stk-code_catmod/data/shaders/gaussian3h.frag
2013-11-30 21:33:06 +00:00

20 lines
510 B
GLSL

uniform sampler2D tex;
uniform vec2 pixel;
// Gaussian separated blur with radius 3.
void main()
{
vec4 sum = vec4(0.0);
float X = gl_TexCoord[0].x;
float Y = gl_TexCoord[0].y;
sum += texture2D(tex, vec2(X - 3.0 * pixel.x, Y)) * 0.03125;
sum += texture2D(tex, vec2(X - 1.3333 * pixel.x, Y)) * 0.328125;
sum += texture2D(tex, vec2(X, Y)) * 0.273438;
sum += texture2D(tex, vec2(X + 1.3333 * pixel.x, Y)) * 0.328125;
sum += texture2D(tex, vec2(X + 3.0 * pixel.x, Y)) * 0.03125;
gl_FragColor = sum;
}