From: Dmitry Semenov <hatter@chollian.net>
  To  : ggi-develop@eskimo.com
  Date: Thu, 4 Nov 1999 11:05:38 +0900

FW: problems over matrox fb

Hi
I've just tested vesafb. I've found no problems. So I believe there is a bug
inside of some acceleration function(s).  The question is where is it, in
GGI or matroxfb or my G100 board? If any one has matrox board working with
accelerator matroxfb please test ggiDrawBox and ggiDrawLine in 16 bit
1024x768 F2 mode. Write frame should be invisible, read frame is opposite,
please use clipping 0, 0, 1027, 768 and draw functions arguments like
these -10, 10, 200, 200. Flip it and see results after drawing. I do believe
the problem is when using the other settings as well, but these settings
have problems exactly at least for my board. I use the May release version
of ggi. If this is my mistake please let me know:)

Dmitry
-----Original Message-----
From: Dmitry Semenov [mailto:hatter@chollian.net]
Sent: Monday, November 01, 1999 2:42 PM
To: ggi-develop@eskimo.com
Subject: FW: problems over matrox fb

I'm sorry to send this message ones more. I still have no any answer.
Additional info. I use Matrox G100  with 4meg memory

May be is a good idea to add an accelerator functions trigger in GGI
interface to give possibility to switch off some accelerator function in
case of bad hardware.
Best regards. Dmitry

-----Original Message-----
From: Dmitry Semenov [mailto:hatter@chollian.net]
Sent: Friday, October 29, 1999 4:17 PM
To: ggi-develop@eskimo.com
Subject: problems over matrox fb


Hi
I'm sorry if this is well known problem

I use LibGGI 2.0beta2
I've just tested some ggi drawing function over matrox fb.
I tested 1024x768 F2 with full screen clipping and also partly screen
clipping(something like 10, 0, 1024, 768).
I've found that DrawLine and DrawBox(at least) function have problems when
first (at least) coordinate X is negative.
Sample:
ggiDrawLine(-10, 20, 90, 120);
ggiDrawBox(-10, 20, 100, 100);

line left top end is pointed somewhere else -10, 20
Box disappeared from the screen

I have no problem with X target. I never tested vesafb.


Best regards, Dmitry