soundscope/bloom_x.ps at master · D0ntPanic/soundscope · GitHub

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uniform sampler2D image;

void main(void)
{
	float sum;
	sum = texture2D(image, gl_TexCoord[0].xy - vec2(4.0 / 96.0, 0)).r * (1.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy - vec2(3.0 / 96.0, 0)).r * (2.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy - vec2(2.0 / 96.0, 0)).r * (3.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy - vec2(1.0 / 96.0, 0)).r * (4.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy).r * (5.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy + vec2(1.0 / 96.0, 0)).r * (4.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy + vec2(2.0 / 96.0, 0)).r * (3.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy + vec2(3.0 / 96.0, 0)).r * (2.0/25.0);
	sum += texture2D(image, gl_TexCoord[0].xy + vec2(4.0 / 96.0, 0)).r * (1.0/25.0);
	gl_FragColor = vec4(sum, sum, sum, 1);
}