Returns the number of significant bits per red, green and blue value.
Not all GDK backend provide a meaningful value for this function.
The number of significant bits per color value for @visual.
Deprecated: Use gdk_visual_get_red_pixel_details() and its variants to learn about the pixel layout of TrueColor and DirectColor visuals
2.22
See Implementation
Returns the number of significant bits per red, green and blue value.
Not all GDK backend provide a meaningful value for this function.