Search the Community

Struggling a bit to get this GDI+ function converted to AutoIt. #include <GDIPlus.au3> _GDIPlus_Startup() Global $hImage = _GDIPlus_ImageLoadFromFile("F:\DCIM\Camera\20170515_111804.jpg") Global $tBufferSize = DllStructCreate("uint") Global $tProperties = DllStructCreate("uint") _GDIPlus_GetPropertySize($hImage, $tBufferSize, $tProperties) Global $tAllItems = DllStructCreate("struct;char[" & DllStructGetData($tBufferSize, 1) & "];endstruct") _GDIPlus_GetAllPropertyItems($hImage, $tBufferSize, $tProperties, $tPropertyItem) _GDIPlus_ImageDispose($hImage) _GDIPlus_Shutdown() Func _GDIPlus_GetAllPropertyItems(ByRef $hImage, Const $tTotalBufferSize, Const $tNumProperties, ByRef $tAllItems) If (Not IsDllStruct($tPropertyItem)) Then Return SetError(-1, 0, "") Local $aResult = DllCall($__g_hGDIPDll, "int", "GdipGetAllPropertyItems", "hwnd", $hImage, "unit", DllStructGetData($tTotalBufferSize, 1), "uint", DllStructGetData($tNumProperties, 1), "ptr", DllStructGetPtr($tAllItems)) If (@error) Then Return SetError(@error, @extended, ConsoleWrite("@Error = " & @error & @LF)) If ($aResult[0]) Then Return SetError($aResult[0], @extended, "") Return $aResult[0] EndFunc ;==>_GDIPlus_GetAllPropertyItems Func _GDIPlus_GetPropertySize(Const ByRef $hImage, ByRef $tTotalBufferSize, ByRef $tNumProperties) If (Not IsDllStruct($tTotalBufferSize)) Then Return SetError(-1, 0, "") If (Not IsDllStruct($tNumProperties)) Then Return SetError(-2, 0, "") Local $aResult = DllCall($__g_hGDIPDll, "uint", "GdipGetPropertySize", "hwnd", $hImage, "uint_ptr", DllStructGetPtr($tTotalBufferSize), "uint_ptr", DllStructGetPtr($tNumProperties)) If (@error) Then Return SetError(@error, @extended, "") If ($aResult[0]) Then Return SetError($aResult[0], 0, "") Return $aResult[0] EndFunc ;==>_GDIPlus_GetPropertySize Got the GetPropertySize function to work, gives me the correct buffer size and the property count, but I cannot figure out how to get the struct for the all items. Function on MSDN: https://msdn.microsoft.com/en-us/library/windows/desktop/ms535372(v=vs.85).aspx Struct needed: PropertyItem class: https://msdn.microsoft.com/en-us/library/windows/desktop/ms534493(v=vs.85).aspx Found other topics about this function in other languages where they used a blank string as the buffer, so I tried using a char array, which doesn't work. Just cannot figure out how to create the struct buffer to hold the data.