86 lines
3.5 KiB
C
86 lines
3.5 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, with */
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/* the special exception on linking described in file ../../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 * caml_gr_display; /* The display connection */
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extern int caml_gr_screen; /* The screen number */
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extern Colormap caml_gr_colormap; /* The color map */
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extern struct canvas caml_gr_window; /* The graphics window */
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extern struct canvas caml_gr_bstore; /* The pixmap used for backing store */
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extern int caml_gr_white, caml_gr_black; /* Black and white pixels for X */
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extern int caml_gr_background; /* Background color for X
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(used for CAML color -1) */
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extern Bool caml_gr_display_modeflag; /* Display-mode flag */
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extern Bool caml_gr_remember_modeflag; /* Remember-mode flag */
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extern int caml_gr_x, caml_gr_y; /* Coordinates of the current point */
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extern int caml_gr_color; /* Current *CAML* drawing color (can be -1) */
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extern XFontStruct * caml_gr_font; /* Current font */
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extern long caml_gr_selected_events; /* Events we are interested in */
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extern Bool caml_gr_ignore_sigio; /* Whether to consume events on sigio */
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extern Bool caml_gr_direct_rgb;
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extern int caml_gr_byte_order;
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extern int caml_gr_bitmap_unit;
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extern int caml_gr_bits_per_pixel;
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#define Wcvt(y) (caml_gr_window.h - 1 - (y))
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#define Bcvt(y) (caml_gr_bstore.h - 1 - (y))
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#define WtoB(y) ((y) + caml_gr_bstore.h - caml_gr_window.h)
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#define BtoW(y) ((y) + caml_gr_window.h - caml_gr_bstore.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 DEFAULT_WINDOW_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 caml_gr_fail(char *fmt, char *arg);
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extern void caml_gr_check_open(void);
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extern unsigned long caml_gr_pixel_rgb(int rgb);
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extern int caml_gr_rgb_pixel(long unsigned int pixel);
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extern void caml_gr_handle_event(XEvent *e);
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extern void caml_gr_init_color_cache(void);
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extern void caml_gr_init_direct_rgb_to_pixel(void);
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extern value caml_gr_id_of_window( Window w );
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