pixi.js/lib/rendering/renderers/shared/buffer/BufferResource.mjs.map

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{"version":3,"file":"BufferResource.mjs","sources":["../../../../../src/rendering/renderers/shared/buffer/BufferResource.ts"],"sourcesContent":["import EventEmitter from 'eventemitter3';\nimport { uid } from '../../../../utils/data/uid';\n\nimport type { BindResource } from '../../gpu/shader/BindResource';\nimport type { Buffer } from './Buffer';\n\n/**\n * A resource that can be bound to a bind group and used in a shader.\n * Whilst a buffer can be used as a resource, this class allows you to specify an offset and size of the buffer to use.\n * This is useful if you have a large buffer and only part of it is used in a shader.\n *\n * This resource, will listen for changes on the underlying buffer and emit a itself if the buffer changes shape.\n * @example\n *\n * const buffer = new Buffer({\n *     data: new Float32Array(1000),\n *    usage: BufferUsage.UNIFORM,\n * });\n * // Create a buffer resource that uses the first 100 bytes of a buffer\n * const bufferResource = new BufferResource({\n *    buffer,\n *    offset: 0,\n *    size: 100,\n * });\n * @category rendering\n * @advanced\n */\nexport class BufferResource extends EventEmitter<{\n    change: BindResource,\n}> implements BindResource\n{\n    /**\n     * emits when the underlying buffer has changed shape (i.e. resized)\n     * letting the renderer know that it needs to discard the old buffer on the GPU and create a new one\n     * @event change\n     */\n\n    /** a unique id for this uniform group used through the renderer */\n    public readonly uid: number = uid('buffer');\n\n    /**\n     * a resource type, used to identify how to handle it when its in a bind group / shader resource\n     * @internal\n     */\n    public readonly _resourceType = 'bufferResource';\n\n    /**\n     * used internally to know if a uniform group was used in the last render pass\n     * @internal\n     */\n    public _touched = 0;\n\n    /**\n     * the resource id used internally by the renderer to build bind group keys\n     * @internal\n     */\n    public _resourceId = uid('resource');\n\n    /** the underlying buffer that this resource is using */\n    public buffer: Buffer;\n    /** the offset of the buffer this resource is using. If not provided, then it will use the offset of the buffer. */\n    public readonly offset: number;\n    /** the size of the buffer this resource is using. If not provided, then it will use the size of the buffer. */\n    public readonly size: number;\n    /**\n     * A cheeky hint to the GL renderer to let it know this is a BufferResource\n     * @internal\n     */\n    public readonly _bufferResource = true;\n\n    /**\n     * Has the Buffer resource been destroyed?\n     * @readonly\n     */\n    public destroyed = false;\n\n    /**\n     * Create a new Buffer Resource.\n     * @param options - The options for the buffer resource\n     * @param options.buffer - The underlying buffer that this resource is using\n     * @param options.offset - The offset of the buffer this resource is using.\n     * If not provided, then it will use the offset of the buffer.\n     * @param options.size - The size of the buffer this resource is using.\n     * If not provided, then it will use the size of the buffer.\n     */\n    constructor({ buffer, offset, size }: { buffer: Buffer; offset?: number; size?: number; })\n    {\n        super();\n\n        this.buffer = buffer;\n        this.offset = offset | 0;\n        this.size = size;\n\n        this.buffer.on('change', this.onBufferChange, this);\n    }\n\n    protected onBufferChange(): void\n    {\n        this._resourceId = uid('resource');\n\n        this.emit('change', this);\n    }\n\n    /**\n     * Destroys this resource. Make sure the underlying buffer is not used anywhere else\n     * if you want to destroy it as well, or code will explode\n     * @param destroyBuffer - Should the underlying buffer be destroyed as well?\n     */\n    public destroy(destroyBuffer = false): void\n    {\n        this.destroyed = true;\n\n        if (destroyBuffer)\n        {\n            this.buffer.destroy();\n        }\n\n        this.emit('change', this);\n\n        this.buffer = null;\n        this.removeAllListeners();\n    }\n}\n"],"names":[],"mappings":";;;;AA2BO,MAAM,uBAAuB,YAAA,CAGpC;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAuDI,WAAA,CAAY,EAAE,MAAA,EAAQ,MAAA,EAAQ,MAAK,EACnC;AACI,IAAA,KAAA,EAAM;AAjDV;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAgB,GAAA,GAAc,IAAI,QAAQ,CAAA;AAM1C;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAgB,aAAA,GAAgB,gBAAA;AAMhC;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAO,QAAA,GAAW,CAAA;AAMlB;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAO,WAAA,GAAc,IAAI,UAAU,CAAA;AAYnC;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAgB,eAAA,GAAkB,IAAA;AAMlC;AAAA;AAAA;AAAA;AAAA,IAAA,IAAA,CAAO,SAAA,GAAY,KAAA;AAef,IAAA,IAAA,CAAK,MAAA,GAAS,MAAA;AACd,IAAA,IAAA,CAAK,SAAS,MAAA,GAAS,CAAA;AACvB,IAAA,IAAA,CAAK,IAAA,GAAO,IAAA;AAEZ,IAAA,IAAA,CAAK,MAAA,CAAO,EAAA,CAAG,QAAA,EAAU,IAAA,CAAK,gBAAgB,IAAI,CAAA;AAAA,EACtD;AAAA,EAEU,cAAA,GACV;AACI,IAAA,IAAA,CAAK,WAAA,GAAc,IAAI,UAAU,CAAA;AAEjC,IAAA,IAAA,CAAK,IAAA,CAAK,UAAU,IAAI,CAAA;AAAA,EAC5B;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAOO,OAAA,CAAQ,gBAAgB,KAAA,EAC/B;AACI,IAAA,IAAA,CAAK,SAAA,GAAY,IAAA;AAEjB,IAAA,IAAI,aAAA,EACJ;AACI,MAAA,IAAA,CAAK,OAAO,OAAA,EAAQ;AAAA,IACxB;AAEA,IAAA,IAAA,CAAK,IAAA,CAAK,UAAU,IAAI,CAAA;AAExB,IAAA,IAAA,CAAK,MAAA,GAAS,IAAA;AACd,IAAA,IAAA,CAAK,kBAAA,EAAmB;AAAA,EAC5B;AACJ;;;;"}