SDL 2 Project build test.

README

work in progress build.

CMakeLists.txt

#================================================
# CMAKE BUILD
# WINDOW BUILD CURRENTLY
#================================================
cmake_minimum_required(VERSION 3.20) # FetchContent is available in 3.11+
message("CMAKE_BUILD_TYPE >>> "  ${CMAKE_BUILD_TYPE})
#convert checks for deubug / release
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE)

if(CMAKE_BUILD_TYPE STREQUAL "debug")
  set(CMAKE_BUILD_TYPE Debug)
  message("DEBUG mode ==============================================================")
elseif(CMAKE_BUILD_TYPE STREQUAL "release")
  set(CMAKE_BUILD_TYPE Release)
  message("RELEASE mode ==============================================================")
else()
  set(CMAKE_BUILD_TYPE Debug)
  message("NONE mode ==============================================================")
endif()



project(sdl2app VERSION 0.0.1)

set(PROJECT_VERSION 0.0.1)
set(PROJECT_VERSION_MAJOR 0)
set(PROJECT_VERSION_MINOR 0)
set(PROJECT_VERSION_PATCH 0)

message("START OF CMAKELIST...")
# https://bewagner.net/programming/2020/05/02/cmake-fetchcontent/
set(FETCHCONTENT_FULLY_DISCONNECTED ON) # When this option is enabled, no attempt is made to download or update any content.
#set(FETCHCONTENT_UPDATES_DISCONNECTED ON) # download and skip update
#================================================
# CONFIGS
#================================================
# deal with add ons and checks tests
# WINDOW / INPUT / CPU RENDER
set(ENABLE_SDL ON)
# FONT
set(ENABLE_FREETYPE OFF) #needed for sdl image
set(ENABLE_SDL_TTF OFF)
# IMAGE
set(ENABLE_SDL_IMAGE OFF)
# SOUND / AUDIO
set(ENABLE_SDL_MIXER ON)
# ENTITY COMPONENT SYSTEM
set(ENABLE_FLECS OFF)
# GRAPHIC USER INTERFACE
set(ENABLE_IMGUI ON)
# 3D GRAPHIC API
set(ENABLE_VALKUN ON)
#================================================
# NETWORK
#================================================
#https://github.com/ValveSoftware/GameNetworkingSockets/blob/master/BUILDING.md
set(ENABLE_GAMENETWORKKINGSOCKETS OFF) # not recommend 
# there no CMakeList.txt in third parties.
# REQUIRED openssl
# REQUIRED perl
# REQUIRED ninja
# REQUIRED Protobuf

#================================================
# GIT PACKAGE VERSION
#================================================
set(FREETYPE_GIT_VERSION VER-2-10-4) # GITHUB RELEASE TAG

set(SDL_GIT_VERSION release-2.0.14) # SDL GITHUB RELEASE TAG
set(SDL_TTF_GIT_VERSION main) # SDL GITHUB RELEASE TAG
set(SDL_IMAGE_GIT_VERSION main) # SDL GITHUB RELEASE TAG
set(SDL_MIXER_GIT_VERSION master) # SDL GITHUB RELEASE TAG
set(IMGUI_GIT_VERSION 
  docking
  #v1.82
) # GITHUB RELEASE TAG
set(FLECS_GIT_VERSION v2.3.2) # GITHUB RELEASE TAG
set(GAMENETWORKKINGSOCKETS_GIT_VERSION master) # GITHUB RELEASE TAG
#================================================
# ENTERY POINTS
#================================================
# entry point file.cpp
set(ENTRYPOINT 
  src/main.cpp
  #src/sdl2window.cpp
  #src/windowimguisdl.cpp)
  #src/vulkan_imgui.cpp
  #src/vulkan_imgui_editor.cpp

  #tests/sdl2_mixer_test01.c
)
message("ENTRYPOINT: ${ENTRYPOINT}") # console log
# config IDE ext 
#include(CTest)
#enable_testing()
#================================================
# CONFIGS
#================================================
#et(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)
message("CMAKE_SYSTEM_NAME == " ${CMAKE_SYSTEM_NAME})
if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
  #target_compile_options(myApp PRIVATE /W4)
  #message("WINDOW")
elseif (CMAKE_SYSTEM_NAME STREQUAL "Linux")
  #target_compile_options(myApp PRIVATE -Wall -Wextra -Wpedantic)
  #message("Linux")
elseif (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
  # other macOS-specific flags for Clang
  #message("Darwin")
endif()
# https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html
#cmake -DCMAKE_BUILD_TYPE=Debug path/to/source
#cmake -DCMAKE_BUILD_TYPE=Release path/to/source

#message("CMAKE_C_FLAGS_RELEASE >>> "  ${CMAKE_C_FLAGS_RELEASE})
#message("CMAKE_C_FLAGS >>> "  ${CMAKE_C_FLAGS})
#message("CMAKE_CXX_FLAGS >>> "  ${CMAKE_CXX_FLAGS})
#message("CMAKE_CONFIGURATION_TYPES >>> "  ${CMAKE_CONFIGURATION_TYPES})
#message("CMAKE_CFG_INTDIR >>> "  ${CMAKE_CFG_INTDIR})
#message("CMAKE_CUDA_FLAGS >>> "  ${CMAKE_CUDA_FLAGS})
#message("CMAKE_Fortran_FLAGS >>> "  ${CMAKE_Fortran_FLAGS})

message("CMAKE_CURRENT_SOURCE_DIR  >>>  " ${CMAKE_CURRENT_SOURCE_DIR})
message("CMAKE_CURRENT_BINARY_DIR  >>>  " ${CMAKE_CURRENT_BINARY_DIR})


# must set output build dir by default is none. user must config manual
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})

message("CMAKE_ARCHIVE_OUTPUT_DIRECTORY: ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}") # workspace/build/Debug
message("CMAKE_LIBRARY_OUTPUT_DIRECTORY: ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}")
message("CMAKE_RUNTIME_OUTPUT_DIRECTORY: ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}")

# build compiler tool
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)

#ADD_DEFINITIONS(-DUNICODE)
#ADD_DEFINITIONS(-D_UNICODE)

# folders, files, libs
set(CPP_INCLUDE_DIRS "")
set(CPP_HEADER_FILES "")
set(CPP_SOURCE_FILES "")
set(CPP_LIBS "")

if(ENABLE_FREETYPE)
  if (NOT freetype_FOUND) # If there's none, fetch and build
    include(FetchContent)
    FetchContent_Declare(
      freetype
      GIT_REPOSITORY https://github.com/freetype/freetype.git
      GIT_TAG ${FREETYPE_GIT_VERSION}
      #GIT_TAG VER-2-10-4
    )
    FetchContent_GetProperties(freetype)
    if (NOT freetype_POPULATED) # Have we downloaded raylib yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(freetype)
      message("freetype_LIBRARY: " ${freetype_LIBRARY}) # fail but define in cmake
      message("freetype_INCLUDE_DIR: " ${freetype_INCLUDE_DIR}) #pass
      message("freetype_SOURCE_DIR: " ${freetype_SOURCE_DIR}) # pass
      message("freetype_BINARY_DIR: " ${freetype_BINARY_DIR}) # pass

      #set(FT_WITH_ZLIB OFF CACHE BOOL "" FORCE)
      #set(FT_WITH_BZIP2 OFF CACHE BOOL "" FORCE)
      #set(FT_WITH_PNG OFF CACHE BOOL "" FORCE)
      #set(FT_WITH_HARFBUZZ OFF CACHE BOOL "" FORCE)
      #set(FT_WITH_BROTLI OFF CACHE BOOL "" FORCE)

      # build freetype
      list(APPEND CPP_INCLUDE_DIRS ${freetype_SOURCE_DIR}/include)
      list(APPEND CPP_INCLUDE_DIRS ${freetype_BINARY_DIR}/include)
      list(APPEND CPP_HEADER_FILES ${freetype_SOURCE_DIR}/include/ft2build.h)
      
      list(APPEND FREETYPE_INCLUDE_DIRS ${freetype_SOURCE_DIR}/include)
      list(APPEND FREETYPE_INCLUDE_DIRS ${freetype_BINARY_DIR}/include)

      set(FREETYPE_LIBRARY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY})

      #link_directories(${sdl_ttf_BINARY_DIR}/Debug)# this will look for libs files.
      add_subdirectory(${freetype_SOURCE_DIR} ${freetype_BINARY_DIR}) #add to build in sub dir
      add_library(Freetype::Freetype ALIAS freetype)

    endif()
  endif()
endif()

#================================================
# SDL
#================================================
message("[[[=== CHECKING SDL SECTION === ]]]")
if (ENABLE_SDL)
  # base on environment system path variable set.
  # find_package(sdl QUIET) # Requires at least version 2.5.0
  message("sdl_FOUND:" ${SDL_FOUND})
  if (NOT sdl_FOUND) # If there's none, fetch and build sdl
    include(FetchContent)
    FetchContent_Declare(
      sdl
      GIT_REPOSITORY https://github.com/libsdl-org/SDL.git
      GIT_TAG ${SDL_GIT_VERSION}
    )
    FetchContent_GetProperties(sdl)
    if (NOT SDL2_POPULATED) # Have we downloaded raylib yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(sdl)
      #message("SDL_LIBRARY: " ${sdl_LIBRARY}) # fail but define in cmake
      #message("SDL_INCLUDE_DIR: " ${sdl_INCLUDE_DIR}) #pass
      #message("sdl_SOURCE_DIR: " ${sdl_SOURCE_DIR}) # pass
      #message("sdl_BINARY_DIR: " ${sdl_BINARY_DIR}) # pass
      # build SDL2
      list(APPEND CPP_INCLUDE_DIRS ${sdl_SOURCE_DIR}/include)
      #include_directories(${sdl2_BINARY_DIR}/include) 

      link_directories(${PROJECT_BINARY_DIR}/Debug)
      add_subdirectory(${sdl_SOURCE_DIR} ${sdl_BINARY_DIR})
      
      #needed for sub modules
      list(APPEND SDL2_INCLUDE_DIR ${sdl_SOURCE_DIR}/include)

      list(APPEND SDL2_LIBRARIES ${PROJECT_SOURCE_DIR}/build/Debug/SDL2maind.lib)
      list(APPEND SDL2_LIBRARIES ${PROJECT_SOURCE_DIR}/build/Debug/SDL2-staticd.lib)
      list(APPEND SDL2_LIBRARIES ${PROJECT_SOURCE_DIR}/build/Debug/SDL2d.lib)

      #list(APPEND SDL2_LIBRARY ${PROJECT_BINARY_DIR}/Debug/SDL2maind.lib)
      #list(APPEND SDL2_LIBRARY ${PROJECT_BINARY_DIR}/Debug/SDL2-staticd.lib)
      #list(APPEND SDL2_LIBRARY ${PROJECT_BINARY_DIR}/Debug/SDL2d.lib)

      #list(APPEND SDL2_LIB ${PROJECT_SOURCE_DIR}/build/Debug/SDL2maind.lib)
      #list(APPEND SDL2_LIB ${PROJECT_SOURCE_DIR}/build/Debug/SDL2-staticd.lib)
      #list(APPEND SDL2_LIB ${PROJECT_SOURCE_DIR}/build/Debug/SDL2d.lib)

      list(APPEND CPP_LIBS "SDL2main")
      list(APPEND CPP_LIBS "SDL2-static")
      add_library(SDL2::SDL2 ALIAS SDL2)
      add_library(SDL2::SDL2-static ALIAS SDL2-static)

    endif()
  endif()
endif()

if (ENABLE_SDL_TTF)
  # base on environment system path variable set.
  if (NOT sdl_image_FOUND) # If there's none, fetch and build sdl
    include(FetchContent)
    FetchContent_Declare(
      sdl_ttf
      GIT_REPOSITORY https://github.com/libsdl-org/SDL_ttf.git
      GIT_TAG ${SDL_TTF_GIT_VERSION}
    )
    FetchContent_GetProperties(sdl_ttf)
    if (NOT sdl_ttf_POPULATED) # Have we downloaded raylib yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(sdl_ttf)
      #message("sdl_ttf_LIBRARY: " ${sdl_ttf_LIBRARY}) # fail but define in cmake
      #message("sdl_ttf_INCLUDE_DIR: " ${sdl_ttf_INCLUDE_DIR}) #pass
      #message("sdl_ttf_SOURCE_DIR: " ${sdl_ttf_SOURCE_DIR}) # pass
      #message("sdl_ttf_BINARY_DIR: " ${sdl_ttf_BINARY_DIR}) # pass
      # build SDL2
      #list(APPEND CPP_INCLUDE_DIRS ${sdl_image_SOURCE_DIR}/include)
      add_subdirectory(${sdl_ttf_SOURCE_DIR} ${sdl_ttf_BINARY_DIR})
      #list(APPEND CPP_LIBS "sdl_ttf")
    endif()
  endif()
endif()

if (ENABLE_SDL_IMAGE)
  # base on environment system path variable set.
  if (NOT sdl_image_FOUND) # If there's none, fetch and build sdl
    include(FetchContent)
    FetchContent_Declare(
      sdl_image
      GIT_REPOSITORY https://github.com/libsdl-org/SDL_image.git
      GIT_TAG ${SDL_IMAGE_GIT_VERSION}
    )
    FetchContent_GetProperties(sdl_image)
    if (NOT sdl_image_POPULATED) # Have we downloaded raylib yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(sdl_image)
      #message("sdl_image_LIBRARY: " ${sdl_image_LIBRARY}) # fail but define in cmake
      #message("sdl_image_INCLUDE_DIR: " ${sdl_image_INCLUDE_DIR}) #pass
      #message("sdl_image_SOURCE_DIR: " ${sdl_image_SOURCE_DIR}) # pass
      #message("sdl_image_BINARY_DIR: " ${sdl_image_BINARY_DIR}) # pass
      set(SUPPORT_JPG OFF CACHE BOOL "" FORCE)
      set(SUPPORT_PNG ON CACHE BOOL "" FORCE)
      set(BUILD_SHOWIMAGE OFF CACHE BOOL "" FORCE)
      set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
      # BUILD_SHARED_LIBS OFF is LIB

      # build sdl2 image
      #list(APPEND CPP_INCLUDE_DIRS ${sdl_image_SOURCE_DIR}/include)
      add_subdirectory(${sdl_image_SOURCE_DIR} ${sdl_image_BINARY_DIR})
      #list(APPEND CPP_LIBS "SDL2_image")
    endif()
  endif()
endif()

if (ENABLE_SDL_MIXER)
  # base on environment system path variable set.
  if (NOT sdl_mixer_FOUND) # If there's none, fetch and build sdl
    include(FetchContent)
    FetchContent_Declare(
      sdl_mixer
      GIT_REPOSITORY https://github.com/libsdl-org/SDL_mixer.git
      GIT_TAG ${SDL_MIXER_GIT_VERSION}
    )
    FetchContent_GetProperties(sdl_mixer)
    if (NOT sdl_mixer_POPULATED) # Have we downloaded raylib yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(sdl_mixer)
      #message("sdl_mixer_LIBRARY: " ${sdl_mixer_LIBRARY}) # fail but define in cmake
      #message("sdl_mixer_INCLUDE_DIR: " ${sdl_mixer_INCLUDE_DIR}) #pass
      #message("sdl_mixer_SOURCE_DIR: " ${sdl_mixer_SOURCE_DIR}) # pass
      #message("sdl_mixer_BINARY_DIR: " ${sdl_mixer_BINARY_DIR}) # pass

      set(ANDROID ON)
      set(SUPPORT_OGG ON CACHE BOOL "" FORCE)
      #set(SUPPORT_OGG ON CACHE BOOL "" FORCE)

      # build SDL2 MIXER
      list(APPEND CPP_INCLUDE_DIRS ${sdl_mixer_SOURCE_DIR}/include)
      add_subdirectory(${sdl_mixer_SOURCE_DIR} ${sdl_mixer_BINARY_DIR})
      list(APPEND CPP_LIBS "SDL2_mixer")
    endif()
  endif()
endif()
#================================================
# FLECS
#================================================
message("[[[=== CHECKING FLECS SECTION === ]]]")
if (ENABLE_FLECS)
  #find_package(flecs QUIET) # Requires at least version 2.5.0
  if (NOT flecs_FOUND) # If there's none, fetch and build flecs
    include(FetchContent)
    FetchContent_Declare(
      flecs
      GIT_REPOSITORY https://github.com/SanderMertens/flecs.git
      GIT_TAG ${FLECS_GIT_VERSION}
    )
    FetchContent_GetProperties(flecs)
    if (NOT flecs_POPULATED) # Have we downloaded flecs yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(flecs)
      # build flecs
      add_subdirectory(${flecs_SOURCE_DIR} ${flecs_BINARY_DIR})
    endif()
  endif()
endif()
#================================================
# IMGUI
#================================================
message("[[[=== CHECKING IMGUI SECTION === ]]]")
if (ENABLE_IMGUI)
  #find_package(imgui QUIET) # Requires at least version 2.5.0
  if (NOT imgui_FOUND) # If there's none, fetch and build imgui
    include(FetchContent)
    FetchContent_Declare(
      imgui
      GIT_REPOSITORY https://github.com/ocornut/imgui.git
      GIT_TAG ${IMGUI_GIT_VERSION}
    )
    FetchContent_GetProperties(imgui)
    if (NOT imgui_POPULATED) # Have we downloaded imgui yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(imgui)
      message("imgui_SOURCE_DIR: " ${imgui_SOURCE_DIR})
      list(APPEND CPP_INCLUDE_DIRS ${imgui_SOURCE_DIR})
      list(APPEND CPP_INCLUDE_DIRS ${imgui_SOURCE_DIR}/backends)
      #INCLUDE_HEADERS
      #list(APPEND INCLUDE_HEADERS ${imgui_SOURCE_DIR}/imconfig.h)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/imgui.cpp)
      list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/imgui.h)

      list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/imgui_internal.h)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/imgui_demo.cpp)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/imgui_draw.cpp)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/imgui_tables.cpp)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/imgui_widgets.cpp)
      #list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/imstb_rectpack.h)
      #list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/imstb_textedit.h)
      #list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/imstb_truetype.h)
      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/backends/imgui_impl_sdl.cpp)
      list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/backends/imgui_impl_sdl.h)

      list(APPEND CPP_SOURCE_FILES ${imgui_SOURCE_DIR}/backends/imgui_impl_vulkan.cpp)
      list(APPEND CPP_HEADER_FILES ${imgui_SOURCE_DIR}/backends/imgui_impl_vulkan.h)

    endif()
  endif()
endif()
#================================================
# VULKAN
#================================================
message("[[[=== CHECKING VULKAN SECTION === ]]]")
if(ENABLE_VALKUN)
  #look for Vulkan SDK location
  find_package(Vulkan)

  if(NOT Vulkan_FOUND)
    message("NOT FOUND VULKAN")
    return()
  endif()

  if(Vulkan_FOUND)
    set(VULKAN_PATH ${Vulkan_INCLUDE_DIRS})
    STRING(REGEX REPLACE "/Include" "" VULKAN_PATH ${VULKAN_PATH})
  endif()

  # vulkan-1 library for build Vulkan application.
  #set(VULKAN_LIB_LIST "vulkan-1")
  list(APPEND CPP_LIBS "vulkan-1")

  if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
    message("VULKAN_PATH " ${VULKAN_PATH})
    # Include Vulkan header files from Vulkan SDK
    #include_directories(AFTER ${VULKAN_PATH}/Include)
    list(APPEND CPP_INCLUDE_DIRS ${Vulkan_INCLUDE_DIRS})

    # Link directory for vulkan-1
    link_directories(${VULKAN_PATH}/Bin;${VULKAN_PATH}/Lib;)
  endif()
endif()

#not working required third paty libs
if(ENABLE_GAMENETWORKKINGSOCKETS)
  if (NOT gamenetworkingsockets_FOUND) # If there's none, fetch and build flecs
    include(FetchContent)
    FetchContent_Declare(
      gamenetworkingsockets
      GIT_REPOSITORY https://github.com/ValveSoftware/GameNetworkingSockets.git
      GIT_TAG ${GAMENETWORKKINGSOCKETS_GIT_VERSION}
    )
    FetchContent_GetProperties(flecs)
    if (NOT gamenetworkingsockets_POPULATED) # Have we downloaded flecs yet?
      set(FETCHCONTENT_QUIET NO)
      FetchContent_Populate(gamenetworkingsockets)
      set(GAMENETWORKINGSOCKETS_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
      set(GAMENETWORKINGSOCKETS_BUILD_TESTS OFF CACHE BOOL "" FORCE)
      # build gamenetworkingsockets
      add_subdirectory(${gamenetworkingsockets_SOURCE_DIR} ${gamenetworkingsockets_BINARY_DIR})

    endif()
  endif()
endif()

#================================================
# TARGET SET UP SECTION
#================================================


#================================================
# INCLUDE DIRS
#================================================
include_directories(${CPP_INCLUDE_DIRS})
#================================================
# EXECUTE APP
#================================================
#add_executable(${PROJECT_NAME} ${ENTRYPOINT})
add_executable(${PROJECT_NAME} 
  ${CPP_HEADER_FILES}
  ${CPP_SOURCE_FILES}
  ${ENTRYPOINT} 
)
#================================================
# LIBRARIES
#================================================
target_link_libraries(${PROJECT_NAME} 
  ${CPP_LIBS}
  #opengl32
  #jpeg
)
#================================================
# INCLUDE DIRS
#================================================
#target_include_directories(${PROJECT_NAME} 
  #PRIVATE 
  #${INCLUDE_PATHS}
#)
#target_link_libraries(${PROJECT_NAME} SDL2main SDL2-static)
#target_link_libraries(${PROJECT_NAME} PRIVATE SDL2main SDL2-static flecs_static ${VULKAN_LIB_LIST})
#================================================
# COMPILER
#================================================
#target_compile_options(${PROJECT_NAME} PRIVATE -Wall)
#set(CPACK_PROJECT_NAME ${PROJECT_NAME})
#set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
#include(CPack)
message("END OF CMAKELIST...")

vulkan_imgui_editor.cpp

// Dear ImGui: standalone example application for SDL2 + Vulkan
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs

// Important note to the reader who wish to integrate imgui_impl_vulkan.cpp/.h in their own engine/app.
// - Common ImGui_ImplVulkan_XXX functions and structures are used to interface with imgui_impl_vulkan.cpp/.h.
//   You will use those if you want to use this rendering backend in your engine/app.
// - Helper ImGui_ImplVulkanH_XXX functions and structures are only used by this example (main.cpp) and by
//   the backend itself (imgui_impl_vulkan.cpp), but should PROBABLY NOT be used by your own engine/app code.
// Read comments in imgui_impl_vulkan.h.

#include "imgui.h"
#include "imgui_impl_sdl.h"
#include "imgui_impl_vulkan.h"
#include <stdio.h>          // printf, fprintf
#include <stdlib.h>         // abort
#include <SDL.h>
#include <SDL_vulkan.h>
#include <vulkan/vulkan.h>

//#define IMGUI_UNLIMITED_FRAME_RATE
#ifdef _DEBUG
#define IMGUI_VULKAN_DEBUG_REPORT
#endif

static VkAllocationCallbacks*   g_Allocator = NULL;
static VkInstance               g_Instance = VK_NULL_HANDLE;
static VkPhysicalDevice         g_PhysicalDevice = VK_NULL_HANDLE;
static VkDevice                 g_Device = VK_NULL_HANDLE;
static uint32_t                 g_QueueFamily = (uint32_t)-1;
static VkQueue                  g_Queue = VK_NULL_HANDLE;
static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
static VkPipelineCache          g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool         g_DescriptorPool = VK_NULL_HANDLE;

static ImGui_ImplVulkanH_Window g_MainWindowData;
static uint32_t                 g_MinImageCount = 2;
static bool                     g_SwapChainRebuild = false;

static void check_vk_result(VkResult err)
{
    if (err == 0)
        return;
    fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
    if (err < 0)
        abort();
}

#ifdef IMGUI_VULKAN_DEBUG_REPORT
static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags, VkDebugReportObjectTypeEXT objectType, uint64_t object, size_t location, int32_t messageCode, const char* pLayerPrefix, const char* pMessage, void* pUserData)
{
    (void)flags; (void)object; (void)location; (void)messageCode; (void)pUserData; (void)pLayerPrefix; // Unused arguments
    fprintf(stderr, "[vulkan] Debug report from ObjectType: %i\nMessage: %s\n\n", objectType, pMessage);
    return VK_FALSE;
}
#endif // IMGUI_VULKAN_DEBUG_REPORT

static void SetupVulkan(const char** extensions, uint32_t extensions_count)
{
    VkResult err;

    // Create Vulkan Instance
    {
        VkInstanceCreateInfo create_info = {};
        create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
        create_info.enabledExtensionCount = extensions_count;
        create_info.ppEnabledExtensionNames = extensions;
#ifdef IMGUI_VULKAN_DEBUG_REPORT
        // Enabling validation layers
        const char* layers[] = { "VK_LAYER_KHRONOS_validation" };
        create_info.enabledLayerCount = 1;
        create_info.ppEnabledLayerNames = layers;

        // Enable debug report extension (we need additional storage, so we duplicate the user array to add our new extension to it)
        const char** extensions_ext = (const char**)malloc(sizeof(const char*) * (extensions_count + 1));
        memcpy(extensions_ext, extensions, extensions_count * sizeof(const char*));
        extensions_ext[extensions_count] = "VK_EXT_debug_report";
        create_info.enabledExtensionCount = extensions_count + 1;
        create_info.ppEnabledExtensionNames = extensions_ext;

        // Create Vulkan Instance
        err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
        check_vk_result(err);
        free(extensions_ext);

        // Get the function pointer (required for any extensions)
        auto vkCreateDebugReportCallbackEXT = (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
        IM_ASSERT(vkCreateDebugReportCallbackEXT != NULL);

        // Setup the debug report callback
        VkDebugReportCallbackCreateInfoEXT debug_report_ci = {};
        debug_report_ci.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT;
        debug_report_ci.flags = VK_DEBUG_REPORT_ERROR_BIT_EXT | VK_DEBUG_REPORT_WARNING_BIT_EXT | VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;
        debug_report_ci.pfnCallback = debug_report;
        debug_report_ci.pUserData = NULL;
        err = vkCreateDebugReportCallbackEXT(g_Instance, &debug_report_ci, g_Allocator, &g_DebugReport);
        check_vk_result(err);
#else
        // Create Vulkan Instance without any debug feature
        err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
        check_vk_result(err);
        IM_UNUSED(g_DebugReport);
#endif
    }

    // Select GPU
    {
        uint32_t gpu_count;
        err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, NULL);
        check_vk_result(err);
        IM_ASSERT(gpu_count > 0);

        VkPhysicalDevice* gpus = (VkPhysicalDevice*)malloc(sizeof(VkPhysicalDevice) * gpu_count);
        err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
        check_vk_result(err);

        // If a number >1 of GPUs got reported, find discrete GPU if present, or use first one available. This covers
        // most common cases (multi-gpu/integrated+dedicated graphics). Handling more complicated setups (multiple
        // dedicated GPUs) is out of scope of this sample.
        int use_gpu = 0;
        for (int i = 0; i < (int)gpu_count; i++)
        {
            VkPhysicalDeviceProperties properties;
            vkGetPhysicalDeviceProperties(gpus[i], &properties);
            if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
            {
                use_gpu = i;
                break;
            }
        }

        g_PhysicalDevice = gpus[use_gpu];
        free(gpus);
    }

    // Select graphics queue family
    {
        uint32_t count;
        vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, NULL);
        VkQueueFamilyProperties* queues = (VkQueueFamilyProperties*)malloc(sizeof(VkQueueFamilyProperties) * count);
        vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, queues);
        for (uint32_t i = 0; i < count; i++)
            if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
            {
                g_QueueFamily = i;
                break;
            }
        free(queues);
        IM_ASSERT(g_QueueFamily != (uint32_t)-1);
    }

    // Create Logical Device (with 1 queue)
    {
        int device_extension_count = 1;
        const char* device_extensions[] = { "VK_KHR_swapchain" };
        const float queue_priority[] = { 1.0f };
        VkDeviceQueueCreateInfo queue_info[1] = {};
        queue_info[0].sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
        queue_info[0].queueFamilyIndex = g_QueueFamily;
        queue_info[0].queueCount = 1;
        queue_info[0].pQueuePriorities = queue_priority;
        VkDeviceCreateInfo create_info = {};
        create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
        create_info.queueCreateInfoCount = sizeof(queue_info) / sizeof(queue_info[0]);
        create_info.pQueueCreateInfos = queue_info;
        create_info.enabledExtensionCount = device_extension_count;
        create_info.ppEnabledExtensionNames = device_extensions;
        err = vkCreateDevice(g_PhysicalDevice, &create_info, g_Allocator, &g_Device);
        check_vk_result(err);
        vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
    }

    // Create Descriptor Pool
    {
        VkDescriptorPoolSize pool_sizes[] =
        {
            { VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
            { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
            { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
            { VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
        };
        VkDescriptorPoolCreateInfo pool_info = {};
        pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
        pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
        pool_info.maxSets = 1000 * IM_ARRAYSIZE(pool_sizes);
        pool_info.poolSizeCount = (uint32_t)IM_ARRAYSIZE(pool_sizes);
        pool_info.pPoolSizes = pool_sizes;
        err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
        check_vk_result(err);
    }
}

// All the ImGui_ImplVulkanH_XXX structures/functions are optional helpers used by the demo.
// Your real engine/app may not use them.
static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface, int width, int height)
{
    wd->Surface = surface;

    // Check for WSI support
    VkBool32 res;
    vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, wd->Surface, &res);
    if (res != VK_TRUE)
    {
        fprintf(stderr, "Error no WSI support on physical device 0\n");
        exit(-1);
    }

    // Select Surface Format
    const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM };
    const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
    wd->SurfaceFormat = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);

    // Select Present Mode
#ifdef IMGUI_UNLIMITED_FRAME_RATE
    VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_MAILBOX_KHR, VK_PRESENT_MODE_IMMEDIATE_KHR, VK_PRESENT_MODE_FIFO_KHR };
#else
    VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_FIFO_KHR };
#endif
    wd->PresentMode = ImGui_ImplVulkanH_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_modes[0], IM_ARRAYSIZE(present_modes));
    //printf("[vulkan] Selected PresentMode = %d\n", wd->PresentMode);

    // Create SwapChain, RenderPass, Framebuffer, etc.
    IM_ASSERT(g_MinImageCount >= 2);
    ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
}

static void CleanupVulkan()
{
    vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);

#ifdef IMGUI_VULKAN_DEBUG_REPORT
    // Remove the debug report callback
    auto vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT");
    vkDestroyDebugReportCallbackEXT(g_Instance, g_DebugReport, g_Allocator);
#endif // IMGUI_VULKAN_DEBUG_REPORT

    vkDestroyDevice(g_Device, g_Allocator);
    vkDestroyInstance(g_Instance, g_Allocator);
}

static void CleanupVulkanWindow()
{
    ImGui_ImplVulkanH_DestroyWindow(g_Instance, g_Device, &g_MainWindowData, g_Allocator);
}

static void FrameRender(ImGui_ImplVulkanH_Window* wd, ImDrawData* draw_data)
{
    VkResult err;

    VkSemaphore image_acquired_semaphore  = wd->FrameSemaphores[wd->SemaphoreIndex].ImageAcquiredSemaphore;
    VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
    err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
    if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
    {
        g_SwapChainRebuild = true;
        return;
    }
    check_vk_result(err);

    ImGui_ImplVulkanH_Frame* fd = &wd->Frames[wd->FrameIndex];
    {
        err = vkWaitForFences(g_Device, 1, &fd->Fence, VK_TRUE, UINT64_MAX);    // wait indefinitely instead of periodically checking
        check_vk_result(err);

        err = vkResetFences(g_Device, 1, &fd->Fence);
        check_vk_result(err);
    }
    {
        err = vkResetCommandPool(g_Device, fd->CommandPool, 0);
        check_vk_result(err);
        VkCommandBufferBeginInfo info = {};
        info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
        err = vkBeginCommandBuffer(fd->CommandBuffer, &info);
        check_vk_result(err);
    }
    {
        VkRenderPassBeginInfo info = {};
        info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
        info.renderPass = wd->RenderPass;
        info.framebuffer = fd->Framebuffer;
        info.renderArea.extent.width = wd->Width;
        info.renderArea.extent.height = wd->Height;
        info.clearValueCount = 1;
        info.pClearValues = &wd->ClearValue;
        vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
    }

    // Record dear imgui primitives into command buffer
    ImGui_ImplVulkan_RenderDrawData(draw_data, fd->CommandBuffer);

    // Submit command buffer
    vkCmdEndRenderPass(fd->CommandBuffer);
    {
        VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
        VkSubmitInfo info = {};
        info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        info.waitSemaphoreCount = 1;
        info.pWaitSemaphores = &image_acquired_semaphore;
        info.pWaitDstStageMask = &wait_stage;
        info.commandBufferCount = 1;
        info.pCommandBuffers = &fd->CommandBuffer;
        info.signalSemaphoreCount = 1;
        info.pSignalSemaphores = &render_complete_semaphore;

        err = vkEndCommandBuffer(fd->CommandBuffer);
        check_vk_result(err);
        err = vkQueueSubmit(g_Queue, 1, &info, fd->Fence);
        check_vk_result(err);
    }
}

static void FramePresent(ImGui_ImplVulkanH_Window* wd)
{
    if (g_SwapChainRebuild)
        return;
    VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
    VkPresentInfoKHR info = {};
    info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
    info.waitSemaphoreCount = 1;
    info.pWaitSemaphores = &render_complete_semaphore;
    info.swapchainCount = 1;
    info.pSwapchains = &wd->Swapchain;
    info.pImageIndices = &wd->FrameIndex;
    VkResult err = vkQueuePresentKHR(g_Queue, &info);
    if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
    {
        g_SwapChainRebuild = true;
        return;
    }
    check_vk_result(err);
    wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->ImageCount; // Now we can use the next set of semaphores
}

int main(int, char**)
{
    // Setup SDL
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
    {
        printf("Error: %s\n", SDL_GetError());
        return -1;
    }

    // Setup window
    SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
    SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);

    // Setup Vulkan
    uint32_t extensions_count = 0;
    SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, NULL);
    const char** extensions = new const char*[extensions_count];
    SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, extensions);
    SetupVulkan(extensions, extensions_count);
    delete[] extensions;

    // Create Window Surface
    VkSurfaceKHR surface;
    VkResult err;
    if (SDL_Vulkan_CreateSurface(window, g_Instance, &surface) == 0)
    {
        printf("Failed to create Vulkan surface.\n");
        return 1;
    }

    // Create Framebuffers
    int w, h;
    SDL_GetWindowSize(window, &w, &h);
    ImGui_ImplVulkanH_Window* wd = &g_MainWindowData;
    SetupVulkanWindow(wd, surface, w, h);

    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO(); (void)io;
    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls

    // Setup Dear ImGui style
    ImGui::StyleColorsDark();
    //ImGui::StyleColorsClassic();

    // Setup Platform/Renderer backends
    ImGui_ImplSDL2_InitForVulkan(window);
    ImGui_ImplVulkan_InitInfo init_info = {};
    init_info.Instance = g_Instance;
    init_info.PhysicalDevice = g_PhysicalDevice;
    init_info.Device = g_Device;
    init_info.QueueFamily = g_QueueFamily;
    init_info.Queue = g_Queue;
    init_info.PipelineCache = g_PipelineCache;
    init_info.DescriptorPool = g_DescriptorPool;
    init_info.Allocator = g_Allocator;
    init_info.MinImageCount = g_MinImageCount;
    init_info.ImageCount = wd->ImageCount;
    init_info.CheckVkResultFn = check_vk_result;
    ImGui_ImplVulkan_Init(&init_info, wd->RenderPass);

    // Load Fonts
    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
    // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
    // - Read 'docs/FONTS.md' for more instructions and details.
    // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
    //io.Fonts->AddFontDefault();
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
    //IM_ASSERT(font != NULL);

    // Upload Fonts
    {
        // Use any command queue
        VkCommandPool command_pool = wd->Frames[wd->FrameIndex].CommandPool;
        VkCommandBuffer command_buffer = wd->Frames[wd->FrameIndex].CommandBuffer;

        err = vkResetCommandPool(g_Device, command_pool, 0);
        check_vk_result(err);
        VkCommandBufferBeginInfo begin_info = {};
        begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        begin_info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
        err = vkBeginCommandBuffer(command_buffer, &begin_info);
        check_vk_result(err);

        ImGui_ImplVulkan_CreateFontsTexture(command_buffer);

        VkSubmitInfo end_info = {};
        end_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        end_info.commandBufferCount = 1;
        end_info.pCommandBuffers = &command_buffer;
        err = vkEndCommandBuffer(command_buffer);
        check_vk_result(err);
        err = vkQueueSubmit(g_Queue, 1, &end_info, VK_NULL_HANDLE);
        check_vk_result(err);

        err = vkDeviceWaitIdle(g_Device);
        check_vk_result(err);
        ImGui_ImplVulkan_DestroyFontUploadObjects();
    }

    // Our state
    bool show_demo_window = true;
    bool show_another_window = false;
    ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);

    // Main loop
    bool done = false;
    while (!done)
    {
        // Poll and handle events (inputs, window resize, etc.)
        // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
        // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
        // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
        // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
        SDL_Event event;
        while (SDL_PollEvent(&event))
        {
            ImGui_ImplSDL2_ProcessEvent(&event);
            if (event.type == SDL_QUIT)
                done = true;
            if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
                done = true;
        }

        // Resize swap chain?
        if (g_SwapChainRebuild)
        {
            int width, height;
            SDL_GetWindowSize(window, &width, &height);
            if (width > 0 && height > 0)
            {
                ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
                ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
                g_MainWindowData.FrameIndex = 0;
                g_SwapChainRebuild = false;
            }
        }

        // Start the Dear ImGui frame
        ImGui_ImplVulkan_NewFrame();
        ImGui_ImplSDL2_NewFrame(window);
        ImGui::NewFrame();
        /*
        ImGuiViewport* viewport = ImGui::GetMainViewport();
        ImGui::SetNextWindowPos(viewport->Pos);
        ImGui::SetNextWindowSize(viewport->Size);
        //ImGui::SetNextWindowViewport(viewport->ID);
        ImGui::SetNextWindowBgAlpha(0.0f);
        */

        //ImGui::Begin("main",nullptr, ImGuiWindowFlags_NoDecoration, ImGuiWindowFlags_NoBackground); //nope
        ImGuiWindowFlags flags = ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoSavedSettings;
        //ImGui::SetNextWindowBgAlpha(0.0f);
        ImGui::SetNextWindowPos(ImVec2(0, 32.0f));
        ImGui::Begin("main",nullptr, flags);
            
            if(ImGui::Button("my button") ){

            }
        ImGui::End();

        /*
        ImGui::Begin("main",nullptr, ImGuiWindowFlags_NoDecoration);
            if(ImGui::Button("my button") ){

            }
        ImGui::End();
        */

        if(ImGui::BeginMainMenuBar())
        {
            if (ImGui::BeginMenu("File"))
            {
                if(ImGui::MenuItem("New"))
                {
                //Do something
                }
                ImGui::EndMenu();
            }

            ImGui::EndMainMenuBar();
        }

        // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
        if (show_demo_window)
            ImGui::ShowDemoWindow(&show_demo_window);

        // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
        {
            static float f = 0.0f;
            static int counter = 0;

            ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.

            ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)
            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state
            ImGui::Checkbox("Another Window", &show_another_window);

            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f
            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color

            if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)
                counter++;
            ImGui::SameLine();
            ImGui::Text("counter = %d", counter);

            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
            ImGui::End();
        }

        // 3. Show another simple window.
        if (show_another_window)
        {
            ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
            ImGui::Text("Hello from another window!");
            if (ImGui::Button("Close Me"))
                show_another_window = false;
            ImGui::End();
        }

        // Rendering
        ImGui::Render();
        ImDrawData* draw_data = ImGui::GetDrawData();
        const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
        if (!is_minimized)
        {
            wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
            wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
            wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
            wd->ClearValue.color.float32[3] = clear_color.w;
            FrameRender(wd, draw_data);
            FramePresent(wd);
        }
    }

    // Cleanup
    err = vkDeviceWaitIdle(g_Device);
    check_vk_result(err);
    ImGui_ImplVulkan_Shutdown();
    ImGui_ImplSDL2_Shutdown();
    ImGui::DestroyContext();

    CleanupVulkanWindow();
    CleanupVulkan();

    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}