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 boneLimit canvas gpuProfiler insideRenderPass isWebGL1 isWebGL2 isWebGPU maxAnisotropy maxColorAttachments maxCubeMapSize maxTextureSize maxVolumeSize precision samples scope supportsCompute supportsInstancing supportsMrt supportsStorageTextureRead supportsVolumeTextures textureFloatFilterable textureFloatRenderable textureHalfFloatFilterable textureHalfFloatRenderable

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

Properties

backBufferAntialias

backBufferAntialias: boolean = false

True if the back buffer should use anti-aliasing.

ReadonlyboneLimit

boneLimit: number

The maximum number of supported bones using uniform buffers.

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

ReadonlyisWebGL1

isWebGL1: boolean = false

True if the deviceType is WebGL1

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.

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.

ReadonlysupportsCompute

supportsCompute: boolean = false

True if the device supports compute shaders.

ReadonlysupportsInstancing

supportsInstancing: boolean

True if hardware instancing is supported.

ReadonlysupportsMrt

supportsMrt: boolean = false

True if Multiple Render Targets feature is supported. This refers to the ability to render to multiple color textures with a single draw call.

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;

ReadonlysupportsVolumeTextures

supportsVolumeTextures: boolean = false

True if the device supports volume 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.

ReadonlytextureHalfFloatFilterable

textureHalfFloatFilterable: boolean = false

True if filtering can be applied when sampling 16-bit float textures.

ReadonlytextureHalfFloatRenderable

textureHalfFloatRenderable: boolean

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

Accessors

deviceType

fullscreen

height

maxPixelRatio

width

Methods

computeDispatch

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

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

off

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

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

    Returns EventHandler

    Self for chaining.

    Example

    const handler = function () {
    };
    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?: object): 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: object = ...

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

    Example

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

once

  • once(name: string, callback: HandleEventCallback, scope?: object): 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: object = ...

      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', function (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

setRenderTarget

  • setRenderTarget(renderTarget: RenderTarget): 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

    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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