/usr/include/libzia/zsdl.h is in libzia-dev 4.09-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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zsdl.h - SDL utilities
Copyright (C) 2011-2012 Ladislav Vaiz <ok1zia@nagano.cz>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
*/
#ifndef __ZSDL_H
#define __ZSDL_H
#include <libziaint.h>
#ifdef Z_HAVE_SDL
#include <SDL.h>
struct zzsdl {
void (*putpixel)(SDL_Surface *, int x, int y, int color);
int font_w, font_h;
SDL_PixelFormat *format;
int antialiasing, antialiasing_supported;
int inverse;
};
extern struct zzsdl *zsdl;
struct zzsdl *zsdl_init(SDL_Surface *screen, int font_h, int inverse);
void zsdl_free(void);
void z_putpixel8(SDL_Surface *surface, int x, int y, int color);
void z_putpixel16(SDL_Surface *surface, int x, int y, int color);
void z_putpixel24(SDL_Surface *surface, int x, int y, int color);
void z_putpixel32(SDL_Surface *surface, int x, int y, int color);
void z_putpixel8inv(SDL_Surface *surface, int x, int y, int color);
void z_putpixel16inv(SDL_Surface *surface, int x, int y, int color);
void z_putpixel24inv(SDL_Surface *surface, int x, int y, int color);
void z_putpixel32inv(SDL_Surface *surface, int x, int y, int color);
void z_putpixel_fmt(SDL_Surface *surface, int x, int y, int color, SDL_PixelFormat *format);
int z_getpixel8(SDL_Surface *surface, int x, int y);
int z_getpixel16(SDL_Surface *surface, int x, int y);
int z_getpixel24(SDL_Surface *surface, int x, int y);
int z_getpixel32(SDL_Surface *surface, int x, int y);
#define z_putpixel(s, x, y, c) zsdl->putpixel(s, x, y, c)
int z_getpixel(SDL_Surface *surface, int x, int y);
int z_getpixel_fmt(SDL_Surface *surface, int x, int y, SDL_PixelFormat *format);
#define ZFONT_TRANSP 1
#define ZFONT_CENTERX 2
#define ZFONT_CENTERY 4
#define ZFONT_RIGHT 8
#define ZFONT_SYNC 16
#define ZFONT_CHAR 32
#define ZFONT_DOUBLEHT 64
#define ZFONT_DOUBLEHB 128
#define ZFONT_USERHFLG 256
#define ZFONT_OUTLINE 512
#define ZFONT_OUTLINE_FONT 1024
#define ZFONT_USERH(h) (((h << 16) & 0xff0000) | ZFONT_USERHFLG)
void zsdl_printf(SDL_Surface *surface, int x, int y, int color, int bgcolor, int flags, char *m, ...);
int zsdl_h2w(int font_h);
int zsdl_max_font_h(int w, int h, char *text);
short *zfont_create_outline(const short *font, int size_b, int font_h);
int z_clip_pixel(SDL_Rect *clip, int x, int y);
int z_overlapped_pixel(SDL_Rect *clip_rect, int x, int y);
int z_overlapped_rect(SDL_Rect *a, SDL_Rect *b);
int z_overlapped_line(SDL_Rect *clip_rect, int x1, int y1, int x2, int y2);
void z_line(SDL_Surface *surface, int x1, int y1, int x2, int y2, int color);
void z_linea(SDL_Surface *surface, int x1, int y1, int x2, int y2, int color);
void z_do_line(SDL_Surface *surface, int x1, int y1, int x2, int y2, int color,
void (*func)(SDL_Surface *surface, int x, int y, int d) );
void z_triangle(SDL_Surface *surface, int x1, int y1, int x2, int y2, int x3, int y3, int c);
void z_circle(SDL_Surface *surface, int x, int y, int r, int c);
void z_dashfce(SDL_Surface *surface, int x, int y, int d) ;
void z_rect(SDL_Surface *surface, int x1, int y1, int x2, int y2, int c);
void z_rect2(SDL_Surface *surface, SDL_Rect *r, int c);
void z_cross(SDL_Surface *surface, int x, int y, int color, int zoom);
void z_pip(SDL_Surface *surface, int x, int y, int color1, int color2, int zoom);
int z_makecol(int r, int g, int b);
unsigned char z_r(SDL_Surface *surface, int color);
unsigned char z_g(SDL_Surface *surface, int color);
unsigned char z_b(SDL_Surface *surface, int color);
void z_dumpbitmap(SDL_Surface *screen, SDL_Surface *surface);
void zsdl_font_save(SDL_Surface *screen);
int zsdl_font_dump(const char *pngfilename, const char *txtfilename);
int zsdl_font_dump_skip_red(const char *pngfilename, const char *txtfilename);
int zsdl_sys_key_repeat(int delay, int rate);
#endif
struct zzsdl *zsdl_get(void);
void z_disable_screensaver(void);
int zsdl_maximize(struct zzsdl *zsdl, int mode);
int zsdl_maximized(struct zzsdl *zsdl, int *w, int *h);
int z_line_intersect(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4, double *x, double *y);
int z_point_is_in_quadrangle(double xp, double yp, double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4);
#endif
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