mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
23 lines
583 B
GLSL
23 lines
583 B
GLSL
// Simple vignette shader - darker towards the corners like in the unprocessed output of a real camera.
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
precision mediump int;
|
|
#endif
|
|
|
|
uniform sampler2D sampler0;
|
|
varying vec2 v_texcoord0;
|
|
|
|
uniform vec4 u_setting;
|
|
|
|
void main() {
|
|
vec2 diff = v_texcoord0 - 0.5;
|
|
diff.x *= u_setting.y;
|
|
diff.y /= u_setting.y;
|
|
float vignette = 1.0 - min(1.0, u_setting.x * (dot(diff, diff) * 2.0));
|
|
vec3 rgb = texture2D(sampler0, v_texcoord0.xy).xyz;
|
|
rgb *= vignette;
|
|
gl_FragColor.rgb = vignette * rgb;
|
|
gl_FragColor.a = 1.0;
|
|
}
|