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SetOverlayImageSize Method

Summary
Changes the size of the overlay image for a certain index.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public void SetOverlayImageSize( 
   int index, 
   int width, 
   int height 
) 
- (BOOL)setOverlaySize:(LeadSize)size  
       forImageAtIndex:(NSInteger)index  
                 error:(NSError **)error 
public void setOverlayImageSize( 
  int index,  
  int width,  
  int height 
) 
public: 
void SetOverlayImageSize(  
   int index, 
   int width, 
   int height 
)  
def SetOverlayImageSize(self,index,width,height): 

Parameters

index
The index of the overlay for which to set the image size. This index is zero-based and should be less than or equal to MaxOverlays.

width
New image width in pixels

height
New image height in pixels.

Remarks

This method is available in the (Document/Medical only) Toolkits.

Sets the size of the overlay image for a certain index. If the image already has an overlay image at  index, it will be freed and the overlay size will be set to  width by  height pixels. If the image has no overlay image at  index, a new empty overlay image will be created with size of  width and  height. After calling SetOverlayImageSize, you must call UpdateOverlayBits to allocate the overlay bitmap and set the data.

For more information, refer to Overlay Overview.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void GetOverlayImageExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   // load an image and set an overlay 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "DICOM", "image2.dcm"), 0, CodecsLoadByteOrder.BgrOrGray, 1, 1); 
   RasterImage imageOverlay1 = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ulay1.bmp"), 1, CodecsLoadByteOrder.Rgb, 1, 1); 
   RasterImage imageOverlay2 = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ulay1.bmp"), 1, CodecsLoadByteOrder.Rgb, 1, 1); 
   image.SetOverlayImage(0, imageOverlay1, RasterGetSetOverlayImageMode.Copy); 
   image.SetOverlayImage(1, imageOverlay2, RasterGetSetOverlayImageMode.Copy); 
 
   // update the attributes of one of the overlays 
   RasterOverlayAttributes attributes = image.GetOverlayAttributes(0, 
      RasterGetSetOverlayAttributesFlags.Color | 
      RasterGetSetOverlayAttributesFlags.Flags | 
      RasterGetSetOverlayAttributesFlags.Origin | 
      RasterGetSetOverlayAttributesFlags.BitIndex); 
 
   attributes.Color = new RasterColor(255, 255, 255); 
   attributes.AutoPaint = true; 
   attributes.AutoProcess = true; 
   attributes.Origin = new LeadPoint(5, 5); 
   attributes.BitPosition = image.BitsPerPixel - 1; 
 
   image.UpdateOverlayAttributes( 
      0, 
      attributes, 
      RasterGetSetOverlayAttributesFlags.Color | 
      RasterGetSetOverlayAttributesFlags.Flags | 
      RasterGetSetOverlayAttributesFlags.Origin | 
      RasterGetSetOverlayAttributesFlags.BitIndex); 
 
 
   int count = image.OverlayCount; 
   for (int i = 0; i < count; i++) 
   { 
      using (RasterImage overlayTest = image.GetOverlayImage(i, RasterGetSetOverlayImageMode.NoCopy)) 
      { 
         string fileName = string.Format(Path.Combine(LEAD_VARS.ImagesDir, "overlay{0}_copy.bmp"), i); 
         codecs.Save(overlayTest, fileName, RasterImageFormat.Bmp, 1); 
      } 
   } 
 
   image.Dispose(); 
   imageOverlay1.Dispose(); 
   imageOverlay2.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
Requirements

Target Platforms

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.