Implement Window's GL context for Glutin

ports/glutin/context.rs

@@ -2,7 +2,10 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-use glutin::{WindowedContext, NotCurrent, PossiblyCurrent};
+use glutin::os::ContextTraitExt;
+use glutin::{NotCurrent, PossiblyCurrent, WindowedContext};
+use servo_media::player::context::GlContext as RawContext;
+use std::os::raw;
 
 pub enum GlContext {
     Current(WindowedContext<PossiblyCurrent>),
@@ -71,4 +74,59 @@ impl GlContext {
             GlContext::None => unreachable!(),
         };
     }
+    pub fn raw_context(&self) -> RawContext {
+        match self {
+            GlContext::Current(c) => {
+                let raw_handle = unsafe { c.raw_handle() };
+
+                #[cfg(any(
+                    target_os = "linux",
+                    target_os = "dragonfly",
+                    target_os = "freebsd",
+                    target_os = "netbsd",
+                    target_os = "openbsd"
+                ))]
+                {
+                    use glutin::os::unix::RawHandle;
+
+                    return match raw_handle {
+                        RawHandle::Egl(handle) => RawContext::Egl(handle as usize),
+                        RawHandle::Glx(handle) => RawContext::Glx(handle as usize),
+                    };
+                }
+
+                #[cfg(not(any(
+                    target_os = "linux",
+                    target_os = "dragonfly",
+                    target_os = "freebsd",
+                    target_os = "netbsd",
+                    target_os = "openbsd"
+                )))]
+                unimplemented!()
+            }
+            GlContext::NotCurrent(_) => {
+                error!("Context is not current.");
+                RawContext::Unknown
+            }
+            GlContext::None => unreachable!(),
+        }
+    }
+    pub fn egl_display(&self) -> Option<*const raw::c_void> {
+        match self {
+            GlContext::Current(c) => unsafe { c.get_egl_display() },
+            GlContext::NotCurrent(_) => {
+                error!("Context is not current.");
+                None
+            },
+            GlContext::None => unreachable!(),
+        }
+    }
+
+    pub fn get_api(&self) -> glutin::Api {
+        match self {
+            GlContext::Current(c) => c.get_api(),
+            GlContext::NotCurrent(c) => c.get_api(),
+            GlContext::None => unreachable!(),
+        }
+    }
 }

ports/glutin/headed_window.rs

@@ -13,9 +13,9 @@ use gleam::gl;
 use glutin::dpi::{LogicalPosition, LogicalSize, PhysicalSize};
 #[cfg(target_os = "macos")]
 use glutin::os::macos::{ActivationPolicy, WindowBuilderExt};
+use glutin::Api;
 #[cfg(any(target_os = "linux", target_os = "windows"))]
 use glutin::Icon;
-use glutin::Api;
 use glutin::{ElementState, KeyboardInput, MouseButton, MouseScrollDelta, TouchPhase};
 #[cfg(any(target_os = "linux", target_os = "windows"))]
 use image;
@@ -30,7 +30,7 @@ use servo::style_traits::DevicePixel;
 use servo::webrender_api::{
     DeviceIntPoint, DeviceIntRect, DeviceIntSize, FramebufferIntSize, ScrollLocation,
 };
-use servo_media::player::context as MediaPlayerCtxt;
+use servo_media::player::context::{GlApi, GlContext as PlayerGLContext, NativeDisplay};
 use std::cell::{Cell, RefCell};
 use std::mem;
 use std::rc::Rc;
@@ -526,16 +526,68 @@ impl WindowMethods for Window {
         self.gl_context.borrow_mut().make_current();
     }
 
-    fn get_gl_context(&self) -> MediaPlayerCtxt::GlContext {
-        MediaPlayerCtxt::GlContext::Unknown
+    fn get_gl_context(&self) -> PlayerGLContext {
+        self.gl_context.borrow().raw_context()
     }
 
-    fn get_native_display(&self) -> MediaPlayerCtxt::NativeDisplay {
-        MediaPlayerCtxt::NativeDisplay::Unknown
+    fn get_native_display(&self) -> NativeDisplay {
+        #[cfg(any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd",
+            target_os = "openbsd"
+        ))]
+        let native_display = {
+            if let Some(display) = self.gl_context.borrow().egl_display() {
+                NativeDisplay::Egl(display as usize)
+            } else {
+                use glutin::os::unix::WindowExt;
+
+                if let Some(display) = self.gl_context.borrow().window().get_wayland_display() {
+                    NativeDisplay::Wayland(display as usize)
+                } else if let Some(display) = self.gl_context.borrow().window().get_xlib_display() {
+                    NativeDisplay::X11(display as usize)
+                } else {
+                    NativeDisplay::Unknown
+                }
+            }
+        };
+
+        #[cfg(not(any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd",
+            target_os = "openbsd"
+        )))]
+        let native_display = NativeDisplay::Unknown;
+
+        native_display
     }
 
-    fn get_gl_api(&self) -> MediaPlayerCtxt::GlApi {
-        MediaPlayerCtxt::GlApi::None
+    fn get_gl_api(&self) -> GlApi {
+        let api = self.gl_context.borrow().get_api();
+
+        let version = self.gl.get_string(gl::VERSION);
+        let version = version.trim_start_matches("OpenGL ES ");
+        let mut values = version.split(&['.', ' '][..]);
+        let major = values
+            .next()
+            .and_then(|v| v.parse::<u32>().ok())
+            .unwrap_or(1);
+        let minor = values
+            .next()
+            .and_then(|v| v.parse::<u32>().ok())
+            .unwrap_or(20);
+
+        match api {
+            glutin::Api::OpenGl if major >= 3 && minor >= 2 => GlApi::OpenGL3,
+            glutin::Api::OpenGl => GlApi::OpenGL,
+            glutin::Api::OpenGlEs if major > 1 => GlApi::Gles2,
+            glutin::Api::OpenGlEs => GlApi::Gles1,
+            _ => GlApi::None,
+        }
     }
 }