1 files changed, 39 insertions, 0 deletions
diff --git a/.config/hypr/shaders/12_posterization.glsl b/.config/hypr/shaders/12_posterization.glsl
new file mode 100755
index 0000000..e2391e2
--- /dev/null
+++ b/.config/hypr/shaders/12_posterization.glsl
@@ -0,0 +1,39 @@
+#version 300 es
+// Posterization Shader - OPTIMIZED
+// Fixes: Proper rounding, optional dithering to reduce banding
+
+precision highp float;
+
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 fragColor;
+
+// --- CONFIGURATION ---
+const float COLOR_LEVELS = 4.0;
+// Enable dithering to reduce visible banding
+const bool DITHER = true;
+
+// Simple dither pattern
+float dither(vec2 pos) {
+    // 4x4 Bayer matrix approximation
+    vec2 p = fract(pos * 0.5);
+    float d = fract(dot(p, vec2(0.75, 0.5)));
+    return (d - 0.5) / COLOR_LEVELS;
+}
+
+void main() {
+    vec4 color = texture(tex, v_texcoord);
+    
+    vec3 posterized;
+    if (DITHER) {
+        // Add dither noise before quantization
+        float ditherValue = dither(gl_FragCoord.xy);
+        posterized = floor((color.rgb + ditherValue) * COLOR_LEVELS + 0.5) / COLOR_LEVELS;
+    } else {
+        // FIXED: Use round() behavior instead of floor() for better color accuracy
+        posterized = floor(color.rgb * COLOR_LEVELS + 0.5) / COLOR_LEVELS;
+    }
+    
+    posterized = clamp(posterized, 0.0, 1.0);
+    fragColor = vec4(posterized, color.a);
+}