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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <mlvalues.h>
#include <misc.h>
struct canvas {
int w, h; /* Dimensions of the drawable */
Drawable win; /* The drawable itself */
GC gc; /* The associated graphics context */
};
extern Display * caml_gr_display; /* The display connection */
extern int caml_gr_screen; /* The screen number */
extern Colormap caml_gr_colormap; /* The color map */
extern struct canvas caml_gr_window; /* The graphics window */
extern struct canvas caml_gr_bstore; /* The pixmap used for backing store */
extern int caml_gr_white, caml_gr_black; /* Black and white pixels for X */
extern int caml_gr_background; /* Background color for X
(used for CAML color -1) */
extern Bool caml_gr_display_modeflag; /* Display-mode flag */
extern Bool caml_gr_remember_modeflag; /* Remember-mode flag */
extern int caml_gr_x, caml_gr_y; /* Coordinates of the current point */
extern int caml_gr_color; /* Current *CAML* drawing color (can be -1) */
extern XFontStruct * caml_gr_font; /* Current font */
extern long caml_gr_selected_events; /* Events we are interested in */
extern Bool caml_gr_ignore_sigio; /* Whether to consume events on sigio */
extern Bool caml_gr_direct_rgb;
extern int caml_gr_byte_order;
extern int caml_gr_bitmap_unit;
extern int caml_gr_bits_per_pixel;
#define Wcvt(y) (caml_gr_window.h - 1 - (y))
#define Bcvt(y) (caml_gr_bstore.h - 1 - (y))
#define WtoB(y) ((y) + caml_gr_bstore.h - caml_gr_window.h)
#define BtoW(y) ((y) + caml_gr_window.h - caml_gr_bstore.h)
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))
#define DEFAULT_SCREEN_WIDTH 600
#define DEFAULT_SCREEN_HEIGHT 450
#define BORDER_WIDTH 2
#define DEFAULT_WINDOW_NAME "OCaml graphics"
#define DEFAULT_SELECTED_EVENTS \
(ExposureMask | KeyPressMask | StructureNotifyMask)
#define DEFAULT_FONT "fixed"
#define SIZE_QUEUE 256
/* To handle events asynchronously */
#ifdef HAS_ASYNC_IO
#define USE_ASYNC_IO
#define EVENT_SIGNAL SIGIO
#else
#ifdef HAS_SETITIMER
#define USE_INTERVAL_TIMER
#define EVENT_SIGNAL SIGALRM
#else
#define USE_ALARM
#define EVENT_SIGNAL SIGALRM
#endif
#endif
extern void caml_gr_fail(char *fmt, char *arg) Noreturn;
extern void caml_gr_check_open(void);
extern unsigned long caml_gr_pixel_rgb(int rgb);
extern int caml_gr_rgb_pixel(long unsigned int pixel);
extern void caml_gr_handle_event(XEvent *e);
extern void caml_gr_init_color_cache(void);
extern void caml_gr_init_direct_rgb_to_pixel(void);
extern value caml_gr_id_of_window( Window w );
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