如何使OpenGL ES2与Qt一起编译

Question

I'm trying to figure out how to get my Qt program to compile and link against OpenGL ES2 functions.

I've created a simple program that uses a QGLWidget to draw some simple triangles in my Qt application using the old OpenGL 1.0 pipeline. I'd like to use advanced 2.0 features like VBOs and shaders, so I started simply enough by trying to allocate some buffers for a VBO:

int ids[2];
glGenBuffers(2, ids);

Unfortunately, my project cannot find glGenBuffers() and I get the error message

GlWidget.cpp:103: error: 'glGenBuffers' was not declared in this scope

The start of qgl.h had the line "#elif defined(QT_OPENGL_ES_2)", so I tried setting that for the preprocessor, but it still couldn't find glGenBuffers().

I'm not sure what to try next. Please let me know how I can get my Qt program to use OpenGL ES2.

Here's the output I get when I compile:

"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE=/C/Qt/2010.02.1/qt/bin/qmake.exe SUBPROJECTS= .build-conf
make[1]: Entering directory `/c/dev/kitfox.com/biz/monsterRacing/proj/CharacterEditor'
/C/Qt/2010.02.1/qt/bin/qmake.exe VPATH=. -o qttmp-Debug.mk nbproject/qt-Debug.pro
mv -f qttmp-Debug.mk nbproject/qt-Debug.mk
"/usr/bin/make" -f nbproject/qt-Debug.mk dist/Debug/MinGW-Windows/CharacterEditor.exe
make[2]: Entering directory `/c/dev/kitfox.com/biz/monsterRacing/proj/CharacterEditor'
g++.exe -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I'c:/Qt/2010.02.1/qt/include/QtCore' -I'c:/Qt/2010.02.1/qt/include/QtGui' -I'c:/Qt/2010.02.1/qt/include/QtOpenGL' -I'c:/Qt/2010.02.1/qt/include' -I'c:/Qt/2010.02.1/qt/include/ActiveQt' -I'.' -I'.' -I'nbproject' -I'.' -I'c:/Qt/2010.02.1/qt/mkspecs/default' -o build/Debug/MinGW-Windows/main.o main.cpp
g++.exe -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I'c:/Qt/2010.02.1/qt/include/QtCore' -I'c:/Qt/2010.02.1/qt/include/QtGui' -I'c:/Qt/2010.02.1/qt/include/QtOpenGL' -I'c:/Qt/2010.02.1/qt/include' -I'c:/Qt/2010.02.1/qt/include/ActiveQt' -I'.' -I'.' -I'nbproject' -I'.' -I'c:/Qt/2010.02.1/qt/mkspecs/default' -o build/Debug/MinGW-Windows/MainForm.o MainForm.cpp
MainForm.cpp: In member function 'void MainForm::openFile()':
MainForm.cpp:78: warning: unused variable 'surfSet'
g++.exe -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I'c:/Qt/2010.02.1/qt/include/QtCore' -I'c:/Qt/2010.02.1/qt/include/QtGui' -I'c:/Qt/2010.02.1/qt/include/QtOpenGL' -I'c:/Qt/2010.02.1/qt/include' -I'c:/Qt/2010.02.1/qt/include/ActiveQt' -I'.' -I'.' -I'nbproject' -I'.' -I'c:/Qt/2010.02.1/qt/mkspecs/default' -o build/Debug/MinGW-Windows/GlWidget.o GlWidget.cpp
GlWidget.cpp: In member function 'void GlWidget::buildMesh()':
GlWidget.cpp:103: error: 'glGenBuffers' was not declared in this scope
make[2]: Leaving directory `/c/dev/kitfox.com/biz/monsterRacing/proj/CharacterEditor'
make[2]: *** [build/Debug/MinGW-Windows/GlWidget.o] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
make[1]: Leaving directory `/c/dev/kitfox.com/biz/monsterRacing/proj/CharacterEditor'

Answer 1

You Might Need GLEW. Here are some links to look at.

GLEW

Initializing GLEW

Here's where I got those links

Sorry if it's not what you're looking for.