You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
736 lines
19 KiB
736 lines
19 KiB
2 years ago
|
( function () {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* THREE.Loader for Basis Universal GPU Texture Codec.
|
||
|
|
*
|
||
|
|
* Basis Universal is a "supercompressed" GPU texture and texture video
|
||
|
|
* compression system that outputs a highly compressed intermediate file format
|
||
|
|
* (.basis) that can be quickly transcoded to a wide variety of GPU texture
|
||
|
|
* compression formats.
|
||
|
|
*
|
||
|
|
* This loader parallelizes the transcoding process across a configurable number
|
||
|
|
* of web workers, before transferring the transcoded compressed texture back
|
||
|
|
* to the main thread.
|
||
|
|
*/
|
||
|
|
|
||
|
|
const _taskCache = new WeakMap();
|
||
|
|
|
||
|
|
class BasisTextureLoader extends THREE.Loader {
|
||
|
|
|
||
|
|
constructor( manager ) {
|
||
|
|
|
||
|
|
super( manager );
|
||
|
|
this.transcoderPath = '';
|
||
|
|
this.transcoderBinary = null;
|
||
|
|
this.transcoderPending = null;
|
||
|
|
this.workerLimit = 4;
|
||
|
|
this.workerPool = [];
|
||
|
|
this.workerNextTaskID = 1;
|
||
|
|
this.workerSourceURL = '';
|
||
|
|
this.workerConfig = null;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
setTranscoderPath( path ) {
|
||
|
|
|
||
|
|
this.transcoderPath = path;
|
||
|
|
return this;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
setWorkerLimit( workerLimit ) {
|
||
|
|
|
||
|
|
this.workerLimit = workerLimit;
|
||
|
|
return this;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
detectSupport( renderer ) {
|
||
|
|
|
||
|
|
this.workerConfig = {
|
||
|
|
astcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_astc' ),
|
||
|
|
etc1Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc1' ),
|
||
|
|
etc2Supported: renderer.extensions.has( 'WEBGL_compressed_texture_etc' ),
|
||
|
|
dxtSupported: renderer.extensions.has( 'WEBGL_compressed_texture_s3tc' ),
|
||
|
|
bptcSupported: renderer.extensions.has( 'EXT_texture_compression_bptc' ),
|
||
|
|
pvrtcSupported: renderer.extensions.has( 'WEBGL_compressed_texture_pvrtc' ) || renderer.extensions.has( 'WEBKIT_WEBGL_compressed_texture_pvrtc' )
|
||
|
|
};
|
||
|
|
return this;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
load( url, onLoad, onProgress, onError ) {
|
||
|
|
|
||
|
|
const loader = new THREE.FileLoader( this.manager );
|
||
|
|
loader.setResponseType( 'arraybuffer' );
|
||
|
|
loader.setWithCredentials( this.withCredentials );
|
||
|
|
const texture = new THREE.CompressedTexture();
|
||
|
|
loader.load( url, buffer => {
|
||
|
|
|
||
|
|
// Check for an existing task using this buffer. A transferred buffer cannot be transferred
|
||
|
|
// again from this thread.
|
||
|
|
if ( _taskCache.has( buffer ) ) {
|
||
|
|
|
||
|
|
const cachedTask = _taskCache.get( buffer );
|
||
|
|
|
||
|
|
return cachedTask.promise.then( onLoad ).catch( onError );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
this._createTexture( [ buffer ] ).then( function ( _texture ) {
|
||
|
|
|
||
|
|
texture.copy( _texture );
|
||
|
|
texture.needsUpdate = true;
|
||
|
|
if ( onLoad ) onLoad( texture );
|
||
|
|
|
||
|
|
} ).catch( onError );
|
||
|
|
|
||
|
|
}, onProgress, onError );
|
||
|
|
return texture;
|
||
|
|
|
||
|
|
}
|
||
|
|
/** Low-level transcoding API, exposed for use by KTX2Loader. */
|
||
|
|
|
||
|
|
|
||
|
|
parseInternalAsync( options ) {
|
||
|
|
|
||
|
|
const {
|
||
|
|
levels
|
||
|
|
} = options;
|
||
|
|
const buffers = new Set();
|
||
|
|
|
||
|
|
for ( let i = 0; i < levels.length; i ++ ) {
|
||
|
|
|
||
|
|
buffers.add( levels[ i ].data.buffer );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return this._createTexture( Array.from( buffers ), { ...options,
|
||
|
|
lowLevel: true
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @param {ArrayBuffer[]} buffers
|
||
|
|
* @param {object?} config
|
||
|
|
* @return {Promise<CompressedTexture>}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
_createTexture( buffers, config = {} ) {
|
||
|
|
|
||
|
|
let worker;
|
||
|
|
let taskID;
|
||
|
|
const taskConfig = config;
|
||
|
|
let taskCost = 0;
|
||
|
|
|
||
|
|
for ( let i = 0; i < buffers.length; i ++ ) {
|
||
|
|
|
||
|
|
taskCost += buffers[ i ].byteLength;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const texturePending = this._allocateWorker( taskCost ).then( _worker => {
|
||
|
|
|
||
|
|
worker = _worker;
|
||
|
|
taskID = this.workerNextTaskID ++;
|
||
|
|
return new Promise( ( resolve, reject ) => {
|
||
|
|
|
||
|
|
worker._callbacks[ taskID ] = {
|
||
|
|
resolve,
|
||
|
|
reject
|
||
|
|
};
|
||
|
|
worker.postMessage( {
|
||
|
|
type: 'transcode',
|
||
|
|
id: taskID,
|
||
|
|
buffers: buffers,
|
||
|
|
taskConfig: taskConfig
|
||
|
|
}, buffers );
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
} ).then( message => {
|
||
|
|
|
||
|
|
const {
|
||
|
|
mipmaps,
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
format
|
||
|
|
} = message;
|
||
|
|
const texture = new THREE.CompressedTexture( mipmaps, width, height, format, THREE.UnsignedByteType );
|
||
|
|
texture.minFilter = mipmaps.length === 1 ? THREE.LinearFilter : THREE.LinearMipmapLinearFilter;
|
||
|
|
texture.magFilter = THREE.LinearFilter;
|
||
|
|
texture.generateMipmaps = false;
|
||
|
|
texture.needsUpdate = true;
|
||
|
|
return texture;
|
||
|
|
|
||
|
|
} ); // Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
|
||
|
|
|
||
|
|
|
||
|
|
texturePending.catch( () => true ).then( () => {
|
||
|
|
|
||
|
|
if ( worker && taskID ) {
|
||
|
|
|
||
|
|
worker._taskLoad -= taskCost;
|
||
|
|
delete worker._callbacks[ taskID ];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
} ); // Cache the task result.
|
||
|
|
|
||
|
|
_taskCache.set( buffers[ 0 ], {
|
||
|
|
promise: texturePending
|
||
|
|
} );
|
||
|
|
|
||
|
|
return texturePending;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
_initTranscoder() {
|
||
|
|
|
||
|
|
if ( ! this.transcoderPending ) {
|
||
|
|
|
||
|
|
// Load transcoder wrapper.
|
||
|
|
const jsLoader = new THREE.FileLoader( this.manager );
|
||
|
|
jsLoader.setPath( this.transcoderPath );
|
||
|
|
jsLoader.setWithCredentials( this.withCredentials );
|
||
|
|
const jsContent = new Promise( ( resolve, reject ) => {
|
||
|
|
|
||
|
|
jsLoader.load( 'basis_transcoder.js', resolve, undefined, reject );
|
||
|
|
|
||
|
|
} ); // Load transcoder WASM binary.
|
||
|
|
|
||
|
|
const binaryLoader = new THREE.FileLoader( this.manager );
|
||
|
|
binaryLoader.setPath( this.transcoderPath );
|
||
|
|
binaryLoader.setResponseType( 'arraybuffer' );
|
||
|
|
binaryLoader.setWithCredentials( this.withCredentials );
|
||
|
|
const binaryContent = new Promise( ( resolve, reject ) => {
|
||
|
|
|
||
|
|
binaryLoader.load( 'basis_transcoder.wasm', resolve, undefined, reject );
|
||
|
|
|
||
|
|
} );
|
||
|
|
this.transcoderPending = Promise.all( [ jsContent, binaryContent ] ).then( ( [ jsContent, binaryContent ] ) => {
|
||
|
|
|
||
|
|
const fn = BasisTextureLoader.BasisWorker.toString();
|
||
|
|
const body = [ '/* constants */', 'let _EngineFormat = ' + JSON.stringify( BasisTextureLoader.EngineFormat ), 'let _TranscoderFormat = ' + JSON.stringify( BasisTextureLoader.TranscoderFormat ), 'let _BasisFormat = ' + JSON.stringify( BasisTextureLoader.BasisFormat ), '/* basis_transcoder.js */', jsContent, '/* worker */', fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) ) ].join( '\n' );
|
||
|
|
this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
|
||
|
|
this.transcoderBinary = binaryContent;
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return this.transcoderPending;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
_allocateWorker( taskCost ) {
|
||
|
|
|
||
|
|
return this._initTranscoder().then( () => {
|
||
|
|
|
||
|
|
if ( this.workerPool.length < this.workerLimit ) {
|
||
|
|
|
||
|
|
const worker = new Worker( this.workerSourceURL );
|
||
|
|
worker._callbacks = {};
|
||
|
|
worker._taskLoad = 0;
|
||
|
|
worker.postMessage( {
|
||
|
|
type: 'init',
|
||
|
|
config: this.workerConfig,
|
||
|
|
transcoderBinary: this.transcoderBinary
|
||
|
|
} );
|
||
|
|
|
||
|
|
worker.onmessage = function ( e ) {
|
||
|
|
|
||
|
|
const message = e.data;
|
||
|
|
|
||
|
|
switch ( message.type ) {
|
||
|
|
|
||
|
|
case 'transcode':
|
||
|
|
worker._callbacks[ message.id ].resolve( message );
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'error':
|
||
|
|
worker._callbacks[ message.id ].reject( message );
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
console.error( 'THREE.BasisTextureLoader: Unexpected message, "' + message.type + '"' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
this.workerPool.push( worker );
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
this.workerPool.sort( function ( a, b ) {
|
||
|
|
|
||
|
|
return a._taskLoad > b._taskLoad ? - 1 : 1;
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const worker = this.workerPool[ this.workerPool.length - 1 ];
|
||
|
|
worker._taskLoad += taskCost;
|
||
|
|
return worker;
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
dispose() {
|
||
|
|
|
||
|
|
for ( let i = 0; i < this.workerPool.length; i ++ ) {
|
||
|
|
|
||
|
|
this.workerPool[ i ].terminate();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
this.workerPool.length = 0;
|
||
|
|
return this;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
/* CONSTANTS */
|
||
|
|
|
||
|
|
|
||
|
|
BasisTextureLoader.BasisFormat = {
|
||
|
|
ETC1S: 0,
|
||
|
|
UASTC_4x4: 1
|
||
|
|
};
|
||
|
|
BasisTextureLoader.TranscoderFormat = {
|
||
|
|
ETC1: 0,
|
||
|
|
ETC2: 1,
|
||
|
|
BC1: 2,
|
||
|
|
BC3: 3,
|
||
|
|
BC4: 4,
|
||
|
|
BC5: 5,
|
||
|
|
BC7_M6_OPAQUE_ONLY: 6,
|
||
|
|
BC7_M5: 7,
|
||
|
|
PVRTC1_4_RGB: 8,
|
||
|
|
PVRTC1_4_RGBA: 9,
|
||
|
|
ASTC_4x4: 10,
|
||
|
|
ATC_RGB: 11,
|
||
|
|
ATC_RGBA_INTERPOLATED_ALPHA: 12,
|
||
|
|
RGBA32: 13,
|
||
|
|
RGB565: 14,
|
||
|
|
BGR565: 15,
|
||
|
|
RGBA4444: 16
|
||
|
|
};
|
||
|
|
BasisTextureLoader.EngineFormat = {
|
||
|
|
RGBAFormat: THREE.RGBAFormat,
|
||
|
|
RGBA_ASTC_4x4_Format: THREE.RGBA_ASTC_4x4_Format,
|
||
|
|
RGBA_BPTC_Format: THREE.RGBA_BPTC_Format,
|
||
|
|
RGBA_ETC2_EAC_Format: THREE.RGBA_ETC2_EAC_Format,
|
||
|
|
RGBA_PVRTC_4BPPV1_Format: THREE.RGBA_PVRTC_4BPPV1_Format,
|
||
|
|
RGBA_S3TC_DXT5_Format: THREE.RGBA_S3TC_DXT5_Format,
|
||
|
|
RGB_ETC1_Format: THREE.RGB_ETC1_Format,
|
||
|
|
RGB_ETC2_Format: THREE.RGB_ETC2_Format,
|
||
|
|
RGB_PVRTC_4BPPV1_Format: THREE.RGB_PVRTC_4BPPV1_Format,
|
||
|
|
RGB_S3TC_DXT1_Format: THREE.RGB_S3TC_DXT1_Format
|
||
|
|
};
|
||
|
|
/* WEB WORKER */
|
||
|
|
|
||
|
|
BasisTextureLoader.BasisWorker = function () {
|
||
|
|
|
||
|
|
let config;
|
||
|
|
let transcoderPending;
|
||
|
|
let BasisModule;
|
||
|
|
const EngineFormat = _EngineFormat; // eslint-disable-line no-undef
|
||
|
|
|
||
|
|
const TranscoderFormat = _TranscoderFormat; // eslint-disable-line no-undef
|
||
|
|
|
||
|
|
const BasisFormat = _BasisFormat; // eslint-disable-line no-undef
|
||
|
|
|
||
|
|
onmessage = function ( e ) {
|
||
|
|
|
||
|
|
const message = e.data;
|
||
|
|
|
||
|
|
switch ( message.type ) {
|
||
|
|
|
||
|
|
case 'init':
|
||
|
|
config = message.config;
|
||
|
|
init( message.transcoderBinary );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'transcode':
|
||
|
|
transcoderPending.then( () => {
|
||
|
|
|
||
|
|
try {
|
||
|
|
|
||
|
|
const {
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
hasAlpha,
|
||
|
|
mipmaps,
|
||
|
|
format
|
||
|
|
} = message.taskConfig.lowLevel ? transcodeLowLevel( message.taskConfig ) : transcode( message.buffers[ 0 ] );
|
||
|
|
const buffers = [];
|
||
|
|
|
||
|
|
for ( let i = 0; i < mipmaps.length; ++ i ) {
|
||
|
|
|
||
|
|
buffers.push( mipmaps[ i ].data.buffer );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
self.postMessage( {
|
||
|
|
type: 'transcode',
|
||
|
|
id: message.id,
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
hasAlpha,
|
||
|
|
mipmaps,
|
||
|
|
format
|
||
|
|
}, buffers );
|
||
|
|
|
||
|
|
} catch ( error ) {
|
||
|
|
|
||
|
|
console.error( error );
|
||
|
|
self.postMessage( {
|
||
|
|
type: 'error',
|
||
|
|
id: message.id,
|
||
|
|
error: error.message
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
} );
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
function init( wasmBinary ) {
|
||
|
|
|
||
|
|
transcoderPending = new Promise( resolve => {
|
||
|
|
|
||
|
|
BasisModule = {
|
||
|
|
wasmBinary,
|
||
|
|
onRuntimeInitialized: resolve
|
||
|
|
};
|
||
|
|
BASIS( BasisModule ); // eslint-disable-line no-undef
|
||
|
|
|
||
|
|
} ).then( () => {
|
||
|
|
|
||
|
|
BasisModule.initializeBasis();
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function transcodeLowLevel( taskConfig ) {
|
||
|
|
|
||
|
|
const {
|
||
|
|
basisFormat,
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
hasAlpha
|
||
|
|
} = taskConfig;
|
||
|
|
const {
|
||
|
|
transcoderFormat,
|
||
|
|
engineFormat
|
||
|
|
} = getTranscoderFormat( basisFormat, width, height, hasAlpha );
|
||
|
|
const blockByteLength = BasisModule.getBytesPerBlockOrPixel( transcoderFormat );
|
||
|
|
assert( BasisModule.isFormatSupported( transcoderFormat ), 'THREE.BasisTextureLoader: Unsupported format.' );
|
||
|
|
const mipmaps = [];
|
||
|
|
|
||
|
|
if ( basisFormat === BasisFormat.ETC1S ) {
|
||
|
|
|
||
|
|
const transcoder = new BasisModule.LowLevelETC1SImageTranscoder();
|
||
|
|
const {
|
||
|
|
endpointCount,
|
||
|
|
endpointsData,
|
||
|
|
selectorCount,
|
||
|
|
selectorsData,
|
||
|
|
tablesData
|
||
|
|
} = taskConfig.globalData;
|
||
|
|
|
||
|
|
try {
|
||
|
|
|
||
|
|
let ok;
|
||
|
|
ok = transcoder.decodePalettes( endpointCount, endpointsData, selectorCount, selectorsData );
|
||
|
|
assert( ok, 'THREE.BasisTextureLoader: decodePalettes() failed.' );
|
||
|
|
ok = transcoder.decodeTables( tablesData );
|
||
|
|
assert( ok, 'THREE.BasisTextureLoader: decodeTables() failed.' );
|
||
|
|
|
||
|
|
for ( let i = 0; i < taskConfig.levels.length; i ++ ) {
|
||
|
|
|
||
|
|
const level = taskConfig.levels[ i ];
|
||
|
|
const imageDesc = taskConfig.globalData.imageDescs[ i ];
|
||
|
|
const dstByteLength = getTranscodedImageByteLength( transcoderFormat, level.width, level.height );
|
||
|
|
const dst = new Uint8Array( dstByteLength );
|
||
|
|
ok = transcoder.transcodeImage( transcoderFormat, dst, dstByteLength / blockByteLength, level.data, getWidthInBlocks( transcoderFormat, level.width ), getHeightInBlocks( transcoderFormat, level.height ), level.width, level.height, level.index, imageDesc.rgbSliceByteOffset, imageDesc.rgbSliceByteLength, imageDesc.alphaSliceByteOffset, imageDesc.alphaSliceByteLength, imageDesc.imageFlags, hasAlpha, false, 0, 0 );
|
||
|
|
assert( ok, 'THREE.BasisTextureLoader: transcodeImage() failed for level ' + level.index + '.' );
|
||
|
|
mipmaps.push( {
|
||
|
|
data: dst,
|
||
|
|
width: level.width,
|
||
|
|
height: level.height
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
} finally {
|
||
|
|
|
||
|
|
transcoder.delete();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
for ( let i = 0; i < taskConfig.levels.length; i ++ ) {
|
||
|
|
|
||
|
|
const level = taskConfig.levels[ i ];
|
||
|
|
const dstByteLength = getTranscodedImageByteLength( transcoderFormat, level.width, level.height );
|
||
|
|
const dst = new Uint8Array( dstByteLength );
|
||
|
|
const ok = BasisModule.transcodeUASTCImage( transcoderFormat, dst, dstByteLength / blockByteLength, level.data, getWidthInBlocks( transcoderFormat, level.width ), getHeightInBlocks( transcoderFormat, level.height ), level.width, level.height, level.index, 0, level.data.byteLength, 0, hasAlpha, false, 0, 0, - 1, - 1 );
|
||
|
|
assert( ok, 'THREE.BasisTextureLoader: transcodeUASTCImage() failed for level ' + level.index + '.' );
|
||
|
|
mipmaps.push( {
|
||
|
|
data: dst,
|
||
|
|
width: level.width,
|
||
|
|
height: level.height
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
hasAlpha,
|
||
|
|
mipmaps,
|
||
|
|
format: engineFormat
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function transcode( buffer ) {
|
||
|
|
|
||
|
|
const basisFile = new BasisModule.BasisFile( new Uint8Array( buffer ) );
|
||
|
|
const basisFormat = basisFile.isUASTC() ? BasisFormat.UASTC_4x4 : BasisFormat.ETC1S;
|
||
|
|
const width = basisFile.getImageWidth( 0, 0 );
|
||
|
|
const height = basisFile.getImageHeight( 0, 0 );
|
||
|
|
const levels = basisFile.getNumLevels( 0 );
|
||
|
|
const hasAlpha = basisFile.getHasAlpha();
|
||
|
|
|
||
|
|
function cleanup() {
|
||
|
|
|
||
|
|
basisFile.close();
|
||
|
|
basisFile.delete();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const {
|
||
|
|
transcoderFormat,
|
||
|
|
engineFormat
|
||
|
|
} = getTranscoderFormat( basisFormat, width, height, hasAlpha );
|
||
|
|
|
||
|
|
if ( ! width || ! height || ! levels ) {
|
||
|
|
|
||
|
|
cleanup();
|
||
|
|
throw new Error( 'THREE.BasisTextureLoader: Invalid texture' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! basisFile.startTranscoding() ) {
|
||
|
|
|
||
|
|
cleanup();
|
||
|
|
throw new Error( 'THREE.BasisTextureLoader: .startTranscoding failed' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const mipmaps = [];
|
||
|
|
|
||
|
|
for ( let mip = 0; mip < levels; mip ++ ) {
|
||
|
|
|
||
|
|
const mipWidth = basisFile.getImageWidth( 0, mip );
|
||
|
|
const mipHeight = basisFile.getImageHeight( 0, mip );
|
||
|
|
const dst = new Uint8Array( basisFile.getImageTranscodedSizeInBytes( 0, mip, transcoderFormat ) );
|
||
|
|
const status = basisFile.transcodeImage( dst, 0, mip, transcoderFormat, 0, hasAlpha );
|
||
|
|
|
||
|
|
if ( ! status ) {
|
||
|
|
|
||
|
|
cleanup();
|
||
|
|
throw new Error( 'THREE.BasisTextureLoader: .transcodeImage failed.' );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
mipmaps.push( {
|
||
|
|
data: dst,
|
||
|
|
width: mipWidth,
|
||
|
|
height: mipHeight
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
cleanup();
|
||
|
|
return {
|
||
|
|
width,
|
||
|
|
height,
|
||
|
|
hasAlpha,
|
||
|
|
mipmaps,
|
||
|
|
format: engineFormat
|
||
|
|
};
|
||
|
|
|
||
|
|
} //
|
||
|
|
// Optimal choice of a transcoder target format depends on the Basis format (ETC1S or UASTC),
|
||
|
|
// device capabilities, and texture dimensions. The list below ranks the formats separately
|
||
|
|
// for ETC1S and UASTC.
|
||
|
|
//
|
||
|
|
// In some cases, transcoding UASTC to RGBA32 might be preferred for higher quality (at
|
||
|
|
// significant memory cost) compared to ETC1/2, BC1/3, and PVRTC. The transcoder currently
|
||
|
|
// chooses RGBA32 only as a last resort and does not expose that option to the caller.
|
||
|
|
|
||
|
|
|
||
|
|
const FORMAT_OPTIONS = [ {
|
||
|
|
if: 'astcSupported',
|
||
|
|
basisFormat: [ BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.ASTC_4x4, TranscoderFormat.ASTC_4x4 ],
|
||
|
|
engineFormat: [ EngineFormat.RGBA_ASTC_4x4_Format, EngineFormat.RGBA_ASTC_4x4_Format ],
|
||
|
|
priorityETC1S: Infinity,
|
||
|
|
priorityUASTC: 1,
|
||
|
|
needsPowerOfTwo: false
|
||
|
|
}, {
|
||
|
|
if: 'bptcSupported',
|
||
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.BC7_M5, TranscoderFormat.BC7_M5 ],
|
||
|
|
engineFormat: [ EngineFormat.RGBA_BPTC_Format, EngineFormat.RGBA_BPTC_Format ],
|
||
|
|
priorityETC1S: 3,
|
||
|
|
priorityUASTC: 2,
|
||
|
|
needsPowerOfTwo: false
|
||
|
|
}, {
|
||
|
|
if: 'dxtSupported',
|
||
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.BC1, TranscoderFormat.BC3 ],
|
||
|
|
engineFormat: [ EngineFormat.RGB_S3TC_DXT1_Format, EngineFormat.RGBA_S3TC_DXT5_Format ],
|
||
|
|
priorityETC1S: 4,
|
||
|
|
priorityUASTC: 5,
|
||
|
|
needsPowerOfTwo: false
|
||
|
|
}, {
|
||
|
|
if: 'etc2Supported',
|
||
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC2 ],
|
||
|
|
engineFormat: [ EngineFormat.RGB_ETC2_Format, EngineFormat.RGBA_ETC2_EAC_Format ],
|
||
|
|
priorityETC1S: 1,
|
||
|
|
priorityUASTC: 3,
|
||
|
|
needsPowerOfTwo: false
|
||
|
|
}, {
|
||
|
|
if: 'etc1Supported',
|
||
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.ETC1, TranscoderFormat.ETC1 ],
|
||
|
|
engineFormat: [ EngineFormat.RGB_ETC1_Format, EngineFormat.RGB_ETC1_Format ],
|
||
|
|
priorityETC1S: 2,
|
||
|
|
priorityUASTC: 4,
|
||
|
|
needsPowerOfTwo: false
|
||
|
|
}, {
|
||
|
|
if: 'pvrtcSupported',
|
||
|
|
basisFormat: [ BasisFormat.ETC1S, BasisFormat.UASTC_4x4 ],
|
||
|
|
transcoderFormat: [ TranscoderFormat.PVRTC1_4_RGB, TranscoderFormat.PVRTC1_4_RGBA ],
|
||
|
|
engineFormat: [ EngineFormat.RGB_PVRTC_4BPPV1_Format, EngineFormat.RGBA_PVRTC_4BPPV1_Format ],
|
||
|
|
priorityETC1S: 5,
|
||
|
|
priorityUASTC: 6,
|
||
|
|
needsPowerOfTwo: true
|
||
|
|
} ];
|
||
|
|
const ETC1S_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
|
||
|
|
|
||
|
|
return a.priorityETC1S - b.priorityETC1S;
|
||
|
|
|
||
|
|
} );
|
||
|
|
const UASTC_OPTIONS = FORMAT_OPTIONS.sort( function ( a, b ) {
|
||
|
|
|
||
|
|
return a.priorityUASTC - b.priorityUASTC;
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
function getTranscoderFormat( basisFormat, width, height, hasAlpha ) {
|
||
|
|
|
||
|
|
let transcoderFormat;
|
||
|
|
let engineFormat;
|
||
|
|
const options = basisFormat === BasisFormat.ETC1S ? ETC1S_OPTIONS : UASTC_OPTIONS;
|
||
|
|
|
||
|
|
for ( let i = 0; i < options.length; i ++ ) {
|
||
|
|
|
||
|
|
const opt = options[ i ];
|
||
|
|
if ( ! config[ opt.if ] ) continue;
|
||
|
|
if ( ! opt.basisFormat.includes( basisFormat ) ) continue;
|
||
|
|
if ( opt.needsPowerOfTwo && ! ( isPowerOfTwo( width ) && isPowerOfTwo( height ) ) ) continue;
|
||
|
|
transcoderFormat = opt.transcoderFormat[ hasAlpha ? 1 : 0 ];
|
||
|
|
engineFormat = opt.engineFormat[ hasAlpha ? 1 : 0 ];
|
||
|
|
return {
|
||
|
|
transcoderFormat,
|
||
|
|
engineFormat
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
console.warn( 'THREE.BasisTextureLoader: No suitable compressed texture format found. Decoding to RGBA32.' );
|
||
|
|
transcoderFormat = TranscoderFormat.RGBA32;
|
||
|
|
engineFormat = EngineFormat.RGBAFormat;
|
||
|
|
return {
|
||
|
|
transcoderFormat,
|
||
|
|
engineFormat
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function assert( ok, message ) {
|
||
|
|
|
||
|
|
if ( ! ok ) throw new Error( message );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function getWidthInBlocks( transcoderFormat, width ) {
|
||
|
|
|
||
|
|
return Math.ceil( width / BasisModule.getFormatBlockWidth( transcoderFormat ) );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function getHeightInBlocks( transcoderFormat, height ) {
|
||
|
|
|
||
|
|
return Math.ceil( height / BasisModule.getFormatBlockHeight( transcoderFormat ) );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function getTranscodedImageByteLength( transcoderFormat, width, height ) {
|
||
|
|
|
||
|
|
const blockByteLength = BasisModule.getBytesPerBlockOrPixel( transcoderFormat );
|
||
|
|
|
||
|
|
if ( BasisModule.formatIsUncompressed( transcoderFormat ) ) {
|
||
|
|
|
||
|
|
return width * height * blockByteLength;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( transcoderFormat === TranscoderFormat.PVRTC1_4_RGB || transcoderFormat === TranscoderFormat.PVRTC1_4_RGBA ) {
|
||
|
|
|
||
|
|
// GL requires extra padding for very small textures:
|
||
|
|
// https://www.khronos.org/registry/OpenGL/extensions/IMG/IMG_texture_compression_pvrtc.txt
|
||
|
|
const paddedWidth = width + 3 & ~ 3;
|
||
|
|
const paddedHeight = height + 3 & ~ 3;
|
||
|
|
return ( Math.max( 8, paddedWidth ) * Math.max( 8, paddedHeight ) * 4 + 7 ) / 8;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return getWidthInBlocks( transcoderFormat, width ) * getHeightInBlocks( transcoderFormat, height ) * blockByteLength;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function isPowerOfTwo( value ) {
|
||
|
|
|
||
|
|
if ( value <= 2 ) return true;
|
||
|
|
return ( value & value - 1 ) === 0 && value !== 0;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
THREE.BasisTextureLoader = BasisTextureLoader;
|
||
|
|
|
||
|
|
} )();
|