BurnToRectWithDpi Method

Burns the annotation objects in Container to the destination context and destination rectangle at the specified resolution.

Syntax

JavaScript

 function Leadtools.Annotations.Core.AnnRenderingEngine.burnToRectWithDpi( 
   destinationRect ,
   sourceDpiX ,
   sourceDpiY ,
   targetDpiX ,
   targetDpiY 
)

Parameters

Parameter	Type	Description
destinationRect	LeadRectD	The destination rectangle in container coordinates.
sourceDpiX	double	Horizontal source (screen) DPI.
sourceDpiY	double	Vertical source (screen) DPI.
targetDpiX	double	Horizontal target (image) DPI.
targetDpiY	double	Vertical target (image) DPI.

Remarks

All visible objects in this container will be drawn into the current context.

This method uses the resolution (DPI) values specified and not the values stored in the container. Use this method when burning the container objects into any context.

To burn a container into the context of the image being automated, use Burn.

Example

This example will create a container, adds a couple of objects and then burn it into the viewer

JavaScript

example: function SiteLibrary_DefaultPage$example(viewer) {
   // viewer is ImageViewer this._automation is working on

   // Get the container
   var container = this._automation.get_container();

   var inch = 720.0;

   // Add a red line object, from 1in 1in to 2in 2in
   var lineObj = new lt.Annotations.Core.AnnPolylineObject();
   lineObj.get_points().add(lt.LeadPointD.create(1 * inch, 1 * inch));
   lineObj.get_points().add(lt.LeadPointD.create(2 * inch, 2 * inch));
   lineObj.set_stroke(lt.Annotations.Core.AnnStroke.create(lt.Annotations.Core.AnnSolidColorBrush.create("red"), lt.LeadLengthD.create(1)));
   container.get_children().add(lineObj);

   // Add a blue on yellow rectangle from 3in 3in to 4in 4in
   var rectObj = new lt.Annotations.Core.AnnRectangleObject();
   rectObj.set_rect(lt.LeadRectD.create(3 * inch, 3 * inch, 1 * inch, 1 * inch));
   rectObj.set_stroke(lt.Annotations.Core.AnnStroke.create(lt.Annotations.Core.AnnSolidColorBrush.create("blue"), lt.LeadLengthD.create(1)));
   rectObj.set_fill(lt.Annotations.Core.AnnSolidColorBrush.create("yellow"));
   container.get_children().add(rectObj);

   // To burn the annotations, we need a canvas context and a new rendering engine

   // Get the background canvas of the viewer
   var canvas = viewer.get_backCanvas();
   var context = canvas.getContext("2d");

   // Create a new rendering engine for this container and context
   var renderingEngine = new lt.Annotations.Rendering.AnnHtml5RenderingEngine(container, context, false);

   // Set the resolution
   var dpiX = viewer.get_screenDpiX();
   var dpiY = viewer.get_screenDpiY();
   var xRes = viewer.get_imageDpiX();
   var yRes = viewer.get_imageDpiY();

   // Burn it
   renderingEngine.burnToRectWithDpi(lt.LeadRectD.get_empty(), dpiX, dpiY, xRes, yRes);

   // Delete the objects we added
   this._automation.selectObjects(container.get_children());
   this._automation.deleteSelectedObjects();

   // Invalidate to see the burned objects
   viewer.invalidate();
},

BurnToRectWithDpi Method

Parameters

Reference