From: "Alexei A. Frounze" Newsgroups: comp.os.msdos.djgpp Subject: Re: 3 Newbie questions about graphics Date: Mon, 22 May 2000 00:21:03 +0400 Organization: MTU-Intel ISP Lines: 32 Message-ID: <3928452F.F08F3E1F@mtu-net.ru> References: NNTP-Posting-Host: ppp108-234.dialup.mtu-net.ru Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit X-Trace: gavrilo.mtu.ru 958940945 71823 212.188.108.234 (21 May 2000 20:29:05 GMT) X-Complaints-To: usenet-abuse AT mtu DOT ru NNTP-Posting-Date: 21 May 2000 20:29:05 GMT X-Mailer: Mozilla 4.72 [en] (Win95; I) X-Accept-Language: ru,en To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Christian wrote: > > Hi, i have 3 questions > > 1. If i want to show a image on the screen, do i have to set a pallete for > it? > if so > 2. How do i create that pallete? I haven't been able to find anything > about it in allegro.txt. Where is the 3rd one? :) 1. You need to setup palette, if your gfx mode is palettized (256 colors). Hi/true-color gfx modes don't need palette. They work with RGB. 2. A. If your picture file holds a hi/true-color picture, you must make up a palette from it for 256-colored gfx mode and convert the RGB image data to 8-bit indexes. You don't have to do that, if your gfx mode is the same hi/true-color. 2. B. If your picture file is 256-colored you get palette from the file. Then you either setup that palette for 256-colored gfx mode or convert image data to RGB for hi/true-color gfx mode depending on the palette stored in the picture file. Good Luck Alexei A. Frounze ----------------------------------------- Homepage: http://alexfru.chat.ru Mirror: http://members.xoom.com/alexfru