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CMAKE_MINIMUM_REQUIRED(VERSION 3.9)

PROJECT(vke VERSION 0.1.0 DESCRIPTION "Vulkan Engine")

SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
SET(CMAKE_CXX_FLAGS "-W -Wall")
SET(CMAKE_EXE_LINKER_FLAGS "-lm")

IF(NOT CMAKE_BUILD_TYPE)
  SET(CMAKE_BUILD_TYPE Debug)
ENDIF()

if (CMAKE_BUILD_TYPE STREQUAL "Debug")
	ADD_DEFINITIONS (-DDEBUG)
	OPTION(ENABLE_VALIDATION "enable vulkan validation layer" ON)
ELSE()
	OPTION(ENABLE_VALIDATION "enable vulkan validation layer" OFF)
ENDIF()

if (NOT VULKAN_SDK)
	set(VULKAN_SDK "$ENV{VULKAN_SDK}" CACHE STRING "LunarG Vulkan SDK path")
	if (VULKAN_SDK)
			set(ENV{VULKAN_SDK} ${VULKAN_SDK})
			SET(ENV{VK_LAYER_PATH} "${VULKAN_SDK}/etc/explicit_layer.d")
	endif ()
endif ()

MESSAGE(STATUS "VULKAN_SDK = $ENV{VULKAN_SDK}")
MESSAGE(STATUS "VK_LAYER_PATH = $ENV{VK_LAYER_PATH}")

include_directories(external/glm)
include_directories(external/gli)
include_directories(external/glfw)

if (NOT TARGET vkh_static)
	add_subdirectory (external/vkh)
endif()

FIND_PACKAGE(Vulkan REQUIRED)
#FIND_PACKAGE(GLI REQUIRED)
#FIND_PACKAGE(GLFW3)

FILE(GLOB SOURCES "src/*.cpp")

INCLUDE(GNUInstallDirs)

#CONFIGURE_FILE(vkh.pc.in vkh.pc @ONLY)
#INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/vkh.pc DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)

FUNCTION (setup_lib LibName)
	SET_TARGET_PROPERTIES(${LibName} PROPERTIES
			OUTPUT_NAME ${PROJECT_NAME}
			VERSION ${PROJECT_VERSION}
			SOVERSION 1
			PUBLIC_HEADER include/vke.h
	)
	TARGET_INCLUDE_DIRECTORIES(${LibName} PRIVATE
			${CMAKE_CURRENT_SOURCE_DIR}/include
			${CMAKE_CURRENT_SOURCE_DIR}/src
			${Vulkan_INCLUDE_DIRS}
			#${GLI_INCLUDE_DIR}
	)
	TARGET_LINK_LIBRARIES(${LibName}
		${Vulkan_LIBRARIES}
		vkh_static
		#${GLI_LIBRARY_DIR}
		#${GLFW3_LIBRARY}
	)
	INSTALL(TARGETS ${LibName}
		LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
		ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
		PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
ENDFUNCTION ()

ADD_LIBRARY("${PROJECT_NAME}_static" STATIC ${SOURCES})
SET_PROPERTY(TARGET "${PROJECT_NAME}_static" PROPERTY POSITION_INDEPENDENT_CODE OFF)
setup_lib ("${PROJECT_NAME}_static")

ADD_LIBRARY("${PROJECT_NAME}_shared" SHARED ${SOURCES})
SET_PROPERTY(TARGET "${PROJECT_NAME}_static" PROPERTY POSITION_INDEPENDENT_CODE ON)
setup_lib ("${PROJECT_NAME}_shared")