How can I call “glEnable” using Android NDK?

Question

I'm trying to make the world's simplest test of an android environment, just to get all my ducks in a row before tackling the port.

The very FIRST thing I need to do is just link GLES 1.0 ... here's the steps I took:

ONE: Using Android Studio 2.3.2, I created a new C++ enabled project with a basic activity

TWO: in AndroidManifest.xml I added this:

<uses-feature android:glEsVersion="0x00010000" />

THREE: In CMakeLists.txt I added these lines:

find_package( ZLIB REQUIRED )
find_library( GLES1_LIBRARY names GLESv1_CM )
include_directories( ${ZLIB_INCLUDE_DIRS} ${GLES_INCLUDE_DIRS} )
...
target_link_libraries( # Specifies the target library.
                   native-lib
                   ${ZLIB_LIBRARIES}
                   ${GLES1_LIBRARIES}
                   ${log-lib} )

That works for log-lib, and it works for zlib too... it doesn't work for GLES1 (see next step)

FOUR: I just added one simple line to native-lib.cpp

 glEnable(GL_BLEND);

Hit compile and...

CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o: In function `Java_com_game_raptisoft_myapplication_MainActivity_stringFromJNI':
C:\Users\Raptisoft2011\Desktop\Android\MyApplication\app\src\main\cpp/native-lib.cpp:12: undefined reference to `glEnable'

How do I resolve this problem? Are there more link statements I need to include? I've tried various iterations of GLES1_LIBRARY (like GLES_LIBRARY, etc) but nothing works.

Answer 1

Try

target_link_libraries( # Specifies the target library.
               native-lib
               ${ZLIB_LIBRARIES}
               EGL
               GLESv1_CM
               ${log-lib} )

Also, you have targeted ${GLES1_LIBRARIES} , but above you've spelled it GLES1_LIBRARY

---

If you can, I would suggest porting to gles2. The most you would have to worry about is writing shaders, and it gives you better control over how your data is drawn.

---

BTW, is this the same Rapitsoft that created Chuzzle using the PopCap framework?