Improve terminal frame and expose frame size setting.

2025-11-01 15:42:12 +00:00 · 2021-07-15 23:20:42 +02:00
parent 3104abd4ad
commit 4abbe332db
6 changed files with 96 additions and 60 deletions
--- a/app/qml/TerminalFrame.qml
+++ b/app/qml/TerminalFrame.qml
@@ -0,0 +1,104 @@
+/*******************************************************************************
+* Copyright (c) 2013-2021 "Filippo Scognamiglio"
+* https://github.com/Swordfish90/cool-retro-term
+*
+* This file is part of cool-retro-term.
+*
+* cool-retro-term is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*******************************************************************************/
+import QtQuick 2.0
+
+import "utils.js" as Utils
+
+ShaderEffect {
+    property color _staticFrameColor: "#fff"
+    property color _backgroundColor: appSettings.backgroundColor
+    property color _fontColor: appSettings.fontColor
+    property color _lightColor: Utils.mix(_fontColor, _backgroundColor, 0.2)
+    property real _ambientLight: Utils.lint(0.2, 0.8, appSettings.ambientLight)
+
+    property color frameColor: Utils.mix(_staticFrameColor, _lightColor, _ambientLight)
+    property real screenCurvature: appSettings.screenCurvature * appSettings.screenCurvatureSize
+
+    // Coefficient of the log curve used to approximate shadowing
+    property real screenShadowCoeff: Utils.lint(20.0, 10.0, _ambientLight)
+    property real frameShadowCoeff: Utils.lint(20.0, 10.0, _ambientLight)
+
+    property size margin: Qt.size(
+        appSettings.frameMargin / width * appSettings.windowScaling,
+        appSettings.frameMargin / height * appSettings.windowScaling
+    )
+
+    ShaderLibrary {
+        id: shaderLibrary
+    }
+
+    fragmentShader: "
+        #ifdef GL_ES
+            precision mediump float;
+        #endif
+
+        uniform lowp float screenCurvature;
+        uniform lowp float screenShadowCoeff;
+        uniform lowp float frameShadowCoeff;
+        uniform highp float qt_Opacity;
+        uniform lowp vec4 frameColor;
+        uniform mediump vec2 margin;
+
+        varying highp vec2 qt_TexCoord0;
+
+        vec2 distortCoordinates(vec2 coords){
+            vec2 cc = (coords - vec2(0.5));
+            float dist = dot(cc, cc) * screenCurvature;
+            return (coords + cc * (1.0 + dist) * dist);
+        }
+        " +
+
+        shaderLibrary.max2 +
+        shaderLibrary.min2 +
+        shaderLibrary.prod2 +
+        shaderLibrary.sum2 +
+
+        "
+
+        vec2 positiveLog(vec2 x) {
+            return clamp(log(x), vec2(0.0), vec2(100.0));
+        }
+
+        void main() {
+            vec2 staticCoords = qt_TexCoord0;
+            vec2 coords = distortCoordinates(staticCoords) * (vec2(1.0) + margin * 2.0) - margin;
+
+            vec2 vignetteCoords = staticCoords * (1.0 - staticCoords.yx);
+            float vignette = pow(prod2(vignetteCoords) * 15.0, 0.25);
+
+            vec3 color = frameColor.rgb * vec3(1.0 - vignette);
+            float alpha = 0.0;
+
+            float frameShadow = max2(positiveLog(-coords * frameShadowCoeff + vec2(1.0)) + positiveLog(coords * frameShadowCoeff - (vec2(frameShadowCoeff) - vec2(1.0))));
+            frameShadow = max(sqrt(frameShadow), 0.0);
+            color *= frameShadow;
+            alpha = sum2(1.0 - step(vec2(0.0), coords) + step(vec2(1.0), coords));
+            alpha = clamp(alpha, 0.0, 1.0);
+            alpha *= mix(1.0, 0.9, frameShadow);
+
+            float screenShadow = 1.0 - prod2(positiveLog(coords * screenShadowCoeff + vec2(1.0)) * positiveLog(-coords * screenShadowCoeff + vec2(screenShadowCoeff + 1.0)));
+            alpha = max(0.8 * screenShadow, alpha);
+
+            gl_FragColor = vec4(color * alpha, alpha);
+        }
+    "
+
+    onStatusChanged: if (log) console.log(log) //Print warning messages
+}