61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
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use std::{fs::File, sync::Arc, path::Path, ffi::OsStr, io::Read};
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use image::ImageError;
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use crate::{resource_manager::ResourceStorage, texture::Texture, resource::Resource};
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use super::{LoaderError, ResourceLoader};
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impl From<ImageError> for LoaderError {
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fn from(value: ImageError) -> Self {
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LoaderError::DecodingError(anyhow::Error::from(value))
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}
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}
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/// A struct that implements the `ResourceLoader` trait used for loading textures.
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pub struct TextureLoader;
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impl ResourceLoader for TextureLoader {
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fn extensions(&self) -> &[&str] {
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&[
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// the extensions of these are the names of the formats
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"bmp", "dds", "gif", "ico", "jpeg", "jpg", "png", "qoi", "tga", "tiff", "webp",
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// farbfeld
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"ff",
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// pnm
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"pnm", "pbm", "pgm", "ppm", "pam",
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]
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}
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fn does_support_file(&self, path: &str) -> bool {
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match Path::new(path).extension().and_then(OsStr::to_str) {
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Some(ext) => {
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self.extensions().contains(&ext)
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},
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_ => false,
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}
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}
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fn load(&self, path: &str) -> Result<Arc<dyn ResourceStorage>, LoaderError> {
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// check if the file is supported by this loader
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if !self.does_support_file(path) {
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return Err(LoaderError::UnsupportedExtension(path.to_string()));
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}
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// read file bytes
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let mut file = File::open(path)?;
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let mut buf = vec![];
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file.read_to_end(&mut buf)?;
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// load the image and construct Resource<Texture>
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let image = image::load_from_memory(&buf)?;
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let texture = Texture {
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image,
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};
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let res = Resource::with_data(path, texture);
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Ok(Arc::new(res))
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}
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}
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