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Terrarum/assets/shaders/ghastlywhite.frag
2021-12-13 00:57:55 +09:00

13 lines
391 B
GLSL

varying vec4 v_color;
varying vec2 v_texCoords;
uniform sampler2D u_texture;
vec2 boolean = vec2(0.0, 1.0);
vec4 desaturate = vec4(0.2126, 0.7152, 0.0722, 0.0);
void main(void) {
vec4 incolour = texture2D(u_texture, v_texCoords);
float lum = dot(incolour * desaturate, boolean.yyyx) * 0.5 + 0.5;
gl_FragColor = v_color * (vec4(lum) * boolean.yyyx + incolour * boolean.xxxy);
}