Image from disc

[wolfgang]

Hi,
is it possible to display only a part of an image which is stored on disk and not loaded to memory? Or much easier, this code should work:

.
.
.
drawer.DrawImage1("myimage",rectSrc.Value,rectDest.Value,false) ' -> error message

 

[Erel]

Your code should work. You should change it to:
drawer.DrawImage1(AppPath & "\myimage",...)
External libraries do not use the default folder.

It will however first load the image to memory.

 

[wolfgang]

Hi Erel,
this is the code and the error message

Sub Globals
   'Declare the global variables here.
End Sub

Sub App_Start
   Form1.Show
   draw.New1("Form1",false)
   rsrc.New1(100,100,238,268)
   rdst.New1(0,0,238,268)
   draw.DrawImage1(AppPath & "\stein50.bmp",rsrc.Value,rdst.Value,false)
   Form1.Refresh
End Sub

The image exits, 100%.

Error description:
"Value may not be ZERO"

 

[Erel]

:signOops:
Drawer.DrawImage1 expects a loaded image.
You should add a bitmap object and use it to first load the image:

bitmap.New1(AppPath & "\yourfile.bmp")
draw.DrawImage1(bitmap.Value,rsrc.Value,rdst.Value,false)

 

[wolfgang]

Hi Erel,
thank you. That’s what I did up to now. But I was looking for a possibility to display a small part of a big (20 MB) image(map) on ppc to save memory. So I have to think about of an “automatic” map changing?!