Properties · Methods · Events · Demos · Examples

Declaration

TImageEnIO = class(TComponent);

Description

TImageEnIO provides input/output support to ImageEn:
◼Loading and saving images
◼Access to image properties and meta-data
◼Acquisition of images from cameras and scanners
◼Printing
◼DirectShow functions for multimedia support

See also: TImageEnMIO, which works with multiple frame images (e.g. animated GIFs)




Generally you will not add a TImageEnIO component directly to your project. It is accessed via the following methods:

1. Using the IO property of a TImageEnView

ImageEnView1.IO.LoadFromFile('C:\MyImage.jpeg');
ImageEnView1.IO.DoPrintPreviewDialog();

2. Using the IO helper property of a TIEBitmap, TBitmap or TImage

// Scan an image and save to file
bmp := TIEBitmap.Create();
if bmp.IO.Acquire() then
  bmp.IO.SaveToFile( 'D:\scan.pdf' );
bmp.Free;

3. Attached to a TIEBitmap or TBitmap in code

// Scan an image and save to file
bmp := TBitmap.Create();
io := TImageEnIO.CreateFromBitmap(bmp);
if io.Acquire() then
  io.SaveToFile( 'D:\scan.pdf' );
io.Free();
bmp.Free();

4. Attached to a TImage

Note: In this case a TImageEnIO would be added to the form and the AttachedTImage set appropriately.

Notes
◼Ensure you do not call any TImageEnIO methods before it is actually attached to an image container (TImageEnView, TIEBitmap, etc)
◼For the TImageEnMView component use a TImageEnMIO rather than a TImageEnIO

Demos

Examples

// Convert a PNG to JPEG at 90% quality
ImageEnView1.IO.LoadFromFile('D:\image.png');
ImageEnView1.IO.Params.JPEG_Quality := 90;
ImageEnView1.IO.SaveToFile('D:\output.jpg');

// Save a TIFF with CMYK
ImageEnView1.IO.LoadFromFile('D:\image.tif');
ImageEnView1.IO.Params.TIFF_PhotometInterpret := ioTIFF_CMYK;
ImageEnView1.IO.SaveToFile('D:\image-cmyk.tif');

// Scan an image at 300dpi
ImageEnView1.IO.AcquireParams.YResolution := 300;
ImageEnView1.IO.AcquireParams.XResolution := 300;
ImageEnView1.IO.Acquire();

// Enable duplexing on the current scanner
ImageEnView1.IO.AcquireParams.DuplexEnabled := True;

// Show advanced GIF saving properties
ImageEnView1.IO.SimplifiedParamsDialogs := False;
ImageEnView1.IO.DoPreviews([ppGIF]);

// Prompt to print the current image
ImageEnView1.IO.DoPrintPreviewDialog( iedtDialog );

Methods and Properties

Connected Component

Generic Input/Output

Image Acquisition (Twain/WIA)

Aynchronous Input/Output

Video Capture

Dialogs

Printing

Format-Specific Methods

Adobe PDF

Adobe PSD

AVI Videos

BMP

BmpRaw (a true "raw" bitmap format, not a camera Raw file)

Camera Raw Files

Cursors (CUR)

DICOM Medical Imaging Format

GIF

Icons (ICO)

IEN (ImageEn native image format with layers)

JPEG

JPEG 2000

Media Files (AVI, MPEG, WMV..)

Meta Files (WMF, EMF)

Microsoft HD Photos/JPEG XR (WDP/JXR/HDP)

PCX and DCX (Multipage PCX)

PNG

PostScript (PS)

PXM (PPM, PBM, PGM)

SVG (Scalable Vector Graphics)

Targa (TGA)

TIFF

WebP

WBMP

WIC Plug-In Formats (such as HEIF/HEIC, DirectDraw Surface, etc)

ZIP

Events

---