Graphics Reference
In-Depth Information
If you are using a different emulator, locate the EGL and OpenGL ES 3.0
libraries for that library and set them to the CMake variables. After setting
the EGL and OpenGL ES 3.0 libraries, click Configure again in the cmake-
gui and then click Generate. You can now navigate to the folder you chose
to build the binaries in CMake and open
ES3_Book.sln
in Microsoft
Visual Studio. From this solution, you can build and run all of the sample
code for the topic.
If you do not have
libEGL.dll
and
libGLESv2.dll
in your path,
you will need to copy those files to the directory to which each
sample executable is built to be able to run the sample. Also, note
that libGLESv2 is the recommended Khronos naming convention
for the OpenGL ES 3.0 library. This is the same name as the OpenGL
ES 2.0 library. The names match because OpenGL ES 3.0 is backward
compatible with OpenGL ES 2.0; thus the same library can be used for
both APIs.
This section describes how to build the sample code using the PowerVR
OpenGL ES 3.0 Emulator on Ubuntu Linux (tested on Ubuntu 12.04.1
LTS 64-bit). In addition to installing the PowerVR OpenGL ES 3.0
Emulator (by default, this installs to
/opt/Imagination/PowerVR/
GraphicsSDK
), you will need to make sure you have installed the
appropriate packages, including cmake and gcc. A good starting point is
to install the following packages:
$ sudo apt-get install build-essential cmake cmake-curses-gui
To build the sample code, first create a build folder at the root of the
source project (where CMakeLists.txt is found):
~/src/opengles-book$ mkdir build
~/src/opengles-book/build$ cd build
~/src/opengles-book/build$ cmake ../
If all has gone correctly, you will likely see an error message that the
EGL_LIBRARY
and
OPENGLES3_LIBRARY
are not found. To set the libraries,
run the following (note that it is “ccmake” and not “cmake”):
~/src/opengles-book/build$ ccmake ../
You will see that the value of
EGL_LIBRARY
is
EGL_LIBRARY-NOTFOUND;
similarly,
OPENGLES3_LIBRARY
is set to
OPENGLES3_LIBRARY-NOTFOUND
.
