private UpdateScreen()

in sim/visuals/board.ts [551:628]
44 lines of code
9 McCabe index (conditional complexity)

        private UpdateScreen() {
            let state = this.board;
            if (!state) return;

            const ledMatrix = state.matrixLedState;			

            if (ledMatrix) { 

				if (!pxsim.display.getMatrixLedUpdateState()) {
					return;
				}

				pxsim.display.setMatrixLedUpdateState(false);

				//const on = ledMatrix[0].getState();

				//update led matrix screen
				this.screenCanvas.width = this.board.screenState.width
				this.screenCanvas.height = this.board.screenState.height

				const ctx = this.screenCanvas.getContext("2d")
				ctx.imageSmoothingEnabled = false
				const imgdata = ctx.getImageData(0, 0, this.board.screenState.width, this.board.screenState.height)


				const arr = new Uint32Array(imgdata.data.buffer)

				// let ledWidth = (this.board.screenState.width / 5) | 0;
				// let ledHeight = (this.board.screenState.height / 5) | 0;
				
				let ledWidth = (this.board.screenState.height / 5) | 0;
				let ledHeight = (this.board.screenState.height / 5) | 0;


				for (let i = 0; i < this.board.screenState.screen.length; i++) {
					this.board.screenState.screen[i] = 0xFF000000;
				}
				
				let active = false; // TQD_TODO: 
				
				for (let led = 0; led < ledMatrix.length; led++) {
					let xSrc = (led % 5) | 0;
					let ySrc = (led / 5) | 0;

					let xDest = xSrc * ledWidth + 34;
					let yDest = ySrc * ledHeight;

					
					
					for (let y = yDest+1; y < yDest + ledHeight-2; y++) {
						for (let x = xDest+1; x < xDest + ledWidth-2; x++) {
							let arrId = (y * this.board.screenState.width + x) | 0;

							if (ledMatrix[led].getState() == true) {
								this.board.screenState.screen[arrId] = 0xFFFFFFFF;
								
								active = true;
							}							

						}
					}					
				}
				
				this.ledMatrixActive = active;

				arr.set(this.board.screenState.screen)

				runtime.queueDisplayUpdate();
				ctx.putImageData(imgdata, 0, 0)

				this.lcd.setAttributeNS("http://www.w3.org/1999/xlink", "xlink:href", this.screenCanvas.toDataURL());				

				window.requestAnimationFrame(this.flush)
            }



        }