cmake_minimum_required(VERSION 3.20)
project(refdock_opengl LANGUAGES C CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(GLAD_DIR "${CMAKE_CURRENT_SOURCE_DIR}/glad" CACHE PATH "GLAD 2 generated directory")

add_library(glad STATIC "${GLAD_DIR}/src/gl.c")
target_include_directories(glad PUBLIC "${GLAD_DIR}/include")
target_link_libraries(glad PUBLIC ${CMAKE_DL_LIBS})

find_package(glfw3 3.4 REQUIRED)

foreach(sample frame triangle)
    add_executable(${sample} "${sample}.cpp")
    target_link_libraries(${sample} PRIVATE glad glfw)
endforeach()

option(BUILD_FREEGLUT_SAMPLE "Build the freeglut example" OFF)
if(BUILD_FREEGLUT_SAMPLE)
    find_package(GLUT REQUIRED)
    add_executable(freeglut-frame freeglut-frame.cpp)
    target_link_libraries(freeglut-frame PRIVATE glad GLUT::GLUT)
endif()