Add Glitch shade

1 files changed, 78 insertions, 0 deletions

diff --git a/config/picom/shaders/matrix_dissolve.glsl b/config/picom/shaders/matrix_dissolve.glsl
new file mode 100644
index 0000000..aaa6c4b
--- /dev/null
+++ b/config/picom/shaders/matrix_dissolve.glsl
@@ -0,0 +1,78 @@
+#version 330
+
+in vec2 texcoord;             // texture coordinate of the fragment
+
+uniform sampler2D tex;        // texture of the window
+
+
+ivec2 window_size = textureSize(tex, 0); // Size of the window
+ivec2 window_center = ivec2(window_size.x/2, window_size.y/2);
+
+/*
+These shaders use a sorta hacky way to use the changing
+window opacity you might set on picom.conf animation rules
+to perform animations.
+
+Basically, when a window get's mapped, we make it's alpha 
+go from 0 to 1, so, using the default_post_processing to get that alpha
+we can get a variable going from 0 (start of mapping animation)
+to 1 (end of mapping animation)
+
+You can also set up your alpha value to go from 1 to 0 in picom when
+a window is closed, effectively reversing the animations described here
+*/
+
+// Default window post-processing:
+// 1) invert color
+// 2) opacity / transparency
+// 3) max-brightness clamping
+// 4) rounded corners
+vec4 default_post_processing(vec4 c);
+// Pseudo-random function
+float random(vec2 st) {
+    return fract(sin(dot(st.xy, vec2(12.9898,78.233))) * 43758.5453123);
+}
+
+// Creates vertical scanlines
+float scanline(vec2 uv, float time) {
+    return sin(uv.y * 200.0 + time * 10.0) * 0.5 + 0.5;
+}
+
+vec4 anim(float time) {
+    vec2 uv = texcoord / vec2(window_size);
+    
+    // Adjust square size (smaller number = more squares)
+    float square_size = 4.0;
+    
+    // Calculate grid position
+    vec2 square_pos = floor(texcoord / square_size);
+    
+    // Generate random value for this square
+    float index = random(square_pos);
+    
+    // Get original color
+    vec4 c = texelFetch(tex, ivec2(texcoord), 0);
+    
+    // Create threshold for dissolve
+    float threshold = (1.0 - time) * 1.2; // The 1.2 creates a slight overlap
+    
+    // If the random index is greater than our threshold, make pixel transparent
+    if (index > threshold) {
+        c.a = 0.0;
+    }
+    
+    return c;
+}
+
+// Default window shader:
+// 1) fetch the specified pixel
+// 2) apply default post-processing
+vec4 window_shader() {
+    vec4 c = texelFetch(tex, ivec2(texcoord), 0);
+    c = default_post_processing(c);
+    if (c.w != 1.0)
+    {
+        c = anim(1.0-c.w);
+    }
+    return default_post_processing(c);
+}