src/qml/controls/player: fix subtitle aliasing

The subtitle was being aligned to sub-pixel Y positions due to anchors
being continious. This caused aliasing in the text. This fixes the issue
by manually calculating the y-coordinate rather than using anchors and
rounding the result.

Author: ripose-jp

src/qml/controls/Player.qml

@@ -465,23 +465,19 @@ MpvPlayer {
             root.controller.setSubtitleVisibility(!subtitleText.visible);
         }
 
-        anchors {
-            horizontalCenter: root.horizontalCenter
-            bottom: root.bottom
-
-            /* Makes sure UI elements don't obscure the subtitles or that they go offscreen */
-            bottomMargin: {
-                let minValue = controls.visible ? controls.height : 0;
-                let maxValue = root.height - subtitleText.height;
-                if (Features.platform !== Features.MacOS && menu.visible)
-                {
-                    maxValue -= menu.height;
-                }
-                let margin = root.height * MementoSettings.interfaceSubtitleOffset;
-                margin = Math.max(margin, minValue);
-                margin = Math.min(margin, maxValue);
-                return margin;
+        anchors.horizontalCenter: root.horizontalCenter
+        /* Makes sure UI elements don't obscure the subtitles or that they go offscreen */
+        y: {
+            let minValue = controls.visible ? controls.height : 0;
+            let maxValue = root.height - subtitleText.height;
+            if (Features.platform !== Features.MacOS && menu.visible)
+            {
+                maxValue -= menu.height;
             }
+            let margin = root.height * MementoSettings.interfaceSubtitleOffset;
+            margin = Math.max(margin, minValue);
+            margin = Math.min(margin, maxValue);
+            return Math.round(root.height - (subtitleText.height + margin));
         }
 
         /* Prevents text from being wider than the window */