Added ENABLE_SHADOW_FB

Added ENABLE_SHADOW_FB

2001-01-11  Alexander Larsson  <alexl@redhat.com>

	* acconfig.h:
	Added ENABLE_SHADOW_FB

	* configure.in:
	Added --disable-shadowfb

	* gdk/linux-fb/gdkcursor-fb.c:
	Update shadowfb when updating cursor

	* gdk/linux-fb/gdkdrawable-fb2.c:
	Added wrappers for shadowfb that calls 	the normal drawable
	methods, but calls gdk_shadow_fb_update(bounding box) when
	GdkWindows are drawed to.
	Moved gdk_draw_glyphs implementation to _gdk_draw_glyphs
	which also returns the bounding box.

	* gdk/linux-fb/gdkfb.h:
	Added GdkFBAngle type and gdk_fb_set_rotation declaration.

	* gdk/linux-fb/gdkgeometry-fb.c:
	Update shadowfb when scrolling window.

	* gdk/linux-fb/gdkglobals-fb.c:
	Add _gdk_fb_screen_angle.

	* gdk/linux-fb/gdkkeyboard-fb.c:
	Test code for screen rotation. Shift-F2 in the xlate driver
	rotates the screen.

	* gdk/linux-fb/gdkmain-fb.c:
	Handle shadowfb. Add gdk_fb_set_rotation(). Remove CM and RP.

	* gdk/linux-fb/gdkmouse-fb.c:
	Use fb_width/height instead of modeinfo.xres/yres.

	* gdk/linux-fb/gdkprivate-fb.h:
	Added fb_men, fb_width, fb_height & fb_stride. When using
	shadow fb these can differ from the framebuffer stuff.
	Declarations for gdk_shadow_fb_update, gdk_shadow_fb_init,
	gdk_shadow_fb_stop_updates, gdk_fb_recompute_all,
	_gdk_fb_screen_angle. Removed CM, RP.

	* gdk/linux-fb/gdkrender-fb.c:
	Added code for shadowfb handling and screen rotation using
	shadowfb.

	* gdk/linux-fb/gdkwindow-fb.c:
	Use fb_mem, fb_stride, fb_width, fb_height.
	Added recompute_rowstride to reset the rowstride of all windows.
	Added gdk_fb_recompute_all() which recomputes rootwindow size,
	window abs positions and window rowstrides. Usefull when the
	rotation has changed.