🐛 Fix unsigned text display background int

Author: SnaveSutit

src/systems/jsonText/index.ts

@@ -380,14 +380,20 @@ export class JsonText {
 		return JsonText.intToRgba(JsonText.hexToInt(hex))
 	}
 
+	static moveHex8AlphaToStart(hex: string): string {
+		const alpha = hex.slice(-2)
+		return '#' + alpha + hex.slice(1, -2)
+	}
+
 	static hexToInt(hex: string): number {
 		if (!hex.startsWith('#') || (hex.length !== 7 && hex.length !== 9)) {
 			throw new Error('Invalid hex color format. Expected #RRGGBB or #AARRGGBB.')
 		}
 		if (hex.length === 7) {
 			hex = '#ff' + hex.slice(1) // Add alpha
 		}
-		return parseInt(hex.slice(1), 16)
+		const unsigned = parseInt(hex.slice(1), 16)
+		return unsigned > 0x7fffffff ? unsigned - 0x100000000 : unsigned
 	}
 
 	static getColor(color: TextObjectColor | TextObjectShadowColor): tinycolor.Instance {

src/systems/rigRenderer.ts

@@ -23,6 +23,7 @@ import {
 	updatePreview,
 } from './animationRenderer'
 import { IntentionalExportError } from './exporter'
+import { JsonText } from './jsonText'
 
 export interface IRenderedFace {
 	uv: number[]
@@ -522,7 +523,7 @@ function renderTextDisplay(display: TextDisplay, rig: IRenderedRig): INodeStruct
 		parent: parentId,
 		text: display.text,
 		line_width: display.lineWidth,
-		background_color: backgroundColor.toHexString(),
+		background_color: JsonText.moveHex8AlphaToStart(backgroundColor.toHex8String()),
 		background_alpha: backgroundColor.getAlpha(),
 		align: display.align,
 		shadow: display.shadow,