Re: High-res printing

[James W. W. <ja...@fr...>]

"Edward K. Chew" <ek...@lg...> wrote:

>After trying this and that, it seems I have finally hit on a winning
>recipe.  I thought I could get away with allocating one large 11 x
>17 @ 300 dpi buffer and rendering into it in tiles no larger than
>2048 x 2048 pixels through careful manipulation of view ports and
>pane rectangles, but no joy.  Apparently, there is some kind of
>limit to the absolute dimensions of the buffer, regardless of how
>small a pane you are accessing within it.  Should you exceed that
>limit, you will see some psychedelic wraparound effects.

...

>I think this buffer size limit is more sensitive to the horizontal
>dimension.  It only seems to come up when I print in landscape
>orientation.  This is all under Tiger, incidentally.  With some
>trepidation, I plan to test the same code under Panther today...wish
>me luck!

This sounds like a rowBytes limit, so it prompted me to search for 
rowBytes usage in Quesa.  I found a bug in E3MacDrawContext.c, where 
it was directly reading the rowBytes field of a PixMapHandle instead 
of using GetPixRowBytes.  I checked in a fix.  So you might want to 
check that out, and try the big-buffer method again.
-- 
   James W. Walker, ScriptPerfection Enterprises, Inc.
   <http://www.write-brain.com/>