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Diffstat (limited to 'libX11/src/TextExt16.c')
| -rw-r--r-- | libX11/src/TextExt16.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/libX11/src/TextExt16.c b/libX11/src/TextExt16.c new file mode 100644 index 000000000..763350a10 --- /dev/null +++ b/libX11/src/TextExt16.c @@ -0,0 +1,212 @@ +/* $Xorg: TextExt16.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/TextExt16.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 + +/* + * XTextExtents16 - compute the extents of string given as a sequence of + * XChar2bs. + */ +int +XTextExtents16 ( + XFontStruct *fs, + _Xconst XChar2b *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 */ + + if (singlerow) { + 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; i < nchars; i++, string++) { + register XCharStruct *cs; + unsigned int r = (unsigned int) string->byte1; /* watch for macros */ + unsigned int c = (unsigned int) string->byte2; /* watch for macros */ + + if (singlerow) { + unsigned int ind = ((r << 8) | c); /* watch for macros */ + CI_GET_CHAR_INFO_1D (fs, ind, def, cs); + } else { + CI_GET_CHAR_INFO_2D (fs, r, c, 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; +} + + +/* + * XTextWidth16 - compute the width of sequence of XChar2bs. This is a + * subset of XTextExtents16. + */ +int +XTextWidth16 ( + XFontStruct *fs, + _Xconst XChar2b *string, + int count) +{ + int i; /* iterator */ + Bool singlerow = (fs->max_byte1 == 0); /* optimization */ + XCharStruct *def; /* info about default char */ + int width = 0; /* RETURN value */ + + if (singlerow) { + 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; i < count; i++, string++) { + register XCharStruct *cs; + unsigned int r = (unsigned int) string->byte1; /* watch for macros */ + unsigned int c = (unsigned int) string->byte2; /* watch for macros */ + + if (singlerow) { + unsigned int ind = ((r << 8) | c); /* watch for macros */ + CI_GET_CHAR_INFO_1D (fs, ind, def, cs); + } else { + CI_GET_CHAR_INFO_2D (fs, r, c, def, cs); + } + + if (cs) width += cs->width; + } + + return width; +} + + +/* + * _XTextHeight16 - compute the height of sequence of XChar2bs. + */ +int +_XTextHeight16 ( + XFontStruct *fs, + _Xconst XChar2b *string, + int count) +{ + int i; /* iterator */ + Bool singlerow = (fs->max_byte1 == 0); /* optimization */ + XCharStruct *def; /* info about default char */ + int height = 0; /* RETURN value */ + + if (singlerow) { + 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; i < count; i++, string++) { + register XCharStruct *cs; + unsigned int r = (unsigned int) string->byte1; /* watch for macros */ + unsigned int c = (unsigned int) string->byte2; /* watch for macros */ + + if (singlerow) { + unsigned int ind = ((r << 8) | c); /* watch for macros */ + CI_GET_CHAR_INFO_1D (fs, ind, def, cs); + } else { + CI_GET_CHAR_INFO_2D (fs, r, c, def, cs); + } + + if (cs) height += (cs->ascent + cs->descent); + } + + return height; +} + |