import Check from "../Core/Check.js";
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import defaultValue from "../Core/defaultValue.js";
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import defined from "../Core/defined.js";
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import DeveloperError from "../Core/DeveloperError.js";
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import getAbsoluteUri from "../Core/getAbsoluteUri.js";
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import GltfLoaderUtil from "./GltfLoaderUtil.js";
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import hasExtension from "./hasExtension.js";
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/**
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* Compute cache keys for resources in {@link ResourceCache}.
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*
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* @namespace ResourceCacheKey
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*
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* @private
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*/
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var ResourceCacheKey = {};
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function getExternalResourceCacheKey(resource) {
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return getAbsoluteUri(resource.url);
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}
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function getBufferViewCacheKey(bufferView) {
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var byteOffset = bufferView.byteOffset;
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var byteLength = bufferView.byteLength;
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if (hasExtension(bufferView, "EXT_meshopt_compression")) {
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var meshopt = bufferView.extensions.EXT_meshopt_compression;
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byteOffset = defaultValue(meshopt.byteOffset, 0);
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byteLength = meshopt.byteLength;
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}
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return byteOffset + "-" + (byteOffset + byteLength);
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}
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function getAccessorCacheKey(accessor, bufferView) {
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var byteOffset = bufferView.byteOffset + accessor.byteOffset;
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var componentType = accessor.componentType;
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var type = accessor.type;
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var count = accessor.count;
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return byteOffset + "-" + componentType + "-" + type + "-" + count;
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}
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function getExternalBufferCacheKey(resource) {
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return getExternalResourceCacheKey(resource);
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}
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function getEmbeddedBufferCacheKey(parentResource, bufferId) {
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var parentCacheKey = getExternalResourceCacheKey(parentResource);
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return parentCacheKey + "-buffer-id-" + bufferId;
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}
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function getBufferCacheKey(buffer, bufferId, gltfResource, baseResource) {
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if (defined(buffer.uri)) {
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var resource = baseResource.getDerivedResource({
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url: buffer.uri,
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});
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return getExternalBufferCacheKey(resource);
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}
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return getEmbeddedBufferCacheKey(gltfResource, bufferId);
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}
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function getDracoCacheKey(gltf, draco, gltfResource, baseResource) {
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var bufferViewId = draco.bufferView;
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var bufferView = gltf.bufferViews[bufferViewId];
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var bufferId = bufferView.buffer;
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var buffer = gltf.buffers[bufferId];
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var bufferCacheKey = getBufferCacheKey(
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buffer,
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bufferId,
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gltfResource,
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baseResource
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);
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var bufferViewCacheKey = getBufferViewCacheKey(bufferView);
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return bufferCacheKey + "-range-" + bufferViewCacheKey;
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}
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function getImageCacheKey(gltf, imageId, gltfResource, baseResource) {
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var image = gltf.images[imageId];
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var bufferViewId = image.bufferView;
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var uri = image.uri;
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if (defined(uri)) {
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var resource = baseResource.getDerivedResource({
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url: uri,
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});
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return getExternalResourceCacheKey(resource);
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}
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var bufferView = gltf.bufferViews[bufferViewId];
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var bufferId = bufferView.buffer;
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var buffer = gltf.buffers[bufferId];
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var bufferCacheKey = getBufferCacheKey(
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buffer,
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bufferId,
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gltfResource,
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baseResource
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);
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var bufferViewCacheKey = getBufferViewCacheKey(bufferView);
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return bufferCacheKey + "-range-" + bufferViewCacheKey;
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}
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function getSamplerCacheKey(gltf, textureInfo) {
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var sampler = GltfLoaderUtil.createSampler({
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gltf: gltf,
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textureInfo: textureInfo,
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});
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return (
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sampler.wrapS +
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"-" +
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sampler.wrapT +
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"-" +
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sampler.minificationFilter +
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"-" +
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sampler.magnificationFilter
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);
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}
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/**
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* Gets the schema cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} [options.schema] An object that explicitly defines a schema JSON. Mutually exclusive with options.resource.
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* @param {Resource} [options.resource] The {@link Resource} pointing to the schema JSON. Mutually exclusive with options.schema.
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*
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* @returns {String} The schema cache key.
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*
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* @exception {DeveloperError} One of options.schema and options.resource must be defined.
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* @private
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*/
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ResourceCacheKey.getSchemaCacheKey = function (options) {
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var schema = options.schema;
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var resource = options.resource;
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//>>includeStart('debug', pragmas.debug);
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if (defined(schema) === defined(resource)) {
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throw new DeveloperError(
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"One of options.schema and options.resource must be defined."
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);
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}
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//>>includeEnd('debug');
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if (defined(schema)) {
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return "embedded-schema:" + JSON.stringify(schema);
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}
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return "external-schema:" + getExternalResourceCacheKey(resource);
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};
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/**
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* Gets the external buffer cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Resource} options.resource The {@link Resource} pointing to the external buffer.
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*
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* @returns {String} The external buffer cache key.
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* @private
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*/
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ResourceCacheKey.getExternalBufferCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var resource = options.resource;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.resource", resource);
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//>>includeEnd('debug');
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return "external-buffer:" + getExternalBufferCacheKey(resource);
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};
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/**
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* Gets the embedded buffer cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Resource} options.parentResource The {@link Resource} containing the embedded buffer.
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* @param {Number} options.bufferId A unique identifier of the embedded buffer within the parent resource.
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*
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* @returns {String} The embedded buffer cache key.
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* @private
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*/
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ResourceCacheKey.getEmbeddedBufferCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var parentResource = options.parentResource;
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var bufferId = options.bufferId;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.parentResource", parentResource);
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Check.typeOf.number("options.bufferId", bufferId);
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//>>includeEnd('debug');
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return (
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"embedded-buffer:" + getEmbeddedBufferCacheKey(parentResource, bufferId)
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);
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};
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/**
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* Gets the glTF cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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*
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* @returns {String} The glTF cache key.
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* @private
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*/
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ResourceCacheKey.getGltfCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltfResource = options.gltfResource;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltfResource", gltfResource);
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//>>includeEnd('debug');
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return "gltf:" + getExternalResourceCacheKey(gltfResource);
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};
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/**
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* Gets the buffer view cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} options.gltf The glTF JSON.
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* @param {Number} options.bufferViewId The bufferView ID.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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*
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* @returns {String} The buffer view cache key.
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* @private
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*/
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ResourceCacheKey.getBufferViewCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var bufferViewId = options.bufferViewId;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.number("options.bufferViewId", bufferViewId);
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Check.typeOf.object("options.gltfResource", gltfResource);
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Check.typeOf.object("options.baseResource", baseResource);
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//>>includeEnd('debug');
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var bufferView = gltf.bufferViews[bufferViewId];
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var bufferId = bufferView.buffer;
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var buffer = gltf.buffers[bufferId];
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if (hasExtension(bufferView, "EXT_meshopt_compression")) {
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var meshopt = bufferView.extensions.EXT_meshopt_compression;
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bufferId = meshopt.buffer;
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}
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var bufferCacheKey = getBufferCacheKey(
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buffer,
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bufferId,
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gltfResource,
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baseResource
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);
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var bufferViewCacheKey = getBufferViewCacheKey(bufferView);
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return "buffer-view:" + bufferCacheKey + "-range-" + bufferViewCacheKey;
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};
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/**
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* Gets the Draco cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} options.gltf The glTF JSON.
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* @param {Object} options.draco The Draco extension object.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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*
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* @returns {String} The Draco cache key.
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* @private
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*/
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ResourceCacheKey.getDracoCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var draco = options.draco;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.object("options.draco", draco);
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Check.typeOf.object("options.gltfResource", gltfResource);
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Check.typeOf.object("options.baseResource", baseResource);
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//>>includeEnd('debug');
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return "draco:" + getDracoCacheKey(gltf, draco, gltfResource, baseResource);
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};
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/**
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* Gets the vertex buffer cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} options.gltf The glTF JSON.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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* @param {Number} [options.bufferViewId] The bufferView ID corresponding to the vertex buffer.
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* @param {Object} [options.draco] The Draco extension object.
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* @param {String} [options.attributeSemantic] The attribute semantic, e.g. POSITION or NORMAL.
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* @param {Boolean} [dequantize=false] Determines whether or not the vertex buffer will be dequantized on the CPU.
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* @param {Boolean} [loadAsTypedArray=false] Load vertex buffer as a typed array instead of a GPU vertex buffer.
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*
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* @exception {DeveloperError} One of options.bufferViewId and options.draco must be defined.
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* @exception {DeveloperError} When options.draco is defined options.attributeSemantic must also be defined.
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*
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* @returns {String} The vertex buffer cache key.
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* @private
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*/
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ResourceCacheKey.getVertexBufferCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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var bufferViewId = options.bufferViewId;
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var draco = options.draco;
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var attributeSemantic = options.attributeSemantic;
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var dequantize = defaultValue(options.dequantize, false);
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var loadAsTypedArray = defaultValue(options.loadAsTypedArray, false);
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.object("options.gltfResource", gltfResource);
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Check.typeOf.object("options.baseResource", baseResource);
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var hasBufferViewId = defined(bufferViewId);
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var hasDraco = defined(draco);
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var hasAttributeSemantic = defined(attributeSemantic);
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if (hasBufferViewId === hasDraco) {
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throw new DeveloperError(
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"One of options.bufferViewId and options.draco must be defined."
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);
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}
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if (hasDraco && !hasAttributeSemantic) {
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throw new DeveloperError(
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"When options.draco is defined options.attributeSemantic must also be defined."
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);
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}
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if (hasDraco) {
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Check.typeOf.object("options.draco", draco);
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Check.typeOf.string("options.attributeSemantic", attributeSemantic);
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}
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//>>includeEnd('debug');
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var cacheKeySuffix = "";
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if (dequantize) {
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cacheKeySuffix += "-dequantize";
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}
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if (loadAsTypedArray) {
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cacheKeySuffix += "-typed-array";
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}
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if (defined(draco)) {
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var dracoCacheKey = getDracoCacheKey(
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gltf,
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draco,
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gltfResource,
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baseResource
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);
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return (
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"vertex-buffer:" +
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dracoCacheKey +
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"-draco-" +
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attributeSemantic +
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cacheKeySuffix
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);
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}
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var bufferView = gltf.bufferViews[bufferViewId];
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var bufferId = bufferView.buffer;
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var buffer = gltf.buffers[bufferId];
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var bufferCacheKey = getBufferCacheKey(
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buffer,
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bufferId,
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gltfResource,
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baseResource
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);
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var bufferViewCacheKey = getBufferViewCacheKey(bufferView);
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return (
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"vertex-buffer:" +
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bufferCacheKey +
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"-range-" +
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bufferViewCacheKey +
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cacheKeySuffix
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);
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};
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/**
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* Gets the index buffer cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} options.gltf The glTF JSON.
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* @param {Number} options.accessorId The accessor ID corresponding to the index buffer.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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* @param {Object} [options.draco] The Draco extension object.
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* @param {Boolean} [loadAsTypedArray=false] Load index buffer as a typed array instead of a GPU index buffer.
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*
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* @returns {String} The index buffer cache key.
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* @private
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*/
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ResourceCacheKey.getIndexBufferCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var accessorId = options.accessorId;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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var draco = options.draco;
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var loadAsTypedArray = defaultValue(options.loadAsTypedArray, false);
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.number("options.accessorId", accessorId);
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Check.typeOf.object("options.gltfResource", gltfResource);
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Check.typeOf.object("options.baseResource", baseResource);
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//>>includeEnd('debug');
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var cacheKeySuffix = "";
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if (loadAsTypedArray) {
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cacheKeySuffix += "-typed-array";
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}
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if (defined(draco)) {
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var dracoCacheKey = getDracoCacheKey(
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gltf,
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draco,
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gltfResource,
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baseResource
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);
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return "index-buffer:" + dracoCacheKey + "-draco" + cacheKeySuffix;
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}
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var accessor = gltf.accessors[accessorId];
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var bufferViewId = accessor.bufferView;
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var bufferView = gltf.bufferViews[bufferViewId];
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var bufferId = bufferView.buffer;
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var buffer = gltf.buffers[bufferId];
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var bufferCacheKey = getBufferCacheKey(
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buffer,
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bufferId,
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gltfResource,
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baseResource
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);
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var accessorCacheKey = getAccessorCacheKey(accessor, bufferView);
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return (
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"index-buffer:" +
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bufferCacheKey +
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"-accessor-" +
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accessorCacheKey +
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cacheKeySuffix
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);
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};
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/**
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* Gets the image cache key.
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*
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* @param {Object} options Object with the following properties:
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* @param {Object} options.gltf The glTF JSON.
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* @param {Number} options.imageId The image ID.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
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* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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*
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* @returns {String} The image cache key.
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* @private
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*/
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ResourceCacheKey.getImageCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var imageId = options.imageId;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.number("options.imageId", imageId);
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Check.typeOf.object("options.gltfResource", gltfResource);
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Check.typeOf.object("options.baseResource", baseResource);
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//>>includeEnd('debug');
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var imageCacheKey = getImageCacheKey(
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gltf,
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imageId,
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gltfResource,
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baseResource
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);
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return "image:" + imageCacheKey;
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};
|
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/**
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* Gets the texture cache key.
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*
|
* @param {Object} options Object with the following properties:
|
* @param {Object} options.gltf The glTF JSON.
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* @param {Object} options.textureInfo The texture info object.
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* @param {Resource} options.gltfResource The {@link Resource} containing the glTF.
|
* @param {Resource} options.baseResource The {@link Resource} that paths in the glTF JSON are relative to.
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* @param {SupportedImageFormats} options.supportedImageFormats The supported image formats.
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*
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* @returns {String} The texture cache key.
|
* @private
|
*/
|
ResourceCacheKey.getTextureCacheKey = function (options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var gltf = options.gltf;
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var textureInfo = options.textureInfo;
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var gltfResource = options.gltfResource;
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var baseResource = options.baseResource;
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var supportedImageFormats = options.supportedImageFormats;
|
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("options.gltf", gltf);
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Check.typeOf.object("options.textureInfo", textureInfo);
|
Check.typeOf.object("options.gltfResource", gltfResource);
|
Check.typeOf.object("options.baseResource", baseResource);
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Check.typeOf.object("options.supportedImageFormats", supportedImageFormats);
|
//>>includeEnd('debug');
|
|
var textureId = textureInfo.index;
|
|
var imageId = GltfLoaderUtil.getImageIdFromTexture({
|
gltf: gltf,
|
textureId: textureId,
|
supportedImageFormats: supportedImageFormats,
|
});
|
|
var imageCacheKey = getImageCacheKey(
|
gltf,
|
imageId,
|
gltfResource,
|
baseResource
|
);
|
|
// Include the sampler cache key in the texture cache key since textures and
|
// samplers are coupled in WebGL 1. When upgrading to WebGL 2 consider
|
// removing the sampleCacheKey here.
|
var samplerCacheKey = getSamplerCacheKey(gltf, textureInfo);
|
|
return "texture:" + imageCacheKey + "-sampler-" + samplerCacheKey;
|
};
|
|
export default ResourceCacheKey;
|