How to build OpenCV-2.4.13 with GTK3+?

G10DRAS
11 ●1 ●2 https://github.com/G10...

I have tried following cmake command :

cmake -D WITH_GTK3=ON -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_NEW_PYTHON_SUPPORT=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON ..

but I got following warning :

CMake Warning: Manually-specified variables were not used by the project: WITH_GTK3

Is it possible to build OpenCV-2.4.13 with GTK3+ support ? I am try to build it on Raspbian Jessie on Raspberry Pi 2 B.

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Seems OpenCV-2.4.13 is not supporting GTK+3.x.

G10DRAS (Feb 18 '17)edit

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answered Nov 10 '17

liberforce
1

GTK+ 3 seems to be supported only with opencv >= 3.0.0. See the GTK+ detection code in cmake/OpenCVFindLibsGUI.cmake.

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answered Feb 17 '17

StevenPuttemans

20029 ●16 ●82 ●207 http://stevenputtemans...

As far as I know, there is no GTK3 flag available in de CMAKE config yet, at least not in the visual one.

image description

But after digging around in the code I found out that you need to make sure Qt is disabled before GTK3 support is possible. Can you make sure that is true?

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answered Feb 19 '17

G10DRAS
11 ●1 ●2 https://github.com/G10...

updated Feb 19 '17

I further dig in to cmake and src code of opencv-2.4.13. Did some changes and finally able to compile opencv-2.4.13 with GTK+3.0. Now my application is running with opencv-2.4.13 and GTK+3.0.

To compile code with GTK+3.0 do following changes:

~/opencv-2.4.13/cmake/OpenCVFindLibsGUI.cmake

change gtk+-2.0 ===> gtk+-3.0

--- GTK ---

ocv_clear_vars(HAVE_GTK HAVE_GTHREAD HAVE_GTKGLEXT)
if(WITH_GTK AND NOT HAVE_QT)
  CHECK_MODULE(gtk+-3.0 HAVE_GTK)
  CHECK_MODULE(gthread-2.0 HAVE_GTHREAD)
  if(WITH_OPENGL)
    CHECK_MODULE(gtkglext-1.0 HAVE_GTKGLEXT)
  endif()
endif()

Use attached opencv-2.4.13/modules/highgui/src/window_gtk.cpphttps://drive.google.com/open?id=0Bzm...

and thats all. follow rest of the steps as usual.

Comments

I think it is better like this :

CHECK_MODULE(gtk+-3.0 HAVE_GTK)
if(NOT HAVE_GTK)
CHECK_MODULE(gtk+-2.0 HAVE_GTK)
endif()

LBerger (Feb 19 '17)edit

Yo! looks better.

G10DRAS (Feb 19 '17)edit

may be you can try an issue or Pull Requests

LBerger (Feb 19 '17)edit

Well, I think it is just an Hack, not a proper solution. I will test all my OpenCV code first and then decide on pull request. So far I got one error with GTK+3.0.

""GTK apps crashing with "Attempt to unlock mutex that was not locked"".

I need to comment out cv2.startWindowThread() in my code. Not sure if there are more.

G10DRAS (Feb 19 '17)edit

Impressive G10DRAS, May I know how did you work out the new window_gtk.cpp?

jimmychauck (Aug 5 '17)edit

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How to build OpenCV-2.4.13 with GTK3+?

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How to build OpenCV-2.4.13 with GTK3+?