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/* bubbles.h - definitions for bubbles screensaver */
/* $Id: bubbles.h,v 1.6 2006/02/25 20:11:57 jwz Exp $ */
#ifndef _BUBBLES_H_
#define _BUBBLES_H_
#ifdef HAVE_JWXYZ
# include "jwxyz.h"
#else
# include <X11/Xlib.h>
#endif
/***************************************************************************
* Options you might like to change to affect the program's behaviour *
***************************************************************************/
/*
* Uncommenting the following will enable support for reading bubbles from
* files (using the -file and -directory options to bubbles). This is
* disabled by default since such operations are inherently non-portable
* and we want the program to compile on as many systems as possible.
*
* If you uncomment this and you figure out how to get it working, please
* let me (J.Macnicol@student.anu.edu.au) know. Diffs against the standard
* distribution would be appreciated. Possible sources of problems are
* dirent and possibly the use of tmpnam().
*/
/* #define BUBBLES_IO */
/*
* The following only makes sense if BUBBLES_IO above is defined.
*
* Uncomment the following if you always want to use the -file or
* -directory options on the command line and never to use a default bubble
* compiled into the program. This way you would save memory and disk space
* since if you do use -file or -directory only one bubble will be loaded
* into memory at any one time (and remember the default bubble is really
* uncompressed, unlike bubbles in files which can be compressed). This
* is disabled by default only so people running the program for the first
* time with no knowldege of the command line options don't get error
* messages ;)
*
* NOTE: You will still need to have a bubbles_default.c file, else the
* build sequence will fail. Well constructed bubbles_default.c files
* have #ifdef's which simply exclude everything else in the file at
* compile time. The bubblestodefault script does this.
*/
/* #define NO_DEFAULT_BUBBLE */
/*
* This turns on any debugging messages and sanity checks. Hopefully you
* won't need this :) It slows things down a bit, too.
*
* NOTE: If you uncomment this you will get some messages about unused
* functions when you compile. You can ignore these - they refer to
* convenient checking routines which simply aren't called but are left
* in case someone wants to use them.
*/
/* #define DEBUG */
/***************************************************************************
* Things you might need to change to get things working right *
***************************************************************************/
/*
* Name of the gzip binary. You shouldn't need to change this unless it's
* not in your PATH when the program is run, in which case you will need to
* substitute the full path here. Keep the double quotes else things won't
* compile!
*/
#define GZIP "gzip"
/*
* Likewise for the Bourne shell.
*/
#define BOURNESH "sh"
/*
* The name of the directory entry structure is different under Linux
* (under which this code is being developed) than other systems. The case
* alternate form here is that given in Kernighan & Ritchie's C book (which
* must be authoratitive, no?)
*
* 04/07/96 : People will have to hack this to get it working on some
* systems. I believe it doesn't work on SGI, for example.
*/
#ifdef _POSIX_SOURCE
#define STRUCT_DIRENT struct dirent
#else
#define STRUCT_DIRENT Dirent
#endif
/*
* The naming of fields in struct dirent also seems to differ from system to
* system. This may have to be extended to make things truly portable.
* What we want here is the name field from a dirent struct pointed to
* by "dp".
*
* 04/07/96 : See above. This may need to be changed too.
*/
#ifdef _POSIX_SOURCE
#define DIRENT_NAME dp->d_name
#else
#define DIRENT_NAME dp->name
#endif
/* I don't know why this isn't defined. */
#ifdef linux
/* apparently it is defined in recent linuxes. who knows. */
/*extern char *tempnam(char *, char *);*/
#endif
/****************************************************************************
* Buffer lengths and things you probably won't need to touch *
****************************************************************************/
/* Maximum length of a full path name we can deal with */
#define PATH_BUF_SIZE 1024
/* Size of string passed to shell as command */
#define COMMAND_BUF_SIZE 2500
/* Size increments for read_line() buffers */
#define READ_LINE_BUF_SIZE 24
/* Maximum amount to drop a bubble */
#define MAX_DROPPAGE 20
/****************************************************************************
* End of options *
****************************************************************************/
/* Some machines define M_PI and not PI. If they don't define either, use
own own. Really, the accuracy of this is _not_ very important. */
#ifndef PI
# define PI M_PI
# ifndef M_PI
# define M_PI 3.1415926535
# endif
#endif
/* for delete_bubble_in_mesh() */
#define DELETE_BUBBLE 0
#define KEEP_BUBBLE 1
/* Status codes for read_line */
#define LINE_READ 0
#define EOF_REACHED 1
#define IO_ERROR 2
/*
* Magic number for Bubble struct, in case it's trashed when debugging code
* (which happened to me often.... :(
*/
#define BUBBLE_MAGIC 5674
/* Useful macros */
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#define MIN(A, B) ((A) < (B) ? (A) : (B))
/* How we represent bubbles */
struct bub {
int radius;
int step; /* for rendered bubbles */
long area;
int x;
int y;
int magic;
int cell_index;
int visible;
struct bub *next;
struct bub *prev;
};
typedef struct bub Bubble;
/*
* How we represent pixmaps of rendered bubbles. Because the range of radii
* available may not be continuous, we call each a step (for the lack of a
* better name...)
*/
struct bub_step {
int radius;
long area;
int droppage;
Pixmap ball, shape_mask;
GC draw_gc, erase_gc;
struct bub_step *next;
};
typedef struct bub_step Bubble_Step;
extern void init_default_bubbles(void);
extern int num_default_bubbles;
typedef struct { const unsigned char *png; unsigned long size; } bubble_png;
extern bubble_png default_bubbles[];
#endif /* _BUBBLES_H_ */
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