Re: High-res printing

[Edward K. C. <ek...@lg...>]

This is just a follow-up to my printing saga.

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.

The solution is to allocate a small buffer just large enough to  
render one tile.  After rendering into the tile buffer, you can then  
copy it over to the appropriate coordinates within a larger page  
buffer if you like.  I tried this technique to produce a 2 x 2 page  
11 x 17 poster, and it is thing of beauty, I can tell you!  No  
noticeable artifacts along the tile edges, from what I can see.

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!

-Ted