use crate::{
core::assets::{
asset::{Asset, AssetID},
protocol::{AssetLoadResult, AssetProtocol, AssetVariant, Meta},
},
math::{Rect, Scalar},
};
use serde::{Deserialize, Serialize};
use std::{any::Any, collections::HashMap, str::from_utf8};
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SpriteSheetInfo {
pub meta: SpriteSheetInfoMeta,
#[serde(default)]
pub frames: HashMap<String, SpriteSheetInfoFrame>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SpriteSheetInfoMeta {
pub image: String,
#[serde(default)]
pub size: SpriteSheetInfoMetaSize,
#[serde(default)]
pub scale: String,
}
impl SpriteSheetInfoMeta {
pub fn image_name(&self) -> String {
let parts = self.image.split("://").collect::<Vec<_>>();
if parts.len() > 1 {
parts[1].to_owned()
} else {
self.image.clone()
}
}
}
#[derive(Debug, Default, Clone, Copy, Serialize, Deserialize)]
pub struct SpriteSheetInfoMetaSize {
#[serde(default)]
pub w: Scalar,
#[serde(default)]
pub h: Scalar,
}
#[derive(Debug, Default, Clone, Serialize, Deserialize)]
pub struct SpriteSheetInfoFrame {
#[serde(default)]
pub frame: Rect,
#[serde(default)]
pub rotated: bool,
#[serde(default)]
pub trimmed: bool,
#[serde(alias = "spriteSourceSize")]
#[serde(default)]
pub sprite_source_size: Rect,
#[serde(alias = "spriteSize")]
#[serde(default)]
pub source_size: SpriteSheetInfoMetaSize,
}
pub struct SpriteSheetAsset {
info: SpriteSheetInfo,
image_asset: AssetID,
}
impl SpriteSheetAsset {
pub fn info(&self) -> &SpriteSheetInfo {
&self.info
}
pub fn image_asset(&self) -> AssetID {
self.image_asset
}
}
pub struct SpriteSheetAssetProtocol;
impl AssetProtocol for SpriteSheetAssetProtocol {
fn name(&self) -> &str {
"atlas"
}
fn on_load(&mut self, data: Vec<u8>) -> AssetLoadResult {
let data = from_utf8(&data).unwrap();
let info: SpriteSheetInfo = serde_json::from_str(data).unwrap();
let image = info.meta.image.clone();
AssetLoadResult::Yield(Some(Box::new(info)), vec![("image".to_owned(), image)])
}
fn on_resume(&mut self, payload: Meta, list: &[(&str, &Asset)]) -> AssetLoadResult {
let info = *(payload.unwrap() as Box<Any + Send>)
.downcast::<SpriteSheetInfo>()
.unwrap();
let image_asset = list
.get(0)
.expect("Could not obtain sprite sheet image asset")
.1
.id();
AssetLoadResult::Data(Box::new(SpriteSheetAsset { info, image_asset }))
}
fn on_unload(&mut self, asset: &Asset) -> Option<Vec<AssetVariant>> {
if let Some(asset) = asset.get::<SpriteSheetAsset>() {
Some(vec![AssetVariant::Id(asset.image_asset)])
} else {
None
}
}
}