#使用OpenGL绘制图片

message(STATUS "***** Find OpenGLWidget Library *****")


#寻找头文件，需要判断gcc编译器版本
unset(OpenGLWidget_INCLUDE_DIR CACHE)
unset(OpenGLWidget_SOURCE_DIR CACHE)

set(OpenGLWidget_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/src)
set(OpenGLWidget_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/src)

unset(libDebug CACHE)
unset(libRelease CACHE)
unset(OpenGLWidget_LIBRARY CACHE)
#查找库文件，需要判断操作系统，位数
if(CMAKE_SYSTEM_NAME MATCHES "Windows")
    #GCC编译器
    if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
        #64位
        if(CMAKE_SIZEOF_VOID_P EQUAL 8)
            #判断Qt版本，是Qt5.15还是5.12
            if(QT_VERSION_MAJOR EQUAL 5 AND QT_VERSION_MINOR EQUAL 15)
                set(libDebug ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.15.16/libOpenGLWidgetd.dll)
                set(libRelease ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.15.16/libOpenGLWidget.dll)
            elseif(QT_VERSION_MAJOR EQUAL 5 AND QT_VERSION_MINOR EQUAL 12)
                set(libDebug ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.12.12/libOpenGLWidgetd.dll)
                set(libRelease ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.12.12/libOpenGLWidget.dll)
            endif()
        #32位
        elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
            #判断Qt版本，是Qt5.15还是5.12
            if(QT_VERSION_MAJOR EQUAL 5 AND QT_VERSION_MINOR EQUAL 15)
                message(STATUS "32位仅支持Qt5.12.12版本")
            elseif(QT_VERSION_MAJOR EQUAL 5 AND QT_VERSION_MINOR EQUAL 12)
                set(libDebug ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.12.12/libOpenGLWidgetd.dll)
                set(libRelease ${CMAKE_CURRENT_LIST_DIR}/Libs/windows/Qt5.12.12/libOpenGLWidget.dll)
            endif()
        endif()
    #MSVC编译器
    elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
        message(STATUS "暂不支持MSVC编译器")
    endif()
#添加Linux版本
elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
    set(libDebug ${CMAKE_CURRENT_LIST_DIR}/Libs/linux/libOpenGLWidgetd.so)
    set(libRelease ${CMAKE_CURRENT_LIST_DIR}/Libs/linux/libOpenGLWidget.so)
#MacOS版本
elseif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
    #MacOS版本
    message(STATUS "暂不支持MacOS版本")

endif()

if(CMAKE_BUILD_TYPE MATCHES "Debug")
    list(APPEND OpenGLWidget_LIBRARY ${libDebug})
else()
    list(APPEND OpenGLWidget_LIBRARY ${libRelease})
endif()



if(OpenGLWidget_INCLUDE_DIR AND OpenGLWidget_SOURCE_DIR AND OpenGLWidget_LIBRARY)
    set(OpenGLWidget_FOUND TRUE)
    set(OpenGLWidget_VERSION 1.0.0.0)

    message(STATUS "include : OpenGLWidget_INCLUDE_DIR")
    message(STATUS "source : OpenGLWidget_SOURCE_DIR")

else()
    set(OpenGLWidget_FOUND FALSE)
endif()

message(STATUS "OpenGLWidget FOUND: ${OpenGLWidget_FOUND}")
message(STATUS "OpenGLWidget Version: ${OpenGLWidget_VERSION}")
message(STATUS "--------------------------------------------------")