81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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#include "libgraph.h"
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#include <alloc.h>
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XFontStruct * grfont = NULL;
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static void gr_font(char *fontname)
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{
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XFontStruct * font = XLoadQueryFont(grdisplay, fontname);
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if (font == NULL) gr_fail("cannot find font %s", fontname);
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if (grfont != NULL) XFreeFont(grdisplay, grfont);
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grfont = font;
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XSetFont(grdisplay, grwindow.gc, grfont->fid);
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XSetFont(grdisplay, grbstore.gc, grfont->fid);
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}
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value gr_set_font(value fontname)
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{
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gr_check_open();
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gr_font(String_val(fontname));
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return Val_unit;
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}
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value gr_set_text_size (value sz)
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{
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return Val_unit;
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}
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static void gr_draw_text(char *txt, int len)
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{
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if (grfont == NULL) gr_font(DEFAULT_FONT);
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XDrawString(grdisplay, grwindow.win, grwindow.gc,
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grx, Wcvt(gry) - grfont->descent + 1, txt, len);
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XDrawString(grdisplay, grbstore.win, grbstore.gc,
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grx, Bcvt(gry) - grfont->descent + 1, txt, len);
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grx += XTextWidth(grfont, txt, len);
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XFlush(grdisplay);
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}
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value gr_draw_char(value chr)
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{
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char str[1];
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gr_check_open();
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str[0] = Int_val(chr);
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gr_draw_text(str, 1);
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return Val_unit;
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}
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value gr_draw_string(value str)
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{
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gr_check_open();
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gr_draw_text(String_val(str), string_length(str));
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return Val_unit;
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}
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value gr_text_size(value str)
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{
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int width;
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value res;
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gr_check_open();
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if (grfont == NULL) gr_font(DEFAULT_FONT);
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width = XTextWidth(grfont, String_val(str), string_length(str));
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res = alloc_small(2, 0);
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Field(res, 0) = Val_int(width);
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Field(res, 1) = Val_int(grfont->ascent + grfont->descent);
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return res;
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}
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