1 /* xscreensaver, Copyright (c) 1992-2008 Jamie Zawinski <jwz@jwz.org>
3 * Permission to use, copy, modify, distribute, and sell this software and its
4 * documentation for any purpose is hereby granted without fee, provided that
5 * the above copyright notice appear in all copies and that both that
6 * copyright notice and this permission notice appear in supporting
7 * documentation. No representations are made about the suitability of this
8 * software for any purpose. It is provided "as is" without express or
12 /* Found in Don Hopkins' .plan file:
14 * The color situation is a total flying circus. The X approach to
15 * device independence is to treat everything like a MicroVax framebuffer
16 * on acid. A truely portable X application is required to act like the
17 * persistent customer in the Monty Python ``Cheese Shop'' sketch. Even
18 * the simplest applications must answer many difficult questions, like:
20 * WHAT IS YOUR DISPLAY?
21 * display = XOpenDisplay("unix:0");
23 * root = RootWindow(display, DefaultScreen(display));
24 * AND WHAT IS YOUR WINDOW?
25 * win = XCreateSimpleWindow(display, root, 0, 0, 256, 256, 1,
26 * BlackPixel(display, DefaultScreen(display)),
27 * WhitePixel(display, DefaultScreen(display)))
28 * OH ALL RIGHT, YOU CAN GO ON.
30 * WHAT IS YOUR DISPLAY?
31 * display = XOpenDisplay("unix:0");
32 * WHAT IS YOUR COLORMAP?
33 * cmap = DefaultColormap(display, DefaultScreen(display));
34 * AND WHAT IS YOUR FAVORITE COLOR?
35 * favorite_color = 0; / * Black. * /
36 * / * Whoops! No, I mean: * /
37 * favorite_color = BlackPixel(display, DefaultScreen(display));
38 * / * AAAYYYYEEEEE!! (client dumps core & falls into the chasm) * /
40 * WHAT IS YOUR DISPLAY?
41 * display = XOpenDisplay("unix:0");
42 * WHAT IS YOUR VISUAL?
43 * struct XVisualInfo vinfo;
44 * if (XMatchVisualInfo(display, DefaultScreen(display),
45 * 8, PseudoColor, &vinfo) != 0)
46 * visual = vinfo.visual;
47 * AND WHAT IS THE NET SPEED VELOCITY OF AN XConfigureWindow REQUEST?
48 * / * Is that a SubStructureRedirectMask or a ResizeRedirectMask? * /
49 * WHAT?! HOW AM I SUPPOSED TO KNOW THAT?
50 * AAAAUUUGGGHHH!!!! (server dumps core & falls into the chasm)
53 #ifndef __SCREENHACK_I_H__
54 #define __SCREENHACK_I_H__
58 #endif /* HAVE_CONFIG_H */
65 /* Which of the ten billion standards does values.h belong to?
66 What systems always have it? */
72 #else /* !HAVE_COCOA -- real X11 */
73 # include <X11/Xlib.h>
74 # include <X11/Xutil.h>
75 # include <X11/Xresource.h>
77 #endif /* !HAVE_COCOA */
79 /* M_PI ought to have been defined in math.h, but... */
81 # define M_PI 3.1415926535
85 # define M_PI_2 1.5707963267
95 #include "resources.h"
98 #include "grabscreen.h"
101 /* Be Posixly correct */
103 #define bzero __ERROR_use_memset_not_bzero_in_xscreensaver__
105 #define bcopy __ERROR_use_memcpy_not_bcopy_in_xscreensaver__
107 #define ftime __ERROR_use_gettimeofday_not_ftime_in_xscreensaver__
109 #define sleep __ERROR_do_not_sleep_in_xscreensaver__
113 struct xscreensaver_function_table {
115 const char *progclass;
116 const char * const *defaults;
117 const XrmOptionDescRec *options;
119 void (*setup_cb) (struct xscreensaver_function_table *, void *);
122 void * (*init_cb) (Display *, Window);
123 unsigned long (*draw_cb) (Display *, Window, void *);
124 void (*reshape_cb) (Display *, Window, void *,
125 unsigned int w, unsigned int h);
126 Bool (*event_cb) (Display *, Window, void *, XEvent *);
127 void (*free_cb) (Display *, Window, void *);
129 Visual * (*pick_visual_hook) (Screen *);
130 Bool (*validate_visual_hook) (Screen *, const char *, Visual *);
134 extern const char *progname;
136 #endif /* __SCREENHACK_I_H__ */