[PATCH] Use system underline and struke thru fonts

I am cleaning up the redisplay code to implement printing in Windows. This patch uses system-provided underline and strike out fonts. Struck out and underlined fonts are now supported on widgets, for no reason, because nobody wants them to look like that anyway! :) The idea is that each font instance has up to four HFONTs associated with it, called variants, for all under/struck combinations. Only one is created initially, with the rest being created and cached in instance data as they are needed, during redisplay. This patch accumulates Windows specific changes, winsys-independent part is under way. An RFC. There are now 2 ways to create an underlined face. One is to specify font modifier 'underline', like "Courier New:Regular:9:underline". The other way is to create a non-underlined font, and set underline-p property of the *face* to t. These faces won't be the same. Even worse, the first face line height will be 1 greater than the second! (Although, with 10pt size, they are same. Thanks Bill!). Should the modifiers 'underline' and 'strikethru' go away from the fonts? Big K 2000-01-17 Kirill 'Big K' Katsnelson <kkm(a)dtmx.com&gt; * faces.h (FACE_STRIKETHRU_P): Added. * glyphs-msw.c (mswindows_widget_hfont): Implemented, to take care of font variants. * redisplay-msw.c (mswindows_apply_face_effects): Deleted. (mswindows_set_dc_font): New function, aware of font variants, separated from mswindows_update_dc. * objects-msw.h (struct mswindows_font_instance_data): Added definition. * objects-msw.c (mswindows_finalize_font_instance): Delete all cached fonts and the data structure. (mswindows_initialize_font_instance): Added creation of font data structure. (mswindows_print_font_instance): Print at least something. (mswindows_create_font_variant): Implemented. (mswindows_get_hfont): Implemented.