修改底层渲染为OpenGL

source/EngineFrame/Render/RenderManager.h

@@ -0,0 +1,78 @@
+#pragma once
+#include <SDL.h>
+#include <SDL_image.h>
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+#include <glm/ext/matrix_clip_space.hpp>
+#include <glm/gtc/type_ptr.hpp>
+#include <map>
+#include <string>
+#include <json.hpp>
+#include "EngineFrame/Render/Texture.h"
+class RenderManager
+{
+public:
+    // 绘制纹理的逻辑函数
+    using DrawLogicFunc = std::function<void(RefPtr<Texture>, const SDL_Rect *, const SDL_FRect *,
+                                             double, const SDL_FPoint *, SDL_RendererFlip,
+                                             void *)>;
+
+    struct GL_RenderParams
+    {
+        GLuint VAO;
+        GLuint VBO;
+        GLuint EBO;
+        std::vector<GLuint> UnimLocs;
+        DrawLogicFunc DrawFunc = nullptr;
+    };
+
+private:
+    SDL_Window *_window;
+    // 窗口尺寸
+    int _windowWidth;
+    int _windowHeight;
+    // 正交投影矩阵
+    glm::mat4 _orthoMatrix;
+
+    // 渲染器上下文
+    SDL_GLContext _ctx;
+    // 着色器程序
+    std::map<std::string, GLuint> _shaderProgramMap;
+    // 渲染参数
+    std::map<std::string, GL_RenderParams> _RenderParamsMap;
+
+    // 当前使用着色器程序
+    GLuint _currentShaderProgram;
+    // 当前使用渲染参数
+    GL_RenderParams _currentRenderParams;
+
+public:
+    RenderManager(SDL_Window *window);
+    ~RenderManager();
+
+    // 初始化着色器程序
+    void InitShaderProgram();
+    // 初始化绘制2D纹理缓冲程序
+    void Init2DTextureProgram();
+    // 设定当前使用的着色器程序
+    void SetCurrentShaderProgram(std::string name);
+    // 设定当前使用的缓冲对象
+    void SetCurrentBufferObject(std::string name);
+
+    // 清空屏幕
+    void ClearScreen();
+    // 交换缓冲区
+    void SwapBuffer();
+    // 设置裁切区域
+    void SetClipRect(const SDL_Rect *rect);
+    // 关闭裁切区域
+    void CloseClipRect();
+    // 绘制纹理
+    void DrawTexture(RefPtr<Texture> texture, const SDL_Rect *srcrect, const SDL_FRect *dstrect, const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip, void *userdata = nullptr);
+
+private:
+    // 编译着色器
+    GLuint CompileShader(GLenum type, std::string Path);
+    // 新增缓冲程序
+    void AddBufferObject(std::string name, GL_RenderParams bufferObject);
+};