2004-09-15  Sven Neumann  <sven@gimp.org>

	* libgimp/gimpdrawablepreview.[ch]
	* libgimp/gimpui.def: renamed gimp_drawable_preview_draw() to
	gimp_drawable_preview_draw_buffer() and added a rowstride
	parameter. Added new functions gimp_drawable_preview_get_drawable()
	and gimp_drawable_preview_draw_region().

	* plug-ins/common/mblur.c: added a preview that uses the
	shadow tiles as the preview buffer and draws using the new
	gimp_drawable_preview_draw_region() API.

	* plug-ins/common/photocopy.c
	* plug-ins/common/softglow.c: use gimp_drawable_preview_draw_region().

	* plug-ins/common/cartoon.c
	* plug-ins/common/despeckle.c
	* plug-ins/common/edge.c
	* plug-ins/common/gauss.c
	* plug-ins/common/grid.c
	* plug-ins/common/neon.c
	* plug-ins/common/noisify.c
	* plug-ins/common/sel_gauss.c
	* plug-ins/common/sharpen.c
	* plug-ins/common/sobel.c
	* plug-ins/common/spread.c
	* plug-ins/common/struc.c
	* plug-ins/common/unsharp.c
	* plug-ins/common/wind.c: use gimp_drawable_preview_draw_buffer().