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+/* $Xorg: TextExt.c,v 1.4 2001/02/09 02:03:37 xorgcvs Exp $ */
+/*
+
+Copyright 1989, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+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 OPEN GROUP 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 of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+/* $XFree86: xc/lib/X11/TextExt.c,v 1.4 2001/12/14 19:54:07 dawes Exp $ */
+/*
+ * Copyright 1995 by FUJITSU LIMITED
+ * This is source code modified by FUJITSU LIMITED under the Joint
+ * Development Agreement for the CDE/Motif PST.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+
+#define min_byte2 min_char_or_byte2
+#define max_byte2 max_char_or_byte2
+
+
+/*
+ * CI_GET_ROWZERO_CHAR_INFO_2D - do the same thing as CI_GET_CHAR_INFO_1D,
+ * except that the font has more than one row. This is special case of more
+ * general version used in XTextExt16.c since row == 0. This is used when
+ * max_byte2 is not zero. A further optimization would do the check for
+ * min_byte1 being zero ahead of time.
+ */
+
+#define CI_GET_ROWZERO_CHAR_INFO_2D(fs,col,def,cs) \
+{ \
+ cs = def; \
+ if (fs->min_byte1 == 0 && \
+ col >= fs->min_byte2 && col <= fs->max_byte2) { \
+ if (fs->per_char == NULL) { \
+ cs = &fs->min_bounds; \
+ } else { \
+ cs = &fs->per_char[(col - fs->min_byte2)]; \
+ if (CI_NONEXISTCHAR(cs)) cs = def; \
+ } \
+ } \
+}
+
+
+/*
+ * XTextExtents - compute the extents of string given as a sequences of eight
+ * bit bytes. Since we know that the input characters will always be from the
+ * first row of the font (i.e. byte1 == 0), we can do some optimizations beyond
+ * what is done in XTextExtents16.
+ */
+int
+XTextExtents (
+ XFontStruct *fs,
+ _Xconst char *string,
+ int nchars,
+ int *dir, /* RETURN font information */
+ int *font_ascent, /* RETURN font information */
+ int *font_descent, /* RETURN font information */
+ register XCharStruct *overall) /* RETURN character information */
+{
+ int i; /* iterator */
+ Bool singlerow = (fs->max_byte1 == 0); /* optimization */
+ int nfound = 0; /* number of characters found */
+ XCharStruct *def; /* info about default char */
+ unsigned char *us; /* be 8bit clean */
+
+ if (singlerow) { /* optimization */
+ CI_GET_DEFAULT_INFO_1D (fs, def);
+ } else {
+ CI_GET_DEFAULT_INFO_2D (fs, def);
+ }
+
+ *dir = fs->direction;
+ *font_ascent = fs->ascent;
+ *font_descent = fs->descent;
+
+ /*
+ * Iterate over the input string getting the appropriate * char struct.
+ * The default (which may be null if there is no def_char) will be returned
+ * if the character doesn't exist. On the first time * through the loop,
+ * assign the values to overall; otherwise, compute * the new values.
+ */
+
+ for (i = 0, us = (unsigned char *) string; i < nchars; i++, us++) {
+ register unsigned uc = (unsigned) *us; /* since about to do macro */
+ register XCharStruct *cs;
+
+ if (singlerow) { /* optimization */
+ CI_GET_CHAR_INFO_1D (fs, uc, def, cs);
+ } else {
+ CI_GET_ROWZERO_CHAR_INFO_2D (fs, uc, def, cs);
+ }
+
+ if (cs) {
+ if (nfound++ == 0) {
+ *overall = *cs;
+ } else {
+ overall->ascent = max (overall->ascent, cs->ascent);
+ overall->descent = max (overall->descent, cs->descent);
+ overall->lbearing = min (overall->lbearing,
+ overall->width + cs->lbearing);
+ overall->rbearing = max (overall->rbearing,
+ overall->width + cs->rbearing);
+ overall->width += cs->width;
+ }
+ }
+ }
+
+ /*
+ * if there were no characters, then set everything to 0
+ */
+ if (nfound == 0) {
+ overall->width = overall->ascent = overall->descent =
+ overall->lbearing = overall->rbearing = 0;
+ }
+
+ return 0;
+}
+
+
+/*
+ * XTextWidth - compute the width of a string of eightbit bytes. This is a
+ * subset of XTextExtents.
+ */
+int
+XTextWidth (
+ XFontStruct *fs,
+ _Xconst char *string,
+ int count)
+{
+ int i; /* iterator */
+ Bool singlerow = (fs->max_byte1 == 0); /* optimization */
+ XCharStruct *def; /* info about default char */
+ unsigned char *us; /* be 8bit clean */
+ int width = 0; /* RETURN value */
+
+ if (singlerow) { /* optimization */
+ CI_GET_DEFAULT_INFO_1D (fs, def);
+ } else {
+ CI_GET_DEFAULT_INFO_2D (fs, def);
+ }
+
+ if (def && fs->min_bounds.width == fs->max_bounds.width)
+ return (fs->min_bounds.width * count);
+
+ /*
+ * Iterate over all character in the input string; only consider characters
+ * that exist.
+ */
+ for (i = 0, us = (unsigned char *) string; i < count; i++, us++) {
+ register unsigned uc = (unsigned) *us; /* since about to do macro */
+ register XCharStruct *cs;
+
+ if (singlerow) { /* optimization */
+ CI_GET_CHAR_INFO_1D (fs, uc, def, cs);
+ } else {
+ CI_GET_ROWZERO_CHAR_INFO_2D (fs, uc, def, cs);
+ }
+
+ if (cs) width += cs->width;
+ }
+
+ return width;
+}
+
+
+
+/*
+ * _XTextHeight - compute the height of a string of eightbit bytes.
+ */
+int
+_XTextHeight (
+ XFontStruct *fs,
+ _Xconst char *string,
+ int count)
+{
+ int i; /* iterator */
+ Bool singlerow = (fs->max_byte1 == 0); /* optimization */
+ XCharStruct *def; /* info about default char */
+ unsigned char *us; /* be 8bit clean */
+ int height = 0; /* RETURN value */
+
+ if (singlerow) { /* optimization */
+ CI_GET_DEFAULT_INFO_1D (fs, def);
+ } else {
+ CI_GET_DEFAULT_INFO_2D (fs, def);
+ }
+
+ if (def && (fs->min_bounds.ascent == fs->max_bounds.ascent)
+ && (fs->min_bounds.descent == fs->max_bounds.descent))
+ return ((fs->min_bounds.ascent + fs->min_bounds.descent) * count);
+
+ /*
+ * Iterate over all character in the input string; only consider characters
+ * that exist.
+ */
+ for (i = 0, us = (unsigned char *) string; i < count; i++, us++) {
+ register unsigned uc = (unsigned) *us; /* since about to do macro */
+ register XCharStruct *cs;
+
+ if (singlerow) { /* optimization */
+ CI_GET_CHAR_INFO_1D (fs, uc, def, cs);
+ } else {
+ CI_GET_ROWZERO_CHAR_INFO_2D (fs, uc, def, cs);
+ }
+
+ if (cs) height += (cs->ascent + cs->descent);
+ }
+
+ return height;
+}
+
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