niri: add custom animations for window opening and resizing

Signed-off-by: faukah <fau@faukah.com>
Change-Id: I6a6a69647336104b507fbba5b82de23684e60291

modules/wms/niri/window-close.glsl

@@ -0,0 +1,24 @@
+vec4 fall_and_rotate(vec3 coords_geo, vec3 size_geo) {
+    float progress = niri_clamped_progress * niri_clamped_progress;
+    vec2 coords = (coords_geo.xy - vec2(0.5, 1.0)) * size_geo.xy;
+
+    coords.y -= progress * 1440.0;
+    float random = (niri_random_seed - 0.5) / 2.0;
+    random = sign(random) - random;
+
+    float max_angle = 0.5 * random;
+    float angle = progress * max_angle;
+    mat2 rotate = mat2(cos(angle), -sin(angle), sin(angle), cos(angle));
+
+    coords = rotate * coords;
+    coords_geo = vec3(coords / size_geo.xy + vec2(0.5, 1.0), 1.0);
+
+    vec3 coords_tex = niri_geo_to_tex * coords_geo;
+    vec4 color = texture2D(niri_tex, coords_tex.st);
+
+    return color;
+}
+
+vec4 close_color(vec3 coords_geo, vec3 size_geo) {
+    return fall_and_rotate(coords_geo, size_geo);
+}