nanogui: GR_PIXELVAL for TRUECOLOR555
Subject:
Re: [nanogui] GR_PIXELVAL for TRUECOLOR555
From:
Jordan Crouse ####@####.####
Date:
21 Sep 2001 14:28:07 -0000
Message-Id: <01092108252400.19633@cosmic>
GR_PIXELVAL is always an unsigned long. It is used as an internal
representation of color values which then get converted to their correct
format in the screen drivers. Check include/device.h for some of the
conversion macros that we use.
How you should store your arrays depends on which functions you are calling.
If you are creating an image, then the data should be formated like the image
requires. If you are doing a GrArea() call, the function will allow you to
pass in a flag that give you the choice of storing your values in which ever
format you like.
Hope this helps,
Jordan
On Friday 21 September 2001 04:30, Leonid Romanov mentioned:
> Hi!
> Can anybody tell me why GR_PIXELVAL is defined as unsigned long for
> TRUECOLOR555 format? Should I allocate array of longs for TRUECOLOR555
> image pixels or array of shorts?
>
> Thanks in advance. Leonid.
>
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