Re: FB_VISUAL_TRUECOLOR vs. FB_VISUAL_DIRECTCOLOR

"Antonino A. Daplas" <[email protected]> Sun, 06 Aug 2006 07:52:15 +0800
Newsgroups gmane.linux.fbdev.user
Message-ID <[email protected]>
Antonino A. Daplas wrote:
> James Lehman wrote:
>> Can someone please explain the difference between these two display types?
>>
>> FB_VISUAL_TRUECOLOR
>> FB_VISUAL_DIRECTCOLOR
>>
>> My frame buffer API, ezfb, works well with cards that are
>> FB_VISUAL_TRUECOLOR, but not so well with cards that are
>> FB_VISUAL_DIRECTCOLOR.
>>
>> http://www.akrobiz.com/ezfb/
> 

> i = red;
> red <<= 8;
> red_map[i] = red;

Wrong pseudocode, should be:

i = red;
red |= red << 8;
red_map[i] = red;

Tony
 


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