/**
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* Cesium - https://github.com/CesiumGS/cesium
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*
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* Copyright 2011-2020 Cesium Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Columbus View (Pat. Pend.)
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*
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* Portions licensed separately.
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* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['./when-8d13db60', './Check-70bec281', './Math-61ede240', './RuntimeError-ba10bc3e', './WebGLConstants-4c11ee5f', './ComponentDatatype-5862616f', './IndexDatatype-9435b55f', './createTaskProcessorWorker'], function (when, Check, _Math, RuntimeError, WebGLConstants, ComponentDatatype, IndexDatatype, createTaskProcessorWorker) { 'use strict';
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/* global require */
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var draco;
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function decodeIndexArray(dracoGeometry, dracoDecoder) {
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var numPoints = dracoGeometry.num_points();
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var numFaces = dracoGeometry.num_faces();
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var faceIndices = new draco.DracoInt32Array();
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var numIndices = numFaces * 3;
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var indexArray = IndexDatatype.IndexDatatype.createTypedArray(numPoints, numIndices);
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var offset = 0;
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for (var i = 0; i < numFaces; ++i) {
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dracoDecoder.GetFaceFromMesh(dracoGeometry, i, faceIndices);
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indexArray[offset + 0] = faceIndices.GetValue(0);
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indexArray[offset + 1] = faceIndices.GetValue(1);
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indexArray[offset + 2] = faceIndices.GetValue(2);
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offset += 3;
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}
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draco.destroy(faceIndices);
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return {
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typedArray : indexArray,
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numberOfIndices : numIndices
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};
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}
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function decodeQuantizedDracoTypedArray(dracoGeometry, dracoDecoder, dracoAttribute, quantization, vertexArrayLength) {
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var vertexArray;
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var attributeData;
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if (quantization.quantizationBits <= 8) {
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attributeData = new draco.DracoUInt8Array();
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vertexArray = new Uint8Array(vertexArrayLength);
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dracoDecoder.GetAttributeUInt8ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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} else {
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attributeData = new draco.DracoUInt16Array();
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vertexArray = new Uint16Array(vertexArrayLength);
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dracoDecoder.GetAttributeUInt16ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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}
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for (var i = 0; i < vertexArrayLength; ++i) {
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vertexArray[i] = attributeData.GetValue(i);
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}
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draco.destroy(attributeData);
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return vertexArray;
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}
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function decodeDracoTypedArray(dracoGeometry, dracoDecoder, dracoAttribute, vertexArrayLength) {
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var vertexArray;
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var attributeData;
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// Some attribute types are casted down to 32 bit since Draco only returns 32 bit values
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switch (dracoAttribute.data_type()) {
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case 1: case 11: // DT_INT8 or DT_BOOL
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attributeData = new draco.DracoInt8Array();
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vertexArray = new Int8Array(vertexArrayLength);
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dracoDecoder.GetAttributeInt8ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 2: // DT_UINT8
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attributeData = new draco.DracoUInt8Array();
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vertexArray = new Uint8Array(vertexArrayLength);
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dracoDecoder.GetAttributeUInt8ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 3: // DT_INT16
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attributeData = new draco.DracoInt16Array();
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vertexArray = new Int16Array(vertexArrayLength);
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dracoDecoder.GetAttributeInt16ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 4: // DT_UINT16
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attributeData = new draco.DracoUInt16Array();
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vertexArray = new Uint16Array(vertexArrayLength);
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dracoDecoder.GetAttributeUInt16ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 5: case 7: // DT_INT32 or DT_INT64
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attributeData = new draco.DracoInt32Array();
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vertexArray = new Int32Array(vertexArrayLength);
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dracoDecoder.GetAttributeInt32ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 6: case 8: // DT_UINT32 or DT_UINT64
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attributeData = new draco.DracoUInt32Array();
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vertexArray = new Uint32Array(vertexArrayLength);
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dracoDecoder.GetAttributeUInt32ForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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case 9: case 10: // DT_FLOAT32 or DT_FLOAT64
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attributeData = new draco.DracoFloat32Array();
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vertexArray = new Float32Array(vertexArrayLength);
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dracoDecoder.GetAttributeFloatForAllPoints(dracoGeometry, dracoAttribute, attributeData);
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break;
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}
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for (var i = 0; i < vertexArrayLength; ++i) {
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vertexArray[i] = attributeData.GetValue(i);
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}
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draco.destroy(attributeData);
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return vertexArray;
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}
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function decodeAttribute(dracoGeometry, dracoDecoder, dracoAttribute) {
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var numPoints = dracoGeometry.num_points();
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var numComponents = dracoAttribute.num_components();
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var quantization;
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var transform = new draco.AttributeQuantizationTransform();
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if (transform.InitFromAttribute(dracoAttribute)) {
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var minValues = new Array(numComponents);
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for (var i = 0; i < numComponents; ++i) {
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minValues[i] = transform.min_value(i);
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}
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quantization = {
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quantizationBits : transform.quantization_bits(),
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minValues : minValues,
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range : transform.range(),
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octEncoded : false
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};
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}
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draco.destroy(transform);
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transform = new draco.AttributeOctahedronTransform();
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if (transform.InitFromAttribute(dracoAttribute)) {
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quantization = {
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quantizationBits : transform.quantization_bits(),
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octEncoded : true
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};
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}
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draco.destroy(transform);
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var vertexArrayLength = numPoints * numComponents;
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var vertexArray;
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if (when.defined(quantization)) {
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vertexArray = decodeQuantizedDracoTypedArray(dracoGeometry, dracoDecoder, dracoAttribute, quantization, vertexArrayLength);
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} else {
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vertexArray = decodeDracoTypedArray(dracoGeometry, dracoDecoder, dracoAttribute, vertexArrayLength);
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}
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var componentDatatype = ComponentDatatype.ComponentDatatype.fromTypedArray(vertexArray);
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return {
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array : vertexArray,
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data : {
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componentsPerAttribute : numComponents,
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componentDatatype : componentDatatype,
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byteOffset : dracoAttribute.byte_offset(),
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byteStride : ComponentDatatype.ComponentDatatype.getSizeInBytes(componentDatatype) * numComponents,
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normalized : dracoAttribute.normalized(),
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quantization : quantization
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}
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};
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}
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function decodePointCloud(parameters) {
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var dracoDecoder = new draco.Decoder();
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if (parameters.dequantizeInShader) {
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dracoDecoder.SkipAttributeTransform(draco.POSITION);
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dracoDecoder.SkipAttributeTransform(draco.NORMAL);
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}
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var buffer = new draco.DecoderBuffer();
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buffer.Init(parameters.buffer, parameters.buffer.length);
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var geometryType = dracoDecoder.GetEncodedGeometryType(buffer);
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if (geometryType !== draco.POINT_CLOUD) {
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throw new RuntimeError.RuntimeError('Draco geometry type must be POINT_CLOUD.');
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}
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var dracoPointCloud = new draco.PointCloud();
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var decodingStatus = dracoDecoder.DecodeBufferToPointCloud(buffer, dracoPointCloud);
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if (!decodingStatus.ok() || dracoPointCloud.ptr === 0) {
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throw new RuntimeError.RuntimeError('Error decoding draco point cloud: ' + decodingStatus.error_msg());
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}
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draco.destroy(buffer);
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var result = {};
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var properties = parameters.properties;
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for (var propertyName in properties) {
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if (properties.hasOwnProperty(propertyName)) {
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var attributeId = properties[propertyName];
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var dracoAttribute = dracoDecoder.GetAttributeByUniqueId(dracoPointCloud, attributeId);
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result[propertyName] = decodeAttribute(dracoPointCloud, dracoDecoder, dracoAttribute);
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}
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}
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draco.destroy(dracoPointCloud);
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draco.destroy(dracoDecoder);
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return result;
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}
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function decodePrimitive(parameters) {
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var dracoDecoder = new draco.Decoder();
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// Skip all parameter types except generic
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var attributesToSkip = ['POSITION', 'NORMAL', 'COLOR', 'TEX_COORD'];
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if (parameters.dequantizeInShader) {
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for (var i = 0; i < attributesToSkip.length; ++i) {
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dracoDecoder.SkipAttributeTransform(draco[attributesToSkip[i]]);
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}
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}
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var bufferView = parameters.bufferView;
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var buffer = new draco.DecoderBuffer();
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buffer.Init(parameters.array, bufferView.byteLength);
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var geometryType = dracoDecoder.GetEncodedGeometryType(buffer);
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if (geometryType !== draco.TRIANGULAR_MESH) {
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throw new RuntimeError.RuntimeError('Unsupported draco mesh geometry type.');
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}
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var dracoGeometry = new draco.Mesh();
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var decodingStatus = dracoDecoder.DecodeBufferToMesh(buffer, dracoGeometry);
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if (!decodingStatus.ok() || dracoGeometry.ptr === 0) {
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throw new RuntimeError.RuntimeError('Error decoding draco mesh geometry: ' + decodingStatus.error_msg());
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}
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draco.destroy(buffer);
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var attributeData = {};
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var compressedAttributes = parameters.compressedAttributes;
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for (var attributeName in compressedAttributes) {
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if (compressedAttributes.hasOwnProperty(attributeName)) {
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var compressedAttribute = compressedAttributes[attributeName];
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var dracoAttribute = dracoDecoder.GetAttributeByUniqueId(dracoGeometry, compressedAttribute);
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attributeData[attributeName] = decodeAttribute(dracoGeometry, dracoDecoder, dracoAttribute);
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}
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}
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var result = {
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indexArray : decodeIndexArray(dracoGeometry, dracoDecoder),
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attributeData : attributeData
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};
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draco.destroy(dracoGeometry);
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draco.destroy(dracoDecoder);
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return result;
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}
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function decode(parameters) {
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if (when.defined(parameters.primitive)) {
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return decodePrimitive(parameters);
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}
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return decodePointCloud(parameters);
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}
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function initWorker(dracoModule) {
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draco = dracoModule;
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self.onmessage = createTaskProcessorWorker(decode);
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self.postMessage(true);
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}
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function decodeDraco(event) {
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var data = event.data;
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// Expect the first message to be to load a web assembly module
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var wasmConfig = data.webAssemblyConfig;
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if (when.defined(wasmConfig)) {
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// Require and compile WebAssembly module, or use fallback if not supported
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return require([wasmConfig.modulePath], function(dracoModule) {
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if (when.defined(wasmConfig.wasmBinaryFile)) {
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if (!when.defined(dracoModule)) {
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dracoModule = self.DracoDecoderModule;
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}
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dracoModule(wasmConfig).then(function (compiledModule) {
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initWorker(compiledModule);
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});
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} else {
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initWorker(dracoModule());
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}
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});
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}
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}
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return decodeDraco;
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});
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