PremultiplyAlphaValuesCommand Class

Summary

Converts the image data to or from premultiplied alpha values.

Syntax

Objective-C

C++/CLI

Java

Python

public class PremultiplyAlphaValuesCommand : RasterCommand

@interface LTPremultiplyAlphaValuesCommand : LTRasterCommand

public class PremultiplyAlphaValuesCommand extends RasterCommand

public ref class PremultiplyAlphaValuesCommand : public RasterCommand

class PremultiplyAlphaValuesCommand(RasterCommand):

Remarks

This command only works with images that are 32 or 64-bit bits per pixel.

Example

This example will load a 32-bit PNG image, and then convert the data to premultiplied alpha values.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void PremultiplyAlphaValuesCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "LittleGFlyingAlpha.png"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "PremultiplyAlphaValuesCommand.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
	Debug.Assert(image.BitsPerPixel == 32); 
 
	// Convert the image data to premultiplied alpha values 
	PremultiplyAlphaValuesCommand cmd = new PremultiplyAlphaValuesCommand(); 
	cmd.ConvertToPremultipliedValues = true; 
	cmd.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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

PremultiplyAlphaValuesCommand Members

Leadtools.ImageProcessing Namespace

Download our FREE evaluation

Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies