85 lines
2.8 KiB
C
85 lines
2.8 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, with */
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/* the special exception on linking described in file ../../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 * caml_gr_font = NULL;
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static void caml_gr_get_font(char *fontname)
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{
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XFontStruct * font = XLoadQueryFont(caml_gr_display, fontname);
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if (font == NULL) caml_gr_fail("cannot find font %s", fontname);
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if (caml_gr_font != NULL) XFreeFont(caml_gr_display, caml_gr_font);
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caml_gr_font = font;
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XSetFont(caml_gr_display, caml_gr_window.gc, caml_gr_font->fid);
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XSetFont(caml_gr_display, caml_gr_bstore.gc, caml_gr_font->fid);
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}
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value caml_gr_set_font(value fontname)
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{
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caml_gr_check_open();
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caml_gr_get_font(String_val(fontname));
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return Val_unit;
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}
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value caml_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 caml_gr_draw_text(char *txt, int len)
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{
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if (caml_gr_font == NULL) caml_gr_get_font(DEFAULT_FONT);
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if (caml_gr_remember_modeflag)
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XDrawString(caml_gr_display, caml_gr_bstore.win, caml_gr_bstore.gc,
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caml_gr_x, Bcvt(caml_gr_y) - caml_gr_font->descent + 1, txt, len);
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if (caml_gr_display_modeflag) {
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XDrawString(caml_gr_display, caml_gr_window.win, caml_gr_window.gc,
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caml_gr_x, Wcvt(caml_gr_y) - caml_gr_font->descent + 1, txt, len);
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XFlush(caml_gr_display);
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}
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caml_gr_x += XTextWidth(caml_gr_font, txt, len);
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}
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value caml_gr_draw_char(value chr)
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{
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char str[1];
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caml_gr_check_open();
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str[0] = Int_val(chr);
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caml_gr_draw_text(str, 1);
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return Val_unit;
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}
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value caml_gr_draw_string(value str)
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{
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caml_gr_check_open();
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caml_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 caml_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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caml_gr_check_open();
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if (caml_gr_font == NULL) caml_gr_get_font(DEFAULT_FONT);
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width = XTextWidth(caml_gr_font, 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(caml_gr_font->ascent + caml_gr_font->descent);
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return res;
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}
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