render.h

#ifndef RENDER_API
#define RENDER_API

#include <stdint.h>
#include <stddef.h>

/*
    @brief
    Defined a struct used internally in library render API  
*/

#if defined(__APPLE__)
  #define RENDER_TAIL_SLACK 0x40
#elif defined(__linux__)
  #define RENDER_TAIL_SLACK 0x200
#else
  #define RENDER_TAIL_SLACK 0x100
#endif

typedef struct Render {
    const char* title;                      // 0x00
    int width;                              // 0x08
    int height;                             // 0x0C
    uint32_t* framebuffer;                  // 0x10
    char _pad_to_handle[0x428 - 0x18];      // padding for native handler
    void* native_window;                    // 0x428 — NSWindow*/X11 handle/etc.
    char _tail_slack[RENDER_TAIL_SLACK];    // Cushion to avoid heap corruption
} Render;                               

_Static_assert(sizeof(Render) >= 0x430, "Window must be at least 0x430 bytes");

#endif // RENDER_API