How can I open openexr image on qt widget

[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 = "";
        }

}

[SGaist]

Where did you install the plugins ?
You can also set the QT_DEBUG_PLUGINS environment variable to 1 in the Run part of the Project panel to see what is happening.

[Nathan Miguel]

@SGaist The .desktop files are in the files and programs folder, the libs continued in the folder on I compiled, which was in C: / Git / kimageformat / build, and the dll were for the qt compiler itself, msvc2017-64 in the plugin / image folder

One more thing, in this directory "C: \ Qt \ 5.12.0 \ msvc2017_64 \ plugins \ imageformats", I realized that the "tga" format, had tbm support here, and gives the same error when I try to open open exr in the app debug "QImage :: scaleWidth: Image is a null image".

First I used the .dll, .pdb files with this name "kimg_exr", then renamed "qexr", both the dll and the pdb, but it still did not work, nor with the native tga that worked right.

And if it is useful these are my includes

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDesktopServices>
#include <QMessageBox>
#include <QUrl>
#include <QFile>
#include <QFileDialog>
#include <QImage>
#include <QPixmap>
#include <QImageIOPlugin>
#include <QImageIOHandler>

source code: https://github.com/nathanmiguel123/Denoiser-Script

[SGaist]

Did you call nmake install at some point ?

[Nathan Miguel]

@SGaist noup

[SGaist]

Then this might explain the missing plugins.