stk-code_catmod/data/shaders/gaussian3h.frag

uniform sampler2D tex;
uniform vec2 pixel;

// Gaussian separated blur with radius 3.

#if __VERSION__ >= 130
in vec2 uv;
out vec4 FragColor;
#else
varying vec2 uv;
#define FragColor gl_FragColor
#endif

void main()
{
	vec4 sum = vec4(0.0);
	float X = uv.x;
	float Y = uv.y;

	sum += texture(tex, vec2(X - 3.0 * pixel.x, Y)) * 0.03125;
	sum += texture(tex, vec2(X - 1.3333 * pixel.x, Y)) * 0.328125;
	sum += texture(tex, vec2(X, Y)) * 0.273438;
	sum += texture(tex, vec2(X + 1.3333 * pixel.x, Y)) * 0.328125;
	sum += texture(tex, vec2(X + 3.0 * pixel.x, Y)) * 0.03125;

	FragColor = sum;
}