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Index > Linux > Any graphic apps in console linux? (no-x11/x*)

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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
i haven't try FASM yet.
in console linux(no-x11-gtk-kde), is there any graphic example/possibility written in FASM?

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regards


Last edited by fasm9 on 03 Jul 2004, 01:23; edited 2 times in total
Post 02 Jul 2004, 23:46
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gorshing



Joined: 27 Jul 2003
Posts: 72
Location: Okla, US
gorshing
I'm working on that. But you might look into ncurses anyway. That is what I am writing ... a tutorial. Currently working on some macros, such as getmaxyx ...etc.

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gorshing
Post 02 Jul 2004, 23:49
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
sorry, the limit of my expression,

i mean sort of these things: Pixel(raster image), Frame Buffer, allegro game library.

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regards
Post 03 Jul 2004, 01:21
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Technically, you might find some programs that use SVGALIB, but there's not many of those. Console Linux *is almost always* text based; graphical apps (SVGALIB, DirectFB, X11, etc) are different in focus than console applications.
Post 03 Jul 2004, 05:31
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
once, i thought so, and now, i don't think so.

linux FB enabled linux + qingy

i guess something in kernel must be patched by FASM and re-kernel-compiled!
To do so, FASM linux version need code improvement..
Post 03 Jul 2004, 09:03
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quingy relies on DirectFB, there really isn't support for real graphics in the Linux kernel -- and that's the way it should be! You want as little as possible in the kernel, using libraries for everything else. Console != Graphical.

The kernel provides a framebuffer, but graphical programs written to use it are scarce. You could look at the 6.20 release of RetroForth for an SVGALIB based app. It starts from console mode, switches to a framebuffer, and when exited, returns to the console. IMO, that's the best way to handle graphics.
Post 03 Jul 2004, 13:59
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
no svgalib please! it has quite defect for security, though i love it.
it doesn't matter only if i am using single user mode or non networking environment but who know?

IMHO, if svgalib,FB can do graphic, then FASM also can do it!

[console] > [FB] > [console] (X)

[always FB] (O)
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Smile
Post 03 Jul 2004, 23:31
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crc



Joined: 21 Jun 2003
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Location: Penndel, PA [USA]
crc
The biggest flaw in SVGALIB is the need for programs using it to be SUID (root). This isn't a big deal, since a program needs to call vga_init(), which switches it back to a user mode program. Seriously, EVERYTHING can be a security risk; but that doesn't mean we shouldn't use them.
Post 04 Jul 2004, 08:03
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scientica
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Joined: 16 Jun 2003
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Location: Linköping, Sweden
scientica
well, I'd guess you need to be root to write something to some /dev entry, maybe changing permissions (eg allow root group to rw, and the make your self a member of the root group, would be an easier way - if my guuess is correct
Post 04 Jul 2004, 09:37
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quote:
well, I'd guess you need to be root to write something to some /dev entry, maybe changing permissions (eg allow root group to rw, and the make your self a member of the root group, would be an easier way - if my guuess is correct


You're right. That's why SVGALIB apps have to be SUID (root permissions) to initialize a framebuffer. Once the framebuffer is created, and memory mapped into the applications memory space, SUID is no longer needed, so permissions are reset to a standard user.

If you're concerned about security, only run as root when you have no other choice. I'm not overly concerned since I'm the only user of my Linux system but some people have multiple users or are always connected to the internet, they should be concerned.

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Post 04 Jul 2004, 12:22
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
i found good links for DFB
http://yuri.webhop.org/dfb4u.html

For more, use directfb cvs version.
1. patch 2.6.7-bk16 to 2.6.7 (linux kernel)
2. patch fusion-linux-2.6.3 to linux-2.6.7-bk20+ck4
3. in DFB, ./configure --prefix=/usr --enable-multi --enable-zlib --with-gfxdrivers=nvidia(which is mine)
for more: ./configure --help
4.try neptune-0.1.6 (i can't download 0.1.10)

But without FASM, something will be lack i guess

Edit: neptune is not a real DirectFB-based GUI, it still use X11 ;( , they said it is due to their limit to the various Graphic Drivers. ah, MenuetOS..


Last edited by fasm9 on 08 Jul 2004, 06:14; edited 1 time in total
Post 04 Jul 2004, 14:22
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
A better option would be to write a kernel FB interface IN FASM as opposed to using DirectFB which is written in C. Personally, I'm still of the opinion that a console is for text and graphical apps are not console apps. I might just use the kernel framebuffer directly to provide graphics in a future release of RetroForth -- I'm tired of depending on constantly changing, bloated libraries Smile
Post 05 Jul 2004, 09:55
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rob.rice



Joined: 20 Dec 2003
Posts: 54
rob.rice
at http://linuxassembly.org in the asmutils there is an example of useing the frame buffer in assembly
Post 11 Sep 2004, 16:21
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