gate 0.6.3

A specialized 2D game library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

// Copyright 2017-2019 Matthew D. Michelotti
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! This module contains methods exported to the gate javascript code for WebAssembly.
//! DO NOT USE DIRECTLY!

#![allow(non_snake_case)]

use std::os::raw::{c_int, c_char, c_void};

use crate::input::KeyCode;
use crate::renderer::shaders;
use super::{app_runner_is_defined, app_runner_borrow, app_runner_borrow_mut };

pub fn gateWasmInit() {
    app_runner_borrow_mut().init();
}

pub fn gateWasmOnResize(w: c_int, h: c_int) {
    app_runner_borrow_mut().resize((w as u32, h as u32));
}

pub fn gateWasmUpdateAndDraw(time_millis: f64, cursor_x: c_int, cursor_y: c_int) -> c_int {
    app_runner_borrow_mut().update_cursor(cursor_x as i32, cursor_y as i32);
    let continuing = app_runner_borrow_mut().update_and_draw(time_millis / 1000.0);
    if continuing { 1 } else { 0 }
}

pub fn gateWasmKeyEvent(code: c_int, down: bool) -> c_int {
    assert!(code >= 0 && code <= 255);
    let code = KeyCode::from_u8(code as u8).unwrap();
    let continuing = app_runner_borrow_mut().input(code, down);
    if continuing { 1 } else { 0 }
}

pub fn gateWasmMouseEvent(cursor_x: c_int, cursor_y: c_int, button: c_int, down: bool) -> c_int {
    app_runner_borrow_mut().update_cursor(cursor_x as i32, cursor_y as i32);
    let code = match button {
        0 => Some(KeyCode::MouseLeft),
        1 => Some(KeyCode::MouseMiddle),
        2 => Some(KeyCode::MouseRight),
        _ => None,
    };
    let continuing = if let Some(code) = code {
        app_runner_borrow_mut().input(code, down)
    } else {
        true
    };
    if continuing { 1 } else { 0 }
}

pub fn gateWasmIsAppDefined() -> c_int {
    if app_runner_is_defined() { 1 } else { 0 }
}

pub fn gateWasmMusicCount() -> c_int {
    app_runner_borrow().music_count() as c_int
}

pub fn gateWasmSoundCount() -> c_int {
    app_runner_borrow().sound_count() as c_int
}

pub fn gateWasmSpriteVertSrc() -> *const c_char {
    shaders::VS_SPRITE_SRC
}

pub fn gateWasmSpriteFragSrc() -> *const c_char {
    shaders::FS_SPRITE_SRC
}

pub fn gateWasmOnRestart() {
    app_runner_borrow_mut().on_restart();
}

pub fn gateWasmCookieDataPtr(size: usize) -> *mut c_void {
    app_runner_borrow_mut().cookie_buffer(size).as_mut_ptr() as *mut c_void
}

/// Macro to be placed in the `main.rs` file for a Gate app.
///
/// Currently, the only use this macro has is to export WASM functions for the app
/// when compiling to the `wasm32-unknown-unknown` target.
#[macro_export]
macro_rules! gate_header {
    () => {
        pub mod gate_wasm_exports {
            use std::os::raw::{c_int, c_char, c_void};
            #[no_mangle] pub unsafe extern "C" fn gateWasmInit() {
                ::gate::wasm_exports::gateWasmInit()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmOnResize(w: c_int, h: c_int) {
                ::gate::wasm_exports::gateWasmOnResize(w, h)
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmUpdateAndDraw(time_millis: f64, cursor_x: c_int, cursor_y: c_int) -> c_int {
                ::gate::wasm_exports::gateWasmUpdateAndDraw(time_millis, cursor_x, cursor_y)
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmKeyEvent(code: c_int, down: bool) -> c_int {
                ::gate::wasm_exports::gateWasmKeyEvent(code, down)
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmMouseEvent(cursor_x: c_int, cursor_y: c_int, button: c_int, down: bool) -> c_int {
                ::gate::wasm_exports::gateWasmMouseEvent(cursor_x, cursor_y, button, down)
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmIsAppDefined() -> c_int {
                ::gate::wasm_exports::gateWasmIsAppDefined()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmMusicCount() -> c_int {
                ::gate::wasm_exports::gateWasmMusicCount()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmSoundCount() -> c_int {
                ::gate::wasm_exports::gateWasmSoundCount()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmSpriteVertSrc() -> *const c_char {
                ::gate::wasm_exports::gateWasmSpriteVertSrc()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmSpriteFragSrc() -> *const c_char {
                ::gate::wasm_exports::gateWasmSpriteFragSrc()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmOnRestart() {
                ::gate::wasm_exports::gateWasmOnRestart()
            }
            #[no_mangle] pub unsafe extern "C" fn gateWasmCookieDataPtr(size: usize) -> *mut c_void {
                ::gate::wasm_exports::gateWasmCookieDataPtr(size)
            }
        }
    };
}