Warning, /plasma/kwin/src/plugins/blur/shaders/downsample.frag is written in an unsupported language. File is not indexed.
0001 uniform sampler2D texUnit;
0002 uniform float offset;
0003 uniform vec2 halfpixel;
0004
0005 varying vec2 uv;
0006
0007 void main(void)
0008 {
0009 vec4 sum = texture2D(texUnit, uv) * 4.0;
0010 sum += texture2D(texUnit, uv - halfpixel.xy * offset);
0011 sum += texture2D(texUnit, uv + halfpixel.xy * offset);
0012 sum += texture2D(texUnit, uv + vec2(halfpixel.x, -halfpixel.y) * offset);
0013 sum += texture2D(texUnit, uv - vec2(halfpixel.x, -halfpixel.y) * offset);
0014
0015 gl_FragColor = sum / 8.0;
0016 }