BMP's created by ImageMagick will not display in a GUI

[lee321987]

Hello.  Attached are two images converted from the same source image.  One created by Directory Opus and the other created by ImageMagick.

The ImageMagick image will not display in an AutoIt GUI, but those created by other programs work fine (I also tried GIMP and IrfanView converts).

Any idea what's wrong?

My ImageMagick command line:

convert.exe "C:\Program Files (x86)\AutoIt3\Examples\GUI\mslogo.jpg" "imagemagick_convert.bmp"

Example code:

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>

GUICreate("My GUI picture", 350, 300, -1, -1, $WS_SIZEBOX + $WS_SYSMENU)

Local $idPic = GUICtrlCreatePic("DOpus_convert.bmp", 50, 50, 200, 50)
Local $idPic2 = GUICtrlCreatePic("imagemagick_convert.bmp", 50, 120, 200, 50)

GUISetState(@SW_SHOW)

While 1
        Switch GUIGetMsg()
                Case $GUI_EVENT_CLOSE
                        ExitLoop
        EndSwitch
WEnd

GUIDelete()

DOpus_convert.bmp imagemagick_convert.bmp

[ioa747]

from: https://usage.imagemagick.org/formats/#bmp

If you have an older program cannot read the default BMP4 images written by
  ImageMagick, (for example a Windows Background Image), you can enforce the
  generation of a BMP3 format image using...

       magick image BMP3:image.bmp

  This format should have no transparency and should be a 'printable image',
  whatever that means.  In other words 'Windows' compatible.

  However, if a PNG input file was used and it contains a gAMA and cHRM chunk
  (gamma and chromaticity information) either of which forces "magick" to
  write a BMP4. To get a BMP3 you need to get rid of that information. One way
  may be to pipeline the image though a minimal 'image data only' image file
  format like PPM and then re-save as BMP3.  Messy, but it should work.

      magick image.png  ppm:- | magick - BMP3:image.bpm