Canvas Snapshot always returning 0 as color value?

Hi! I tried to save a color palette to a canvas and then get the color value at the touch position. But it's always returning 0 for red, green and blue values. Why?

+ System: On start of layout

-> DrawingCanvas: Paste object ColorPalette with effects

-> System: Wait for previous actions to complete

--------------------------

+ Touch: On tap gesture on ColorPalette

-> System: Set LastTouchX to floor(Touch.X)

-> System: Set LastTouchY to floor(Touch.Y)

-> DrawingCanvas: Save snapshot

----------------------------

+ DrawingCanvas: On snapshot

-> Sprite: Set color to rgbEx255(DrawingCanvas.SnapshotRedAt(LastTouchX, LastTouchY), DrawingCanvas.SnapshotGreenAt(LastTouchX, LastTouchY), DrawingCanvas.SnapshotBlueAt(LastTouchX, LastTouchY))

-> Browser: Alert "RED: "&DrawingCanvas.SnapshotRedAt(LastTouchX, LastTouchY)&" GREEN: "& DrawingCanvas.SnapshotGreenAt(LastTouchX, LastTouchY)&" BLUE: "& DrawingCanvas.SnapshotBlueAt(LastTouchX, LastTouchY)

You need to convert touch coordinates to canvas snapshot coordinates:

Set snapshotX to round((Touch.X-DrawingCanvas.BBoxLeft)/DrawingCanvas.PixelScale)

Set snapshotY to round((Touch.Y-DrawingCanvas.BBoxTop)/DrawingCanvas.PixelScale)

And then use these variables to get the colors.