SaveImage Event (original) (raw)
Summary
Occurs during the file save process to provide functionality for manually handling the output image data or monitoring a progress status.
Syntax
synchronized public void addSaveImageListener(CodecsSaveImageListener listener)
synchronized public void removeSaveImageListener(CodecsSaveImageListener listener)
public:
event EventHandler<CodecsSaveImageEventArgs^>^ SaveImage
def SaveImage(sender,e): # sender: RasterCodecs e: CodecsSaveImageEventArgs Event Data
The event handler receives an argument of type CodecsSaveImageEventArgs containing data related to this event. The following CodecsSaveImageEventArgs properties provide information specific to this event.
| Property | Description |
|---|---|
| Buffer | Gets the memory buffer containing one or more lines of output image data that the you must provide. |
Example
This example will double the density of an image as it is being saved.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;
public void SaveImageExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_SaveImage.cmp");
// Load the source file (make sure to load as 24 bits/pixel)
RasterImage image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1);
// Instruct RasterCodecs to generate the saved scanlines data for us to manipulate
codecs.Options.Save.RetrieveDataFromImage = true;
// Add a handler to the SaveImage event
codecs.SaveImage += new EventHandler<CodecsSaveImageEventArgs>(codecs_SaveImage);
// Save the image
codecs.Save(image, destFileName, RasterImageFormat.Cmp, 24);
codecs.SaveImage -= new EventHandler<CodecsSaveImageEventArgs>(codecs_SaveImage);
image.Dispose();
// Clean up
codecs.Dispose();
}
private void codecs_SaveImage(object sender, CodecsSaveImageEventArgs e)
{
// This example works with images saved as 24-bit per pixel only
Debug.Assert(e.Image.BitsPerPixel == 24);
e.Cancel = false;
if (e.Row == 0)
{
// Show information about the image being saved
Debug.WriteLine("Saving an image with {0} bpp to {1}", e.Image.BitsPerPixel, e.FileName);
Debug.WriteLine("Offset: {0}, OffsetValid: {1}", e.Offset, e.OffsetValid);
Debug.WriteLine("Page: {0} of {1}", e.Page, e.LastPage - e.FirstPage + 1);
Debug.WriteLine("Page percent: {0}%, Total percent: {1}%, Image Page: {2}", e.PagePercent, e.TotalPercent, e.ImagePage);
if(e.Stream != null)
{
Debug.WriteLine("Stream: {0}", e.Stream);
}
}
Debug.WriteLine("Row: {0}, Lines {1}", e.Row, e.Lines);
// Get the scanlines from the image
int scanlineLength = e.Image.BytesPerLine;
byte[] scanline = new byte[scanlineLength];
// Loop through all the scanlines in the data
for (int y = 0; y < e.Lines; y++)
{
// Get this row
e.Buffer.GetData(y * scanlineLength, scanline, 0, scanlineLength);
// We got the data, now double the intensity
// Remember, this is 24-bits/pixel
for (int x = 0; x < scanlineLength; x++)
{
scanline[x] *= 2;
}
// Copy it back to the event buffer
e.Buffer.SetData(y * scanlineLength, scanline, 0, scanlineLength);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
Leadtools.Codecs Assembly
CompactFile(Stream,Stream,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(Stream,Stream,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method
CompactFile(string,string,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(string,string,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method