Class GraphicsDevice

The graphics device manages the underlying graphics context. It is responsible for submitting render state changes and graphics primitives to the hardware. A graphics device is tied to a specific canvas HTML element. It is valid to have more than one canvas element per page and create a new graphics device against each.

Hierarchy (View Summary)

Properties

backBufferAntialias canvas gpuProfiler insideRenderPass isHdr isWebGL2 isWebGPU maxAnisotropy maxColorAttachments maxCubeMapSize maxSamples maxTextureSize maxVolumeSize precision samples scope supportsClipDistances supportsCompute supportsStorageTextureRead textureFloatFilterable textureFloatRenderable textureHalfFloatRenderable textureRG11B10Renderable

Accessors

deviceType fullscreen height maxPixelRatio width

Methods

computeDispatch destroy fire getRenderableHdrFormat getRenderTarget hasEvent off on once postInit setBlendColor setBlendState setCullMode setDepthState setIndexBuffer setRenderTarget setStencilState setVertexBuffer validateAttributes

Properties

backBufferAntialias

backBufferAntialias: boolean = false

True if the back buffer should use anti-aliasing.

Readonlycanvas

canvas: HTMLCanvasElement

The canvas DOM element that provides the underlying WebGL context used by the graphics device.

gpuProfiler

gpuProfiler: GpuProfiler

The GPU profiler.

insideRenderPass

insideRenderPass: boolean = false

isHdr

isHdr: boolean = false

True if the back-buffer is using HDR format, which means that the browser will display the rendered images in high dynamic range mode. This is true if the options.displayFormat is set to DISPLAYFORMAT_HDR when creating the graphics device using createGraphicsDevice, and HDR is supported by the device.

ReadonlyisWebGL2

isWebGL2: boolean = false

True if the deviceType is WebGL2

ReadonlyisWebGPU

isWebGPU: boolean = false

True if the deviceType is WebGPU

ReadonlymaxAnisotropy

maxAnisotropy: number

The maximum supported texture anisotropy setting.

ReadonlymaxColorAttachments

maxColorAttachments: number = 1

The maximum supported number of color buffers attached to a render target.

ReadonlymaxCubeMapSize

maxCubeMapSize: number

The maximum supported dimension of a cube map.

ReadonlymaxSamples

maxSamples: number = 1

The maximum supported number of hardware anti-aliasing samples.

ReadonlymaxTextureSize

maxTextureSize: number

The maximum supported dimension of a texture.

ReadonlymaxVolumeSize

maxVolumeSize: number

The maximum supported dimension of a 3D texture (any axis).

Readonlyprecision

precision: string

The highest shader precision supported by this graphics device. Can be 'hiphp', 'mediump' or 'lowp'.

Readonlysamples

samples: number

The number of hardware anti-aliasing samples used by the frame buffer.

Readonlyscope

scope: ScopeSpace

The scope namespace for shader attributes and variables.

supportsClipDistances

supportsClipDistances: boolean = false

True if the device supports clip distances (WebGPU only). Clip distances allow you to restrict primitives' clip volume with user-defined half-spaces in the output of vertex stage.

ReadonlysupportsCompute

supportsCompute: boolean = false

True if the device supports compute shaders.

ReadonlysupportsStorageTextureRead

supportsStorageTextureRead: boolean = false

True if the device can read from StorageTexture in the compute shader. By default, the storage texture can be only used with the write operation. When a shader uses this feature, it's recommended to use a requires directive to signal the potential for non-portability at the top of the WGSL shader code:

requires readonly_and_readwrite_storage_textures;

ReadonlytextureFloatFilterable

textureFloatFilterable: boolean = false

True if filtering can be applied when sampling float textures.

ReadonlytextureFloatRenderable

textureFloatRenderable: boolean

True if 32-bit floating-point textures can be used as a frame buffer.

ReadonlytextureHalfFloatRenderable

textureHalfFloatRenderable: boolean

True if 16-bit floating-point textures can be used as a frame buffer.

ReadonlytextureRG11B10Renderable

textureRG11B10Renderable: boolean = false

True if small-float textures with format PIXELFORMAT_111110F can be used as a frame buffer. This is always true on WebGL2, but optional on WebGPU device.

Accessors

deviceType

fullscreen

height

maxPixelRatio

width

Methods

computeDispatch

  • computeDispatch(computes: Compute[], name?: string): void

    Dispatch multiple compute shaders inside a single compute shader pass.

    Parameters

    • computes: Compute[]

      An array of compute shaders to dispatch.

    • Optionalname: string = 'Unnamed'

      The name of the dispatch, used for debugging and reporting only.

    Returns void

destroy

fire

  • fire(
        name: string,
        arg1?: any,
        arg2?: any,
        arg3?: any,
        arg4?: any,
        arg5?: any,
        arg6?: any,
        arg7?: any,
        arg8?: any,
    ): EventHandler

    Fire an event, all additional arguments are passed on to the event listener.

    Parameters

    • name: string

      Name of event to fire.

    • Optionalarg1: any

      First argument that is passed to the event handler.

    • Optionalarg2: any

      Second argument that is passed to the event handler.

    • Optionalarg3: any

      Third argument that is passed to the event handler.

    • Optionalarg4: any

      Fourth argument that is passed to the event handler.

    • Optionalarg5: any

      Fifth argument that is passed to the event handler.

    • Optionalarg6: any

      Sixth argument that is passed to the event handler.

    • Optionalarg7: any

      Seventh argument that is passed to the event handler.

    • Optionalarg8: any

      Eighth argument that is passed to the event handler.

    Returns EventHandler

    Self for chaining.

    Example

    obj.fire('test', 'This is the message');

getRenderableHdrFormat

  • getRenderableHdrFormat(
        formats?: number[],
        filterable?: boolean,
        samples?: number,
    ): number

    Get a renderable HDR pixel format supported by the graphics device.

    Note:

    • When the filterable parameter is set to false, this function returns one of the supported formats on the majority of devices apart from some very old iOS and Android devices (99%).
    • When the filterable parameter is set to true, the function returns a format on a considerably lower number of devices (70%).

    Parameters

    • Optionalformats: number[] = ...

      An array of pixel formats to check for support. Can contain:

    • Optionalfilterable: boolean = true

      If true, the format also needs to be filterable. Defaults to true.

    • Optionalsamples: number = 1

      The number of samples to check for. Some formats are not compatible with multi-sampling, for example PIXELFORMAT_RGBA32F on WebGPU platform. Defaults to 1.

    Returns number

    The first supported renderable HDR format or undefined if none is supported.

getRenderTarget

hasEvent

  • hasEvent(name: string): boolean

    Test if there are any handlers bound to an event name.

    Parameters

    • name: string

      The name of the event to test.

    Returns boolean

    True if the object has handlers bound to the specified event name.

    Example

    obj.on('test', () => {}); // bind an event to 'test'
    obj.hasEvent('test'); // returns true
    obj.hasEvent('hello'); // returns false

off

  • off(name?: string, callback?: HandleEventCallback, scope?: any): EventHandler

    Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.

    Parameters

    • Optionalname: string

      Name of the event to unbind.

    • Optionalcallback: HandleEventCallback

      Function to be unbound.

    • Optionalscope: any

      Scope that was used as the this when the event is fired.

    Returns EventHandler

    Self for chaining.

    Example

    const handler = () => {};
    obj.on('test', handler);

    obj.off(); // Removes all events
    obj.off('test'); // Removes all events called 'test'
    obj.off('test', handler); // Removes all handler functions, called 'test'
    obj.off('test', handler, this); // Removes all handler functions, called 'test' with scope this

on

  • on(name: string, callback: HandleEventCallback, scope?: any): EventHandle

    Attach an event handler to an event.

    Parameters

    • name: string

      Name of the event to bind the callback to.

    • callback: HandleEventCallback

      Function that is called when event is fired. Note the callback is limited to 8 arguments.

    • Optionalscope: any = ...

      Object to use as 'this' when the event is fired, defaults to current this.

    Returns EventHandle

    Can be used for removing event in the future.

    Example

    obj.on('test', (a, b) => {
        console.log(a + b);
    });
    obj.fire('test', 1, 2); // prints 3 to the console

    Example

    const evt = obj.on('test', (a, b) => {
        console.log(a + b);
    });
    // some time later
    evt.off();

once

  • once(name: string, callback: HandleEventCallback, scope?: any): EventHandle

    Attach an event handler to an event. This handler will be removed after being fired once.

    Parameters

    • name: string

      Name of the event to bind the callback to.

    • callback: HandleEventCallback

      Function that is called when event is fired. Note the callback is limited to 8 arguments.

    • Optionalscope: any = ...

      Object to use as 'this' when the event is fired, defaults to current this.

    Returns EventHandle

    • can be used for removing event in the future.

    Example

    obj.once('test', (a, b) => {
        console.log(a + b);
    });
    obj.fire('test', 1, 2); // prints 3 to the console
    obj.fire('test', 1, 2); // not going to get handled

postInit

setBlendColor

setBlendState

setCullMode

setDepthState

setIndexBuffer

  • setIndexBuffer(indexBuffer: any): void

    Sets the current index buffer on the graphics device. On subsequent calls to GraphicsDevice#draw, the specified index buffer will be used to provide index data for any indexed primitives.

    Parameters

    • indexBuffer: any

      The index buffer to assign to the device.

    Returns void

setRenderTarget

  • setRenderTarget(renderTarget: any): void

    Sets the specified render target on the device. If null is passed as a parameter, the back buffer becomes the current target for all rendering operations.

    Parameters

    • renderTarget: any

      The render target to activate.

    Returns void

    Example

    // Set a render target to receive all rendering output
    device.setRenderTarget(renderTarget);

    // Set the back buffer to receive all rendering output
    device.setRenderTarget(null);

setStencilState

setVertexBuffer

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