Skip to main content

yog_abi/
lib.rs

1//! Yog stable C ABI — the ONLY types that cross the mod/runtime boundary.
2//!
3//! Rules this file must never break:
4//!  - Every type is `#[repr(C)]`.
5//!  - No Rust trait objects, no generics, no std types in public structs.
6//!  - New fields are appended only at the END of structs; increment `ABI_MINOR`.
7//!  - ABI_MAJOR bumps only when an existing field is removed or reordered.
8//!
9//! Mods and the runtime are compiled independently. They are compatible when
10//! `ABI_MAJOR` matches and `mod_ABI_MINOR <= runtime_ABI_MINOR`.
11
12use std::os::raw::c_void;
13
14// ── Version ──────────────────────────────────────────────────────────────────
15
16pub const ABI_MAJOR: u32 = 0;
17pub const ABI_MINOR: u32 = 25;
18/// `ABI_MAJOR * 10_000 + ABI_MINOR`.  Checked at mod load time.
19pub const ABI_VERSION: u32 = ABI_MAJOR * 10_000 + ABI_MINOR;
20
21// ── Primitive types ───────────────────────────────────────────────────────────
22
23/// Borrowed UTF-8 byte slice passed to a function. NOT null-terminated.
24/// Valid only for the duration of the call that provides it — never store.
25#[repr(C)]
26#[derive(Copy, Clone)]
27pub struct YogStr {
28    pub ptr: *const u8,
29    pub len: u32,
30}
31
32impl YogStr {
33    pub const EMPTY: Self = Self { ptr: std::ptr::null(), len: 0 };
34
35    #[inline]
36    pub fn from_str(s: &str) -> Self {
37        Self { ptr: s.as_ptr(), len: s.len() as u32 }
38    }
39
40    #[inline]
41    pub fn is_empty(self) -> bool { self.len == 0 || self.ptr.is_null() }
42
43    /// SAFETY: `ptr` must be valid UTF-8 of `len` bytes for at least the
44    /// duration of the call that provided this `YogStr`.
45    #[inline]
46    pub unsafe fn as_str<'a>(self) -> &'a str {
47        if self.ptr.is_null() || self.len == 0 {
48            return "";
49        }
50        std::str::from_utf8_unchecked(std::slice::from_raw_parts(self.ptr, self.len as usize))
51    }
52}
53
54/// Heap-allocated UTF-8 string owned by the RUNTIME.
55/// `ptr == null` encodes `None` / "not found".
56/// When `ptr` is non-null the caller MUST free it via `YogServer::free_str`.
57#[repr(C)]
58#[derive(Copy, Clone)]
59pub struct YogOwnedStr {
60    pub ptr: *mut u8,
61    pub len: u32,
62}
63
64impl YogOwnedStr {
65    pub const NONE: Self = Self { ptr: std::ptr::null_mut(), len: 0 };
66
67    /// Allocate a new `YogOwnedStr` from a Rust `String`.
68    pub fn from_string(s: String) -> Self {
69        let len = s.len() as u32;
70        let ptr = Box::into_raw(s.into_bytes().into_boxed_slice()) as *mut u8;
71        Self { ptr, len }
72    }
73
74    #[inline]
75    pub fn is_none(self) -> bool { self.ptr.is_null() }
76}
77
78/// Integer 3-D block position.
79#[repr(C)]
80#[derive(Copy, Clone)]
81pub struct YogBlockPos {
82    pub x: i32,
83    pub y: i32,
84    pub z: i32,
85}
86
87/// Float 3-D vector (position, velocity, …).
88#[repr(C)]
89#[derive(Copy, Clone)]
90pub struct YogVec3 {
91    pub x: f64,
92    pub y: f64,
93    pub z: f64,
94}
95
96// ── Event structs (Java → Rust) ───────────────────────────────────────────────
97
98#[repr(C)]
99pub struct YogBlockBreakEvent {
100    pub player: YogStr,
101    pub block:  YogStr,
102    pub pos:    YogBlockPos,
103}
104
105#[repr(C)]
106pub struct YogChatEvent {
107    pub player:  YogStr,
108    pub message: YogStr,
109}
110
111/// Shared by player_join and player_leave.
112#[repr(C)]
113pub struct YogPlayerEvent {
114    pub player: YogStr,
115    pub uuid:   YogStr,
116}
117
118#[repr(C)]
119pub struct YogUseItemEvent {
120    pub player: YogStr,
121    pub item:   YogStr,
122    /// ABI minor 25: whether the player was sneaking (shift) during use.
123    pub sneaking: bool,
124}
125
126#[repr(C)]
127pub struct YogUseBlockEvent {
128    pub player: YogStr,
129    pub block:  YogStr,
130    pub pos:    YogBlockPos,
131}
132
133#[repr(C)]
134pub struct YogAttackEntityEvent {
135    pub player:      YogStr,
136    pub target_type: YogStr,
137    pub target_uuid: YogStr,
138}
139
140#[repr(C)]
141pub struct YogEntityDamageEvent {
142    pub entity_type: YogStr,
143    pub uuid:        YogStr,
144    pub amount:      f32,
145    pub source:      YogStr,
146}
147
148#[repr(C)]
149pub struct YogEntityDeathEvent {
150    pub entity_type: YogStr,
151    pub uuid:        YogStr,
152    pub source:      YogStr,
153}
154
155#[repr(C)]
156pub struct YogEntitySpawnEvent {
157    pub entity_type: YogStr,
158    pub uuid:        YogStr,
159    pub dimension:   YogStr,
160}
161
162/// Fired when a player dies (Pre: before death is processed; Post: after death).
163/// Pre phase — return false to prevent death (keep entity alive at 0.5 HP).
164#[repr(C)]
165pub struct YogPlayerDeathEvent {
166    pub player: YogStr,
167    pub uuid:   YogStr,
168    /// Damage source identifier, e.g. `"player"`, `"fall"`.
169    pub source: YogStr,
170}
171
172/// Fired when a player respawns after death.
173#[repr(C)]
174pub struct YogPlayerRespawnEvent {
175    pub player:    YogStr,
176    pub uuid:      YogStr,
177    /// True if respawning at a bed or anchor, false at world spawn.
178    pub at_anchor: bool,
179}
180
181/// Fired when a player earns an advancement (Post only).
182#[repr(C)]
183pub struct YogAdvancementEvent {
184    pub player:      YogStr,
185    pub uuid:        YogStr,
186    /// Namespaced id, e.g. `"minecraft:story/mine_stone"`.
187    pub advancement: YogStr,
188}
189
190/// Fired when a player right-clicks (interacts with) an entity (Pre: before; Post: after).
191/// Pre phase — return false to cancel the interaction.
192#[repr(C)]
193pub struct YogEntityInteractEvent {
194    pub player:      YogStr,
195    pub player_uuid: YogStr,
196    pub entity_type: YogStr,
197    pub entity_uuid: YogStr,
198    /// `"main_hand"` or `"off_hand"`.
199    pub hand:        YogStr,
200}
201
202/// Fired when a player takes a crafted item from a crafting output slot (Post only).
203#[repr(C)]
204pub struct YogCraftEvent {
205    pub player:       YogStr,
206    pub player_uuid:  YogStr,
207    pub result_item:  YogStr,
208    pub result_count: u32,
209}
210
211/// Fired when an explosion occurs in a world (Pre: before block destruction; Post: after).
212/// Pre phase — return false to cancel the explosion (block and entity damage suppressed).
213#[repr(C)]
214pub struct YogExplosionEvent {
215    pub dimension:    YogStr,
216    pub x:            f64,
217    pub y:            f64,
218    pub z:            f64,
219    pub power:        f32,
220    /// UUID of the entity that caused the explosion, or empty if world/tnt.
221    pub cause_uuid:   YogStr,
222}
223
224// ── ABI minor 9–10 event structs ──────────────────────────────────────────────
225
226/// Fired when a player picks up an item entity (Pre: cancellable; Post: informational).
227#[repr(C)]
228pub struct YogItemPickupEvent {
229    pub player:      YogStr,
230    pub player_uuid: YogStr,
231    /// Registry id of the item, e.g. `"minecraft:diamond"`.
232    pub item_id:     YogStr,
233    pub item_count:  u32,
234    /// UUID of the item entity that was picked up.
235    pub entity_uuid: YogStr,
236}
237
238/// Fired when a player sends a movement packet (Post only; very high frequency).
239#[repr(C)]
240pub struct YogPlayerMoveEvent {
241    pub player:      YogStr,
242    pub player_uuid: YogStr,
243    pub x: f64,
244    pub y: f64,
245    pub z: f64,
246    pub yaw:   f32,
247    pub pitch: f32,
248}
249
250/// Fired when a player opens a container screen (Pre: cancellable; Post: informational).
251/// `container_type` is the screen handler registry id, e.g. `"minecraft:chest"`.
252/// Empty string if the type is not in the registry (e.g. the player inventory).
253#[repr(C)]
254pub struct YogContainerOpenEvent {
255    pub player:         YogStr,
256    pub player_uuid:    YogStr,
257    pub container_type: YogStr,
258}
259
260/// Fired when a player closes a container screen (Post only).
261#[repr(C)]
262pub struct YogContainerCloseEvent {
263    pub player:      YogStr,
264    pub player_uuid: YogStr,
265}
266
267/// Fired when a persistent projectile (arrow, trident) hits a target (Pre: cancellable).
268/// Pre phase — return false to cancel the hit (projectile passes through).
269#[repr(C)]
270pub struct YogProjectileHitEvent {
271    /// Registry id of the projectile, e.g. `"minecraft:arrow"`.
272    pub projectile_type: YogStr,
273    pub projectile_uuid: YogStr,
274    /// UUID of the entity that shot/threw this projectile, or empty.
275    pub shooter_uuid:    YogStr,
276    /// `"block"` or `"entity"`.
277    pub hit_type:        YogStr,
278    /// UUID of the entity that was hit (empty for block hits).
279    pub hit_entity_uuid: YogStr,
280    pub x: f64,
281    pub y: f64,
282    pub z: f64,
283    pub dimension: YogStr,
284}
285
286/// Fired when a player places a block (Pre: before placement; Post: after).
287#[repr(C)]
288pub struct YogPlaceBlockEvent {
289    pub player: YogStr,
290    pub block:  YogStr,
291    pub pos:    YogBlockPos,
292}
293
294#[repr(C)]
295pub struct YogPacketEvent {
296    pub channel:     YogStr,
297    pub player:      YogStr, // empty string on client-received packets
298    pub payload:     *const u8,
299    pub payload_len: u32,
300}
301
302#[repr(C)]
303pub struct YogCommandEvent {
304    pub name:   YogStr,
305    pub args:   YogStr,
306    pub source: YogStr,
307    pub uuid:   YogStr,
308}
309
310/// A startup grant definition — items/books to give on first join.
311#[repr(C)]
312pub struct YogStartupGrantDef {
313    pub id:    YogStr,
314    pub items: YogStr, // '|'-separated item ids
315    pub book:  YogStr, // empty = none
316    pub command: YogStr, // empty = none
317}
318
319// ── Content definition structs (mod → runtime) ────────────────────────────────
320
321#[repr(C)]
322pub struct YogItemDef {
323    pub id:              YogStr,
324    pub max_stack:       u32,
325    pub name:            YogStr, // empty = no override
326    pub tooltip:         YogStr, // empty = none
327    pub max_damage:      u32,
328    pub fire_resistant:  bool,
329    pub fuel_ticks:      u32,
330    pub food_nutrition:  u32,    // 0 = not a food item
331    pub food_saturation: f32,
332    pub food_always_eat: bool,
333}
334
335#[repr(C)]
336pub struct YogBlockDef {
337    pub id:            YogStr,
338    pub hardness:      f32,
339    pub resistance:    f32,
340    pub name:          YogStr,
341    pub light_level:   u8,
342    pub sound:         YogStr,   // empty = default stone sound
343    pub requires_tool: bool,
344    pub no_collision:  bool,
345    pub slipperiness:  f32,
346    /// Bounding box in pixels: `[x1, y1, z1, x2, y2, z2]`. All zeros = full cube.
347    pub shape:         [f32; 6],
348}
349
350// ── ABI minor 10 client event structs ─────────────────────────────────────────
351
352/// Key press / release / repeat from the keyboard (client-side only).
353#[repr(C)]
354#[derive(Copy, Clone)]
355pub struct YogKeyPressEvent {
356    /// GLFW key code (e.g. `GLFW_KEY_E = 69`).
357    pub key_code:  i32,
358    pub scan_code: i32,
359    /// 0 = release, 1 = press, 2 = repeat.
360    pub action:    i32,
361    /// Modifier bitmask: 1=shift, 2=ctrl, 4=alt, 8=super.
362    pub modifiers: i32,
363}
364
365// ── Handler function-pointer types ────────────────────────────────────────────
366//
367// All event handlers receive a `phase: u8` argument:
368//   0 = Pre  — fires before the action; return value matters (false = cancel).
369//   1 = Post — fires after the action; return value is ignored.
370//
371// This unified signature lets one registered closure handle both phases.
372//
373// Client-side handlers (minor 10) do NOT receive a `YogServer*` — they run on
374// the render thread and have no server context.
375
376pub type YogBlockBreakFn   = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogBlockBreakEvent,   u8) -> bool;
377pub type YogChatFn         = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogChatEvent,         u8) -> bool;
378pub type YogPlayerFn       = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPlayerEvent,       u8) -> bool;
379pub type YogUseItemFn      = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogUseItemEvent,      u8) -> bool;
380pub type YogUseBlockFn     = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogUseBlockEvent,     u8) -> bool;
381pub type YogAttackEntityFn = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogAttackEntityEvent, u8) -> bool;
382pub type YogEntityDamageFn = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogEntityDamageEvent, u8) -> bool;
383pub type YogEntityDeathFn  = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogEntityDeathEvent,  u8) -> bool;
384pub type YogEntitySpawnFn   = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogEntitySpawnEvent,   u8) -> bool;
385pub type YogPlaceBlockFn    = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPlaceBlockEvent,    u8) -> bool;
386pub type YogPlayerDeathFn   = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPlayerDeathEvent,   u8) -> bool;
387pub type YogPlayerRespawnFn = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPlayerRespawnEvent, u8) -> bool;
388pub type YogAdvancementFn      = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogAdvancementEvent,      u8) -> bool;
389pub type YogEntityInteractFn   = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogEntityInteractEvent,   u8) -> bool;
390pub type YogCraftFn            = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogCraftEvent,            u8) -> bool;
391pub type YogExplosionFn        = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogExplosionEvent,        u8) -> bool;
392pub type YogItemPickupFn       = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogItemPickupEvent,       u8) -> bool;
393pub type YogPlayerMoveFn       = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPlayerMoveEvent,       u8) -> bool;
394pub type YogContainerOpenFn    = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogContainerOpenEvent,    u8) -> bool;
395pub type YogContainerCloseFn   = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogContainerCloseEvent,   u8) -> bool;
396pub type YogProjectileHitFn    = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogProjectileHitEvent,    u8) -> bool;
397
398/// Packet events — always Post, no phase.
399pub type YogPacketFn  = unsafe extern "C" fn(*mut c_void, *const YogServer, *const YogPacketEvent);
400/// Server lifecycle / tick — no event struct, always fires.
401pub type YogServerFn  = unsafe extern "C" fn(*mut c_void, *const YogServer);
402/// Command handler.
403pub type YogCommandFn = unsafe extern "C" fn(
404    ud: *mut c_void,
405    srv: *const YogServer,
406    ev: *const YogCommandEvent,
407    reply_buf: *mut u8,
408    reply_cap: u32,
409    reply_len: *mut u32,
410);
411/// Scheduler handler (once or repeating).
412pub type YogScheduledFn = unsafe extern "C" fn(*mut c_void, *const YogServer);
413
414// ── ABI minor 10 — client-side function pointer types ────────────────────────
415
416/// Client tick — no event, no server context.
417pub type YogClientFn = unsafe extern "C" fn(ud: *mut c_void);
418/// HUD render — `gfx` is the graphics context for this frame; only valid for
419/// the call duration.  `draw2d_*` functions in `gfx` work here.
420pub type YogUIEventFn = unsafe extern "C" fn(ud: *mut c_void, ui_id: YogStr, event_id: YogStr);
421pub type YogHudRenderFn = unsafe extern "C" fn(ud: *mut c_void, gfx: *const YogGfxApi);
422/// World render — `gfx` contains `view_proj` and `camera_pos` for 3D rendering.
423/// Valid only for the call duration.
424pub type YogWorldRenderFn = unsafe extern "C" fn(ud: *mut c_void, gfx: *const YogGfxApi);
425/// Key press — return `false` to cancel (prevent Minecraft from processing the key).
426pub type YogKeyPressFn  = unsafe extern "C" fn(ud: *mut c_void, ev: *const YogKeyPressEvent) -> bool;
427/// Screen event — `screen_class` is the simple class name (e.g. `"InventoryScreen"`).
428/// For `on_screen_open` return `false` to prevent the screen from opening.
429pub type YogScreenFn    = unsafe extern "C" fn(ud: *mut c_void, screen_class: YogStr) -> bool;
430
431// ── ABI minor 14 — low-level GPU pipeline ────────────────────────────────────
432
433/// Low-level GPU context passed to render handlers.
434///
435/// Provides direct access to the OpenGL pipeline: buffer objects, vertex arrays,
436/// shader programs, textures, draw calls, and render state.
437///
438/// The per-frame fields (`screen_w/h`, `delta_tick`, `view_proj`, `camera_pos`)
439/// are filled by the runtime before calling the handler; the function pointers
440/// point to statically-allocated implementations.
441///
442/// Valid only for the duration of the render callback — never store the pointer.
443/// GPU resource **handles** (`u32`) may be stored between frames.
444///
445/// Colors are `0xAARRGGBB` (Minecraft convention).
446#[repr(C)]
447#[derive(Copy, Clone)]
448pub struct YogGfxApi {
449    // ── Per-frame context ─────────────────────────────────────────────────────
450    /// GUI-pixel screen width.
451    pub screen_w:   i32,
452    /// GUI-pixel screen height.
453    pub screen_h:   i32,
454    /// Partial-tick interpolation factor (0.0–1.0).
455    pub delta_tick:   f32,
456    /// GUI scale factor: physical pixels per GUI pixel (e.g. 2.0 for 2× GUI scale).
457    /// Useful for converting GUI-pixel coordinates to physical pixels for OpenGL calls.
458    pub scale_factor: f32,
459    /// View-projection matrix in camera-relative space (column-major, 16 × f32).
460    /// All zeros during `on_hud_render`; filled during `on_world_render`.
461    pub view_proj:  [f32; 16],
462    /// Camera world-space position.  All zeros during `on_hud_render`.
463    pub camera_pos:  [f32; 3],
464    /// Local player world-space position (eye height).  All zeros during `on_hud_render`.
465    /// Differs from `camera_pos` in third-person view.
466    pub player_pos:  [f32; 3],
467    pub _pad1:       f32,
468
469    // ── GPU buffers ───────────────────────────────────────────────────────────
470    /// Allocate a new GPU buffer (VBO / EBO). Returns 0 on failure.
471    pub buf_create:  unsafe extern "C" fn() -> u32,
472    /// Delete a buffer created by `buf_create`.
473    pub buf_delete:  unsafe extern "C" fn(handle: u32),
474    /// Upload `len` bytes from `bytes` into `handle`.
475    /// `dynamic`: hints frequent updates (`GL_DYNAMIC_DRAW` vs `GL_STATIC_DRAW`).
476    pub buf_data:    unsafe extern "C" fn(handle: u32, bytes: *const u8, len: u32, dynamic: bool),
477    /// Overwrite `len` bytes at `offset` in `handle`.
478    pub buf_subdata: unsafe extern "C" fn(handle: u32, offset: u32, bytes: *const u8, len: u32),
479
480    // ── Vertex arrays ─────────────────────────────────────────────────────────
481    /// Create a vertex array object. Returns 0 on failure.
482    pub vao_create: unsafe extern "C" fn() -> u32,
483    /// Delete a VAO created by `vao_create`.
484    pub vao_delete: unsafe extern "C" fn(handle: u32),
485    /// Declare one vertex attribute in `vao`, sourced from `vbo`.
486    /// `dtype`: 0=f32, 1=u8, 2=i32, 3=u32.
487    pub vao_attrib: unsafe extern "C" fn(
488        vao: u32, vbo: u32, index: u32, components: u8,
489        dtype: u8, normalized: bool, stride: u32, offset: u32,
490    ),
491    /// Bind an index buffer (EBO) to `vao`.
492    pub vao_set_ebo: unsafe extern "C" fn(vao: u32, ebo: u32),
493
494    // ── Shader programs ───────────────────────────────────────────────────────
495    /// Compile + link `vert_src` / `frag_src` (GLSL 150 core).
496    /// Writes the program handle to `*out`. Returns false and logs on error.
497    pub prog_create:       unsafe extern "C" fn(vert: YogStr, frag: YogStr, out: *mut u32) -> bool,
498    /// Delete a shader program.
499    pub prog_delete:       unsafe extern "C" fn(handle: u32),
500    pub prog_uniform_1i:   unsafe extern "C" fn(prog: u32, name: YogStr, v: i32),
501    pub prog_uniform_1f:   unsafe extern "C" fn(prog: u32, name: YogStr, v: f32),
502    pub prog_uniform_2f:   unsafe extern "C" fn(prog: u32, name: YogStr, x: f32, y: f32),
503    pub prog_uniform_3f:   unsafe extern "C" fn(prog: u32, name: YogStr, x: f32, y: f32, z: f32),
504    pub prog_uniform_4f:   unsafe extern "C" fn(prog: u32, name: YogStr, x: f32, y: f32, z: f32, w: f32),
505    /// Set a mat4 uniform from 16 column-major floats.
506    pub prog_uniform_mat4: unsafe extern "C" fn(prog: u32, name: YogStr, col_major: *const f32),
507
508    // ── Textures ──────────────────────────────────────────────────────────────
509    /// Upload RGBA8 pixel data as a new texture.
510    /// `linear`: `GL_LINEAR` if true, `GL_NEAREST` if false.
511    pub tex_create:  unsafe extern "C" fn(w: u32, h: u32, rgba: *const u8, linear: bool) -> u32,
512    /// Delete a texture created by `tex_create`.
513    pub tex_delete:  unsafe extern "C" fn(handle: u32),
514    /// Bind `handle` to texture unit `unit` (0–7).
515    pub tex_bind:    unsafe extern "C" fn(unit: u32, handle: u32),
516    /// Return the GL texture handle Minecraft uses for a namespaced resource
517    /// (e.g. `"minecraft:textures/gui/icons.png"`). Returns 0 if not found.
518    /// Do **not** delete handles obtained this way — Minecraft owns them.
519    pub tex_from_mc: unsafe extern "C" fn(id: YogStr) -> u32,
520
521    // ── Draw calls ────────────────────────────────────────────────────────────
522    /// Draw `count` primitives from `vao`, using shader `prog`.
523    /// `mode`: 0=Triangles, 1=Lines, 2=LineStrip, 3=TriangleStrip, 4=TriangleFan.
524    pub draw_arrays:   unsafe extern "C" fn(vao: u32, prog: u32, mode: u8, first: u32, count: u32),
525    /// Draw indexed primitives.  `ebo` must be bound to `vao` via `vao_set_ebo`.
526    /// `u32_idx`: `true` for `u32` indices, `false` for `u16` indices.
527    pub draw_elements: unsafe extern "C" fn(vao: u32, ebo: u32, prog: u32, mode: u8, count: u32, u32_idx: bool),
528
529    // ── Render state ──────────────────────────────────────────────────────────
530    /// Enable/disable blending. `src`/`dst` are raw GL blend factor enum values.
531    pub set_blend:    unsafe extern "C" fn(enabled: bool, src: u32, dst: u32),
532    /// Enable/disable depth testing and depth writes.
533    pub set_depth:    unsafe extern "C" fn(test: bool, write: bool),
534    /// Enable scissor clipping (GUI-pixel rectangle).
535    pub set_scissor:  unsafe extern "C" fn(x: i32, y: i32, w: i32, h: i32),
536    /// Disable scissor clipping.
537    pub clear_scissor: unsafe extern "C" fn(),
538    /// Set the GL viewport (physical pixel coordinates).
539    pub set_viewport:  unsafe extern "C" fn(x: i32, y: i32, w: i32, h: i32),
540
541    // ── 2D convenience (HUD-render only — uses MC's DrawContext) ─────────────
542    /// Filled rectangle. Only valid during `on_hud_render`.
543    pub draw2d_rect:     unsafe extern "C" fn(x1: f32, y1: f32, x2: f32, y2: f32, color: u32),
544    /// Vertical-gradient rectangle. Only valid during `on_hud_render`.
545    pub draw2d_gradient: unsafe extern "C" fn(x1: f32, y1: f32, x2: f32, y2: f32, top: u32, bottom: u32),
546    /// MC text renderer string. Only valid during `on_hud_render`.
547    pub draw2d_text:     unsafe extern "C" fn(text: YogStr, x: f32, y: f32, color: u32, shadow: bool),
548    /// Blit from a Minecraft-managed texture. Only valid during `on_hud_render`.
549    /// `(u0, v0)` in texels; `(w, h)` in pixels; `(tw, th)` full texture size.
550    pub draw2d_mc_tex:   unsafe extern "C" fn(id: YogStr, x: f32, y: f32, u0: f32, v0: f32, w: f32, h: f32, tw: f32, th: f32),
551
552    // ── appended in ABI minor 21 ──────────────────────────────────────────────
553    /// Render an item stack (3D block models included) via MC's item renderer,
554    /// like Patchouli's `renderItemStack`. `id` is a registry item id
555    /// ("minecraft:crafting_table"); `size` is the on-screen size in GUI px
556    /// (16 = inventory size). Only valid during `on_hud_render`.
557    pub draw2d_item:     unsafe extern "C" fn(id: YogStr, x: f32, y: f32, size: f32),
558}
559
560unsafe impl Send for YogGfxApi {}
561unsafe impl Sync for YogGfxApi {}
562
563// ── Server action table (runtime → mod direction is wrong; it's mod → runtime) ─
564
565/// All Minecraft-mutating calls available inside a handler.
566///
567/// `ctx` is an opaque pointer to the runtime's JNI state.  Every function takes
568/// it as its first argument.  The pointer is valid for the lifetime of the process.
569///
570/// Strings **returned** by functions in this table are heap-allocated by the
571/// runtime and must be freed with `free_str` after the caller has read them.
572#[repr(C)]
573pub struct YogServer {
574    pub ctx:         *mut c_void,
575    pub abi_version: u32,
576    /// `sizeof(YogServer)` at build time — allows mods compiled against an older
577    /// table to detect and skip fields they don't know about.
578    pub size:        u32,
579
580    /// Free a string returned by any function in this table.
581    pub free_str: unsafe extern "C" fn(ptr: *mut u8, len: u32),
582
583    // ── chat ─────────────────────────────────────────────────────────────────
584    pub broadcast: unsafe extern "C" fn(ctx: *mut c_void, msg: YogStr),
585
586    // ── world ────────────────────────────────────────────────────────────────
587    pub get_block:   unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, pos: YogBlockPos) -> YogOwnedStr,
588    pub set_block:   unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, pos: YogBlockPos, block: YogStr) -> bool,
589    pub world_time:  unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, out: *mut i64) -> bool,
590    pub set_time:    unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, time: i64) -> bool,
591    pub is_raining:  unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr) -> bool,
592    pub set_weather: unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, raining: bool, dur: i32) -> bool,
593
594    // ── player ───────────────────────────────────────────────────────────────
595    pub give_item:         unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, item: YogStr, count: u32) -> bool,
596    pub player_teleport:   unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, pos: YogVec3) -> bool,
597    pub send_to_player:    unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, channel: YogStr, data: *const u8, len: u32) -> bool,
598    pub send_to_server:    unsafe extern "C" fn(ctx: *mut c_void, channel: YogStr, data: *const u8, len: u32) -> bool,
599    pub kick_player:       unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, reason: YogStr) -> bool,
600    pub set_gamemode:      unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, mode: YogStr) -> bool,
601    pub send_title:        unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, title: YogStr, sub: YogStr, fi: i32, stay: i32, fo: i32) -> bool,
602    pub send_actionbar:    unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, msg: YogStr) -> bool,
603    pub play_sound:        unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, pos: YogVec3, sound: YogStr, vol: f32, pitch: f32) -> bool,
604    pub play_sound_player: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, sound: YogStr, vol: f32, pitch: f32) -> bool,
605
606    // ── entity ───────────────────────────────────────────────────────────────
607    pub entity_teleport:      unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, pos: YogVec3) -> bool,
608    pub entity_position:      unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, out: *mut YogVec3) -> bool,
609    pub entity_health:        unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, out: *mut f32) -> bool,
610    pub entity_set_health:    unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, hp: f32) -> bool,
611    pub entity_kill:          unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr) -> bool,
612    pub spawn_entity:         unsafe extern "C" fn(ctx: *mut c_void, type_id: YogStr, dim: YogStr, pos: YogVec3) -> YogOwnedStr,
613    pub entity_add_effect:    unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, fx: YogStr, dur: i32, amp: u8, particles: bool) -> bool,
614    pub entity_remove_effect: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, fx: YogStr) -> bool,
615    pub entity_clear_effects: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr) -> bool,
616    pub entity_velocity:      unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, out: *mut YogVec3) -> bool,
617    pub entity_set_velocity:  unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, vel: YogVec3) -> bool,
618    pub entity_add_velocity:  unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, vel: YogVec3) -> bool,
619
620    // ── tags & loot ──────────────────────────────────────────────────────────
621    pub has_item_tag:  unsafe extern "C" fn(ctx: *mut c_void, item: YogStr, tag: YogStr) -> bool,
622    pub has_block_tag: unsafe extern "C" fn(ctx: *mut c_void, block: YogStr, tag: YogStr) -> bool,
623    pub drop_loot:     unsafe extern "C" fn(ctx: *mut c_void, table: YogStr, dim: YogStr, pos: YogVec3) -> bool,
624
625    // ── scoreboard ───────────────────────────────────────────────────────────
626    pub scoreboard_get: unsafe extern "C" fn(ctx: *mut c_void, obj: YogStr, player: YogStr, out: *mut i32) -> bool,
627    pub scoreboard_set: unsafe extern "C" fn(ctx: *mut c_void, obj: YogStr, player: YogStr, score: i32) -> bool,
628    pub scoreboard_add: unsafe extern "C" fn(ctx: *mut c_void, obj: YogStr, player: YogStr, delta: i32, out: *mut i32) -> bool,
629
630    // ── boss bar ─────────────────────────────────────────────────────────────
631    pub bossbar_create:        unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, title: YogStr, color: YogStr, style: YogStr) -> bool,
632    pub bossbar_remove:        unsafe extern "C" fn(ctx: *mut c_void, id: YogStr) -> bool,
633    pub bossbar_set_title:     unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, title: YogStr) -> bool,
634    pub bossbar_set_progress:  unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, progress: f32) -> bool,
635    pub bossbar_set_color:     unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, color: YogStr) -> bool,
636    pub bossbar_add_player:    unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, player: YogStr) -> bool,
637    pub bossbar_remove_player: unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, player: YogStr) -> bool,
638    pub bossbar_set_visible:   unsafe extern "C" fn(ctx: *mut c_void, id: YogStr, visible: bool) -> bool,
639
640    // ── misc ─────────────────────────────────────────────────────────────────
641    pub game_dir: unsafe extern "C" fn(ctx: *mut c_void) -> YogOwnedStr,
642
643    // ── player query (ABI minor 4) ────────────────────────────────────────────
644    /// Newline-separated list of online player names, or NONE if server not up.
645    pub online_players: unsafe extern "C" fn(ctx: *mut c_void) -> YogOwnedStr,
646
647    // ── block entity (NBT, ABI minor 3) ──────────────────────────────────────
648    /// SNBT string of the block entity at `pos`, or NONE if there is none.
649    pub get_block_nbt: unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, pos: YogBlockPos) -> YogOwnedStr,
650    /// Write SNBT into the block entity at `pos`. Returns false if no block entity exists.
651    pub set_block_nbt: unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, pos: YogBlockPos, snbt: YogStr) -> bool,
652
653    // ── inventory (ABI minor 3) ───────────────────────────────────────────────
654    /// Tab/newline-encoded inventory: one line per occupied slot, `slot\titem_id\tcount`.
655    pub player_inventory: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr) -> YogOwnedStr,
656    /// Set (or clear when count==0) a specific inventory slot.
657    pub player_set_slot:  unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, slot: u32, item_id: YogStr, count: u32) -> bool,
658
659    // ── cross-dimension teleport (ABI minor 3) ────────────────────────────────
660    pub player_teleport_dim: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, dim: YogStr, pos: YogVec3) -> bool,
661    pub entity_teleport_dim: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, dim: YogStr, pos: YogVec3) -> bool,
662
663    // ── entity counting ───────────────────────────────────────────────────────
664    /// Count loaded instances of `entity_type` in `dimension`. Returns -1 on error.
665    pub world_entity_count: unsafe extern "C" fn(ctx: *mut c_void, dim: YogStr, entity_type: YogStr) -> i32,
666
667    // ── entity NBT (ABI minor 6) ──────────────────────────────────────────────
668    /// SNBT of the entity's persistent data, or NONE if entity not found.
669    pub entity_get_nbt: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr) -> YogOwnedStr,
670    /// Merge SNBT data into the entity. Returns false if entity not found.
671    pub entity_set_nbt: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, snbt: YogStr) -> bool,
672
673    // ── particles (ABI minor 6) ───────────────────────────────────────────────
674    /// Spawn `count` particles at `pos` in `dim`.
675    /// `dx/dy/dz` control spread, `speed` controls particle speed.
676    /// Returns false if the dimension or particle type is unknown.
677    pub spawn_particles: unsafe extern "C" fn(
678        ctx: *mut c_void,
679        dim: YogStr,
680        pos: YogVec3,
681        particle_type: YogStr,
682        count: i32,
683        dx: f64, dy: f64, dz: f64,
684        speed: f64,
685    ) -> bool,
686
687    // ── attributes (ABI minor 7) ──────────────────────────────────────────────
688    /// Get the base value of an attribute on a living entity.
689    /// `attribute_id` is a registry id, e.g. `"minecraft:generic.max_health"`.
690    /// Returns `f64::NAN` if entity or attribute is not found.
691    pub entity_attribute_get: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, attribute_id: YogStr) -> f64,
692    /// Set the base value of an attribute. Returns false if entity or attribute is not found.
693    pub entity_attribute_set: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, attribute_id: YogStr, value: f64) -> bool,
694
695    // ── held item NBT (ABI minor 11) ─────────────────────────────────────────
696    /// SNBT of the item currently held in the player's main hand.
697    /// Returns NONE if the player is offline or holding air.
698    pub get_held_item_nbt: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr) -> YogOwnedStr,
699    /// Merge `snbt` data into the NBT of the player's held main-hand item in-place.
700    /// Returns false if the player is offline or holding air.
701    pub set_held_item_nbt: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, snbt: YogStr) -> bool,
702
703    // ── item stack query (ABI minor 12) ──────────────────────────────────────
704    /// SNBT of the item in the player's off hand, or NONE if offline / holding air.
705    pub get_offhand_item_nbt: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr) -> YogOwnedStr,
706    /// Merge `snbt` into the NBT of the player's off-hand item.
707    /// Returns false if offline or holding air.
708    pub set_offhand_item_nbt: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, snbt: YogStr) -> bool,
709    /// Full item stack at inventory `slot`: tab-separated `item_id\tcount\tsnbt`.
710    /// `snbt` is `{}` when the item has no NBT. Returns NONE if offline or slot empty.
711    pub get_slot_item: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, slot: u32) -> YogOwnedStr,
712    /// Replace inventory `slot` with an item stack. `snbt` may be empty to clear NBT.
713    /// Pass `count == 0` to clear the slot (ignores `item_id` and `snbt`).
714    pub set_slot_item: unsafe extern "C" fn(ctx: *mut c_void, player: YogStr, slot: u32, item_id: YogStr, count: u32, snbt: YogStr) -> bool,
715
716    // ── entity rotation (ABI minor 25) ───────────────────────────────────────
717    /// Yaw and pitch (degrees) of an entity by UUID. Returns false if the
718    /// entity does not exist. `out` receives x=yaw, y=pitch, z=0.
719    pub entity_rotation: unsafe extern "C" fn(ctx: *mut c_void, uuid: YogStr, out: *mut YogVec3) -> bool,
720}
721
722// ctx = *mut JavaVM which is global/stable. All fn ptrs are pure C-ABI.
723unsafe impl Send for YogServer {}
724unsafe impl Sync for YogServer {}
725
726// ── Registration table (passed to yog_mod_register) ──────────────────────────
727
728/// Passed to `yog_mod_register`. Call the function pointers here to register
729/// handlers, commands, content, and schedulers.
730///
731/// When mods compiled against ABI `N` load on a runtime with ABI `M > N`:
732/// fields beyond `size` are not present in the mod's view — check `size` before
733/// accessing fields added in later minor versions.
734#[repr(C)]
735pub struct YogApi {
736    pub abi_version: u32,
737    /// `sizeof(YogApi)` at the runtime's build time.
738    pub size:        u32,
739    /// Opaque pointer to runtime handler storage.
740    pub ctx:         *mut c_void,
741    /// Stable server action table — pass to handlers.
742    pub server:      *const YogServer,
743
744    // ── events — all handlers receive (ud, srv, event, phase: u8) → bool ────────
745    // phase 0 = Pre (return false to cancel), phase 1 = Post (return ignored).
746    pub on_block_break:       unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogBlockBreakFn),
747    pub on_chat:              unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogChatFn),
748    pub on_player_join:       unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlayerFn),
749    pub on_player_leave:      unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlayerFn),
750    pub on_use_item:          unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogUseItemFn),
751    pub on_use_block:         unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogUseBlockFn),
752    pub on_attack_entity:     unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogAttackEntityFn),
753    pub on_entity_damage:     unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogEntityDamageFn),
754    pub on_entity_death:      unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogEntityDeathFn),
755    pub on_entity_spawn:       unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogEntitySpawnFn),
756    pub on_player_place_block: unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlaceBlockFn),
757    pub on_player_death:       unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlayerDeathFn),
758    pub on_player_respawn:     unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlayerRespawnFn),
759    pub on_advancement:        unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogAdvancementFn),
760    // ── ABI minor 8 ──────────────────────────────────────────────────────────
761    pub on_entity_interact:    unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogEntityInteractFn),
762    pub on_item_craft:         unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogCraftFn),
763    pub on_explosion:          unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogExplosionFn),
764    // ── ABI minor 9 ──────────────────────────────────────────────────────────
765    pub on_item_pickup:        unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogItemPickupFn),
766    pub on_player_move:        unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogPlayerMoveFn),
767    pub on_container_open:     unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogContainerOpenFn),
768    pub on_container_close:    unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogContainerCloseFn),
769    pub on_projectile_hit:     unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogProjectileHitFn),
770    pub on_server_tick:       unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogServerFn),
771    pub on_server_started:    unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogServerFn),
772    pub on_server_stopping:   unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogServerFn),
773
774    // ── networking ───────────────────────────────────────────────────────────
775    pub on_packet:        unsafe extern "C" fn(ctx: *mut c_void, channel: YogStr, ud: *mut c_void, h: YogPacketFn),
776    pub on_client_packet: unsafe extern "C" fn(ctx: *mut c_void, channel: YogStr, ud: *mut c_void, h: YogPacketFn),
777
778    // ── commands ─────────────────────────────────────────────────────────────
779    pub register_command: unsafe extern "C" fn(ctx: *mut c_void, name: YogStr, ud: *mut c_void, h: YogCommandFn),
780    pub register_typed_command: unsafe extern "C" fn(ctx: *mut c_void, name: YogStr, schema: YogStr, ud: *mut c_void, h: YogCommandFn),
781
782    // ── recipes ──────────────────────────────────────────────────────────────
783    /// Register a recipe by supplying Minecraft JSON (`data/` format).
784    /// `namespace` + `name` form the file path: `data/{ns}/recipes/{name}.json`.
785    pub register_recipe_json: unsafe extern "C" fn(ctx: *mut c_void, namespace: YogStr, name: YogStr, json: YogStr),
786
787    // ── content ──────────────────────────────────────────────────────────────
788    pub register_item:  unsafe extern "C" fn(ctx: *mut c_void, def: *const YogItemDef),
789    pub register_block: unsafe extern "C" fn(ctx: *mut c_void, def: *const YogBlockDef),
790
791    // ── scheduler ────────────────────────────────────────────────────────────
792    pub schedule_once:      unsafe extern "C" fn(ctx: *mut c_void, delay_ticks: u64, ud: *mut c_void, h: YogScheduledFn),
793    pub schedule_repeating: unsafe extern "C" fn(ctx: *mut c_void, period_ticks: u64, ud: *mut c_void, h: YogScheduledFn),
794
795    // ── ABI minor 10 — client-side events ────────────────────────────────────
796    pub on_client_tick:  unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogClientFn),
797    pub on_hud_render:   unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogHudRenderFn),
798    pub on_key_press:    unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogKeyPressFn),
799    pub on_screen_open:  unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogScreenFn),
800    pub on_screen_close: unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogScreenFn),
801
802    // ── ABI minor 14 — world render ──────────────────────────────────────────
803    /// Register a handler that fires after world geometry is rendered.
804    /// `gfx.view_proj` and `gfx.camera_pos` are filled; use them to project
805    /// custom 3D geometry into clip space.
806    pub on_world_render: unsafe extern "C" fn(ctx: *mut c_void, ud: *mut c_void, h: YogWorldRenderFn),
807
808    // ── ABI minor 16 — startup grants ────────────────────────────────────────
809    pub register_startup_grant: unsafe extern "C" fn(ctx: *mut c_void, grant: *const YogStartupGrantDef),
810
811    // ── ABI minor 18 — books ─────────────────────────────────────────────────
812    pub register_book: unsafe extern "C" fn(ctx: *mut c_void, book_id: YogStr, book_json: YogStr),
813    
814    // ── ABI minor 19 — UI system ──────────────────────────────────────────────
815    /// Register a UI tree. `ui_id` is the unique identifier (e.g. "mymod:menu").
816    /// `layout_json` is the serialized layout tree.
817    /// `handler` is called when an interactive element is clicked/keyed.
818    pub register_ui: unsafe extern "C" fn(ctx: *mut c_void, ui_id: YogStr, layout_json: YogStr, ud: *mut c_void, h: YogUIEventFn),
819
820    // ── ABI minor 20 — per-UI screen renderer ────────────────────────────────
821    /// Register a render callback that fires during `YogUIScreen.render()` for a
822    /// specific UI id — i.e. AFTER the screen darkening, unlike `on_hud_render`.
823    /// Reuses `YogHudRenderFn` (`fn(ud, gfx)`); `gfx.screen_w/h` are set.
824    /// Clicks are forwarded as `"click:X:Y"` events to the `register_ui` handler
825    /// so mods can do their own hit-testing with their stored layout.
826    pub on_ui_render: unsafe extern "C" fn(ctx: *mut c_void, ui_id: YogStr, ud: *mut c_void, h: YogHudRenderFn),
827
828    // ── ABI minor 22 — menu entry registration ──────────────────────────────
829    /// Register a button/link that the host renders on vanilla screens
830    /// (TitleScreen on Fabric, ModListScreen on Forge/NeoForge).
831    /// `label` is the human-readable button text (e.g. "Yog Mods").
832    /// `ui_id` is the Yog UI to open when clicked (e.g. "yog:modlist").
833    pub register_menu_entry: unsafe extern "C" fn(ctx: *mut c_void, label: YogStr, ui_id: YogStr),
834
835    // ── ABI minor 23 — installed mods listing ───────────────────────────────
836    /// All installed mods as TSV, one per line:
837    /// `source \t id \t name \t version \t authors \t description`
838    /// where `source` is `yog` (a .yog mod) or `platform` (a loader mod, e.g.
839    /// a Fabric/Forge jar). Tabs and newlines inside fields become spaces.
840    /// Callable at any time after registration (also client-side).
841    pub mods_list: unsafe extern "C" fn(ctx: *mut c_void) -> YogOwnedStr,
842    /// Free a `YogOwnedStr` returned by an api-table call (same allocator as
843    /// `YogServer::free_str`).
844    pub free_str: unsafe extern "C" fn(ptr: *mut u8, len: u32),
845
846    // ── ABI minor 24 — open a Yog UI screen ─────────────────────────────────
847    /// Open the Yog UI registered as `ui_id` on the client (schedules onto the
848    /// render thread). Client-side only; a no-op on dedicated servers.
849    /// `modal` blocks game input; `pause` pauses a singleplayer game.
850    pub ui_open: unsafe extern "C" fn(ctx: *mut c_void, ui_id: YogStr, modal: bool, pause: bool),
851}
852
853unsafe impl Send for YogApi {}
854unsafe impl Sync for YogApi {}