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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <mlvalues.h>
struct canvas {
int w, h; /* Dimensions of the drawable */
Drawable win; /* The drawable itself */
GC gc; /* The associated graphics context */
};
extern Display * grdisplay; /* The display connection */
int grscreen; /* The screen number */
Colormap grcolormap; /* The color map */
struct canvas grwindow; /* The graphics window */
struct canvas grbstore; /* The pixmap used for backing store */
int grwhite, grblack; /* Black and white pixels */
int grx, gry; /* Coordinates of the current point */
unsigned long grcolor; /* Current drawing color */
extern XFontStruct * grfont; /* Current font */
#define Wcvt(y) (grwindow.h - 1 - (y))
#define Bcvt(y) (grbstore.h - 1 - (y))
#define WtoB(y) ((y) + grbstore.h - grwindow.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 WINDOW_NAME "Caml Light graphics"
#define ICON_NAME "Caml Light graphics"
#define DEFAULT_EVENT_MASK \
(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
void gr_fail();
void gr_check_open();
unsigned long gr_pixel_rgb();
int gr_rgb_pixel();
void gr_handle_simple_event();
void gr_enqueue_char();
void gr_init_color_cache();
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