SFML/dotnet/examples/bin/datas/shader/blur.sfx

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uniform sampler2D texture;
uniform float offset;
void main()
{
vec2 offx = vec2(offset, 0.0);
vec2 offy = vec2(0.0, offset);
vec4 c0 = texture2D(texture, gl_TexCoord[0].xy);
vec4 c1 = texture2D(texture, gl_TexCoord[0].xy - offy);
vec4 c2 = texture2D(texture, gl_TexCoord[0].xy + offy);
vec4 c3 = texture2D(texture, gl_TexCoord[0].xy - offx);
vec4 c4 = texture2D(texture, gl_TexCoord[0].xy + offx);
gl_FragColor = gl_Color * (c0 * 0.2 + c1 * 0.2 + c2 * 0.2 + c3 * 0.2 + c4 * 0.2);
}