2008-08-30  Colin D Bennett <address@hidden>
	
	Image scaling support.  Also, gfxterm's background_image command can
	scale the image to fit the screen (--mode/-m option).

	* conf/i386-pc.rmk (bitmap_mod_SOURCES): Added new source files.

	* include/grub/bitmap_scale.h: New file.
	* video/bitmap_scale.c: New file.
	* video/bitmap_scale_bilinear.c: New file.
	* video/bitmap_scale_nn.c: New file.

	* term/gfxterm.c (BACKGROUND_CMD_ARGINDEX_MODE): New macro.
	(background_image_cmd_options): New static variable.
	(grub_gfxterm_background_image_cmd): Handle --mode/-m option and scale
	the bitmap to the screen size if requested.  Also includes a
	"drive-by" fix to an erroneous assignment of the bitmap width to
	'bitmap_height'.
	(GRUB_MOD_INIT): Pass background_image_cmd_options to
	grub_register_command.