stk-code_catmod/data/shaders/logluminance.frag

14 lines
259 B
GLSL

uniform sampler2D tex;
in vec2 uv;
out vec4 FragColor;
float delta = 0.0001;
void main()
{
vec3 weight = vec3(0.2125f, 0.7154f, 0.0721f);
vec3 col = texture(tex, uv).xyz;
float luma = dot(col, weight);
FragColor = vec4(log(luma + delta));
}