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refactor(image cache): 🔥 remove TextureLoader and add BytesLoader ins…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| // Copyright (C) 2023 Lily Lyons | ||
| // | ||
| // This file is part of Luminol. | ||
| // | ||
| // Luminol is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // Luminol is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with Luminol. If not, see <http://www.gnu.org/licenses/>. | ||
| // | ||
| // Additional permission under GNU GPL version 3 section 7 | ||
| // | ||
| // If you modify this Program, or any covered work, by linking or combining | ||
| // it with Steamworks API by Valve Corporation, containing parts covered by | ||
| // terms of the Steamworks API by Valve Corporation, the licensors of this | ||
| // Program grant you additional permission to convey the resulting work. | ||
|
|
||
| use std::sync::Arc; | ||
|
|
||
| use dashmap::{DashMap, DashSet}; | ||
| use egui::load::{Bytes, BytesPoll, LoadError}; | ||
|
|
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| use crate::Error; | ||
|
|
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| #[derive(Default)] | ||
| pub struct Loader { | ||
| loaded_files: DashMap<camino::Utf8PathBuf, Arc<[u8]>>, | ||
| errored_files: DashMap<camino::Utf8PathBuf, Error>, | ||
| unloaded_files: DashSet<camino::Utf8PathBuf>, | ||
| } | ||
|
|
||
| pub const BYTES_LOADER_ID: &str = egui::load::generate_loader_id!(BytesLoader); | ||
|
|
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| pub const PROTOCOL: &str = "project://"; | ||
|
|
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| fn supported_uri_to_path(uri: &str) -> Option<&camino::Utf8Path> { | ||
| uri.strip_prefix(PROTOCOL).map(camino::Utf8Path::new) | ||
| } | ||
|
|
||
| impl Loader { | ||
| pub fn new() -> Self { | ||
| Self::default() | ||
| } | ||
|
|
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| pub fn load_unloaded_files(&self, ctx: &egui::Context, filesystem: &impl crate::FileSystem) { | ||
| // dashmap has no drain iterator unfortunately so this is the best we can do | ||
| for path in self.unloaded_files.iter() { | ||
| let path = path.to_path_buf(); | ||
| match filesystem.read(&path) { | ||
| Ok(bytes) => { | ||
| self.loaded_files.insert(path, bytes.into()); | ||
| } | ||
| Err(err) => { | ||
| self.errored_files.insert(path, err); | ||
| } | ||
| }; | ||
| } | ||
| if !self.unloaded_files.is_empty() { | ||
| ctx.request_repaint(); | ||
| } | ||
| self.unloaded_files.clear(); | ||
| } | ||
| } | ||
|
|
||
| impl egui::load::BytesLoader for Loader { | ||
| fn id(&self) -> &str { | ||
| BYTES_LOADER_ID | ||
| } | ||
|
|
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| fn load(&self, _: &egui::Context, uri: &str) -> egui::load::BytesLoadResult { | ||
| let Some(path) = supported_uri_to_path(uri) else { | ||
| return Err(LoadError::NotSupported); | ||
| }; | ||
|
|
||
| if let Some(bytes) = self.loaded_files.get(path) { | ||
| return Ok(BytesPoll::Ready { | ||
| size: None, | ||
| bytes: Bytes::Shared(bytes.clone()), | ||
| mime: None, | ||
| }); | ||
| } | ||
|
|
||
| if let Some(error) = self.errored_files.get(path) { | ||
| return Err(LoadError::Loading(error.to_string())); | ||
| } | ||
|
|
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| self.unloaded_files.insert(path.to_path_buf()); | ||
| Ok(BytesPoll::Pending { size: None }) | ||
| } | ||
|
|
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| fn forget(&self, uri: &str) { | ||
| let Some(path) = supported_uri_to_path(uri) else { | ||
| return; | ||
| }; | ||
|
|
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| self.loaded_files.remove(path); | ||
| self.errored_files.remove(path); | ||
| self.unloaded_files.remove(path); | ||
| } | ||
|
|
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| fn forget_all(&self) { | ||
| self.loaded_files.clear(); | ||
| self.errored_files.clear(); | ||
| self.unloaded_files.clear(); | ||
| } | ||
|
|
||
| fn byte_size(&self) -> usize { | ||
| self.loaded_files.iter().map(|e| e.len()).sum() | ||
| } | ||
| } |
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