TGraphic (Delphi)

Description

This example demonstrates the use of some methods and properties available for TBitmap and TGraphic objects.

Code

procedure TMainForm.btCompareClick(Sender: TObject);
begin
  { Compare the contents of two graphics }	
  if MyImage1.Picture.Graphic.Equals(MyImage2.Picture.Graphic) then
    Memo1.Lines.Add('Same image')
  else
    Memo1.Lines.Add('Different images');
end;

procedure TMainForm.btLoadClick(Sender: TObject);
begin
  OpenPictureDialog1.Execute();
  { Load a picture from a file }
  MyImage2.Picture.LoadFromFile(String(OpenPictureDialog1.FileName));
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  { Change the AlphaFormat property }
  MyImage1.Picture.Bitmap.AlphaFormat := afPremultiplied;
  { Check whether the graphic supports partial transparency.
    This is a read-only property }
  if (MyImage1.Picture.Graphic.SupportsPartialTransparency) then
    Memo1.Lines.Add('The graphic supports partial transparency')
  else
    Memo1.Lines.Add('The graphic does not support partial transparency');
end;

Uses

• Vcl.Graphics.TBitmap.AlphaFormat ( fr | de | ja )
• Vcl.Graphics.TGraphic.Equals ( fr | de | ja )
• Vcl.Graphics.TGraphic.SupportsPartialTransparency ( fr | de | ja )
• Vcl.Graphics.TPicture.LoadFromFile ( fr | de | ja )