Re: [Fwd: Folow-up question regarding the linux-fb port of gtk]

[Owen Taylor <otaylor redhat com>]

On Tue, 2003-07-08 at 14:22, Abhishek Chitlangia wrote:
> I'm in the process of porting gtk to a developmental OS that has its own 
> basic windowing system that controls all memory and device accesses. 
> This means that when I open a new display, the mmap call that maps the 
> display's fb_mem pointer to the memory-mapped linux-fb (/dev/fb0) is 
> replaces with a call to a function that returns a memory region that is 
> to be assumed to be the linux fb. Hence, all operations that change the 
> fb contents (like changing pixel contents) will now have to be followed 
> up with a call to the windowing system to tell it to blit the contents 
> onto the actual fb.
> 
> My question is this:
> Is there one file or set of files whose functions write directly to the 
> linux fb?
> gdkrender-fb.c is one: are there any others?
> 
> appreciate any help. thanks.

You probably should look at the --enable-shadow-fb configure option ...
I'm not sure how finished it is, but it is meant to work exactly
as you described, where rendering operations go to an intermediate
frame buffer, then are blitted to the real fb.

Regards,
						Owen