void texSubImage2D(int target, int level, int xoffset, int yoffset, int format_OR_width, int height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, [int type, TypedData pixels])

Source 

void texSubImage2D(int target, int level, int xoffset, int yoffset, int format_OR_width, int height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, [int type, TypedData pixels]) {
  if ((pixels is TypedData || pixels == null) && (type is int) && (canvas_OR_format_OR_image_OR_pixels_OR_video is int) && (height_OR_type is int) && (format_OR_width is int) && (yoffset is int) && (xoffset is int) && (level is int) && (target is int)) {
    _blink.BlinkWebGL2RenderingContext.instance.texSubImage2D_Callback_9_(this, target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, type, pixels);
    return;
  }
  if ((canvas_OR_format_OR_image_OR_pixels_OR_video is ImageData || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && (height_OR_type is int) && (format_OR_width is int) && (yoffset is int) && (xoffset is int) && (level is int) && (target is int) && type == null && pixels == null) {
    _blink.BlinkWebGL2RenderingContext.instance.texSubImage2D_Callback_7_(this, target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
    return;
  }
  if ((canvas_OR_format_OR_image_OR_pixels_OR_video is ImageElement) && (height_OR_type is int) && (format_OR_width is int) && (yoffset is int) && (xoffset is int) && (level is int) && (target is int) && type == null && pixels == null) {
    _blink.BlinkWebGL2RenderingContext.instance.texSubImage2D_Callback_7_(this, target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
    return;
  }
  if ((canvas_OR_format_OR_image_OR_pixels_OR_video is CanvasElement) && (height_OR_type is int) && (format_OR_width is int) && (yoffset is int) && (xoffset is int) && (level is int) && (target is int) && type == null && pixels == null) {
    _blink.BlinkWebGL2RenderingContext.instance.texSubImage2D_Callback_7_(this, target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
    return;
  }
  if ((canvas_OR_format_OR_image_OR_pixels_OR_video is VideoElement) && (height_OR_type is int) && (format_OR_width is int) && (yoffset is int) && (xoffset is int) && (level is int) && (target is int) && type == null && pixels == null) {
    _blink.BlinkWebGL2RenderingContext.instance.texSubImage2D_Callback_7_(this, target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
    return;
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}