Open Graphic Image Writer

Documentation

You can generate Open Graphic Image dynamically.

• A CSS-like API.
• You can generate image by using template image.
• WASM/WASI support.

Problem

Currently, when you want to create OGP image dynamically, you may use canvas. But to use canvas, you need to open a browser and run some script. This has overhead for memory usage and rendering performance. Therefore this lib is targeting a high performance API for all platform(including the edge) by using wasm.

Example

For more examples, see keiya01/ogimagewriter/examples.

```rust use ogimagewriter::{style, writer::OGImageWriter}; use std::path::Path;

fn main() -> anyhow::Result<()> { let text = "This is Open Graphic Image Writer for Web Developer.";

let mut writer = OGImageWriter::new(style::WindowStyle {
    width: 1024,
    height: 512,
    background_color: Some(style::Rgba([70, 40, 90, 255])),
    align_items: style::AlignItems::Center,
    justify_content: style::JustifyContent::Center,
    ..style::WindowStyle::default()
})?;

let font = Vec::from(include_bytes!("../fonts/Mplus1-Black.ttf") as &[u8]);

writer.set_text(
    text,
    style::Style {
        margin: style::Margin(0, 20, 0, 20),
        line_height: 1.8,
        font_size: 100.,
        word_break: style::WordBreak::Normal,
        color: style::Rgba([255, 255, 255, 255]),
        text_align: style::TextAlign::Start,
        ..style::Style::default()
    },
    font,
)?;

let out_dir = "./examples";
let out_filename = "output_background_color.png";

writer.generate(Path::new(&format!("{}/{}", out_dir, out_filename)))?;

Ok(())

} ```

When you pass the following the template image,

this code generate the following image.

And you can also set background-color instead of passing the template image.

For more complex examples, see keiya01/ogimagewriter/examples.