move color funcs to their own file instead of appearance

2025-05-19 23:13:17 +02:00
parent 80661d4f86
commit 14f7542a21
22 changed files with 229 additions and 131 deletions
@@ -0,0 +1,136 @@
+// Utility functions for color manipulation.
+
+/**
+ * Converts an RGB color object to HSV color space.
+ *
+ * @param {{r: number, g: number, b: number, a: number}} c - The color object with r, g, b, a properties (0-1).
+ * @returns {{h: number, s: number, v: number, a: number}} The HSV representation with alpha.
+ */
+function rgb2hsv(c) {
+    var r = c.r, g = c.g, b = c.b;
+    var max = Math.max(r, g, b), min = Math.min(r, g, b);
+    var h, s, v = max;
+    var d = max - min;
+    s = max === 0 ? 0 : d / max;
+    if (max === min) {
+        h = 0;
+    } else {
+        switch (max) {
+            case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+            case g: h = (b - r) / d + 2; break;
+            case b: h = (r - g) / d + 4; break;
+        }
+        h /= 6;
+    }
+    return {h: h, s: s, v: v, a: c.a};
+}
+
+/**
+ * Converts an HSV color value to an RGBA color.
+ *
+ * @param {number} h - Hue component (0-1).
+ * @param {number} s - Saturation component (0-1).
+ * @param {number} v - Value component (0-1).
+ * @param {number} a - Alpha component (0-1).
+ * @returns {Qt.rgba} The resulting color as a Qt.rgba object.
+ */
+function hsv2rgb(h, s, v, a) {
+    var r, g, b;
+    var i = Math.floor(h * 6);
+    var f = h * 6 - i;
+    var p = v * (1 - s);
+    var q = v * (1 - f * s);
+    var t = v * (1 - (1 - f) * s);
+    switch(i % 6){
+        case 0: r = v, g = t, b = p; break;
+        case 1: r = q, g = v, b = p; break;
+        case 2: r = p, g = v, b = t; break;
+        case 3: r = p, g = q, b = v; break;
+        case 4: r = t, g = p, b = v; break;
+        case 5: r = v, g = p, b = q; break;
+    }
+    return Qt.rgba(r, g, b, a);
+}
+
+/**
+ * Returns a color with the hue of color2 and the saturation, value, and alpha of color1.
+ *
+ * @param {string} color1 - The base color (any Qt.color-compatible string).
+ * @param {string} color2 - The color to take hue from.
+ * @returns {Qt.rgba} The resulting color.
+ */
+function colorWithHueOf(color1, color2) {
+    // Convert both colors to HSV
+    var c1 = Qt.color(color1);
+    var c2 = Qt.color(color2);
+
+    var hsv1 = rgb2hsv(c1);
+    var hsv2 = rgb2hsv(c2);
+
+    // Use hue from color2, saturation/value/alpha from color1
+    return hsv2rgb(hsv2.h, hsv1.s, hsv1.v, hsv1.a);
+}
+
+/**
+ * Returns a color with the saturation of color2 and the hue/value/alpha of color1.
+ *
+ * @param {string} color1 - The base color (any Qt.color-compatible string).
+ * @param {string} color2 - The color to take saturation from.
+ * @returns {Qt.rgba} The resulting color.
+ */
+function colorWithSaturationOf(color1, color2) {
+    // Convert both colors to HSV
+    var c1 = Qt.color(color1);
+    var c2 = Qt.color(color2);
+
+    var hsv1 = rgb2hsv(c1);
+    var hsv2 = rgb2hsv(c2);
+
+    // Use hue from color2, saturation/value/alpha from color1
+    return hsv2rgb(hsv1.h, hsv2.s, hsv1.v, hsv1.a);
+}
+
+/**
+ * Adapts color1 to the accent (hue and saturation) of color2, keeping value and alpha from color1.
+ *
+ * @param {string} color1 - The base color (any Qt.color-compatible string).
+ * @param {string} color2 - The accent color.
+ * @returns {Qt.rgba} The resulting color.
+ */
+function adaptToAccent(color1, color2) {
+    // Convert both colors to HSV
+    var c1 = Qt.color(color1);
+    var c2 = Qt.color(color2);
+
+    var hsv1 = rgb2hsv(c1);
+    var hsv2 = rgb2hsv(c2);
+
+    // Use hue from color2, saturation/value/alpha from color1
+    return hsv2rgb(hsv2.h, hsv2.s, hsv1.v, hsv1.a);
+}
+
+/**
+ * Mixes two colors by a given percentage.
+ *
+ * @param {string} color1 - The first color (any Qt.color-compatible string).
+ * @param {string} color2 - The second color.
+ * @param {number} percentage - The mix ratio (0-1). 1 = all color1, 0 = all color2.
+ * @returns {Qt.rgba} The resulting mixed color.
+ */
+function mix(color1, color2, percentage) {
+    var c1 = Qt.color(color1);
+    var c2 = Qt.color(color2);
+    return Qt.rgba(percentage * c1.r + (1 - percentage) * c2.r, percentage * c1.g + (1 - percentage) * c2.g, percentage * c1.b + (1 - percentage) * c2.b, percentage * c1.a + (1 - percentage) * c2.a);
+}
+
+/**
+ * Transparentizes a color by a given percentage.
+ *
+ * @param {string} color - The color (any Qt.color-compatible string).
+ * @param {number} percentage - The amount to transparentize (0-1).
+ * @returns {Qt.rgba} The resulting color.
+ */
+function transparentize(color, percentage) {
+    var c = Qt.color(color);
+    return Qt.rgba(c.r, c.g, c.b, c.a * (1 - percentage));
+}