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Diffstat (limited to 'hacks/bubbles.h')
| -rw-r--r-- | hacks/bubbles.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/hacks/bubbles.h b/hacks/bubbles.h new file mode 100644 index 0000000..24872e3 --- /dev/null +++ b/hacks/bubbles.h @@ -0,0 +1,208 @@ +/* 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_ */ |