CMakeLists.txt

cmake_minimum_required(VERSION 3.19)

project(VkRaytracer VERSION 0.5)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED True)

if(UNIX AND NOT APPLE)
	option(USE_WAYLAND "Use Wayland instead of X11" OFF)
	if(USE_WAYLAND)
		set(VOLK_STATIC_DEFINES VK_USE_PLATFORM_WAYLAND_KHR)
		set(GLFW_USE_WAYLAND TRUE)
	endif()
elseif(WIN32)
	set(VOLK_STATIC_DEFINES VK_USE_PLATFORM_WIN32_KHR)
endif()

add_subdirectory(dependencies/glfw)
add_subdirectory(dependencies/volk)
add_subdirectory(dependencies/glm)

file(GLOB_RECURSE CPP_SOURCES CONFIGURE_DEPENDS 
	"${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
file(GLOB_RECURSE HEADERS CONFIGURE_DEPENDS
	"${CMAKE_CURRENT_SOURCE_DIR}/include/*.hpp")

find_package(Vulkan REQUIRED FATAL_ERROR)

add_executable(VkRaytracer ${CPP_SOURCES} ${HEADERS})

target_include_directories(VkRaytracer PUBLIC "include" "dependencies/cgltf" "dependencies/stb-image" Vulkan_INCLUDE_DIRS)

target_link_libraries(VkRaytracer glfw volk::volk glm)

file(GLOB SHADERS "${CMAKE_CURRENT_SOURCE_DIR}/shaders/*")
file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/shaders")

list(FILTER SHADERS EXCLUDE REGEX ".*\.glsl")

foreach(SHADER IN LISTS SHADERS)
	get_filename_component(FILENAME ${SHADER} NAME_WLE)
	get_filename_component(EXTENSION ${SHADER} LAST_EXT)
	get_filename_component(SOURCEPATH ${SHADER} ABSOLUTE)

	string(SUBSTRING ${EXTENSION} 1 -1 EXTENSION)

	list(APPEND SHADER_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/shaders/depend-dummy-${FILENAME}.${EXTENSION}")
	add_custom_command(OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/shaders/depend-dummy-${FILENAME}.${EXTENSION}"
					   COMMAND "glslangValidator" ARGS "-g" "--target-env" "vulkan1.2" "-o" "${CMAKE_CURRENT_BINARY_DIR}/shaders/${FILENAME}-${EXTENSION}.spv" ${SOURCEPATH}
					   DEPENDS ${SOURCEPATH})
endforeach()

add_custom_target(shaders DEPENDS ${SHADER_DEPENDS})

add_dependencies(VkRaytracer shaders)