Data Event

Summary

Occurs during the ColorResolutionCommand, to provide the converted data.

Syntax

Objective-C

C++/CLI

Java

Python

public event EventHandler<ColorResolutionCommandDataEventArgs> Data

typedef void (^LTColorResolutionCommandDataEvent)(LTRasterImage * _Nullable image, NSInteger lines, NSData *data, BOOL *cancel) 
 
- (BOOL)run:(LTRasterImage *)image  
   progress:(nullable LTRasterCommandProgress)progressHandler  
  dataEvent:(nullable LTColorResolutionCommandDataEvent)dataEventHandler  
      error:(NSError **)error

synchronized public void addColorResolutionCommandDataListener(ColorResolutionCommandDataListener listener) 
synchronized public void removeColorResolutionCommandDataListener(ColorResolutionCommandDataListener listener)

public: 
event EventHandler<ColorResolutionCommandDataEventArgs^>^ Data

def Data(sender,e): # sender: ColorResolutionCommand e: ColorResolutionCommandDataEventArgs

Event Data

The event handler receives an argument of type ColorResolutionCommandDataEventArgs containing data related to this event. The following ColorResolutionCommandDataEventArgs properties provide information specific to this event.

Property	Description
Cancel	Gets or sets a value indicating whether to abort the color resolution command.

Remarks

You can use this event to handle the converted image data that the ColorResolutionCommand has written to a buffer.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void ColorResolutionCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres8.bmp"); 
	string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres4.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// First color-res it to 8 bits per pixel  using the Netscape palette into a seperate image 
	ColorResolutionCommand cmd = new ColorResolutionCommand(); 
	cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage; 
	cmd.BitsPerPixel = 8; 
	cmd.Order = RasterByteOrder.Rgb; 
	cmd.DitheringMethod = RasterDitheringMethod.None; 
	cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette; 
	cmd.SetPalette(RasterPalette.Netscape()); 
	cmd.Run(image); 
 
	RasterImage destImage = cmd.DestinationImage; 
	Assert.IsTrue(destImage.BitsPerPixel == 8); 
 
	// Save it to disk 
	codecs.Save(destImage, destFileName1, RasterImageFormat.Bmp, 8); 
	destImage.Dispose(); 
 
	// Now color-res the image in-place to 4-bits per pixel using the Optimized palette 
	cmd.Mode = ColorResolutionCommandMode.InPlace; 
	cmd.BitsPerPixel = 4; 
	cmd.Order = RasterByteOrder.Rgb; 
	cmd.DitheringMethod = RasterDitheringMethod.None; 
	cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized; 
	cmd.Run(image); 
	Assert.IsTrue(image.BitsPerPixel == 4); 
 
	// Save it to disk 
	codecs.Save(image, destFileName2, RasterImageFormat.Bmp, 4); 
 
	// Clean Up 
	destImage.Dispose(); 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

ColorResolutionCommand Class

ColorResolutionCommand Members

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Help Version 22.0.2023.5.16

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