# Copyright 2020-2021 Collabora, Ltd. # SPDX-License-Identifier: BSL-1.0 # Distributed under the Boost Software License, Version 1.0. # (See accompanying file LICENSE_1_0.txt or copy at # http://www.boost.org/LICENSE_1_0.txt) # # Original Author: # 2020-2021, Rylie Pavlik #[[.rst: FindOpenGLES --------------- Find the OpenGL ES graphics API. Components ^^^^^^^^^^ The following components are supported: * ``V1`` - OpenGL ES 1 (including emulation on OpenGL ES 2) * ``V2`` - OpenGL ES 2 * ``V3`` - OpenGL ES 3 * ``V31` - OpenGL ES 3.1 - same as 3 but checking also for gl31.h * ``V32` - OpenGL ES 3.2 - same as 3 but checking also for gl32.h If none are specified, the default is ``V2``. Targets ^^^^^^^ If successful, some subset of the following imported targets are created. * ``OpenGLES::OpenGLESv1`` * ``OpenGLES::OpenGLESv2`` * ``OpenGLES::OpenGLESv3`` * ``OpenGLES::OpenGLESv31`` * ``OpenGLES::OpenGLESv32`` Cache variables ^^^^^^^^^^^^^^^ The following cache variable may also be set to assist/control the operation of this module: ``OpenGLES_ROOT_DIR`` The root to search for OpenGLES. #]] set(OpenGLES_ROOT_DIR "${OpenGLES_ROOT_DIR}" CACHE PATH "Root to search for OpenGLES") if(NOT OpenGLES_FIND_COMPONENTS) set(OpenGLES_FIND_COMPONENTS V2) endif() if(NOT ANDROID) find_package(PkgConfig QUIET) if(PKG_CONFIG_FOUND) set(_old_prefix_path "${CMAKE_PREFIX_PATH}") # So pkg-config uses OpenGLES_ROOT_DIR too. if(OpenGLES_ROOT_DIR) list(APPEND CMAKE_PREFIX_PATH ${OpenGLES_ROOT_DIR}) endif() pkg_check_modules(PC_glesv1_cm QUIET glesv1_cm) pkg_check_modules(PC_glesv2 QUIET glesv2) # Restore set(CMAKE_PREFIX_PATH "${_old_prefix_path}") endif() endif() find_path( OpenGLES_V1_INCLUDE_DIR NAMES GLES/gl.h PATHS ${OpenGLES_ROOT_DIR} HINTS ${PC_glesv2_INCLUDE_DIRS} ${PC_glesv1_cm_INCLUDE_DIRS} PATH_SUFFIXES include) find_path( OpenGLES_V2_INCLUDE_DIR NAMES GLES2/gl2.h PATHS ${OpenGLES_ROOT_DIR} HINTS ${PC_glesv2_INCLUDE_DIRS} ${PC_glesv1_cm_INCLUDE_DIRS} PATH_SUFFIXES include) find_path( OpenGLES_V3_INCLUDE_DIR NAMES GLES3/gl3.h PATHS ${OpenGLES_ROOT_DIR} HINTS ${OpenGLES_V1_INCLUDE_DIR} ${OpenGLES_V2_INCLUDE_DIR} ${PC_glesv2_INCLUDE_DIRS} ${PC_glesv1_cm_INCLUDE_DIRS} PATH_SUFFIXES include) find_path( OpenGLES_V31_INCLUDE_DIR NAMES GLES3/gl31.h PATHS ${OpenGLES_ROOT_DIR} HINTS ${OpenGLES_V1_INCLUDE_DIR} ${OpenGLES_V2_INCLUDE_DIR} ${OpenGLES_V3_INCLUDE_DIR} ${PC_glesv2_INCLUDE_DIRS} ${PC_glesv1_cm_INCLUDE_DIRS} PATH_SUFFIXES include) find_path( OpenGLES_V32_INCLUDE_DIR NAMES GLES3/gl32.h PATHS ${OpenGLES_ROOT_DIR} HINTS ${OpenGLES_V1_INCLUDE_DIR} ${OpenGLES_V2_INCLUDE_DIR} ${OpenGLES_V3_INCLUDE_DIR} ${OpenGLES_V31_INCLUDE_DIR} ${PC_glesv2_INCLUDE_DIRS} ${PC_glesv1_cm_INCLUDE_DIRS} PATH_SUFFIXES include) find_library( OpenGLES_V1_LIBRARY NAMES GLES GLESv1_CM PATHS ${OpenGLES_ROOT_DIR} HINTS ${PC_glesv1_cm_LIBRARY_DIRS} PATH_SUFFIXES lib) find_library( OpenGLES_V2_LIBRARY NAMES GLESv2 OpenGLES # for Apple framework PATHS ${OpenGLES_ROOT_DIR} HINTS ${PC_glesv2_LIBRARY_DIRS} PATH_SUFFIXES lib) find_library( OpenGLES_V3_LIBRARY NAMES GLESv3 PATHS ${OpenGLES_ROOT_DIR} HINTS ${PC_glesv2_LIBRARY_DIRS} PATH_SUFFIXES lib) if(OpenGLES_V2_LIBRARY AND NOT OpenGLES_V3_LIBRARY) set(OpenGLES_V3_LIBRARY ${OpenGLES_V2_LIBRARY}) endif() set(_gles_required_vars) foreach(_comp IN LISTS OpenGLES_FIND_COMPONENTS) if(_comp STREQUAL "V1") list(APPEND _gles_required_vars OpenGLES_V1_LIBRARY OpenGLES_V1_INCLUDE_DIR) if(OpenGLES_V1_INCLUDE_DIR AND OpenGLES_V1_LIBRARY) set(OpenGLES_${_comp}_FOUND TRUE) else() set(OpenGLES_${_comp}_FOUND FALSE) endif() elseif(_comp STREQUAL "V2") list(APPEND _gles_required_vars OpenGLES_V2_LIBRARY OpenGLES_V2_INCLUDE_DIR) if(OpenGLES_V2_INCLUDE_DIR AND OpenGLES_V2_LIBRARY) set(OpenGLES_${_comp}_FOUND TRUE) else() set(OpenGLES_${_comp}_FOUND FALSE) endif() elseif(_comp STREQUAL "V3") list(APPEND _gles_required_vars OpenGLES_V3_LIBRARY OpenGLES_V3_INCLUDE_DIR) if(OpenGLES_V3_INCLUDE_DIR AND OpenGLES_V3_LIBRARY) set(OpenGLES_${_comp}_FOUND TRUE) else() set(OpenGLES_${_comp}_FOUND FALSE) endif() elseif(_comp STREQUAL "V31") list(APPEND _gles_required_vars OpenGLES_V3_LIBRARY OpenGLES_V31_INCLUDE_DIR) if(OpenGLES_V31_INCLUDE_DIR AND OpenGLES_V3_LIBRARY) set(OpenGLES_${_comp}_FOUND TRUE) else() set(OpenGLES_${_comp}_FOUND FALSE) endif() elseif(_comp STREQUAL "V32") list(APPEND _gles_required_vars OpenGLES_V3_LIBRARY OpenGLES_V32_INCLUDE_DIR) if(OpenGLES_V32_INCLUDE_DIR AND OpenGLES_V3_LIBRARY) set(OpenGLES_${_comp}_FOUND TRUE) else() set(OpenGLES_${_comp}_FOUND FALSE) endif() else() message( WARNING "${_comp} is not a recognized OpenGL-ES component/version") set(OpenGLES_${_comp}_FOUND FALSE) endif() endforeach() if(_gles_required_vars) list(REMOVE_DUPLICATES _gles_required_vars) endif() include(FindPackageHandleStandardArgs) find_package_handle_standard_args( OpenGLES REQUIRED_VARS ${_gles_required_vars} HANDLE_COMPONENTS) if(OpenGLES_FOUND) if(OpenGLES_V1_FOUND AND NOT TARGET OpenGLES::OpenGLESv1) add_library(OpenGLES::OpenGLESv1 SHARED IMPORTED) set_target_properties( OpenGLES::OpenGLESv1 PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES_V1_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION ${OpenGLES_V1_LIBRARY}) endif() if(OpenGLES_V2_FOUND AND NOT TARGET OpenGLES::OpenGLESv2) add_library(OpenGLES::OpenGLESv2 SHARED IMPORTED) set_target_properties( OpenGLES::OpenGLESv2 PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES_V2_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION ${OpenGLES_V2_LIBRARY}) endif() if(OpenGLES_V3_FOUND) if(NOT TARGET OpenGLES::OpenGLESv3) add_library(OpenGLES::OpenGLESv3 SHARED IMPORTED) set_target_properties( OpenGLES::OpenGLESv3 PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES_V3_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION ${OpenGLES_V3_LIBRARY}) endif() if(OpenGLES_V31_FOUND AND NOT TARGET OpenGLES::OpenGLESv31) add_library(OpenGLES::OpenGLESv31 SHARED IMPORTED) set_target_properties( OpenGLES::OpenGLESv31 PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES_V31_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION ${OpenGLES_V3_LIBRARY}) endif() if(OpenGLES_V32_FOUND AND NOT TARGET OpenGLES::OpenGLESv32) add_library(OpenGLES::OpenGLESv32 SHARED IMPORTED) set_target_properties( OpenGLES::OpenGLESv32 PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${OpenGLES_V32_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION ${OpenGLES_V3_LIBRARY}) endif() endif() mark_as_advanced( OpenGLES_V1_LIBRARY OpenGLES_V1_INCLUDE_DIR OpenGLES_V2_LIBRARY OpenGLES_V2_INCLUDE_DIR OpenGLES_V3_LIBRARY OpenGLES_V3_INCLUDE_DIR OpenGLES_V31_INCLUDE_DIR OpenGLES_V32_INCLUDE_DIR) endif() mark_as_advanced(OpenGLES_ROOT_DIR) include(FeatureSummary) set_package_properties( OpenGLES PROPERTIES URL "https://www.khronos.org/opengles/" DESCRIPTION "A cross-platform graphics API, specialized for mobile and embedded, defined as a subset of desktop OpenGL." )