How can I open openexr image on qt widget

[Nathan Miguel]

@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]

@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]

@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.

[Nathan Miguel]

@SGaist sorry for my keyboard and brazil, sometimes it fixes the errors alone, but what I wanted to say and if it would be easier to program this in linux and if you have how to compile windows files direct in linux. But continuing, where I can find this "FLTK_GL_LIBRARY", and about python it seems that cmake is using 2.7 and not the 3.7 to install the python boost.

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


ILMBASE_PACKAGE_PREFIX = C: / Program Files (x86) / OpenEXR
INFO, Skipping Python bindings
OPENEXR_PACKAGE_PREFIX =
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please make them or make sure they are set and tested correctly in the CMake files:
FLTK_GL_LIBRARY
     linked by target "exrdisplay" in directory C: / Git / openexr / OpenEXR_Viewers / exrdisplay

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

[Nathan Miguel]

@SGaist I've been able to compile all but that's missing so I can finish compiling Kimageformat, "https://api.kde.org/frameworks/karchive/html/index.html"

Could not set up the appstream test. appstreamcli is missing.
Could NOT find BZip2 (missing: BZIP2_LIBRARIES BZIP2_INCLUDE_DIR)
Could NOT find LibLZMA (missing: LIBLZMA_INCLUDE_DIR LIBLZMA_LIBRARY LIBLZMA_HAS_AUTO_DECODER LIBLZMA_HAS_EASY_ENCODER LIBLZMA_HAS_LZMA_PRESET)
The following OPTIONAL packages have been found:

* Qt5Network

• 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
 * ZLIB, Support for gzip compressed files and data streams, http://www.zlib.net
   Required by the core KDE libraries and some critical kioslaves
 * Qt5Core

• The following features have been disabled:

* QCH, API documentation in QCH format (for eg Qt Assistant, Qt Creator & KDevelop)

• The following OPTIONAL packages have not been found:

* LibLZMA, Support for xz compressed files and data streams, http://tukaani.org/xz/
   Support for xz compressed files and data streams

• The following RECOMMENDED packages have not been found:

* BZip2, Support for BZip2 compressed files and data streams, https://sourceware.org/bzip2/
   Support for BZip2 compressed files and data streams

Configuring done
Generating done

[Nathan Miguel]

@SGaist Sorry bother, but now I've been able to install everything, thanks to everyone, but how can I include this in my project

[VRonin]

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

but how can I include this in my project

http://doc.qt.io/qt-5/third-party-libraries.html
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

[Nathan Miguel]

@VRonin only have a problem, I just see these files for me and what does not accept other formats of includes other than .h, .lib, .a

[SGaist]

You don't have to link against them. They are plugins that will be loaded at run time.

You may have to add a call to QCoreApplication::addLibraryPath for your application to find them.

[Nathan Miguel]

@SGaist there is a problem so, cmake is not wanting to include the openexr library in kimageformat, and this makes my program compatible with psd, krikta and others except openexr

[Nathan Miguel]

@SGaist I was able to make cmake find them but I still have an error compiling openexr's ".lib"

CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `K_IStream::read(char*, int)':
C:/Git/kimageformats/src/imageformats/exr.cpp:61: undefined reference to `Iex_2_3::throwErrnoExc(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `EXRHandler::read(QImage*)':
C:/Git/kimageformats/src/imageformats/exr.cpp:169: undefined reference to `Imf_2_3::globalThreadCount()'
C:/Git/kimageformats/src/imageformats/exr.cpp:169: undefined reference to `Imf_2_3::RgbaInputFile::RgbaInputFile(Imf_2_3::IStream&, int)'
C:/Git/kimageformats/src/imageformats/exr.cpp:170: undefined reference to `Imf_2_3::RgbaInputFile::dataWindow() const'
C:/Git/kimageformats/src/imageformats/exr.cpp:178: undefined reference to `Imf_2_3::RgbaInputFile::setFrameBuffer(Imf_2_3::Rgba*, unsigned long long, unsigned long long)'
C:/Git/kimageformats/src/imageformats/exr.cpp:179: undefined reference to `Imf_2_3::RgbaInputFile::readPixels(int, int)'C:/Git/kimageformats/src/imageformats/exr.cpp:169: undefined reference to `Imf_2_3::RgbaInputFile::~RgbaInputFile()'
C:/Git/kimageformats/src/imageformats/exr.cpp:169: undefined reference to `Imf_2_3::RgbaInputFile::~RgbaInputFile()'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `EXRHandler::canRead(QIODevice*)':
C:/Git/kimageformats/src/imageformats/exr.cpp:212: undefined reference to `Imf_2_3::isImfMagic(char const*)'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `Iex_2_3::InputExc::InputExc(char const*)':
C:/PROGRA~1/OpenEXR/include/OpenEXR/IexBaseExc.h:156: undefined reference to `Iex_2_3::BaseExc::BaseExc(char const*)'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `Iex_2_3::InputExc::~InputExc()':
C:/PROGRA~1/OpenEXR/include/OpenEXR/IexBaseExc.h:156: undefined reference to `Iex_2_3::BaseExc::~BaseExc()'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `K_IStream::K_IStream(QIODevice*, QByteArray const&)':
C:/Git/kimageformats/src/imageformats/exr.cpp:40: undefined reference to `Imf_2_3::IStream::IStream(char const*)'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj):exr.cpp:(.rdata$_ZTV9K_IStream[_ZTV9K_IStream]+0x20): undefined reference to `Imf_2_3::IStream::isMemoryMapped() const'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj):exr.cpp:(.rdata$_ZTV9K_IStream[_ZTV9K_IStream]+0x30): undefined reference to `Imf_2_3::IStream::readMemoryMapped(int)'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj): In function `K_IStream::~K_IStream()':
C:/Git/kimageformats/src/imageformats/exr.cpp:36: undefined reference to `Imf_2_3::IStream::~IStream()'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj):exr.cpp:(.rdata$_ZTVN7Iex_2_38InputExcE[_ZTVN7Iex_2_38InputExcE]+0x20): undefined reference to `Iex_2_3::BaseExc::what() const'
CMakeFiles\kimg_exr.dir/objects.a(exr.cpp.obj):exr.cpp:(.rdata$.refptr._ZN4half8_toFloatE[.refptr._ZN4half8_toFloatE]+0x0): undefined reference to `half::_toFloat'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[2]: *** [src\imageformats\CMakeFiles\kimg_exr.dir\build.make:107: bin/imageformats/kimg_exr.dll] Error 1
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:200: src/imageformats/CMakeFiles/kimg_exr.dir/all] Error 2
mingw32-make.exe: *** [Makefile:140: all] Error 2

[SGaist]

Can you check in which OpenEXR library you have these symbols ? It's likely the llmlmf library but better double check.

[Nathan Miguel]

@SGaist strange, because all the libs here are good, until the includes are complete

[SGaist]

I didn't meant you are missing a library, just wondering which one contains the missing symbols and thus if you are linking against it.

[Nathan Miguel]

@SGaist The log says that "moc_predefs.h" is giving the library error to generate kimg_exr.dll, more briefly, but what can I do to correct it, I tried to switch between VS and mingw

[ 1%] Automatic MOC for target kimg_exr

AutoMoc subprocess error

The content generation command for "moc_predefs.h" failed.

Command

C:/Qt/Tools/mingw730_64/bin/g++.exe -dM -E -c "C:/Program Files/CMake/share/cmake-3.13/Modules/CMakeCXXCompilerABI.cpp" -IC:/Git/kimageformats/build/src/imageformats -IC:/Git/kimageformats/src/imageformats -IC:/Qt/5.12.0/mingw73_64/include -IC:/Qt/5.12.0/mingw73_64/include/QtGui -IC:/Qt/5.12.0/mingw73_64/include/QtANGLE -IC:/Qt/5.12.0/mingw73_64/include/QtCore -IC:/Qt/5.12.0/mingw73_64/./mkspecs/win32-g++ "-IC:/Program Files/OpenEXR/include/OpenEXR" -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_FROM_BYTEARRAY -DQT_NO_CAST_TO_ASCII -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_SIGNALS_SLOTS_KEYWORDS -DQT_NO_URL_CAST_FROM_STRING -DQT_USE_QSTRINGBUILDER -DUNICODE -DWIN32_LEAN_AND_MEAN -DWINVER=0x0600 -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D_USE_MATH_DEFINES -D_WIN32_IE=0x0600 -D_WIN32_WINNT=0x0600 -DWIN32

Output

src\imageformats\CMakeFiles\kimg_exr_autogen.dir\build.make:56: recipe for target 'src/imageformats/CMakeFiles/kimg_exr_autogen' failed
mingw32-make.exe[2]: *** [src/imageformats/CMakeFiles/kimg_exr_autogen] Error 1
CMakeFiles\Makefile2:569: recipe for target 'src/imageformats/CMakeFiles/kimg_exr_autogen.dir/all' failed
mingw32-make.exe[1]: *** [src/imageformats/CMakeFiles/kimg_exr_autogen.dir/all] Error 2
Makefile:139: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2

[SGaist]

You can't mix and match C++ libraries built with VS and MinGW, you have to always use the same compiler.

[VRonin]

I tried to build it myself but I must admit I too struggle with getting openexr to link. I will post my progress below anyway to make it more accessible to other people to try and fix this. The commands should create a zip file containing each dependency and a zip file containing the KDE API libraries but I can't get the final link over the line

The series of commands I used can be replicated to build all the dependencies and the library (as you can see, I built with Qt5.12 on MSVC 2015):

set cmake_path=C:\Program Files\CMake\bin
set 7zip_path=C:\Program Files\7-Zip
set git_path=C:\Program Files\Git\bin
set qt_path=C:\Qt\5.12\msvc2015_64
set curl_path=C:\libcurl\bin
set compiler_path=C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
set comp_platform=amd64
set use_mingw=false
set originalWD=%CD%
set PATH=%cmake_path%;%git_path%;%curl_path%;%7zip_path%;%PATH%
call "%qt_path%\bin\qtenv2.bat"
cd %originalWD%
echo on
if %use_mingw%==true set PATH=%compiler_path%;%PATH%
if %use_mingw%==false call "%compiler_path%\vcvarsall.bat" %comp_platform%
if %use_mingw%==true (set CMAKEGENERATOR="MinGW Makefiles") else (set CMAKEGENERATOR="NMake Makefiles")
mkdir .\bzip2src && cd .\bzip2src
curl -k -L https://sourceforge.net/projects/gnuwin32/files/bzip2/1.0.5/bzip2-1.0.5-src.zip --output bzip2.zip
7z x bzip2.zip
del /F /Q  bzip2.zip
cd src\bzip2\1.0.5\bzip2-1.0.5\
mkdir build && cd build
echo cmake_minimum_required(VERSION 3.5) >> ..\CMakeLists.txt
echo project(bzip2 C) >> ..\CMakeLists.txt
echo set(bzip2_VERSION 1.0.5) >> ..\CMakeLists.txt
echo set(bzip2_SRCS >> ..\CMakeLists.txt
echo bzlib.c >> ..\CMakeLists.txt
echo blocksort.c >> ..\CMakeLists.txt
echo huffman.c >> ..\CMakeLists.txt
echo crctable.c >> ..\CMakeLists.txt
echo compress.c >> ..\CMakeLists.txt
echo decompress.c >> ..\CMakeLists.txt
echo randtable.c >> ..\CMakeLists.txt
echo ) >> ..\CMakeLists.txt
echo add_library(bzip2 SHARED ${bzip2_SRCS}) >> ..\CMakeLists.txt
echo install(TARGETS bzip2 >> ..\CMakeLists.txt
echo EXPORT bzip2 >> ..\CMakeLists.txt
echo RUNTIME DESTINATION bin COMPONENT library >> ..\CMakeLists.txt
echo LIBRARY DESTINATION lib COMPONENT library >> ..\CMakeLists.txt
echo ARCHIVE DESTINATION lib COMPONENT library >> ..\CMakeLists.txt
echo ) >> ..\CMakeLists.txt
echo install(FILES bzlib.h >> ..\CMakeLists.txt
echo DESTINATION include >> ..\CMakeLists.txt
echo COMPONENT headers >> ..\CMakeLists.txt
echo ) >> ..\CMakeLists.txt
cmake -G %CMAKEGENERATOR% -DCMAKE_INSTALL_PREFIX=../../../../../../bzip2 -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\..\..\..\..\
set PATH=%CD%\bzip2;%PATH%
7z a -tzip bzip2.zip .\bzip2\*
mkdir .\liblzma && cd .\liblzma
curl -k -L https://tukaani.org/xz/xz-5.2.4-windows.zip --output liblzma.zip
7z x liblzma.zip
del /F /Q liblzma.zip
if %use_mingw%==true (ren bin_i686 lib) else (mkdir lib && mkdir bin)
if %use_mingw%==false curl -k -L https://tukaani.org/xz/xz-5.2.4.tar.gz --output liblzma.tar.gz
if %use_mingw%==false 7z x liblzma.tar.gz
if %use_mingw%==false del /F /Q liblzma.tar.gz
if %use_mingw%==false 7z x liblzma.tar
if %use_mingw%==false del /F /Q liblzma.tar
if %use_mingw%==false cd xz-5.2.4\windows\vs2013
if %comp_platform%==x86 if %use_mingw%==false msbuild xz_win.sln /property:Configuration=Release /property:Platform=Win32 && xcopy /Y /I /K Release\Win32\liblzma_dll\*.dll ..\..\..\bin && xcopy /Y /I /K Release\Win32\liblzma_dll\*.lib ..\..\..\lib
if %comp_platform%==amd64 if %use_mingw%==false msbuild xz_win.sln /property:Configuration=Release /property:Platform=x64 && xcopy /Y /I /K Release\x64\liblzma_dll\*.dll ..\..\..\bin && xcopy /Y /I /K Release\x64\liblzma_dll\*.lib ..\..\..\lib
if %use_mingw%==false cd ..\..\..\
set PATH=%CD%;%PATH%
cd ..\
7z a -tzip liblzma.zip .\liblzma\include\
7z a -tzip liblzma.zip .\liblzma\lib\
if %use_mingw%==false 7z a -tzip liblzma.zip .\liblzma\bin\
git clone https://github.com/madler/zlib.git zlibBuild
cd zlibBuild
mkdir .\build && cd .\build
cmake -G %CMAKEGENERATOR% -DCMAKE_INSTALL_PREFIX=../../zlib -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\
7z a -tzip zlib.zip .\zlib\*
set PATH=%CD%\zlib;%PATH%
git clone https://github.com/openexr/openexr.git OpenEXRsrc
cd OpenEXRsrc
mkdir .\build && cd .\build
cmake -G %CMAKEGENERATOR% -DOPENEXR_NAMESPACE_VERSIONING=OFF -DOPENEXR_BUILD_PYTHON_LIBS=OFF -DCMAKE_DEBUG_POSTFIX=d -DOPENEXR_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=../../OpenEXR -DCMAKE_BUILD_TYPE=DEBUG ../
cmake --build .
cmake --build . --target install
cmake -G %CMAKEGENERATOR% -DOPENEXR_NAMESPACE_VERSIONING=OFF -DOPENEXR_BUILD_PYTHON_LIBS=OFF -DOPENEXR_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=../../OpenEXR -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\
7z a -tzip OpenEXR.zip .\OpenEXR\*
set PATH=%CD%\OpenEXR;%PATH%
git clone git://anongit.kde.org/extra-cmake-modules ECM
cd ECM
mkdir .\build && cd .\build
cmake -G %CMAKEGENERATOR% -DBUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX=../../ECMbuild -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\
set PATH=%CD%\ECMbuild;%PATH%
git clone git://anongit.kde.org/karchive.git KArchive
cd KArchive
mkdir .\build && cd .\build
cmake -G %CMAKEGENERATOR% -DBUILD_TESTING=OFF -DCMAKE_DEBUG_POSTFIX=d -DCMAKE_INSTALL_PREFIX=../../KDEAPI -DCMAKE_BUILD_TYPE=DEBUG ../
cmake --build .
cmake --build . --target install
cmake -G %CMAKEGENERATOR% -DBUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX=../../KDEAPI -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\
set PATH=%CD%\KDEAPI;%PATH%
git clone git://anongit.kde.org/kimageformats.git KImageFormats
cd KImageFormats
mkdir .\build && cd .\build
cmake -G %CMAKEGENERATOR% -DBUILD_TESTING=OFF -DCMAKE_DEBUG_POSTFIX=d -DCMAKE_INSTALL_PREFIX=../../KDEAPI -DCMAKE_BUILD_TYPE=DEBUG ../
cmake --build .
cmake --build . --target install
cmake -G %CMAKEGENERATOR% -DBUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX=../../KDEAPI -DCMAKE_BUILD_TYPE=RELEASE ../
cmake --build .
cmake --build . --target install
cd ..\..\
7z a -tzip KDElib.zip .\KDEAPI\*

You'll need to have installed 7-zip, curl, CMake and git.
You'll need to change the initial lines to match your system:

• set cmake_path=C:\Program Files\CMake\bin: path to the CMake executable
• set 7zip_path=C:\Program Files\7-Zip: path to the 7-zip executable
• set git_path=C:\Program Files\Git\bin: path to the git executable
• set qt_path=C:\Qt\5.12\msvc2015_64: path to your qt directory
• set curl_path=C:\libcurl\bin: path to the curl executable
• set compiler_path=C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC: path to the compiler binary folder
• set comp_platform=amd64 can be either amd64 or x86 determines if the build is 64 or 32 bit
• set use_mingw=false set to true if you use MinGW or false if you use MSVC

One final thing, if you use MinGW you might need to adjust the line if %use_mingw%==true (ren bin_i686 lib) else (mkdir lib && mkdir bin) changing bin_i686 to the name of the folder containing the libraries that match your compiler (there are 3 available)

[Nathan Miguel]

@SGaist @VRonin you save my lifeeeeeee. but Well I chose to use VS because mingw gave object error, but how can I include it in qt now, you can give a clearer explanation because documentation is confusing

[VRonin]

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

but how can I include it in qt

I imagine you mean Qt Creator. Right click on your project -> add library -> external library -> select the .lib file and the include directory (the d suffix should be detected automatically).

[Nathan Miguel]

@VRonin even the libs was fine, but in question my qt still does not open and I still have some doubts,

1. Do I need to add the openexr and libs includes?
2. Can I continue using the QPixelmap label?
3. In kimageformat did not come any include in .h, do I have to use .desktop or use the openexr includes to open the image?

This is the function I'm using to open an image

void MainWindow::on_actionOpen_Image_triggered()
{
    QString filter = "Imagens (*.bmp *.cur *.gif *icns *.ico *.jpg *.jpeg *.pdm *.pgm *.png *.ppm *.svg *.tga *.tif *.tiff *.wbmp *.webp *.xmb *.xpm) ;; All Files (*.*)";
    QString filename = QFileDialog::getOpenFileName(this, "Open", QDir::homePath(), filter);
    QFile file(filename);
    QImage image(filename);
    if (!image.isNull())
        {
             QImage image(filename);
             image = image.scaledToWidth(ui->labelimg->width(), Qt::SmoothTransformation);
             image = image.scaledToWidth(ui->labelimg->height(), Qt::SmoothTransformation);
             ui->labelimg->setPixmap(QPixmap::fromImage(image));
        }
    else
        {
            QMessageBox::warning(this, "Error", "Image can not open");
            filename = "";
        }

}