Path: utzoo!attcan!uunet!cs.utexas.edu!usc!ucsd!ucsdhub!btree!eskin
From: eskin@btree.uucp (Michael Eskin)
Newsgroups: comp.windows.ms
Subject: Bitmaps under Windows
Keywords: BLT Bitmap CopyBits Help!
Message-ID: <142@btree.uucp>
Date: 27 Feb 90 18:16:32 GMT
Organization: Brooktree Corp., San Diego
Lines: 19

We are in the process of porting some Macintosh code to Windows and are
having some trouble with bitmaps.  On the Macintosh, I an able to setup
a bitmap that points to a particular address in memory and then BLT to
or from that bitmap.  In the application we are writing, a buffer
containing bitmap data, and the organization of that data are being
passed to a routine that wants to BLT that data either to another
location in memory or to a window.  Is it possible to create a device
context for the source bitmap and then associate the buffer memory with
that context without having Windows allocate the bits when the device
context is created?  The application that we are writing is designed to
be platform independent until the BLT, so there really isn't a concept
of a device context for Windows until the BLT routine is called.

We have been fighting with this problem for a few months without much
luck so any help would be greatly appreciated!

Michael Eskin
Brooktree Imaging SBU
(619) 535-3476