2019-03-08 19:52:47 -05:00
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// pathfinder/demo/android/rust/src/main.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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2019-03-13 19:32:39 -04:00
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#[macro_use]
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extern crate lazy_static;
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2019-03-08 19:52:47 -05:00
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use jni::{JNIEnv, JavaVM};
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use jni::objects::{GlobalRef, JByteBuffer, JClass, JObject, JValue};
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use pathfinder_demo::DemoApp;
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2019-03-14 22:13:27 -04:00
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use pathfinder_demo::window::{Event, Window, WindowSize};
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use pathfinder_geometry::basic::point::Point2DI32;
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use pathfinder_gl::GLVersion;
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use pathfinder_gpu::resources::ResourceLoader;
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use std::cell::RefCell;
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use std::io::Error as IOError;
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use std::mem;
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use std::os::raw::c_void;
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use std::path::PathBuf;
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2019-03-13 19:32:39 -04:00
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use std::sync::Mutex;
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lazy_static! {
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static ref EVENT_QUEUE: Mutex<Vec<Event>> = Mutex::new(vec![]);
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}
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thread_local! {
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static DEMO_APP: RefCell<Option<DemoApp<WindowImpl>>> = RefCell::new(None);
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static JAVA_RESOURCE_LOADER: RefCell<Option<JavaResourceLoader>> = RefCell::new(None);
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}
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static RESOURCE_LOADER: AndroidResourceLoader = AndroidResourceLoader;
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_init(env: JNIEnv,
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class: JClass,
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loader: JObject,
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width: i32,
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height: i32) {
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let logical_size = Point2DI32::new(width, height);
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let window_size = WindowSize { logical_size, backing_scale_factor: 1.0 };
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JAVA_RESOURCE_LOADER.with(|java_resource_loader| {
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*java_resource_loader.borrow_mut() = Some(JavaResourceLoader::new(env, loader));
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});
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DEMO_APP.with(|demo_app| {
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gl::load_with(|name| egl::get_proc_address(name) as *const c_void);
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*demo_app.borrow_mut() = Some(DemoApp::new(WindowImpl, window_size));
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});
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}
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_runOnce(env: JNIEnv,
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class: JClass) {
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DEMO_APP.with(|demo_app| {
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let mut event_queue = EVENT_QUEUE.lock().unwrap();
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if let Some(ref mut demo_app) = *demo_app.borrow_mut() {
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demo_app.run_once(mem::replace(&mut *event_queue, vec![]));
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}
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});
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}
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2019-03-14 22:13:27 -04:00
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_pushWindowResizedEvent(
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env: JNIEnv,
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class: JClass,
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width: i32,
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height: i32) {
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EVENT_QUEUE.lock().unwrap().push(Event::WindowResized(WindowSize {
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logical_size: Point2DI32::new(width, height),
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backing_scale_factor: 1.0,
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}))
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}
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2019-03-08 19:52:47 -05:00
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_pushMouseDownEvent(
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_: JNIEnv,
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_: JClass,
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x: i32,
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y: i32) {
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EVENT_QUEUE.lock().unwrap().push(Event::MouseDown(Point2DI32::new(x, y)))
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}
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_pushMouseDraggedEvent(
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_: JNIEnv,
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_: JClass,
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x: i32,
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y: i32) {
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EVENT_QUEUE.lock().unwrap().push(Event::MouseDragged(Point2DI32::new(x, y)))
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}
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2019-03-14 18:29:56 -04:00
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#[no_mangle]
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pub unsafe extern "system" fn
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Java_graphics_pathfinder_pathfinderdemo_PathfinderDemoRenderer_pushLookEvent(
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_: JNIEnv,
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_: JClass,
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pitch: f32,
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yaw: f32) {
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EVENT_QUEUE.lock().unwrap().push(Event::Look { pitch, yaw })
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}
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2019-03-08 19:52:47 -05:00
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struct WindowImpl;
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impl Window for WindowImpl {
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fn gl_version(&self) -> GLVersion {
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GLVersion::GLES3
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}
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fn mouse_position(&self) -> Point2DI32 {
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Point2DI32::new(0, 0)
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}
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fn present(&self) {}
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fn resource_loader(&self) -> &dyn ResourceLoader {
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&RESOURCE_LOADER
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}
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fn create_user_event_id(&self) -> u32 {
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0
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}
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fn push_user_event(message_type: u32, message_data: u32) {
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}
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fn run_open_dialog(&self, extension: &str) -> Result<PathBuf, ()> {
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// TODO(pcwalton)
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Err(())
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}
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fn run_save_dialog(&self, extension: &str) -> Result<PathBuf, ()> {
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// TODO(pcwalton)
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Err(())
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}
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}
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struct AndroidResourceLoader;
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impl ResourceLoader for AndroidResourceLoader {
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fn slurp(&self, path: &str) -> Result<Vec<u8>, IOError> {
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JAVA_RESOURCE_LOADER.with(|java_resource_loader| {
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let java_resource_loader = java_resource_loader.borrow();
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let java_resource_loader = java_resource_loader.as_ref().unwrap();
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let loader = java_resource_loader.loader.as_obj();
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let env = java_resource_loader.vm.get_env().unwrap();
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match env.call_method(loader,
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"slurp",
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"(Ljava/lang/String;)Ljava/nio/ByteBuffer;",
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&[JValue::Object(*env.new_string(path).unwrap())]).unwrap() {
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JValue::Object(object) => {
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let byte_buffer = JByteBuffer::from(object);
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Ok(Vec::from(env.get_direct_buffer_address(byte_buffer).unwrap()))
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}
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_ => panic!("Unexpected return value!"),
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}
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})
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}
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}
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struct JavaResourceLoader {
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loader: GlobalRef,
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vm: JavaVM,
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}
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impl JavaResourceLoader {
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fn new(env: JNIEnv, loader: JObject) -> JavaResourceLoader {
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JavaResourceLoader {
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loader: env.new_global_ref(loader).unwrap(),
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vm: env.get_java_vm().unwrap(),
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}
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}
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}
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