68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include "libgraph.h"
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XFontStruct * grfont = NULL;
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static void gr_font(fontname)
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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(fontname)
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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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static void gr_draw_text(txt, len)
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char * txt;
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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(chr)
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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(str)
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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(str)
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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_tuple(2);
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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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