nanogui: PNG support
Subject:
Re: [nanogui] PNG Support
From:
"Greg Haerr" ####@####.####
Date:
26 Sep 2002 18:20:48 -0000
Message-Id: <097101c26588$112fd420$3aba46a6@xmission.com>
: The default Microwindows internal representation is 24 bits - which is much
easier for us to handle - you can easily read the RGB values, and you can easily
convert it to other formats. All the image formats are converted to 24 bit
format, which are then re-converted in devdraw.c:GdDrawImage().
This isn't really true - the MWIMAGEHDR internal representation
can be one of 1,8,16,24 or 32bpp. This allows a decoder to decode
to whatever format is desired. Of course, the 24/32bpp representation
keeps the most color data for later rendering on any hardware.
BTW, on my systems, 32bpp is noticably faster than 24bpp.
:
: I know that it may be overkill to take an 8 bit image, converted it to 24
bits, and then reconvert it to 8 bits, but that actually contributes to the
simplicity and size of Microwindows. Can you imagine handling converting 1, 2,
4, 8, 16, and 24 bit images to one another? Thats 5 times as many conversion
routines than we have right now.
I agree here.
Regards,
Greg
