RE: FW: Sorry the attachment is here
"Nitin Mahajan" <[email protected]>
| Newsgroups | gmane.linux.fbdev.user |
|---|---|
| Message-ID | <[email protected]> |
But What if I want to set the mode to TRUE_COLOR? In that case we need not worry about colormaps. Regards Nitin Mahajan Socrates Software India Pvt Ltd... mail:[email protected] Ph:51101667. Mobile : 9448260513 ====================================== The Lord gave us two ends -- one to sit on and the other to think with. Success depends on which one we use the most. -----Original Message----- From: Geert Uytterhoeven [mailto:[email protected]] Sent: Saturday, June 07, 2003 10:01 PM To: Nitin Mahajan Cc: [email protected] Subject: RE: FW: Sorry the attachment is here On Sat, 7 Jun 2003, Nitin Mahajan wrote: > But I read that if uhave a true color setting ,u don't need a > colormap, Can u please put more light on this? For truecolor you indeed don't need a colormap. But for directcolor you do. Suppose you have a pixel p = (r, g, b). In truecolor mode, the R, G, B outputs will be: R = r G = g B = b In directcolor mode, the R, G, B outputs will be: R = clut.red[r] G = clut.green[g] B = clut.blue[b] > On Sat, 7 Jun 2003, Nitin Mahajan wrote: > > The colors are definitely in RGB format. > > Actually Iam getting the fb_fix_screeeninfo.visul as > > FB_VISUAL_DIRECTCOLOR. This parameter is affected by the setings of > > var_screeninfo. Can u please tell what setings I will have to do in > > var_screen_info to get a visual as FB_VISUAL_TRUECOLOR? > > You're right, I forgot about that. > > If the visual is FB_VISUAL_DIRECTCOLOR and you want > FB_VISUAL_TRUECOLOR, you have to program a linear colormap yourself. > I.e. a colormap where > > clut.red[i] = i; > clut.green[i] = i; > clut.blue[i] = i; Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected] In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds Scanned by SecureSynergy VirusScreen Service. For more information log on to : http://www.securesynergyonline.com or http://www.securesynergy.com ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The best thread debugger on the planet. Designed with thread debugging features you've never dreamed of, try TotalView 6 free at www.etnus.com.