84 lines
3.8 KiB
C
84 lines
3.8 KiB
C
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#ifndef HGL_GRAPH_BUFFER_DATA_INCLUDE
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#define HGL_GRAPH_BUFFER_DATA_INCLUDE
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#include<GLEWCore/glew.h>
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#include<hgl/type/DataType.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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* 缓冲区数据管理类
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*/
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class BufferData
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{
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protected:
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GLenum data_type; ///<单个数据类型 (GL_BYTE,GL_UNSIGNED_SHORT,GL_FLOAT等)
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uint data_bytes; ///<单个数据字节数 (GL_BYTE为1,GL_UNSIGNED_SHORT为2,GL_FLOAT为4等)
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uint data_comp; ///<数据成员数 (1/2/3/4，如2D纹理坐标用2，3D坐标/法线用3)
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uint data_stride; ///<每组数据字节数
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GLsizeiptr data_count; ///<数据数量
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GLsizeiptr total_bytes; ///<数据总字节数
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char * buffer_data;
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protected:
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friend BufferData *CreateBufferData(void *data,const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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BufferData(const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count,char *data)
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{
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data_type =dt;
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data_bytes =dbytes;
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data_comp =dcm;
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data_stride =data_comp*data_bytes;
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data_count =count;
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total_bytes =data_stride*data_count;
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buffer_data =data;
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}
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public:
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virtual ~BufferData()=default;
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GLenum GetDataType ()const {return data_type;} ///<取得数据类型
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uint GetComponent ()const {return data_comp;} ///<取数每一组数据中的数据数量
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uint GetStride ()const {return data_stride;} ///<取得每一组数据字节数
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GLsizeiptr GetCount ()const {return data_count;} ///<取得数据数量
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GLsizeiptr GetTotalBytes ()const {return total_bytes;} ///<取得数据总字节数
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public:
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void * GetData ()const {return buffer_data;} ///<取得数据指针
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};//class BufferData
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/**
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* 创建一个数据缓冲区<br>
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* 这种方式创建的缓冲区，它会自行分配内存，最终释放
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* @param dt 单个数据类型 (GL_BYTE,GL_UNSIGNED_SHORT,GL_FLOAT等)
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* @param dbytes 单个数据字节数 (GL_BYTE为1,GL_UNSIGNED_SHORT为2,GL_FLOAT为4等)
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* @param dcm 数据成员数 (1/2/3/4，如2D纹理坐标用2，3D坐标/法线用3)
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* @param count 数据数量
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*/
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BufferData *CreateBufferData(const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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/**
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* 创建一个数据缓冲区
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* @param data 数据指针
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* @param dt 单个数据类型 (GL_BYTE,GL_UNSIGNED_SHORT,GL_FLOAT等)
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* @param dbytes 单个数据字节数 (GL_BYTE为1,GL_UNSIGNED_SHORT为2,GL_FLOAT为4等)
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* @param dcm 数据成员数 (1/2/3/4，如2D纹理坐标用2，3D坐标/法线用3)
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* @param count 数据数量
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*/
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BufferData *CreateBufferData(void *data,const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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}//namespace graph
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}//namespace hgl
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#endif//HGL_GRAPH_BUFFER_DATA_INCLUDE
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