LEADTOOLS JavaScript (Leadtools.Annotations.Rendering)
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function Leadtools.Annotations.Rendering.AnnHtml5RenderingEngine()
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AnnHtml5RenderingEngine is the rendering engine implementation for the HTML 5 platform. This class derives from Leadtools.Annotations.Core.AnnRenderingEngine and implements the required methods to render annotation objects to an HTML 5 canvas.
The HTML 5 Leadtools.Annotations.Automation.ImageViewerAutomationControl object creates an instance of the AnnHtml5RenderingEngine and uses it to create an automated annotation user interface tied with the LEADTOOLS HTML 5 Leadtools.Controls.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 Leadtools.Annotations.Core.AnnFont in a HTML 5 canvas context |
| MeasureTextHeight |
Represents a helper method to measure the text height of an Leadtools.Annotations.Core.AnnFont in a HTML 5 canvas context |
| SetFill |
Represents a helper method to set an Leadtools.Annotations.Core.AnnBrush in a HTML 5 canvas context |
| SetStroke |
Represents a helper method to set an Leadtools.Annotations.Core.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 Leadtools.Annotations.Core.AnnPicture in a HTML 5 canvas context |