CodecsPngOptions Class

Summary

Provides extra options for loading and saving PNG images.

Syntax

Objective-C

C++/CLI

Java

Python

public class CodecsPngOptions

@interface LTCodecsPngOptions : NSObject

public class CodecsPngOptions

public ref class CodecsPngOptions

class CodecsPngOptions:

Example

using Leadtools; 
using Leadtools.Codecs; 
 
using Leadtools.ImageProcessing.Core; 
 
public void CodecsPngOptionsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   RasterImage image = codecs.Load(srcFileName); 
 
   codecs.Options.Png.Load.SetTrnsChunk(codecs.Options.Png.Load.GetTrnsChunk()); // CodecsPngOptions & CodecsPngLoadOptions reference 
 
   // save with maximum quality 
   codecs.Options.Png.Save.QualityFactor = 1; // CodecsPngSaveOptions reference 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "quality.png"), RasterImageFormat.Png, image.BitsPerPixel); 
 
   // save with maximum compression 
   codecs.Options.Png.Save.QualityFactor = 9; 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "compression.png"), RasterImageFormat.Png, image.BitsPerPixel); 
 
   // calculate the stamp size to fit into 320 by 240 pixels keeping the aspect ratio 
   LeadRect rc = new LeadRect(0, 0, 320, 240); 
   rc = RasterImage.CalculatePaintModeRectangle(image.ImageWidth, image.ImageHeight, rc, 
      RasterPaintSizeMode.FitAlways, RasterPaintAlignMode.Near, RasterPaintAlignMode.Near); 
   codecs.Options.Png.Save.QualityFactor = 4; 
   codecs.Options.Png.Save.SaveWithStamp = true; 
   codecs.Options.Png.Save.StampWidth = rc.Width; 
   codecs.Options.Png.Save.StampHeight = rc.Height; 
   codecs.Options.Png.Save.StampBitsPerPixel = 24; 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "WithStamp.png"), RasterImageFormat.Png, image.BitsPerPixel); 
 
   // Clean up 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

CodecsPngOptions Members

Leadtools.Codecs Namespace

PNG Files and Transparency

Download our FREE evaluation

Help Version 22.0.2023.5.5

Leadtools.Codecs Assembly

Introduction

Getting Started

Namespaces

Leadtools.Codecs Namespace

Assemblies