Add support for overdraw, and make overdraw and underdraw work correctly with non-top/left origins

src/create-object.js

@@ -57,8 +57,8 @@ module.exports = function createObject(options) {
 			this.emit("rendering");
 
 			let offset = calculateOriginOffsets({
-				width: this.renderWidth,
-				height: this.renderHeight,
+				width: this.renderWidth - this.renderUnderdrawX - this.renderOverdrawX,
+				height: this.renderHeight - this.renderUnderdrawY - this.renderOverdrawY,
 				originX: this.originX,
 				originY: this.originY
 			});
@@ -78,6 +78,8 @@ module.exports = function createObject(options) {
 			this.renderOffsetY = defaultValue(newSize.offsetY, 0) * this.scaleY;
 			this.renderUnderdrawX = defaultValue(newSize.underdrawX, 0) * this.scaleX;
 			this.renderUnderdrawY = defaultValue(newSize.underdrawY, 0) * this.scaleY;
+			this.renderOverdrawX = defaultValue(newSize.overdrawX, 0) * this.scaleX;
+			this.renderOverdrawY = defaultValue(newSize.overdrawY, 0) * this.scaleY;
 
 			this.cacheCanvas.width = this.renderWidth;
 			this.cacheCanvas.height = this.renderHeight;