cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
cmake_policy(VERSION 2.8)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")

set(NAME vulkanExamples)

project(${NAME})

include_directories(external)
include_directories(external/glm)
include_directories(external/gli)
include_directories(external/assimp)
include_directories(base)

OPTION(USE_D2D_WSI "Build the project using Direct to Display swapchain" OFF)

# Use FindVulkan module added with CMAKE 3.7
if (NOT CMAKE_VERSION VERSION_LESS 3.7.0)
	message(STATUS "Using module to find Vulkan")
	find_package(Vulkan REQUIRED)
endif()

IF(WIN32)
	IF (NOT Vulkan_FOUND)
		find_library(Vulkan_LIBRARY NAMES vulkan-1 vulkan PATHS ${CMAKE_SOURCE_DIR}/libs/vulkan)
		IF (Vulkan_LIBRARY)
			set(Vulkan_FOUND ON)
		ENDIF()
	ENDIF()
	find_library(ASSIMP_LIBRARIES NAMES assimp libassimp.dll.a PATHS ${CMAKE_SOURCE_DIR}/libs/assimp)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVK_USE_PLATFORM_WIN32_KHR")
ELSE(WIN32)
	IF (NOT Vulkan_FOUND)
		find_library(Vulkan_LIBRARY NAMES vulkan HINTS "$ENV{VULKAN_SDK}/lib" "${CMAKE_SOURCE_DIR}/libs/vulkan" REQUIRED)
		IF (Vulkan_LIBRARY)
			set(Vulkan_FOUND ON)
		ENDIF()
	ENDIF()
	find_package(ASSIMP REQUIRED)
	find_package(Threads REQUIRED)
IF(USE_D2D_WSI)
	MESSAGE("Using direct to display extension...")
	add_definitions(-D_DIRECT2DISPLAY)
ELSE(USE_D2D_WSI)
	find_package(XCB REQUIRED)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVK_USE_PLATFORM_XCB_KHR")
ENDIF(USE_D2D_WSI)
	# Todo : android?
ENDIF(WIN32)

IF (NOT Vulkan_FOUND)
	message(FATAL_ERROR "Could not find Vulkan library!")
ELSE()
	message(STATUS ${Vulkan_LIBRARY})
ENDIF()

# Set preprocessor defines
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNOMINMAX -D_USE_MATH_DEFINES")

add_definitions(-D_CRT_SECURE_NO_WARNINGS)
add_definitions(-std=c++11)

file(GLOB SOURCE *.cpp base/*.cpp)

# Function for building single example
function(buildExample EXAMPLE_NAME)
	file(GLOB SOURCE *.cpp base/*.cpp ${EXAMPLE_NAME}/*.cpp)
	if(WIN32)
		add_executable(${EXAMPLE_NAME} WIN32 ${EXAMPLE_NAME}/${EXAMPLE_NAME}.cpp ${SOURCE})
		target_link_libraries(${EXAMPLE_NAME} ${Vulkan_LIBRARY} ${ASSIMP_LIBRARIES} ${WINLIBS})
	else(WIN32)
		add_executable(${EXAMPLE_NAME} ${EXAMPLE_NAME}/${EXAMPLE_NAME}.cpp ${SOURCE})
		target_link_libraries(${EXAMPLE_NAME} ${Vulkan_LIBRARY} ${ASSIMP_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
	endif(WIN32)
endfunction(buildExample)

# Build all examples
function(buildExamples)
	foreach(EXAMPLE ${EXAMPLES})
		buildExample(${EXAMPLE})
	endforeach(EXAMPLE)
endfunction(buildExamples)

# Compiler specific stuff
IF(MSVC)
	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc")
ENDIF(MSVC)

IF(WIN32)
	# Nothing here (yet)
ELSE(WIN32)
	link_libraries(${XCB_LIBRARIES} ${Vulkan_LIBRARY})
ENDIF(WIN32)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/bin/")

set(EXAMPLES 
	bloom
	computecullandlod
	computeparticles
	computeshader
	debugmarker
	deferred
	deferredmultisampling
	deferredshadows
	displacement
	distancefieldfonts
	gears
	geometryshader
	indirectdraw	
	instancing
	mesh
	multisampling
	multithreading
	occlusionquery
	offscreen
	parallaxmapping
	particlefire
	pipelines
	pushconstants
	radialblur
	raytracing
	scenerendering
	shadowmapping
	shadowmappingomni
	skeletalanimation
	sphericalenvmapping
	ssao
	subpasses
	terraintessellation
	tessellation
	textoverlay
	texture
	texture3d
	texturearray
	texturecubemap
	texturemipmapgen
	texturesparseresidency
	triangle
	vulkanscene
)

buildExamples()