nanogui: GrCopyArea failing with PixMap Source
Subject:
GrCopyArea failing with PixMap Source
From:
Simon Wood ####@####.####
Date:
18 Aug 2000 09:11:50 -0000
Message-Id: <44632C76B97BD211AF6B00805FADCAB202D73753@exchange.saltaire.pace.co.uk>
Hello,
Whilst mucking around I've notice a problem with GrCopyArea.... when I copy from a PixMap to a visible window it fails if the visible destination window is not at location (0,0). I suspect there's something funny about only having one window as GrCopyArea seems to function in other code I have.
The reason for the failure is the protection code in GbBlit (in engine/devdraw.c). GdClipArea seems to return 'CLIP_PARTIAL' (although the destination is the only window!!) and as a result dx, dy check fails and it bombs out of the function.
My temporary fix was to force 'CLIP_PARTIAL' to use the same Blit code as 'CLIP_VISABLE', but this would totally disable any clip detection.
Who's the man...... (Shaft flashback!).... who knows this part of the code, or can someone give me some pointers?
Simon Wood
