Rename `integration` examples

1 files changed, 239 insertions, 0 deletions

diff --git a/examples/integration_wgpu/src/main.rs b/examples/integration_wgpu/src/main.rs
new file mode 100644
index 00000000..6f319466
--- /dev/null
+++ b/examples/integration_wgpu/src/main.rs
@@ -0,0 +1,239 @@
+mod controls;
+mod scene;
+
+use controls::Controls;
+use scene::Scene;
+
+use iced_wgpu::{wgpu, Backend, Renderer, Settings, Viewport};
+use iced_winit::{conversion, futures, program, winit, Clipboard, Debug, Size};
+
+use futures::task::SpawnExt;
+use winit::{
+    dpi::PhysicalPosition,
+    event::{Event, ModifiersState, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+};
+
+pub fn main() {
+    env_logger::init();
+
+    // Initialize winit
+    let event_loop = EventLoop::new();
+    let window = winit::window::Window::new(&event_loop).unwrap();
+
+    let physical_size = window.inner_size();
+    let mut viewport = Viewport::with_physical_size(
+        Size::new(physical_size.width, physical_size.height),
+        window.scale_factor(),
+    );
+    let mut cursor_position = PhysicalPosition::new(-1.0, -1.0);
+    let mut modifiers = ModifiersState::default();
+    let mut clipboard = Clipboard::connect(&window);
+
+    // Initialize wgpu
+    let instance = wgpu::Instance::new(wgpu::BackendBit::PRIMARY);
+    let surface = unsafe { instance.create_surface(&window) };
+
+    let (format, (mut device, queue)) = futures::executor::block_on(async {
+        let adapter = instance
+            .request_adapter(&wgpu::RequestAdapterOptions {
+                power_preference: wgpu::PowerPreference::HighPerformance,
+                compatible_surface: Some(&surface),
+            })
+            .await
+            .expect("Request adapter");
+
+        (
+            adapter
+                .get_swap_chain_preferred_format(&surface)
+                .expect("Get preferred format"),
+            adapter
+                .request_device(
+                    &wgpu::DeviceDescriptor {
+                        label: None,
+                        features: wgpu::Features::empty(),
+                        limits: wgpu::Limits::default(),
+                    },
+                    None,
+                )
+                .await
+                .expect("Request device"),
+        )
+    });
+
+    let mut swap_chain = {
+        let size = window.inner_size();
+
+        device.create_swap_chain(
+            &surface,
+            &wgpu::SwapChainDescriptor {
+                usage: wgpu::TextureUsage::RENDER_ATTACHMENT,
+                format,
+                width: size.width,
+                height: size.height,
+                present_mode: wgpu::PresentMode::Mailbox,
+            },
+        )
+    };
+    let mut resized = false;
+
+    // Initialize staging belt and local pool
+    let mut staging_belt = wgpu::util::StagingBelt::new(5 * 1024);
+    let mut local_pool = futures::executor::LocalPool::new();
+
+    // Initialize scene and GUI controls
+    let scene = Scene::new(&mut device);
+    let controls = Controls::new();
+
+    // Initialize iced
+    let mut debug = Debug::new();
+    let mut renderer =
+        Renderer::new(Backend::new(&mut device, Settings::default(), format));
+
+    let mut state = program::State::new(
+        controls,
+        viewport.logical_size(),
+        conversion::cursor_position(cursor_position, viewport.scale_factor()),
+        &mut renderer,
+        &mut debug,
+    );
+
+    // Run event loop
+    event_loop.run(move |event, _, control_flow| {
+        // You should change this if you want to render continuosly
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent { event, .. } => {
+                match event {
+                    WindowEvent::CursorMoved { position, .. } => {
+                        cursor_position = position;
+                    }
+                    WindowEvent::ModifiersChanged(new_modifiers) => {
+                        modifiers = new_modifiers;
+                    }
+                    WindowEvent::Resized(new_size) => {
+                        viewport = Viewport::with_physical_size(
+                            Size::new(new_size.width, new_size.height),
+                            window.scale_factor(),
+                        );
+
+                        resized = true;
+                    }
+                    WindowEvent::CloseRequested => {
+                        *control_flow = ControlFlow::Exit;
+                    }
+                    _ => {}
+                }
+
+                // Map window event to iced event
+                if let Some(event) = iced_winit::conversion::window_event(
+                    &event,
+                    window.scale_factor(),
+                    modifiers,
+                ) {
+                    state.queue_event(event);
+                }
+            }
+            Event::MainEventsCleared => {
+                // If there are events pending
+                if !state.is_queue_empty() {
+                    // We update iced
+                    let _ = state.update(
+                        viewport.logical_size(),
+                        conversion::cursor_position(
+                            cursor_position,
+                            viewport.scale_factor(),
+                        ),
+                        &mut renderer,
+                        &mut clipboard,
+                        &mut debug,
+                    );
+
+                    // and request a redraw
+                    window.request_redraw();
+                }
+            }
+            Event::RedrawRequested(_) => {
+                if resized {
+                    let size = window.inner_size();
+
+                    swap_chain = device.create_swap_chain(
+                        &surface,
+                        &wgpu::SwapChainDescriptor {
+                            usage: wgpu::TextureUsage::RENDER_ATTACHMENT,
+                            format: format,
+                            width: size.width,
+                            height: size.height,
+                            present_mode: wgpu::PresentMode::Mailbox,
+                        },
+                    );
+
+                    resized = false;
+                }
+
+                match swap_chain.get_current_frame() {
+                    Ok(frame) => {
+                        let mut encoder = device.create_command_encoder(
+                            &wgpu::CommandEncoderDescriptor { label: None },
+                        );
+
+                        let program = state.program();
+
+                        {
+                            // We clear the frame
+                            let mut render_pass = scene.clear(
+                                &frame.output.view,
+                                &mut encoder,
+                                program.background_color(),
+                            );
+
+                            // Draw the scene
+                            scene.draw(&mut render_pass);
+                        }
+
+                        // And then iced on top
+                        let mouse_interaction = renderer.backend_mut().draw(
+                            &mut device,
+                            &mut staging_belt,
+                            &mut encoder,
+                            &frame.output.view,
+                            &viewport,
+                            state.primitive(),
+                            &debug.overlay(),
+                        );
+
+                        // Then we submit the work
+                        staging_belt.finish();
+                        queue.submit(Some(encoder.finish()));
+
+                        // Update the mouse cursor
+                        window.set_cursor_icon(
+                            iced_winit::conversion::mouse_interaction(
+                                mouse_interaction,
+                            ),
+                        );
+
+                        // And recall staging buffers
+                        local_pool
+                            .spawner()
+                            .spawn(staging_belt.recall())
+                            .expect("Recall staging buffers");
+
+                        local_pool.run_until_stalled();
+                    }
+                    Err(error) => match error {
+                        wgpu::SwapChainError::OutOfMemory => {
+                            panic!("Swapchain error: {}. Rendering cannot continue.", error)
+                        }
+                        _ => {
+                            // Try rendering again next frame.
+                            window.request_redraw();
+                        }
+                    },
+                }
+            }
+            _ => {}
+        }
+    })
+}