How can I open openexr image on qt widget

Nathan Miguel

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

Do I need to add the openexr and libs includes?
Can I continue using the QPixelmap label?
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.

Nathan Miguel

@SGaist So I'm practically going to have to build manually?

SGaist

Build what manually ?

The fact that you didn't call nmake install after building the module just means that you didn't install the libraries/plugins you built so that might be a reason why Qt can't find them. You should first try that.

Nathan Miguel

@SGaist well I did it, but still I keep giving it not opening

16:59:10: Running steps for project src...
16:59:10: Starting: "C:\Qt\Tools\QtCreator\bin\jom.exe" clean
	C:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Debug clean
	del debug\moc_predefs.h
	del debug\moc_mainwindow.cpp
	del ui_mainwindow.h
	del debug\main.obj debug\mainwindow.obj debug\moc_mainwindow.obj
	del debug\src.exp debug\src.vc.pdb debug\src.ilk debug\src.idb
	C:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Release clean
	del release\moc_predefs.h
	del release\moc_mainwindow.cpp
	del ui_mainwindow.h
	del release\main.obj release\mainwindow.obj release\moc_mainwindow.obj
	del release\src.exp
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\release\moc_predefs.h
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\release\moc_mainwindow.cpp
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\ui_mainwindow.h
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\release\main.obj
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\release\src.exp
	del src.exp
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\src.exp
	del src.vc.pdb
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\src.vc.pdb
	del src.ilk
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\src.ilk
	del src.idb
NÆo foi poss¡vel encontrar C:\Git\Denoiser-Script\build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\src.idb
16:59:11: The process "C:\Qt\Tools\QtCreator\bin\jom.exe" exited normally.
16:59:11: Starting: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64\nmake.exe" 

Microsoft (R) Program Maintenance Utility Versão 14.16.27025.1
Direitos autorais da Microsoft Corporation. Todos os direitos reservados.
	"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64\nmake.exe" -f Makefile.Debug

Microsoft (R) Program Maintenance Utility Versão 14.16.27025.1
Direitos autorais da Microsoft Corporation. Todos os direitos reservados.
	C:\Qt\5.12.0\msvc2017_64\bin\uic.exe ..\src\mainwindow.ui -o ui_mainwindow.h
	cl -BxC:\Qt\5.12.0\msvc2017_64\bin\qmake.exe -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zc:referenceBinding -Zc:__cplusplus -Zi -MDd -std:c++17 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 -E ..\..\..\Qt\5.12.0\msvc2017_64\mkspecs\features\data\dummy.cpp 2>NUL >debug\moc_predefs.h
	C:\Qt\5.12.0\msvc2017_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB --compiler-flavor=msvc --include C:/Git/Denoiser-Script/build-src-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug/debug/moc_predefs.h -IC:/Qt/5.12.0/msvc2017_64/mkspecs/win32-msvc -IC:/Git/Denoiser-Script/src -IC:/Qt/5.12.0/msvc2017_64/include -IC:/Qt/5.12.0/msvc2017_64/include/QtWidgets -IC:/Qt/5.12.0/msvc2017_64/include/QtGui -IC:/Qt/5.12.0/msvc2017_64/include/QtANGLE -IC:/Qt/5.12.0/msvc2017_64/include/QtCore -I. -I"C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.16.27023\include" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\cppwinrt" ..\src\mainwindow.h -o debug\moc_mainwindow.cpp
	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zc:referenceBinding -Zc:__cplusplus -Zi -MDd -std:c++17 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 -EHsc /Fddebug\src.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I..\src -I. -I..\..\..\Qt\5.12.0\msvc2017_64\include -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtWidgets -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtGui -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtANGLE -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtCore -Idebug -I. -I\include -I..\..\..\Qt\5.12.0\msvc2017_64\mkspecs\win32-msvc -Fodebug\ @C:\Users\natha\AppData\Local\Temp\nm127F.tmp
main.cpp
mainwindow.cpp
Gerando C¢digo...
	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zc:referenceBinding -Zc:__cplusplus -Zi -MDd -std:c++17 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 -EHsc /Fddebug\src.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I..\src -I. -I..\..\..\Qt\5.12.0\msvc2017_64\include -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtWidgets -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtGui -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtANGLE -I..\..\..\Qt\5.12.0\msvc2017_64\include\QtCore -Idebug -I. -I\include -I..\..\..\Qt\5.12.0\msvc2017_64\mkspecs\win32-msvc -Fodebug\ @C:\Users\natha\AppData\Local\Temp\nm1EE4.tmp
moc_mainwindow.cpp
	link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:debug\src.exe @C:\Users\natha\AppData\Local\Temp\nm23F6.tmp
16:59:17: The process "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64\nmake.exe" exited normally.
16:59:17: Configuration unchanged, skipping qmake step.
16:59:17: Starting: "C:\Qt\Tools\QtCreator\bin\jom.exe" 
	C:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Debug
16:59:17: The process "C:\Qt\Tools\QtCreator\bin\jom.exe" exited normally.
16:59:17: Elapsed time: 00:07.

SGaist

Did you run your application with the QT_DEBUG_PLUGINS environment variable set to 1 to see what exactly is happening with the plugins ?

Nathan Miguel

@SGaist I already tried td and q_debug_plugin does not appear, I do not know how to implement it

SGaist

Might be a silly remark but the casing is important as well as the name. It's QT_DEBUG_PLUGINS not q_debug_plugin.

Nathan Miguel

@SGaist In fact I researched this way, but even so I did not this option, nor to implement in code