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# Copyright (C) 2021 Sony Interactive Entertainment Inc.
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#[=======================================================================[.rst:
FindOpenGLES2
--------------
Find OpenGL ES headers and libraries.
Imported Targets
^^^^^^^^^^^^^^^^
``OpenGL::GLES``
The OpenGL ES library, if found.
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables in your project:
``OpenGLES2_FOUND``
true if (the requested version of) OpenGL ES is available.
``OpenGLES2_VERSION``
the version of the OpenGL ES library.
``OpenGLES2_API_VERSION``
the version of the OpenGL ES API, this may be different than OpenGLES2_VERSION.
``OpenGLES2_LIBRARIES``
the libraries to link against to use OpenGL ES.
``OpenGLES2_INCLUDE_DIRS``
where to find the OpenGL ES2 headers.
``OpenGLES2_COMPILE_OPTIONS`
this should be passed to target_compile_options(), if the
target is not used for linking.
#]=======================================================================]
find_package(PkgConfig QUIET)
pkg_check_modules(PC_OPENGLES2 glesv2)
set(OpenGLES2_COMPILE_OPTIONS ${PC_OPENGLES2_CFLAGS_OTHER})
set(OpenGLES2_VERSION ${PC_OPENGLES2_VERSION})
find_path(OpenGLES2_INCLUDE_DIR
NAMES GLES2/gl2.h
HINTS ${PC_OPENGLES2_INCLUDEDIR} ${PC_OPENGLES2_INCLUDE_DIRS}
)
find_library(OpenGLES2_LIBRARY
NAMES ${OpenGLES2_NAMES} glesv2 GLESv2
HINTS ${PC_OPENGLES2_LIBDIR} ${PC_OPENGLES2_LIBRARY_DIRS}
)
# Look for OpenGL ES 3 headers existing to determine the API version
if (OpenGLES2_INCLUDE_DIR)
if (EXISTS ${OpenGLES2_INCLUDE_DIR}/GLES3/gl32.h)
set(OpenGLES2_API_VERSION "3.2")
elseif (EXISTS ${OpenGLES2_INCLUDE_DIR}/GLES3/gl31.h)
set(OpenGLES2_API_VERSION "3.1")
elseif (EXISTS ${OpenGLES2_INCLUDE_DIR}/GLES3/gl3.h)
set(OpenGLES2_API_VERSION "3.0")
else ()
set(OpenGLES2_API_VERSION "2.0")
endif ()
# Set the version of the library to the API version if not present
if (NOT OpenGLES2_VERSION)
set(OpenGLES2_VERSION ${OpenGLES2_API_VERSION})
endif ()
endif ()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(OpenGLES2
FOUND_VAR OpenGLES2_FOUND
REQUIRED_VARS OpenGLES2_LIBRARY OpenGLES2_INCLUDE_DIR
VERSION_VAR OpenGLES2_API_VERSION
)
if (OpenGLES2_LIBRARY AND NOT TARGET OpenGL::GLES)
add_library(OpenGL::GLES UNKNOWN IMPORTED GLOBAL)
set_target_properties(OpenGL::GLES PROPERTIES
IMPORTED_LOCATION "${OpenGLES2_LIBRARY}"
INTERFACE_COMPILE_OPTIONS "${OpenGLES2_COMPILE_OPTIONS}"
INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES2_INCLUDE_DIR}"
)
endif ()
mark_as_advanced(OpenGLES2_INCLUDE_DIR OpenGLES2_LIBRARY)
if (OpenGLES2_FOUND)
set(OpenGLES2_LIBRARIES ${OpenGLES2_LIBRARY})
set(OpenGLES2_INCLUDE_DIRS ${OpenGLES2_INCLUDE_DIR})
endif ()