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AnnHtml5RenderingEngine Object

Summary

Represents the annotation rendering engine implementation for the HTML 5 platform using a Canvas element.

Syntax

TypeScript

JavaScript

function lt.Annotations.Rendering.AnnHtml5RenderingEngine 
	extends lt.Annotations.Engine.AnnRenderingEngine

class lt.Annotations.Rendering.AnnHtml5RenderingEngine() 
	extends AnnRenderingEngine

Remarks

AnnHtml5RenderingEngine is the rendering engine implementation for the HTML 5 platform. This class derives from AnnRenderingEngine and implements the required methods to render annotation objects to an HTML 5 canvas.

The HTML 5 image viewer automation control can create an instance of the AnnHtml5RenderingEngine, and use it to create an automated annotation user interface tied with the LEADTOOLS HTML 5 ImageViewer control.

In addition to the above, this class contains the following members:

Member	Description
Context	This is the destination HTML 5 canvas context 2d object to use when rendering and the annotation objects.
SetFont	Represents a helper method to set an AnnFont in a HTML 5 canvas context
MeasureTextHeight	Represents a helper method to measure the text height of an AnnFont in a HTML 5 canvas context
SetFill	Represents a helper method to set an AnnBrush in a HTML 5 canvas context
SetFillOpacityAndBounds	Represents a helper method to set an AnnBrush with opacity and bounds in a HTML 5 canvas context
SetStroke	Represents a helper method to set an AnnStroke in a HTML 5 canvas context
DrawCurve	Represents a helper method to draw a curve in a HTML 5 canvas context
DrawClosedCurve	Represents a helper method to draw a closed curve in a HTML 5 canvas context
DrawEllipse	Represents a helper method to draw an ellipse in a HTML 5 canvas context
DrawPicture	Represents a helper method to draw an AnnPicture in a HTML 5 canvas context

Requirements

Target Platforms

Reference

AnnHtml5RenderingEngine Members

Leadtools.Annotations.Rendering Namespace

Programming with LEADTOOLS Annotations

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Help Version 21.0.2021.6.30

Leadtools.Annotations.Rendering.JavaScript Assembly

Introduction

Getting Started

Namespaces

Leadtools.Annotations.Rendering Namespace

Assemblies