2002-02-17  Tor Lillqvist  <tml@iki.fi>

	* gdk/win32/*.c: Massive changes. Too many to list here, but I'll
	try a summary:

	1) Unify GdkPixmap and GdkImage implementation: For each
	GdkPixmap, allocate a GdkImage, and vice versa.
	GdkPixmapImplWin32Data has a pointer to the GdkImage.
	GdkImage::windowing_data is a pointer to the GdkPixmap.

	This simplifies many pixmap and image related functions a lot, and
	reduces duplicated code snippets. For instance, there is only one
	place in gdk/win32 where CreateDIBSection() is called, in the
	function _gdk_win32_new_pixmap(). Converting a bitmap (GdkPixmap)
	to a Windows region is almost trivial, with the bitmap bits being
	readily accessible in the associated GdkImage.

	All blitting between GdkPixmaps, GdkWindows and GdkImages goes
	through handled the _gdk_win32_blit() function, which calls
	different functions to handle the cases of blitting from pixmaps,
	inside windows (scrolling), or from w...