editor with imgui and sdl->28

src/editor/inspector.rs

@@ -0,0 +1,98 @@
+use dear_imgui_rs::{Condition, Context};
+use dear_imgui_wgpu::{WgpuInitInfo, WgpuRenderer};
+use sdl3_sys::events::SDL_Event;
+
+pub struct FrameStats
+{
+    pub fps: f32,
+    pub frame_ms: f32,
+    pub physics_budget_ms: f32,
+    pub draw_call_count: usize,
+}
+
+pub struct Inspector
+{
+    imgui: Context,
+    renderer: WgpuRenderer,
+}
+
+impl Inspector
+{
+    pub fn new(
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        surface_format: wgpu::TextureFormat,
+    ) -> Self
+    {
+        let mut imgui = Context::create();
+        let init_info = WgpuInitInfo::new(device.clone(), queue.clone(), surface_format);
+        let renderer =
+            WgpuRenderer::new(init_info, &mut imgui).expect("Failed to create imgui wgpu renderer");
+        Self { imgui, renderer }
+    }
+
+    pub fn init_platform(&mut self, window: &sdl3::video::Window)
+    {
+        dear_imgui_sdl3::init_for_other(&mut self.imgui, window)
+            .expect("Failed to init imgui sdl3 platform");
+    }
+
+    pub fn begin_frame(&mut self)
+    {
+        dear_imgui_sdl3::sdl3_new_frame(&mut self.imgui);
+    }
+
+    pub fn process_event(&mut self, raw_event: &SDL_Event)
+    {
+        dear_imgui_sdl3::process_sys_event(raw_event);
+    }
+
+    pub fn wants_keyboard(&self) -> bool
+    {
+        self.imgui.io().want_capture_keyboard()
+    }
+
+    pub fn wants_mouse(&self) -> bool
+    {
+        self.imgui.io().want_capture_mouse()
+    }
+
+    pub fn build_ui(&mut self, stats: &FrameStats)
+    {
+        let ui = self.imgui.frame();
+        ui.window("Inspector")
+            .position([10.0, 10.0], Condition::FirstUseEver)
+            .build(|| {
+                ui.text(format!("FPS:        {:.1}", stats.fps));
+                ui.text(format!("Frame:      {:.1} ms", stats.frame_ms));
+                ui.text(format!("Physics:    {:.1} ms", stats.physics_budget_ms));
+                ui.text(format!("Draw calls: {}", stats.draw_call_count));
+            });
+    }
+
+    pub fn render(&mut self, encoder: &mut wgpu::CommandEncoder, view: &wgpu::TextureView)
+    {
+        let draw_data = self.imgui.render();
+
+        let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+            label: Some("ImGui Render Pass"),
+            color_attachments: &[Some(wgpu::RenderPassColorAttachment {
+                view,
+                resolve_target: None,
+                ops: wgpu::Operations {
+                    load: wgpu::LoadOp::Load,
+                    store: wgpu::StoreOp::Store,
+                },
+                depth_slice: None,
+            })],
+            depth_stencil_attachment: None,
+            occlusion_query_set: None,
+            timestamp_writes: None,
+            multiview_mask: None,
+        });
+
+        self.renderer
+            .render_draw_data(draw_data, &mut render_pass)
+            .expect("Failed to render imgui");
+    }
+}

src/editor/mod.rs

@@ -0,0 +1,82 @@
+mod inspector;
+
+use sdl3_sys::events::SDL_Event;
+
+use crate::entity::EntityHandle;
+use crate::systems::camera_noclip_system;
+use crate::utility::input::InputState;
+use crate::world::World;
+
+pub use inspector::FrameStats;
+use inspector::Inspector;
+
+pub struct EditorState
+{
+    pub active: bool,
+    pub right_mouse_held: bool,
+    pub selected_entity: Option<EntityHandle>,
+    inspector: Inspector,
+}
+
+impl EditorState
+{
+    pub fn new(
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        surface_format: wgpu::TextureFormat,
+    ) -> Self
+    {
+        Self {
+            active: false,
+            right_mouse_held: false,
+            selected_entity: None,
+            inspector: Inspector::new(device, queue, surface_format),
+        }
+    }
+
+    pub fn init_platform(&mut self, window: &sdl3::video::Window)
+    {
+        self.inspector.init_platform(window);
+    }
+
+    pub fn begin_frame(&mut self)
+    {
+        self.inspector.begin_frame();
+    }
+
+    pub fn process_event(&mut self, raw_event: &SDL_Event) -> bool
+    {
+        self.inspector.process_event(raw_event);
+        false
+    }
+
+    pub fn wants_keyboard(&self) -> bool
+    {
+        self.inspector.wants_keyboard()
+    }
+
+    pub fn wants_mouse(&self) -> bool
+    {
+        self.inspector.wants_mouse()
+    }
+
+    pub fn render(&mut self, encoder: &mut wgpu::CommandEncoder, view: &wgpu::TextureView)
+    {
+        self.inspector.render(encoder, view);
+    }
+}
+
+pub fn editor_loop(
+    editor: &mut EditorState,
+    world: &mut World,
+    input_state: &InputState,
+    stats: &FrameStats,
+    delta: f32,
+)
+{
+    if editor.right_mouse_held
+    {
+        camera_noclip_system(world, input_state, delta);
+    }
+    editor.inspector.build_ui(stats);
+}