79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
import EventEmitter from 'eventemitter3';
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import { uid } from '../../../../utils/data/uid.mjs';
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"use strict";
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class BufferResource extends EventEmitter {
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/**
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* Create a new Buffer Resource.
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* @param options - The options for the buffer resource
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* @param options.buffer - The underlying buffer that this resource is using
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* @param options.offset - The offset of the buffer this resource is using.
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* If not provided, then it will use the offset of the buffer.
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* @param options.size - The size of the buffer this resource is using.
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* If not provided, then it will use the size of the buffer.
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*/
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constructor({ buffer, offset, size }) {
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super();
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/**
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* emits when the underlying buffer has changed shape (i.e. resized)
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* letting the renderer know that it needs to discard the old buffer on the GPU and create a new one
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* @event change
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*/
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/** a unique id for this uniform group used through the renderer */
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this.uid = uid("buffer");
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/**
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* a resource type, used to identify how to handle it when its in a bind group / shader resource
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* @internal
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* @ignore
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*/
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this._resourceType = "bufferResource";
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/**
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* used internally to know if a uniform group was used in the last render pass
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* @internal
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* @ignore
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*/
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this._touched = 0;
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/**
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* the resource id used internally by the renderer to build bind group keys
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* @internal
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* @ignore
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*/
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this._resourceId = uid("resource");
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/**
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* A cheeky hint to the GL renderer to let it know this is a BufferResource
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* @internal
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* @ignore
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*/
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this._bufferResource = true;
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/**
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* Has the Buffer resource been destroyed?
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* @readonly
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*/
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this.destroyed = false;
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this.buffer = buffer;
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this.offset = offset | 0;
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this.size = size;
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this.buffer.on("change", this.onBufferChange, this);
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}
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onBufferChange() {
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this._resourceId = uid("resource");
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this.emit("change", this);
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}
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/**
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* Destroys this resource. Make sure the underlying buffer is not used anywhere else
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* if you want to destroy it as well, or code will explode
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* @param destroyBuffer - Should the underlying buffer be destroyed as well?
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*/
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destroy(destroyBuffer = false) {
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this.destroyed = true;
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if (destroyBuffer) {
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this.buffer.destroy();
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}
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this.emit("change", this);
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this.buffer = null;
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}
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}
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export { BufferResource };
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//# sourceMappingURL=BufferResource.mjs.map
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