feat: blur-chromatic kombinations-shader

2026-04-23 21:21:45 +02:00
parent e7c71b2675
commit 4d6553bb55
1 changed files with 62 additions and 0 deletions
@@ -0,0 +1,62 @@
+#version 300 es
+precision highp float;
+
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 fragColor;
+
+float blur_channel_r(vec2 center) {
+    float o = 0.003;
+    float c = 0.0;
+    c += texture(tex, center + vec2(-o, -o)).r * 0.0625;
+    c += texture(tex, center + vec2( 0, -o)).r * 0.125;
+    c += texture(tex, center + vec2( o, -o)).r * 0.0625;
+    c += texture(tex, center + vec2(-o,  0)).r * 0.125;
+    c += texture(tex, center             ).r * 0.25;
+    c += texture(tex, center + vec2( o,  0)).r * 0.125;
+    c += texture(tex, center + vec2(-o,  o)).r * 0.0625;
+    c += texture(tex, center + vec2( 0,  o)).r * 0.125;
+    c += texture(tex, center + vec2( o,  o)).r * 0.0625;
+    return c;
+}
+
+float blur_channel_g(vec2 center) {
+    float o = 0.003;
+    float c = 0.0;
+    c += texture(tex, center + vec2(-o, -o)).g * 0.0625;
+    c += texture(tex, center + vec2( 0, -o)).g * 0.125;
+    c += texture(tex, center + vec2( o, -o)).g * 0.0625;
+    c += texture(tex, center + vec2(-o,  0)).g * 0.125;
+    c += texture(tex, center             ).g * 0.25;
+    c += texture(tex, center + vec2( o,  0)).g * 0.125;
+    c += texture(tex, center + vec2(-o,  o)).g * 0.0625;
+    c += texture(tex, center + vec2( 0,  o)).g * 0.125;
+    c += texture(tex, center + vec2( o,  o)).g * 0.0625;
+    return c;
+}
+
+float blur_channel_b(vec2 center) {
+    float o = 0.003;
+    float c = 0.0;
+    c += texture(tex, center + vec2(-o, -o)).b * 0.0625;
+    c += texture(tex, center + vec2( 0, -o)).b * 0.125;
+    c += texture(tex, center + vec2( o, -o)).b * 0.0625;
+    c += texture(tex, center + vec2(-o,  0)).b * 0.125;
+    c += texture(tex, center             ).b * 0.25;
+    c += texture(tex, center + vec2( o,  0)).b * 0.125;
+    c += texture(tex, center + vec2(-o,  o)).b * 0.0625;
+    c += texture(tex, center + vec2( 0,  o)).b * 0.125;
+    c += texture(tex, center + vec2( o,  o)).b * 0.0625;
+    return c;
+}
+
+void main() {
+    float chroma = 0.004;
+    float a = texture(tex, v_texcoord).a;
+
+    float r = blur_channel_r(v_texcoord + vec2( chroma, 0.0));
+    float g = blur_channel_g(v_texcoord);
+    float b = blur_channel_b(v_texcoord - vec2( chroma, 0.0));
+
+    fragColor = vec4(r, g, b, a);
+}