2008-11-08  Michael Natterer  <mitch@gimp.org>

	Abstract the legacy projection code away into a virtual function
	of GimpDrawable:

	* app/core/gimpdrawable.[ch]: add new virtual function
	GimpDrawable::project_region() which projects an area of a
	drawable onto a passed in PixelRegion.

	* app/core/Makefile.am
	* app/core/gimpchannel-project.[ch]
	* app/core/gimplayer-project.[ch]: new files which implement it.

	* app/core/gimpchannel.c
	* app/core/gimplayer.c: hook it in.

	* app/core/gimpprojection-construct.c: get rid all the projection
	code moved to above new files and project all drawables in one
	loop.

	* app/core/gimpprojectable.[ch]: remove the legacy methods
	get_colormap() and get_components(), they are not needed any
	longer.

	* app/core/gimpimage.c: changed accordingly.


svn path=/trunk/; revision=27571