1 files changed, 119 insertions, 0 deletions
diff --git a/config/picom/shaders/glitch_animation.glsl b/config/picom/shaders/glitch_animation.glsl
new file mode 100644
index 0000000..be1e16c
--- /dev/null
+++ b/config/picom/shaders/glitch_animation.glsl
@@ -0,0 +1,119 @@
+#version 330
+
+float maxoff = 10;
+float minoff = 2;
+float hue = 0.3;
+
+float block_max = 500;
+float block_min = 200;
+
+in vec2 texcoord;             // texture coordinate of the fragment
+uniform sampler2D tex;        // texture of the window
+
+vec4 default_post_processing(vec4 c);
+
+uniform float time; // Time in miliseconds.
+
+float max_opacity = 0.9;
+float opacity_threshold(float opacity)
+{
+  // if statement jic?
+  if (opacity >= max_opacity)
+  {
+    return 1.0;
+  }
+  else 
+  {
+    return min(1, opacity/max_opacity);
+  }
+
+}
+
+// Pseudo-random function (from original shader)
+float random(float n) {
+    return fract(sin(n) * 43758.5453f);
+}
+
+float rand_offset(float b, float off) {
+    return (random(b*64) - 0.5) * (off*2);
+}
+
+vec3 hueShift( vec3 color, float hueAdjust ){
+
+    const vec3  kRGBToYPrime = vec3 (0.299, 0.587, 0.114);
+    const vec3  kRGBToI      = vec3 (0.596, -0.275, -0.321);
+    const vec3  kRGBToQ      = vec3 (0.212, -0.523, 0.311);
+
+    const vec3  kYIQToR     = vec3 (1.0, 0.956, 0.621);
+    const vec3  kYIQToG     = vec3 (1.0, -0.272, -0.647);
+    const vec3  kYIQToB     = vec3 (1.0, -1.107, 1.704);
+
+    float   YPrime  = dot (color, kRGBToYPrime);
+    float   I       = dot (color, kRGBToI);
+    float   Q       = dot (color, kRGBToQ);
+    float   hue     = atan (Q, I);
+    float   chroma  = sqrt (I * I + Q * Q);
+
+    hue += hueAdjust;
+
+    Q = chroma * sin (hue);
+    I = chroma * cos (hue);
+
+    vec3    yIQ   = vec3 (YPrime, I, Q);
+
+    return vec3( dot (yIQ, kYIQToR), dot (yIQ, kYIQToG), dot (yIQ, kYIQToB) );
+
+}
+
+vec4 anim(float alpha) {
+    float block = mix(block_max, block_min, alpha);
+    vec2 bs = floor(texcoord / block) * block + block/2;
+
+    float b = random(bs.y) * random(mod(time/10000,2));
+
+    float off = mix(maxoff, minoff, alpha);
+    if (b > alpha) {
+        off = 0;
+    }
+
+    // Offsets in pixels for each color
+    vec2 uvr = vec2(rand_offset(b*1, off), rand_offset(b*6, off));
+    vec2 uvg = vec2(rand_offset(b*2, off), rand_offset(b*7, off));
+    vec2 uvb = vec2(rand_offset(b*3, off), rand_offset(b*8, off));
+
+    // Calculate offset coords
+    uvr += texcoord;
+    uvg += texcoord;
+    uvb += texcoord;
+
+    // Fetch colors using offset coords
+    vec3 offset_color;
+    offset_color.x = texelFetch(tex, ivec2(uvr), 0).x;
+    offset_color.y = texelFetch(tex, ivec2(uvg), 0).y;
+
+    offset_color.x = hueShift(texelFetch(tex, ivec2(uvr), 0).xyz, hue).x;
+    offset_color.y = hueShift(texelFetch(tex, ivec2(uvg), 0).xyz, hue).y;
+    offset_color.z = hueShift(texelFetch(tex, ivec2(uvb), 0).xyz, hue).z;
+
+    offset_color.xyz = hueShift(offset_color.xyz, -hue);
+    
+    // Set the new color
+    vec4 c;
+    c.w = texelFetch(tex, ivec2(uvr), 0).w;
+    c.xyz = offset_color;
+
+    return default_post_processing(c);
+}
+
+vec4 window_shader() {
+    vec4 c = texelFetch(tex, ivec2(texcoord), 0);
+    c = default_post_processing(c);
+    float opacity = opacity_threshold(c.w);
+    if (opacity != 1.0)
+    {
+        c = anim(opacity);
+    }
+    //c = anim(opacity);
+    return default_post_processing(c);
+}
+