blade-graphics 0.1.1

use codespan_reporting::{
    diagnostic::{Diagnostic, Label},
    files::SimpleFile,
    term::{
        self,
        termcolor::{ColorChoice, StandardStream},
    },
};
use std::error::Error;

pub fn print_err(error: &dyn Error) {
    eprint!("{}", error);

    let mut e = error.source();
    if e.is_some() {
        eprintln!(": ");
    } else {
        eprintln!();
    }

    while let Some(source) = e {
        eprintln!("\t{}", source);
        e = source.source();
    }
}

pub fn emit_annotated_error<E: Error>(ann_err: &naga::WithSpan<E>, filename: &str, source: &str) {
    let files = SimpleFile::new(filename, source);
    let config = term::Config::default();
    let writer = StandardStream::stderr(ColorChoice::Auto);

    let diagnostic = Diagnostic::error().with_labels(
        ann_err
            .spans()
            .map(|(span, desc)| {
                Label::primary((), span.to_range().unwrap()).with_message(desc.to_owned())
            })
            .collect(),
    );

    term::emit(&mut writer.lock(), &config, &files, &diagnostic).expect("cannot write error");
}

impl super::TextureFormat {
    pub fn block_info(&self) -> super::TexelBlockInfo {
        fn uncompressed(size: u8) -> super::TexelBlockInfo {
            super::TexelBlockInfo {
                dimensions: (1, 1),
                size,
            }
        }
        match *self {
            Self::Rgba8Unorm => uncompressed(4),
            Self::Rgba8UnormSrgb => uncompressed(4),
            Self::Bgra8UnormSrgb => uncompressed(4),
            Self::Depth32Float => uncompressed(4),
        }
    }

    pub fn aspects(&self) -> super::TexelAspects {
        match *self {
            Self::Depth32Float => super::TexelAspects::DEPTH,
            _ => super::TexelAspects::COLOR,
        }
    }
}