lock screen: threat vignette + chromatic aberration on failed auth, heartbeat pulse at 3+ fails

shell/lock/LockAuth.qml

@@ -12,6 +12,7 @@ QtObject {
     property string state: ""
     property string message: ""
     property string buffer: ""
+    property int failCount: 0
 
     signal unlockRequested
     signal authFailed
@@ -58,6 +59,7 @@ QtObject {
                 root.message = "Wrong password";
             }
 
+            root.failCount++;
             root.authFailed();
             _stateReset.restart();
         }
@@ -85,6 +87,7 @@ QtObject {
                 root.buffer = "";
                 root.state = "";
                 root.message = "";
+                root.failCount = 0;
             }
         }
     }

shell/lock/LockSurface.qml

@@ -15,70 +15,172 @@ WlSessionLockSurface {
 
     property real _unlockFade: 1
 
-    // Solid background - WlSessionLockSurface.color can be unreliable with
-    // Wayland compositors, so paint an explicit opaque rect to prevent the
-    // compositor fallback color (niri red) from bleeding through.
-    Rectangle {
-        anchors.fill: parent
-        color: S.Theme.base00
-    }
+    // Threat level: 0.0-1.0 based on fail count (5 fails = max)
+    readonly property real _threat: Math.min(1.0, root.auth.failCount / 5)
+    property real _heartbeat: 0
 
-    // Clear desktop screenshot from ScreenshotService - visible immediately.
-    // Hidden when reducedMotion (power saver) since the reveal shader and hex
-    // wave won't animate, leaving an unblurred screenshot visible.
-    Image {
-        anchors.fill: parent
-        source: S.ScreenshotService.get(root.screen?.name ?? "")
-        visible: (S.Modules.lock.screenshot ?? true) && source !== "" && !S.Theme.reducedMotion
-        opacity: _unlockFade
-        fillMode: Image.PreserveAspectCrop
-    }
-
-    // Overlay group: blur + hexes, revealed per-pixel by wave position
+    // All visual content wrapped for threat shader
     Item {
-        id: _overlay
+        id: _visual
         anchors.fill: parent
-        opacity: _unlockFade
 
-        property bool _revealed: false
-        onVisibleChanged: _revealed = false
-
-        layer.enabled: !_revealed
+        layer.enabled: root._threat > 0
         layer.effect: ShaderEffect {
-            property real uPhase: _hexWave.wavePhase
-            property real uWidth: root.width
-            fragmentShader: Quickshell.shellPath("modules/reveal_mask.frag.qsb")
-
-            onUPhaseChanged: {
-                if (!_overlay._revealed && uPhase >= _overlay.width)
-                    Qt.callLater(() => {
-                        _overlay._revealed = true;
-                    });
-            }
+            property real uThreat: root._threat
+            property real uPulse: root._heartbeat
+            property color uColor: S.Theme.base08
+            fragmentShader: Quickshell.shellPath("modules/lock_threat.frag.qsb")
         }
 
-        // Blurred screenshot
+        // Solid background - WlSessionLockSurface.color can be unreliable with
+        // Wayland compositors, so paint an explicit opaque rect to prevent the
+        // compositor fallback color (niri red) from bleeding through.
+        Rectangle {
+            anchors.fill: parent
+            color: S.Theme.base00
+        }
+
+        // Clear desktop screenshot from ScreenshotService - visible immediately.
+        // Hidden when reducedMotion (power saver) since the reveal shader and hex
+        // wave won't animate, leaving an unblurred screenshot visible.
         Image {
             anchors.fill: parent
             source: S.ScreenshotService.get(root.screen?.name ?? "")
             visible: (S.Modules.lock.screenshot ?? true) && source !== "" && !S.Theme.reducedMotion
+            opacity: _unlockFade
             fillMode: Image.PreserveAspectCrop
+        }
 
-            layer.enabled: true
-            layer.effect: MultiEffect {
-                autoPaddingEnabled: false
-                blurEnabled: true
-                blur: 1
-                blurMax: 64
+        // Overlay group: blur + hexes, revealed per-pixel by wave position
+        Item {
+            id: _overlay
+            anchors.fill: parent
+            opacity: _unlockFade
+
+            property bool _revealed: false
+            onVisibleChanged: _revealed = false
+
+            layer.enabled: !_revealed
+            layer.effect: ShaderEffect {
+                property real uPhase: _hexWave.wavePhase
+                property real uWidth: root.width
+                fragmentShader: Quickshell.shellPath("modules/reveal_mask.frag.qsb")
+
+                onUPhaseChanged: {
+                    if (!_overlay._revealed && uPhase >= _overlay.width)
+                        Qt.callLater(() => {
+                            _overlay._revealed = true;
+                        });
+                }
+            }
+
+            // Blurred screenshot
+            Image {
+                anchors.fill: parent
+                source: S.ScreenshotService.get(root.screen?.name ?? "")
+                visible: (S.Modules.lock.screenshot ?? true) && source !== "" && !S.Theme.reducedMotion
+                fillMode: Image.PreserveAspectCrop
+
+                layer.enabled: true
+                layer.effect: MultiEffect {
+                    autoPaddingEnabled: false
+                    blurEnabled: true
+                    blur: 1
+                    blurMax: 64
+                }
+            }
+
+            // Hex wave
+            C.HexWaveBackground {
+                id: _hexWave
+                anchors.fill: parent
+                running: root.lock.secure
+                opacity: 0.4
             }
         }
 
-        // Hex wave
-        C.HexWaveBackground {
-            id: _hexWave
-            anchors.fill: parent
-            running: root.lock.secure
-            opacity: 0.4
+        // Clock - rotated, left-aligned, flies in with wave
+        LockClock {
+            id: _clockItem
+            anchors.left: parent.left
+            anchors.leftMargin: 48
+            anchors.top: parent.top
+            anchors.bottom: parent.bottom
+            screenHeight: root.height
+            wavePhase: _hexWave.wavePhase
+            unlockFade: root._unlockFade
+        }
+
+        // Center content - password dead center, error below
+        Item {
+            id: content
+            anchors.centerIn: parent
+            width: 320
+            height: _lockInput.height
+
+            NumberAnimation on opacity {
+                from: 0
+                to: 1
+                duration: 300
+                easing.type: Easing.OutCubic
+            }
+            NumberAnimation on scale {
+                from: 0.9
+                to: 1
+                duration: 300
+                easing.type: Easing.OutCubic
+            }
+
+            // Password input - anchored at center
+            LockInput {
+                id: _lockInput
+                anchors.horizontalCenter: parent.horizontalCenter
+                width: 280
+                buffer: root.auth.buffer
+                state: root.auth.state
+            }
+
+            // Error message - fixed position below password, never shifts layout
+            Text {
+                anchors.horizontalCenter: parent.horizontalCenter
+                anchors.top: _lockInput.bottom
+                anchors.topMargin: 16
+                text: root.auth.message
+                color: S.Theme.base08
+                font.pixelSize: S.Theme.fontSize - 1
+                font.family: S.Theme.fontFamily
+                opacity: root.auth.message ? 1 : 0
+
+                Behavior on opacity {
+                    NumberAnimation {
+                        duration: 200
+                    }
+                }
+            }
+        }
+
+        // Fail counter - above password field
+        Text {
+            anchors.bottom: content.top
+            anchors.bottomMargin: 24
+            anchors.horizontalCenter: parent.horizontalCenter
+            visible: root.auth.failCount > 0
+            text: root.auth.failCount + (root.auth.failCount === 1 ? " failed attempt" : " failed attempts")
+            color: S.Theme.base08
+            opacity: Math.max(0.4, root._threat)
+            font.pixelSize: S.Theme.fontSize - 2
+            font.family: S.Theme.fontFamily
+        }
+
+        // Right column - widgets, fly in when wave exits screen
+        LockWidgets {
+            id: _widgetCol
+            anchors.right: parent.right
+            anchors.rightMargin: 48
+            anchors.verticalCenter: parent.verticalCenter
+            wavePhase: _hexWave.wavePhase
+            screenWidth: root.width
+            unlockFade: root._unlockFade
         }
     }
 
@@ -112,77 +214,6 @@ WlSessionLockSurface {
         }
     }
 
-    // Clock - rotated, left-aligned, flies in with wave
-    LockClock {
-        id: _clockItem
-        anchors.left: parent.left
-        anchors.leftMargin: 48
-        anchors.top: parent.top
-        anchors.bottom: parent.bottom
-        screenHeight: root.height
-        wavePhase: _hexWave.wavePhase
-        unlockFade: root._unlockFade
-    }
-
-    // Center content - password dead center, error below
-    Item {
-        id: content
-        anchors.centerIn: parent
-        width: 320
-        height: _lockInput.height
-
-        NumberAnimation on opacity {
-            from: 0
-            to: 1
-            duration: 300
-            easing.type: Easing.OutCubic
-        }
-        NumberAnimation on scale {
-            from: 0.9
-            to: 1
-            duration: 300
-            easing.type: Easing.OutCubic
-        }
-
-        // Password input - anchored at center
-        LockInput {
-            id: _lockInput
-            anchors.horizontalCenter: parent.horizontalCenter
-            width: 280
-            buffer: root.auth.buffer
-            state: root.auth.state
-        }
-
-        // Error message - fixed position below password, never shifts layout
-        Text {
-            anchors.horizontalCenter: parent.horizontalCenter
-            anchors.top: _lockInput.bottom
-            anchors.topMargin: 16
-            text: root.auth.message
-            color: S.Theme.base08
-            font.pixelSize: S.Theme.fontSize - 1
-            font.family: S.Theme.fontFamily
-            opacity: root.auth.message ? 1 : 0
-
-            Behavior on opacity {
-                NumberAnimation {
-                    duration: 200
-                }
-            }
-        }
-    }
-
-    // Right column - widgets, fly in when wave exits screen
-    LockWidgets {
-        id: _widgetCol
-        anchors.right: parent.right
-        anchors.rightMargin: 48
-        anchors.verticalCenter: parent.verticalCenter
-        wavePhase: _hexWave.wavePhase
-        screenWidth: root.width
-        unlockFade: root._unlockFade
-    }
-
     onVisibleChanged: {
         if (visible)
             _keyInput.forceActiveFocus();
@@ -286,6 +317,52 @@ WlSessionLockSurface {
         }
     }
 
+    // Heartbeat pulse - starts at fail 3, accelerates each fail
+    SequentialAnimation {
+        id: _heartbeatAnim
+        loops: Animation.Infinite
+        running: root.auth.failCount >= 3 && root.lock.secure
+
+        // Systole (sharp spike)
+        NumberAnimation {
+            target: root
+            property: "_heartbeat"
+            from: 0
+            to: 1
+            duration: 80
+            easing.type: Easing.OutQuad
+        }
+        NumberAnimation {
+            target: root
+            property: "_heartbeat"
+            to: 0.15
+            duration: 100
+            easing.type: Easing.InQuad
+        }
+        // Diastole (smaller bump)
+        NumberAnimation {
+            target: root
+            property: "_heartbeat"
+            to: 0.5
+            duration: 80
+            easing.type: Easing.OutQuad
+        }
+        NumberAnimation {
+            target: root
+            property: "_heartbeat"
+            to: 0
+            duration: 120
+            easing.type: Easing.InQuad
+        }
+        // Pause between beats - shorter as fails mount
+        PauseAnimation {
+            duration: Math.max(200, 800 - (root.auth.failCount - 3) * 150)
+        }
+
+        onRunningChanged: if (!running)
+            root._heartbeat = 0
+    }
+
     // Screen corners - session lock surfaces render above all layer-shell,
     // so the bar's ScreenCorners aren't visible. Draw our own.
     component LockCorner: Canvas {

shell/modules/lock_threat.frag

@@ -0,0 +1,52 @@
+#version 440
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 qt_Matrix;
+    float qt_Opacity;
+    // 0.0 = no threat, 1.0 = max lockout
+    float uThreat;
+    // 0.0-1.0 heartbeat pulse (0 when inactive)
+    float uPulse;
+    // accent/threat color
+    vec4 uColor;
+};
+
+layout(binding = 1) uniform sampler2D source;
+
+void main() {
+    vec2 uv = qt_TexCoord0;
+    float threat = clamp(uThreat, 0.0, 1.0);
+    float pulse = clamp(uPulse, 0.0, 1.0);
+
+    // Combined intensity: base threat + heartbeat spike
+    float intensity = threat + pulse * threat * 0.4;
+
+    // Chromatic aberration - RGB channel split increasing with threat
+    float aberration = intensity * 0.008;
+    float r = texture(source, uv + vec2(aberration, 0.0)).r;
+    float g = texture(source, uv).g;
+    float b = texture(source, uv - vec2(aberration, 0.0)).b;
+    float a = texture(source, uv).a;
+    vec4 tex = vec4(r, g, b, a);
+
+    // Vignette - radial darkening from edges, creeping inward with threat
+    vec2 center = uv - 0.5;
+    float dist = length(center * vec2(1.0, 0.7)); // wider horizontally
+    // Inner edge shrinks as threat rises (0.7 -> 0.25)
+    float vigInner = mix(0.7, 0.25, intensity);
+    // Outer edge also shrinks (1.0 -> 0.6)
+    float vigOuter = mix(1.0, 0.6, intensity);
+    float vig = smoothstep(vigInner, vigOuter, dist);
+
+    // Red tint on the vignette area
+    vec3 threatColor = uColor.rgb;
+    vec3 tinted = mix(tex.rgb, threatColor * 0.15, vig * intensity);
+
+    // Darken edges
+    tinted *= 1.0 - vig * intensity * 0.7;
+
+    fragColor = vec4(tinted, tex.a) * qt_Opacity;
+}