xenocara/app/xterm/fontutils.c

/* $XTermId: fontutils.c,v 1.270 2008/02/29 00:25:16 Andrea.Odetti Exp $ */

/************************************************************

Copyright 1998-2007,2008 by Thomas E. Dickey

                        All Rights Reserved

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name(s) of the above copyright
holders shall not be used in advertising or otherwise to promote the
sale, use or other dealings in this Software without prior written
authorization.

********************************************************/

/*
 * A portion of this module (for FontNameProperties) was adapted from EMU 1.3;
 * it constructs font names with specific properties changed, e.g., for bold
 * and double-size characters.
 */

#define RES_OFFSET(field)	XtOffsetOf(SubResourceRec, field)

#include <fontutils.h>
#include <X11/Xmu/Drawing.h>

#include <main.h>
#include <data.h>
#include <menu.h>
#include <xstrings.h>
#include <xterm.h>

#include <stdio.h>
#include <ctype.h>

/* from X11/Xlibint.h - not all vendors install this file */
#define CI_NONEXISTCHAR(cs) (((cs)->width == 0) && \
			     (((cs)->rbearing|(cs)->lbearing| \
			       (cs)->ascent|(cs)->descent) == 0))

#define CI_GET_CHAR_INFO_1D(fs,col,def,cs) \
{ \
    cs = def; \
    if (col >= fs->min_char_or_byte2 && col <= fs->max_char_or_byte2) { \
	if (fs->per_char == NULL) { \
	    cs = &fs->min_bounds; \
	} else { \
	    cs = &fs->per_char[(col - fs->min_char_or_byte2)]; \
	    if (CI_NONEXISTCHAR(cs)) cs = def; \
	} \
    } \
}

#define CI_GET_CHAR_INFO_2D(fs,row,col,def,cs) \
{ \
    cs = def; \
    if (row >= fs->min_byte1 && row <= fs->max_byte1 && \
	col >= fs->min_char_or_byte2 && col <= fs->max_char_or_byte2) { \
	if (fs->per_char == NULL) { \
	    cs = &fs->min_bounds; \
	} else { \
	    cs = &fs->per_char[((row - fs->min_byte1) * \
				(fs->max_char_or_byte2 - \
				 fs->min_char_or_byte2 + 1)) + \
			       (col - fs->min_char_or_byte2)]; \
	    if (CI_NONEXISTCHAR(cs)) cs = def; \
	} \
    } \
}

#define MAX_FONTNAME 200

/*
 * A structure to hold the relevant properties from a font
 * we need to make a well formed font name for it.
 */
typedef struct {
    /* registry, foundry, family */
    char *beginning;
    /* weight */
    char *weight;
    /* slant */
    char *slant;
    /* wideness */
    char *wideness;
    /* add style */
    char *add_style;
    int pixel_size;
    char *point_size;
    int res_x;
    int res_y;
    char *spacing;
    int average_width;
    /* charset registry, charset encoding */
    char *end;
} FontNameProperties;

#if OPT_SHIFT_FONTS
static void lookupOneFontSize(XtermWidget, int);
#endif

#if OPT_WIDE_CHARS
static Bool
countGlyphs(XFontStruct * fp)
{
    unsigned count = 0;

    if (fp != 0) {
	if (fp->min_byte1 == 0 && fp->max_byte1 == 0) {
	    count = fp->max_char_or_byte2 - fp->min_char_or_byte2;
	} else if (fp->min_char_or_byte2 < 256
		   && fp->max_char_or_byte2 < 256) {
	    unsigned first = (fp->min_byte1 << 8) + fp->min_char_or_byte2;
	    unsigned last = (fp->max_byte1 << 8) + fp->max_char_or_byte2;
	    count = last + 1 - first;
	}
    }
    return count;
}

/*
 * Verify that the wide-bold font is at least a bold font with roughly as many
 * glyphs as the wide font.  The counts should be the same, but settle for
 * filtering out the worst of the font mismatches.
 */
static Bool
compatibleWideCounts(XFontStruct * wfs, XFontStruct * wbfs)
{
    unsigned count_w = countGlyphs(wfs);
    unsigned count_wb = countGlyphs(wbfs);
    if (count_w <= 256 ||
	count_wb <= 256 ||
	((count_w / 4) * 3) > count_wb) {
	TRACE(("...font server lied (count wide %u vs wide-bold %u)\n",
	       count_w, count_wb));
	return False;
    }
    return True;
}
#endif /* OPT_WIDE_CHARS */

/*
 * Returns the fields from start to stop in a dash- separated string.  This
 * function will modify the source, putting '\0's in the appropiate place and
 * moving the beginning forward to after the '\0'
 *
 * This will NOT work for the last field (but we won't need it).
 */
static char *
n_fields(char **source, int start, int stop)
{
    int i;
    char *str, *str1;

    /*
     * find the start-1th dash
     */
    for (i = start - 1, str = *source; i; i--, str++)
	if ((str = strchr(str, '-')) == 0)
	    return 0;

    /*
     * find the stopth dash
     */
    for (i = stop - start + 1, str1 = str; i; i--, str1++)
	if ((str1 = strchr(str1, '-')) == 0)
	    return 0;

    /*
     * put a \0 at the end of the fields
     */
    *(str1 - 1) = '\0';

    /*
     * move source forward
     */
    *source = str1;

    return str;
}

/*
 * Gets the font properties from a given font structure.  We use the FONT name
 * to find them out, since that seems easier.
 *
 * Returns a pointer to a static FontNameProperties structure
 * or NULL on error.
 */
static FontNameProperties *
get_font_name_props(Display * dpy, XFontStruct * fs, char *result)
{
    static FontNameProperties props;
    static char *last_name;

    XFontProp *fp;
    int i;
    Atom fontatom = XInternAtom(dpy, "FONT", False);
    char *name;
    char *str;

    /*
     * first get the full font name
     */
    for (name = 0, i = 0, fp = fs->properties;
	 i < fs->n_properties;
	 i++, fp++)
	if (fp->name == fontatom)
	    name = XGetAtomName(dpy, fp->card32);

    if (name == 0)
	return 0;

    /*
     * XGetAtomName allocates memory - don't leak
     */
    if (last_name != 0)
	XFree(last_name);
    last_name = name;

    if (result != 0) {
	if (strlen(name) < MAX_FONTNAME - 1) {
	    strcpy(result, name);
	} else {
	    TRACE(("fontname too large: %s\n", name));
	    return 0;
	}
    }

    /*
     * Now split it up into parts and put them in
     * their places. Since we are using parts of
     * the original string, we must not free the Atom Name
     */

    /* registry, foundry, family */
    if ((props.beginning = n_fields(&name, 1, 3)) == 0)
	return 0;

    /* weight is the next */
    if ((props.weight = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* slant */
    if ((props.slant = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* width */
    if ((props.wideness = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* add style */
    if ((props.add_style = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* pixel size */
    if ((str = n_fields(&name, 1, 1)) == 0)
	return 0;
    if ((props.pixel_size = atoi(str)) == 0)
	return 0;

    /* point size */
    if ((props.point_size = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* res_x */
    if ((str = n_fields(&name, 1, 1)) == 0)
	return 0;
    if ((props.res_x = atoi(str)) == 0)
	return 0;

    /* res_y */
    if ((str = n_fields(&name, 1, 1)) == 0)
	return 0;
    if ((props.res_y = atoi(str)) == 0)
	return 0;

    /* spacing */
    if ((props.spacing = n_fields(&name, 1, 1)) == 0)
	return 0;

    /* average width */
    if ((str = n_fields(&name, 1, 1)) == 0)
	return 0;
    if ((props.average_width = atoi(str)) == 0)
	return 0;

    /* the rest: charset registry and charset encoding */
    props.end = name;

    return &props;
}

#define ALLOCHUNK(n) ((n | 127) + 1)

static void
alloca_fontname(char **result, unsigned next)
{
    unsigned last = (*result != 0) ? strlen(*result) : 0;
    unsigned have = (*result != 0) ? ALLOCHUNK(last) : 0;
    unsigned want = last + next + 2;

    if (want >= have) {
	want = ALLOCHUNK(want);
	if (last != 0) {
	    *result = TypeRealloc(char, want, *result);
	} else {
	    if ((*result = TypeMallocN(char, want)) != 0)
		**result = '\0';
	}
    }
}

static void
append_fontname_str(char **result, char *value)
{
    if (value == 0)
	value = "*";
    alloca_fontname(result, strlen(value));
    if (*result != 0) {
	if (**result != '\0')
	    strcat(*result, "-");
	strcat(*result, value);
    }
}

static void
append_fontname_num(char **result, int value)
{
    if (value < 0) {
	append_fontname_str(result, "*");
    } else {
	char temp[100];
	sprintf(temp, "%d", value);
	append_fontname_str(result, temp);
    }
}

/*
 * Take the given font props and try to make a well formed font name specifying
 * the same base font and size and everything, but with different weight/width
 * according to the parameters.  The return value is allocated, should be freed
 * by the caller.
 */
static char *
derive_font_name(FontNameProperties * props,
		 char *use_weight,
		 int use_average_width,
		 char *use_encoding)
{
    char *result = 0;

    append_fontname_str(&result, props->beginning);
    append_fontname_str(&result, use_weight);
    append_fontname_str(&result, props->slant);
    append_fontname_str(&result, 0);
    append_fontname_str(&result, 0);
    append_fontname_num(&result, props->pixel_size);
    append_fontname_str(&result, props->point_size);
    append_fontname_num(&result, props->res_x);
    append_fontname_num(&result, props->res_y);
    append_fontname_str(&result, props->spacing);
    append_fontname_num(&result, use_average_width);
    append_fontname_str(&result, use_encoding);

    return result;
}

static char *
bold_font_name(FontNameProperties * props, int use_average_width)
{
    return derive_font_name(props, "bold", use_average_width, props->end);
}

#if OPT_WIDE_CHARS
#define derive_wide_font(props, weight) \
	derive_font_name(props, weight, props->average_width * 2, "ISO10646-1")

static char *
wide_font_name(FontNameProperties * props)
{
    return derive_wide_font(props, "medium");
}

static char *
widebold_font_name(FontNameProperties * props)
{
    return derive_wide_font(props, "bold");
}
#endif /* OPT_WIDE_CHARS */

#if OPT_DEC_CHRSET
/*
 * Take the given font props and try to make a well formed font name specifying
 * the same base font but changed depending on the given attributes and chrset.
 *
 * For double width fonts, we just double the X-resolution, for double height
 * fonts we double the pixel-size and Y-resolution
 */
char *
xtermSpecialFont(TScreen * screen, unsigned atts, unsigned chrset)
{
#if OPT_TRACE
    static char old_spacing[80];
    static FontNameProperties old_props;
#endif
    FontNameProperties *props;
    char *result = 0;
    char *weight;
    int pixel_size;
    int res_x;
    int res_y;

    props = get_font_name_props(screen->display, screen->fnts[fNorm].fs, 0);
    if (props == 0)
	return result;

    pixel_size = props->pixel_size;
    res_x = props->res_x;
    res_y = props->res_y;
    if (atts & BOLD)
	weight = "bold";
    else
	weight = props->weight;

    if (CSET_DOUBLE(chrset))
	res_x *= 2;

    if (chrset == CSET_DHL_TOP
	|| chrset == CSET_DHL_BOT) {
	res_y *= 2;
	pixel_size *= 2;
    }
#if OPT_TRACE
    if (old_props.res_x != res_x
	|| old_props.res_x != res_y
	|| old_props.pixel_size != pixel_size
	|| strcmp(old_props.spacing, props->spacing)) {
	TRACE(("xtermSpecialFont(atts = %#x, chrset = %#x)\n", atts, chrset));
	TRACE(("res_x      = %d\n", res_x));
	TRACE(("res_y      = %d\n", res_y));
	TRACE(("point_size = %s\n", props->point_size));
	TRACE(("pixel_size = %d\n", pixel_size));
	TRACE(("spacing    = %s\n", props->spacing));
	old_props.res_x = res_x;
	old_props.res_x = res_y;
	old_props.pixel_size = pixel_size;
	old_props.spacing = strcpy(old_spacing, props->spacing);
    }
#endif

    append_fontname_str(&result, props->beginning);
    append_fontname_str(&result, weight);
    append_fontname_str(&result, props->slant);
    append_fontname_str(&result, props->wideness);
    append_fontname_str(&result, props->add_style);
    append_fontname_num(&result, pixel_size);
    append_fontname_str(&result, props->point_size);
    append_fontname_num(&result, (atts & NORESOLUTION) ? -1 : res_x);
    append_fontname_num(&result, (atts & NORESOLUTION) ? -1 : res_y);
    append_fontname_str(&result, props->spacing);
    append_fontname_str(&result, 0);
    append_fontname_str(&result, props->end);

    return result;
}
#endif /* OPT_DEC_CHRSET */

/*
 * Case-independent comparison for font-names, including wildcards.
 * XLFD allows '?' as a wildcard, but we do not handle that (no one seems
 * to use it).
 */
static Bool
same_font_name(char *pattern, char *match)
{
    while (*pattern && *match) {
	if (*pattern == *match) {
	    pattern++;
	    match++;
	} else if (*pattern == '*' || *match == '*') {
	    if (same_font_name(pattern + 1, match)) {
		return True;
	    } else if (same_font_name(pattern, match + 1)) {
		return True;
	    } else {
		return False;
	    }
	} else {
	    int p = char2lower(*pattern++);
	    int m = char2lower(*match++);
	    if (p != m)
		return False;
	}
    }
    return (*pattern == *match);	/* both should be NUL */
}

/*
 * Double-check the fontname that we asked for versus what the font server
 * actually gave us.  The larger fixed fonts do not always have a matching bold
 * font, and the font server may try to scale another font or otherwise
 * substitute a mismatched font.
 *
 * If we cannot get what we requested, we will fallback to the original
 * behavior, which simulates bold by overstriking each character at one pixel
 * offset.
 */
static int
got_bold_font(Display * dpy, XFontStruct * fs, char *requested)
{
    char actual[MAX_FONTNAME];
    int got;

    if (get_font_name_props(dpy, fs, actual) == 0)
	got = 0;
    else
	got = same_font_name(requested, actual);
    return got;
}

/*
 * If the font server tries to adjust another font, it may not adjust it
 * properly.  Check that the bounding boxes are compatible.  Otherwise we'll
 * leave trash on the display when we mix normal and bold fonts.
 */
static int
same_font_size(XtermWidget xw, XFontStruct * nfs, XFontStruct * bfs)
{
    TRACE(("same_font_size height %d/%d, min %d/%d max %d/%d\n",
	   nfs->ascent + nfs->descent,
	   bfs->ascent + bfs->descent,
	   nfs->min_bounds.width, bfs->min_bounds.width,
	   nfs->max_bounds.width, bfs->max_bounds.width));
    return xw->screen.free_bold_box
	|| ((nfs->ascent + nfs->descent) == (bfs->ascent + bfs->descent)
	    && (nfs->min_bounds.width == bfs->min_bounds.width
		|| nfs->min_bounds.width == bfs->min_bounds.width + 1)
	    && (nfs->max_bounds.width == bfs->max_bounds.width
		|| nfs->max_bounds.width == bfs->max_bounds.width + 1));
}

/*
 * Check if the font looks like it has fixed width
 */
static int
is_fixed_font(XFontStruct * fs)
{
    if (fs)
	return (fs->min_bounds.width == fs->max_bounds.width);
    return 1;
}

/*
 * Check if the font looks like a double width font (i.e. contains
 * characters of width X and 2X
 */
#if OPT_WIDE_CHARS
static int
is_double_width_font(XFontStruct * fs)
{
    return ((2 * fs->min_bounds.width) == fs->max_bounds.width);
}
#else
#define is_double_width_font(fs) 0
#endif

#if OPT_WIDE_CHARS && OPT_RENDERFONT && defined(HAVE_TYPE_FCCHAR32)
#define HALF_WIDTH_TEST_STRING "1234567890"

/* '1234567890' in Chinese characters in UTF-8 */
#define FULL_WIDTH_TEST_STRING "\xe4\xb8\x80\xe4\xba\x8c\xe4\xb8\x89" \
                               "\xe5\x9b\x9b\xe4\xba\x94" \
			       "\xef\xa7\x91\xe4\xb8\x83\xe5\x85\xab" \
			       "\xe4\xb9\x9d\xef\xa6\xb2"

/* '1234567890' in Korean script in UTF-8 */
#define FULL_WIDTH_TEST_STRING2 "\xec\x9d\xbc\xec\x9d\xb4\xec\x82\xbc" \
                                "\xec\x82\xac\xec\x98\xa4" \
			        "\xec\x9c\xa1\xec\xb9\xa0\xed\x8c\x94" \
			        "\xea\xb5\xac\xec\x98\x81"

#define HALF_WIDTH_CHAR1  0x0031	/* '1' */
#define HALF_WIDTH_CHAR2  0x0057	/* 'W' */
#define FULL_WIDTH_CHAR1  0x4E00	/* CJK Ideograph 'number one' */
#define FULL_WIDTH_CHAR2  0xAC00	/* Korean script syllable 'Ka' */

static Bool
is_double_width_font_xft(Display * dpy, XftFont * font)
{
    XGlyphInfo gi1, gi2;
    FcChar32 c1 = HALF_WIDTH_CHAR1, c2 = HALF_WIDTH_CHAR2;
    char *fwstr = FULL_WIDTH_TEST_STRING;
    char *hwstr = HALF_WIDTH_TEST_STRING;

    /* Some Korean fonts don't have Chinese characters at all. */
    if (!XftCharExists(dpy, font, FULL_WIDTH_CHAR1)) {
	if (!XftCharExists(dpy, font, FULL_WIDTH_CHAR2))
	    return False;	/* Not a CJK font */
	else			/* a Korean font without CJK Ideographs */
	    fwstr = FULL_WIDTH_TEST_STRING2;
    }

    XftTextExtents32(dpy, font, &c1, 1, &gi1);
    XftTextExtents32(dpy, font, &c2, 1, &gi2);
    if (gi1.xOff != gi2.xOff)	/* Not a fixed-width font */
	return False;

    XftTextExtentsUtf8(dpy, font, (FcChar8 *) hwstr, (int) strlen(hwstr), &gi1);
    XftTextExtentsUtf8(dpy, font, (FcChar8 *) fwstr, (int) strlen(fwstr), &gi2);

    /*
     * fontconfig and Xft prior to 2.2(?) set the width of half-width
     * characters identical to that of full-width character in CJK double-width
     * (bi-width / monospace) font even though the former is half as wide as
     * the latter.  This was fixed sometime before the release of fontconfig
     * 2.2 in early 2003.  See
     *  http://bugzilla.mozilla.org/show_bug.cgi?id=196312
     * In the meantime, we have to check both possibilities.
     */
    return ((2 * gi1.xOff == gi2.xOff) || (gi1.xOff == gi2.xOff));
}
#else
#define is_double_width_font_xft(dpy, xftfont) 0
#endif

#define EmptyFont(fs) (fs != 0 \
		   && ((fs)->ascent + (fs)->descent == 0 \
		    || (fs)->max_bounds.width == 0))

#define FontSize(fs) (((fs)->ascent + (fs)->descent) \
		    *  (fs)->max_bounds.width)

const VTFontNames *
xtermFontName(char *normal)
{
    static VTFontNames data;
    memset(&data, 0, sizeof(data));
    data.f_n = normal;
    return &data;
}

static void
cache_menu_font_name(TScreen * screen, int fontnum, int which, const char *name)
{
    if (name != 0) {
	char *last = screen->menu_font_names[fontnum][which];
	if (last != 0) {
	    if (strcmp(last, name)) {
		free(last);
		TRACE(("caching menu fontname %d.%d %s\n", fontnum, which, name));
		screen->menu_font_names[fontnum][which] = x_strdup(name);
	    }
	} else {
	    TRACE(("caching menu fontname %d.%d %s\n", fontnum, which, name));
	    screen->menu_font_names[fontnum][which] = x_strdup(name);
	}
    }
}

/*
 * Open the given font and verify that it is non-empty.  Return a null on
 * failure.
 */
Bool
xtermOpenFont(XtermWidget xw, char *name, XTermFonts * result)
{
    Bool code = False;
    TScreen *screen = TScreenOf(xw);

    if (name != 0
	&& (result->fs = XLoadQueryFont(screen->display, name)) != 0) {
	code = True;
	if (EmptyFont(result->fs)) {
	    result = xtermCloseFont(xw, result);
	    code = False;
	} else {
	    result->fn = x_strdup(name);
	}
    }
    return code;
}

/*
 * Close the font and Free the font info
 */
XTermFonts *
xtermCloseFont(XtermWidget xw, XTermFonts * fnt)
{
    if (fnt != 0 && fnt->fs != 0) {
	TScreen *screen = TScreenOf(xw);

	clrCgsFonts(xw, WhichVWin(screen), fnt);
	XFreeFont(screen->display, fnt->fs);
	xtermFreeFontInfo(fnt);
    }
    return 0;
}

/*
 * Close the listed fonts, noting that some may use copies of the pointer.
 */
void
xtermCloseFonts(XtermWidget xw, XTermFonts * fnts)
{
    int j, k;

    for (j = 0; j < fMAX; ++j) {
	/*
	 * Need to save the pointer since xtermCloseFont zeroes it
	 */
	XFontStruct *thisFont = fnts[j].fs;
	if (thisFont != 0) {
	    xtermCloseFont(xw, &fnts[j]);
	    for (k = j + 1; k < fMAX; ++k) {
		if (thisFont == fnts[k].fs)
		    xtermFreeFontInfo(&fnts[k]);
	    }
	}
    }
}

/*
 * Make a copy of the source, assuming the XFontStruct's to be unique, but
 * ensuring that the names are reallocated to simplify freeing.
 */
void
xtermCopyFontInfo(XTermFonts * target, XTermFonts * source)
{
    xtermFreeFontInfo(target);
    target->chrset = source->chrset;
    target->flags = source->flags;
    target->fn = x_strdup(source->fn);
    target->fs = source->fs;
}

void
xtermFreeFontInfo(XTermFonts * target)
{
    target->chrset = 0;
    target->flags = 0;
    if (target->fn != 0) {
	free(target->fn);
	target->fn = 0;
    }
    target->fs = 0;
}

int
xtermLoadFont(XtermWidget xw,
	      const VTFontNames * fonts,
	      Bool doresize,
	      int fontnum)
{
    TScreen *screen = &(xw->screen);
    VTwin *win = WhichVWin(screen);

    VTFontNames myfonts;
    FontNameProperties *fp;
    XTermFonts fnts[fMAX];
    Pixel new_normal;
    Pixel new_revers;
    char *tmpname = NULL;
    char normal[MAX_FONTNAME];
    Bool proportional = False;

    memset(&myfonts, 0, sizeof(myfonts));
    memset(fnts, 0, sizeof(fnts));

    if (fonts != 0)
	myfonts = *fonts;
    if (myfonts.f_n == 0)
	return 0;

    if (fontnum == fontMenu_fontescape
	&& myfonts.f_n != screen->MenuFontName(fontnum)) {
	if ((tmpname = x_strdup(myfonts.f_n)) == 0)
	    return 0;
    }

    TRACE(("Begin Cgs - xtermLoadFont(%s)\n", myfonts.f_n));
    releaseWindowGCs(xw, win);

    TRACE(("xtermLoadFont #%d normal %s\n", fontnum, NonNull(myfonts.f_n)));
    TRACE(("xtermLoadFont #%d bold   %s\n", fontnum, NonNull(myfonts.f_b)));
#if OPT_WIDE_CHARS
    TRACE(("xtermLoadFont #%d wide   %s\n", fontnum, NonNull(myfonts.f_w)));
    TRACE(("xtermLoadFont #%d w/bold %s\n", fontnum, NonNull(myfonts.f_wb)));
#endif

    if (!xtermOpenFont(xw, myfonts.f_n, &fnts[fNorm]))
	goto bad;

    strcpy(normal, myfonts.f_n);
    if (myfonts.f_b == 0) {
	fp = get_font_name_props(screen->display, fnts[fNorm].fs, normal);
	if (fp != 0) {
	    myfonts.f_b = bold_font_name(fp, fp->average_width);
	    if (!xtermOpenFont(xw, myfonts.f_b, &fnts[fBold])) {
		myfonts.f_b = bold_font_name(fp, -1);
		(void) xtermOpenFont(xw, myfonts.f_b, &fnts[fBold]);
	    }
	    TRACE(("...derived bold %s\n", NonNull(myfonts.f_b)));
	}
	if (fp == 0 || fnts[fBold].fs == 0) {
	    xtermCopyFontInfo(&fnts[fBold], &fnts[fNorm]);
	    TRACE(("...cannot load a matching bold font\n"));
	} else if (same_font_size(xw, fnts[fNorm].fs, fnts[fBold].fs)
		   && got_bold_font(screen->display, fnts[fBold].fs, myfonts.f_b)) {
	    TRACE(("...got a matching bold font\n"));
	    cache_menu_font_name(screen, fontnum, fBold, myfonts.f_b);
	} else {
	    xtermCloseFont(xw, &fnts[fBold]);
	    fnts[fBold] = fnts[fNorm];
	    TRACE(("...did not get a matching bold font\n"));
	}
    } else if (!xtermOpenFont(xw, myfonts.f_b, &fnts[fBold])) {
	xtermCopyFontInfo(&fnts[fBold], &fnts[fNorm]);
	TRACE(("...cannot load bold font %s\n", NonNull(myfonts.f_b)));
    } else {
	cache_menu_font_name(screen, fontnum, fBold, myfonts.f_b);
    }

    /*
     * If there is no widefont specified, fake it by doubling AVERAGE_WIDTH
     * of normal fonts XLFD, and asking for it.  This plucks out 18x18ja
     * and 12x13ja as the corresponding fonts for 9x18 and 6x13.
     */
    if_OPT_WIDE_CHARS(screen, {
	Bool derived;
	char bold[MAX_FONTNAME];

	if (myfonts.f_w != 0) {
	    cache_menu_font_name(screen, fontnum, fWide, myfonts.f_w);
	} else if (!is_double_width_font(fnts[fNorm].fs)) {
	    fp = get_font_name_props(screen->display, fnts[fNorm].fs, normal);
	    if (fp != 0) {
		myfonts.f_w = wide_font_name(fp);
		TRACE(("...derived wide %s\n", NonNull(myfonts.f_w)));
		cache_menu_font_name(screen, fontnum, fWide, myfonts.f_w);
	    }
	}

	if (myfonts.f_w) {
	    (void) xtermOpenFont(xw, myfonts.f_w, &fnts[fWide]);
	} else {
	    xtermCopyFontInfo(&fnts[fWide], &fnts[fNorm]);
	}

	derived = False;
	if (myfonts.f_wb == 0) {
	    fp = get_font_name_props(screen->display, fnts[fBold].fs, bold);
	    if (fp != 0) {
		myfonts.f_wb = widebold_font_name(fp);
		derived = True;
	    }
	}

	if (myfonts.f_wb) {

	    (void) xtermOpenFont(xw, myfonts.f_wb, &fnts[fWBold]);

	    if (derived
		&& !compatibleWideCounts(fnts[fWide].fs, fnts[fWBold].fs)) {
		xtermCloseFont(xw, &fnts[fWBold]);
	    }
	    if (fnts[fWBold].fs == 0) {
		myfonts.f_wb = myfonts.f_w;
		xtermCopyFontInfo(&fnts[fWBold], &fnts[fWide]);
		TRACE(("...cannot load wide-bold, use wide %s\n", NonNull(myfonts.f_w)));
	    } else {
		TRACE(("...%s wide/bold %s\n",
		       derived ? "derived" : "given",
		       NonNull(myfonts.f_wb)));
		cache_menu_font_name(screen, fontnum, fWBold, myfonts.f_wb);
	    }
	} else if (is_double_width_font(fnts[fBold].fs)) {
	    xtermCopyFontInfo(&fnts[fWBold], &fnts[fBold]);
	    TRACE(("...bold font is double-width, use it %s\n", NonNull(myfonts.f_b)));
	} else {
	    xtermCopyFontInfo(&fnts[fWBold], &fnts[fWide]);
	    TRACE(("...cannot load wide bold font, use wide %s\n", NonNull(myfonts.f_w)));
	}

	if (EmptyFont(fnts[fWBold].fs))
	    goto bad;		/* can't use a 0-sized font */
    });

    /*
     * Most of the time this call to load the font will succeed, even if
     * there is no wide font :  the X server doubles the width of the
     * normal font, or similar.
     *
     * But if it did fail for some reason, then nevermind.
     */
    if (EmptyFont(fnts[fBold].fs))
	goto bad;		/* can't use a 0-sized font */

    if (!same_font_size(xw, fnts[fNorm].fs, fnts[fBold].fs)
	&& (is_fixed_font(fnts[fNorm].fs) && is_fixed_font(fnts[fBold].fs))) {
	TRACE(("...ignoring mismatched normal/bold fonts\n"));
	xtermCloseFont(xw, &fnts[fBold]);
	xtermCopyFontInfo(&fnts[fBold], &fnts[fNorm]);
    }

    if_OPT_WIDE_CHARS(screen, {
	if (fnts[fWide].fs != 0
	    && fnts[fWBold].fs != 0
	    && !same_font_size(xw, fnts[fWide].fs, fnts[fWBold].fs)
	    && (is_fixed_font(fnts[fWide].fs) && is_fixed_font(fnts[fWBold].fs))) {
	    TRACE(("...ignoring mismatched normal/bold wide fonts\n"));
	    xtermCloseFont(xw, &fnts[fWBold]);
	    xtermCopyFontInfo(&fnts[fWBold], &fnts[fWide]);
	}
    });

    /*
     * Normal/bold fonts should be the same width.  Also, the min/max
     * values should be the same.
     */
    if (!is_fixed_font(fnts[fNorm].fs)
	|| !is_fixed_font(fnts[fBold].fs)
	|| fnts[fNorm].fs->max_bounds.width != fnts[fBold].fs->max_bounds.width) {
	TRACE(("Proportional font! normal %d/%d, bold %d/%d\n",
	       fnts[fNorm].fs->min_bounds.width,
	       fnts[fNorm].fs->max_bounds.width,
	       fnts[fBold].fs->min_bounds.width,
	       fnts[fBold].fs->max_bounds.width));
	proportional = True;
    }

    if_OPT_WIDE_CHARS(screen, {
	if (fnts[fWide].fs != 0
	    && fnts[fWBold].fs != 0
	    && (!is_fixed_font(fnts[fWide].fs)
		|| !is_fixed_font(fnts[fWBold].fs)
		|| fnts[fWide].fs->max_bounds.width != fnts[fWBold].fs->max_bounds.width)) {
	    TRACE(("Proportional font! wide %d/%d, wide bold %d/%d\n",
		   fnts[fWide].fs->min_bounds.width,
		   fnts[fWide].fs->max_bounds.width,
		   fnts[fWBold].fs->min_bounds.width,
		   fnts[fWBold].fs->max_bounds.width));
	    proportional = True;
	}
    });

    /* TODO : enforce that the width of the wide font is 2* the width
       of the narrow font */

    /*
     * If we're switching fonts, free the old ones.  Otherwise we'll leak
     * the memory that is associated with the old fonts.  The
     * XLoadQueryFont call allocates a new XFontStruct.
     */
    xtermCloseFonts(xw, screen->fnts);

    xtermCopyFontInfo(&(screen->fnts[fNorm]), &fnts[fNorm]);
    xtermCopyFontInfo(&(screen->fnts[fBold]), &fnts[fBold]);
#if OPT_WIDE_CHARS
    xtermCopyFontInfo(&(screen->fnts[fWide]), &fnts[fWide]);
    if (fnts[fWBold].fs == NULL)
	xtermCopyFontInfo(&fnts[fWBold], &fnts[fWide]);
    xtermCopyFontInfo(&(screen->fnts[fWBold]), &fnts[fWBold]);
#endif

    new_normal = getXtermForeground(xw, xw->flags, xw->cur_foreground);
    new_revers = getXtermBackground(xw, xw->flags, xw->cur_background);

    setCgsFore(xw, win, gcNorm, new_normal);
    setCgsBack(xw, win, gcNorm, new_revers);
    setCgsFont(xw, win, gcNorm, &(screen->fnts[fNorm]));

    copyCgs(xw, win, gcBold, gcNorm);
    setCgsFont(xw, win, gcBold, &(screen->fnts[fBold]));

    setCgsFore(xw, win, gcNormReverse, new_revers);
    setCgsBack(xw, win, gcNormReverse, new_normal);
    setCgsFont(xw, win, gcNormReverse, &(screen->fnts[fNorm]));

    copyCgs(xw, win, gcBoldReverse, gcNormReverse);
    setCgsFont(xw, win, gcBoldReverse, &(screen->fnts[fBold]));

    if_OPT_WIDE_CHARS(screen, {
	if (screen->fnts[fWide].fs != 0
	    && screen->fnts[fWBold].fs != 0) {
	    setCgsFore(xw, win, gcWide, new_normal);
	    setCgsBack(xw, win, gcWide, new_revers);
	    setCgsFont(xw, win, gcWide, &(screen->fnts[fWide]));

	    copyCgs(xw, win, gcWBold, gcWide);
	    setCgsFont(xw, win, gcWBold, &(screen->fnts[fWBold]));

	    setCgsFore(xw, win, gcWideReverse, new_revers);
	    setCgsBack(xw, win, gcWideReverse, new_normal);
	    setCgsFont(xw, win, gcWideReverse, &(screen->fnts[fWide]));

	    copyCgs(xw, win, gcWBoldReverse, gcWideReverse);
	    setCgsFont(xw, win, gcWBoldReverse, &(screen->fnts[fWBold]));
	}
    });

    screen->fnt_prop = proportional;
    screen->fnt_boxes = True;

#if OPT_BOX_CHARS
    /*
     * Xterm uses character positions 1-31 of a font for the line-drawing
     * characters.  Check that they are all present.  The null character
     * (0) is special, and is not used.
     */
#if OPT_RENDERFONT
    if (UsingRenderFont(xw)) {
	/*
	 * FIXME: we shouldn't even be here if we're using Xft.
	 */
	screen->fnt_boxes = False;
	TRACE(("assume Xft missing line-drawing chars\n"));
    } else
#endif
    {
	unsigned ch;

	for (ch = 1; ch < 32; ch++) {
	    unsigned n = ch;
#if OPT_WIDE_CHARS
	    if (screen->utf8_mode || screen->unicode_font) {
		n = dec2ucs(ch);
		if (n == UCS_REPL)
		    continue;
	    }
#endif
	    if (xtermMissingChar(xw, n, fnts[fNorm].fs)) {
		TRACE(("missing normal char #%d\n", n));
		screen->fnt_boxes = False;
		break;
	    }
	    if (xtermMissingChar(xw, n, fnts[fBold].fs)) {
		TRACE(("missing bold char #%d\n", n));
		screen->fnt_boxes = False;
		break;
	    }
	}
    }
    TRACE(("Will %suse internal line-drawing characters\n",
	   screen->fnt_boxes ? "not " : ""));
#endif

    if (screen->always_bold_mode) {
	screen->enbolden = screen->bold_mode;
    } else {
	screen->enbolden = screen->bold_mode
	    && ((fnts[fNorm].fs == fnts[fBold].fs)
		|| same_font_name(normal, myfonts.f_b));
    }
    TRACE(("Will %suse 1-pixel offset/overstrike to simulate bold\n",
	   screen->enbolden ? "" : "not "));

    set_menu_font(False);
    screen->menu_font_number = fontnum;
    set_menu_font(True);
    if (tmpname) {		/* if setting escape or sel */
	if (screen->MenuFontName(fontnum))
	    free(screen->MenuFontName(fontnum));
	screen->MenuFontName(fontnum) = tmpname;
	if (fontnum == fontMenu_fontescape) {
	    SetItemSensitivity(fontMenuEntries[fontMenu_fontescape].widget,
			       True);
	}
#if OPT_SHIFT_FONTS
	screen->menu_font_sizes[fontnum] = FontSize(fnts[fNorm].fs);
#endif
    }
    set_cursor_gcs(xw);
    xtermUpdateFontInfo(xw, doresize);
    TRACE(("Success Cgs - xtermLoadFont\n"));
    return 1;

  bad:
    if (tmpname)
	free(tmpname);
    releaseWindowGCs(xw, win);

    xtermCloseFonts(xw, fnts);
    TRACE(("Fail Cgs - xtermLoadFont\n"));
    return 0;
}

#if OPT_LOAD_VTFONTS || OPT_WIDE_CHARS
/*
 * Collect font-names that we can modify with the load-vt-fonts() action.
 */
typedef struct {
    VTFontNames default_font;
    char *menu_font_names[fontMenu_lastBuiltin + 1][fMAX];
} SubResourceRec;

#define MERGE_SUBFONT(src,dst,name) \
	if (dst.name == 0) { \
	    TRACE(("MERGE_SUBFONT " #dst "." #name " merge %s\n", NonNull(src.name))); \
	    dst.name = src.name; \
	} else { \
	    TRACE(("MERGE_SUBFONT " #dst "." #name " found %s\n", NonNull(dst.name))); \
	}

#define COPY_MENU_FONTS(src,dst) \
	TRACE(("COPY_MENU_FONTS " #src " to " #dst "\n")); \
	for (n = fontMenu_default; n <= fontMenu_lastBuiltin; ++n) { \
	    for (m = 0; m < fMAX; ++m) { \
		dst.menu_font_names[n][m] = src.menu_font_names[n][m]; \
	    } \
	}

/*
 * Load the "VT" font names from the given subresource name/class.  These
 * correspond to the VT100 resources.
 */
static Bool
xtermLoadVTFonts(XtermWidget w, char *myName, char *myClass)
{
    static Bool initialized = False;
    static SubResourceRec original, referenceRec, subresourceRec;

    /*
     * These are duplicates of the VT100 font resources, but with a special
     * application/classname passed in to distinguish them.
     */
    static XtResource font_resources[] =
    {
	Sres(XtNfont, XtCFont, default_font.f_n, DEFFONT),
	Sres(XtNboldFont, XtCBoldFont, default_font.f_b, DEFBOLDFONT),
#if OPT_WIDE_CHARS
	Sres(XtNwideFont, XtCWideFont, default_font.f_w, DEFWIDEFONT),
	Sres(XtNwideBoldFont, XtCWideBoldFont, default_font.f_wb, DEFWIDEBOLDFONT),
#endif
	Sres(XtNfont1, XtCFont1, MenuFontName(fontMenu_font1), NULL),
	Sres(XtNfont2, XtCFont2, MenuFontName(fontMenu_font2), NULL),
	Sres(XtNfont3, XtCFont3, MenuFontName(fontMenu_font3), NULL),
	Sres(XtNfont4, XtCFont4, MenuFontName(fontMenu_font4), NULL),
	Sres(XtNfont5, XtCFont5, MenuFontName(fontMenu_font5), NULL),
	Sres(XtNfont6, XtCFont6, MenuFontName(fontMenu_font6), NULL),
    };
    Cardinal n, m;
    Bool status = True;

    if (!initialized) {

	initialized = True;
	TRACE(("xtermLoadVTFonts saving original\n"));
	original.default_font = w->misc.default_font;
	COPY_MENU_FONTS(w->screen, original);
    }

    if (myName == 0 || *myName == 0) {
	TRACE(("xtermLoadVTFonts restoring original\n"));
	w->misc.default_font = original.default_font;
	COPY_MENU_FONTS(original, w->screen);
	for (n = 0; n < XtNumber(original.menu_font_names); ++n)
	    w->screen.MenuFontName(n) = original.MenuFontName(n);
    } else {
	TRACE(("xtermLoadVTFonts(%s, %s)\n", myName, myClass));

	memset(&subresourceRec, 0, sizeof(subresourceRec));
	XtGetSubresources((Widget) w, (XtPointer) &subresourceRec,
			  myName, myClass,
			  font_resources,
			  (Cardinal) XtNumber(font_resources),
			  NULL, (Cardinal) 0);

	if (memcmp(&referenceRec, &subresourceRec, sizeof(referenceRec))) {

	    /*
	     * If a particular resource value was not found, use the original.
	     */
	    MERGE_SUBFONT(w->misc, subresourceRec, default_font.f_n);
	    MERGE_SUBFONT(w->misc, subresourceRec, default_font.f_b);
#if OPT_WIDE_CHARS
	    MERGE_SUBFONT(w->misc, subresourceRec, default_font.f_w);
	    MERGE_SUBFONT(w->misc, subresourceRec, default_font.f_wb);
#endif
	    for (n = fontMenu_font1; n <= fontMenu_lastBuiltin; ++n)
		MERGE_SUBFONT(w->screen, subresourceRec, MenuFontName(n));

	    /*
	     * Finally, copy the subresource data to the widget.
	     */
	    w->misc.default_font = subresourceRec.default_font;
	    COPY_MENU_FONTS(subresourceRec, w->screen);
	    w->screen.MenuFontName(fontMenu_default) = w->misc.default_font.f_n;
	} else {
	    TRACE(("...no resources found\n"));
	    status = False;
	}
    }
    return status;
}

#if OPT_WIDE_CHARS
static Bool
isWideFont(XFontStruct * fp, char *tag, Bool nullOk)
{
    Bool result = False;

    (void) tag;
    if (okFont(fp)) {
	unsigned count = countGlyphs(fp);
	TRACE(("isWideFont(%s) found %d cells\n", tag, count));
	result = (count > 256) ? True : False;
    } else {
	result = nullOk;
    }
    return result;
}

/*
 * If the current fonts are not wide, load the UTF8 fonts.
 *
 * Called during initialization (for wide-character mode), the fonts have not
 * been setup, so we pass nullOk=True to isWideFont().
 *
 * Called after initialization, e.g., in response to the UTF-8 menu entry
 * (starting from narrow character mode), it checks if the fonts are not wide.
 */
Bool
xtermLoadWideFonts(XtermWidget xw, Bool nullOk)
{
    TScreen *screen = &(xw->screen);
    Bool result;

    if (EmptyFont(screen->fnts[fWide].fs)) {
	result = (isWideFont(screen->fnts[fNorm].fs, "normal", nullOk)
		  && isWideFont(screen->fnts[fBold].fs, "bold", nullOk));
    } else {
	result = (isWideFont(screen->fnts[fWide].fs, "wide", nullOk)
		  && isWideFont(screen->fnts[fWBold].fs, "wide-bold", nullOk));
	if (result && !screen->utf8_latin1) {
	    result = (isWideFont(screen->fnts[fNorm].fs, "normal", nullOk)
		      && isWideFont(screen->fnts[fBold].fs, "bold", nullOk));
	}
    }
    if (!result) {
	TRACE(("current fonts are not all wide%s\n", nullOk ? " nullOk" : ""));
	result = xtermLoadVTFonts(xw, "utf8Fonts", "Utf8Fonts");
    }
    TRACE(("xtermLoadWideFonts:%d\n", result));
    return result;
}
#endif /* OPT_WIDE_CHARS */

/*
 * Restore the default fonts, i.e., if we had switched to wide-fonts.
 */
Bool
xtermLoadDefaultFonts(XtermWidget w)
{
    Bool result;
    result = xtermLoadVTFonts(w, NULL, NULL);
    TRACE(("xtermLoadDefaultFonts:%d\n", result));
    return result;
}
#endif /* OPT_LOAD_VTFONTS || OPT_WIDE_CHARS */

#if OPT_LOAD_VTFONTS
void
HandleLoadVTFonts(Widget w,
		  XEvent * event GCC_UNUSED,
		  String * params GCC_UNUSED,
		  Cardinal *param_count GCC_UNUSED)
{
    static char empty[] = "";	/* appease strict compilers */

    if (IsXtermWidget(w)) {
	XtermWidget xw = (XtermWidget) w;
	char buf[80];
	char *myName = (*param_count > 0) ? params[0] : empty;
	char *convert = (*param_count > 1) ? params[1] : myName;
	char *myClass = (char *) MyStackAlloc(strlen(convert), buf);
	int n;

	TRACE(("HandleLoadVTFonts(%d)\n", *param_count));
	strcpy(myClass, convert);
	if (*param_count == 1
	    && islower(CharOf(myClass[0])))
	    myClass[0] = toupper(CharOf(myClass[0]));

	if (xtermLoadVTFonts(xw, myName, myClass)) {
	    /*
	     * When switching fonts, try to preserve the font-menu selection, since
	     * it is less surprising to do that (if the font-switching can be
	     * undone) than to switch to "Default".
	     */
	    int font_number = xw->screen.menu_font_number;
	    if (font_number > fontMenu_lastBuiltin)
		font_number = fontMenu_lastBuiltin;
	    for (n = 0; n < NMENUFONTS; ++n)
		xw->screen.menu_font_sizes[n] = 0;
	    SetVTFont(xw, font_number, True,
		      ((font_number == fontMenu_default)
		       ? &(xw->misc.default_font)
		       : NULL));
	}

	MyStackFree(myClass, buf);
    }
}
#endif /* OPT_LOAD_VTFONTS */

/*
 * Set the limits for the box that outlines the cursor.
 */
void
xtermSetCursorBox(TScreen * screen)
{
    static XPoint VTbox[NBOX];
    XPoint *vp;

    vp = &VTbox[1];
    (vp++)->x = FontWidth(screen) - 1;
    (vp++)->y = FontHeight(screen) - 1;
    (vp++)->x = -(FontWidth(screen) - 1);
    vp->y = -(FontHeight(screen) - 1);
    screen->box = VTbox;
}

#define CACHE_XFT(dst,src) if (src != 0) {\
	    dst[fontnum] = src;\
	    TRACE(("%s[%d] = %d (%d,%d) by %d\n",\
		#dst,\
	    	fontnum,\
		src->height,\
		src->ascent,\
		src->descent,\
		src->max_advance_width));\
	}

#if OPT_RENDERFONT
static XftFont *
xtermOpenXft(Display * dpy, XftPattern * pat, const char *tag GCC_UNUSED)
{
    XftPattern *match;
    XftResult status;
    XftFont *result = 0;

    if (pat != 0) {
	match = XftFontMatch(dpy, DefaultScreen(dpy), pat, &status);
	if (match != 0) {
	    result = XftFontOpenPattern(dpy, match);
	    if (result != 0) {
		TRACE(("...matched %s font\n", tag));
	    } else {
		TRACE(("...could did not open %s font\n", tag));
		XftPatternDestroy(match);
	    }
	} else {
	    TRACE(("...did not match %s font\n", tag));
	}
    }
    return result;
}
#endif

#if OPT_RENDERFONT
#if OPT_SHIFT_FONTS
/*
 * Don't make a dependency on the math library for a single function.
 * (Newton Raphson).
 */
static double
mySquareRoot(double value)
{
    double result = 0.0;
    if (value > 0.0) {
	int n;
	double older = value;
	for (n = 0; n < 10; ++n) {
	    double delta = (older * older - value) / (2.0 * older);
	    double newer = older - delta;
	    older = newer;
	    result = newer;
	    if (delta > -0.001 && delta < 0.001)
		break;
	}
    }
    return result;
}
#endif

/*
 * Given the Xft font metrics, determine the actual font size.  This is used
 * for each font to ensure that normal, bold and italic fonts follow the same
 * rule.
 */
static void
setRenderFontsize(TScreen * screen, VTwin * win, XftFont * font, const char *tag)
{
    if (font != 0) {
	int width, height, ascent, descent;

	(void) screen;

	width = font->max_advance_width;
	height = font->height;
	ascent = font->ascent;
	descent = font->descent;
	if (height < ascent + descent) {
	    TRACE(("...increase height from %d\n", height));
	    height = ascent + descent;
	}
	if (is_double_width_font_xft(screen->display, font)) {
	    TRACE(("...reduced width from %d\n", width));
	    width >>= 1;
	}
	if (tag == 0) {
	    win->f_width = width;
	    win->f_height = height;
	    win->f_ascent = ascent;
	    win->f_descent = descent;
	    TRACE(("setRenderFontsize result %dx%d (%d+%d)\n",
		   width, height, ascent, descent));
	} else if (win->f_width < width ||
		   win->f_height < height ||
		   win->f_ascent < ascent ||
		   win->f_descent < descent) {
	    TRACE(("setRenderFontsize %s changed %dx%d (%d+%d) to %dx%d (%d+%d)\n",
		   tag,
		   win->f_width, win->f_height, win->f_ascent, win->f_descent,
		   width, height, ascent, descent));

	    win->f_width = width;
	    win->f_height = height;
	    win->f_ascent = ascent;
	    win->f_descent = descent;
	} else {
	    TRACE(("setRenderFontsize %s unchanged\n", tag));
	}
    }
}
#endif

/*
 * Compute useful values for the font/window sizes
 */
void
xtermComputeFontInfo(XtermWidget xw,
		     VTwin * win,
		     XFontStruct * font,
		     int sbwidth)
{
    TScreen *screen = &(xw->screen);

    int i, j, width, height;

#if OPT_RENDERFONT
    /*
     * xterm contains a lot of references to fonts, assuming they are fixed
     * size.  This chunk of code overrides the actual font-selection (see
     * drawXtermText()), if the user has selected render-font.  All of the
     * font-loading for fixed-fonts still goes on whether or not this chunk
     * overrides it.
     */
    if (xw->misc.render_font && !IsIconWin(screen, win)) {
	Display *dpy = screen->display;
	int fontnum = screen->menu_font_number;
	XftFont *norm = screen->renderFontNorm[fontnum];
	XftFont *bold = screen->renderFontBold[fontnum];
	XftFont *ital = screen->renderFontItal[fontnum];
#if OPT_RENDERWIDE
	XftFont *wnorm = screen->renderWideNorm[fontnum];
	XftFont *wbold = screen->renderWideBold[fontnum];
	XftFont *wital = screen->renderWideItal[fontnum];
#endif

	if (norm == 0 && xw->misc.face_name) {
	    XftPattern *pat;
	    double face_size = xw->misc.face_size[fontnum];

	    TRACE(("xtermComputeFontInfo norm(face %s, size %f)\n",
		   xw->misc.face_name,
		   xw->misc.face_size[fontnum]));

	    if (face_size <= 0.0) {
#if OPT_SHIFT_FONTS
		/*
		 * If the user is switching font-sizes, make it follow by
		 * default the same ratios to the default as the fixed fonts
		 * would, for easy comparison.  There will be some differences
		 * since the fixed fonts have a variety of height/width ratios,
		 * but this is simpler than adding another resource value - and
		 * as noted above, the data for the fixed fonts are available.
		 */
		lookupOneFontSize(xw, 0);
		lookupOneFontSize(xw, fontnum);
		if (fontnum == fontMenu_default) {
		    face_size = 14.0;
		} else {
		    double ratio;
		    int num = screen->menu_font_sizes[fontnum];
		    int den = screen->menu_font_sizes[0];

		    if (den <= 0)
			den = 1;
		    ratio = mySquareRoot((1.0 * num) / den);

		    face_size = (ratio * xw->misc.face_size[0]);
		    TRACE(("scaled using %3d/%d = %.2f -> %f\n",
			   num, den, ratio, face_size));
		}
#else
		switch (fontnum) {
		case fontMenu_font1:
		    face_size = 8.0;
		    break;
		case fontMenu_font2:
		    face_size = 10.0;
		    break;
		case fontMenu_font3:
		    face_size = 12.0;
		    break;
		default:
		    face_size = 14.0;
		    break;
		case fontMenu_font4:
		    face_size = 16.0;
		    break;
		case fontMenu_font5:
		    face_size = 18.0;
		    break;
		case fontMenu_font6:
		    face_size = 20.0;
		    break;
		}
#endif
		xw->misc.face_size[fontnum] = face_size;
	    }

	    /*
	     * By observation (there is no documentation), XftPatternBuild is
	     * cumulative.  Build the bold- and italic-patterns on top of the
	     * normal pattern.
	     */
#define NormXftPattern \
	    XFT_FAMILY, XftTypeString, "mono", \
	    XFT_SIZE, XftTypeDouble, face_size, \
	    XFT_SPACING, XftTypeInteger, XFT_MONO

#define BoldXftPattern(norm) \
	    XFT_WEIGHT, XftTypeInteger, XFT_WEIGHT_BOLD, \
	    XFT_CHAR_WIDTH, XftTypeInteger, norm->max_advance_width

#define ItalXftPattern(norm) \
	    XFT_SLANT, XftTypeInteger, XFT_SLANT_ITALIC, \
	    XFT_CHAR_WIDTH, XftTypeInteger, norm->max_advance_width

	    if ((pat = XftNameParse(xw->misc.face_name)) != 0) {
		XftPatternBuild(pat,
				NormXftPattern,
				(void *) 0);
		norm = xtermOpenXft(dpy, pat, "normal");

		if (norm != 0) {
		    XftPatternBuild(pat,
				    BoldXftPattern(norm),
				    (void *) 0);
		    bold = xtermOpenXft(dpy, pat, "bold");

#if OPT_ISO_COLORS
		    if (screen->italicULMode
			&& (pat = XftNameParse(xw->misc.face_name)) != 0) {
			XftPatternBuild(pat,
					NormXftPattern,
					ItalXftPattern(norm),
					(void *) 0);
			ital = xtermOpenXft(dpy, pat, "italic");
		    }
#endif /* OPT_ISO_COLORS */

		    /*
		     * FIXME:  just assume that the corresponding font has no
		     * graphics characters.
		     */
		    if (screen->fnt_boxes) {
			screen->fnt_boxes = False;
			TRACE(("Xft opened - will %suse internal line-drawing characters\n",
			       screen->fnt_boxes ? "not " : ""));
		    }
		}

		XftPatternDestroy(pat);
	    }

	    CACHE_XFT(screen->renderFontNorm, norm);
	    CACHE_XFT(screen->renderFontBold, bold);
	    CACHE_XFT(screen->renderFontItal, ital);

	    /*
	     * See xtermXftDrawString().
	     */
#if OPT_RENDERWIDE
	    if (norm != 0 && screen->wide_chars) {
		char *face_name = (xw->misc.face_wide_name
				   ? xw->misc.face_wide_name
				   : xw->misc.face_name);
		int char_width = norm->max_advance_width * 2;

		TRACE(("xtermComputeFontInfo wide(face %s, char_width %d)\n",
		       face_name,
		       char_width));

#define WideXftPattern \
		XFT_FAMILY, XftTypeString, "mono", \
		XFT_SIZE, XftTypeDouble, face_size, \
		XFT_SPACING, XftTypeInteger, XFT_MONO

		if ((pat = XftNameParse(face_name)) != 0) {
		    XftPatternBuild(pat,
				    WideXftPattern,
				    XFT_CHAR_WIDTH, XftTypeInteger, char_width,
				    (void *) 0);
		    wnorm = xtermOpenXft(dpy, pat, "wide");

		    if (wnorm != 0) {
			XftPatternBuild(pat,
					WideXftPattern,
					BoldXftPattern(wnorm),
					(void *) 0);
			wbold = xtermOpenXft(dpy, pat, "wide-bold");

#if OPT_ISO_COLORS
			if (screen->italicULMode
			    && (pat = XftNameParse(face_name)) != 0) {
			    XftPatternBuild(pat,
					    WideXftPattern,
					    ItalXftPattern(wnorm),
					    (void *) 0);
			    wital = xtermOpenXft(dpy, pat, "wide-italic");
			}
#endif
		    }
		    XftPatternDestroy(pat);
		}

		CACHE_XFT(screen->renderWideNorm, wnorm);
		CACHE_XFT(screen->renderWideBold, wbold);
		CACHE_XFT(screen->renderWideItal, wital);
	    }
#endif /* OPT_RENDERWIDE */
	}
	if (norm == 0) {
	    xw->misc.render_font = False;
	    update_font_renderfont();
	    /* now we will fall through into the bitmap fonts */
	} else {
	    setRenderFontsize(screen, win, norm, NULL);
	    setRenderFontsize(screen, win, bold, "bold");
	    setRenderFontsize(screen, win, ital, "ital");
	}
    }
    /*
     * Are we handling a bitmap font?
     */
    if (!xw->misc.render_font || IsIconWin(screen, win))
#endif /* OPT_RENDERFONT */
    {
	if (is_double_width_font(font)) {
	    win->f_width = (font->min_bounds.width);
	} else {
	    win->f_width = (font->max_bounds.width);
	}
	win->f_height = (font->ascent + font->descent);
	win->f_ascent = font->ascent;
	win->f_descent = font->descent;
    }
    i = 2 * screen->border + sbwidth;
    j = 2 * screen->border;
    width = MaxCols(screen) * win->f_width + i;
    height = MaxRows(screen) * win->f_height + j;
    win->fullwidth = width;
    win->fullheight = height;
    win->width = width - i;
    win->height = height - j;

    TRACE(("xtermComputeFontInfo window %dx%d (full %dx%d), fontsize %dx%d (asc %d, dsc %d)\n",
	   win->height,
	   win->width,
	   win->fullheight,
	   win->fullwidth,
	   win->f_height,
	   win->f_width,
	   win->f_ascent,
	   win->f_descent));
}

/* save this information as a side-effect for double-sized characters */
void
xtermSaveFontInfo(TScreen * screen, XFontStruct * font)
{
    screen->fnt_wide = (font->max_bounds.width);
    screen->fnt_high = (font->ascent + font->descent);
    TRACE(("xtermSaveFontInfo %dx%d\n", screen->fnt_high, screen->fnt_wide));
}

/*
 * After loading a new font, update the structures that use its size.
 */
void
xtermUpdateFontInfo(XtermWidget xw, Bool doresize)
{
    TScreen *screen = &(xw->screen);

    int scrollbar_width;
    VTwin *win = &(screen->fullVwin);

    scrollbar_width = (xw->misc.scrollbar
		       ? (screen->scrollWidget->core.width +
			  BorderWidth(screen->scrollWidget))
		       : 0);
    xtermComputeFontInfo(xw, win, screen->fnts[fNorm].fs, scrollbar_width);
    xtermSaveFontInfo(screen, screen->fnts[fNorm].fs);

    if (doresize) {
	if (VWindow(screen)) {
	    xtermClear(xw);
	}
	TRACE(("xtermUpdateFontInfo {{\n"));
	DoResizeScreen(xw);	/* set to the new natural size */
	if (screen->scrollWidget)
	    ResizeScrollBar(xw);
	Redraw();
	TRACE(("... }} xtermUpdateFontInfo\n"));
#ifdef SCROLLBAR_RIGHT
	updateRightScrollbar(xw);
#endif
    }
    xtermSetCursorBox(screen);
}

#if OPT_BOX_CHARS

/*
 * Returns true if the given character is missing from the specified font.
 */
Bool
xtermMissingChar(XtermWidget xw, unsigned ch, XFontStruct * font)
{
    if (font != 0
	&& font->per_char != 0
	&& !font->all_chars_exist) {
	static XCharStruct dft, *tmp = &dft, *pc = 0;

	if (font->max_byte1 == 0) {
#if OPT_WIDE_CHARS
	    if (ch > 255) {
		TRACE(("xtermMissingChar %#04x (row)\n", ch));
		return True;
	    }
#endif
	    CI_GET_CHAR_INFO_1D(font, E2A(ch), tmp, pc);
	}
#if OPT_WIDE_CHARS
	else {
	    CI_GET_CHAR_INFO_2D(font, HI_BYTE(ch), LO_BYTE(ch), tmp, pc);
	}
#else

	if (!pc)
	    return False;	/* Urgh! */
#endif

	if (CI_NONEXISTCHAR(pc)) {
	    TRACE(("xtermMissingChar %#04x (!exists)\n", ch));
	    return True;
	}
    }
    if (xtermIsDecGraphic(ch)
	&& xw->screen.force_box_chars) {
	TRACE(("xtermMissingChar %#04x (forced off)\n", ch));
	return True;
    }
    return False;
}

/*
 * The grid is arbitrary, enough resolution that nothing's lost in
 * initialization.
 */
#define BOX_HIGH 60
#define BOX_WIDE 60

#define MID_HIGH (BOX_HIGH/2)
#define MID_WIDE (BOX_WIDE/2)

#define CHR_WIDE ((9*BOX_WIDE)/10)
#define CHR_HIGH ((9*BOX_HIGH)/10)

/*
 * ...since we'll scale the values anyway.
 */
#define SCALE_X(n) n = (n * (font_width-1)) / (BOX_WIDE-1)
#define SCALE_Y(n) n = (n * (font_height-1)) / (BOX_HIGH-1)

#define SEG(x0,y0,x1,y1) x0,y0, x1,y1

/*
 * Draw the given graphic character, if it is simple enough (i.e., a
 * line-drawing character).
 */
void
xtermDrawBoxChar(XtermWidget xw,
		 unsigned ch,
		 unsigned flags,
		 GC gc,
		 int x,
		 int y,
		 int cells)
{
    TScreen *screen = &(xw->screen);
    /* *INDENT-OFF* */
    static const short glyph_ht[] = {
	SEG(1*BOX_WIDE/10,  0,		1*BOX_WIDE/10,5*MID_HIGH/6),	/* H */
	SEG(6*BOX_WIDE/10,  0,		6*BOX_WIDE/10,5*MID_HIGH/6),
	SEG(1*BOX_WIDE/10,5*MID_HIGH/12,6*BOX_WIDE/10,5*MID_HIGH/12),
	SEG(2*BOX_WIDE/10,  MID_HIGH,	  CHR_WIDE,	MID_HIGH),	/* T */
	SEG(6*BOX_WIDE/10,  MID_HIGH,	6*BOX_WIDE/10,	CHR_HIGH),
	-1
    }, glyph_ff[] = {
	SEG(1*BOX_WIDE/10,  0,		6*BOX_WIDE/10,	0),		/* F */
	SEG(1*BOX_WIDE/10,5*MID_HIGH/12,6*CHR_WIDE/12,5*MID_HIGH/12),
	SEG(1*BOX_WIDE/10,  0,		0*BOX_WIDE/3, 5*MID_HIGH/6),
	SEG(1*BOX_WIDE/3,   MID_HIGH,	  CHR_WIDE,	MID_HIGH),	/* F */
	SEG(1*BOX_WIDE/3, 8*MID_HIGH/6,10*CHR_WIDE/12,8*MID_HIGH/6),
	SEG(1*BOX_WIDE/3,   MID_HIGH,	1*BOX_WIDE/3,	CHR_HIGH),
	-1
    }, glyph_lf[] = {
	SEG(1*BOX_WIDE/10,  0,		1*BOX_WIDE/10,9*MID_HIGH/12),	/* L */
	SEG(1*BOX_WIDE/10,9*MID_HIGH/12,6*BOX_WIDE/10,9*MID_HIGH/12),
	SEG(1*BOX_WIDE/3,   MID_HIGH,	  CHR_WIDE,	MID_HIGH),	/* F */
	SEG(1*BOX_WIDE/3, 8*MID_HIGH/6,10*CHR_WIDE/12,8*MID_HIGH/6),
	SEG(1*BOX_WIDE/3,   MID_HIGH,	1*BOX_WIDE/3,	CHR_HIGH),
	-1
    }, glyph_nl[] = {
	SEG(1*BOX_WIDE/10,5*MID_HIGH/6, 1*BOX_WIDE/10,	0),		/* N */
	SEG(1*BOX_WIDE/10,  0,		5*BOX_WIDE/6, 5*MID_HIGH/6),
	SEG(5*BOX_WIDE/6, 5*MID_HIGH/6, 5*BOX_WIDE/6,	0),
	SEG(1*BOX_WIDE/3,   MID_HIGH,	1*BOX_WIDE/3,	CHR_HIGH),	/* L */
	SEG(1*BOX_WIDE/3,   CHR_HIGH,	  CHR_WIDE,	CHR_HIGH),
	-1
    }, glyph_vt[] = {
	SEG(1*BOX_WIDE/10,   0,		5*BOX_WIDE/12,5*MID_HIGH/6),	/* V */
	SEG(5*BOX_WIDE/12,5*MID_HIGH/6, 5*BOX_WIDE/6,	0),
	SEG(2*BOX_WIDE/10,  MID_HIGH,	  CHR_WIDE,	MID_HIGH),	/* T */
	SEG(6*BOX_WIDE/10,  MID_HIGH,	6*BOX_WIDE/10,	CHR_HIGH),
	-1
    }, plus_or_minus[] =
    {
	SEG(  0,	  5*BOX_HIGH/6,	  CHR_WIDE,   5*BOX_HIGH/6),
	SEG(  MID_WIDE,	  2*BOX_HIGH/6,	  MID_WIDE,   4*BOX_HIGH/6),
	SEG(  0,	  3*BOX_HIGH/6,	  CHR_WIDE,   3*BOX_HIGH/6),
	-1
    }, lower_right_corner[] =
    {
	SEG(  0,	    MID_HIGH,	  MID_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    MID_HIGH,	  MID_WIDE,	0),
	-1
    }, upper_right_corner[] =
    {
	SEG(  0,	    MID_HIGH,	  MID_WIDE,	MID_HIGH),
	SEG( MID_WIDE,	    MID_HIGH,	  MID_WIDE,	BOX_HIGH),
	-1
    }, upper_left_corner[] =
    {
	SEG(  MID_WIDE,	    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    MID_HIGH,	  MID_WIDE,	BOX_HIGH),
	-1
    }, lower_left_corner[] =
    {
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    MID_WIDE,	  BOX_WIDE,	MID_HIGH),
	-1
    }, cross[] =
    {
	SEG(  0,	    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	BOX_HIGH),
	-1
    }, scan_line_1[] =
    {
	SEG(  0,	    0,		  BOX_WIDE,	0),
	-1
    }, scan_line_3[] =
    {
	SEG(  0,	    BOX_HIGH/4,	  BOX_WIDE,	BOX_HIGH/4),
	-1
    }, scan_line_7[] =
    {
	SEG( 0,		    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	-1
    }, scan_line_9[] =
    {
	SEG(  0,	  3*BOX_HIGH/4,	  BOX_WIDE,   3*BOX_HIGH/4),
	-1
    }, horizontal_line[] =
    {
	SEG(  0,	    BOX_HIGH,	  BOX_WIDE,	BOX_HIGH),
	-1
    }, left_tee[] =
    {
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	BOX_HIGH),
	SEG(  MID_WIDE,	    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	-1
    }, right_tee[] =
    {
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	BOX_HIGH),
	SEG(  MID_WIDE,	    MID_HIGH,	  0,		MID_HIGH),
	-1
    }, bottom_tee[] =
    {
	SEG(  0,	    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	MID_HIGH),
	-1
    }, top_tee[] =
    {
	SEG(  0,	    MID_HIGH,	  BOX_WIDE,	MID_HIGH),
	SEG(  MID_WIDE,	    MID_HIGH,	  MID_WIDE,	BOX_HIGH),
	-1
    }, vertical_line[] =
    {
	SEG(  MID_WIDE,	    0,		  MID_WIDE,	BOX_HIGH),
	-1
    }, less_than_or_equal[] =
    {
	SEG(  CHR_WIDE,	    BOX_HIGH/3,	  0,		MID_HIGH),
	SEG(  CHR_WIDE,	  2*BOX_HIGH/3,	  0,		MID_HIGH),
	SEG(  0,	  3*BOX_HIGH/4,	  CHR_WIDE,   3*BOX_HIGH/4),
	-1
    }, greater_than_or_equal[] =
    {
	SEG(  0,	    BOX_HIGH/3,	  CHR_WIDE,	MID_HIGH),
	SEG(  0,	  2*BOX_HIGH/3,	  CHR_WIDE,	MID_HIGH),
	SEG(  0,	  3*BOX_HIGH/4,	  CHR_WIDE,   3*BOX_HIGH/4),
	-1
    }, greek_pi[] =
    {
	SEG(  0,	    MID_HIGH,	  CHR_WIDE,	MID_HIGH),
	SEG(5*CHR_WIDE/6,   MID_HIGH,	5*CHR_WIDE/6,	CHR_HIGH),
	SEG(2*CHR_WIDE/6,   MID_HIGH,	2*CHR_WIDE/6,	CHR_HIGH),
	-1
    }, not_equal_to[] =
    {
	SEG(2*BOX_WIDE/3, 1*BOX_HIGH/3, 1*BOX_WIDE/3,	CHR_HIGH),
	SEG(  0,	  2*BOX_HIGH/3,	  CHR_WIDE,   2*BOX_HIGH/3),
	SEG(  0,	    MID_HIGH,	  CHR_WIDE,	MID_HIGH),
	-1
    };
    /* *INDENT-ON* */

    static const short *lines[] =
    {
	0,			/* 00 (unused) */
	0,			/* 01 diamond */
	0,			/* 02 box */
	glyph_ht,		/* 03 HT */
	glyph_ff,		/* 04 FF */
	0,			/* 05 CR */
	glyph_lf,		/* 06 LF */
	0,			/* 07 degrees (small circle) */
	plus_or_minus,		/* 08 */
	glyph_nl,		/* 09 */
	glyph_vt,		/* 0A */
	lower_right_corner,	/* 0B */
	upper_right_corner,	/* 0C */
	upper_left_corner,	/* 0D */
	lower_left_corner,	/* 0E */
	cross,			/* 0F */
	scan_line_1,		/* 10 */
	scan_line_3,		/* 11 */
	scan_line_7,		/* 12 */
	scan_line_9,		/* 13 */
	horizontal_line,	/* 14 */
	left_tee,		/* 15 */
	right_tee,		/* 16 */
	bottom_tee,		/* 17 */
	top_tee,		/* 18 */
	vertical_line,		/* 19 */
	less_than_or_equal,	/* 1A */
	greater_than_or_equal,	/* 1B */
	greek_pi,		/* 1C */
	not_equal_to,		/* 1D */
	0,			/* 1E LB */
	0,			/* 1F bullet */
    };

    GC gc2;
    CgsEnum cgsId = (ch == 2) ? gcDots : gcLine;
    VTwin *cgsWin = WhichVWin(screen);
    const short *p;
    unsigned font_width = ((flags & DOUBLEWFONT) ? 2 : 1) * screen->fnt_wide;
    unsigned font_height = ((flags & DOUBLEHFONT) ? 2 : 1) * screen->fnt_high;

    if (cells > 1)
	font_width *= cells;

#if OPT_WIDE_CHARS
    /*
     * Try to show line-drawing characters if we happen to be in UTF-8
     * mode, but have gotten an old-style font.
     */
    if (screen->utf8_mode
#if OPT_RENDERFONT
	&& !UsingRenderFont(xw)
#endif
	&& (ch > 127)
	&& (ch != UCS_REPL)) {
	unsigned n;
	for (n = 1; n < 32; n++) {
	    if (dec2ucs(n) == ch
		&& !xtermMissingChar(xw, n,
				     ((flags & BOLD)
				      ? screen->fnts[fBold].fs
				      : screen->fnts[fNorm].fs))) {
		TRACE(("...use xterm-style linedrawing\n"));
		ch = n;
		break;
	    }
	}
    }
#endif

    TRACE(("DRAW_BOX(%d) cell %dx%d at %d,%d%s\n",
	   ch, font_height, font_width, y, x,
	   (ch >= (sizeof(lines) / sizeof(lines[0]))
	    ? "-BAD"
	    : "")));

    if (cgsId == gcDots) {
	setCgsFont(xw, cgsWin, cgsId, getCgsFont(xw, cgsWin, gc));
	setCgsFore(xw, cgsWin, cgsId, getCgsFore(xw, cgsWin, gc));
	setCgsBack(xw, cgsWin, cgsId, getCgsBack(xw, cgsWin, gc));
    } else {
	setCgsFont(xw, cgsWin, cgsId, getCgsFont(xw, cgsWin, gc));
	setCgsFore(xw, cgsWin, cgsId, getCgsBack(xw, cgsWin, gc));
	setCgsBack(xw, cgsWin, cgsId, getCgsBack(xw, cgsWin, gc));
    }
    gc2 = getCgsGC(xw, cgsWin, cgsId);

    if (!(flags & NOBACKGROUND)) {
	XFillRectangle(screen->display, VWindow(screen), gc2, x, y,
		       font_width,
		       font_height);
    }

    setCgsFont(xw, cgsWin, cgsId, getCgsFont(xw, cgsWin, gc));
    setCgsFore(xw, cgsWin, cgsId, getCgsFore(xw, cgsWin, gc));
    setCgsBack(xw, cgsWin, cgsId, getCgsBack(xw, cgsWin, gc));
    gc2 = getCgsGC(xw, cgsWin, cgsId);

    XSetLineAttributes(screen->display, gc2,
		       (flags & BOLD)
		       ? ((font_height > 12)
			  ? font_height / 12
			  : 1)
		       : ((font_height > 16)
			  ? font_height / 16
			  : 1),
		       LineSolid,
		       CapProjecting,
		       JoinMiter);

    if (ch == 1) {		/* diamond */
	XPoint points[5];
	int npoints = 5, n;

	points[0].x = MID_WIDE;
	points[0].y = BOX_HIGH / 4;

	points[1].x = 8 * BOX_WIDE / 8;
	points[1].y = MID_HIGH;

	points[2].x = points[0].x;
	points[2].y = 3 * BOX_HIGH / 4;

	points[3].x = 0 * BOX_WIDE / 8;
	points[3].y = points[1].y;

	points[4].x = points[0].x;
	points[4].y = points[0].y;

	for (n = 0; n < npoints; ++n) {
	    SCALE_X(points[n].x);
	    SCALE_Y(points[n].y);
	    points[n].x += x;
	    points[n].y += y;
	}

	XFillPolygon(screen->display,
		     VWindow(screen), gc2,
		     points, npoints,
		     Convex, CoordModeOrigin);
    } else if (ch == 7) {	/* degrees */
	unsigned width = (BOX_WIDE / 3);
	int x_coord = MID_WIDE - (width / 2);
	int y_coord = MID_HIGH - width;

	SCALE_X(x_coord);
	SCALE_Y(y_coord);
	SCALE_X(width);

	XDrawArc(screen->display,
		 VWindow(screen), gc2,
		 x + x_coord, y + y_coord, width, width,
		 0,
		 360 * 64);
    } else if (ch == 0x1f) {	/* bullet */
	unsigned width = 7 * BOX_WIDE / 10;
	int x_coord = MID_WIDE - (width / 3);
	int y_coord = MID_HIGH - (width / 3);

	SCALE_X(x_coord);
	SCALE_Y(y_coord);
	SCALE_X(width);

	XDrawArc(screen->display,
		 VWindow(screen), gc2,
		 x + x_coord, y + y_coord, width, width,
		 0,
		 360 * 64);
    } else if (ch < (sizeof(lines) / sizeof(lines[0]))
	       && (p = lines[ch]) != 0) {
	int coord[4];
	int n = 0;
	while (*p >= 0) {
	    coord[n++] = *p++;
	    if (n == 4) {
		SCALE_X(coord[0]);
		SCALE_Y(coord[1]);
		SCALE_X(coord[2]);
		SCALE_Y(coord[3]);
		XDrawLine(screen->display,
			  VWindow(screen), gc2,
			  x + coord[0], y + coord[1],
			  x + coord[2], y + coord[3]);
		n = 0;
	    }
	}
    } else if (screen->force_all_chars) {
	/* bounding rectangle, for debugging */
	XDrawRectangle(screen->display, VWindow(screen), gc2, x, y,
		       font_width - 1,
		       font_height - 1);
    }
}

#if OPT_RENDERFONT

/*
 * Check if the given character has a glyph known to Xft.
 *
 * see xc/lib/Xft/xftglyphs.c
 */
Bool
xtermXftMissing(XtermWidget xw, XftFont * font, unsigned wc)
{
    Bool result = False;

    if (font != 0) {
	if (!XftGlyphExists(xw->screen.display, font, wc)) {
#if OPT_WIDE_CHARS
	    TRACE(("xtermXftMissing %d (dec=%#x, ucs=%#x)\n",
		   wc, ucs2dec(wc), dec2ucs(wc)));
#else
	    TRACE(("xtermXftMissing %d\n", wc));
#endif
	    result = True;
	}
    }
    return result;
}
#endif /* OPT_RENDERFONT && OPT_WIDE_CHARS */

#endif /* OPT_BOX_CHARS */

#if OPT_WIDE_CHARS
#define MY_UCS(ucs,dec) case ucs: result = dec; break
unsigned
ucs2dec(unsigned ch)
{
    unsigned result = ch;
    if ((ch > 127)
	&& (ch != UCS_REPL)) {
	switch (ch) {
	    MY_UCS(0x25ae, 0);	/* black vertical rectangle                   */
	    MY_UCS(0x25c6, 1);	/* black diamond                              */
	    MY_UCS(0x2592, 2);	/* medium shade                               */
	    MY_UCS(0x2409, 3);	/* symbol for horizontal tabulation           */
	    MY_UCS(0x240c, 4);	/* symbol for form feed                       */
	    MY_UCS(0x240d, 5);	/* symbol for carriage return                 */
	    MY_UCS(0x240a, 6);	/* symbol for line feed                       */
	    MY_UCS(0x00b0, 7);	/* degree sign                                */
	    MY_UCS(0x00b1, 8);	/* plus-minus sign                            */
	    MY_UCS(0x2424, 9);	/* symbol for newline                         */
	    MY_UCS(0x240b, 10);	/* symbol for vertical tabulation             */
	    MY_UCS(0x2518, 11);	/* box drawings light up and left             */
	    MY_UCS(0x2510, 12);	/* box drawings light down and left           */
	    MY_UCS(0x250c, 13);	/* box drawings light down and right          */
	    MY_UCS(0x2514, 14);	/* box drawings light up and right            */
	    MY_UCS(0x253c, 15);	/* box drawings light vertical and horizontal */
	    MY_UCS(0x23ba, 16);	/* box drawings scan 1                        */
	    MY_UCS(0x23bb, 17);	/* box drawings scan 3                        */
	    MY_UCS(0x2500, 18);	/* box drawings light horizontal              */
	    MY_UCS(0x23bc, 19);	/* box drawings scan 7                        */
	    MY_UCS(0x23bd, 20);	/* box drawings scan 9                        */
	    MY_UCS(0x251c, 21);	/* box drawings light vertical and right      */
	    MY_UCS(0x2524, 22);	/* box drawings light vertical and left       */
	    MY_UCS(0x2534, 23);	/* box drawings light up and horizontal       */
	    MY_UCS(0x252c, 24);	/* box drawings light down and horizontal     */
	    MY_UCS(0x2502, 25);	/* box drawings light vertical                */
	    MY_UCS(0x2264, 26);	/* less-than or equal to                      */
	    MY_UCS(0x2265, 27);	/* greater-than or equal to                   */
	    MY_UCS(0x03c0, 28);	/* greek small letter pi                      */
	    MY_UCS(0x2260, 29);	/* not equal to                               */
	    MY_UCS(0x00a3, 30);	/* pound sign                                 */
	    MY_UCS(0x00b7, 31);	/* middle dot                                 */
	}
    }
    return result;
}

#undef  MY_UCS
#define MY_UCS(ucs,dec) case dec: result = ucs; break

unsigned
dec2ucs(unsigned ch)
{
    unsigned result = ch;
    if (xtermIsDecGraphic(ch)) {
	switch (ch) {
	    MY_UCS(0x25ae, 0);	/* black vertical rectangle                   */
	    MY_UCS(0x25c6, 1);	/* black diamond                              */
	    MY_UCS(0x2592, 2);	/* medium shade                               */
	    MY_UCS(0x2409, 3);	/* symbol for horizontal tabulation           */
	    MY_UCS(0x240c, 4);	/* symbol for form feed                       */
	    MY_UCS(0x240d, 5);	/* symbol for carriage return                 */
	    MY_UCS(0x240a, 6);	/* symbol for line feed                       */
	    MY_UCS(0x00b0, 7);	/* degree sign                                */
	    MY_UCS(0x00b1, 8);	/* plus-minus sign                            */
	    MY_UCS(0x2424, 9);	/* symbol for newline                         */
	    MY_UCS(0x240b, 10);	/* symbol for vertical tabulation             */
	    MY_UCS(0x2518, 11);	/* box drawings light up and left             */
	    MY_UCS(0x2510, 12);	/* box drawings light down and left           */
	    MY_UCS(0x250c, 13);	/* box drawings light down and right          */
	    MY_UCS(0x2514, 14);	/* box drawings light up and right            */
	    MY_UCS(0x253c, 15);	/* box drawings light vertical and horizontal */
	    MY_UCS(0x23ba, 16);	/* box drawings scan 1                        */
	    MY_UCS(0x23bb, 17);	/* box drawings scan 3                        */
	    MY_UCS(0x2500, 18);	/* box drawings light horizontal              */
	    MY_UCS(0x23bc, 19);	/* box drawings scan 7                        */
	    MY_UCS(0x23bd, 20);	/* box drawings scan 9                        */
	    MY_UCS(0x251c, 21);	/* box drawings light vertical and right      */
	    MY_UCS(0x2524, 22);	/* box drawings light vertical and left       */
	    MY_UCS(0x2534, 23);	/* box drawings light up and horizontal       */
	    MY_UCS(0x252c, 24);	/* box drawings light down and horizontal     */
	    MY_UCS(0x2502, 25);	/* box drawings light vertical                */
	    MY_UCS(0x2264, 26);	/* less-than or equal to                      */
	    MY_UCS(0x2265, 27);	/* greater-than or equal to                   */
	    MY_UCS(0x03c0, 28);	/* greek small letter pi                      */
	    MY_UCS(0x2260, 29);	/* not equal to                               */
	    MY_UCS(0x00a3, 30);	/* pound sign                                 */
	    MY_UCS(0x00b7, 31);	/* middle dot                                 */
	}
    }
    return result;
}

#endif /* OPT_WIDE_CHARS */

#if OPT_SHIFT_FONTS
static void
lookupOneFontSize(XtermWidget xw, int fontnum)
{
    TScreen *screen = TScreenOf(xw);

    if (screen->menu_font_sizes[fontnum] == 0) {
	XTermFonts fnt;

	memset(&fnt, 0, sizeof(fnt));
	screen->menu_font_sizes[fontnum] = -1;
	if (xtermOpenFont(xw, screen->MenuFontName(fontnum), &fnt)) {
	    screen->menu_font_sizes[fontnum] = FontSize(fnt.fs);
	    TRACE(("menu_font_sizes[%d] = %ld\n", fontnum,
		   screen->menu_font_sizes[fontnum]));
	    xtermCloseFont(xw, &fnt);
	}
    }
}

/*
 * Cache the font-sizes so subsequent larger/smaller font actions will go fast.
 */
static void
lookupFontSizes(XtermWidget xw)
{
    int n;

    for (n = 0; n < NMENUFONTS; n++) {
	lookupOneFontSize(xw, n);
    }
}

/*
 * Find the index of a larger/smaller font (according to the sign of 'relative'
 * and its magnitude), starting from the 'old' index.
 */
int
lookupRelativeFontSize(XtermWidget xw, int old, int relative)
{
    TScreen *screen = TScreenOf(xw);
    int n, m = -1;

    if (!IsIcon(screen)) {
	lookupFontSizes(xw);
	if (relative != 0) {
	    for (n = 0; n < NMENUFONTS; ++n) {
		if (screen->menu_font_sizes[n] > 0 &&
		    screen->menu_font_sizes[n] != screen->menu_font_sizes[old]) {
		    int cmp_0 = ((screen->menu_font_sizes[n] >
				  screen->menu_font_sizes[old])
				 ? relative
				 : -relative);
		    int cmp_m = ((m < 0)
				 ? 1
				 : ((screen->menu_font_sizes[n] <
				     screen->menu_font_sizes[m])
				    ? relative
				    : -relative));
		    if (cmp_0 > 0 && cmp_m > 0) {
			m = n;
		    }
		}
	    }
	    if (m >= 0) {
		if (relative > 1)
		    m = lookupRelativeFontSize(xw, m, relative - 1);
		else if (relative < -1)
		    m = lookupRelativeFontSize(xw, m, relative + 1);
	    }
	}
    }
    return m;
}

/* ARGSUSED */
void
HandleLargerFont(Widget w GCC_UNUSED,
		 XEvent * event GCC_UNUSED,
		 String * params GCC_UNUSED,
		 Cardinal *param_count GCC_UNUSED)
{
    if (IsXtermWidget(w)) {
	XtermWidget xw = (XtermWidget) w;

	if (xw->misc.shift_fonts) {
	    TScreen *screen = &xw->screen;
	    int m;

	    m = lookupRelativeFontSize(xw, screen->menu_font_number, 1);
	    if (m >= 0) {
		SetVTFont(xw, m, True, NULL);
	    } else {
		Bell(XkbBI_MinorError, 0);
	    }
	}
    }
}

/* ARGSUSED */
void
HandleSmallerFont(Widget w GCC_UNUSED,
		  XEvent * event GCC_UNUSED,
		  String * params GCC_UNUSED,
		  Cardinal *param_count GCC_UNUSED)
{
    if (IsXtermWidget(w)) {
	XtermWidget xw = (XtermWidget) w;

	if (xw->misc.shift_fonts) {
	    TScreen *screen = &xw->screen;
	    int m;

	    m = lookupRelativeFontSize(xw, screen->menu_font_number, -1);
	    if (m >= 0) {
		SetVTFont(xw, m, True, NULL);
	    } else {
		Bell(XkbBI_MinorError, 0);
	    }
	}
    }
}
#endif

int
xtermGetFont(const char *param)
{
    int fontnum;

    switch (param[0]) {
    case 'd':
    case 'D':
    case '0':
	fontnum = fontMenu_default;
	break;
    case '1':
	fontnum = fontMenu_font1;
	break;
    case '2':
	fontnum = fontMenu_font2;
	break;
    case '3':
	fontnum = fontMenu_font3;
	break;
    case '4':
	fontnum = fontMenu_font4;
	break;
    case '5':
	fontnum = fontMenu_font5;
	break;
    case '6':
	fontnum = fontMenu_font6;
	break;
    case 'e':
    case 'E':
	fontnum = fontMenu_fontescape;
	break;
    case 's':
    case 'S':
	fontnum = fontMenu_fontsel;
	break;
    default:
	fontnum = -1;
	break;
    }
    return fontnum;
}

/* ARGSUSED */
void
HandleSetFont(Widget w GCC_UNUSED,
	      XEvent * event GCC_UNUSED,
	      String * params,
	      Cardinal *param_count)
{
    if (IsXtermWidget(w)) {
	int fontnum;
	VTFontNames fonts;

	memset(&fonts, 0, sizeof(fonts));

	if (*param_count == 0) {
	    fontnum = fontMenu_default;
	} else {
	    Cardinal maxparams = 1;	/* total number of params allowed */
	    int result = xtermGetFont(params[0]);

	    switch (result) {
	    case fontMenu_default:	/* FALLTHRU */
	    case fontMenu_font1:	/* FALLTHRU */
	    case fontMenu_font2:	/* FALLTHRU */
	    case fontMenu_font3:	/* FALLTHRU */
	    case fontMenu_font4:	/* FALLTHRU */
	    case fontMenu_font5:	/* FALLTHRU */
	    case fontMenu_font6:	/* FALLTHRU */
		break;
	    case fontMenu_fontescape:
#if OPT_WIDE_CHARS
		maxparams = 5;
#else
		maxparams = 3;
#endif
		break;
	    case fontMenu_fontsel:
		maxparams = 2;
		break;
	    default:
		Bell(XkbBI_MinorError, 0);
		return;
	    }
	    fontnum = result;

	    if (*param_count > maxparams) {	/* see if extra args given */
		Bell(XkbBI_MinorError, 0);
		return;
	    }
	    switch (*param_count) {	/* assign 'em */
#if OPT_WIDE_CHARS
	    case 5:
		fonts.f_wb = params[4];
		/* FALLTHRU */
	    case 4:
		fonts.f_w = params[3];
		/* FALLTHRU */
#endif
	    case 3:
		fonts.f_b = params[2];
		/* FALLTHRU */
	    case 2:
		fonts.f_n = params[1];
		break;
	    }
	}

	SetVTFont((XtermWidget) w, fontnum, True, &fonts);
    }
}

void
SetVTFont(XtermWidget xw,
	  int which,
	  Bool doresize,
	  const VTFontNames * fonts)
{
    TScreen *screen = &xw->screen;

    TRACE(("SetVTFont(which=%d, f_n=%s, f_b=%s)\n", which,
	   (fonts && fonts->f_n) ? fonts->f_n : "<null>",
	   (fonts && fonts->f_b) ? fonts->f_b : "<null>"));

    if (IsIcon(screen)) {
	Bell(XkbBI_MinorError, 0);
    } else if (which >= 0 && which < NMENUFONTS) {
	VTFontNames myfonts;

	memset(&myfonts, 0, sizeof(myfonts));
	if (fonts != 0)
	    myfonts = *fonts;

	if (which == fontMenu_fontsel) {	/* go get the selection */
	    FindFontSelection(xw, myfonts.f_n, False);
	    return;
	} else {
	    int oldFont = screen->menu_font_number;

#define USE_CACHED(field, name) \
	    if (myfonts.field == 0) { \
		myfonts.field = screen->menu_font_names[which][name]; \
		TRACE(("set myfonts." #field " from menu_font_names[%d][" #name "] %s\n", \
		       which, NonNull(myfonts.field))); \
	    } else { \
		TRACE(("set myfonts." #field " reused\n")); \
	    }
	    USE_CACHED(f_n, fNorm);
	    USE_CACHED(f_b, fBold);
#if OPT_WIDE_CHARS
	    USE_CACHED(f_w, fWide);
	    USE_CACHED(f_wb, fWBold);
#endif
	    if (xtermLoadFont(xw,
			      &myfonts,
			      doresize, which)) {
		return;
	    } else {
		xtermLoadFont(xw,
			      xtermFontName(screen->MenuFontName(oldFont)),
			      doresize, oldFont);
	    }
	}
    }

    Bell(XkbBI_MinorError, 0);
    return;
}