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

extern crate vulkano;
extern crate winit;

use std::error;
use std::fmt;
use std::ptr;
use std::sync::Arc;

use vulkano::instance::Instance;
use vulkano::instance::InstanceExtensions;
use vulkano::swapchain::Surface;
use vulkano::swapchain::SurfaceCreationError;
use winit::WindowBuilder;
use winit::CreationError as WindowCreationError;

pub fn required_extensions() -> InstanceExtensions {
    let ideal = InstanceExtensions {
        khr_surface: true,
        khr_xlib_surface: true,
        khr_xcb_surface: true,
        khr_wayland_surface: true,
        khr_mir_surface: true,
        khr_android_surface: true,
        khr_win32_surface: true,
        .. InstanceExtensions::none()
    };

    let supported = InstanceExtensions::supported_by_core();
    supported.intersection(&ideal)
}

pub trait VkSurfaceBuild {
    fn build_vk_surface(self, instance: &Arc<Instance>) -> Result<Window, CreationError>;
}

impl VkSurfaceBuild for WindowBuilder {
    fn build_vk_surface(self, instance: &Arc<Instance>) -> Result<Window, CreationError> {
        let window = try!(self.build());
        let surface = try!(unsafe { winit_to_surface(instance, &window) });

        Ok(Window {
            window: window,
            surface: surface,
        })
    }
}

pub struct Window {
    window: winit::Window,
    surface: Arc<Surface>,
}

impl Window {
    #[inline]
    pub fn window(&self) -> &winit::Window {
        &self.window
    }

    #[inline]
    pub fn surface(&self) -> &Arc<Surface> {
        &self.surface
    }
}

/// Error that can happen when creating a window.
#[derive(Debug)]
pub enum CreationError {
    /// Error when creating the surface.
    SurfaceCreationError(SurfaceCreationError),
    /// Error when creating the window.
    WindowCreationError(WindowCreationError),
}

impl error::Error for CreationError {
    #[inline]
    fn description(&self) -> &str {
        match *self {
            CreationError::SurfaceCreationError(_) => "error while creating the surface",
            CreationError::WindowCreationError(_) => "error while creating the window",
        }
    }

    #[inline]
    fn cause(&self) -> Option<&error::Error> {
        match *self {
            CreationError::SurfaceCreationError(ref err) => Some(err),
            CreationError::WindowCreationError(ref err) => Some(err),
        }
    }
}

impl fmt::Display for CreationError {
    #[inline]
    fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        write!(fmt, "{}", error::Error::description(self))
    }
}

impl From<SurfaceCreationError> for CreationError {
    #[inline]
    fn from(err: SurfaceCreationError) -> CreationError {
        CreationError::SurfaceCreationError(err)
    }
}

impl From<WindowCreationError> for CreationError {
    #[inline]
    fn from(err: WindowCreationError) -> CreationError {
        CreationError::WindowCreationError(err)
    }
}

#[cfg(target_os = "android")]
unsafe fn winit_to_surface(instance: &Arc<Instance>, win: &winit::Window)
                           -> Result<Arc<Surface>, SurfaceCreationError>
{
    use winit::os::android::WindowExt;
    Surface::from_anativewindow(instance, win.get_native_window())
}

#[cfg(all(unix, not(target_os = "android")))]
unsafe fn winit_to_surface(instance: &Arc<Instance>, win: &winit::Window)
                           -> Result<Arc<Surface>, SurfaceCreationError>
{
    use winit::os::unix::WindowExt;
    Surface::from_xlib(instance, win.get_xlib_display().unwrap(),
                       win.get_xlib_window().unwrap())
}

#[cfg(windows)]
unsafe fn winit_to_surface(instance: &Arc<Instance>, win: &winit::Window)
                           -> Result<Arc<Surface>, SurfaceCreationError>
{
    use winit::os::windows::WindowExt;
    Surface::from_hwnd(instance, ptr::null() as *const () /* FIXME */, win.get_hwnd())
}