2012-12-18  Yael Aharon  <yael.aharon@intel.com>

        [EFL] Allow the build system to find OpenGL ES

        https://bugs.webkit.org/show_bug.cgi?id=104760

        Reviewed by NOBODY (OOPS!).

        Add a way to find if GLESv2 is supported by the build system.

        Support for GLESv2 will be added separately.

        FindGLES.cmake is loosely based on the example from

        https://bitbucket.org/sinbad/ogre/src/3cbd67467fab3fef44d1b32bc42ccf4fb1ccfdd0/CMake/Packages/FindOpenGLES2.cmake?at=default.

        * Source/cmake/FindGLES.cmake: Added.

# - Try to find OpenGLES

# Once done this will define

#  

#  OPENGLES2_FOUND        - system has OpenGLESv2 installed.

#  OPENGLES2_INCLUDE_DIR  - directories which contain the OpenGlEsv2 headers.

#  OPENGLES2_LIBRARIES    - libraries required to link against OpenGLESv2

#

# Copyright (C) 2012 Intel Corporation. All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

# 1.  Redistributions of source code must retain the above copyright

#     notice, this list of conditions and the following disclaimer.

# 2.  Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS

# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

FIND_PATH(OPENGLES2_INCLUDE_DIR NAMES GLES2/gl2.h)

FIND_LIBRARY(OPENGLES2_gl_LIBRARY NAMES GLESv2)

IF(OPENGLES2_gl_LIBRARY)

    SET( OPENGLES2_LIBRARIES ${OPENGLES2_gl_LIBRARY} ${OPENGLES2_LIBRARIES})

    SET( OPENGLES2_FOUND "YES" )

ENDIF(OPENGLES2_gl_LIBRARY AND EGL_egl_LIBRARY)

MARK_AS_ADVANCED(OPENGLES2_INCLUDE_DIR OPENGLES2_gl_LIBRARY)