Create reorganization

2 files changed, 535 insertions, 0 deletions

diff --git a/src/api/android/ffi.rs b/src/api/android/ffi.rs
new file mode 100644
index 0000000..111f670
--- /dev/null
+++ b/src/api/android/ffi.rs
@@ -0,0 +1,130 @@
+#![allow(dead_code)]
+#![allow(non_snake_case)]
+#![allow(non_camel_case_types)]
+#![allow(non_upper_case_globals)]
+
+use libc;
+
+pub mod egl {
+    pub type khronos_utime_nanoseconds_t = super::khronos_utime_nanoseconds_t;
+    pub type khronos_uint64_t = super::khronos_uint64_t;
+    pub type khronos_ssize_t = super::khronos_ssize_t;
+    pub type EGLNativeDisplayType = super::EGLNativeDisplayType;
+    pub type EGLNativePixmapType = super::EGLNativePixmapType;
+    pub type EGLNativeWindowType = super::EGLNativeWindowType;
+    pub type EGLint = super::EGLint;
+    pub type NativeDisplayType = super::EGLNativeDisplayType;
+    pub type NativePixmapType = super::EGLNativePixmapType;
+    pub type NativeWindowType = super::EGLNativeWindowType;
+
+    include!(concat!(env!("OUT_DIR"), "/egl_bindings.rs"));
+}
+
+pub type khronos_utime_nanoseconds_t = khronos_uint64_t;
+pub type khronos_uint64_t = libc::uint64_t;
+pub type khronos_ssize_t = libc::c_long;
+pub type EGLint = libc::int32_t;
+pub type EGLNativeDisplayType = *const libc::c_void;
+pub type EGLNativePixmapType = *const libc::c_void;     // FIXME: egl_native_pixmap_t instead
+pub type EGLNativeWindowType = *const ANativeWindow;
+
+#[link(name = "android")]
+#[link(name = "EGL")]
+#[link(name = "GLESv2")]
+extern {}
+
+/**
+ * asset_manager.h
+ */
+pub type AAssetManager = ();
+
+/**
+ * native_window.h
+ */
+pub type ANativeWindow = ();
+
+extern {
+    pub fn ANativeWindow_getHeight(window: *const ANativeWindow) -> libc::int32_t;
+    pub fn ANativeWindow_getWidth(window: *const ANativeWindow) -> libc::int32_t;
+}
+
+/**
+ * native_activity.h
+ */
+pub type JavaVM = ();
+pub type JNIEnv = ();
+pub type jobject = *const libc::c_void;
+
+pub type AInputQueue = ();  // FIXME: wrong
+pub type ARect = ();  // FIXME: wrong
+
+#[repr(C)]
+pub struct ANativeActivity {
+    pub callbacks: *mut ANativeActivityCallbacks,
+    pub vm: *mut JavaVM,
+    pub env: *mut JNIEnv,
+    pub clazz: jobject,
+    pub internalDataPath: *const libc::c_char,
+    pub externalDataPath: *const libc::c_char,
+    pub sdkVersion: libc::int32_t,
+    pub instance: *mut libc::c_void,
+    pub assetManager: *mut AAssetManager,
+    pub obbPath: *const libc::c_char,
+}
+
+#[repr(C)]
+pub struct ANativeActivityCallbacks {
+    pub onStart: extern fn(*mut ANativeActivity),
+    pub onResume: extern fn(*mut ANativeActivity),
+    pub onSaveInstanceState: extern fn(*mut ANativeActivity, *mut libc::size_t),
+    pub onPause: extern fn(*mut ANativeActivity),
+    pub onStop: extern fn(*mut ANativeActivity),
+    pub onDestroy: extern fn(*mut ANativeActivity),
+    pub onWindowFocusChanged: extern fn(*mut ANativeActivity, libc::c_int),
+    pub onNativeWindowCreated: extern fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowResized: extern fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowRedrawNeeded: extern fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowDestroyed: extern fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onInputQueueCreated: extern fn(*mut ANativeActivity, *mut AInputQueue),
+    pub onInputQueueDestroyed: extern fn(*mut ANativeActivity, *mut AInputQueue),
+    pub onContentRectChanged: extern fn(*mut ANativeActivity, *const ARect),
+    pub onConfigurationChanged: extern fn(*mut ANativeActivity),
+    pub onLowMemory: extern fn(*mut ANativeActivity),
+}
+
+/**
+ * looper.h
+ */
+pub type ALooper = ();
+
+#[link(name = "android")]
+extern {
+    pub fn ALooper_forThread() -> *const ALooper;
+    pub fn ALooper_acquire(looper: *const ALooper);
+    pub fn ALooper_release(looper: *const ALooper);
+    pub fn ALooper_prepare(opts: libc::c_int) -> *const ALooper;
+    pub fn ALooper_pollOnce(timeoutMillis: libc::c_int, outFd: *mut libc::c_int,
+        outEvents: *mut libc::c_int, outData: *mut *mut libc::c_void) -> libc::c_int;
+    pub fn ALooper_pollAll(timeoutMillis: libc::c_int, outFd: *mut libc::c_int,
+        outEvents: *mut libc::c_int, outData: *mut *mut libc::c_void) -> libc::c_int;
+    pub fn ALooper_wake(looper: *const ALooper);
+    pub fn ALooper_addFd(looper: *const ALooper, fd: libc::c_int, ident: libc::c_int,
+        events: libc::c_int, callback: ALooper_callbackFunc, data: *mut libc::c_void)
+        -> libc::c_int;
+    pub fn ALooper_removeFd(looper: *const ALooper, fd: libc::c_int) -> libc::c_int;
+}
+
+pub const ALOOPER_PREPARE_ALLOW_NON_CALLBACKS: libc::c_int = 1 << 0;
+
+pub const ALOOPER_POLL_WAKE: libc::c_int = -1;
+pub const ALOOPER_POLL_CALLBACK: libc::c_int = -2;
+pub const ALOOPER_POLL_TIMEOUT: libc::c_int = -3;
+pub const ALOOPER_POLL_ERROR: libc::c_int = -4;
+
+pub const ALOOPER_EVENT_INPUT: libc::c_int = 1 << 0;
+pub const ALOOPER_EVENT_OUTPUT: libc::c_int = 1 << 1;
+pub const ALOOPER_EVENT_ERROR: libc::c_int = 1 << 2;
+pub const ALOOPER_EVENT_HANGUP: libc::c_int = 1 << 3;
+pub const ALOOPER_EVENT_INVALID: libc::c_int = 1 << 4;
+
+pub type ALooper_callbackFunc = extern fn(libc::c_int, libc::c_int, *mut libc::c_void) -> libc::c_int;
diff --git a/src/api/android/mod.rs b/src/api/android/mod.rs
new file mode 100644
index 0000000..c769fc8
--- /dev/null
+++ b/src/api/android/mod.rs
@@ -0,0 +1,405 @@
+#![cfg(target_os = "android")]
+
+extern crate android_glue;
+
+use libc;
+use std::ffi::{CString};
+use std::sync::mpsc::{Receiver, channel};
+use {CreationError, Event, MouseCursor};
+use CreationError::OsError;
+use events::ElementState::{Pressed, Released};
+use events::Event::{MouseInput, MouseMoved};
+use events::MouseButton;
+
+use std::collections::VecDeque;
+
+use Api;
+use BuilderAttribs;
+use CursorState;
+use GlRequest;
+use PixelFormat;
+use native_monitor::NativeMonitorId;
+
+pub struct Window {
+    display: ffi::egl::types::EGLDisplay,
+    context: ffi::egl::types::EGLContext,
+    surface: ffi::egl::types::EGLSurface,
+    event_rx: Receiver<android_glue::Event>,
+}
+
+pub struct MonitorID;
+
+mod ffi;
+
+pub fn get_available_monitors() -> VecDeque <MonitorID> {
+    let mut rb = VecDeque::new();
+    rb.push_back(MonitorID);
+    rb
+}
+
+pub fn get_primary_monitor() -> MonitorID {
+    MonitorID
+}
+
+impl MonitorID {
+    pub fn get_name(&self) -> Option<String> {
+        Some("Primary".to_string())
+    }
+
+    pub fn get_native_identifier(&self) -> NativeMonitorId {
+        NativeMonitorId::Unavailable
+    }
+
+    pub fn get_dimensions(&self) -> (u32, u32) {
+        unimplemented!()
+    }
+}
+
+#[cfg(feature = "headless")]
+pub struct HeadlessContext(i32);
+
+#[cfg(feature = "headless")]
+impl HeadlessContext {
+    /// See the docs in the crate root file.
+    pub fn new(_builder: BuilderAttribs) -> Result<HeadlessContext, CreationError> {
+        unimplemented!()
+    }
+
+    /// See the docs in the crate root file.
+    pub unsafe fn make_current(&self) {
+        unimplemented!()
+    }
+
+    /// See the docs in the crate root file.
+    pub fn is_current(&self) -> bool {
+        unimplemented!()
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_proc_address(&self, _addr: &str) -> *const () {
+        unimplemented!()
+    }
+
+    pub fn get_api(&self) -> ::Api {
+        ::Api::OpenGlEs
+    }
+}
+
+#[cfg(feature = "headless")]
+unsafe impl Send for HeadlessContext {}
+#[cfg(feature = "headless")]
+unsafe impl Sync for HeadlessContext {}
+
+pub struct PollEventsIterator<'a> {
+    window: &'a Window,
+}
+
+impl<'a> Iterator for PollEventsIterator<'a> {
+    type Item = Event;
+
+    fn next(&mut self) -> Option<Event> {
+        match self.window.event_rx.try_recv() {
+            Ok(event) => {
+                match event {
+                    android_glue::Event::EventDown => Some(MouseInput(Pressed, MouseButton::Left)),
+                    android_glue::Event::EventUp => Some(MouseInput(Released, MouseButton::Left)),
+                    android_glue::Event::EventMove(x, y) => Some(MouseMoved((x as i32, y as i32))),
+                    _ => None,
+                }
+            }
+            Err(_) => {
+                None
+            }
+        }
+    }
+}
+
+pub struct WaitEventsIterator<'a> {
+    window: &'a Window,
+}
+
+impl<'a> Iterator for WaitEventsIterator<'a> {
+    type Item = Event;
+
+    fn next(&mut self) -> Option<Event> {
+        loop {
+            // calling poll_events()
+            if let Some(ev) = self.window.poll_events().next() {
+                return Some(ev);
+            }
+
+            // TODO: Implement a proper way of sleeping on the event queue
+            // timer::sleep(Duration::milliseconds(16));
+        }
+    }
+}
+
+impl Window {
+    pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> {
+        use std::{mem, ptr};
+
+        if builder.sharing.is_some() {
+            unimplemented!()
+        }
+
+        let native_window = unsafe { android_glue::get_native_window() };
+        if native_window.is_null() {
+            return Err(OsError(format!("Android's native window is null")));
+        }
+
+        let display = unsafe {
+            let display = ffi::egl::GetDisplay(mem::transmute(ffi::egl::DEFAULT_DISPLAY));
+            if display.is_null() {
+                return Err(OsError("No EGL display connection available".to_string()));
+            }
+            display
+        };
+
+        android_glue::write_log("eglGetDisplay succeeded");
+
+        let (_major, _minor) = unsafe {
+            let mut major: ffi::egl::types::EGLint = mem::uninitialized();
+            let mut minor: ffi::egl::types::EGLint = mem::uninitialized();
+
+            if ffi::egl::Initialize(display, &mut major, &mut minor) == 0 {
+                return Err(OsError(format!("eglInitialize failed")))
+            }
+
+            (major, minor)
+        };
+
+        android_glue::write_log("eglInitialize succeeded");
+
+        let use_gles2 = match builder.gl_version {
+            GlRequest::Specific(Api::OpenGlEs, (2, _)) => true,
+            GlRequest::Specific(Api::OpenGlEs, _) => false,
+            GlRequest::Specific(_, _) => panic!("Only OpenGL ES is supported"),     // FIXME: return a result
+            GlRequest::GlThenGles { opengles_version: (2, _), .. } => true,
+            _ => false,
+        };
+
+        let mut attribute_list = vec!();
+
+        if use_gles2 {
+            attribute_list.push(ffi::egl::RENDERABLE_TYPE as i32);
+            attribute_list.push(ffi::egl::OPENGL_ES2_BIT as i32);
+        }
+
+        {
+            let (red, green, blue) = match builder.color_bits.unwrap_or(24) {
+                24 => (8, 8, 8),
+                16 => (6, 5, 6),
+                _ => panic!("Bad color_bits"),
+            };
+            attribute_list.push(ffi::egl::RED_SIZE as i32);
+            attribute_list.push(red);
+            attribute_list.push(ffi::egl::GREEN_SIZE as i32);
+            attribute_list.push(green);
+            attribute_list.push(ffi::egl::BLUE_SIZE as i32);
+            attribute_list.push(blue);
+        }
+
+        attribute_list.push(ffi::egl::DEPTH_SIZE as i32);
+        attribute_list.push(builder.depth_bits.unwrap_or(8) as i32);
+
+        attribute_list.push(ffi::egl::NONE as i32);
+
+        let config = unsafe {
+            let mut num_config: ffi::egl::types::EGLint = mem::uninitialized();
+            let mut config: ffi::egl::types::EGLConfig = mem::uninitialized();
+            if ffi::egl::ChooseConfig(display, attribute_list.as_ptr(), &mut config, 1,
+                &mut num_config) == 0
+            {
+                return Err(OsError(format!("eglChooseConfig failed")))
+            }
+
+            if num_config <= 0 {
+                return Err(OsError(format!("eglChooseConfig returned no available config")))
+            }
+
+            config
+        };
+
+        android_glue::write_log("eglChooseConfig succeeded");
+
+        let context = unsafe {
+            let mut context_attributes = vec!();
+            if use_gles2 {
+                context_attributes.push(ffi::egl::CONTEXT_CLIENT_VERSION as i32);
+                context_attributes.push(2);
+            }
+            context_attributes.push(ffi::egl::NONE as i32);
+
+            let context = ffi::egl::CreateContext(display, config, ptr::null(),
+                                                  context_attributes.as_ptr());
+            if context.is_null() {
+                return Err(OsError(format!("eglCreateContext failed")))
+            }
+            context
+        };
+
+        android_glue::write_log("eglCreateContext succeeded");
+
+        let surface = unsafe {
+            let surface = ffi::egl::CreateWindowSurface(display, config, native_window, ptr::null());
+            if surface.is_null() {
+                return Err(OsError(format!("eglCreateWindowSurface failed")))
+            }
+            surface
+        };
+
+        android_glue::write_log("eglCreateWindowSurface succeeded");
+
+        let (tx, rx) = channel();
+        android_glue::add_sender(tx);
+
+        Ok(Window {
+            display: display,
+            context: context,
+            surface: surface,
+            event_rx: rx,
+        })
+    }
+
+    pub fn is_closed(&self) -> bool {
+        false
+    }
+
+    pub fn set_title(&self, _: &str) {
+    }
+
+    pub fn show(&self) {
+    }
+
+    pub fn hide(&self) {
+    }
+
+    pub fn get_position(&self) -> Option<(i32, i32)> {
+        None
+    }
+
+    pub fn set_position(&self, _x: i32, _y: i32) {
+    }
+
+    pub fn get_inner_size(&self) -> Option<(u32, u32)> {
+        let native_window = unsafe { android_glue::get_native_window() };
+
+        if native_window.is_null() {
+            None
+        } else {
+            Some((
+                unsafe { ffi::ANativeWindow_getWidth(native_window) } as u32,
+                unsafe { ffi::ANativeWindow_getHeight(native_window) } as u32
+            ))
+        }
+    }
+
+    pub fn get_outer_size(&self) -> Option<(u32, u32)> {
+        self.get_inner_size()
+    }
+
+    pub fn set_inner_size(&self, _x: u32, _y: u32) {
+    }
+
+    pub fn create_window_proxy(&self) -> WindowProxy {
+        WindowProxy
+    }
+
+    pub fn poll_events(&self) -> PollEventsIterator {
+        PollEventsIterator {
+            window: self
+        }
+    }
+
+    pub fn wait_events(&self) -> WaitEventsIterator {
+        WaitEventsIterator {
+            window: self
+        }
+    }
+
+    pub fn make_current(&self) {
+        unsafe {
+            ffi::egl::MakeCurrent(self.display, self.surface, self.surface, self.context);
+        }
+    }
+
+    pub fn is_current(&self) -> bool {
+        unsafe { ffi::egl::GetCurrentContext() == self.context }
+    }
+
+    pub fn get_proc_address(&self, addr: &str) -> *const () {
+        let addr = CString::new(addr.as_bytes()).unwrap();
+        let addr = addr.as_ptr();
+        unsafe {
+            ffi::egl::GetProcAddress(addr) as *const ()
+        }
+    }
+
+    pub fn swap_buffers(&self) {
+        unsafe {
+            ffi::egl::SwapBuffers(self.display, self.surface);
+        }
+    }
+
+    pub fn platform_display(&self) -> *mut libc::c_void {
+        self.display as *mut libc::c_void
+    }
+
+    pub fn platform_window(&self) -> *mut libc::c_void {
+        unimplemented!()
+    }
+
+    pub fn get_api(&self) -> ::Api {
+        ::Api::OpenGlEs
+    }
+
+    pub fn get_pixel_format(&self) -> PixelFormat {
+        unimplemented!();
+    }
+
+    pub fn set_window_resize_callback(&mut self, _: Option<fn(u32, u32)>) {
+    }
+
+    pub fn set_cursor(&self, _: MouseCursor) {
+    }
+
+    pub fn set_cursor_state(&self, state: CursorState) -> Result<(), String> {
+        Ok(())
+    }
+
+    pub fn hidpi_factor(&self) -> f32 {
+        1.0
+    }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        unimplemented!();
+    }
+}
+
+unsafe impl Send for Window {}
+unsafe impl Sync for Window {}
+
+#[cfg(feature = "window")]
+#[derive(Clone)]
+pub struct WindowProxy;
+
+impl WindowProxy {
+    pub fn wakeup_event_loop(&self) {
+        unimplemented!()
+    }
+}
+
+impl Drop for Window {
+    fn drop(&mut self) {
+        use std::ptr;
+
+        unsafe {
+            // we don't call MakeCurrent(0, 0) because we are not sure that the context
+            // is still the current one
+            android_glue::write_log("Destroying gl-init window");
+            ffi::egl::DestroySurface(self.display, self.surface);
+            ffi::egl::DestroyContext(self.display, self.context);
+            ffi::egl::Terminate(self.display);
+        }
+    }
+}