refactor: Refactor startup process to delay setting window size.

Setting initial window size moved into draw_frame, and called
after fonts are loaded. So initial window size matches requested
geometry.

This also fixes missing startup screen, as UiCommand::Resize is not
called on startup.

src/bridge/ui_commands.rs

@@ -16,8 +16,8 @@ use crate::windows_utils::{
 pub enum UiCommand {
     Quit,
     Resize {
-        width: u32,
-        height: u32,
+        width: u64,
+        height: u64,
     },
     Keyboard(String),
     MouseButton {

src/editor/mod.rs

@@ -236,7 +236,6 @@ impl Editor {
     }
 
     fn resize_window(&mut self, grid: u64, width: u64, height: u64) {
-        trace!("editor resize {}", grid);
         if let Some(window) = self.windows.get_mut(&grid) {
             window.resize((width, height));
         } else {

src/renderer/mod.rs

@@ -2,6 +2,7 @@ use std::collections::HashMap;
 use std::sync::mpsc::Receiver;
 use std::sync::Arc;
 
+use glutin::dpi::PhysicalSize;
 use log::{error, trace};
 use skia_safe::{colors, dash_path_effect, BlendMode, Canvas, Color, Paint, Rect, HSV};
 
@@ -51,6 +52,7 @@ pub struct Renderer {
     pub font_height: u64,
     pub window_regions: Vec<WindowDrawDetails>,
     pub batched_draw_command_receiver: Receiver<Vec<DrawCommand>>,
+    pub is_ready: bool,
 }
 
 impl Renderer {
@@ -84,6 +86,24 @@ impl Renderer {
             font_height,
             window_regions,
             batched_draw_command_receiver,
+            is_ready: false,
+        }
+    }
+
+    // TODO: Refactor code to use these two functions instead of multiplication.
+    /// Convert PhysicalSize to grid size
+    pub fn to_grid_size(&self, new_size: PhysicalSize<u32>) -> (u64, u64) {
+        let width = new_size.width as u64 / self.font_width;
+        let height = new_size.height as u64 / self.font_height;
+        (width, height)
+    }
+
+    /// Convert grid size to PhysicalSize
+    pub fn to_physical_size(&self, new_size: (u64, u64)) -> PhysicalSize<u32> {
+        let (width, height) = new_size;
+        PhysicalSize {
+            width: (width * self.font_width) as u32,
+            height: (height * self.font_height) as u32,
         }
     }
 
@@ -101,10 +121,11 @@ impl Renderer {
         let (font_width, font_height) = self.shaper.font_base_dimensions();
         self.font_width = font_width;
         self.font_height = font_height;
+        self.is_ready = true;
         trace!(
             "Updating font dimensions: {}x{}",
-            self.font_height,
             self.font_width,
+            self.font_height,
         );
     }
 

src/settings/window_geometry.rs

@@ -1,7 +1,5 @@
-use crate::renderer::Renderer;
 use crate::settings::SETTINGS;
 use crate::window::WindowSettings;
-use glutin::dpi::PhysicalSize;
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
@@ -36,12 +34,10 @@ pub const DEFAULT_WINDOW_GEOMETRY: WindowGeometry = WindowGeometry {
     height: 50,
 };
 
-pub fn maybe_save_window_size(window_size: PhysicalSize<u32>, renderer: &Renderer) {
+pub fn maybe_save_window_size(grid_size: (u64, u64)) {
     let saved_window_size = if SETTINGS.get::<WindowSettings>().remember_window_size {
-        WindowGeometry {
-            width: (window_size.width as f32 / renderer.font_width as f32) as u64,
-            height: (window_size.height as f32 / renderer.font_height as f32) as u64,
-        }
+        let (width, height) = grid_size;
+        WindowGeometry { width, height }
     } else {
         WindowGeometry {
             width: DEFAULT_WINDOW_GEOMETRY.width as u64,

src/window/window_wrapper/mod.rs

@@ -52,7 +52,9 @@ pub struct GlutinWindowWrapper {
     mouse_manager: MouseManager,
     title: String,
     fullscreen: bool,
+    first_render_pass: bool,
     saved_inner_size: PhysicalSize<u32>,
+    saved_grid_size: (u64, u64),
     ui_command_sender: LoggingTx<UiCommand>,
     window_command_receiver: Receiver<WindowCommand>,
 }
@@ -162,41 +164,44 @@ impl GlutinWindowWrapper {
 
     pub fn draw_frame(&mut self, dt: f32) {
         let window = self.windowed_context.window();
-        let current_size = window.inner_size();
-        let previous_size = self.saved_inner_size;
-
-        if previous_size != current_size {
-            trace!("Updating grid size: {:#?}", current_size);
-            self.saved_inner_size = current_size;
-            self.handle_new_grid_size(current_size);
-            self.skia_renderer.resize(&self.windowed_context);
-        }
 
         if REDRAW_SCHEDULER.should_draw() || SETTINGS.get::<WindowSettings>().no_idle {
-            let renderer = &mut self.renderer;
+            self.renderer.draw_frame(self.skia_renderer.canvas(), dt);
+            self.skia_renderer.gr_context.flush(None);
+            self.windowed_context.swap_buffers().unwrap();
+        }
 
-            {
-                let canvas = self.skia_renderer.canvas();
+        // Wait until fonts are loaded, so we can set proper window size.
+        if !self.renderer.is_ready {
+            return;
+        }
 
-                if renderer.draw_frame(canvas, dt) {
-                    self.handle_new_grid_size(current_size);
-                }
+        if self.first_render_pass {
+            self.first_render_pass = false;
+            if !window.is_maximized() {
+                window.set_inner_size(self.renderer.to_physical_size(self.saved_grid_size));
             }
+        }
 
-            self.skia_renderer.gr_context.flush(None);
-            self.windowed_context.swap_buffers().unwrap();
+        let new_size = window.inner_size();
+
+        if self.saved_inner_size != new_size {
+            self.saved_inner_size = new_size;
+            self.handle_new_grid_size(new_size);
+            self.skia_renderer.resize(&self.windowed_context);
         }
     }
 
-    fn handle_new_grid_size(&self, new_size: PhysicalSize<u32>) {
-        if new_size.width > 0 && new_size.height > 0 {
-            // Add 1 here to make sure resizing doesn't change the grid size on startup
-            let width = ((new_size.width + 1) / self.renderer.font_width as u32) as u32;
-            let height = ((new_size.height + 1) / self.renderer.font_height as u32) as u32;
-            self.ui_command_sender
-                .send(UiCommand::Resize { width, height })
-                .ok();
+    fn handle_new_grid_size(&mut self, new_size: PhysicalSize<u32>) {
+        let (width, height) = self.renderer.to_grid_size(new_size);
+        if self.saved_grid_size == (width, height) {
+            trace!("Grid matched saved size, skip update.");
+            return;
         }
+        self.saved_grid_size = (width, height);
+        self.ui_command_sender
+            .send(UiCommand::Resize { width, height })
+            .ok();
     }
 
     fn handle_scale_factor_update(&mut self, scale_factor: f64) {
@@ -252,14 +257,6 @@ pub fn create_window(
 
     let scale_factor = windowed_context.window().scale_factor();
     let renderer = Renderer::new(batched_draw_command_receiver, scale_factor);
-
-    if !window.is_maximized() {
-        window.set_inner_size(get_initial_window_size((
-            renderer.font_width,
-            renderer.font_height,
-        )));
-    }
-
     let saved_inner_size = window.inner_size();
 
     let skia_renderer = SkiaRenderer::new(&windowed_context);
@@ -271,6 +268,8 @@ pub fn create_window(
         renderer.font_height,
     );
 
+    let WindowGeometry { width, height } = SETTINGS.get::<CmdLineSettings>().geometry;
+
     let mut window_wrapper = GlutinWindowWrapper {
         windowed_context,
         skia_renderer,
@@ -279,7 +278,9 @@ pub fn create_window(
         mouse_manager: MouseManager::new(ui_command_sender.clone()),
         title: String::from("Neovide"),
         fullscreen: false,
+        first_render_pass: true,
         saved_inner_size,
+        saved_grid_size: (width, height),
         ui_command_sender,
         window_command_receiver,
     };
@@ -288,7 +289,7 @@ pub fn create_window(
 
     event_loop.run(move |e, _window_target, control_flow| {
         if !running.load(Ordering::Relaxed) {
-            maybe_save_window_size(window_wrapper.saved_inner_size, &window_wrapper.renderer);
+            maybe_save_window_size(window_wrapper.saved_grid_size);
             std::process::exit(0);
         }
 
@@ -311,9 +312,3 @@ pub fn create_window(
         *control_flow = ControlFlow::WaitUntil(previous_frame_start + frame_duration)
     });
 }
-
-fn get_initial_window_size(font_dimesions: (u64, u64)) -> PhysicalSize<u32> {
-    let WindowGeometry { width, height } = SETTINGS.get::<CmdLineSettings>().geometry;
-    let (font_width, font_height) = font_dimesions;
-    PhysicalSize::new((width * font_width) as u32, (height * font_height) as u32)
-}