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// C-ABI surface of the V library. Hand-maintained; ffigen parses this.
#ifndef VFLUTTER_H
#define VFLUTTER_H

#ifdef __cplusplus
extern "C" {
#endif

#if defined(_WIN32)
  #define VF_API __declspec(dllexport)
#else
  #define VF_API __attribute__((visibility("default")))
#endif

// Idempotent. Safe to call from any isolate; required only on platforms
// where the ELF/Mach-O constructor may not have run (iOS static archives).
VF_API void vf_init(void);

VF_API int vf_add(int a, int b);

// Returns a NUL-terminated string allocated by V. Caller MUST release it
// with vf_free. Never free it with Dart's calloc/malloc.
VF_API char *vf_greet(const char *name);

VF_API void vf_free(void *p);

// Fills rows [y0, y1) of a w x h Mandelbrot image as RGBA8888, packed from
// the start of `buf`. The buffer is owned by the CALLER: V allocates nothing
// here and there is nothing to vf_free. Bands are independent, so separate
// calls may run concurrently on different threads/isolates.
//
// `buf` must hold at least (y1 - y0) * w * 4 bytes.
VF_API void vf_mandelbrot(unsigned char *buf, int w, int h, double cx,
                          double cy, double scale, int max_iter, int y0,
                          int y1);

#ifdef __cplusplus
}
#endif
#endif // VFLUTTER_H