4796ea8d22
The `Texture::convert` function previously was only compiled when one of the image format features (`png`, `jpeg` etc.) were enabled. The `bevy_sprite` crate needs this function though, which led to compilation errors when using `cargo check --no-default-features --features render`. Now the `convert` function has no features and the `texture_to_image` and `image_to_texture` utilites functions are in an unconditionally compiled module.
63 lines
1.9 KiB
Rust
63 lines
1.9 KiB
Rust
use super::image_texture_conversion::image_to_texture;
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use anyhow::Result;
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use bevy_asset::{AssetLoader, LoadContext, LoadedAsset};
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use bevy_utils::BoxedFuture;
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/// Loader for images that can be read by the `image` crate.
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#[derive(Clone, Default)]
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pub struct ImageTextureLoader;
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const FILE_EXTENSIONS: &[&str] = &["png", "dds", "tga", "jpg", "jpeg", "bmp"];
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impl AssetLoader for ImageTextureLoader {
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fn load<'a>(
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&'a self,
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bytes: &'a [u8],
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load_context: &'a mut LoadContext,
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) -> BoxedFuture<'a, Result<()>> {
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Box::pin(async move {
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// Find the image type we expect. A file with the extension "png" should
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// probably load as a PNG.
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let ext = load_context.path().extension().unwrap().to_str().unwrap();
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let img_format = image::ImageFormat::from_extension(ext)
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.ok_or_else(|| {
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format!(
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"Unexpected image format {:?} for file {}, this is an error in `bevy_render`.",
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ext,
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load_context.path().display()
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)
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})
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.unwrap();
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// Load the image in the expected format.
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// Some formats like PNG allow for R or RG textures too, so the texture
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// format needs to be determined. For RGB textures an alpha channel
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// needs to be added, so the image data needs to be converted in those
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// cases.
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let dyn_img = image::load_from_memory_with_format(bytes, img_format)?;
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load_context.set_default_asset(LoadedAsset::new(image_to_texture(dyn_img)));
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Ok(())
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})
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}
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fn extensions(&self) -> &[&str] {
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FILE_EXTENSIONS
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_supported_file_extensions() {
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for ext in FILE_EXTENSIONS {
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assert!(image::ImageFormat::from_extension(ext).is_some())
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}
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}
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}
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