libgame.h

/*
 *      LibGame - Copyright (C) Emmanuel Thomas-Maurin 2011-2026
 *      All rights reserved
 *
 *      LibGame is a SDL2/OpenGL ES 3.1 2D/3D minimalist game engine, which doesn't
 *      attempt to do *everything* but does only certain things and does them *well*,
 *      while not preventing you from doing other things (huh ?)
 *
 *      This version supports both Linux Desktop and Android (with NDK).
 */
 
#ifndef LIBGAME_H
#define LIBGAME_H
 
#ifndef _GNU_SOURCE
  #define _GNU_SOURCE
#endif
#ifndef _ISOC11_SOURCE
  #define _ISOC11_SOURCE
#endif
 
#define LIBGAME_NAME                    "LibGame"
#define LIBGAME_V_NUM                   "0.4.0~beta-20260914"
#define LIBGAME_COPYRIGHT_STR           "Copyright (C) Emmanuel Thomas-Maurin 2012-2026 - All rights reserved"
 
#define LIBGAME_WEBSITE                 "https://www.etmsoftware.com"   /*"https://www.aetm-games.com"*/
#define LIBGAME_DOWNLOAD_WEBSITE        LIBGAME_WEBSITE "/download.php"
#define LIBGAME_SUPPORT_WEBSITE         LIBGAME_WEBSITE "/help.php"
#define LIBGAME_SUPPORT_EMAIL           "[email protected]"       /*"[email protected]"*/
 
#if !defined(ANDROID_V) && !defined(WIN32_V)
  #define LINUX_V
#endif
 
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <math.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <byteswap.h>
#include <stdalign.h>
#include <limits.h>
#ifndef WIN32_V                 /* Linux and Android versions */
  #include <grp.h>
  #include <pwd.h>
  #include <signal.h>
  #include <sys/mman.h>
#else
  #include <direct.h>
#endif
 
#ifdef ANDROID_V
  #include <jni.h>
  #include <android/log.h>
#endif
 
#ifndef WIN32_V                 /* Linux and Android versions */
  #include <SDL.h>
  #include <SDL_image.h>
  #include <SDL_mixer.h>
  #include <SDL_ttf.h>
  #include <SDL_syswm.h>
  #ifdef LINUX_V
    #include <SDL_mouse.h>
  #endif
#else                           /* Not tested */
  #include <SDL.h>
  #include <SDL2/SDL_image.h>
  #include <SDL2/SDL_mixer.h>
  #include <SDL2/SDL_ttf.h>
  #include <SDL_mouse.h>
  #include <SDL_syswm.h>
#endif
 
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GLES3/gl3.h>
#include <GLES3/gl3ext.h>
 
/* === For LibGame, use VERBOSE_OUTPUT and DEBUG_OUTPUT, *not* these token below === */
 
/* Logging stuff for libetm - must appear before #include libetm.h */
#define LIBETM_VERBOSE_OUTPUT
/*#define LIBETM_DEBUG_OUTPUT*/
 
/* LIBETM_DEBUG_OUTPUT implies LIBETM_VERBOSE_OUTPUT */
#ifdef LIBETM_DEBUG_OUTPUT
  #ifndef LIBETM_VERBOSE_OUTPUT
    #define LIBETM_VERBOSE_OUTPUT
  #endif
#endif
 
#ifdef ANDROID_V
  #include "../extra_libs/libetm-0.6.0/libetm.h"
#else
  #ifndef WIN32_V               /* Linux version */
    #include <libetm/libetm.h>
  #else
    #include "../extra_libs/libetm-0.6.0/libetm.h"
  #endif
#endif
 
#ifndef ANDROID_V
  #undef INFO_ERR
  #define INFO_ERR INFO_ERR2
#endif
 
/* === Now, the LibGame verbose and debug tokens are just below === */
 
#define VERBOSE_OUTPUT
//#define DEBUG_OUTPUT  /* This is actually the real verbose output */
 
#ifdef DEBUG_OUTPUT
  #ifndef VERBOSE_OUTPUT
    #define VERBOSE_OUTPUT
  #endif
#endif
 
#ifdef DEBUG_OUTPUT
  #define DEBUG_INFO_OUT(...) \
        {\
                fprintf(STD_OUT, FILE_LINE_FUNC_STR);\
                INFO_OUT(__VA_ARGS__)\
        }
#else
  #define DEBUG_INFO_OUT(...) \
        {}
#endif
 
typedef enum {LG_NONE, LG_INFO, LG_VERBOSE, LG_DEBUG} env_logging_level;
 
#define TMPSTR_SIZE             ((4 * 1024) - 1)        /* = 4 KiB - 1 */
#define FILE_NAME_MAXLEN        ((2 * 1024) - 1)        /* = 2 KiB - 1 */
 
/* Adding some space */
#define EXTRA_NEWLINES
#ifdef EXTRA_NEWLINES
  #define __extra_newline__     INFO_OUT("\n")
#else
  #define __extra_newline__
#endif
 
#ifdef LIBGAME_COMPILE_TIME
  #include "../extra_libs/math_3d.h"
  #include "../extra_libs/stb_image.h"
  #include "../extra_libs/ufbx.h"
#else
  #include <libgame/extra_libs/math_3d.h>
  #include <libgame/extra_libs/stb_image.h>
  #include <libgame/extra_libs/ufbx.h>
#endif
 
/* Which order for header files ? */
 
//#include "lg_limits.h"
#include "lg_vbo.h"
#include "lg_shader_progs.h"
#include "lg_vertex.h"
#include "lg_vertex_info.h"
#include "lg_gr_func.h"
#include "lg_goodies.h"
#include "lg_textures.h"
#include "lg_dds_loader.h"
#include "lg_astc_loader.h"
#include "lg_string.h"
#include "lg_sprites.h"
#include "lg_background.h"
#include "lg_fonts.h"
#include "lg_wins.h"
#include "lg_keyboard.h"
#include "lg_mouse.h"
#include "lg_touchscreen.h"
#include "lg_audio.h"
#include "lg_dirs_stuff.h"
#include "lg_quaternions.h"
#include "lg_misc.h"
#include "lg_ui.h"
#include "lg_3d_primitives.h"
#include "lg_opengl_2d.h"
#include "lg_mesh.h"
#include "lg_camera.h"
#include "lg_obj_parser.h"
#include "lg_light.h"
#include "lg_scene_graph.h"
#include "lg_scene.h"
#include "lg_collision_detect.h"
#include "lg_admob.h"
#include "lg_vao_gl_ext.h"
#include "lg_cubemap.h"
#include "lg_error.h"
#include "lg_file_ops.h"
#include "lg_android_assets.h"
#include "lg_render.h"
#include "lg_terrain.h"
#include "lg_perlin_noise.h"
#include "lg_landscape.h"
#include "lg_fbx_parser.h"
#include "lg_cam_controls.h"
#include "lg_part_sys.h"
//#include "lg_goodies.h"
#include "lg_arena.h"
#include "lg_mesh_lines.h"
#include "lg_mem.h"
#include "lg_grid_geom_shader.h"
#include "lg_android_app_exit.h"
 
/* OK ? */
#include "lg_env.h"
#include "lg_env_instance.h"
#include "lg_math_extra.h"
#include "lg_limits.h"
 
typedef enum {
        LG_OK = LIBETM_LASTERRORCODE + 1,
        LG_ERROR,
        LG_INIT_ERROR,
        LG_EXTRA_LIB_INIT_ERROR,
        LG_OPENGL_ERROR,
        LG_GLSL_ERROR,
        LG_CREATE_FILE_ERROR,
        LG_OPEN_FILE_ERROR,
        LG_SAVE_FILE_ERROR,
        LG_READ_FROM_FILE_ERROR,
        LG_WRITE_TO_FILE_ERROR,
        LG_FILE_ACCESS_ERROR,
        LG_READ_FROM_FILE_EOF,
        LG_EOF,
        LG_SIZE_IS_ZERO,
        LG_FREE_NULL,
        LG_OOM,
        LG_AOOM,                                /* LG_Arena out of reserved memory */
        LG_SIG_START,                           /* For Unix signals, error code = LG_SIG_START + signal value */
        LG_SIG_END = LG_SIG_START + 100,        /* Must really be the last one */
        LG_NODE_IS_NOT_A_LEAF,
        LG_LASTERRORCODE
} lg_error_code;
 
typedef enum {
        LG_CONTINUE = LG_LASTERRORCODE + 1,
        LG_CANCEL,
        LG_QUIT,
        LG_WON,
        LG_LOST,
        LG_LASTRETURNCODE
} lg_return_code;
 
/* SDL2 vsync stuff */
#define NEVER_VSYNC     0
#define ALWAYS_VSYNC    1
#define ADAPTIVE_VSYNC  -1
 
typedef struct {
        int             i;
        const char      *str;
} Vsync;
 
/*
 * WIN_LOGICAL_W and WIN_LOGICAL_H must be defined in app
 *      16/9 or (on new mobiles) 18/9 aspect ratio ?
 *      #define WIN_LOGICAL_W           1000
 *      #define WIN_LOGICAL_H           500
 * On Android, we *always* want/use landscape orientation
 */
#define LG_WIN_WIDTH_MIN        800
#define LG_WIN_HEIGHT_MIN       400
 
#define LG_WIN_D_HEIGHT_HACK    2       /* DIRTY HACK: We want the whole win to be visible - actually, what was it about ? */
 
/* Requested bit-depth */
#define LG_REQUESTED_RED_SIZE           5
#define LG_REQUESTED_GREEN_SIZE         6
#define LG_REQUESTED_BLUE_SIZE          5
#define LG_REQUESTED_ALPHA_SIZE         0
#define LG_REQUESTED_DEPTH_SIZE         16
#define LG_REQUESTED_STENCIL_SIZE       8
 
int             lg_init(int, int, const char *, const char *, const char *, const char *, const char *, const char *, const char *);
 
Rec2Di          lg_get_default_viewport();
 
void            lg_set_new_viewport(Rec2Di);
 
void            lg_reset_viewport();
 
void            lg_enable_mouse();
 
void            lg_disable_mouse();
 
void            lg_list_opengl_extensions();
 
zboolean        lg_load_engine_fonts();
 
void            lg_engine_fonts_info();
 
void            lg_quit(int, zboolean);
 
void            lg_swap_fb();
 
void            lg_update_gl_win_title(const char *);
 
void            lg_show_lib_info();
 
void            lg_show_sys_info();
 
char            *lg_sys_info_to_string();
 
void            lg_show_extra_sys_info(SDL_Window *);
 
zboolean        sdl2_is_installed();
 
/* Must be freed afterwards with l_str_free() */
char            *lg_get_sdl_win_flags(SDL_Window *);
 
#endif /* LIBGAME_H */