Static Libraries and ZERO Warnings

Christmas renders 2018 and 2021 by Mohamed Chahin

引言

也许是时候停下脚步，整理一下我们在引擎开发中遗留的各种警告与问题了。我们将引擎构建为静态库，并且清除所有警告！

由于目前的进度和各种警告问题，我们需要将引擎改为静态库，而不是像 DOOM 一样引擎作为 dll，游戏再链接到该 dll 上，在未来我们会尝试采取此模式。

预生成文件

在 VSCode 中打开所有预生成文件。

Infinite

workspace "Infinite"
  architecture "x64"
  startproject "Sandbox"

  configurations
  {
    "Debug",
    "Release",
    "Dist"
  }

outputdir = "%{cfg.buildcfg}-%{cfg.system}-%{cfg.architecture}"

-- Include directories relative to root folder (solution directory)
IncludeDir = {}
IncludeDir["GLFW"] = "Infinite/vendor/GLFW/include"
IncludeDir["GLAD"] = "Infinite/vendor/GLAD/include"
IncludeDir["ImGui"] = "Infinite/vendor/imgui"
IncludeDir["glm"] = "Infinite/vendor/glm"

include "Infinite/vendor/GLFW"
include "Infinite/vendor/GLAD"
include "Infinite/vendor/imgui"

project "Infinite"
  location "Infinite"
  kind "StaticLib"
  language "C++"
+ staticruntime "on"
+ cppdialect "C++17"

  targetdir ("bin/" .. outputdir .. "/%{prj.name}")
  objdir ("bin-int/" .. outputdir .. "/%{prj.name}")

  pchheader "ifnpch.h"
  pchsource "Infinite/src/ifnpch.cpp"

  files
  {
    "%{prj.name}/src/**.h",
    "%{prj.name}/src/**.cpp",
    "%{prj.name}/vendor/glm/glm/**.hpp",
    "%{prj.name}/vendor/glm/glm/**.inl"
  }

+ defines
+ {
+		"_CRT_SECURE_NO_WARNINGS"
+ }


  includedirs
  {
    "%{prj.name}/src",
    "%{prj.name}/vendor/spdlog/include",
    "%{IncludeDir.GLFW}",
    "%{IncludeDir.GLAD}",
    "%{IncludeDir.ImGui}",
    "%{IncludeDir.glm}"
  }

  links
  {
    "GLFW",
    "GLAD",
    "ImGui",
    "opengl32.lib"
  }

  filter "system:windows"
    systemversion "latest"

    defines
    {
      "IFN_PLATFORM_WINDOWS",
      "IFN_BUILD_DLL",
      "GLFW_INCLUDE_NONE"
    }

  filter "configurations:Debug"
      defines "IFN_DEBUG"
      runtime "Debug"
+     symbols "on"

  filter "configurations:Release"
      defines "IFN_RELEASE"
      runtime "Release"
+     optimize "on"

  filter "configurations:Dist"
      defines "IFN_DIST"
      runtime "Release"
+     optimize "on"



project "Sandbox"
  location "Sandbox"
  kind "ConsoleApp"
  language "C++"
+ cppdialect "C++17"
+ staticruntime "on"



  targetdir ("bin/" .. outputdir .. "/%{prj.name}")
  objdir ("bin-int/" .. outputdir .. "/%{prj.name}")

  files
  {
    "%{prj.name}/src/**.h",
    "%{prj.name}/src/**.cpp"
  }

  includedirs
  {
    "Infinite/vendor/spdlog/include",
    "Infinite/src/Infinite",
    "Infinite/src/Events",
    "Infinite/src/**.h",
    "Infinite/src/**.cpp",
    "Infinite/vendor/imgui",
    "%{IncludeDir.glm}"
  }

  links
  {
    "Infinite"
  }

  filter "system:windows"
    systemversion "latest"

    defines
    {
      "IFN_PLATFORM_WINDOWS"
    }

  filter "configurations:Debug"
      defines "IFN_DEBUG"
      runtime "Debug"
+     symbols "on"

  filter "configurations:Release"
      defines "IFN_RELEASE"
      runtime "Release"
+     optimize "on"

  filter "configurations:Dist"
      defines "IFN_DIST"
      runtime "Release"
+     optimize "on"

将引擎的预生成文件转化为 .lib 静态库。

ImGUI

之前出现的错误是由于我擅自修改了 imgui 的预生成文件：

project "ImGui"
	kind "StaticLib"
	language "C++"
  staticruntime "on"

	targetdir ("bin/" .. outputdir .. "/%{prj.name}")
	objdir ("bin-int/" .. outputdir .. "/%{prj.name}")

	files
	{
		"imconfig.h",
		"imgui.h",
		"imgui.cpp",
		"imgui_draw.cpp",
		"imgui_internal.h",
		"imgui_tables.cpp",
		"imgui_widgets.cpp",
		"imstb_rectpack.h",
		"imstb_textedit.h",
		"imstb_truetype.h",
		"imgui_demo.cpp"
	}

	filter "system:windows"
			systemversion "latest"
			cppdialect "C++17"
			staticruntime "On"

	filter { "system:windows", "configurations:Release" }
			buildoptions "/MT"

GLAD

project "GLAD"
	kind "StaticLib"
	language "C"
	staticruntime "on"

	targetdir ("bin/" .. outputdir .. "/%{prj.name}")
	objdir ("bin-int/" .. outputdir .. "/%{prj.name}")

	files
	{
		"include/glad/glad.h",
		"include/KHR/khrplatform.h",
		"src/glad.c"
	}

	includedirs
	{
		"include"
	}

	filter "system:windows"
		systemversion "latest"

	filter "configurations:Debug"
        runtime "Debug"
        symbols "on"

    filter "configurations:Release"
        runtime "Release"
        optimize "on"

类型转换

ImGuiLayer.cpp 还有一个类型转换的问题：

	void ImGuiLayer::End()
	{
		ImGuiIO& io = ImGui::GetIO();

		Application& app = Application::Get();
+		io.DisplaySize = ImVec2((float)app.GetWindow().GetWidth(), (float)app.GetWindow().GetHeight());

		// Rendering
		ImGui::Render();
		ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

		if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
		{
			GLFWwindow* backup_current_context = glfwGetCurrentContext();
			ImGui::UpdatePlatformWindows();
			ImGui::RenderPlatformWindowsDefault();
			glfwMakeContextCurrent(backup_current_context);
		}
	}

调试

零报错零警告，引擎正常运行！