Hi, > >>>>> VNC is protocol limited to uint16 for width/height size, and so is X11 > >>>>> so I imagine some exploding behavour would follow :-) > >>>> > >>>> Indeed, and even 2^16 x 2^16 * 32bpp is already 34 bits. So perhaps we > >>>> should limit VNC to 16384 pixels on each axis (maximum frame buffer size > >>>> 1 GiB). > >>> > >>> Google says you can already get graphics cards that can do 15360x8640, > >>> which is really quite close to that 16384 limit... > >> > >> Then we can do 32767 * 16384 * 4, but I'm a bit afraid of off-by-ones. > > > > Simply limit it to 30000 * 20000 ? > > That's too much (exceeds 2^31-1 at 32bpp), but yeah, 30720*17280 is > twice what Peter found and it's safe.
We already have: #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT) #define VNC_MAX_HEIGHT 2048 If the guest framebuffer is larger you'll get the upper left corner only I think. spice can handle larger resolutions. cheers, Gerd
