1. DomName('WebGLRenderingContext.readPixels')
  2. DocsEditable()
void readPixels(int x, int y, int width, int height, int format, int type, TypedData pixels)

Source 

@DomName('WebGLRenderingContext.readPixels')
@DocsEditable()
void readPixels(int x, int y, int width, int height, int format, int type, TypedData pixels) => _blink.BlinkWebGLRenderingContext.instance.readPixels_Callback_7_(this, x, y, width, height, format, type, pixels);