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