From: baldo AT chasque DOT apc DOT org Message-Id: <3.0.1.32.19970603032952.0068dad0@chasque.apc.org> Date: Tue, 03 Jun 1997 03:29:52 -0300 To: Shawn Hargreaves Subject: ALLEGRO Re: Allegro problem Cc: djgpp AT delorie DOT com In-Reply-To: References: <33917F55 DOT E654C66D AT impsat1 DOT com DOT ar> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Precedence: bulk At 07:56 PM 02/06/1997 +0100, you wrote: >>It's pretty simple, when I run the demo in 640x480 page flipping, the >>lower half of the screen appears twice . So you never see the upper half >>of the screen. > >What graphics driver is this using? (run the test.exe program in 640x480 >autodetect mode, it will display the driver name and description in the >middle of the screen). Also, could you check the scrolling function in >test.exe, and see if you can figure out exactly how it is going wrong? >At a guess, you'll find that it is out by a power of two (either >scrolling right and left by two pixels every time you press an arrow >key, or only scrolling on every other keypress). If you could let me >know which way the error is, and which driver it is using, that would >help a lot... > Hello, I am not Fernando Salas, I am Ivan Baldo. I have talked with Fernando and Fernando and I we have the same video cards (Trident Agi9440). When I run your demo with de Trident driver and use Page Fliping the error that describes Fernando ocurs. But when I use Vesa 2.0 or Vesa 1.x the error disapears. When I use test.exe with de Trident driver and test the scroll, the screen gets noised (i dont know how to speak english very whell, sorry) only when I move, when stop moving the screen looks good. Sorry but I am not a good programmer and I can not help changing the source code, but if you want, I can test the library for you. I want to help, hope this already helped. If there something that can I do for you, please tell me!!! Congratulations for the library!!! Bye! Ivan Baldo: baldo AT chasque DOT apc DOT org