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PaletteFlags Property

Summary
Gets or sets the palette flags to use.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public ColorResolutionCommandPaletteFlags PaletteFlags { get; set; } 
@property (nonatomic, assign) LTColorResolutionCommandPaletteFlags paletteFlags; 
public ColorResolutionCommandPaletteFlags getPaletteFlags() 
public void setPaletteFlags(ColorResolutionCommandPaletteFlags value) 
PaletteFlags # get and set (CodecsThumbnailOptions) 

Property Value

The palette flags to use. The default value is None.

Remarks

The PaletteFlags will be passed to ColorResolutionCommand internally when MaintainAspectRatio is true, ForceSize is true, and the source image is not 24-bit. In this case, the thumbnail image is converted to 24-bit, then, combined with a "background" image. The resulting image is then returned to the thumbnail image's original bit-depth using PaletteFlags.

Example
C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void ReadThumbnailExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
   // Create a thumbnail with default options 
   CodecsThumbnailOptions options = CodecsThumbnailOptions.Default; 
   options.LoadStamp = false; 
   RasterImage thumbnail = codecs.ReadThumbnail(srcFileName, options, 1); 
 
   Debug.WriteLine("Thumbnail with default option:"); 
   Debug.WriteLine("  Size: {0} by {1} pixels. Bits/Pixel: {2}", thumbnail.Width, thumbnail.Height, thumbnail.BitsPerPixel); 
   thumbnail.Dispose(); 
 
   // Create a thumbnail with some options 
   options.LoadStamp = false; 
   options.Width = 40; 
   options.Height = 80; 
   options.ForceSize = true; 
   options.MaintainAspectRatio = false; 
   options.BackColor = RasterColor.FromKnownColor(RasterKnownColor.LightBlue); 
   options.BitsPerPixel = 8; 
   options.DitheringMethod = RasterDitheringMethod.None; 
   options.Order = RasterByteOrder.Rgb; 
   options.PaletteFlags = ColorResolutionCommandPaletteFlags.None; 
   options.Resample = false; 
   thumbnail = codecs.ReadThumbnail(srcFileName, options, 1); 
 
   Debug.WriteLine("Thumbnail with set option (size: {0} by {1}, Bits/Pixel: {2}, ForeSize: {3}", 
      options.Width, options.Height, options.BitsPerPixel, options.ForceSize); 
   Debug.WriteLine("  Size: {0} by {1} pixels. Bits/Pixel: {2}", thumbnail.Width, thumbnail.Height, thumbnail.BitsPerPixel); 
   thumbnail.Dispose(); 
 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
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.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
public void readThumbnailExample() throws IOException { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
 
   // Create a thumbnail with default options 
   CodecsThumbnailOptions options = CodecsThumbnailOptions.getDefault(); 
   options.setLoadStamp(false); 
   ILeadStream srcFileStream = LeadStreamFactory.create(srcFileName); 
   RasterImage thumbnail = codecs.readThumbnail(srcFileStream, options, 1); 
 
   System.out.println("Thumbnail with default option:"); 
   System.out.println("  Size: " + thumbnail.getWidth() + " by " + thumbnail.getHeight() + " pixels. Bits/Pixel: " 
         + thumbnail.getBitsPerPixel()); 
   thumbnail.dispose(); 
 
   // Create a thumbnail with some options 
   options.setLoadStamp(false); 
   options.setWidth(40); 
   options.setHeight(80); 
   options.setForceSize(true); 
   options.setMaintainAspectRatio(false); 
   options.setBackColor(RasterColor.fromKnownColor(RasterKnownColor.LIGHT_BLUE)); 
   options.setBitsPerPixel(8); 
   options.setDitheringMethod(RasterDitheringMethod.NONE); 
   options.setOrder(RasterByteOrder.RGB); 
   options.setPaletteFlags(ColorResolutionCommandPaletteFlags.NONE); 
   options.setResample(false); 
   thumbnail = codecs.readThumbnail(srcFileStream, options, 1); 
 
   assertTrue("Incorrect dithering method", options.getDitheringMethod().equals(RasterDitheringMethod.NONE)); 
   System.out.println("Correct dithering method was used"); 
 
   System.out.printf("Thumbnail with set option (size: %s by %s, Bits/Pixel: %s, ForeSize: %s%n", 
         options.getWidth(), options.getHeight(), options.getBitsPerPixel(), options.getForceSize()); 
   System.out.printf("  Size: %s by %s pixels. Bits/Pixel: %s%n", thumbnail.getWidth(), thumbnail.getHeight(), 
         thumbnail.getBitsPerPixel()); 
   thumbnail.dispose(); 
 
   srcFileStream.close(); 
   codecs.dispose(); 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

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