BurnToRectWithDpi Method (original) (raw)
Summary
Burns the annotation objects in Container to the destination context and destination rectangle at the specified resolution.
Syntax
C#
Objective-C
C++/CLI
Java
Python
Parameters
destinationRect
The destination rectangle in container coordinates.
sourceDpiX
Horizontal source (image) DPI.
sourceDpiY
Vertical source (image) DPI.
targetDpiX
Horizontal target (screen) DPI.
targetDpiY
Vertical target (screen) DPI.
Example
This example will create a container, add a couple of objects and then burn it into the viewer
using Leadtools.Annotations.Automation;
using Leadtools.Annotations.Engine;
using Leadtools.Annotations.Rendering;
using Leadtools.Codecs;
using Leadtools.Annotations;
using Leadtools.WinForms;
public void AnnRenderingEngine_BurnToRectWithDpi(/*RasterImage image*/)
{
// _viewer is ImageViewer _automation is working on
// Get the container
AnnContainer container = _automation.Container;
RasterImage image = _viewer.Image;
double inch = 720.0;
// Add a red line object, from 1in 1in to 2in 2in
AnnPolylineObject lineObj = new AnnPolylineObject();
lineObj.Points.Add(LeadPointD.Create(1 * inch, 1 * inch));
lineObj.Points.Add(LeadPointD.Create(2 * inch, 2 * inch));
lineObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Red"), LeadLengthD.Create(1));
container.Children.Add(lineObj);
// Add a blue on yellow rectangle from 3in 3in to 4in 4in
AnnRectangleObject rectObj = new AnnRectangleObject();
rectObj.Rect = LeadRectD.Create(3 * inch, 3 * inch, 1 * inch, 1 * inch);
rectObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Blue"), LeadLengthD.Create(1));
rectObj.Fill = AnnSolidColorBrush.Create("Yellow");
container.Children.Add(rectObj);
IAnnAutomationControl annAutomationControl = _automation.AutomationControl;
RasterColor[] colors = image.GetPalette();
IntPtr hDC = Leadtools.Drawing.RasterImagePainter.CreateLeadDC(image);
if (hDC != null)
{
using (Graphics g = Graphics.FromHdc(hDC))
{
// Create a new rendering engine for this container and context
AnnWinFormsRenderingEngine renderingEngine = new AnnWinFormsRenderingEngine(container, g);
// Set the resolution
double dpiX = g.DpiX;
double dpiY = g.DpiY;
double xRes = annAutomationControl.AutomationDpiX;
double yRes = annAutomationControl.AutomationDpiY;
// Burn it
renderingEngine.BurnToRectWithDpi(LeadRectD.Empty, dpiX, dpiY, xRes, yRes);
}
Leadtools.Drawing.RasterImagePainter.DeleteLeadDC(hDC);
}
// Delete the objects we added
_automation.SelectObjects(container.Children);
_automation.DeleteSelectedObjects();
// Invalidate to see the burned objects
_automation.Invalidate(LeadRectD.Empty);
}