Pixel-Composer/shaders/sh_downsample/sh_downsample.fsh

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2023-03-26 07:13:36 +02:00
//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying vec4 v_vColour;
uniform float down;
uniform vec2 dimension;
void main() {
vec4 col = vec4(0.);
float wei = 0.;
for( float i = 0.; i < down; i++ )
for( float j = 0.; j < down; j++ ) {
vec4 samp = texture2D( gm_BaseTexture, v_vTexcoord * down + vec2(i, j) / dimension );
col += samp;
}
col /= down * down;
gl_FragColor = col;
}