cmake_minimum_required(VERSION 3.10)
project(vksdlproj VERSION 0.1.0 LANGUAGES C CXX)

SET(CMAKE_BUILD_RPATH_USE_ORIGIN TRUE)
set(EXE_NAME project)

set(PROGRAM_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/src/vulkanapp.cc)

# Get our GLSL shaders
set(SHADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/shaders)
set(SHADER_BIN_DIR ${CMAKE_CURRENT_BINARY_DIR})
file(GLOB SHADERS ${SHADER_DIR}/*.vert
                  ${SHADER_DIR}/*.frag
                  ${SHADER_DIR}/*.comp
                  ${SHADER_DIR}/*.geom
                  ${SHADER_DIR}/*.tesc
                  ${SHADER_DIR}/*.tese
                  ${SHADER_DIR}/*.mesh
                  ${SHADER_DIR}/*.task
                  ${SHADER_DIR}/*.rgen
                  ${SHADER_DIR}/*.rchit
                  ${SHADER_DIR}/*.rmiss
                )

find_package(SDL2 REQUIRED CONFIG REQUIRED COMPONENTS SDL2)
find_package(Vulkan REQUIRED COMPONENTS glslc)

# Compile each shader
foreach(SHADER IN LISTS SHADERS)
    get_filename_component(FILENAME ${SHADER} NAME)
    add_custom_command(OUTPUT ${SHADER_BIN_DIR}/${FILENAME}.spv
        COMMAND ${Vulkan_GLSLC_EXECUTABLE} ${SHADER} -o ${SHADER_BIN_DIR}/${FILENAME}.spv
        DEPENDS ${SHADER}
        COMMENT "Compiling Shader ${FILENAME}")
    list(APPEND SPV_SHADERS ${SHADER_BIN_DIR}/${FILENAME}.spv)
endForeach()

# Shader target
add_custom_target(shaders ALL DEPENDS ${SPV_SHADERS})

add_executable(${EXE_NAME} ${CMAKE_SOURCE_DIR}/src/main.cc ${PROGRAM_SOURCES} ${SHADERS})
target_include_directories(${EXE_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/include)
add_dependencies(${EXE_NAME} shaders)

# Linking
target_link_libraries(${EXE_NAME} PRIVATE SDL2::SDL2)
target_link_libraries(${EXE_NAME} PRIVATE Vulkan::Vulkan)