| Replace V with Nim 472eb49 nandithebull 13h ago | 1 | // C-ABI surface of the Nim library. Hand-maintained; ffigen parses this. |
| 2 | #ifndef NIMFLUTTER_H |
| 3 | #define NIMFLUTTER_H |
| 4 | |
| 5 | #include <stddef.h> |
| 6 | |
| 7 | #ifdef __cplusplus |
| 8 | extern "C" { |
| 9 | #endif |
| 10 | |
| 11 | #if defined(_WIN32) |
| 12 | #define NF_API __declspec(dllexport) |
| 13 | #else |
| 14 | #define NF_API __attribute__((visibility("default"))) |
| 15 | #endif |
| 16 | |
| 17 | // Runs NimMain. Idempotent. Shared builds run it from a library constructor, |
| 18 | // but static archives (iOS) have no such hook, so call this first. |
| 19 | NF_API void nf_init(void); |
| 20 | |
| 21 | NF_API int nf_add(int a, int b); |
| 22 | |
| 23 | // Returns a NUL-terminated string allocated by Nim on the SHARED heap. |
| 24 | // Caller MUST release it with nf_free. Never free it with Dart's calloc. |
| 25 | NF_API char *nf_greet(const char *name); |
| 26 | |
| 27 | NF_API void nf_free(void *p); |
| 28 | |
| 29 | // Fills rows [y0, y1) of a w x h Mandelbrot image as RGBA8888, packed from |
| 30 | // the start of `buf`. The buffer is owned by the CALLER: Nim allocates |
| 31 | // nothing here and there is nothing to nf_free. Bands are independent, so |
| 32 | // separate calls may run concurrently on different threads/isolates. |
| 33 | // |
| 34 | // `buf_len` is how many bytes `buf` holds; it must be at least |
| 35 | // (y1 - y0) * w * 4. Every rejection is all-or-nothing — a buffer one byte |
| 36 | // short writes nothing at all, rather than filling what fits, since partial |
| 37 | // output is indistinguishable from a rendered frame. The size is computed in |
| 38 | // 64-bit, because that product overflows int32 for plausible geometry. |
| 39 | NF_API void nf_mandelbrot(unsigned char *buf, size_t buf_len, int w, int h, |
| 40 | double cx, double cy, double scale, int max_iter, |
| 41 | int y0, int y1); |
| 42 | |
| 43 | #ifdef __cplusplus |
| 44 | } |
| 45 | #endif |
| 46 | #endif // NIMFLUTTER_H |