84 lines
3.1 KiB
C
84 lines
3.1 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 <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <mlvalues.h>
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struct canvas {
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int w, h; /* Dimensions of the drawable */
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Drawable win; /* The drawable itself */
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GC gc; /* The associated graphics context */
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};
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extern Display * grdisplay; /* The display connection */
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extern int grscreen; /* The screen number */
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extern Colormap grcolormap; /* The color map */
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extern struct canvas grwindow; /* The graphics window */
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extern struct canvas grbstore; /* The pixmap used for backing store */
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extern int grwhite, grblack; /* Black and white pixels for X */
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extern int grbackground; /* Background color for X
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(used for CAML color -1) */
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extern Bool grdisplay_mode; /* Display-mode flag */
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extern Bool grremember_mode; /* Remember-mode flag */
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extern int grx, gry; /* Coordinates of the current point */
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extern int grcolor; /* Current *CAML* drawing color (can be -1) */
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extern XFontStruct * grfont; /* Current font */
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extern long grselected_events; /* Events we are interested in */
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extern Bool direct_rgb;
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extern int byte_order;
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extern int bitmap_unit;
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extern int bits_per_pixel;
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#define Wcvt(y) (grwindow.h - 1 - (y))
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#define Bcvt(y) (grbstore.h - 1 - (y))
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#define WtoB(y) ((y) + grbstore.h - grwindow.h)
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#define BtoW(y) ((y) + grwindow.h - grbstore.h)
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#define max(a,b) ((a) > (b) ? (a) : (b))
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#define DEFAULT_SCREEN_WIDTH 600
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#define DEFAULT_SCREEN_HEIGHT 450
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#define BORDER_WIDTH 2
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#define WINDOW_NAME "Caml graphics"
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#define ICON_NAME "Caml graphics"
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#define DEFAULT_SELECTED_EVENTS \
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(ExposureMask | KeyPressMask | StructureNotifyMask)
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#define DEFAULT_FONT "fixed"
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#define SIZE_QUEUE 256
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/* To handle events asynchronously */
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#ifdef HAS_ASYNC_IO
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#define USE_ASYNC_IO
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#define EVENT_SIGNAL SIGIO
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#else
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#ifdef HAS_SETITIMER
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#define USE_INTERVAL_TIMER
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#define EVENT_SIGNAL SIGALRM
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#else
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#define USE_ALARM
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#define EVENT_SIGNAL SIGALRM
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#endif
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#endif
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extern void gr_fail(char *fmt, char *arg);
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extern void gr_check_open(void);
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extern unsigned long gr_pixel_rgb(int rgb);
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extern int gr_rgb_pixel(long unsigned int pixel);
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extern void gr_handle_event(XEvent *e);
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extern void gr_init_color_cache(void);
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extern value id_of_window( Window w );
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