LoadPsdChannel Method

Summary

Loads the specified channel from the specified PSD file.

Syntax

C++/CLI

Python

public RasterImage LoadPsdChannel( 
   string fileName, 
   int bitsPerPixel, 
   CodecsLoadByteOrder order, 
   int channelIndex, 
   CodecsPsdChannelInfo channelInfo 
)

public: 
RasterImage^ LoadPsdChannel(  
   String^ fileName, 
   int bitsPerPixel, 
   CodecsLoadByteOrder order, 
   int channelIndex, 
   CodecsPsdChannelInfo^ channelInfo 
)

def LoadPsdChannel(self,fileName,bitsPerPixel,order,channelIndex,channelInfo):

Parameters

fileName
A String containing the name of the image file to load.

bitsPerPixel
Resulting image pixel depth. Valid values are:

Value	Meaning
0	Keep the original file's pixel depth (Do not convert).
1 to 8	The specified bits per pixel in the resulting image.
12	12 bits per pixel in the resulting image.
16	16 bits per pixel in the resulting image.
24	24 bits per pixel in the resulting image.
32	32 bits per pixel in the resulting image.
48	48 bits per pixel in the resulting image.
64	64 bits per pixel in the resulting image.

order
The desired color order.

channelIndex
Index of the channel to load. This index is zero-based. Pass 0 to load the first channel, 1 to load the second channel, etc.

channelInfo
a CodecsPsdChannelInfo object to be updated with information about the loaded channel. Pass a null reference for this parameter if channel information is not needed.

Return Value

The RasterImage object that this method loads.

Remarks

Use this method to load PSD files only.

This method works similarly to a normal Load or LoadAsync methods, except that it loads only a channel from a PSD file. It loads the channel specified in channelIndex.

Before calling this method, you may need to get or set file information, such as the number of channels on the file. Refer to CodecsPsdImageInfo.

The number of channels in a file is indicated in CodecsPsdImageInfo.Channels. If this number is 0, the file does not contains any channels and this method should not be called.

Example

This example loads all channels from a PSD file

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void LoadPsdChannels() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.psd"); 
 
   CodecsImageInfo imageInfo = codecs.GetInformation(srcFileName, false); 
   for (int iCount = 0; iCount < imageInfo.Psd.Channels; iCount++) 
   { 
      CodecsPsdChannelInfo ChannelInfo = new CodecsPsdChannelInfo(); 
      RasterImage ChannelImage = codecs.LoadPsdChannel(srcFileName, 0, CodecsLoadByteOrder.Rgb, iCount, ChannelInfo); 
 
      Debug.WriteLine("Channel type: {0}, Channel name: {1}, ChannelImage Pixel Color (0,0): {2}", ChannelInfo.ChannelType, ChannelInfo.Name, ChannelImage.GetPixelColor(0, 0)); 
 
      string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Channel_"); 
      destFileName = destFileName + iCount + ".Bmp"; 
 
      codecs.Save(ChannelImage, destFileName, RasterImageFormat.Bmp, ChannelImage.BitsPerPixel); 
 
      ChannelImage.Dispose(); 
   } 
   // Clean up  
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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