The function returns a list of visual structures that have attributes equal to the attributes specified by vinfo_template. If no visual structures match the template using the specified vinfo_mask, returns a NULL. To free the data returned by this function, use
The function returns the visual information for a visual that matches the specified depth and class for a screen. Because multiple visuals that match the specified depth and class can exist, the exact visual chosen is undefined. If a visual is found, returns nonzero and the information on the visual to vinfo_return. Otherwise, when a visual is not found, returns zero.
The function returns the visual ID for the specified visual type.