implement image preview

This commit is contained in:
CodeSteak 2019-05-09 20:13:15 +02:00
parent c7eff9080b
commit 89b2b480ce
3 changed files with 45 additions and 31 deletions

View File

@ -1,19 +1,23 @@
// TODO: remove on implementation
#![allow(unused_imports)]
#![allow(unused_variables)]
#![allow(dead_code)]
use crate::model::*;
use ::image::*;
pub struct ConvertConfig {
pub desired_size: (usize, usize),
// TODO: Deside on ::image::FilterType;
// TODO: Think about size; Hard Code??
const RESIZE: u32 = 256;
pub fn generate_preview(input: &[u8], format: TextureFormat) -> ImageResult<Vec<u8>> {
// Yes, this guesses the format :D
// Also the resize function takes a maximum size and preservs the ratio.
let img =
::image::load_from_memory(input)?.resize(RESIZE, RESIZE, ::image::FilterType::Lanczos3);
let mut out: Vec<u8> = Vec::new();
match format {
TextureFormat::JPEG => img.write_to(&mut out, ImageOutputFormat::JPEG(95))?,
TextureFormat::PNG => img.write_to(&mut out, ImageOutputFormat::PNG)?,
}
pub fn generate_preview(
input: &[u8],
format: TextureFormat,
config: &ConvertConfig,
) -> ::image::ImageResult<Vec<u8>> {
unimplemented!()
Ok(out)
}

View File

@ -7,6 +7,7 @@ use std::path::{Path, PathBuf};
mod image_convert;
mod metadata_file;
/*
pub type TextureFileResult = Result<Vec<u8>, TextureFileError>;
pub enum TextureFileError {
NotFound,
@ -25,6 +26,7 @@ impl From<::image::ImageError> for TextureFileError {
TextureFileError::ImageError(err)
}
}
*/
pub struct DataStore {
//data_path: PathBuf,
@ -35,7 +37,7 @@ pub struct DataStore {
id_index: HashMap<String, Texture>,
name_index: HashMap<String, Texture>,
_preview_cache: HashMap<(TextureFormat, Sha256), Vec<u8>>,
preview_cache: HashMap<(TextureFormat, Sha256), Vec<u8>>,
}
impl DataStore {
@ -65,7 +67,7 @@ impl DataStore {
id_index: Default::default(),
name_index: Default::default(),
_preview_cache: Default::default(),
preview_cache: Default::default(),
};
let metadata_file = metadata_file::MetadataFile::load(&store.index_file_path())?;
@ -172,10 +174,25 @@ impl DataStore {
pub fn get_texture_preview(
&mut self,
_hash: &Sha256,
_desired_format: TextureFormat,
) -> TextureFileResult {
unimplemented!();
hash: &Sha256,
desired_format: TextureFormat,
) -> io::Result<Vec<u8>> {
let key = (desired_format.clone(), hash.clone());
if let Some(preview) = self.preview_cache.get(&key) {
return Ok(preview.clone());
}
let original = self.read_texture_file_by_hash(&hash)?;
let preview =
image_convert::generate_preview(&original[..], desired_format).map_err(|_e| {
io::Error::new(io::ErrorKind::InvalidData, "Invalid Texture Image on Disk.")
})?;
self.preview_cache.insert(key, preview.clone());
Ok(preview)
}
pub fn borrow_textures(&self) -> impl Iterator<Item = &Texture> {

View File

@ -56,16 +56,9 @@ impl ProtocolHandler for ServerState {
) -> ProtocolResult<Vec<u8>> {
let mut data_store = self.data_store.write().unwrap();
match data_store.get_texture_preview(&hash, format) {
Ok(data) => Ok(data),
Err(TextureFileError::NotFound) => Err(ProtocolError::FileNotFound(
"Texture not found!".to_string(),
)),
Err(TextureFileError::ImageError(_)) => Err(ProtocolError::FileNotFound(
"Didn't Find valid Texture File".to_string(),
)),
Err(TextureFileError::IoError(err)) => Err(ProtocolError::InternalServerError(err)),
}
let preview = data_store.get_texture_preview(&hash, format)?;
Ok(preview)
}
fn replace_texture(