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uniform int sampleMode;
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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 tex = 1. / dimension;
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vec4 c = + kernel[0] * sampleTexture( v_vTexcoord + vec2(-tex.x, -tex.y) )
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+ kernel[1] * sampleTexture( v_vTexcoord + vec2( 0., -tex.y) )
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+ kernel[2] * sampleTexture( v_vTexcoord + vec2( tex.x, -tex.y) )
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+ kernel[3] * sampleTexture( v_vTexcoord + vec2(-tex.x, 0.) )
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+ kernel[4] * sampleTexture( v_vTexcoord + vec2( 0., 0.) )
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+ kernel[5] * sampleTexture( v_vTexcoord + vec2( tex.x, 0.) )
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+ kernel[6] * sampleTexture( v_vTexcoord + vec2(-tex.x, tex.y) )
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+ kernel[7] * sampleTexture( v_vTexcoord + vec2( 0., tex.y) )
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+ kernel[8] * sampleTexture( v_vTexcoord + vec2( tex.x, tex.y) );
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gl_FragColor = vec4(c.rgb, 1.);
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}
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