LoadPsdLayer Method

Summary

Loads the specified layer from the specified PSD file.

Syntax

C++/CLI

Python

public RasterImage LoadPsdLayer( 
   string fileName, 
   int bitsPerPixel, 
   CodecsLoadByteOrder order, 
   int layer, 
   CodecsPsdLayerInfo layerInfo 
)

public: 
RasterImage^ LoadPsdLayer(  
   String^ fileName, 
   int bitsPerPixel, 
   CodecsLoadByteOrder order, 
   int layer, 
   CodecsPsdLayerInfo^ layerInfo 
)

def LoadPsdLayer(self,fileName,bitsPerPixel,order,layer,layerInfo):

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.

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

layerInfo
a CodecsPsdLayerInfo object to be updated with information about the loaded layer. Pass a null reference for this parameter if layer 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 layer from a PSD file. It loads the layer specified in layer.

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

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

Example

This example will create and save a PSD with layers before re-loading the first layer back

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void PsdLayersExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string[] layerFileNames = 
   { 
   Path.Combine(LEAD_VARS.ImagesDir, "Sample1.cmp"), 
   Path.Combine(LEAD_VARS.ImagesDir, "Sample2.cmp"), 
   Path.Combine(LEAD_VARS.ImagesDir, "Sample3.cmp"), 
 }; 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.psd"); 
 
   // Load the layer images (as pages in 1 image) 
   RasterImage layersImage = null; 
   foreach (string layerFileName in layerFileNames) 
   { 
      RasterImage layerImage = codecs.Load(layerFileName); 
      if (layersImage == null) 
         layersImage = layerImage; 
      else 
         layersImage.AddPage(layerImage); 
   } 
 
   // Load the image that is made up of all the layers 
   RasterImage image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.BgrOrGray, 1, 1); 
 
   // Save this image and all the layers 
   codecs.SavePsdWithLayers(image, destFileName, 0, layersImage, null); 
   image.Dispose(); 
   layersImage.Dispose(); 
 
   CodecsImageInfo imageInfo = codecs.GetInformation(destFileName, false); 
   if (imageInfo.Psd.Layers > 0) 
   { 
      int layer = 0; 
      CodecsPsdLayerInfo layerInfo = new CodecsPsdLayerInfo(); 
      RasterImage layerImage = codecs.LoadPsdLayer(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, layer, layerInfo); 
 
      layerInfo.Clipping = 0; 
      layerInfo.Left = 0; 
      layerInfo.LoadMaskImage = true; 
      layerInfo.MaskImage = null; 
      layerInfo.Name = null; 
      layerInfo.Opacity = 0; 
      layerInfo.Top = 0; 
 
      string blendModeKey = Encoding.ASCII.GetString(layerInfo.GetBlendModeKey()); 
 
      Debug.WriteLine("Loaded layer at index {0}, size is {1} by {2}, Blend mode key:{3}", layer, layerImage.Width, layerImage.Height, blendModeKey); 
      Debug.WriteLine("TransparencyProtected is {0}, Visible is {1}, Obsolete is {2} and Psd5OrLater is {3}", 
         layerInfo.TransparencyProtected, layerInfo.Visible, layerInfo.Obsolete, layerInfo.Psd5OrLater); 
 
      char[] byteArray = "dark".ToCharArray(); //Define Blend Mode Key 
      layerInfo.SetBlendModeKey(Encoding.ASCII.GetBytes(byteArray)); 
      Debug.WriteLine("Loaded layer at index {0} with updated Blend mode key:{1}", layer, Encoding.ASCII.GetString(layerInfo.GetBlendModeKey())); 
 
      layerImage.Dispose(); 
   } 
   else 
      Debug.WriteLine("No layers found in this PSD file"); 
 
   // 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

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