71 lines
2.2 KiB
Rust
71 lines
2.2 KiB
Rust
//! Helper functions for the UI, mostly pixbuf functions.
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use errors::*;
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use gdk_pixbuf;
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use gtk::prelude::*;
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use gtk;
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use std::path::*;
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/// Get a pixbuf by name from the given theme with the requested size.
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/// Note that the size is not enforced, but rather a hint.
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pub fn pixbuf_new_from_theme(
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icon_name: &str,
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size: i32,
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theme: >k::IconTheme,
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) -> Result<gdk_pixbuf::Pixbuf> {
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let icon_info = theme
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.lookup_icon(icon_name, size, gtk::IconLookupFlags::empty())
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.ok_or(format!("Couldn't find icon {}", icon_name))?;
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debug!(
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"Loading stock icon {} from {:?}",
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icon_name,
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icon_info.get_filename().unwrap_or(PathBuf::new())
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);
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// TODO: propagate error
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let pixbuf = icon_info.load_icon().unwrap();
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return Ok(pixbuf);
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}
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#[macro_export]
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/// Create a pixbuf from the given PNG file. Includes the file as bytes
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/// in the binary and decodes it.
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macro_rules! pixbuf_new_from_png {
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($name:expr) => {
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{
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use gdk_pixbuf;
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use png;
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let bytes = include_bytes!($name);
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let pixbuf_new_from_bytes = |bytes| -> Result<gdk_pixbuf::Pixbuf> {
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let decoder = png::Decoder::new(bytes);
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let (info, mut reader) = decoder.read_info()?;
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let mut buf = vec![0; info.buffer_size()];
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reader.next_frame(&mut buf).unwrap();
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ensure!(info.color_type == png::ColorType::RGB ||
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info.color_type == png::ColorType::RGBA,
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"Only RGB is supported for GDKPixbuf");
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debug!("Loading icon from {}", $name);
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return Ok(gdk_pixbuf::Pixbuf::new_from_vec(buf,
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gdk_pixbuf_sys::GDK_COLORSPACE_RGB,
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true,
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info.bit_depth as i32,
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info.width as i32,
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info.height as i32,
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info.line_size as i32));
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};
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pixbuf_new_from_bytes(bytes as &[u8])
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}
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}
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}
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