nanogui: patch 2 jpg
Subject:
RE: [nanogui] patch 2 jpg
From:
Junior ####@####.####
Date:
9 Apr 2007 16:00:07 +0100
Message-Id: <88BC79D7C0A.000001EDejr@inbox.com>
> -----Original Message-----
> From: ####@####.####
> Sent: Fri, 6 Apr 2007 10:48:46 -0800
> To: ####@####.####
> Subject: [nanogui] patch 2 jpg
>
> I've been working on a faster jpeg code and try to optimize it for ARM.
> I've borrowed a lof of the code from a source I can't remember.
> It works pretty well on ARM7 systems but I've notice something strange
> when I tried it on an ARM9 system that I haven't been able to explain as
> yet.
> For som reason on ARM9 systems the colour red is not showing up as red
> but
> a shade of green and the image is also not clear but have blotches.
> None of this appears on the ARM7 as the image is pretty clear.
> When I use the standard Jpeg library, the colors are ok but the image is
> also not as clear.
>
> Does anyone have any suggestions on this code? Any feedback are welcome.
I've found that the problem is with pimage->compression = MWIMAGE_RGB.
I'm using a 555 format and the devdraw.c fuctions was using 565 format for pixel2colorval instead of the 555 the system uses.
I've change MWIMAGE_RGB to MWIMAGE_555 if PIXEL format is 555.
One problem I'm also trying to fix is that when the image size is off, I get a seg fault so I drop the last pixel if I found the image to be of odd size. This is not a good solution but it works for now.
I'll appreciate any suggestions or comments on this code.
Thanks,
--Jr.
