Initial revision
This commit is contained in:
Elliot Lee
379
gdk/gdkfont.c
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379
gdk/gdkfont.c
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/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <X11/Xlib.h>
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#include <X11/Xos.h>
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#include "gdk.h"
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#include "gdkprivate.h"
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GdkFont*
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gdk_font_load (const gchar *font_name)
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{
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GdkFont *font;
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GdkFontPrivate *private;
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private = g_new (GdkFontPrivate, 1);
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font = (GdkFont*) private;
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private->xdisplay = gdk_display;
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private->xfont = XLoadQueryFont (private->xdisplay, font_name);
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private->ref_count = 1;
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if (!private->xfont)
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{
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g_free (font);
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return NULL;
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}
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else
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{
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font->type = GDK_FONT_FONT;
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font->ascent = ((XFontStruct *) private->xfont)->ascent;
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font->descent = ((XFontStruct *) private->xfont)->descent;
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}
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gdk_xid_table_insert (&((XFontStruct *) private->xfont)->fid, font);
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return font;
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}
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GdkFont*
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gdk_fontset_load(gchar *fontset_name)
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{
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GdkFont *font;
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GdkFontPrivate *private;
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XFontSet fontset;
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gint missing_charset_count;
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gchar **missing_charset_list;
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gchar *def_string;
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private = g_new (GdkFontPrivate, 1);
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font = (GdkFont*) private;
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private->xdisplay = gdk_display;
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fontset = XCreateFontSet (gdk_display, fontset_name,
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&missing_charset_list, &missing_charset_count,
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&def_string);
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if (missing_charset_count)
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{
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g_print ("Missing charsets in FontSet creation");
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XFreeStringList (missing_charset_list);
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}
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private->ref_count = 1;
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if (!fontset)
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{
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g_free (font);
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return NULL;
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}
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else
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{
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XFontSetExtents *extent = XExtentsOfFontSet(fontset);
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private->xfont = fontset;
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font->type = GDK_FONT_FONTSET;
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/* how to define ascent and descent for fontset ??? */
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font->ascent = extent->max_logical_extent.height;
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font->descent = font->ascent / 4 ;
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}
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return font;
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}
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void
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gdk_font_free (GdkFont *font)
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{
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GdkFontPrivate *private;
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g_return_if_fail (font != NULL);
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private = (GdkFontPrivate*) font;
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private->ref_count -= 1;
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if (private->ref_count == 0)
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{
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gdk_xid_table_remove (((XFontStruct *) private->xfont)->fid);
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XFreeFont (private->xdisplay, (XFontStruct *) private->xfont);
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g_free (font);
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}
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}
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void
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gdk_fontset_free (GdkFont *font)
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{
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GdkFontPrivate *private;
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g_return_if_fail (font != NULL);
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private = (GdkFontPrivate*) font;
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private->ref_count -= 1;
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if (private->ref_count == 0)
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{
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XFreeFontSet (private->xdisplay, (XFontSet) private->xfont);
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g_free (font);
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}
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}
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GdkFont*
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gdk_font_ref (GdkFont *font)
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{
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GdkFontPrivate *private;
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g_return_val_if_fail (font != NULL, NULL);
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private = (GdkFontPrivate*) font;
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private->ref_count += 1;
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return font;
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}
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gint
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gdk_font_id (GdkFont *font)
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{
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GdkFontPrivate *font_private;
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g_return_val_if_fail (font != NULL, 0);
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font_private = (GdkFontPrivate*) font;
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if (font->type == GDK_FONT_FONT)
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{
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return ((XFontStruct *) font_private->xfont)->fid;
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}
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else
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{
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return 0;
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}
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}
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gint
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gdk_font_equal (GdkFont *fonta,
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GdkFont *fontb)
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{
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GdkFontPrivate *privatea;
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GdkFontPrivate *privateb;
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g_return_val_if_fail (fonta != NULL, FALSE);
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g_return_val_if_fail (fontb != NULL, FALSE);
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privatea = (GdkFontPrivate*) fonta;
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privateb = (GdkFontPrivate*) fontb;
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if (fonta->type == GDK_FONT_FONT && fontb->type == GDK_FONT_FONT)
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{
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return (((XFontStruct *) privatea->xfont)->fid ==
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((XFontStruct *) privateb->xfont)->fid);
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}
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else if (fonta->type == GDK_FONT_FONTSET && fontb->type == GDK_FONT_FONTSET)
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{
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/* how to compare two fontsets ?? by basename or XFontSet ?? */
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return (((XFontSet) privatea->xfont) == ((XFontSet) privateb->xfont));
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}
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else
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/* fontset != font */
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return 0;
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}
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gint
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gdk_string_width (GdkFont *font,
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const gchar *string)
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{
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GdkFontPrivate *font_private;
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gint width;
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XFontStruct *xfont;
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XFontSet fontset;
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g_return_val_if_fail (font != NULL, -1);
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g_return_val_if_fail (string != NULL, -1);
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font_private = (GdkFontPrivate*) font;
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switch (font->type)
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{
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case GDK_FONT_FONT:
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xfont = (XFontStruct *) font_private->xfont;
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if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
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{
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width = XTextWidth (xfont, string, strlen (string));
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}
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else
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{
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width = XTextWidth16 (xfont, (XChar2b *) string, strlen (string) / 2);
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}
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break;
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case GDK_FONT_FONTSET:
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fontset = (XFontSet) font_private->xfont;
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width = XmbTextEscapement (fontset, string, strlen(string));
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break;
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default:
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width = 0;
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}
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return width;
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}
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gint
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gdk_text_width (GdkFont *font,
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const gchar *text,
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gint text_length)
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{
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GdkFontPrivate *private;
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gint width;
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XFontStruct *xfont;
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XFontSet fontset;
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g_return_val_if_fail (font != NULL, -1);
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g_return_val_if_fail (text != NULL, -1);
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private = (GdkFontPrivate*) font;
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switch (font->type)
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{
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case GDK_FONT_FONT:
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xfont = (XFontStruct *) private->xfont;
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if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
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{
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width = XTextWidth (xfont, text, text_length);
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}
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else
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{
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width = XTextWidth16 (xfont, (XChar2b *) text, text_length / 2);
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}
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break;
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case GDK_FONT_FONTSET:
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fontset = (XFontSet) private->xfont;
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width = XmbTextEscapement (fontset, text, text_length);
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break;
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default:
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width = 0;
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}
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return width;
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}
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/* Problem: What if a character is a 16 bits character ?? */
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gint
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gdk_char_width (GdkFont *font,
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gchar character)
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{
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GdkFontPrivate *private;
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XCharStruct *chars;
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gint width;
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guint ch = character & 0xff; /* get rid of sign-extension */
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XFontStruct *xfont;
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XFontSet fontset;
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g_return_val_if_fail (font != NULL, -1);
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private = (GdkFontPrivate*) font;
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switch (font->type)
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{
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case GDK_FONT_FONT:
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/* only 8 bits characters are considered here */
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xfont = (XFontStruct *) private->xfont;
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if ((xfont->min_byte1 == 0) &&
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(xfont->max_byte1 == 0) &&
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(ch >= xfont->min_char_or_byte2) &&
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(ch <= xfont->max_char_or_byte2))
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{
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chars = xfont->per_char;
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if (chars)
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width = chars[ch - xfont->min_char_or_byte2].width;
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else
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width = xfont->min_bounds.width;
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}
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else
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{
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width = XTextWidth (xfont, &character, 1);
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}
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break;
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case GDK_FONT_FONTSET:
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fontset = (XFontSet) private->xfont;
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width = XmbTextEscapement (fontset, &character, 1) ;
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break;
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default:
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width = 0;
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}
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return width;
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}
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gint
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gdk_string_measure (GdkFont *font,
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const gchar *string)
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{
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g_return_val_if_fail (font != NULL, -1);
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g_return_val_if_fail (string != NULL, -1);
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return gdk_text_measure (font, string, strlen (string));
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}
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gint
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gdk_text_measure (GdkFont *font,
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const gchar *text,
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gint text_length)
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{
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GdkFontPrivate *private;
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XCharStruct overall;
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XFontStruct *xfont;
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XFontSet fontset;
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XRectangle ink, log;
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int direction;
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int font_ascent;
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int font_descent;
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gint width;
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g_return_val_if_fail (font != NULL, -1);
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g_return_val_if_fail (text != NULL, -1);
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private = (GdkFontPrivate*) font;
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switch (font->type)
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{
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case GDK_FONT_FONT:
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xfont = (XFontStruct *) private->xfont;
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if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
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{
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XTextExtents (xfont, text, text_length,
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&direction, &font_ascent, &font_descent,
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&overall);
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}
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else
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{
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XTextExtents16 (xfont, (XChar2b *) text, text_length / 2,
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&direction, &font_ascent, &font_descent,
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&overall);
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}
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width = overall.rbearing;
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break;
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case GDK_FONT_FONTSET:
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fontset = (XFontSet) private->xfont;
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XmbTextExtents (fontset, text, text_length, &ink, &log);
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width = log.width;
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break;
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default:
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width = 0;
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}
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return width;
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}
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gint
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gdk_char_measure (GdkFont *font,
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gchar character)
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{
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g_return_val_if_fail (font != NULL, -1);
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return gdk_text_measure (font, &character, 1);
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}
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