How can I open openexr image on qt widget

Nathan Miguel · wrote on 9 Dec 2018, 15:11

I wanted to know how I can open images in openexr format in qt, I got to do this with png, gif and etc, which are compatible with pixelmap

mrjj · 10 Dec 2018, 12:30

Hi
https://api.kde.org/frameworks/kimageformats/html/index.html
Supports OpenEXR but as far as i know Qt does not naively support it.

Nathan Miguel · 10 Dec 2018, 12:36

@mrjj Thanks for the help, but you have some idea how to install this or use pq my cmake is giving error and decompression in the dependency list here

mrjj · 10 Dec 2018, 12:44

@Nathan-Miguel
Hi
https://community.kde.org/Guidelines_and_HOWTOs/Build_from_source/Details#kimageformats

If you list the excact errors, im hopefull that someone can guess what is missing.

You might need to install openEXR first so plugin can find it.

Nathan Miguel · M mrjj 10 Dec 2018, 12:36

@mrjj I used msvs 15, 17 win 64

The C compiler identification is MSVC 19.16.27024.1
The CXX compiler identification is MSVC 19.16.27024.1
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Detecting C compile features
Detecting C compile features - done
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
Could NOT find ECM (missing: ECM_DIR)

ECM (required version >= 5.53.0), Extra CMake Modules., https://projects.kde.org/projects/kdesupport/extra-cmake-modules

CMake Error at C:/Program Files/CMake/share/cmake-3.13/Modules/FeatureSummary.cmake:459 (message):
feature_summary() Error: REQUIRED package(s) are missing, aborting CMake
run.
Call Stack (most recent call first):
CMakeLists.txt:8 (feature_summary)

Configuring incomplete, errors occurred!
See also "C:/Git/kimageformats/build/CMakeFiles/CMakeOutput.log".

mrjj · 12 Oct 2018, 12:55

@Nathan-Miguel said in How can I open openexr image on qt widget:

Extra CMake Modules., https://projects.kde.org/projects/kdesupport/extra-cmake-modules

It seems to want these also. But im not sure.
something like

git clone git://anongit.kde.org/extra-cmake-modules
cd extra-cmake-modules
mkdir build && cd build    
cmake ..
make && sudo make install

but hold the horse a moment. Im only guessing so give it
a few hours in case someone knows exactly if thats correct.

Update:
yep, should do it.

VRonin · 10 Dec 2018, 13:33

KDE requires their extra CMake modules. You can install them as any other KDE module

For a guide on how to compile and use the libraries see https://forum.qt.io/post/377923

Nathan Miguel · M mrjj 10 Dec 2018, 12:49

@mrjj Sorry for the delay, but has some way to do this "make" on windows, because this seems to be compilavel so for linux

Nathan Miguel · 10 Dec 2018, 13:36

@VRonin @mrjj It worked out right here but now I'm with error in the qt files

The C compiler identification is MSVC 19.16.27024.1
The CXX compiler identification is MSVC 19.16.27024.1
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Detecting C compile features
Detecting C compile features - done
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done

No qmake Qt5 binary found. Can't check QT_INSTALL_PREFIX
Looking for GLIBC
Looking for GLIBC - not found
Could not set up the appstream test. appstreamcli is missing.
CMake Error at CMakeLists.txt:21 (find_package):
Could not find a package configuration file provided by "Qt5Gui" (requested
version 5.9.0) with any of the following names:

Qt5GuiConfig.cmake
qt5gui-config.cmake

Add the installation prefix of "Qt5Gui" to CMAKE_PREFIX_PATH or set
"Qt5Gui_DIR" to a directory containing one of the above files. If "Qt5Gui"
provides a separate development package or SDK, be sure it has been
installed.

Configuring incomplete, errors occurred!
See also "C:/Git/kimageformats/build/CMakeFiles/CMakeOutput.log".
See also "C:/Git/kimageformats/build/CMakeFiles/CMakeError.log".

jsulm · 10 Dec 2018, 14:21

@Nathan-Miguel I guess you need to use MinGW

Nathan Miguel · J jsulm 10 Dec 2018, 13:36

@jsulm I used mingw but it gave an eros too.

The C compiler identification is unknown
The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:3 (project):
The CMAKE_C_COMPILER:

cl

is not a full path and was not found in the PATH.

To use the NMake generator with Visual C++, cmake must be run from a shell
that can use the compiler cl from the command line. This environment is
unable to invoke the cl compiler. To fix this problem, run cmake from the
Visual Studio Command Prompt (vcvarsall.bat).

Tell CMake where to find the compiler by setting either the environment
variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
the compiler, or to the compiler name if it is in the PATH.

CMake Error at CMakeLists.txt:3 (project):
The CMAKE_CXX_COMPILER:

cl

is not a full path and was not found in the PATH.

To use the NMake generator with Visual C++, cmake must be run from a shell
that can use the compiler cl from the command line. This environment is
unable to invoke the cl compiler. To fix this problem, run cmake from the
Visual Studio Command Prompt (vcvarsall.bat).

Tell CMake where to find the compiler by setting either the environment
variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.

Configuring incomplete, errors occurred!
See also "C:/Git/kimageformats/build/CMakeFiles/CMakeOutput.log".
See also "C:/Git/kimageformats/build/CMakeFiles/CMakeError.log".

Nathan Miguel · J jsulm 10 Dec 2018, 13:36

@jsulm @mrjj @VRonin is almost, I just need to find this folder that is highlighted and know how to include openexr libraries

Could not set up the appstream test. appstreamcli is missing.
CMake Warning at CMakeLists.txt:23 (find_package):
By not providing "FindKF5Archive.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"KF5Archive", but CMake did not find one.

Could not find a package configuration file provided by "KF5Archive" with
any of the following names:

KF5ArchiveConfig.cmake
kf5archive-config.cmake

Add the installation prefix of "KF5Archive" to CMAKE_PREFIX_PATH or set
"KF5Archive_DIR" to a directory containing one of the above files. If
"KF5Archive" provides a separate development package or SDK, be sure it has
been installed.

Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
Could NOT find OpenEXR (missing: OpenEXR_ILMIMF_LIBRARY OpenEXR_HALF_LIBRARY OpenEXR_IEX_LIBRARY OpenEXR_IMATH_LIBRARY OpenEXR_ILMTHREAD_LIBRARY OpenEXR_INCLUDE_DIR)
The following REQUIRED packages have been found:

ECM (required version >= 5.53.0), Extra CMake Modules., https://projects.kde.org/projects/kdesupport/extra-cmake-modules
Qt5Gui (required version >= 5.9.0)

-- The following OPTIONAL packages have not been found:

KF5Archive
Required for the QImage plugin for Krita and OpenRaster images
PkgConfig
OpenEXR, A library for handling OpenEXR high dynamic-range image files, http://www.openexr.com/
Required for the QImage plugin for OpenEXR images

Configuring done
Generating done

SGaist · 11 Dec 2018, 17:20

Did you get OpenEXR first ?

VRonin · wrote on 11 Dec 2018, 08:19

It worked out right here but now I'm with error in the qt files
No qmake Qt5 binary found. Can't check QT_INSTALL_PREFIX

You need to run qtenv2.bat as explained in the link I posted

but has some way to do this "make" on windows

Once you selected the right generator just call cmake --build . (don't forget the dot at the end) and CMake will automatically call the correct build tool

Could not find a package configuration file provided by "KF5Archive" with

weird, KArchive is not listed as a dependency for KImageFormats. In any case it's a Tier1 Module of KDE

The following OPTIONAL packages have not been found:

KF5Archive

so it's just optional, cool.

P.S.
In my experience CMake GUI messed up my config more than it helped me build projects, I find it easier just doing it via the terminal

Nathan Miguel · S SGaist 10 Dec 2018, 21:27

@SGaist Well I'm finishing compiling the remaining dependencies, but the only thing that gave me error was to install the fade pro python library "https://stefanseefeld.github.io/faber" I performed all the right steps but the system can not find directory or error on line 139

SGaist · 11 Dec 2018, 20:50

Can you give more details about what you did and what failed ?

Nathan Miguel · S SGaist 11 Dec 2018, 20:21

@SGaist

CMAKE TERMINAL:

PS C:\Git\openexr\build> cmake --build .
[  0%] Built target eLut
[  1%] Built target toFloat
[  1%] Built target Half
[  2%] Built target Half_static
[  2%] Built target Iex
[  3%] Built target Iex_static
[  4%] Building CXX object IlmBase/IexMath/CMakeFiles/IexMath.dir/IexMathFloatExc.cpp.obj
In file included from C:/Git/openexr/IlmBase/Iex/IexMathExc.h:40:0,
                 from C:/Git/openexr/IlmBase/IexMath/IexMathFloatExc.h:58,
                 from C:\Git\openexr\IlmBase\IexMath\IexMathFloatExc.cpp:43:
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:149:29: error: function 'Iex_2_3::ArgExc::ArgExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc)    // Invalid arguments to a function call
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:149:29: error: function 'Iex_2_3::ArgExc::ArgExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc)    // Invalid arguments to a function call
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:149:29: error: function 'Iex_2_3::ArgExc::ArgExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc)    // Invalid arguments to a function call
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:149:29: error: function 'Iex_2_3::ArgExc::ArgExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc)    // Invalid arguments to a function call
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::ArgExc::~ArgExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:149:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc)    // Invalid arguments to a function call
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:151:29: error: function 'Iex_2_3::LogicExc::LogicExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc)  // General error in a program's logic,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:151:29: error: function 'Iex_2_3::LogicExc::LogicExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc)  // General error in a program's logic,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:151:29: error: function 'Iex_2_3::LogicExc::LogicExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc)  // General error in a program's logic,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:151:29: error: function 'Iex_2_3::LogicExc::LogicExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc)  // General error in a program's logic,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::LogicExc::~LogicExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:151:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc)  // General error in a program's logic,
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:156:29: error: function 'Iex_2_3::InputExc::InputExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc)  // Invalid input data, e.g. from a file
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:156:29: error: function 'Iex_2_3::InputExc::InputExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc)  // Invalid input data, e.g. from a file
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:156:29: error: function 'Iex_2_3::InputExc::InputExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc)  // Invalid input data, e.g. from a file
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:156:29: error: function 'Iex_2_3::InputExc::InputExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc)  // Invalid input data, e.g. from a file
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::InputExc::~InputExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:156:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc)  // Invalid input data, e.g. from a file
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:158:29: error: function 'Iex_2_3::IoExc::IoExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc)     // Input or output operation failed
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:158:29: error: function 'Iex_2_3::IoExc::IoExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc)     // Input or output operation failed
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:158:29: error: function 'Iex_2_3::IoExc::IoExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc)     // Input or output operation failed
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:158:29: error: function 'Iex_2_3::IoExc::IoExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc)     // Input or output operation failed
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::IoExc::~IoExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:158:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc)     // Input or output operation failed
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:160:29: error: function 'Iex_2_3::MathExc::MathExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc)  // Arithmetic exception; more specific
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:160:29: error: function 'Iex_2_3::MathExc::MathExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc)  // Arithmetic exception; more specific
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:160:29: error: function 'Iex_2_3::MathExc::MathExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc)  // Arithmetic exception; more specific
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:160:29: error: function 'Iex_2_3::MathExc::MathExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc)  // Arithmetic exception; more specific
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::MathExc::~MathExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:160:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc)  // Arithmetic exception; more specific
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:164:29: error: function 'Iex_2_3::ErrnoExc::ErrnoExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc)  // Base class for exceptions corresponding
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:164:29: error: function 'Iex_2_3::ErrnoExc::ErrnoExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc)  // Base class for exceptions corresponding
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:164:29: error: function 'Iex_2_3::ErrnoExc::ErrnoExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc)  // Base class for exceptions corresponding
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:164:29: error: function 'Iex_2_3::ErrnoExc::ErrnoExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc)  // Base class for exceptions corresponding
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::ErrnoExc::~ErrnoExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:164:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc)  // Base class for exceptions corresponding
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:169:29: error: function 'Iex_2_3::NoImplExc::NoImplExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:169:29: error: function 'Iex_2_3::NoImplExc::NoImplExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:169:29: error: function 'Iex_2_3::NoImplExc::NoImplExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:169:29: error: function 'Iex_2_3::NoImplExc::NoImplExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::NoImplExc::~NoImplExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:169:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:175:29: error: function 'Iex_2_3::NullExc::NullExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc)   // A pointer is inappropriately null.
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:175:29: error: function 'Iex_2_3::NullExc::NullExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc)   // A pointer is inappropriately null.
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:175:29: error: function 'Iex_2_3::NullExc::NullExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc)   // A pointer is inappropriately null.
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:175:29: error: function 'Iex_2_3::NullExc::NullExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc)   // A pointer is inappropriately null.
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::NullExc::~NullExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:175:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc)   // A pointer is inappropriately null.
 ^~~~~~~~~~~~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:177:29: error: function 'Iex_2_3::TypeExc::TypeExc()' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc)   // An object is an inappropriate type,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:135:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name()                         throw(): base (0)    {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:177:29: error: function 'Iex_2_3::TypeExc::TypeExc(const char*)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc)   // An object is an inappropriate type,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:136:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const char* text)        throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:177:29: error: function 'Iex_2_3::TypeExc::TypeExc(const string&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc)   // An object is an inappropriate type,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:137:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (const std::string &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:177:29: error: function 'Iex_2_3::TypeExc::TypeExc(std::stringstream&)' definition is marked dllimport
 DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc)   // An object is an inappropriate type,
                             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:138:13: note: in definition of macro 'DEFINE_EXC_EXP'
         exp name (std::stringstream &text) throw(): base (text) {}  \
             ^~~~
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:139:13: error: function 'Iex_2_3::TypeExc::~TypeExc()' definition is marked dllimport
         exp ~name() throw() { }                                     \
             ^
C:/Git/openexr/IlmBase/Iex/IexBaseExc.h:177:1: note: in expansion of macro 'DEFINE_EXC_EXP'
 DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc)   // An object is an inappropriate type,
 ^~~~~~~~~~~~~~
IlmBase\IexMath\CMakeFiles\IexMath.dir\build.make:62: recipe for target 'IlmBase/IexMath/CMakeFiles/IexMath.dir/IexMathFloatExc.cpp.obj' failed
mingw32-make.exe[2]: *** [IlmBase/IexMath/CMakeFiles/IexMath.dir/IexMathFloatExc.cpp.obj] Error 1
CMakeFiles\Makefile2:1294: recipe for target 'IlmBase/IexMath/CMakeFiles/IexMath.dir/all' failed
mingw32-make.exe[1]: *** [IlmBase/IexMath/CMakeFiles/IexMath.dir/all] Error 2
Makefile:161: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2

CMAKE GUI 

CMake Warning at CMakeLists.txt:143 (message):
  Viewers are currently out of order.  Building anyway


Found OpenGL: opengl32   
Could NOT find FLTK (missing: FLTK_LIBRARIES FLTK_INCLUDE_DIR) 
CMake Warning at CMakeLists.txt:147 (message):
  FLTK not found, exrdisplay will not be built


ILMBASE_PACKAGE_PREFIX = C:/Program Files (x86)/OpenEXR
INFO,Skipping Python bindings
INFO,Skipping OpenEXR Viewers
Configuring done
Generating done

Nathan Miguel · S SGaist 11 Dec 2018, 20:21

@SGaist I also try to compile without selecting these options python lib and openexr viewer as well as in the image. python was because I could not install the "Faber" and the viewer was because I could not install the fltk tbm

Nathan Miguel · 12 Nov 2018, 21:03

@SGaist If you have a problem with linux on linux, I would like to install linux on linux, because it is horrible to program on windows in C ++ on my opinion

SGaist · 11 Dec 2018, 22:22

@Nathan-Miguel said in How can I open openexr image on qt widget:

@SGaist If you have a problem with linux on linux, I would like to install linux on linux, because it is horrible to program on windows in C ++ on my opinion

Install Linux on Linux ? What do you mean by that ?

In any case, you don't really need the viewer since you want to use Qt to show the images.