Transparent bitmap on GUI

[Firex]

Good day, I was confused.

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#Include <GDIPlus.au3>
#Include <WinAPIEx.au3>
#Include <APIConstants.au3>
#include <GUIConstants.au3>

_GDIPlus_Startup()

$_hGUI_Dlg = GUICreate( '', 250, 250, -1, -1, $WS_POPUP, BitOR( $WS_EX_TRANSPARENT, $WS_EX_TOPMOST, $WS_EX_TOOLWINDOW, $WS_EX_LAYERED ))
GUISetBkColor($GUI_BKCOLOR_TRANSPARENT, $_hGUI_Dlg)
GUISetState(@SW_SHOW, $_hGUI_Dlg)

$_hGraphic = _GDIPlus_GraphicsCreateFromHWND( $_hGUI_Dlg )
$_hBitmap = _GDIPlus_BitmapCreateFromGraphics( 250, 250, $_hGraphic )
$_hBuffer = _GDIPlus_ImageGetGraphicsContext($_hBitmap)
;_GDIPlus_GraphicsSetSmoothingMode( $_hBuffer, 2 )
;DllCall($ghGDIPDll, "uint", "GdipSetInterpolationMode", "handle", $_hBuffer, "int", 7)
;DllCall($ghGDIPDll, "uint", "GdipSetTextRenderingHint", "handle", $_hBuffer, "int", 4)
; ---
$_hDC = _WinAPI_GetDC($_hGUI_Dlg)
$_hCompatibleDC = _WinAPI_CreateCompatibleDC($_hDC)

$tSize = DllStructCreate($tagSIZE)
$pSize = DllStructGetPtr($tSize)
DllStructSetData($tSize, "X", 250)
DllStructSetData($tSize, "Y", 250)
$tSource = DllStructCreate($tagPOINT)
$pSource = DllStructGetPtr($tSource)
$tBlend = DllStructCreate($tagBLENDFUNCTION)
$pBlend = DllStructGetPtr($tBlend)
DllStructSetData($tBlend, "Alpha", 0)
DllStructSetData($tBlend, "Format", 0)

$_hPen = _GDIPlus_PenCreate(0xFFE0E000, 20) ;And after try 22E0E000 :C
While 1
   If GUIGetMsg() = -3 Then _
      _Quit()

   _GDIPlus_GraphicsClear($_hBuffer, 0x00000000)

   _GDIPlus_GraphicsDrawLine( $_hBuffer, 125, 0, 125, 250, $_hPen )

   $gdibitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($_hBitmap, 0x00000000)
   _WinAPI_SelectObject($_hCompatibleDC, $gdibitmap)
   _WinAPI_UpdateLayeredWindow($_hGUI_Dlg, $_hDC, 0, $pSize, $_hCompatibleDC, $pSource, 0, $pBlend, 1)
   _WinAPI_DeleteObject($gdibitmap)
   ;_WinAPI_BitBlt($_hDC, 0, 0, 250, 250, $_hCompatibleDC, 0, 0, $SRCCOPY ); 0x00CC0020) ;0x00CC0020 = $SRCCOPY
   Sleep( 20 )
WEnd

Func _Quit()
   _WinAPI_ReleaseDC($_hGUI_Dlg, $_hDC)
   _WinAPI_ReleaseDC($_hGUI_Dlg, $_hCompatibleDC)
   _WinAPI_DeleteDC($_hDC)
   _WinAPI_DeleteDC($_hCompatibleDC)
   ; ---
   _GDIPlus_GraphicsDispose($_hBuffer)
   _GDIPlus_BitmapDispose($_hBitmap)
   _GDIPlus_GraphicsDispose($_hGraphic)
   ; ---
   _GDIPlus_Shutdown()
   GuiDelete($_hGUI_Dlg)

   Exit
EndFunc

50% transparent line(_GDIPlus_GraphicsDrawLine)(and also image) with a fully transparent background (Bitmap). Is this possible?

[Artisan]

It's certainly possible.  I've messed around with GDI, GDI+, and WINAPI stuff and haven't figured it out yet.  Look up _WinAPI_SetLayeredWindowAttributes() in the helpfile and try its example.  I know it doesn't use GDI+, but it's a good example using layered windows.  I'm sure someone here can help you figure out how to draw a transparent image & line using GDI+.

[UEZ]

Try this:

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#Include <GDIPlus.au3>
#Include <WinAPIEx.au3>
#Include <APIConstants.au3>
#include <GUIConstants.au3>
 
_GDIPlus_Startup()
 
$_hGUI_Dlg = GUICreate( '', 250, 250, -1, -1, $WS_POPUP, BitOR( $WS_EX_LAYERED , $WS_EX_TOPMOST ,  $WS_EX_TOOLWINDOW ))
GUISetState(@SW_SHOW, $_hGUI_Dlg)
 
$_hBitmap = DllCall($ghGDIPDll, "uint", "GdipCreateBitmapFromScan0", "int", 250, "int", 250, "int", 0, "int", $GDIP_PXF32ARGB, "ptr", 0, "int*", 0)
$_hBitmap = $_hBitmap[6]
$_hBuffer = _GDIPlus_ImageGetGraphicsContext($_hBitmap)
$_hPen = _GDIPlus_PenCreate(0xA0E0E000, 20) ;And after try 22E0E000 :C
_GDIPlus_GraphicsDrawLine( $_hBuffer, 125, 0, 125, 250, $_hPen )
 
$_hDC = _WinAPI_GetDC($_hGUI_Dlg)
$_hCompatibleDC = _WinAPI_CreateCompatibleDC($_hDC)
$tSize = DllStructCreate($tagSIZE)
$pSize = DllStructGetPtr($tSize)
DllStructSetData($tSize, "X", 250)
DllStructSetData($tSize, "Y", 250)
$tSource = DllStructCreate($tagPOINT)
$pSource = DllStructGetPtr($tSource)
$tBlend = DllStructCreate($tagBLENDFUNCTION)
$pBlend = DllStructGetPtr($tBlend)
DllStructSetData($tBlend, "Alpha", 255)
DllStructSetData($tBlend, "Format", 1)
 
$gdibitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($_hBitmap)
_WinAPI_SelectObject($_hCompatibleDC, $gdibitmap)
_WinAPI_UpdateLayeredWindow($_hGUI_Dlg, $_hDC, 0, $pSize, $_hCompatibleDC, $pSource, 0, $pBlend, 2)
_WinAPI_DeleteObject($gdibitmap)
 
While 1
   If GUIGetMsg() = -3 Then _Quit()
WEnd
 
Func _Quit()
   _WinAPI_ReleaseDC($_hGUI_Dlg, $_hDC)
   _WinAPI_ReleaseDC($_hGUI_Dlg, $_hCompatibleDC)
   _WinAPI_DeleteDC($_hDC)
   _WinAPI_DeleteDC($_hCompatibleDC)
 
   _GDIPlus_GraphicsDispose($_hBuffer)
   _GDIPlus_BitmapDispose($_hBitmap)
   ; ---
   _GDIPlus_Shutdown()
   GuiDelete($_hGUI_Dlg)
 
   Exit
EndFunc

Br,
UEZ Edited July 29, 2013 by UEZ

[Artisan]

I was hoping to see UEZ post here.