72 lines
2.6 KiB
C
72 lines
2.6 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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/* Automatique. Distributed only by permission. */
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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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int grscreen; /* The screen number */
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Colormap grcolormap; /* The color map */
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struct canvas grwindow; /* The graphics window */
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struct canvas grbstore; /* The pixmap used for backing store */
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int grwhite, grblack; /* Black and white pixels */
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int grx, gry; /* Coordinates of the current point */
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unsigned long grcolor; /* Current drawing color */
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extern XFontStruct * grfont; /* Current font */
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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 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 Light graphics"
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#define ICON_NAME "Caml Light graphics"
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#define DEFAULT_EVENT_MASK \
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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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void gr_fail(char *fmt, char *arg);
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void gr_check_open(void);
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unsigned long gr_pixel_rgb(int rgb);
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int gr_rgb_pixel(long unsigned int pixel);
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void gr_handle_simple_event(XEvent *e);
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void gr_enqueue_char(unsigned char c);
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void gr_init_color_cache(void);
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