Re: Having hard time using XGetImage with glDrawPixels in OpenGL

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Article #38300

#38300

From: Michael Sweet
Date: Mon, 19 May 1997 00:00

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Shuky Rosinger wrote:
> ...
> I am using Linux with Mesa 2.2. I use 16bpp display with visual of depth
> 16.
> 

I would suspect that this is the problem - XGetImage returns pixels in
the source windows/pixmap's visual & depth.  

I don't remember if Mesa supports a 16-bit RGB extension format or not.
If so, use that instead of GL_UNSIGNED_BYTE (e.g. 
GL_UNSIGNED_SHORT_5_5_5_1).

If there isn't support for the 16-bit RGB(A) visual type, you'll need
to convert your 16-bit pixels to 24-bit RGB (or 32-bit RGBA).

-- 
________________________________________________________________________
 Mike Sweet        Software for SGI and Sun      Easy Software Products
 (301) 373-9603          Workstation           44145 Airport View Drive
 mike@easysw.com    http://www.easysw.com    Hollywood, Maryland  20636

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From: Michael Sweet <mike@easysw.com>
Subject: Re: Having hard time using XGetImage with glDrawPixels in OpenGL
Date: 1997/05/19
Message-ID: <3380E892.1CFB@easysw.com>
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References: <337FFE27.E564C73@numbat.cs.rmit.edu.au>
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