2009-08-24  Colin D Bennett  <colin@gibibit.com>

	Bitmap scaling support.

	* conf/common.rmk (pkglib_MODULES): Add bitmap_scale.mod.
	(bitmap_scale_mod_SOURCES): New variable.
	(bitmap_scale_mod_CFLAGS): Likewise.
	(bitmap_scale_mod_LDFLAGS): Likewise.
	* include/grub/bitmap_scale.h: New file.
	* term/gfxterm.c (BACKGROUND_CMD_ARGINDEX_MODE): New definiton.
	(background_image_cmd_options): New variable.
	(grub_gfxterm_background_image_cmd): Support bitmap stretching.
	(cmd): Rename and change type to ...
	(background_image_cmd_handle): ... this. All users updated.
	(GRUB_MOD_INIT(term_gfxterm)): Make background_image extended command.
	* video/bitmap_scale.c: New file.