Alpha Property

Summary

Gets or sets the alpha component value.

Syntax

Objective-C

C++/CLI

Java

Python

public int Alpha { get; set; }

@property (nonatomic, assign) NSUInteger alpha

public int getAlpha() 
public void setAlpha(int value)

public: 
property int Alpha { 
   int get(); 
   void set (    int ); 
}

Alpha # get and set (SetAlphaValuesCommand)

Property Value

The alpha component value

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void SetAlphaValuesCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "SetAlphaValuesCommand.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// Convert the image to 32-bits/pixel 
	ColorResolutionCommand colorResolution = new ColorResolutionCommand( 
	   ColorResolutionCommandMode.InPlace, 
	   32, 
	   RasterByteOrder.Bgr, 
	   RasterDitheringMethod.None, 
	   ColorResolutionCommandPaletteFlags.None, 
	   null); 
	colorResolution.Run(image); 
	Assert.IsTrue(image.BitsPerPixel == 32); 
 
	// Set the alpha values 
	SetAlphaValuesCommand setAlphaValues = new SetAlphaValuesCommand(); 
	setAlphaValues.Alpha = 128; 
	setAlphaValues.Run(image); 
 
	// Save the image back to disk 
	codecs.Save(image, destFileName, RasterImageFormat.Bmp, 32); 
 
	// Clean Up 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.*; 
 
 
public void setAlphaValuesCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "rgsref.cmp"); 
   String destFileName = combine(LEAD_VARS_IMAGES_DIR, "SetAlphaValuesCommand.bmp"); 
 
   // Load the source image from disk 
   RasterImage image = codecs.load(srcFileName); 
 
   // Convert the image to 32-bits/pixel 
   ColorResolutionCommand colorResolution = new ColorResolutionCommand(ColorResolutionCommandMode.IN_PLACE, 
         32, RasterByteOrder.BGR, RasterDitheringMethod.NONE, ColorResolutionCommandPaletteFlags.NONE.getValue(), 
         null); 
   colorResolution.run(image); 
   assertTrue(image.getBitsPerPixel() == 32); 
 
   // Set the alpha values 
   SetAlphaValuesCommand setAlphaValues = new SetAlphaValuesCommand(); 
   setAlphaValues.setAlpha(128); 
   setAlphaValues.run(image); 
 
   // Save the image back to disk 
   codecs.save(image, destFileName, RasterImageFormat.BMP, 32); 
 
   assertTrue("file unsuccessfully saved to " + destFileName, (new File(destFileName)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName); 
 
   // Clean Up 
   image.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

SetAlphaValuesCommand Class

SetAlphaValuesCommand Members

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Help Version 23.0.2024.5.22

Leadtools Assembly

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Leadtools Namespace

Leadtools.ImageProcessing Namespace

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