Display a TBitmap in original resolution

[Renate Schaaf 64]

I'm not all that familiar with FMX. So I'm trying to have a TImage display a TBitmap so I see the "exact" original, and I also want the image to resize to the correct dimensions of the bitmap.

This is what I have come up with, but it seems overly complicated:

 

procedure DisplayInOriginalSize_AndSizeToFit(const bmp: TBitmap; im: TImage);
var
  ScaleInv: single;
begin
  im.WrapMode := TImageWrapMode.Original;
  ScaleInv := 1 / im.Scene.GetSceneScale;
  // ScaleInv:=1/Screen.Displays[0].Scale;
  im.SetBounds(im.Position.X, im.Position.Y, bmp.Width * ScaleInv,
    bmp.Height * ScaleInv);
  im.Bitmap.Assign(bmp);
  im.Bitmap.BitmapScale := 1;
end;

The commented line works too for me, but it wouldn't in a multiple-monitor-setting.

 

There must be an easier way to set the exact pixel dimensions of a control.

 

Thanks, Renate

[programmerdelphi2k 237]

question:

• and if you place a TImage in a form (or another container), define this container to occupy the entire screen (or the desired size), and, in the TImage, activate the option to use the entire client area of this container.
• So the TImage properties (like WrapMode) can be set to fill this entire area, dont?
• there is TImageViewer too...

Edited May 4, 2023 by programmerdelphi2k

[Renate Schaaf 64]

5 minutes ago, programmerdelphi2k said:

and if you place a TImage in a form (or another container), define this container to occupy the entire screen (or the desired size), and, in the TImage, activate the option to use the entire client area of this container.

How does this relate to my question?

[programmerdelphi2k 237]

1 hour ago, Renate Schaaf said:

How does this relate to my question?

if dont, sorry!

look my post... calculate font scale  

 

Edited May 4, 2023 by programmerdelphi2k

[Patrick PREMARTIN 72]

As I understand you want your TImage has the same Width/Height than your Bitmap without interest in pixel depth ?

 

In that case, try this :

procedure DisplayInOriginalSize_AndSizeToFit(const bmp: TBitmap; im: TImage);
begin
  im.Bitmap.Assign(bmp);
  im.With := im.Bitmap.Width;
  im.Height := im.Bitmap.Height;
// or SetSize()
  im.Bitmap.BitmapScale := 1;
end;

[Renate Schaaf 64]

6 hours ago, Patrick PREMARTIN said:

im.With := im.Bitmap.Width;

This will scale the image by the desktop-DPI. For example my desktop-display is set at 200%. The bitmap is displayed in original size because of im.Wrapmode = Orignal. But the Image will be twice as large as its bitmap, and the scrollbox it's in will have a scrollbar-range which is too big . I have corrected that by dividing the width by im.scene.scale, which works. I was just wondering, whether there isn't a simpler way.

Edited May 4, 2023 by Renate Schaaf

[Patrick PREMARTIN 72]

Perhaps you can put the TImage in a TScaledLayout or simply use its Scale property after having a TImage.Size=TBitmap.Size in pixels ?