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