GPUDevice: importExternalTexture() method

Secure contextAvailable in workers

The importExternalTexture() method of the GPUDevice interface takes an HTMLVideoElement or a VideoFrame object as an input and returns a GPUExternalTexture wrapper object containing a snapshot of the video that can be used as a frame in GPU rendering operations.

Syntax

importExternalTexture(descriptor)

Parameters

• descriptor
  • : An object containing the following properties:
    • colorSpace Optional
      • : An enumerated value specifying the color space to use for the video frame. Possible values are "srgb" and "display-p3". If omitted, colorSpace defaults to "srgb".
    • label Optional
      • : A string providing a label that can be used to identify the object, for example in GPUError messages or console warnings.
    • source
      • : The HTMLVideoElement or VideoFrame source of the video snapshot.

Return value

A GPUExternalTexture object instance.

Note that the moment when the GPUExternalTexture object expires (is destroyed) depends on what its source is:

• GPUExternalTexture objects with an HTMLVideoElement source expire as soon as they are used (for example in a bind group).
• GPUExternalTexture objects with a VideoFrame source expire only when the VideoFrame is closed, for example via a close() call.

Validation

The following criteria must be met when calling importExternalTexture(), otherwise a GPUValidationError is generated and an invalid GPUExternalTexture object is returned:

• The video snapshot is usable (e.g., the video source is loaded properly, and doesn’t have a width or height of 0).

Exceptions

• SecurityError DOMException
  • : Thrown if the video source data is cross-origin.

Examples

In the WebGPU samples Video Uploading sample, an importExternalTexture() call is used as the value of a bind group entry resource, specified when creating a GPUBindGroup via a createBindGroup() call:

// …

const uniformBindGroup = device.createBindGroup({
  layout: pipeline.getBindGroupLayout(0),
  entries: [
    {
      binding: 1,
      resource: sampler,
    },
    {
      binding: 2,
      resource: device.importExternalTexture({
        source: video,
      }),
    },
  ],
});

// …

Specifications

Browser compatibility

See also

• The WebGPU API