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From: | Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Allegro: Grayscale creation |
Organization: | Pin Eight Software http://pineight.8m.com/ |
Message-ID: | <ed9ohsc41b9t1g5frhv564qvlcd8l5bpov@4ax.com> |
References: | <391C097E DOT 74720B9C AT tiscalinet DOT it> |
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NNTP-Posting-Date: | Fri, 12 May 2000 15:58:31 GMT |
Distribution: | world |
Date: | Fri, 12 May 2000 15:58:31 GMT |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
On Fri, 12 May 2000 15:39:10 +0200, night DOT walker AT tiscalinet DOT it wrote: >I want to set a 256-color grayscale on a 8bit screen, so i wrote: [snip: gives four palettes of 64 grays each] >How can I fix this? (i need more than 64 grays!) The VGA specification only supports 64 levels of each component; there is no standard extension to make cards support 256 levels. Try this (untested) snippet, which adds a bit of color noise to the grays to get them to look a little better: int x; PALETTE pal; for(x = 0; x < 256; x++) { pal[x].r = (x + rand() % 4) * 63 / 255; pal[x].g = (x + rand() % 4) * 63 / 255; pal[x].b = (x + rand() % 4) * 63 / 255; } set_palette(pal); -- Damian Yerrick "I refuse to listen to those who refuse to listen to reason." See the whole sig: http://www.rose-hulman.edu/~yerricde/sig.html This is McAfee VirusScan. Add these two lines to your signature to prevent the spread of signature viruses. http://www.mcafee.com/
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