From 8f5547acc938795555ed86219c0175d38b7f0dba Mon Sep 17 00:00:00 2001
From: Schrottkatze <git@schrottkatze.de>
Date: Wed, 16 Apr 2025 12:57:21 +0200
Subject: [PATCH] animation fuckery

---
 flake.nix                                     |  1 +
 .../home/niri/shaders/glitch-open.frag        | 39 +++++++++++++++++++
 modules/desktop/home/niri/style.nix           |  6 +++
 3 files changed, 46 insertions(+)
 create mode 100644 modules/desktop/home/niri/shaders/glitch-open.frag

diff --git a/flake.nix b/flake.nix
index 1dd871f..c9ca4dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -65,6 +65,7 @@
         buildInputs = [
           rs-toolchain
           pkgs.pkg-config
+          pkgs.glsl_analyzer
           pkgs.openssl
         ];
       };
diff --git a/modules/desktop/home/niri/shaders/glitch-open.frag b/modules/desktop/home/niri/shaders/glitch-open.frag
new file mode 100644
index 0000000..4682dd1
--- /dev/null
+++ b/modules/desktop/home/niri/shaders/glitch-open.frag
@@ -0,0 +1,39 @@
+float random(vec2 st) {
+    return fract(sin(dot(st.xy, vec2(12.9898, 78.233))) * 43758.5453123);
+}
+
+float grid(vec2 c) {
+    if (mod((c.s * 512.) + random(c * niri_clamped_progress), 8.) >= 7.|| mod((c.t * 512.) + random(c * niri_clamped_progress), 8.) >= 7.) return 0.;
+    else return 1.;
+}
+
+vec3 grid_colored(vec2 coords, vec3 col1, vec3 col2) {
+    return mix(col1, col2, grid(coords));
+}
+
+vec4 gen_px_squares(vec2 coords, vec4 color) {
+    vec2 coords_ = coords.xy;
+    coords = ceil(coords * 32.) / 32.;
+    float p = niri_clamped_progress;
+
+    float mix_alpha =
+        1. - clamp((p - length(coords)) * 3.0, 0.0, 1.0);
+    // vec4 blue = vec4(0.3568, 0.8078, 0.9803, color.a);
+    vec3 blue = vec3(0.552, 0.631, 1.);
+    vec3 dblue = vec3(0.419, 0.482, 0.839);
+
+    if (color.a != 0. && p * p >= dot(coords, coords))
+        return mix(color, vec4(grid_colored(coords_, dblue, blue), color.a), mix_alpha * 0.5);
+    else return vec4(0.);
+}
+
+vec4 open_color(vec3 coords_geo, vec3 size_geo) {
+    vec3 coords_tex = niri_geo_to_tex * coords_geo;
+    vec4 color = texture2D(niri_tex, coords_tex.st);
+
+    vec2 coords = (coords_geo.xy - vec2(0.5, 0.5)) * size_geo.xy * 2.0;
+    coords = coords / length(size_geo.xy);
+
+    return gen_px_squares(coords, color);
+    // return vec4(vec3(grid(coords)),1.);
+}
diff --git a/modules/desktop/home/niri/style.nix b/modules/desktop/home/niri/style.nix
index 2cee326..93731f0 100644
--- a/modules/desktop/home/niri/style.nix
+++ b/modules/desktop/home/niri/style.nix
@@ -10,6 +10,12 @@
       hide-after-inactive-ms = 10000;
     };
 
+    animations.window-open.easing = {
+      curve = "linear";
+      duration-ms = 350;
+    };
+    animations.shaders.window-open = builtins.readFile ./shaders/glitch-open.frag;
+
     layout = {
       gaps = 15;
       focus-ring.enable = false;