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Compression of pictures

Posted on 2000-03-11
Medium Priority
Last Modified: 2010-04-04
when i press printScreen and then go to my program and paste the picture in the clipboard in a DBImage, and save this picturem, i found that this picture takes a large storge capicity, because it's a BMP file in the clipboard,,, What i Want is to paste the picture in the clipboard in the DBImage , but as JPG or GIF format.

Simple Code or Headlines is Preferable.

Thank you all.
Question by:ams4380361
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Expert Comment

ID: 2609108
If You are using Delphi 4 or above,you can simply do it.Delphi 4 includes a unit called jpeg,with this unit ,you can use jpg support in your program.Simply add one statement in the uses clause:jpeg.
 You can use jpeg as below:
  //myjpeg property setting
  //After you get the image you want to save,you can assign the bitmap to the myjpeg
  To gif,you can reference the GIF format document and to build a unit yourself.Or to serach for the right unit.

Author Comment

ID: 2609113
in fact i am using Delphi 3.0, and your method is not pasting the picture from the clipboard to dbimage directly.
LVL 27

Expert Comment

ID: 2609581
hi ams4380361,
what database do you use?
LVL 15

Expert Comment

ID: 2610370

Accepted Solution

saulite earned 150 total points
ID: 2788110
use JPEG unit. When you press Print-Screen, image in memory is a bitmap. You can read it from clipboard, and convert it to JPG.

uses {...}, jpeg


procedure TForm1.SaveClipboardToJPEG(Sender: TObject);
  Jpeg1: TJpegImage;
 if Clipboard.HasFormat(CF_BITMAP) then
   Jpeg1.CompressionQuality:=75;  //quality for compressing 1..100

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