165 lines
6.7 KiB
C++
165 lines
6.7 KiB
C++
#ifndef HGL_GRAPH_BUFFER_OBJECT_INCLUDE
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#define HGL_GRAPH_BUFFER_OBJECT_INCLUDE
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#include<hgl/graph/BufferData.h>
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namespace hgl
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{
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namespace graph
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{
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/**
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* 显存数据缓冲区对象<br>
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* 负责对象与API的交接
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*/
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class BufferObject
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{
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protected:
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GLuint buffer_index; ///<缓冲区索引
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GLenum buffer_type; ///<缓冲区类型(GL_ARRAY_BUFFER,GL_ELEMENT_ARRAY_BUFFER等)
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GLenum user_pattern; ///<数据存储区使用模式(GL_STATIC_DRAW,GL_DYNAMIC_DRAW等)
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GLsizeiptr buffer_bytes;
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const BufferData *buffer_data;
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public:
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BufferObject(GLenum type);
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virtual ~BufferObject();
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public:
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GLuint GetBufferIndex ()const {return buffer_index;} ///<取得OpenGL缓冲区
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GLenum GetBufferType ()const {return buffer_type;} ///<取得缓冲区类型
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GLenum GetUserPattern ()const {return user_pattern;} ///<取得缓冲区使用方法
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const BufferData *GetBufferData ()const {return buffer_data;} ///<取得缓冲数区(这里返回const是为了不想让只有BufferObject的模块可以修改数据)
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const GLsizeiptr GetBufferSize ()const {return buffer_bytes;} ///<取得缓冲区总计字数
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public:
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bool Create (GLsizeiptr); ///<创建数据区
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bool Submit (void *,GLsizeiptr,GLenum up=GL_STATIC_DRAW); ///<提交数据
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bool Submit (const BufferData *,GLenum up=GL_STATIC_DRAW); ///<提交数据
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bool Change (void *,GLsizeiptr,GLsizeiptr); ///<修改数据
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};//class BufferObject
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/**
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* 显存顶点属性数据缓冲区对象
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*/
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class VertexBufferObject:public BufferObject
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{
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public:
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using BufferObject::BufferObject;
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~VertexBufferObject()=default;
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const VertexBufferData *GetVertexBufferData()const{return (const VertexBufferData *)buffer_data;}
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#define VBD_FUNC_COPY(type,name) type Get##name()const{return buffer_data?((const VertexBufferData *)buffer_data)->Get##name():0;}
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VBD_FUNC_COPY(GLenum,DataType)
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VBD_FUNC_COPY(uint,Component)
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VBD_FUNC_COPY(uint,Stride)
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VBD_FUNC_COPY(GLsizeiptr,Count)
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#undef VBD_FUNC_COPY
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};//class VertexBufferObject:public BufferObject
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/**
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* 创建一个缓冲区对象
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* @param buf_type 缓冲区类型(GL_ARRAY_BUFFER,GL_ELEMENT_ARRAY_BUFFER等)
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* @param user_pattern 数据存储区使用模式(GL_STATIC_DRAW,GL_DYNAMIC_DRAW等)
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* @param buf 数据缓冲区
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*/
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template<typename BO,typename BD>
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inline BO *_CreateBufferObject(BD *buf=nullptr,const GLenum &user_pattern=GL_STATIC_DRAW)
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{
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BO *obj=new BO();
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if(buf)
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obj->Submit(buf,user_pattern);
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return(obj);
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}
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///**
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// * 创建一个缓冲区对象
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// * @param buf_type 缓冲区类型(GL_ARRAY_BUFFER,GL_ELEMENT_ARRAY_BUFFER等)
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// * @param user_pattern 数据存储区使用模式(GL_STATIC_DRAW,GL_DYNAMIC_DRAW等)
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// * @param total_bytes 数据总字节数
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// */
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//template<typename BO>
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//inline BO *_CreateBufferObject(const GLenum &buf_type,const GLenum &user_pattern,const GLsizeiptr &total_bytes)
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//{
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// if(total_bytes<=0)return(nullptr);
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// BO *buf=new BO(buf_type);
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// //if(buf->Create(total_bytes,user_pattern))
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// // return buf;
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// delete buf;
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// return(nullptr);
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//}
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/**
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* 创建一个缓冲区对象
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* @param buf_type 缓冲区类型(GL_ARRAY_BUFFER,GL_ELEMENT_ARRAY_BUFFER等)
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* @param user_pattern 数据存储区使用模式(GL_STATIC_DRAW,GL_DYNAMIC_DRAW等)
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* @param total_bytes 数据总字节数
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* @param data 数据指针
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*/
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template<typename BO>
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inline BO *_CreateBufferObject(void *data,const GLsizeiptr &total_bytes,const GLenum &user_pattern=GL_STATIC_DRAW)
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{
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if(total_bytes<=0)return(nullptr);
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if(!data)return(nullptr);
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BO *buf=new BO();
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//if(buf->Create(total_bytes,user_pattern))
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// return buf;
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if(buf->Submit(data,total_bytes,user_pattern))
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return buf;
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delete buf;
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return(nullptr);
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}
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#define VBCLASS_DEF(buffer_gl_type,buffer_class_name,BASE,data_name,short_name) \
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class buffer_class_name:public BASE \
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{ \
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public: \
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\
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buffer_class_name():BASE(buffer_gl_type){} \
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~buffer_class_name()=default; \
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}; \
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\
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inline buffer_class_name *Create##short_name() \
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{ \
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return(new buffer_class_name()); \
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}; \
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\
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inline buffer_class_name *Create##short_name(data_name *buf=nullptr,const GLenum user_pattern=GL_STATIC_DRAW) \
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{ \
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return _CreateBufferObject<buffer_class_name,data_name>(buf,user_pattern); \
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}; \
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\
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inline buffer_class_name *Create##short_name(void *data,const GLsizeiptr &size,const GLenum &user_pattern=GL_STATIC_DRAW) \
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{ \
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return _CreateBufferObject<buffer_class_name>(data,size,user_pattern); \
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}
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//ps.在这里用宏了再用模板本是多此一举，但使用模板函数易于调试器中进行逐行调试，同时因为INLINE编译编译器也会自动展开代码，不用担心效率
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VBCLASS_DEF(GL_ARRAY_BUFFER, ArrayBuffer, VertexBufferObject, VertexBufferData, VBO)
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VBCLASS_DEF(GL_ELEMENT_ARRAY_BUFFER, ElementBuffer, VertexBufferObject, VertexBufferData, EBO)
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VBCLASS_DEF(GL_UNIFORM_BUFFER, UniformBuffer, BufferObject, BufferData, UBO)
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VBCLASS_DEF(GL_SHADER_STORAGE_BUFFER, ShaderStorageBuffer,BufferObject, BufferData, SSBO)
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#undef VBCLASS_DEF
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}//namespace graph
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}//namespace hgl
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#endif//HGL_GRAPH_BUFFER_OBJECT_INCLUDE
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