Improve highdpi support.

new ebuild available for 1.1.0

README.md

@@ -13,18 +13,18 @@ It uses the QML port of qtermwidget (Konsole) developed by me: https://github.co
 This terminal emulator works under Linux and macOS and requires Qt 5.2 or higher.
 
 ## Screenshots
-![Image](<http://i.imgur.com/I6wq1cC.png>)
-![Image](<http://i.imgur.com/12EqlpL.png>)
-![Image](<http://i.imgur.com/Lx0acQz.jpg>)
+![Image](<https://i.imgur.com/TNumkDn.png>)
+![Image](<https://i.imgur.com/hfjWOM4.png>)
+![Image](<https://i.imgur.com/GYRDPzJ.jpg>)
 
-## Get cool-retro-term
-You can either build cool-retro-term yourself (see below) or walk the easy way and install one of these packages:
+## Install
+Walk the easy way and install cool-retro-term using one of these convenient packages:
 
-Fedora has the `cool-retro-term` in the offcial repositories. All you have to do is `sudo dnf install cool-retro-term`.
+**Fedora** has the `cool-retro-term` in the offcial repositories. All you have to do is `sudo dnf install cool-retro-term`.
 
-Users of openSUSE can grab a package from [Open Build Service](http://software.opensuse.org/package/cool-retro-term).
+Users of **openSUSE** can grab a package from [Open Build Service](http://software.opensuse.org/package/cool-retro-term).
 
-Arch users can install this [package](https://aur.archlinux.org/packages/cool-retro-term-git/) directly via the [AUR](https://aur.archlinux.org):
+**Arch** users can install this [package](https://aur.archlinux.org/packages/cool-retro-term-git/) directly via the [AUR](https://aur.archlinux.org):
 
     yaourt -S aur/cool-retro-term-git
 
@@ -34,25 +34,27 @@ or use:
 
 to install precompiled from community repository.
 
-Gentoo users can now install the second release "1.0.1" from a 3rd-party repository preferably via layman:
+**Gentoo** users can now install the third release "1.1.0" from a 3rd-party repository preferably via layman:
 
     USE="git" emerge app-portage/layman
     wget https://www.gerczei.eu/files/gerczei.xml -O /etc/layman/overlays/gerczei.xml
     layman -f -a qt -a gerczei # those who've added the repo before 27/08/17 should remove, update and add it again as its source has changed
-    ACCEPT_KEYWORDS="~*" emerge =x11-terms/cool-retro-term-1.0.1::gerczei
+    ACCEPT_KEYWORDS="~*" emerge =x11-terms/cool-retro-term-1.1.0::gerczei
 
 The live ebuild (version 9999-r1) tracking the bleeding-edge WIP codebase also remains available.
 
 A word of warning: USE flags and keywords are to be added to portage's configuration files and every emerge operation should be executed with '-p' (short option for --pretend) appended to the command line first as per best practice!
 
-Ubuntu users of 14.04 LTS (Trusty) up to 15.10 (Wily) can use [this PPA](https://launchpad.net/~bugs-launchpad-net-falkensweb).
+Users of **Ubuntu 14.04 LTS (Trusty) up to 15.10 (Wily)** can use [this PPA](https://launchpad.net/~bugs-launchpad-net-falkensweb).
 
-Ubuntu 17.10 can use [this PPA](https://launchpad.net/%7Evantuz/+archive/ubuntu/cool-retro-term)
+**Ubuntu 17.10** can use [this PPA](https://launchpad.net/%7Evantuz/+archive/ubuntu/cool-retro-term)
 
-macOS users can grab the latest dmg from the release page: https://github.com/Swordfish90/cool-retro-term/releases
+**macOS** users can grab the latest dmg from the release page: https://github.com/Swordfish90/cool-retro-term/releases
 
 ## Build instructions (Linux)
 
+Build cool-retro-term yourself, you know, the retro way.
+
 ## Dependencies
 Make sure to install these first.
 

app/qml/ApplicationSettings.qml

@@ -33,6 +33,9 @@ QtObject{
     readonly property real minimumFontScaling: 0.25
     readonly property real maximumFontScaling: 2.50
 
+    readonly property real minBurnInFadeTime: 160
+    readonly property real maxBurnInFadeTime: 1600
+
     // GENERAL SETTINGS ///////////////////////////////////////////////////////
 
     property int x: 100
@@ -52,7 +55,9 @@ QtObject{
     property bool verbose: false
 
     property real bloomQuality: 0.5
+
     property real burnInQuality: 0.5
+    property bool useFastBurnIn: Qt.platform.os === "osx" ? false : true
 
     onWindowScalingChanged: handleFontChanged();
 
@@ -88,6 +93,9 @@ QtObject{
 
     property real rbgShift: 0.0
 
+    property real _margin: 0.5
+    property real margin: Utils.lint(1.0, 20.0, _margin)
+
     readonly property int no_rasterization: 0
     readonly property int scanline_rasterization: 1
     readonly property int pixel_rasterization: 2
@@ -199,7 +207,8 @@ QtObject{
             bloomQuality: bloomQuality,
             burnInQuality: burnInQuality,
             useCustomCommand: useCustomCommand,
-            customCommand: customCommand
+            customCommand: customCommand,
+            useFastBurnIn: useFastBurnIn
         }
         return stringify(settings);
     }
@@ -225,7 +234,8 @@ QtObject{
             ambientLight: ambientLight,
             windowOpacity: windowOpacity,
             fontName: fontNames[rasterization],
-            fontWidth: fontWidth
+            fontWidth: fontWidth,
+            margin: _margin
         }
         return settings;
     }
@@ -284,6 +294,8 @@ QtObject{
 
         useCustomCommand = settings.useCustomCommand !== undefined ? settings.useCustomCommand : useCustomCommand
         customCommand = settings.customCommand !== undefined ? settings.customCommand : customCommand
+
+        useFastBurnIn = settings.useFastBurnIn !== undefined ? settings.useFastBurnIn : useFastBurnIn;
     }
 
     function loadProfileString(profileString){
@@ -317,6 +329,8 @@ QtObject{
         fontNames[rasterization] = settings.fontName !== undefined ? settings.fontName : fontNames[rasterization];
         fontWidth = settings.fontWidth !== undefined ? settings.fontWidth : fontWidth;
 
+        _margin = settings.margin !== undefined ? settings.margin : _margin;
+
         handleFontChanged();
     }
 
@@ -386,7 +400,8 @@ QtObject{
                   "saturationColor": 0.2483,
                   "screenCurvature": 0.3,
                   "staticNoise": 0.1198,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -413,7 +428,8 @@ QtObject{
                   "saturationColor": 0.0,
                   "screenCurvature": 0.3,
                   "staticNoise": 0.1198,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -440,7 +456,8 @@ QtObject{
                   "saturationColor": 0.5,
                   "screenCurvature": 0.3,
                   "staticNoise": 0.15,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -467,7 +484,8 @@ QtObject{
                   "saturationColor": 0,
                   "screenCurvature": 0,
                   "staticNoise": 0.15,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -494,7 +512,8 @@ QtObject{
                   "saturationColor": 0,
                   "screenCurvature": 0.5,
                   "staticNoise": 0.099,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -521,7 +540,8 @@ QtObject{
                   "saturationColor": 0,
                   "screenCurvature": 0.5,
                   "staticNoise": 0.2969,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -548,7 +568,8 @@ QtObject{
                   "saturationColor": 0,
                   "screenCurvature": 0.4,
                   "staticNoise": 0.0503,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -575,7 +596,8 @@ QtObject{
                   "saturationColor": 0,
                   "screenCurvature": 0.2,
                   "staticNoise": 0,
-                  "windowOpacity": 1
+                  "windowOpacity": 1,
+                  "margin": 0.5
                 }'
             builtin: true
         }
@@ -602,7 +624,8 @@ QtObject{
                   "saturationColor": 0.4983,
                   "screenCurvature": 0,
                   "staticNoise": 0.0955,
-                  "windowOpacity": 0.7
+                  "windowOpacity": 0.7,
+                  "margin": 0.1
                 }'
             builtin: true
         }

app/qml/BurnInEffect.qml

@@ -13,10 +13,12 @@ Loader {
     property real delay: (1.0 / appSettings.fps) * 1000
     property real burnIn: appSettings.burnIn
     property real burnInFadeTime: 1 / Utils.lint(_minBurnInFadeTime, _maxBurnInFadeTime, burnIn)
-    property real _minBurnInFadeTime: 160
-    property real _maxBurnInFadeTime: 1600
+    property real _minBurnInFadeTime: appSettings.minBurnInFadeTime
+    property real _maxBurnInFadeTime: appSettings.maxBurnInFadeTime
 
-    active: appSettings.burnIn !== 0
+    active: appSettings.useFastBurnIn && appSettings.burnIn !== 0
+
+    anchors.fill: parent
 
     function completelyUpdate() {
         prevLastUpdate = lastUpdate;
@@ -33,16 +35,6 @@ Loader {
     sourceComponent: Item {
         property alias source: burnInEffectSource
 
-        property int burnInScaling: scaleTexture * appSettings.burnInQuality
-
-        width: appSettings.lowResolutionFont
-               ? kterminal.width * Math.max(1, burnInScaling)
-               : kterminal.width * scaleTexture * appSettings.burnInQuality
-
-        height: appSettings.lowResolutionFont
-                ? kterminal.height * Math.max(1, burnInScaling)
-                : kterminal.height * scaleTexture * appSettings.burnInQuality
-
         ShaderEffectSource {
             id: burnInEffectSource
 
@@ -52,13 +44,10 @@ Loader {
             live: false
             recursive: true
             hideSource: true
-            wrapMode: kterminalSource.wrapMode
+            wrapMode: ShaderEffectSource.ClampToEdge
 
             format: ShaderEffectSource.RGBA
-
-            // Enabling smooth with a low burnInQuality causes bad artifacts because the FBO
-            // has different values when it's read back. This lowers the quality, but makes it more consistent.
-            smooth: appSettings.burnInQuality === 1.0
+            smooth: true
 
             visible: false
 
@@ -91,7 +80,6 @@ Loader {
             property real prevLastUpdate: burnInEffect.prevLastUpdate
 
             anchors.fill: parent
-
             blending: false
 
             fragmentShader:

app/qml/NewTerminalFrame.qml

@@ -3,7 +3,7 @@ import QtQuick 2.0
 import "utils.js" as Utils
 
 ShaderEffect {
-    property color _staticFrameColor: "#dedede"
+    property color _staticFrameColor: "#ffffff"
     property color _backgroundColor: appSettings.backgroundColor
     property color _fontColor: appSettings.fontColor
     property color _lightColor: Utils.mix(_fontColor, _backgroundColor, 0.2)
@@ -13,6 +13,8 @@ ShaderEffect {
     property real screenCurvature: appSettings.screenCurvature * appSettings.screenCurvatureSize
     property real shadowLength: 0.5 * screenCurvature * Utils.lint(0.50, 1.5, _ambientLight)
 
+    property size aadelta: Qt.size(1.0 / width, 1.0 / height)
+
     fragmentShader: "
         #ifdef GL_ES
             precision mediump float;
@@ -22,6 +24,7 @@ ShaderEffect {
         uniform lowp float shadowLength;
         uniform highp float qt_Opacity;
         uniform lowp vec4 frameColor;
+        uniform mediump vec2 aadelta;
 
         varying highp vec2 qt_TexCoord0;
 
@@ -39,6 +42,10 @@ ShaderEffect {
             return min(v.x, v.y);
         }
 
+        float prod2(vec2 v) {
+            return v.x * v.y;
+        }
+
         float sum2(vec2 v) {
             return v.x + v.y;
         }
@@ -51,12 +58,17 @@ ShaderEffect {
             float alpha = 0.0;
 
             float outShadowLength = shadowLength;
+            float inShadowLength = shadowLength * 0.5;
 
             float outShadow = max2(1.0 - smoothstep(vec2(-outShadowLength), vec2(0.0), coords) + smoothstep(vec2(1.0), vec2(1.0 + outShadowLength), coords));
-            outShadow = clamp(0.0, 1.0, outShadow);
-            color += frameColor.rgb * sqrt(outShadow);
-            alpha = sum2(1.0 - step(0.0, coords) + step(1.0, coords));
-            alpha = clamp(alpha, 0.0, 1.0) * mix(1.0, 0.9, sqrt(outShadow));
+            outShadow = clamp(sqrt(outShadow), 0.0, 1.0);
+            color += frameColor.rgb * outShadow;
+            alpha = sum2(1.0 - smoothstep(vec2(0.0), aadelta, coords) + smoothstep(vec2(1.0) - aadelta, vec2(1.0), coords));
+            alpha = clamp(alpha, 0.0, 1.0) * mix(1.0, 0.9, outShadow);
+
+            float inShadow = 1.0 - prod2(smoothstep(0.0, inShadowLength, coords) - smoothstep(1.0 - inShadowLength, 1.0, coords));
+            inShadow = 0.5 * inShadow * inShadow;
+            alpha = max(alpha, inShadow);
 
             gl_FragColor = vec4(color * alpha, alpha);
         }

app/qml/PreprocessedTerminal.qml

@@ -28,11 +28,12 @@ import "utils.js" as Utils
 Item{
     id: terminalContainer
 
-    property size virtualResolution: Qt.size(kterminal.width, kterminal.height)
+    property size virtualResolution: Qt.size(kterminal.totalWidth, kterminal.totalHeight)
     property alias mainTerminal: kterminal
 
     property ShaderEffectSource mainSource: kterminalSource
     property BurnInEffect burnInEffect: burnInEffect
+    property SlowBurnIn slowBurnInEffect: slowBurnInEffect
     property real fontWidth: 1.0
     property real screenScaling: 1.0
     property real scaleTexture: 1.0
@@ -69,8 +70,24 @@ Item{
 
     QMLTermWidget {
         id: kterminal
-        width: Math.floor(parent.width / (screenScaling * fontWidth))
-        height: Math.floor(parent.height / screenScaling)
+
+        property int textureResolutionScale: appSettings.lowResolutionFont ? devicePixelRatio : 1
+        property int margin: appSettings.margin / screenScaling
+        property int totalWidth: Math.floor(parent.width / (screenScaling * fontWidth))
+        property int totalHeight: Math.floor(parent.height / screenScaling)
+
+        property int rawWidth: totalWidth - 2 * margin
+        property int rawHeight: totalHeight - 2 * margin
+
+        textureSize: Qt.size(width / textureResolutionScale, height / textureResolutionScale)
+
+        width: ensureMultiple(rawWidth, devicePixelRatio)
+        height: ensureMultiple(rawHeight, devicePixelRatio)
+
+        /** Ensure size is a multiple of factor. This is needed for pixel perfect scaling on highdpi screens. */
+        function ensureMultiple(size, factor) {
+            return Math.round(size / factor) * factor;
+        }
 
         colorScheme: "cool-retro-term"
 
@@ -167,6 +184,8 @@ Item{
     property alias contextmenu: menuLoader.item
 
     MouseArea{
+        property real margin: appSettings.margin
+
         acceptedButtons: Qt.LeftButton | Qt.MiddleButton | Qt.RightButton
         anchors.fill: parent
         cursorShape: kterminal.terminalUsesMouse ? Qt.ArrowCursor : Qt.IBeamCursor
@@ -200,14 +219,14 @@ Item{
         }
 
         function correctDistortion(x, y){
-            x = x / width;
-            y = y / height;
+            x = (x - margin) / width;
+            y = (y - margin) / height;
 
             var cc = Qt.size(0.5 - x, 0.5 - y);
             var distortion = (cc.height * cc.height + cc.width * cc.width) * appSettings.screenCurvature * appSettings.screenCurvatureSize;
 
-            return Qt.point((x - cc.width  * (1+distortion) * distortion) * kterminal.width,
-                           (y - cc.height * (1+distortion) * distortion) * kterminal.height)
+            return Qt.point((x - cc.width  * (1+distortion) * distortion) * kterminal.totalWidth,
+                           (y - cc.height * (1+distortion) * distortion) * kterminal.totalHeight)
         }
     }
     ShaderEffectSource{
@@ -216,10 +235,30 @@ Item{
         hideSource: true
         wrapMode: ShaderEffectSource.Repeat
         visible: false
-        textureSize: Qt.size(kterminal.width * scaleTexture, kterminal.height * scaleTexture);
+        textureSize: Qt.size(kterminal.totalWidth * scaleTexture, kterminal.totalHeight * scaleTexture)
+        sourceRect: Qt.rect(-kterminal.margin, -kterminal.margin, kterminal.totalWidth, kterminal.totalHeight)
     }
 
-    BurnInEffect {
-        id: burnInEffect
+    Item {
+        id: burnInContainer
+
+        property int burnInScaling: scaleTexture * appSettings.burnInQuality
+
+        width: Math.round(appSettings.lowResolutionFont
+               ? kterminal.totalWidth * Math.max(1, burnInScaling)
+               : kterminal.totalWidth * scaleTexture * appSettings.burnInQuality)
+
+        height: Math.round(appSettings.lowResolutionFont
+                ? kterminal.totalHeight * Math.max(1, burnInScaling)
+                : kterminal.totalHeight * scaleTexture * appSettings.burnInQuality)
+
+
+        BurnInEffect {
+            id: burnInEffect
+        }
+
+        SlowBurnIn {
+            id: slowBurnInEffect
+        }
     }
 }

app/qml/SettingsAdvancedTab.qml

@@ -27,13 +27,48 @@ import "Components"
 Tab{
     ColumnLayout{
         anchors.fill: parent
+
         GroupBox{
-            title: qsTr("General")
+            Layout.fillWidth: true
+            title: qsTr("Command")
+            ColumnLayout {
+                anchors.fill: parent
+                CheckBox{
+                    id: useCustomCommand
+                    text: qsTr("Use custom command instead of shell at startup")
+                    checked: appSettings.useCustomCommand
+                    onCheckedChanged: appSettings.useCustomCommand = checked
+                }
+                // Workaround for QTBUG-31627 for pre 5.3.0
+                Binding{
+                    target: useCustomCommand
+                    property: "checked"
+                    value: appSettings.useCustomCommand
+                }
+                TextField{
+                    id: customCommand
+                    Layout.fillWidth: true
+                    text: appSettings.customCommand
+                    enabled: useCustomCommand.checked
+                    onEditingFinished: appSettings.customCommand = text
+
+                    // Save text even if user forgets to press enter or unfocus
+                    function saveSetting() {
+                        appSettings.customCommand = text;
+                    }
+                    Component.onCompleted: settings_window.closing.connect(saveSetting)
+                }
+            }
+        }
+
+        GroupBox{
+            title: qsTr("Performance")
             Layout.fillWidth: true
             GridLayout{
                 anchors.fill: parent
                 rows: 2
                 columns: 3
+
                 Label{text: qsTr("Effects FPS")}
                 Slider{
                     Layout.fillWidth: true
@@ -52,6 +87,7 @@ Tab{
                         enabled = true;
                     }
                 }
+
                 SizedLabel{text: appSettings.fps !== 0 ? appSettings.fps : qsTr("Max")}
                 Label{text: qsTr("Texture Quality")}
                 Slider{
@@ -67,14 +103,7 @@ Tab{
                     }
                 }
                 SizedLabel{text: Math.round(txtslider.value * 100) + "%"}
-            }
-        }
-        GroupBox{
-            title: qsTr("Bloom")
-            Layout.fillWidth: true
-            GridLayout{
-                id: bloomQualityContainer
-                anchors.fill: parent
+
                 Label{text: qsTr("Bloom Quality")}
                 Slider{
                     Layout.fillWidth: true
@@ -89,14 +118,6 @@ Tab{
                     }
                 }
                 SizedLabel{text: Math.round(bloomSlider.value * 100) + "%"}
-            }
-        }
-        GroupBox{
-            title: qsTr("BurnIn")
-            Layout.fillWidth: true
-            GridLayout{
-                id: blurQualityContainer
-                anchors.fill: parent
 
                 Label{text: qsTr("BurnIn Quality")}
                 Slider{
@@ -112,6 +133,12 @@ Tab{
                     }
                 }
                 SizedLabel{text: Math.round(burnInSlider.value * 100) + "%"}
+                CheckBox{
+                    Layout.columnSpan: 2
+                    text: qsTr("Burnin optimization (Might display timing artifacts)")
+                    checked: appSettings.useFastBurnIn
+                    onCheckedChanged: appSettings.useFastBurnIn = checked
+                }
             }
         }
     }

app/qml/SettingsEffectsTab.qml

@@ -87,29 +87,5 @@ Tab{
                 }
             }
         }
-
-        GroupBox{
-            title: qsTr("Lights")
-            Layout.fillWidth: true
-            GridLayout{
-                anchors.fill: parent
-                columns: 2
-                Label{ text: qsTr("Brightness") }
-                SimpleSlider{
-                    onValueChanged: appSettings.brightness = value
-                    value: appSettings.brightness
-                }
-                Label{ text: qsTr("Contrast") }
-                SimpleSlider{
-                    onValueChanged: appSettings.contrast = value
-                    value: appSettings.contrast
-                }
-                Label{ text: qsTr("Opacity") }
-                SimpleSlider{
-                    onValueChanged: appSettings.windowOpacity = value
-                    value: appSettings.windowOpacity
-                }
-            }
-        }
     }
 }

app/qml/SettingsGeneralTab.qml

@@ -52,7 +52,7 @@ Tab{
                     Layout.fillWidth: false
                     Button{
                         Layout.fillWidth: true
-                        text: qsTr("New")
+                        text: qsTr("Save")
                         onClicked: {
                             insertname.profileName = "";
                             insertname.show()
@@ -164,34 +164,30 @@ Tab{
         }
 
         GroupBox{
+            title: qsTr("Screen")
             Layout.fillWidth: true
-            title: qsTr("Command")
-            ColumnLayout {
+            GridLayout{
                 anchors.fill: parent
-                CheckBox{
-                    id: useCustomCommand
-                    text: qsTr("Use custom command instead of shell at startup")
-                    checked: appSettings.useCustomCommand
-                    onCheckedChanged: appSettings.useCustomCommand = checked
+                columns: 2
+                Label{ text: qsTr("Brightness") }
+                SimpleSlider{
+                    onValueChanged: appSettings.brightness = value
+                    value: appSettings.brightness
                 }
-                // Workaround for QTBUG-31627 for pre 5.3.0
-                Binding{
-                    target: useCustomCommand
-                    property: "checked"
-                    value: appSettings.useCustomCommand
+                Label{ text: qsTr("Contrast") }
+                SimpleSlider{
+                    onValueChanged: appSettings.contrast = value
+                    value: appSettings.contrast
                 }
-                TextField{
-                    id: customCommand
-                    Layout.fillWidth: true
-                    text: appSettings.customCommand
-                    enabled: useCustomCommand.checked
-                    onEditingFinished: appSettings.customCommand = text
-
-                    // Save text even if user forgets to press enter or unfocus
-                    function saveSetting() {
-                        appSettings.customCommand = text;
-                    }
-                    Component.onCompleted: settings_window.closing.connect(saveSetting)
+                Label{ text: qsTr("Margin") }
+                SimpleSlider{
+                    onValueChanged: appSettings._margin = value
+                    value: appSettings._margin
+                }
+                Label{ text: qsTr("Opacity") }
+                SimpleSlider{
+                    onValueChanged: appSettings.windowOpacity = value
+                    value: appSettings.windowOpacity
                 }
             }
         }

app/qml/SettingsWindow.qml

@@ -28,7 +28,7 @@ Window {
     id: settings_window
     title: qsTr("Settings")
     width: 580
-    height: 500
+    height: 400
 
     property int tabmargins: 15
 
@@ -36,27 +36,27 @@ Window {
         id: tabView
         anchors.fill: parent
         anchors.margins: 10
-        SettingsGeneralTab{
+        SettingsGeneralTab {
             id: generalTab
             title: qsTr("General")
             anchors.fill: parent
             anchors.margins: tabmargins
         }
-        SettingsTerminalTab{
+        SettingsTerminalTab {
             id: terminalTab
             title: qsTr("Terminal")
             anchors.fill: parent
             anchors.margins: tabmargins
         }
-        SettingsEffectsTab{
+        SettingsEffectsTab {
             id: effectsTab
             title: qsTr("Effects")
             anchors.fill: parent
             anchors.margins: tabmargins
         }
-        SettingsPerformanceTab{
+        SettingsAdvancedTab {
             id: performanceTab
-            title: qsTr("Performance")
+            title: qsTr("Advanced")
             anchors.fill: parent
             anchors.margins: tabmargins
         }

app/qml/ShaderTerminal.qml

@@ -24,6 +24,7 @@ import QtGraphicalEffects 1.0
 import "utils.js" as Utils
 
 Item {
+    property SlowBurnIn slowBurnInEffect
     property ShaderEffectSource source
     property BurnInEffect burnInEffect
     property ShaderEffectSource bloomSource
@@ -44,6 +45,7 @@ Item {
 
          property ShaderEffectSource screenBuffer: frameBuffer
          property ShaderEffectSource burnInSource: burnInEffect.source
+         property ShaderEffectSource frameSource: terminalFrameLoader.item
 
          property color fontColor: parent.fontColor
          property color backgroundColor: parent.backgroundColor
@@ -52,11 +54,19 @@ Item {
          property real ambientLight: parent.ambientLight
 
          property real flickering: appSettings.flickering
-         property real horizontalSync: appSettings.horizontalSync * 0.5
+         property real horizontalSync: appSettings.horizontalSync
+         property real horizontalSyncStrength: Utils.lint(0.05, 0.35, horizontalSync)
          property real glowingLine: appSettings.glowingLine * 0.2
-         property real burnIn: appSettings.burnIn
+
+         // Fast burnin properties
+         property real burnIn: appSettings.useFastBurnIn ? appSettings.burnIn : 0
          property real burnInLastUpdate: burnInEffect.lastUpdate
          property real burnInTime: burnInEffect.burnInFadeTime
+
+         // Slow burnin properties
+         property real slowBurnIn: appSettings.useFastBurnIn ? 0 : appSettings.burnIn
+         property ShaderEffectSource slowBurnInSource: slowBurnInEffect.source
+
          property real jitter: appSettings.jitter
          property size jitterDisplacement: Qt.size(0.007 * jitter, 0.002 * jitter)
          property real shadowLength: 0.25 * screenCurvature * Utils.lint(0.50, 1.5, ambientLight)
@@ -114,7 +124,7 @@ Item {
                  uniform lowp float flickering;" : "") +
 
              (!fallBack && horizontalSync !== 0.0 ?"
-                 uniform lowp float horizontalSync;
+                 uniform lowp float horizontalSyncStrength;
                  varying lowp float distortionScale;
                  varying lowp float distortionFreq;" : "") +
 
@@ -132,8 +142,8 @@ Item {
                  : "") +
 
                  (!fallBack && horizontalSync !== 0.0 ? "
-                     float randval = horizontalSync - initialNoiseTexel.r;
-                     distortionScale = step(0.0, randval) * randval * horizontalSync;
+                     float randval = horizontalSyncStrength - initialNoiseTexel.r;
+                     distortionScale = step(0.0, randval) * randval * horizontalSyncStrength;
                      distortionFreq = mix(4.0, 40.0, initialNoiseTexel.g);"
                  : "") +
 
@@ -160,6 +170,8 @@ Item {
                  uniform sampler2D burnInSource;
                  uniform highp float burnInLastUpdate;
                  uniform highp float burnInTime;" : "") +
+             (slowBurnIn !== 0 ? "
+                 uniform sampler2D slowBurnInSource;" : "") +
              (staticNoise !== 0 ? "
                  uniform highp float staticNoise;" : "") +
              (((staticNoise !== 0 || jitter !== 0)
@@ -167,7 +179,8 @@ Item {
                  uniform lowp sampler2D noiseSource;
                  uniform highp vec2 scaleNoiseSize;" : "") +
              (screenCurvature !== 0 ? "
-                 uniform highp float screenCurvature;" : "") +
+                 uniform highp float screenCurvature;
+                 uniform lowp sampler2D frameSource;" : "") +
              (glowingLine !== 0 ? "
                  uniform highp float glowingLine;" : "") +
              (chromaColor !== 0 ? "
@@ -178,7 +191,7 @@ Item {
                  uniform lowp float ambientLight;" : "") +
 
              (fallBack && horizontalSync !== 0 ? "
-                 uniform lowp float horizontalSync;" : "") +
+                 uniform lowp float horizontalSyncStrength;" : "") +
              (fallBack && flickering !== 0.0 ?"
                  uniform lowp float flickering;" : "") +
              (!fallBack && flickering !== 0 ? "
@@ -238,8 +251,8 @@ Item {
                      float brightness = 1.0 + (initialNoiseTexel.g - 0.5) * flickering;"
                  : "") +
                  (fallBack && horizontalSync !== 0.0 ? "
-                     float randval = horizontalSync - initialNoiseTexel.r;
-                     float distortionScale = step(0.0, randval) * randval * horizontalSync;
+                     float randval = horizontalSyncStrength - initialNoiseTexel.r;
+                     float distortionScale = step(0.0, randval) * randval * horizontalSyncStrength;
                      float distortionFreq = mix(4.0, 40.0, initialNoiseTexel.g);"
                  : "") +
 
@@ -247,12 +260,9 @@ Item {
                      float noise = staticNoise;" : "") +
 
                  (screenCurvature !== 0 ? "
-                     vec2 curvatureCoords = barrel(qt_TexCoord0, cc);
-                     float staticInScreen = min2(step(0.0, curvatureCoords) - step(1.0, curvatureCoords));
-                     vec2 staticCoords = curvatureCoords;"
+                     vec2 staticCoords = barrel(qt_TexCoord0, cc);"
                  :"
-                     vec2 staticCoords = qt_TexCoord0;
-                     float staticInScreen = 1.0;") +
+                     vec2 staticCoords = qt_TexCoord0;") +
 
                  "vec2 coords = qt_TexCoord0;" +
 
@@ -283,10 +293,7 @@ Item {
                  (glowingLine !== 0 ? "
                      color += randomPass(coords * virtual_resolution) * glowingLine;" : "") +
 
-                 "txt_coords = mix(qt_TexCoord0, txt_coords, staticInScreen);
-                  float inScreen2 = isInScreen(barrel(txt_coords, cc));
-                  vec3 origTxtColor = texture2D(screenBuffer, txt_coords).rgb;
-                  vec3 txt_color = mix(backgroundColor.rgb, origTxtColor, inScreen2);" +
+                 "vec3 txt_color = texture2D(screenBuffer, txt_coords).rgb;" +
 
                  (burnIn !== 0 ? "
                      vec4 txt_blur = texture2D(burnInSource, staticCoords);
@@ -295,6 +302,11 @@ Item {
                      txt_color = max(txt_color, convertWithChroma(burnInColor));"
                  : "") +
 
+                 (slowBurnIn !== 0 ? "
+                     vec4 txt_blur = texture2D(slowBurnInSource, staticCoords);
+                     txt_color = max(txt_color, convertWithChroma(txt_blur.rgb * txt_blur.a));
+                 " : "") +
+
                   "txt_color += fontColor.rgb * vec3(color);" +
 
                  "vec3 finalColor = txt_color;" +
@@ -305,13 +317,12 @@ Item {
                  (ambientLight !== 0 ? "
                      finalColor += vec3(ambientLight) * (1.0 - distance) * (1.0 - distance);" : "") +
 
+                 (screenCurvature !== 0 ?
+                    "vec4 frameColor = texture2D(frameSource, qt_TexCoord0);
+                     finalColor = mix(finalColor, frameColor.rgb, frameColor.a);"
+                 : "") +
 
-                 "float inShadow = 1.0 - min2(smoothstep(0.0, shadowLength, staticCoords) - smoothstep(1.0 - shadowLength, 1.0, staticCoords));
-                  inShadow = pow(inShadow, 100.0) + 0.35 * inShadow * inShadow;  // Inner shadow and antialiasing when screen background is bright.
-                  finalColor = mix(finalColor, vec3(0.0), inShadow);
-
-                  finalColor = mix(origTxtColor, finalColor, staticInScreen);
-                  gl_FragColor = vec4(finalColor, qt_Opacity);" +
+                 "gl_FragColor = vec4(finalColor, qt_Opacity);" +
              "}"
 
           onStatusChanged: {
@@ -326,6 +337,29 @@ Item {
           }
      }
 
+     Loader {
+         id: terminalFrameLoader
+
+         active: screenCurvature !== 0
+
+         width: staticShader.width
+         height: staticShader.height
+
+         sourceComponent: ShaderEffectSource {
+
+             sourceItem: terminalFrame
+             hideSource: true
+             visible: false
+             format: ShaderEffectSource.RGBA
+
+             NewTerminalFrame {
+                 id: terminalFrame
+                 blending: false
+                 anchors.fill: parent
+             }
+         }
+     }
+
      ShaderEffect {
          id: staticShader
 
@@ -415,6 +449,10 @@ Item {
                  return min(v.x, v.y);
              }
 
+             float sum2(vec2 v) {
+                 return v.x + v.y;
+             }
+
              float rgb2grey(vec3 v){
                  return dot(v, vec3(0.21, 0.72, 0.04));
              }" +
@@ -457,11 +495,17 @@ Item {
                   "txt_color += vec3(0.0001);" +
                   "float greyscale_color = rgb2grey(txt_color);" +
 
+                 (screenCurvature !== 0 ? "
+                     float reflectionMask = sum2(step(vec2(0.0), curvatureCoords) - step(vec2(1.0), curvatureCoords));
+                     reflectionMask = clamp(reflectionMask, 0.0, 1.0);"
+                 :
+                     "float reflectionMask = 1.0;") +
+
                  (chromaColor !== 0 ?
                      "vec3 foregroundColor = mix(fontColor.rgb, txt_color * fontColor.rgb / greyscale_color, chromaColor);
-                      vec3 finalColor = mix(backgroundColor.rgb, foregroundColor, greyscale_color);"
+                      vec3 finalColor = mix(backgroundColor.rgb, foregroundColor, greyscale_color * reflectionMask);"
                  :
-                     "vec3 finalColor = mix(backgroundColor.rgb, fontColor.rgb, greyscale_color);") +
+                     "vec3 finalColor = mix(backgroundColor.rgb, fontColor.rgb, greyscale_color * reflectionMask);") +
 
                      (bloom !== 0 ?
                          "vec4 bloomFullColor = texture2D(bloomSource, txt_coords);
@@ -473,23 +517,9 @@ Item {
 
                  "finalColor *= screen_brightness;" +
 
-                 (screenCurvature !== 0 ? "
-                     vec2 curvatureMask = step(vec2(0.0), curvatureCoords) - step(vec2(1.0), curvatureCoords);
-                     finalColor *= clamp(0.0, 1.0, curvatureMask.x + curvatureMask.y);"
-                 :"") +
-
                  "gl_FragColor = vec4(finalColor, qt_Opacity);" +
              "}"
 
-         Loader {
-             anchors.fill: parent
-             active: screenCurvature !== 0
-
-             sourceComponent: NewTerminalFrame {
-                 blending: true
-             }
-         }
-
          onStatusChanged: {
              // Print warning messages
              if (log) console.log(log);

app/qml/SlowBurnIn.qml

@@ -0,0 +1,122 @@
+import QtQuick 2.0
+
+import "utils.js" as Utils
+
+Loader {
+    property ShaderEffectSource source: item ? item.source : null
+
+    active: !appSettings.useFastBurnIn && appSettings.burnIn !== 0
+
+    anchors.fill: parent
+
+    sourceComponent: Item {
+        property alias source: burnInSourceEffect
+
+        property int burnInScaling: scaleTexture * appSettings.burnInQuality
+
+        ShaderEffectSource {
+            property bool updateBurnIn: false
+            property real burnIn: appSettings.burnIn
+            property real fps: appSettings.fps !== 0 ? appSettings.fps : 60
+            property real burnInFadeTime: Utils.lint(minBurnInFadeTime, maxBurnInFadeTime, burnIn)
+            property real burnInCoefficient: 1000 / (fps * burnInFadeTime)
+            property real minBurnInFadeTime: appSettings.minBurnInFadeTime
+            property real maxBurnInFadeTime: appSettings.maxBurnInFadeTime
+
+            id: burnInSourceEffect
+
+            anchors.fill: parent
+
+            sourceItem: burnInEffect
+            recursive: true
+            live: false
+            hideSource: true
+            wrapMode: kterminalSource.wrapMode
+
+            visible: false
+
+            function restartBlurSource(){
+                livetimer.restart();
+            }
+
+            // This updates the burnin synched with the timer.
+            Connections {
+                target: burnInSourceEffect.updateBurnIn ? timeManager : null
+                ignoreUnknownSignals: false
+                onTimeChanged: {
+                    burnInSourceEffect.scheduleUpdate();
+                }
+            }
+
+            Timer{
+                id: livetimer
+
+                // The interval assumes 60 fps. This is the time needed burnout a white pixel.
+                // We multiply 1.1 to have a little bit of margin over the theoretical value.
+                // This solution is not extremely clean, but it's probably the best to avoid measuring fps.
+
+                interval: burnInSourceEffect.burnInFadeTime * 1.1
+                running: true
+                onTriggered: burnInSourceEffect.updateBurnIn = false;
+            }
+            Connections{
+                target: kterminal
+                onImagePainted:{
+                    burnInSourceEffect.scheduleUpdate();
+                    burnInSourceEffect.updateBurnIn = true;
+                    livetimer.restart();
+                }
+            }
+            // Restart blurred source settings change.
+            Connections{
+                target: appSettings
+                onBurnInChanged: burnInSourceEffect.restartBlurSource();
+                onTerminalFontChanged: burnInSourceEffect.restartBlurSource();
+                onRasterizationChanged: burnInSourceEffect.restartBlurSource();
+                onBurnInQualityChanged: burnInSourceEffect.restartBlurSource();
+            }
+            Connections {
+                target: kterminalScrollbar
+                onOpacityChanged: burnInSourceEffect.restartBlurSource();
+            }
+
+            ShaderEffect {
+                id: burnInEffect
+
+                property variant txt_source: kterminalSource
+                property variant blurredSource: burnInSourceEffect
+                property real burnInCoefficient: burnInSourceEffect.burnInCoefficient
+
+                anchors.fill: parent
+                blending: false
+
+                fragmentShader:
+                    "#ifdef GL_ES
+                    precision mediump float;
+                #endif\n" +
+
+                "uniform lowp float qt_Opacity;" +
+                "uniform lowp sampler2D txt_source;" +
+
+                "varying highp vec2 qt_TexCoord0;
+             uniform lowp sampler2D blurredSource;
+             uniform highp float burnInCoefficient;" +
+
+                "float max3(vec3 v) {
+                     return max (max (v.x, v.y), v.z);
+                }" +
+
+                "void main() {" +
+                    "vec2 coords = qt_TexCoord0;" +
+                    "vec3 origColor = texture2D(txt_source, coords).rgb;" +
+                    "vec3 blur_color = texture2D(blurredSource, coords).rgb - vec3(burnInCoefficient);" +
+                    "vec3 color = min(origColor + blur_color, max(origColor, blur_color));" +
+
+                    "gl_FragColor = vec4(color, max3(color - origColor));" +
+                "}"
+
+                onStatusChanged: if (log) console.log(log) //Print warning messages
+            }
+        }
+    }
+}

app/qml/TerminalContainer.qml

@@ -12,6 +12,7 @@ ShaderTerminal {
 
     source: terminal.mainSource
     burnInEffect: terminal.burnInEffect
+    slowBurnInEffect: terminal.slowBurnInEffect
     virtual_resolution: terminal.virtualResolution
 
     TimeManager{

app/qml/resources.qrc

@@ -23,7 +23,7 @@
         <file>fonts/1971-ibm-3278/3270Medium.ttf</file>
         <file>Storage.qml</file>
         <file>CRTMainMenuBar.qml</file>
-        <file>SettingsPerformanceTab.qml</file>
+        <file>SettingsAdvancedTab.qml</file>
         <file>TerminalContainer.qml</file>
         <file>images/crt256.png</file>
         <file>utils.js</file>
@@ -43,5 +43,6 @@
         <file>BurnInEffect.qml</file>
         <file>fonts/modern-terminus/TerminusTTF-4.46.0.ttf</file>
         <file>NewTerminalFrame.qml</file>
+        <file>SlowBurnIn.qml</file>
     </qresource>
 </RCC>