v4k-git-backup/demos/html5/art/fx/fxSepia.fs

15 lines
498 B
GLSL

uniform float intensity = 1.0;
void mainImage( out vec4 fragColor, in vec2 fragCoord ) {
vec2 uv = fragCoord.xy / iResolution.xy;
vec4 src = texture(iChannel0, uv);
vec3 color = vec3(
dot(src.rgb, vec3(0.393 * intensity, 0.769 * intensity, 0.189 * intensity)),
dot(src.rgb, vec3(0.349 * intensity, 0.686 * intensity, 0.168 * intensity)),
dot(src.rgb, vec3(0.272 * intensity, 0.534 * intensity, 0.131 * intensity))
);
fragColor = vec4(color, src.a);
}