Text rendering cuts off whole words in some cases

[Kaiden42]

Hello, I noticed that the text rendering cuts off whole words. It seems that the width of the characters is not calculated correctly. Maybe a rounding mistake?

Here is a small example, using the latest master, to reproduce this behavior:

use iced::{Column, Container, Length, Sandbox, Settings, Text};

fn main() -> iced::Result {
    TextBug::run(Settings::default())
}

struct TextBug {}

#[derive(Debug)]
enum Message {}

impl Sandbox for TextBug {
    type Message = Message;
    fn new() -> Self { TextBug {} }
    fn title(&self) -> String { "TextBug".into() }
    fn update(&mut self, _message: Self::Message) {}
    fn view(&mut self) -> iced::Element<'_, Self::Message> {
        Container::new(
            Column::new()
                .push(Text::new("Toggle Word Wrap"))
                .push(Text::new("Toggle Word wrap"))
                .push(Text::new("Toggle Wörd Wräp"))
                .push(Text::new("Toggle Wird Wrap"))
                .push(Text::new("Toggle Word Wrip"))
                .push(Text::new("Toggle Word? Wrap"))
                .push(Text::new("Toggle Word Wrap?"))
        )
        .width(Length::Fill)
        .height(Length::Fill)
        .center_x()
        .center_y()
        .into()
    }
}

[hecrj]

I can reproduce the issue on Linux if I manually set a WINIT_SCALE_FACTOR of 2.0 and use the default system font.

Most likely, this is related to this TODO:

https://github.com/hecrj/iced/blob/0333a8daff6db989adc6035a4c09df171a86f6fe/wgpu/src/backend.rs#L176-L184

[lufte]

I'm hitting this issue when using an italic font on linux, with everything else set on default values. Any workaround you know of?

[IohannRabeson]

Hi, I'm hitting this issue on OSX and Windows as well.
You can see it does not happen with any text. In the following screenshot, the second file name only file2.txt is missing.

I can confirm I get the same behavior with this code on OSX (Catalina) and on Windows.

https://gist.github.com/IohannRabeson/d3f6ed5436e392da8a4f730573c8aeb3

[GyulyVGC]

I had this problem when using a font different from the default one. Setting the font used as default font solved the issue in my case. I think this could be due to iced calculating the width basing on the default font width (maybe?).

I'll leave this comment here in case it can be of any help.

[hecrj]

Fixed by #1921.