lg_env.h

/*
 *      LibGame - Copyright (C) Emmanuel Thomas-Maurin 2011-2026
 *      All rights reserved
 */
 
#ifndef LG_ENV_H
#define LG_ENV_H
 
typedef struct {
        /*
         * SDL display mode stuff
         */
        int             sdl_display;
        SDL_DisplayMode sdl_display_mode;
        int             sdl_convert_surf_format;                /* For all SDL_ConvertSurfaceFormat() ops */
        int             sdl_create_rgb_surf_bitdepth;           /* For all SDL_CreateRGBSurface() ops */
        int             r_size, g_size, b_size, a_size;
        uint32_t        r_mask, g_mask, b_mask, a_mask;         /* SDL interprets each pixel as a 32-bit integer */
        /*
         * Screen dims
         */
        int             screen_w;
        int             screen_h;
        /*
         * OpenGL ES 3.1 stuff
         */
        SDL_Window      *gl_win;                                /* Top SDL/GL win */
        SDL_GLContext   gl_context;
        /*
         * Opengl ES version >=  3.1
         */
        int             gles_maj_v;
        int             gles_min_v;
        /*
         * GPU
         */
        const char      *gpu_vendor;
        const char      *gpu_renderer;
        /*
         * Top win dims are virtual/logical dims in fullscreen mode.
         * In fullscreen mode, we compute an optimal viewport_rec (with letterboxing)
         * and use scaling, keeping the same aspect ratio (like SDL2 with render logical size set).
         * In windowed mode, viewport_rec and gl_win rec have the same size.
         */
        int             top_win_logical_w;      /* In fullscreen mode, logical w */
        int             top_win_logical_h;      /* In fullscreen mode, logical h */
        Rec2Di          viewport_rec;           /* THE DEFAULT VIEWPORT, COMPUTED DURING INIT, MUST *NOT* BE MODIFIED AFTERWARDS */
        zboolean        fullscreen;             /* Should always be set to TRUE on Android ? Seems it's expected from SDL */
        float           fullscreen_scale;       /* MIN(scale_x, scale_y), to keep aspect ratio */
        /*
         * Texture max values
         */
        int             max_combined_texture_image_units;
        int             max_texture_size;
        int             max_cubemap_texture_size;
        /*
         * Background
         */
        LG_Texture      *bg_uniq_tex;
        LG_Color_u      bg_color;               /* Always set after a call to lg_clear_bg() */
        int             bg_shift_x;             /* Not sure what the purpose was exactly */
        int             bg_shift_y;             /* Not sure what the purpose was exactly */
        /*
         * App stuff
         */
        char            *app_name;
        char            *app_cmd;
        char            *org_name_android;      /* Android-specific */
        char            *app_name_android;      /* Android-specific */
        char            *assets_dir;            /* App data dir on Linux, app assets on Android */
        char            *app_wr_dir;            /* App home dir on Linux, app-specific writable persistent dir on Android */
        char            *app_cache;             /* Sub-dir of app_wr_dir */
        /*
         * Mouse support
         */
        zboolean        enable_mouse;
        /*
         * OpenGL ES extensions support
         */
        zboolean        oes_vao_extension;
        void            (*glGenVertexArraysOES)(GLsizei, GLuint *);
        void            (*glBindVertexArrayOES)(GLuint);
        void            (*glDeleteVertexArraysOES)(GLsizei, const GLuint *);
        void            (*glIsVertexArrayOES)(GLuint);
        zboolean        oes_element_index_uint_extension;
        zboolean        ext_draw_instanced_extension;
        zboolean        ext_texcompr_s3tc_extension;
        zboolean        oes_texcompr_etc1_rgb8_extension;
        zboolean        khr_texcompr_astc_ldr_extension;
        /*zboolean      khr_texcompr_astc_hdr_extension;
        zboolean        ext_texcompr_astc_decode_mode_extension;*/
        /* ES 3.1 and GLES 3.1 geometry shaders extension */
        zboolean        ext_geometry_shader;
        /* This one is also required */
        zboolean        ext_shader_io_blocks;
        /*
         * Other stuff
         */
        LG_ErrorContext last_error_context;
        int             logging_level;
        float           luminosity_k;
        LG_Sound        **sounds;
 
} LG_Env;
 
#endif /* LG_ENV_H */