17 lines
442 B
GLSL
17 lines
442 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;
|
|
|
|
void main() {
|
|
float vignette = 1.1 - 0.6 * (dot(v_texcoord0 - 0.5, v_texcoord0 - 0.5) * 2.0);
|
|
vec3 rgb = texture2D(sampler0, v_texcoord0.xy).xyz;
|
|
gl_FragColor.rgb = vignette * rgb;
|
|
gl_FragColor.a = 1.0;
|
|
}
|