ReadStamp(string,int) Method (original) (raw)
Summary
Reads a thumbnail image stored in the image file.
Syntax
C#
Objective-C
C++/CLI
Python
- (nullable LTRasterImage *)readStampFromFile:(NSString *)file
pageNumber:(NSInteger)_pageNumber_
error:(NSError **)error
Parameters
fileName
A String containing the name of the file which contains the stamp image to load.
pageNumber
1-based index of the page from which the stamp image should be loaded.
Return Value
The RasterImage object that this method loads.
Remarks
Only EXIF, CMP, JPEG, FlashPix, HEIF/HEIC, and PNG formats support stamps. However, not all files of these formats contain stamps. To create a thumbnail image from any file, use ReadThumbnail.
Note
At this time, there are no multipage formats that support stamps.
Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;
public void StampExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_WithCustomStamp.cmp");
string stampFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Stamp.bmp");
// Load the source file name
RasterImage image = codecs.Load(srcFileName);
// Save as the destination image
codecs.Save(image, destFileName, RasterImageFormat.Cmp, 24);
// Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
LeadRect rc = new LeadRect(0, 0, 128, 128);
rc = RasterImage.CalculatePaintModeRectangle(
image.ImageWidth,
image.ImageHeight,
rc,
RasterPaintSizeMode.FitAlways,
RasterPaintAlignMode.Near,
RasterPaintAlignMode.Near);
SizeCommand command = new SizeCommand();
command.Width = rc.Width;
command.Height = rc.Height;
command.Flags = RasterSizeFlags.None;
command.Run(image);
// Add the word "Stamp" on the image at the middle
string message = "Stamp";
using (Leadtools.Drawing.RasterGraphics rg = Leadtools.Drawing.RasterImagePainter.CreateGraphics(image))
{
using (System.Drawing.StringFormat sf = new System.Drawing.StringFormat())
{
sf.Alignment = System.Drawing.StringAlignment.Center;
sf.LineAlignment = System.Drawing.StringAlignment.Center;
using (System.Drawing.Font f = new System.Drawing.Font("Arial", 20, System.Drawing.FontStyle.Bold))
{
System.Drawing.Rectangle rcDraw = new System.Drawing.Rectangle(rc.X, rc.Y, rc.Width, rc.Height);
rg.Graphics.DrawString(message, f, System.Drawing.Brushes.Yellow, rcDraw, sf);
}
}
}
// Now set this image as the stamp for this file
codecs.SaveStamp(image, destFileName, 1, 1, 1, CodecsSavePageMode.Overwrite);
image.Dispose();
// Load the stamp from the file and save it into another file
image = codecs.ReadStamp(destFileName, 1);
codecs.Save(image, stampFileName, RasterImageFormat.Bmp, 24);
image.Dispose();
// Clean up
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
Requirements
See Also
Implementing Extended FlashPix Support
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