add anti-flashbang using shader

dots/.config/quickshell/ii/modules/common/models/quickToggles/AntiFlashbangToggle.qml

@@ -8,10 +8,10 @@ QuickToggleModel {
     name: Translation.tr("Anti-flashbang")
     tooltipText: Translation.tr("Anti-flashbang")
     icon: "flash_off"
-    toggled: Config.options.light.antiFlashbang.enable
+    toggled: HyprlandAntiFlashbangShader.enabled
 
     mainAction: () => {
-        Config.options.light.antiFlashbang.enable = !Config.options.light.antiFlashbang.enable;
+        HyprlandAntiFlashbangShader.toggle()
     }
     hasMenu: true
 }

dots/.config/quickshell/ii/modules/ii/sidebarRight/nightLight/NightLightDialog.qml

@@ -42,7 +42,7 @@ WindowDialog {
                 right: parent.right
             }
             iconSize: Appearance.font.pixelSize.larger
-            buttonIcon: "lightbulb"
+            buttonIcon: "check"
             text: Translation.tr("Enable now")
             checked: Hyprsunset.active
             onCheckedChanged: {
@@ -102,14 +102,32 @@ WindowDialog {
                 right: parent.right
             }
             iconSize: Appearance.font.pixelSize.larger
-            buttonIcon: "flash_off"
-            text: Translation.tr("Enable")
+            buttonIcon: "filter"
+            text: Translation.tr("Content adjustment")
+            checked: HyprlandAntiFlashbangShader.enabled
+            onCheckedChanged: {
+                if (checked) HyprlandAntiFlashbangShader.enable()
+                else HyprlandAntiFlashbangShader.disable()
+            }
+            StyledToolTip {
+                text: Translation.tr("<b>Dims screen content</b> as needed.<br><br>Pros: Immediately responsive<br>Cons: Expensive and can hurt color accuracy<br><br><i>Uses a Hyprland screen shader</i>")
+            }
+        }
+
+        ConfigSwitch {
+            anchors {
+                left: parent.left
+                right: parent.right
+            }
+            iconSize: Appearance.font.pixelSize.larger
+            buttonIcon: "light_mode"
+            text: Translation.tr("Brightness adjustment")
             checked: Config.options.light.antiFlashbang.enable
             onCheckedChanged: {
                 Config.options.light.antiFlashbang.enable = checked;
             }
             StyledToolTip {
-                text: Translation.tr("Example use case: eroge on one workspace, dark Discord window on another")
+                text: Translation.tr("Adapts the <b>display (physical screen) brightness</b><br><br>Pros: Less expensive, retains colors<br>Cons: Not immediately responsive<br><br><i>Adjusts display brightness after each Hyprland IPC event</i>")
             }
         }
     }

dots/.config/quickshell/ii/services/HyprlandAntiFlashbangShader.qml

@@ -0,0 +1,38 @@
+pragma Singleton
+pragma ComponentBehavior: Bound
+
+import QtQuick
+import Quickshell
+
+import qs.modules.common.models.hyprland
+
+Singleton {
+    id: root
+
+    readonly property string shaderPath: Quickshell.shellPath("services/hyprlandAntiFlashbangShader/anti-flashbang.glsl")
+    property bool enabled: confOpt.value == shaderPath
+
+    function enable() {
+        HyprlandConfig.setMany({
+            "decoration:screen_shader": root.shaderPath,
+            "debug:damage_tracking": 1, // Turn off dmg tracking to prevent weird flashes. 1 = monitor only
+        });
+    }
+
+    function disable() {
+        HyprlandConfig.resetMany([
+            "decoration:screen_shader",
+            "debug:damage_tracking"
+        ]);
+    }
+
+    function toggle() {
+        if (root.enabled) disable()
+        else enable()
+    }
+    
+    HyprlandConfigOption {
+        id: confOpt
+        key: "decoration:screen_shader"
+    }
+}

dots/.config/quickshell/ii/services/hyprlandAntiFlashbangShader/anti-flashbang.glsl

@@ -0,0 +1,47 @@
+#version 300 es
+precision highp float;
+
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 fragColor;
+
+float overlayOpacityForBrightness(float x) {
+    // Note: range 0 to 1
+    
+    // Will a fancy curve help?... I'll have to experiment more at night
+    // float y = pow(x, 2.0) * 0.75;
+    // float y = (1.0 - exp(-x))*1.15;
+    // float y = (1.0 - exp(-pow((x-0.15), 0.6)))*1.18;
+    float y = x*0.75;
+
+    return min(max(y, 0.001), 1.0);
+}
+
+void main() {
+    // 1. Get the current pixel color
+    vec4 pixColor = texture(tex, v_texcoord);
+
+    // 2. Calculate average screen brightness
+    vec3 totalRGB = vec3(0.0);
+    float samples = 0.0;
+    
+    // We use a nested loop to create a 10x10 grid (100 samples)
+    // This is dense enough to catch small icons/text but light enough to run fast.
+    for(float x = 0.05; x < 1.0; x += 0.1) {
+        for(float y = 0.05; y < 1.0; y += 0.1) {
+            totalRGB += texture(tex, vec2(x, y)).rgb;
+            samples++;
+        }
+    }
+    
+    vec3 avgColor = totalRGB / samples;
+    float globalBrightness = dot(avgColor, vec3(0.2126, 0.7152, 0.0722));
+
+    // 3. Get the specific opacity for this brightness level
+    float opacity = overlayOpacityForBrightness(globalBrightness);
+
+    // 4. Apply the "black overlay" effect
+    vec3 outColor = mix(pixColor.rgb, vec3(0.0), opacity);
+
+    fragColor = vec4(outColor, pixColor.a);
+}