From a00d3bba0658f5502d452bdb84dd65bc779d3d42 Mon Sep 17 00:00:00 2001
From: ouczbs <ouczbs@qq.com>
Date: Sat, 6 Jul 2024 18:04:51 +0800
Subject: [PATCH] support opengl

---
 .gitignore                                    |  1 +
 engine/3rdparty/xmake.lua                     |  2 +-
 engine/3rdparty/zlib/include/refl/macro.h     |  5 ++
 engine/3rdparty/zlib/test/yaml/guid.h         |  1 -
 engine/src/engine/app.cpp                     |  6 +-
 engine/src/engine/app.h                       |  2 +-
 .../openglapi/loader/opengl_glsl_loader.cpp   |  1 +
 engine/src/engine/openglapi/openglapi.cpp     | 61 ++++++++++++++++++-
 engine/src/engine/openglapi/openglapi.h       | 12 +++-
 engine/src/engine/openglapi/window.cpp        |  4 --
 engine/src/engine/render/asset/vertex.h       |  4 ++
 engine/src/engine/render/renderapi.h          |  1 +
 engine/src/engine/render/window.cpp           | 22 +++++--
 engine/src/engine/render/window.h             |  2 +
 engine/src/engine/vulkanapi/vulkanapi.cpp     |  4 ++
 engine/src/engine/vulkanapi/vulkanapi.h       |  1 +
 engine/src/main.cpp                           |  3 +-
 engine/xmake.lua                              |  2 +-
 engine/xmake/gen/meta_refl.lua                |  5 ++
 19 files changed, 119 insertions(+), 20 deletions(-)

diff --git a/.gitignore b/.gitignore
index 0f28dcb..f8cffef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ vsxmake*/
 
 engine/logs/zengine.log
 tools/
+cpp_input.h
diff --git a/engine/3rdparty/xmake.lua b/engine/3rdparty/xmake.lua
index f8008b6..eb80a33 100644
--- a/engine/3rdparty/xmake.lua
+++ b/engine/3rdparty/xmake.lua
@@ -8,4 +8,4 @@ local utils = {
     "spirv-cross-glsl","spirv-cross-cpp", "spirv-cross-core", "spirv-cross-reflect","spirv-cross-util"
 }
 add_requires("vulkansdk",{configs = {utils = utils}})
-add_requires("opengl", "opencl-headers")
+add_requires("glew")
diff --git a/engine/3rdparty/zlib/include/refl/macro.h b/engine/3rdparty/zlib/include/refl/macro.h
index f62a2f1..e5939a9 100644
--- a/engine/3rdparty/zlib/include/refl/macro.h
+++ b/engine/3rdparty/zlib/include/refl/macro.h
@@ -19,6 +19,10 @@ namespace engineapi {
 #define UPROPERTY_dx(...) __dxMeta(__VA_ARGS__)
 #define UFUNCTION_dx(...) __dxMeta(__VA_ARGS__)
 
+#define __glMeta(...) __cppast(glMeta=__VA_ARGS__)
+#define UPROPERTY_gl(...) __glMeta(__VA_ARGS__)
+#define UFUNCTION_gl(...) __glMeta(__VA_ARGS__)
+
 // 辅助宏，用于实际拼接
 #define CONCATENATE(arg1, arg2)   CONCATENATE_IMPL(arg1, arg2)
 #define CONCATENATE_IMPL(arg1, arg2)  arg1##arg2
@@ -46,4 +50,5 @@ namespace refl_impl {
 	struct Meta {};
 	struct vkMeta {};
 	struct dxMeta {};
+	struct glMeta {};
 }
\ No newline at end of file
diff --git a/engine/3rdparty/zlib/test/yaml/guid.h b/engine/3rdparty/zlib/test/yaml/guid.h
index 95871b6..1f36686 100644
--- a/engine/3rdparty/zlib/test/yaml/guid.h
+++ b/engine/3rdparty/zlib/test/yaml/guid.h
@@ -6,7 +6,6 @@ using std::string;
 using std::vector;
 struct Guid
 {
-	using MyMeta = class Guid_Meta;
 	UPROPERTY({1})
 	unsigned int   Data1;
 	UPROPERTY({})
diff --git a/engine/src/engine/app.cpp b/engine/src/engine/app.cpp
index a019eb1..523c24d 100644
--- a/engine/src/engine/app.cpp
+++ b/engine/src/engine/app.cpp
@@ -38,13 +38,15 @@ namespace engineapi {
 			system->Shutdown();
 		}
 	}
-	void App::Launch()
+	int App::Launch()
 	{
 		Init();
-		while (Loop) {
+		int code = 0;
+		while (Loop && Window::ProcessMessages(code)) {
 			Update();
 			Render();
 		}
+		return code;
 	}
 	void App::Update()
 	{
diff --git a/engine/src/engine/app.h b/engine/src/engine/app.h
index cf2bec3..0547198 100644
--- a/engine/src/engine/app.h
+++ b/engine/src/engine/app.h
@@ -16,7 +16,7 @@ namespace engineapi
 	public:
 		void Init();
 		void Shutdown();
-		void Launch();
+		int Launch();
 		void Update();
 		void Render();
 	};
diff --git a/engine/src/engine/openglapi/loader/opengl_glsl_loader.cpp b/engine/src/engine/openglapi/loader/opengl_glsl_loader.cpp
index b454ce2..0a711f7 100644
--- a/engine/src/engine/openglapi/loader/opengl_glsl_loader.cpp
+++ b/engine/src/engine/openglapi/loader/opengl_glsl_loader.cpp
@@ -9,6 +9,7 @@ namespace openglapi {
 	}
 	ResourceBundle OpenGLGlslLoader::LoadFile(PackagePath path, const MetaBundle& meta)
 	{
+
 		return {};
 	}
 }
diff --git a/engine/src/engine/openglapi/openglapi.cpp b/engine/src/engine/openglapi/openglapi.cpp
index deeeec2..66f2b5e 100644
--- a/engine/src/engine/openglapi/openglapi.cpp
+++ b/engine/src/engine/openglapi/openglapi.cpp
@@ -1,17 +1,38 @@
 #include "openglapi.h"
 #include "window.h"
+#include "zlog.h"
+#include "GL/glew.h"
 #include "loader/opengl_glsl_loader.h"
+#include "render/asset/mesh.h"
+struct glVertexMeta {
+	GLint size;
+	GLenum type;
+	GLboolean normalized;
+};
+#include "glmeta_vertex_gen.inl"
 namespace openglapi {
 	void RenderOpenGLApi::SwitchContext()
 	{
 	}
 	void RenderOpenGLApi::Init()
 	{
+		if (glewInit() != GLEW_OK) {
+			// 处理初始化错误
+			zlog::error("GLEW Initialization failed!");
+		}
+		RenderAPI::Init();
 		OpenGLGlslLoader::Init();
+		window = OpenGLWindow::GetSingletonPtr();
 	}
 	void RenderOpenGLApi::InitRenderPass()
 	{
 	}
+	void RenderOpenGLApi::OnWindowSizeChange(uint32_t width, uint32_t height)
+	{
+		// 设置视口和背景颜色
+		glViewport(0, 0, width, height);
+		glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+	}
 	void RenderOpenGLApi::SetViewPort(uint32_t width, uint32_t height, uint32_t xOffset, uint32_t yOffset)
 	{
 		mViewPortInfo.width = width;
@@ -33,10 +54,48 @@ namespace openglapi {
 	void RenderOpenGLApi::EndFrame()
 	{
 		glEnd();
-		OpenGLWindow::GetSingletonPtr()->Present();
+		window->Present();
 	}
 	void RenderOpenGLApi::SetStaticMesh(Mesh& mesh)
 	{
+		auto Indices = mesh.GetIndices();
+		auto Vertices = mesh.GetVertices();
+		unsigned int VBO, VAO, EBO;
+		glGenVertexArrays(1, &VAO);
+		glGenBuffers(1, &VBO);
+		glGenBuffers(1, &EBO);
+
+		// 绑定顶点数组对象
+		glBindVertexArray(VAO);
+
+		// 绑定顶点缓冲对象
+		glBindBuffer(GL_ARRAY_BUFFER, VBO);
+		glBufferData(GL_ARRAY_BUFFER, Vertices.size(), Vertices.data(), GL_STATIC_DRAW);
+
+		// 绑定索引缓冲对象
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER, Indices.size(), Indices.data(), GL_STATIC_DRAW);
+
+		auto meta = Vertices.uclass()->vtable.GetMeta("glMeta");
+		{
+			uint32_t count = 0;
+			uint32_t size = meta->size;
+			for (auto& field : meta->GetFields(refl::FIND_ALL_MEMBER, FName(""))) {
+				// 设置顶点属性指针
+				refl::Any field_meta = field.GetMeta();
+				if (!field_meta) continue;
+				glVertexMeta v_meta = field_meta.CastTo<glVertexMeta>();
+				GLvoid* offset  = reinterpret_cast<GLvoid*>(field.GetOffset());
+				glEnableVertexAttribArray(count);
+				glVertexAttribPointer(count, v_meta.size, v_meta.type, v_meta.normalized, size, offset);
+				count++;
+			}
+		}
+		// 解绑VBO（不是EBO！）
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+		// 解绑VAO
+		glBindVertexArray(0);
+		VAOTable[mesh.GetGuid()] = VAO;
 	}
 	void RenderOpenGLApi::DrawStaticMesh(Mesh& mesh)
 	{
diff --git a/engine/src/engine/openglapi/openglapi.h b/engine/src/engine/openglapi/openglapi.h
index 15bf900..42610ae 100644
--- a/engine/src/engine/openglapi/openglapi.h
+++ b/engine/src/engine/openglapi/openglapi.h
@@ -1,13 +1,22 @@
 #pragma once
 #include "render/renderapi.h"
+#include "zstd/table.h"
 #include "asset/render/asset_struct.h"
-#include "gl/GL.h"
 namespace openglapi {
 	using engineapi::RenderContext;
 	using engineapi::Mesh;
 	using engineapi::Shader;
+	using engineapi::Guid;
+	using zstd::hash_table;
+	class OpenGLWindow;
+	struct OpenGLVAO {
+		int VAO;
+	};
 	class RenderOpenGLApi : public engineapi::RenderAPI {
+	public:
 		RenderContext context;
+		OpenGLWindow* window;
+		hash_table<Guid, OpenGLVAO> VAOTable;
 	public:
 		RenderContext* GetContext() override {
 			return &context;
@@ -18,6 +27,7 @@ namespace openglapi {
 		void Init() override;
 		void InitRenderPass()override;
 	public:
+		void OnWindowSizeChange(uint32_t width, uint32_t height) override;
 		void SetViewPort(uint32_t width, uint32_t height, uint32_t xOffset = 0, uint32_t yOffset = 0)override;
 
 		void BeginFrame()override;
diff --git a/engine/src/engine/openglapi/window.cpp b/engine/src/engine/openglapi/window.cpp
index 3e187f4..341a6b4 100644
--- a/engine/src/engine/openglapi/window.cpp
+++ b/engine/src/engine/openglapi/window.cpp
@@ -1,5 +1,4 @@
 #include "window.h"
-#include <gl/GL.h>
 namespace openglapi {
 	void OpenGLWindow::SetupOpenGLContext()
 	{
@@ -36,9 +35,6 @@ namespace openglapi {
 		:engineapi::Window(width, height, title)
 	{
         SetupOpenGLContext();
-        // 设置视口和背景颜色
-        glViewport(0, 0, width, height);
-        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 	}
     void OpenGLWindow::Present()
     {
diff --git a/engine/src/engine/render/asset/vertex.h b/engine/src/engine/render/asset/vertex.h
index 6b8ea6f..3565020 100644
--- a/engine/src/engine/render/asset/vertex.h
+++ b/engine/src/engine/render/asset/vertex.h
@@ -20,12 +20,16 @@ namespace engineapi {
 	};
 	struct BoneVertex : public Vertex
 	{
+		UPROPERTY_gl({}, glVertexMeta{ 3, GL_FLOAT, GL_FALSE })
 		UPROPERTY_vk({}, uint32_t{ VK_FORMAT_R32G32B32_SFLOAT })
 		Vector3 Position = {};
+		UPROPERTY_gl({}, glVertexMeta{ 2, GL_FLOAT, GL_FALSE })
 		UPROPERTY_vk()
 		Vector2 TexCoords = {};
+		UPROPERTY_gl({}, glVertexMeta{ 3, GL_FLOAT, GL_FALSE })
 		UPROPERTY_vk()
 		Vector3 Normal = {};
+		UPROPERTY_gl({}, glVertexMeta{ 3, GL_FLOAT, GL_FALSE })
 		UPROPERTY_vk()
 		Vector3 Tangent = {};
 		// 骨骼蒙皮数据
diff --git a/engine/src/engine/render/renderapi.h b/engine/src/engine/render/renderapi.h
index 045e020..bebe3b0 100644
--- a/engine/src/engine/render/renderapi.h
+++ b/engine/src/engine/render/renderapi.h
@@ -27,6 +27,7 @@ namespace engineapi
 	public:
 		virtual RenderContext* GetContext() = 0;
 	public:
+		virtual void OnWindowSizeChange(uint32_t width, uint32_t height) = 0;
 		virtual void SetViewPort(uint32_t width, uint32_t height, uint32_t xOffset = 0, uint32_t yOffset = 0) = 0;
 		virtual void BeginFrame() = 0;
 		virtual void Render(Camera& camera);
diff --git a/engine/src/engine/render/window.cpp b/engine/src/engine/render/window.cpp
index ffe21a3..1fda7ba 100644
--- a/engine/src/engine/render/window.cpp
+++ b/engine/src/engine/render/window.cpp
@@ -1,4 +1,5 @@
 #include "window.h"
+#include "renderapi.h"
 #include "data/engine_setting.h"
 #ifdef VULKAN_API
 #include "vulkanapi/window.h"
@@ -51,12 +52,16 @@ namespace engineapi {
 		AdjustWindowRectEx(&wr, dwStyle, FALSE, dwExStyle);
 		mPtr = CreateWindow(
 			WindowClass::GetName(), title,
-			WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU,
+			WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU | WS_OVERLAPPEDWINDOW,
 			CW_USEDEFAULT, CW_USEDEFAULT, wr.right - wr.left, wr.bottom - wr.top,
 			nullptr, nullptr, WindowClass::GetInstance(), this
 		);
 		ShowWindow(mPtr, SW_SHOW);
 	}
+	void Window::OnResize(uint32_t width, uint32_t height)
+	{
+		RenderAPI::GetSingletonPtr()->OnWindowSizeChange(width, height);
+	}
 	bool Window::ProcessMessages(int& code)
 	{
 		MSG msg;
@@ -68,14 +73,14 @@ namespace engineapi {
 			{
 				// return optional wrapping int (arg to PostQuitMessage is in wparam) signals quit
 				code = (int)msg.wParam;
-				return true;
+				return false;
 			}
 
 			// TranslateMessage will post auxilliary WM_CHAR messages from key msgs
 			TranslateMessage(&msg);
 			DispatchMessage(&msg);
 		}
-		return false;
+		return true;
 	}
 	LRESULT CALLBACK Window::HandleMsgSetup(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) noexcept
 	{
@@ -108,10 +113,15 @@ namespace engineapi {
 	{
 		switch (msg)
 		{
-			// we don't want the DefProc to handle this message because
-			// we want our destructor to destroy the window, so return 0 instead of break
+		case WM_SIZE:
+		{
+			uint32_t width = LOWORD(lParam);
+			uint32_t height = HIWORD(lParam);
+			OnResize(width, height);
+			break;
+		}
 		case WM_CLOSE:
-			PostQuitMessage(0);
+			PostQuitMessage(-1);
 			return 0;
 			// clear keystate when window loses focus to prevent input getting "stuck"
 		/************** END MOUSE MESSAGES **************/
diff --git a/engine/src/engine/render/window.h b/engine/src/engine/render/window.h
index 6e1510d..772a7c3 100644
--- a/engine/src/engine/render/window.h
+++ b/engine/src/engine/render/window.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <Windows.h>
 #include <cstdint>
+#include <optional>
 #include "singleton.h"
 namespace engineapi {
 	class Window : public ISingleton<Window> {
@@ -37,6 +38,7 @@ namespace engineapi {
 		HWND Ptr() {
 			return mPtr;
 		}
+		void OnResize(uint32_t width, uint32_t height);
 		void GetSize(uint32_t& width, uint32_t& height) {
 			width = mWidth;
 			height = mHeight;
diff --git a/engine/src/engine/vulkanapi/vulkanapi.cpp b/engine/src/engine/vulkanapi/vulkanapi.cpp
index c852731..39522ee 100644
--- a/engine/src/engine/vulkanapi/vulkanapi.cpp
+++ b/engine/src/engine/vulkanapi/vulkanapi.cpp
@@ -48,6 +48,10 @@ namespace vulkanapi {
 				PassList[type] = ForwardPass::MakePass(backend.GetDevice(), gbuffer, output);
 			}
 		}
+	}
+	void RenderVulkanAPI::OnWindowSizeChange(uint32_t width, uint32_t height)
+	{
+
 	}
 	void RenderVulkanAPI::SetViewPort(uint32_t width, uint32_t height, uint32_t xOffset, uint32_t yOffset)
 	{
diff --git a/engine/src/engine/vulkanapi/vulkanapi.h b/engine/src/engine/vulkanapi/vulkanapi.h
index e4a1ef1..feae040 100644
--- a/engine/src/engine/vulkanapi/vulkanapi.h
+++ b/engine/src/engine/vulkanapi/vulkanapi.h
@@ -33,6 +33,7 @@ namespace vulkanapi
 		void Init() override;
 		void InitRenderPass()override;
 	public:
+		void OnWindowSizeChange(uint32_t width, uint32_t height) override;
 		void SetViewPort(uint32_t width, uint32_t height, uint32_t xOffset = 0, uint32_t yOffset = 0)override;
 
 		void BeginFrame()override;
diff --git a/engine/src/main.cpp b/engine/src/main.cpp
index 77ccd0f..2a6b716 100644
--- a/engine/src/main.cpp
+++ b/engine/src/main.cpp
@@ -7,6 +7,5 @@ int main(int argc, char** argv)
 {
     const char* name = "zengine";
     App game(name);
-    game.Launch();
-    return 0;
+    return game.Launch();
 }
diff --git a/engine/xmake.lua b/engine/xmake.lua
index e441487..81c896e 100644
--- a/engine/xmake.lua
+++ b/engine/xmake.lua
@@ -14,7 +14,7 @@ target("zengine")
     add_deps("zlog","zlib")
     add_defines("VULKAN_API", "OPENGL_API")
     add_packages("vulkansdk","tinyobjloader","assimp","nlohmann_json")
-    add_packages("opencl", "opencl-headers")
+    add_packages("glew")
     add_includedirs("src/engine")
     add_includedirs("src/3rdparty/volk", "src/3rdparty/vulkan-memory-allocator", "src/3rdparty/template")
     add_syslinks("user32", "Ole32", "Gdi32","Opengl32")
diff --git a/engine/xmake/gen/meta_refl.lua b/engine/xmake/gen/meta_refl.lua
index 2e4a65f..bcf8a79 100644
--- a/engine/xmake/gen/meta_refl.lua
+++ b/engine/xmake/gen/meta_refl.lua
@@ -1,5 +1,9 @@
 import("core.project.depend")
+local genList = {}
 function cmd_compile(genfile, sourcefile, template, macro, define)
+    if genList[genfile] then 
+        return 
+    end
     import("find_sdk")
     local meta = find_sdk.find_my_program("refl")
     template = template or path.join(meta.sdkdir, "template")
@@ -14,6 +18,7 @@ function cmd_compile(genfile, sourcefile, template, macro, define)
         table.insert(argv, "-d")
         table.insert(argv, define)
     end
+    genList[genfile] = true
     print("cmd_meta_compile", genfile)
     os.execv(meta.program, argv)
     return argv