API Reference > imodeljs-frontend > Rendering Rendering Classes for rendering the contents of views. Classes Name Description DecorateContext Provides context for a Decorator to add Decorations to be rendered within a Viewport. Decorations A set of RenderGraphics and CanvasDecorations produced by Tools and Decorators, used to decorate the contents of a Viewport. DynamicsContext Provides context for an InteractiveTool to display decorations representing its current state. EmphasizeElements An implementation of FeatureOverrideProvider for emphasizing selected elements through simple color/transparency appearance overrides. Beta GraphicBranch A node in a scene graph. GraphicBuilder Provides methods for constructing a RenderGraphic from geometric primitives. RenderClipVolume An opaque representation of a clip volume applied to geometry within a Viewport. Beta RenderContext Provides context for producing RenderGraphics for drawing within a Viewport. RenderGraphic Abstract representation of an object which can be rendered by a RenderSystem. RenderGraphicOwner A graphic that owns another graphic. RenderSystem A RenderSystem provides access to resources used by the internal WebGL-based rendering system. Enumerations Name Description ClippingType Describes the type of a RenderClipVolume. Beta FeatureOverrideType Whether override includes both color and alpha, only color, or only alpha. Beta GraphicType Describes the type of a GraphicBuilder, which defines the coordinate system in which the builder's geometry is defined and Global Functions Name Description canvasToImageBuffer Create an ImageBuffer in the specified format with the same dimensions and contents as a canvas. canvasToResizedCanvasWithBars Resize a canvas to a desired size. extractImageSourceDimensions Extract the dimensions of the jpeg or png data encoded in an ImageSource. getCenteredViewRect Determine maximum ViewRect that can be fitted and centered in specified ViewRect given a required aspect ratio. Beta getCompressedJpegFromCanvas Produce a jpeg compressed to no more than specified bytes and of no less than specified quality. Beta getImageSourceFormatForMimeType Get the ImageSourceFormat corresponding to the mime type string, or undefined if the string does not identify a supported ImageSourceFormat. getImageSourceMimeType Get a string describing the mime type associated with an ImageSource format. imageBufferToBase64EncodedPng Converts the contents of an ImageBuffer to PNG format. imageBufferToCanvas Create a canvas element with the same dimensions and contents as an image buffer. imageBufferToPngDataUrl Produces a data url in "image/png" format from the contents of an ImageBuffer. imageElementFromImageSource Extract an html Image element from a binary jpeg or png. imageElementFromUrl Create an html Image element from a URL. openImageDataUrlInNewWindow Open an image specified as a data URL in a new window/tab. Beta Interfaces Name Description AppearanceOverrideProps Beta CanvasDecoration A Decoration that is drawn onto the EmphasizeElementsProps Beta RenderSystem.Options Options passed to IModelApp.supplyRenderSystem to configure the RenderSystem on startup. Beta RenderSystemDebugControl An interface optionally exposed by a RenderSystem that allows control of various debugging features. Beta RenderTargetDebugControl An interface optionally exposed by a RenderTarget that allows control of various debugging features. Beta Namespaces Name Description FeatureSymbology Contains types that enable an application to customize how Features are drawn within a Viewport. Pixel Describes aspects of a pixel as read from a Viewport. Beta Type Aliases Name Description CanvasDecorationList An array of CanvasDecorations. GraphicList An array of RenderGraphics. Last Updated: 13 June, 2024