Struct glutin::GlWindow

source · 
pub struct GlWindow { /* private fields */ }
Expand description

Represents an OpenGL context and a Window with which it is associated.

Example

let mut events_loop = glutin::EventsLoop::new();
let window = glutin::WindowBuilder::new();
let context = glutin::ContextBuilder::new();
let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

unsafe { gl_window.make_current().unwrap() };

loop {
    events_loop.poll_events(|event| {
        match event {
            // process events here
            _ => ()
        }
    });

    // draw everything here

    gl_window.swap_buffers();
    std::thread::sleep(std::time::Duration::from_millis(17));
}

Implementations§

source§

impl GlWindow

source

pub fn new( window_builder: WindowBuilder, context_builder: ContextBuilder<'_>, events_loop: &EventsLoop ) -> Result<Self, CreationError>

Builds the given window along with the associated GL context, returning the pair as a GlWindow.

The context made can be shared with:

  • headless contexts made with the shareable_with_windowed_contexts flag set to true; and
  • contexts made when creating a GlWindow.

You are not guaranteed to receive an error if you share a context with an other context which you’re not permitted to share it with, as according to:

  • the restrictions stated by us above; and
  • the restrictions imposed on you by the platform your application runs on. (Please refer to README-SHARING.md)

Failing to follow all the context sharing restrictions imposed on you may result in unsafe behavior.

This safe variant of new_shared will panic if you try to share it with an existing context.

Error should be very rare and only occur in case of permission denied, incompatible system out of memory, etc.

Examples found in repository?
examples/window.rs (line 11)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new().with_title("A fantastic window!");
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
More examples
Hide additional examples
examples/transparent.rs (line 14)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("A transparent window!")
        .with_decorations(false)
        .with_transparency(true);
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input: glutin::KeyboardInput {
                        virtual_keycode: Some(glutin::VirtualKeyCode::Escape),
                        ..
                    }, .. } => running = false,
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([0.0; 4]);
        let _ = gl_window.swap_buffers();
    }
}
examples/multiwindow.rs (line 15)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    let mut windows = std::collections::HashMap::new();
    for index in 0..3 {
        let title = format!("Charming Window #{}", index + 1);
        let window = glutin::WindowBuilder::new().with_title(title);
        let context = glutin::ContextBuilder::new();
        let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();
        let _ = unsafe { gl_window.make_current() };
        let gl = support::load(&gl_window.context());
        let window_id = gl_window.id();
        windows.insert(window_id, (gl_window, gl));
    }

    while !windows.is_empty() {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, window_id } => match event {
                    glutin::WindowEvent::Resized(logical_size) => {
                        let gl_window = &windows[&window_id].0;
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::CloseRequested => {
                        if windows.remove(&window_id).is_some() {
                            println!("Window with ID {:?} has been closed", window_id);
                        }
                    },
                    _ => (),
                },
                _ => (),
            }
        });

        for (index, window) in windows.values().enumerate() {
            let mut color = [1.0, 0.5, 0.7, 1.0];
            color.swap(0, index % 3);
            let _ = unsafe { window.0.make_current() };
            window.1.draw_frame(color);
            let _ = window.0.swap_buffers();
        }
    }
}
examples/fullscreen.rs (line 34)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    // enumerating monitors
    let monitor = {
        for (num, monitor) in events_loop.get_available_monitors().enumerate() {
            println!("Monitor #{}: {:?}", num, monitor.get_name());
        }

        print!("Please write the number of the monitor to use: ");
        io::stdout().flush().unwrap();

        let mut num = String::new();
        io::stdin().read_line(&mut num).unwrap();
        let num = num.trim().parse().ok().expect("Please enter a number");
        let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");

        println!("Using {:?}", monitor.get_name());

        monitor
    };

    let window = glutin::WindowBuilder::new()
        .with_title("Hello world!")
        .with_fullscreen(Some(monitor));
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    let gl = support::load(&gl_window.context());

    let mut fullscreen = true;
    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input, .. } => {
                        match input.virtual_keycode {
                            Some(glutin::VirtualKeyCode::Escape) => running = false,
                            Some(glutin::VirtualKeyCode::F) if input.state == glutin::ElementState::Pressed => {
                                let monitor = if fullscreen {
                                    None
                                } else {
                                    Some(gl_window.get_current_monitor())
                                };
                                gl_window.set_fullscreen(monitor);
                                fullscreen = !fullscreen;
                            },
                            _ => (),
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
source

pub unsafe fn new_shared( window_builder: WindowBuilder, context_builder: ContextBuilder<'_>, events_loop: &EventsLoop ) -> Result<Self, CreationError>

Builds the given window along with the associated GL context, returning the pair as a GlWindow.

The context made can be shared with:

  • headless contexts made with the shareable_with_windowed_contexts flag set to true; and
  • contexts made when creating a GlWindow.

You are not guaranteed to receive an error if you share a context with an other context which you’re not permitted to share it with, as according to:

  • the restrictions stated by us above; and
  • the restrictions imposed on you by the platform your application runs on. (Please refer to README-SHARING.md)

Failing to follow all the context sharing restrictions imposed on you may result in unsafe behavior.

Error should be very rare and only occur in case of permission denied, incompatible system out of memory, etc.

Examples found in repository?
examples/sharing.rs (line 19)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let mut size = glutin::dpi::PhysicalSize::new(768., 480.);

    let context = glutin::ContextBuilder::new();
    let gl_context = glutin::Context::new(&events_loop, context, true).unwrap();

    let window = glutin::WindowBuilder::new().with_title("A fantastic window!")
        .with_dimensions(glutin::dpi::LogicalSize::from_physical(size, 1.0));
    let context = glutin::ContextBuilder::new()
        .with_shared_lists(&gl_context);
    let gl_window = unsafe { glutin::GlWindow::new_shared(window, context, &events_loop).unwrap() };

    let _ = unsafe { gl_window.make_current() };
    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());
    let glw = support::load(&gl_window.context());

    let mut render_tex = 0;
    unsafe {
        glw.gl.GenTextures(1, &mut render_tex);
        glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
        glw.gl.TexStorage2D(
            gl::TEXTURE_2D,
            1,
            gl::SRGB8_ALPHA8,
            size.width as _,
            size.height as _,
        );
    }

    let mut window_fb = 0;
    unsafe {
        glw.gl.GenFramebuffers(1, &mut window_fb);
        glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
        glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
        glw.gl.FramebufferTexture2D(
            gl::READ_FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
    }

    let _ = unsafe { gl_context.make_current() };
    let glc = support::load(&gl_context);

    let mut context_fb = 0;
    unsafe {
        glc.gl.GenFramebuffers(1, &mut context_fb);
        glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
        glc.gl.FramebufferTexture2D(
            gl::FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
        glc.gl.Viewport(0, 0, size.width as _, size.height as _);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let _ = unsafe { gl_window.make_current() };
                        let dpi_factor = gl_window.get_hidpi_factor();
                        size = logical_size.to_physical(dpi_factor);
                        gl_window.resize(size);

                        unsafe {
                            let _ = gl_window.make_current();
                            glw.gl.DeleteTextures(1, &render_tex);
                            glw.gl.DeleteFramebuffers(1, &window_fb);

                            glw.gl.GenTextures(1, &mut render_tex);
                            glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
                            glw.gl.TexStorage2D(
                                gl::TEXTURE_2D,
                                1,
                                gl::SRGB8_ALPHA8,
                                size.width as _,
                                size.height as _,
                            );

                            glw.gl.GenFramebuffers(1, &mut window_fb);
                            glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
                            glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
                            glw.gl.FramebufferTexture2D(
                                gl::READ_FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            let _ = gl_context.make_current();
                            glc.gl.DeleteFramebuffers(1, &context_fb);

                            glc.gl.GenFramebuffers(1, &mut context_fb);
                            glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
                            glc.gl.FramebufferTexture2D(
                                gl::FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            glc.gl.Viewport(0, 0, size.width as _, size.height as _);
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        let _ = unsafe { gl_context.make_current() };
        glc.draw_frame([1.0, 0.5, 0.7, 1.0]);

        let _ = unsafe { gl_window.make_current() };
        unsafe {
            glw.gl.BlitFramebuffer(
                0, 0, size.width as _, size.height as _,
                0, 0, size.width as _, size.height as _,
                gl::COLOR_BUFFER_BIT,
                gl::NEAREST,
            );
        }
        let _ = gl_window.swap_buffers();
    }

    unsafe {
        let _ = gl_window.make_current();
        glw.gl.DeleteTextures(1, &render_tex);
        glw.gl.DeleteFramebuffers(1, &window_fb);
        let _ = gl_context.make_current();
        glc.gl.DeleteFramebuffers(1, &context_fb);
    }
}
source

pub fn window(&self) -> &Window

Borrow the inner Window.

source

pub fn context(&self) -> &Context

Borrow the inner GL Context.

Examples found in repository?
examples/window.rs (line 17)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new().with_title("A fantastic window!");
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
More examples
Hide additional examples
examples/transparent.rs (line 20)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("A transparent window!")
        .with_decorations(false)
        .with_transparency(true);
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input: glutin::KeyboardInput {
                        virtual_keycode: Some(glutin::VirtualKeyCode::Escape),
                        ..
                    }, .. } => running = false,
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([0.0; 4]);
        let _ = gl_window.swap_buffers();
    }
}
examples/multiwindow.rs (line 17)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    let mut windows = std::collections::HashMap::new();
    for index in 0..3 {
        let title = format!("Charming Window #{}", index + 1);
        let window = glutin::WindowBuilder::new().with_title(title);
        let context = glutin::ContextBuilder::new();
        let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();
        let _ = unsafe { gl_window.make_current() };
        let gl = support::load(&gl_window.context());
        let window_id = gl_window.id();
        windows.insert(window_id, (gl_window, gl));
    }

    while !windows.is_empty() {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, window_id } => match event {
                    glutin::WindowEvent::Resized(logical_size) => {
                        let gl_window = &windows[&window_id].0;
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::CloseRequested => {
                        if windows.remove(&window_id).is_some() {
                            println!("Window with ID {:?} has been closed", window_id);
                        }
                    },
                    _ => (),
                },
                _ => (),
            }
        });

        for (index, window) in windows.values().enumerate() {
            let mut color = [1.0, 0.5, 0.7, 1.0];
            color.swap(0, index % 3);
            let _ = unsafe { window.0.make_current() };
            window.1.draw_frame(color);
            let _ = window.0.swap_buffers();
        }
    }
}
examples/fullscreen.rs (line 38)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    // enumerating monitors
    let monitor = {
        for (num, monitor) in events_loop.get_available_monitors().enumerate() {
            println!("Monitor #{}: {:?}", num, monitor.get_name());
        }

        print!("Please write the number of the monitor to use: ");
        io::stdout().flush().unwrap();

        let mut num = String::new();
        io::stdin().read_line(&mut num).unwrap();
        let num = num.trim().parse().ok().expect("Please enter a number");
        let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");

        println!("Using {:?}", monitor.get_name());

        monitor
    };

    let window = glutin::WindowBuilder::new()
        .with_title("Hello world!")
        .with_fullscreen(Some(monitor));
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    let gl = support::load(&gl_window.context());

    let mut fullscreen = true;
    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input, .. } => {
                        match input.virtual_keycode {
                            Some(glutin::VirtualKeyCode::Escape) => running = false,
                            Some(glutin::VirtualKeyCode::F) if input.state == glutin::ElementState::Pressed => {
                                let monitor = if fullscreen {
                                    None
                                } else {
                                    Some(gl_window.get_current_monitor())
                                };
                                gl_window.set_fullscreen(monitor);
                                fullscreen = !fullscreen;
                            },
                            _ => (),
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
examples/sharing.rs (line 23)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let mut size = glutin::dpi::PhysicalSize::new(768., 480.);

    let context = glutin::ContextBuilder::new();
    let gl_context = glutin::Context::new(&events_loop, context, true).unwrap();

    let window = glutin::WindowBuilder::new().with_title("A fantastic window!")
        .with_dimensions(glutin::dpi::LogicalSize::from_physical(size, 1.0));
    let context = glutin::ContextBuilder::new()
        .with_shared_lists(&gl_context);
    let gl_window = unsafe { glutin::GlWindow::new_shared(window, context, &events_loop).unwrap() };

    let _ = unsafe { gl_window.make_current() };
    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());
    let glw = support::load(&gl_window.context());

    let mut render_tex = 0;
    unsafe {
        glw.gl.GenTextures(1, &mut render_tex);
        glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
        glw.gl.TexStorage2D(
            gl::TEXTURE_2D,
            1,
            gl::SRGB8_ALPHA8,
            size.width as _,
            size.height as _,
        );
    }

    let mut window_fb = 0;
    unsafe {
        glw.gl.GenFramebuffers(1, &mut window_fb);
        glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
        glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
        glw.gl.FramebufferTexture2D(
            gl::READ_FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
    }

    let _ = unsafe { gl_context.make_current() };
    let glc = support::load(&gl_context);

    let mut context_fb = 0;
    unsafe {
        glc.gl.GenFramebuffers(1, &mut context_fb);
        glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
        glc.gl.FramebufferTexture2D(
            gl::FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
        glc.gl.Viewport(0, 0, size.width as _, size.height as _);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let _ = unsafe { gl_window.make_current() };
                        let dpi_factor = gl_window.get_hidpi_factor();
                        size = logical_size.to_physical(dpi_factor);
                        gl_window.resize(size);

                        unsafe {
                            let _ = gl_window.make_current();
                            glw.gl.DeleteTextures(1, &render_tex);
                            glw.gl.DeleteFramebuffers(1, &window_fb);

                            glw.gl.GenTextures(1, &mut render_tex);
                            glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
                            glw.gl.TexStorage2D(
                                gl::TEXTURE_2D,
                                1,
                                gl::SRGB8_ALPHA8,
                                size.width as _,
                                size.height as _,
                            );

                            glw.gl.GenFramebuffers(1, &mut window_fb);
                            glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
                            glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
                            glw.gl.FramebufferTexture2D(
                                gl::READ_FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            let _ = gl_context.make_current();
                            glc.gl.DeleteFramebuffers(1, &context_fb);

                            glc.gl.GenFramebuffers(1, &mut context_fb);
                            glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
                            glc.gl.FramebufferTexture2D(
                                gl::FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            glc.gl.Viewport(0, 0, size.width as _, size.height as _);
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        let _ = unsafe { gl_context.make_current() };
        glc.draw_frame([1.0, 0.5, 0.7, 1.0]);

        let _ = unsafe { gl_window.make_current() };
        unsafe {
            glw.gl.BlitFramebuffer(
                0, 0, size.width as _, size.height as _,
                0, 0, size.width as _, size.height as _,
                gl::COLOR_BUFFER_BIT,
                gl::NEAREST,
            );
        }
        let _ = gl_window.swap_buffers();
    }

    unsafe {
        let _ = gl_window.make_current();
        glw.gl.DeleteTextures(1, &render_tex);
        glw.gl.DeleteFramebuffers(1, &window_fb);
        let _ = gl_context.make_current();
        glc.gl.DeleteFramebuffers(1, &context_fb);
    }
}
source

pub fn swap_buffers(&self) -> Result<(), ContextError>

Swaps the buffers in case of double or triple buffering.

You should call this function every time you have finished rendering, or the image may not be displayed on the screen.

Warning: if you enabled vsync, this function will block until the next time the screen is refreshed. However drivers can choose to override your vsync settings, which means that you can’t know in advance whether swap_buffers will block or not.

Examples found in repository?
examples/window.rs (line 37)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new().with_title("A fantastic window!");
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
More examples
Hide additional examples
examples/transparent.rs (line 44)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("A transparent window!")
        .with_decorations(false)
        .with_transparency(true);
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input: glutin::KeyboardInput {
                        virtual_keycode: Some(glutin::VirtualKeyCode::Escape),
                        ..
                    }, .. } => running = false,
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([0.0; 4]);
        let _ = gl_window.swap_buffers();
    }
}
examples/multiwindow.rs (line 48)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    let mut windows = std::collections::HashMap::new();
    for index in 0..3 {
        let title = format!("Charming Window #{}", index + 1);
        let window = glutin::WindowBuilder::new().with_title(title);
        let context = glutin::ContextBuilder::new();
        let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();
        let _ = unsafe { gl_window.make_current() };
        let gl = support::load(&gl_window.context());
        let window_id = gl_window.id();
        windows.insert(window_id, (gl_window, gl));
    }

    while !windows.is_empty() {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, window_id } => match event {
                    glutin::WindowEvent::Resized(logical_size) => {
                        let gl_window = &windows[&window_id].0;
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::CloseRequested => {
                        if windows.remove(&window_id).is_some() {
                            println!("Window with ID {:?} has been closed", window_id);
                        }
                    },
                    _ => (),
                },
                _ => (),
            }
        });

        for (index, window) in windows.values().enumerate() {
            let mut color = [1.0, 0.5, 0.7, 1.0];
            color.swap(0, index % 3);
            let _ = unsafe { window.0.make_current() };
            window.1.draw_frame(color);
            let _ = window.0.swap_buffers();
        }
    }
}
examples/fullscreen.rs (line 74)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    // enumerating monitors
    let monitor = {
        for (num, monitor) in events_loop.get_available_monitors().enumerate() {
            println!("Monitor #{}: {:?}", num, monitor.get_name());
        }

        print!("Please write the number of the monitor to use: ");
        io::stdout().flush().unwrap();

        let mut num = String::new();
        io::stdin().read_line(&mut num).unwrap();
        let num = num.trim().parse().ok().expect("Please enter a number");
        let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");

        println!("Using {:?}", monitor.get_name());

        monitor
    };

    let window = glutin::WindowBuilder::new()
        .with_title("Hello world!")
        .with_fullscreen(Some(monitor));
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    let gl = support::load(&gl_window.context());

    let mut fullscreen = true;
    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input, .. } => {
                        match input.virtual_keycode {
                            Some(glutin::VirtualKeyCode::Escape) => running = false,
                            Some(glutin::VirtualKeyCode::F) if input.state == glutin::ElementState::Pressed => {
                                let monitor = if fullscreen {
                                    None
                                } else {
                                    Some(gl_window.get_current_monitor())
                                };
                                gl_window.set_fullscreen(monitor);
                                fullscreen = !fullscreen;
                            },
                            _ => (),
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
examples/sharing.rs (line 142)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let mut size = glutin::dpi::PhysicalSize::new(768., 480.);

    let context = glutin::ContextBuilder::new();
    let gl_context = glutin::Context::new(&events_loop, context, true).unwrap();

    let window = glutin::WindowBuilder::new().with_title("A fantastic window!")
        .with_dimensions(glutin::dpi::LogicalSize::from_physical(size, 1.0));
    let context = glutin::ContextBuilder::new()
        .with_shared_lists(&gl_context);
    let gl_window = unsafe { glutin::GlWindow::new_shared(window, context, &events_loop).unwrap() };

    let _ = unsafe { gl_window.make_current() };
    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());
    let glw = support::load(&gl_window.context());

    let mut render_tex = 0;
    unsafe {
        glw.gl.GenTextures(1, &mut render_tex);
        glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
        glw.gl.TexStorage2D(
            gl::TEXTURE_2D,
            1,
            gl::SRGB8_ALPHA8,
            size.width as _,
            size.height as _,
        );
    }

    let mut window_fb = 0;
    unsafe {
        glw.gl.GenFramebuffers(1, &mut window_fb);
        glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
        glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
        glw.gl.FramebufferTexture2D(
            gl::READ_FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
    }

    let _ = unsafe { gl_context.make_current() };
    let glc = support::load(&gl_context);

    let mut context_fb = 0;
    unsafe {
        glc.gl.GenFramebuffers(1, &mut context_fb);
        glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
        glc.gl.FramebufferTexture2D(
            gl::FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
        glc.gl.Viewport(0, 0, size.width as _, size.height as _);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let _ = unsafe { gl_window.make_current() };
                        let dpi_factor = gl_window.get_hidpi_factor();
                        size = logical_size.to_physical(dpi_factor);
                        gl_window.resize(size);

                        unsafe {
                            let _ = gl_window.make_current();
                            glw.gl.DeleteTextures(1, &render_tex);
                            glw.gl.DeleteFramebuffers(1, &window_fb);

                            glw.gl.GenTextures(1, &mut render_tex);
                            glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
                            glw.gl.TexStorage2D(
                                gl::TEXTURE_2D,
                                1,
                                gl::SRGB8_ALPHA8,
                                size.width as _,
                                size.height as _,
                            );

                            glw.gl.GenFramebuffers(1, &mut window_fb);
                            glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
                            glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
                            glw.gl.FramebufferTexture2D(
                                gl::READ_FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            let _ = gl_context.make_current();
                            glc.gl.DeleteFramebuffers(1, &context_fb);

                            glc.gl.GenFramebuffers(1, &mut context_fb);
                            glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
                            glc.gl.FramebufferTexture2D(
                                gl::FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            glc.gl.Viewport(0, 0, size.width as _, size.height as _);
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        let _ = unsafe { gl_context.make_current() };
        glc.draw_frame([1.0, 0.5, 0.7, 1.0]);

        let _ = unsafe { gl_window.make_current() };
        unsafe {
            glw.gl.BlitFramebuffer(
                0, 0, size.width as _, size.height as _,
                0, 0, size.width as _, size.height as _,
                gl::COLOR_BUFFER_BIT,
                gl::NEAREST,
            );
        }
        let _ = gl_window.swap_buffers();
    }

    unsafe {
        let _ = gl_window.make_current();
        glw.gl.DeleteTextures(1, &render_tex);
        glw.gl.DeleteFramebuffers(1, &window_fb);
        let _ = gl_context.make_current();
        glc.gl.DeleteFramebuffers(1, &context_fb);
    }
}
source

pub fn get_pixel_format(&self) -> PixelFormat

Returns the pixel format of the main framebuffer of the context.

Examples found in repository?
examples/window.rs (line 15)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new().with_title("A fantastic window!");
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
More examples
Hide additional examples
examples/transparent.rs (line 18)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("A transparent window!")
        .with_decorations(false)
        .with_transparency(true);
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input: glutin::KeyboardInput {
                        virtual_keycode: Some(glutin::VirtualKeyCode::Escape),
                        ..
                    }, .. } => running = false,
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([0.0; 4]);
        let _ = gl_window.swap_buffers();
    }
}
examples/sharing.rs (line 22)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let mut size = glutin::dpi::PhysicalSize::new(768., 480.);

    let context = glutin::ContextBuilder::new();
    let gl_context = glutin::Context::new(&events_loop, context, true).unwrap();

    let window = glutin::WindowBuilder::new().with_title("A fantastic window!")
        .with_dimensions(glutin::dpi::LogicalSize::from_physical(size, 1.0));
    let context = glutin::ContextBuilder::new()
        .with_shared_lists(&gl_context);
    let gl_window = unsafe { glutin::GlWindow::new_shared(window, context, &events_loop).unwrap() };

    let _ = unsafe { gl_window.make_current() };
    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());
    let glw = support::load(&gl_window.context());

    let mut render_tex = 0;
    unsafe {
        glw.gl.GenTextures(1, &mut render_tex);
        glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
        glw.gl.TexStorage2D(
            gl::TEXTURE_2D,
            1,
            gl::SRGB8_ALPHA8,
            size.width as _,
            size.height as _,
        );
    }

    let mut window_fb = 0;
    unsafe {
        glw.gl.GenFramebuffers(1, &mut window_fb);
        glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
        glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
        glw.gl.FramebufferTexture2D(
            gl::READ_FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
    }

    let _ = unsafe { gl_context.make_current() };
    let glc = support::load(&gl_context);

    let mut context_fb = 0;
    unsafe {
        glc.gl.GenFramebuffers(1, &mut context_fb);
        glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
        glc.gl.FramebufferTexture2D(
            gl::FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
        glc.gl.Viewport(0, 0, size.width as _, size.height as _);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let _ = unsafe { gl_window.make_current() };
                        let dpi_factor = gl_window.get_hidpi_factor();
                        size = logical_size.to_physical(dpi_factor);
                        gl_window.resize(size);

                        unsafe {
                            let _ = gl_window.make_current();
                            glw.gl.DeleteTextures(1, &render_tex);
                            glw.gl.DeleteFramebuffers(1, &window_fb);

                            glw.gl.GenTextures(1, &mut render_tex);
                            glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
                            glw.gl.TexStorage2D(
                                gl::TEXTURE_2D,
                                1,
                                gl::SRGB8_ALPHA8,
                                size.width as _,
                                size.height as _,
                            );

                            glw.gl.GenFramebuffers(1, &mut window_fb);
                            glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
                            glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
                            glw.gl.FramebufferTexture2D(
                                gl::READ_FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            let _ = gl_context.make_current();
                            glc.gl.DeleteFramebuffers(1, &context_fb);

                            glc.gl.GenFramebuffers(1, &mut context_fb);
                            glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
                            glc.gl.FramebufferTexture2D(
                                gl::FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            glc.gl.Viewport(0, 0, size.width as _, size.height as _);
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        let _ = unsafe { gl_context.make_current() };
        glc.draw_frame([1.0, 0.5, 0.7, 1.0]);

        let _ = unsafe { gl_window.make_current() };
        unsafe {
            glw.gl.BlitFramebuffer(
                0, 0, size.width as _, size.height as _,
                0, 0, size.width as _, size.height as _,
                gl::COLOR_BUFFER_BIT,
                gl::NEAREST,
            );
        }
        let _ = gl_window.swap_buffers();
    }

    unsafe {
        let _ = gl_window.make_current();
        glw.gl.DeleteTextures(1, &render_tex);
        glw.gl.DeleteFramebuffers(1, &window_fb);
        let _ = gl_context.make_current();
        glc.gl.DeleteFramebuffers(1, &context_fb);
    }
}
source

pub fn resize(&self, size: PhysicalSize)

Resize the context.

Some platforms (macOS, Wayland) require being manually updated when their window or surface is resized.

The easiest way of doing this is to take every Resized window event that is received with a LogicalSize and convert it to a PhysicalSize and pass it into this function.

Examples found in repository?
examples/window.rs (line 28)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new().with_title("A fantastic window!");
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
More examples
Hide additional examples
examples/transparent.rs (line 31)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("A transparent window!")
        .with_decorations(false)
        .with_transparency(true);
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());

    let gl = support::load(&gl_window.context());

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input: glutin::KeyboardInput {
                        virtual_keycode: Some(glutin::VirtualKeyCode::Escape),
                        ..
                    }, .. } => running = false,
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([0.0; 4]);
        let _ = gl_window.swap_buffers();
    }
}
examples/multiwindow.rs (line 30)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    let mut windows = std::collections::HashMap::new();
    for index in 0..3 {
        let title = format!("Charming Window #{}", index + 1);
        let window = glutin::WindowBuilder::new().with_title(title);
        let context = glutin::ContextBuilder::new();
        let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();
        let _ = unsafe { gl_window.make_current() };
        let gl = support::load(&gl_window.context());
        let window_id = gl_window.id();
        windows.insert(window_id, (gl_window, gl));
    }

    while !windows.is_empty() {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, window_id } => match event {
                    glutin::WindowEvent::Resized(logical_size) => {
                        let gl_window = &windows[&window_id].0;
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::CloseRequested => {
                        if windows.remove(&window_id).is_some() {
                            println!("Window with ID {:?} has been closed", window_id);
                        }
                    },
                    _ => (),
                },
                _ => (),
            }
        });

        for (index, window) in windows.values().enumerate() {
            let mut color = [1.0, 0.5, 0.7, 1.0];
            color.swap(0, index % 3);
            let _ = unsafe { window.0.make_current() };
            window.1.draw_frame(color);
            let _ = window.0.swap_buffers();
        }
    }
}
examples/fullscreen.rs (line 50)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();

    // enumerating monitors
    let monitor = {
        for (num, monitor) in events_loop.get_available_monitors().enumerate() {
            println!("Monitor #{}: {:?}", num, monitor.get_name());
        }

        print!("Please write the number of the monitor to use: ");
        io::stdout().flush().unwrap();

        let mut num = String::new();
        io::stdin().read_line(&mut num).unwrap();
        let num = num.trim().parse().ok().expect("Please enter a number");
        let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");

        println!("Using {:?}", monitor.get_name());

        monitor
    };

    let window = glutin::WindowBuilder::new()
        .with_title("Hello world!")
        .with_fullscreen(Some(monitor));
    let context = glutin::ContextBuilder::new();
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    let _ = unsafe { gl_window.make_current() };

    let gl = support::load(&gl_window.context());

    let mut fullscreen = true;
    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let dpi_factor = gl_window.get_hidpi_factor();
                        gl_window.resize(logical_size.to_physical(dpi_factor));
                    },
                    glutin::WindowEvent::KeyboardInput { input, .. } => {
                        match input.virtual_keycode {
                            Some(glutin::VirtualKeyCode::Escape) => running = false,
                            Some(glutin::VirtualKeyCode::F) if input.state == glutin::ElementState::Pressed => {
                                let monitor = if fullscreen {
                                    None
                                } else {
                                    Some(gl_window.get_current_monitor())
                                };
                                gl_window.set_fullscreen(monitor);
                                fullscreen = !fullscreen;
                            },
                            _ => (),
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        gl.draw_frame([1.0, 0.5, 0.7, 1.0]);
        let _ = gl_window.swap_buffers();
    }
}
examples/sharing.rs (line 80)
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fn main() {
    let mut events_loop = glutin::EventsLoop::new();
    let mut size = glutin::dpi::PhysicalSize::new(768., 480.);

    let context = glutin::ContextBuilder::new();
    let gl_context = glutin::Context::new(&events_loop, context, true).unwrap();

    let window = glutin::WindowBuilder::new().with_title("A fantastic window!")
        .with_dimensions(glutin::dpi::LogicalSize::from_physical(size, 1.0));
    let context = glutin::ContextBuilder::new()
        .with_shared_lists(&gl_context);
    let gl_window = unsafe { glutin::GlWindow::new_shared(window, context, &events_loop).unwrap() };

    let _ = unsafe { gl_window.make_current() };
    println!("Pixel format of the window's GL context: {:?}", gl_window.get_pixel_format());
    let glw = support::load(&gl_window.context());

    let mut render_tex = 0;
    unsafe {
        glw.gl.GenTextures(1, &mut render_tex);
        glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
        glw.gl.TexStorage2D(
            gl::TEXTURE_2D,
            1,
            gl::SRGB8_ALPHA8,
            size.width as _,
            size.height as _,
        );
    }

    let mut window_fb = 0;
    unsafe {
        glw.gl.GenFramebuffers(1, &mut window_fb);
        glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
        glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
        glw.gl.FramebufferTexture2D(
            gl::READ_FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
    }

    let _ = unsafe { gl_context.make_current() };
    let glc = support::load(&gl_context);

    let mut context_fb = 0;
    unsafe {
        glc.gl.GenFramebuffers(1, &mut context_fb);
        glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
        glc.gl.FramebufferTexture2D(
            gl::FRAMEBUFFER,
            gl::COLOR_ATTACHMENT0,
            gl::TEXTURE_2D,
            render_tex,
            0,
        );
        glc.gl.Viewport(0, 0, size.width as _, size.height as _);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            println!("{:?}", event);
            match event {
                glutin::Event::WindowEvent { event, .. } => match event {
                    glutin::WindowEvent::CloseRequested => running = false,
                    glutin::WindowEvent::Resized(logical_size) => {
                        let _ = unsafe { gl_window.make_current() };
                        let dpi_factor = gl_window.get_hidpi_factor();
                        size = logical_size.to_physical(dpi_factor);
                        gl_window.resize(size);

                        unsafe {
                            let _ = gl_window.make_current();
                            glw.gl.DeleteTextures(1, &render_tex);
                            glw.gl.DeleteFramebuffers(1, &window_fb);

                            glw.gl.GenTextures(1, &mut render_tex);
                            glw.gl.BindTexture(gl::TEXTURE_2D, render_tex);
                            glw.gl.TexStorage2D(
                                gl::TEXTURE_2D,
                                1,
                                gl::SRGB8_ALPHA8,
                                size.width as _,
                                size.height as _,
                            );

                            glw.gl.GenFramebuffers(1, &mut window_fb);
                            glw.gl.BindFramebuffer(gl::READ_FRAMEBUFFER, window_fb);
                            glw.gl.BindFramebuffer(gl::DRAW_FRAMEBUFFER, 0);
                            glw.gl.FramebufferTexture2D(
                                gl::READ_FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            let _ = gl_context.make_current();
                            glc.gl.DeleteFramebuffers(1, &context_fb);

                            glc.gl.GenFramebuffers(1, &mut context_fb);
                            glc.gl.BindFramebuffer(gl::FRAMEBUFFER, context_fb);
                            glc.gl.FramebufferTexture2D(
                                gl::FRAMEBUFFER,
                                gl::COLOR_ATTACHMENT0,
                                gl::TEXTURE_2D,
                                render_tex,
                                0,
                            );

                            glc.gl.Viewport(0, 0, size.width as _, size.height as _);
                        }
                    },
                    _ => (),
                },
                _ => ()
            }
        });

        let _ = unsafe { gl_context.make_current() };
        glc.draw_frame([1.0, 0.5, 0.7, 1.0]);

        let _ = unsafe { gl_window.make_current() };
        unsafe {
            glw.gl.BlitFramebuffer(
                0, 0, size.width as _, size.height as _,
                0, 0, size.width as _, size.height as _,
                gl::COLOR_BUFFER_BIT,
                gl::NEAREST,
            );
        }
        let _ = gl_window.swap_buffers();
    }

    unsafe {
        let _ = gl_window.make_current();
        glw.gl.DeleteTextures(1, &render_tex);
        glw.gl.DeleteFramebuffers(1, &window_fb);
        let _ = gl_context.make_current();
        glc.gl.DeleteFramebuffers(1, &context_fb);
    }
}

Methods from Deref<Target = Window>§

source

pub fn set_title(&self, title: &str)

Modifies the title of the window.

This is a no-op if the window has already been closed.

source

pub fn show(&self)

Shows the window if it was hidden.

Platform-specific
  • Has no effect on Android
source

pub fn hide(&self)

Hides the window if it was visible.

Platform-specific
  • Has no effect on Android
source

pub fn get_position(&self) -> Option<LogicalPosition>

Returns the position of the top-left hand corner of the window relative to the top-left hand corner of the desktop.

Note that the top-left hand corner of the desktop is not necessarily the same as the screen. If the user uses a desktop with multiple monitors, the top-left hand corner of the desktop is the top-left hand corner of the monitor at the top-left of the desktop.

The coordinates can be negative if the top-left hand corner of the window is outside of the visible screen region.

Returns None if the window no longer exists.

source

pub fn get_inner_position(&self) -> Option<LogicalPosition>

Returns the position of the top-left hand corner of the window’s client area relative to the top-left hand corner of the desktop.

The same conditions that apply to get_position apply to this method.

source

pub fn set_position(&self, position: LogicalPosition)

Modifies the position of the window.

See get_position for more information about the coordinates.

This is a no-op if the window has already been closed.

source

pub fn get_inner_size(&self) -> Option<LogicalSize>

Returns the logical size of the window’s client area.

The client area is the content of the window, excluding the title bar and borders.

Converting the returned LogicalSize to PhysicalSize produces the size your framebuffer should be.

Returns None if the window no longer exists.

source

pub fn get_outer_size(&self) -> Option<LogicalSize>

Returns the logical size of the entire window.

These dimensions include the title bar and borders. If you don’t want that (and you usually don’t), use get_inner_size instead.

Returns None if the window no longer exists.

source

pub fn set_inner_size(&self, size: LogicalSize)

Modifies the inner size of the window.

See get_inner_size for more information about the values.

This is a no-op if the window has already been closed.

source

pub fn set_min_dimensions(&self, dimensions: Option<LogicalSize>)

Sets a minimum dimension size for the window.

source

pub fn set_max_dimensions(&self, dimensions: Option<LogicalSize>)

Sets a maximum dimension size for the window.

source

pub fn set_resizable(&self, resizable: bool)

Sets whether the window is resizable or not.

Note that making the window unresizable doesn’t exempt you from handling Resized, as that event can still be triggered by DPI scaling, entering fullscreen mode, etc.

Platform-specific

This only has an effect on desktop platforms.

Due to a bug in XFCE, this has no effect on Xfwm.

source

pub fn get_hidpi_factor(&self) -> f64

Returns the DPI factor that can be used to map logical pixels to physical pixels, and vice versa.

See the dpi module for more information.

Note that this value can change depending on user action (for example if the window is moved to another screen); as such, tracking WindowEvent::HiDpiFactorChanged events is the most robust way to track the DPI you need to use to draw.

Platform-specific
  • X11: Can be overridden using the WINIT_HIDPI_FACTOR environment variable.
  • Android: Always returns 1.0.
source

pub fn set_cursor(&self, cursor: MouseCursor)

Modifies the mouse cursor of the window. Has no effect on Android.

source

pub fn set_cursor_position( &self, position: LogicalPosition ) -> Result<(), String>

Changes the position of the cursor in window coordinates.

source

pub fn grab_cursor(&self, grab: bool) -> Result<(), String>

Grabs the cursor, preventing it from leaving the window.

Platform-specific

On macOS, this presently merely locks the cursor in a fixed location, which looks visually awkward.

This has no effect on Android or iOS.

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pub fn hide_cursor(&self, hide: bool)

Hides the cursor, making it invisible but still usable.

Platform-specific

On Windows and X11, the cursor is only hidden within the confines of the window.

On macOS, the cursor is hidden as long as the window has input focus, even if the cursor is outside of the window.

This has no effect on Android or iOS.

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pub fn set_maximized(&self, maximized: bool)

Sets the window to maximized or back

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pub fn set_fullscreen(&self, monitor: Option<MonitorId>)

Sets the window to fullscreen or back

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pub fn set_decorations(&self, decorations: bool)

Turn window decorations on or off.

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pub fn set_always_on_top(&self, always_on_top: bool)

Change whether or not the window will always be on top of other windows.

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pub fn set_window_icon(&self, window_icon: Option<Icon>)

Sets the window icon. On Windows and X11, this is typically the small icon in the top-left corner of the titlebar.

For more usage notes, see WindowBuilder::with_window_icon.

Platform-specific

This only has an effect on Windows and X11.

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pub fn set_ime_spot(&self, position: LogicalPosition)

Sets location of IME candidate box in client area coordinates relative to the top left.

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pub fn get_current_monitor(&self) -> MonitorId

Returns the monitor on which the window currently resides

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pub fn get_available_monitors(&self) -> AvailableMonitorsIter ⓘ

Returns the list of all the monitors available on the system.

This is the same as EventsLoop::get_available_monitors, and is provided for convenience.

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pub fn get_primary_monitor(&self) -> MonitorId

Returns the primary monitor of the system.

This is the same as EventsLoop::get_primary_monitor, and is provided for convenience.

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pub fn id(&self) -> WindowId

Trait Implementations§

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impl Deref for GlWindow

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type Target = Window

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl GlContext for GlWindow

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unsafe fn make_current(&self) -> Result<(), ContextError>

Sets the context as the current context.
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fn is_current(&self) -> bool

Returns true if this context is the current one in this thread.
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fn get_proc_address(&self, addr: &str) -> *const ()

Returns the address of an OpenGL function.
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fn get_api(&self) -> Api

Returns the OpenGL API being used.

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> SetParameter for T

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fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Resultwhere T: Parameter<Self>,

Sets value as a parameter of self.
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.