[Libdlo] QWT Screen Update Problem
atodorov at otb.bg
Mon Feb 21 09:41:00 PST 2011
На 21.02.2011 19:13, Chris Pike написа:
>> Hello Chris,
>> are you using X server or trying to write to the frame buffer
> I'm trying to write to the frame buffer directly (actually via QWS).
I don't have experience with Qt but found this in udlfb.c:
* dlfb_write is triggered by usermode clients who write to filesystem
* e.g. cat filename > /dev/fb1
* Not used by X Windows or text-mode console. But useful for testing.
* Slow because of extra copy and we must assume all pixels dirty.
static ssize_t dlfb_write(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos)
Hope it is helpful.
More information about the Libdlo