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import { LinearFilter } from '../constants.js';
import { FileLoader } from './FileLoader.js';
import { CompressedTexture } from '../textures/CompressedTexture.js';
import { DefaultLoadingManager } from './LoadingManager.js';
/**
* @author mrdoob / http://mrdoob.com/
*
* Abstract Base class to block based textures loader (dds, pvr, ...)
*/
function CompressedTextureLoader( manager ) {
this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
// override in sub classes
this._parser = null;
}
Object.assign( CompressedTextureLoader.prototype, {
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var images = [];
var texture = new CompressedTexture();
texture.image = images;
var loader = new FileLoader( this.manager );
loader.setPath( this.path );
loader.setResponseType( 'arraybuffer' );
function loadTexture( i ) {
loader.load( url[ i ], function ( buffer ) {
var texDatas = scope._parser( buffer, true );
images[ i ] = {
width: texDatas.width,
height: texDatas.height,
format: texDatas.format,
mipmaps: texDatas.mipmaps
};
loaded += 1;
if ( loaded === 6 ) {
if ( texDatas.mipmapCount === 1 )
texture.minFilter = LinearFilter;
texture.format = texDatas.format;
texture.needsUpdate = true;
if ( onLoad ) onLoad( texture );
}
}, onProgress, onError );
}
if ( Array.isArray( url ) ) {
var loaded = 0;
for ( var i = 0, il = url.length; i < il; ++ i ) {
loadTexture( i );
}
} else {
// compressed cubemap texture stored in a single DDS file
loader.load( url, function ( buffer ) {
var texDatas = scope._parser( buffer, true );
if ( texDatas.isCubemap ) {
var faces = texDatas.mipmaps.length / texDatas.mipmapCount;
for ( var f = 0; f < faces; f ++ ) {
images[ f ] = { mipmaps: [] };
for ( var i = 0; i < texDatas.mipmapCount; i ++ ) {
images[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );
images[ f ].format = texDatas.format;
images[ f ].width = texDatas.width;
images[ f ].height = texDatas.height;
}
}
} else {
texture.image.width = texDatas.width;
texture.image.height = texDatas.height;
texture.mipmaps = texDatas.mipmaps;
}
if ( texDatas.mipmapCount === 1 ) {
texture.minFilter = LinearFilter;
}
texture.format = texDatas.format;
texture.needsUpdate = true;
if ( onLoad ) onLoad( texture );
}, onProgress, onError );
}
return texture;
},
setPath: function ( value ) {
this.path = value;
return this;
}
} );
export { CompressedTextureLoader };
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