Imagesettile() sets the tile image to be used by all region filling functions (such as imagefill() and imagefilledpolygon()) when filling with the special color IMG_COLOR_TILED.

• imagesettile()设定所有区域填充函数(例如imagefill()和imagefilledpolygon())在使用特殊颜色IMG_COLOR_TILED填充时所使用的贴图。