QT Error with Twain Data Source

mrjj · B bhim 20 Dec 2017, 20:53

@bhim
seem to be kinda old/invalid .pro file
can you show what is inside?

bhim · 20 Dec 2017, 21:42

Below is the content of pro file

unix {
TEMPLATE = subdirs
VERSION = 1.0
DEFINES += UNIX
}

SUBDIRS = src

I have also shared entire project at below location for you.

https://drive.google.com/drive/folders/1gj69Kh7Xy8-p91uE3QUao673wqxoHidx?usp=sharing

mrjj · B bhim 20 Dec 2017, 21:08

@bhim
its wrong project file
there is
src.pro
in src

that seems better

bhim · 20 Dec 2017, 22:07

Thanks It much better now. Though i am still getting lot of errors but these are datatype error and seems like code specific.

Thanks a lot for your help.

Bhim

mrjj · B bhim 20 Dec 2017, 21:58

@bhim
Np.
I noticed there are some FreeImage lib files.
Not sure it uses it but make sure they are compatible with vs 2008 if it does.

Its pretty old project. there are no newer twain samples?

bhim · 20 Dec 2017, 22:15

This is the latest sample they have. With this i m getting below error , would you be able to help with this one as well?

I know how to take care of these in VS but not in QT.

mrjj · B bhim 20 Dec 2017, 22:10

@bhim
Well Qt is just a normal c++ LIB
and those are normal windows API calls so fix them like you normal would.
seems to be unicode related.
Didnt it later become common to put _TCHAR or something in front ?
or use wchar_t* and not char * ?
maybe you can just use the A version of the API and not W version

mrjj · wrote on 20 Dec 2017, 22:19

Hi
I wondered if
https://github.com/twain/twain-samples
is something else than the twain you try ?

bhim · 21 Dec 2017, 06:56

I tried the exact same exact same Twain.

mrjj · B bhim 20 Dec 2017, 23:41

@bhim
Ok but it didnt work or was not what you wanted?

bhim · wrote on 21 Dec 2017, 15:36

It did not work. However i am able to resolve most of the error for data type conversion. I am now stuck at below, i am not able to go to definition\declaration of this method to make any change. I know how to do it in Visual Studio but not in QT. Can you please help

bhim · 21 Dec 2017, 18:42

Hi,

I have resolved all string related error. Now my project is showing this :-1: error: LNK1104: cannot open file 'freeimage.lib' . If i could find the Visual Studio equivalent or Project property in QT, that would be very helpful to very file the linker paths.

mrjj · B bhim 21 Dec 2017, 17:01

@bhim
you mean to link the LIB file to the project ?
http://doc.qt.io/qt-5/third-party-libraries.html
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

Basically you need a
LIBS += -L"3rdparty/CatWhisperer/lib" -lCatWhisperer
(with correct names of course)

bhim · wrote on 21 Dec 2017, 19:37

Thanks , this resolve the lib issue. Now below 2 error

14:31:45: Running steps for project src...
14:31:45: Configuration unchanged, skipping qmake step.
14:31:45: Starting: "C:\Qt\qtcreator-4.5.0\bin\jom.exe"
c:\Qt\4.8.7\bin\qmake.exe -spec c:\Qt\4.8.7\mkspecs\win32-msvc2008 CONFIG+=release -o Makefile ..\src\src.pro
C:\Qt\qtcreator-4.5.0\bin\jom.exe -f Makefile.Debug
link /LIBPATH:"c:\Qt\4.8.7\lib" /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /DLL /MANIFEST /MANIFESTFILE:"debug\TWAINDS_FreeImage.intermediate.manifest" /OUT:debug\TWAINDS_FreeImage.dll @C:\Users\rathorb\AppData\Local\Temp\TWAINDS_FreeImage.dll.13524.62.jom
TWAIN_UI.obj : error LNK2019: unresolved external symbol __imp__SHGetSpecialFolderPathA@16 referenced in function "public: __thiscall CTWAIN_UI::CTWAIN_UI(class CTWAINDS_FreeImage *)" (??0CTWAIN_UI@@QAE@PAVCTWAINDS_FreeImage@@@Z)
debug\TWAINDS_FreeImage.dll : fatal error LNK1120: 1 unresolved externals
jom: C:\ODIImages\Source\Twain\twain-samples-master\twain-samples-master\TWAIN-Samples\Twain_DS_sample01\build-src-Unnamed-Release\Makefile.Debug [debug\TWAINDS_FreeImage.dll] Error 1120
jom: C:\ODIImages\Source\Twain\twain-samples-master\twain-samples-master\TWAIN-Samples\Twain_DS_sample01\build-src-Unnamed-Release\Makefile [debug] Error 2
14:31:51: The process "C:\Qt\qtcreator-4.5.0\bin\jom.exe" exited with code 2.
Error while building/deploying project src (kit: Unnamed)
The kit Unnamed has configuration issues which might be the root cause for this problem.
When executing step "Make"
14:31:51: Elapsed time: 00:06.

debug\TWAINDS_FreeImage.dll:-1: error: LNK1120: 1 unresolved externals

mrjj · wrote on 21 Dec 2017, 19:48

Hi
seems you need to link to
Shell32.lib also
https://msdn.microsoft.com/en-us/library/windows/desktop/bb762204(v=vs.85).aspx

bhim · 21 Dec 2017, 20:26

Thanks. I m able to build and run it now. But not able to find the output file, a .ds file anywhere? Can you please help me find where project is generating this file.

Below is pro file code

unix {
TEMPLATE = lib
VERSION = 1.0
DEFINES += UNIX
}
PROJECT_FILE_NAME = TWAINDS_FreeImage
TARGET = $$PROJECT_FILE_NAME
LIBS += -lfreeimage

TWAIN datasources end with a .ds instead of .so

QMAKE_POST_LINK = cp
$(TARGET)
$${PROJECT_FILE_NAME}.ds
ds.path = /usr/local/lib/twain/FreeImage
ds.files = $${PROJECT_FILE_NAME}.ds
TWAIN_logo.png
INSTALLS += ds
QMAKE_CLEAN = $${PROJECT_FILE_NAME}.ds
INCLUDEPATH = /usr/local/include
../../pub/external/include
../../pub/include
../../visual_studio/Debug32
../../common
LIBS += -L"../../pub/external/lib" -lFreeImage
SOURCES += ../../common/CTiffWriter.cpp
../../common/CommonTWAIN.cpp
CommonDS.cpp
CScanner_FreeImage.cpp
CTWAINDS_Base.cpp
CTWAINDS_FreeImage.cpp
DSMInterface.cpp
TWAINContainer.cpp
TWAINContainerFix32.cpp
TWAINContainerFrame.cpp
TWAINContainerInt.cpp
CTWAINDS_Sample1.cpp
TWAIN_UI.cpp
TWAINContainerString.cpp
TWAINContainerFix32Range.cpp
TWAINContainerBool.cpp
QT_UI.cpp
Qt_MainForm.cpp
Qt_About.cpp
Qt_ProfileName.cpp
HEADERS += ../../common/Common.h
../../common/CommonTWAIN.h
../../common/CTiffWriter.h
CScanner_FreeImage.h
CTWAINDS_Base.h
CTWAINDS_FreeImage.h
CommonDS.h
DSMInterface.h
TWAINContainerFix32.h
TWAINContainerFrame.h
TWAINContainer.h
TWAINContainerInt.h
CTWAINDS_Sample1.h
TWAIN_UI.h
TWAINContainerString.h
TWAINContainerFix32Range.h
TWAINContainerBool.h
QT_UI.h
Qt_MainForm.h
Qt_About.h
Qt_ProfileName.h
ui_About.h
ui_MainForm.h
ui_About.h
TEMPLATE = lib
CONFIG += warn_on
debug
x86 ppc

QMAKE_BUNDLE_EXTENSION = ds

this project doesn't need any QT libs.

QMAKE_LIBS_QT =
QMAKE_LIBS_QT_THREAD =
FORMS += MainForm.ui
About.ui
ProfileName.ui
RESOURCES += qtresources.qrc

unix|win32: LIBS += -lshell32

mrjj · B bhim 21 Dec 2017, 20:21

@bhim
Its not in build folder?

bhim · 21 Dec 2017, 20:27

Its there, but its in dll extension, its supposed to be .ds extension.

mrjj · B bhim 21 Dec 2017, 20:27

@bhim
What is a .ds file ?

bhim · 21 Dec 2017, 20:55

ds is Twain data source, OR Twain Driver. See below from my pro file, based on this it should have generated

TWAIN datasources end with a .ds instead of .so

QMAKE_POST_LINK = cp
$(TARGET)
$${PROJECT_FILE_NAME}.ds
ds.path = /usr/local/lib/twain/FreeImage
ds.files = $${PROJECT_FILE_NAME}.ds
TWAIN_logo.png
INSTALLS += ds
QMAKE_CLEAN = $${PROJECT_FILE_NAME}.ds