make pixels_per_point optional in RawInput (default 1)

emigui/src/input.rs

@@ -21,7 +21,7 @@ pub struct RawInput {
     pub screen_size: Vec2,
 
     /// Also known as device pixel ratio, > 1 for HDPI screens.
-    pub pixels_per_point: f32,
+    pub pixels_per_point: Option<f32>,
 
     /// Time in seconds. Relative to whatever. Used for animation.
     pub time: f64,
@@ -165,7 +165,7 @@ impl GuiInput {
             mouse_velocity,
             scroll_delta: new.scroll_delta,
             screen_size: new.screen_size,
-            pixels_per_point: new.pixels_per_point,
+            pixels_per_point: new.pixels_per_point.unwrap_or(1.0),
             time: new.time,
             dt,
             seconds_since_midnight: new.seconds_since_midnight,
@@ -186,7 +186,7 @@ impl RawInput {
         ui.add(label!("mouse_pos: {:.1?}", self.mouse_pos));
         ui.add(label!("scroll_delta: {:?}", self.scroll_delta));
         ui.add(label!("screen_size: {:?}", self.screen_size));
-        ui.add(label!("pixels_per_point: {}", self.pixels_per_point));
+        ui.add(label!("pixels_per_point: {:?}", self.pixels_per_point));
         ui.add(label!("time: {:.3} s", self.time));
         ui.add(label!("events: {:?}", self.events));
         ui.add(label!("dropped_files: {:?}", self.dropped_files));

example_glium/src/main.rs

@@ -72,7 +72,7 @@ fn main() {
             let (width, height) = display.get_framebuffer_dimensions();
             vec2(width as f32, height as f32) / pixels_per_point
         },
-        pixels_per_point,
+        pixels_per_point: Some(pixels_per_point),
         ..Default::default()
     };
 

example_wasm/src/lib.rs

@@ -37,7 +37,6 @@ impl State {
     fn run(&mut self, raw_input: RawInput) -> Result<Output, JsValue> {
         let everything_start = now_sec();
 
-        let pixels_per_point = raw_input.pixels_per_point;
         self.ctx.begin_frame(raw_input);
 
         let mut ui = self.ctx.fullscreen_ui();
@@ -87,7 +86,7 @@ impl State {
             bg_color,
             batches,
             self.ctx.texture(),
-            pixels_per_point,
+            self.ctx.pixels_per_point(),
         )?;
 
         emigui_wasm::save_memory(&self.ctx); // TODO: don't save every frame