Re: Patch for Mac OS X Text Drawing

[YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>]

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>>>>> On Mon, 24 Jan 2005 11:08:02 +0100, storm@cua.dk (Kim F. Storm) said:

>> Here is a revised patch including a fix for the above bug.

> Very good, thanks!  Please install it.

Thanks for checking.  I'd like to leave it to Steven because the whole
patch (attached below) includes some changes for Mac.  Actually, I
cannot do it by myself at the moment.

				     YAMAMOTO Mitsuharu
				mituharu@math.s.chiba-u.ac.jp

2005-01-24  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>

	* dispextern.h (struct glyph_string): New members clip_head and
	clip_tail.
	
	* xdisp.c (get_glyph_string_clip_rect): Restrict horizontal clip
	region to the area between clip_head and clip_tail.
	(draw_glyphs): Record the area that need to be actually redrawn to
	the new variables clip_head and clip_tail when there are
	overhangs.  Set values of these variables to the corresponding
	members in struct glyph_string.  Refine x coordinates for
	notice_overwritten_cursor using clip_head and clip_tail.
	
	* macgui.h (STORE_XCHARSETSTRUCT): New macro.

	* macterm.c (mac_compute_glyph_string_overhangs): Implement with
	QDTextBounds.
	(x_draw_glyph_string): Don't fill the background of the successor
	of a glyph with a right overhang if the successor will draw a
	cursor.
	(XLoadQueryFont): Obtain font metrics using QDTextBounds.
	(x_redisplay_interface): Add entry for
	compute_glyph_string_overhangs.


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