137 lines
6.9 KiB
C++
137 lines
6.9 KiB
C++
#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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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 GLsizeiptr &length);
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BufferData(char *data,const GLsizeiptr &length)
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{
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total_bytes =length;
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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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GLsizeiptr GetTotalBytes ()const {return total_bytes;} ///<取得数据总字节数
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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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BufferData *CreateBufferData(const GLsizeiptr &length);
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BufferData *CreateBufferData(void *data,const GLsizeiptr &length);
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class VertexBufferData:public BufferData
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{
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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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protected:
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friend VertexBufferData *CreateVertexBufferData(void *data,const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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VertexBufferData(const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count,char *data):BufferData(data,dbytes*dcm*count)
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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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}
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public:
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virtual ~VertexBufferData()=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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};
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/**
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* 创建一个顶点数据缓冲区<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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VertexBufferData *CreateVertexBufferData(const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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/**
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* 创建一个顶点数据缓冲区
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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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VertexBufferData *CreateVertexBufferData(void *data,const GLenum &dt,const uint &dbytes,const uint &dcm,const GLsizeiptr &count);
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#define VBDATA_CREATE_FUNC(type,gl_type,short_name) \
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inline VertexBufferData *VB1##short_name(const GLsizeiptr &count){return CreateVertexBufferData(gl_type,sizeof(type),1,count);} \
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inline VertexBufferData *VB2##short_name(const GLsizeiptr &count){return CreateVertexBufferData(gl_type,sizeof(type),2,count);} \
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inline VertexBufferData *VB3##short_name(const GLsizeiptr &count){return CreateVertexBufferData(gl_type,sizeof(type),3,count);} \
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inline VertexBufferData *VB4##short_name(const GLsizeiptr &count){return CreateVertexBufferData(gl_type,sizeof(type),4,count);} \
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\
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inline VertexBufferData *VB1##short_name(const GLsizeiptr &count,const type *data){return CreateVertexBufferData((void *)data,gl_type,sizeof(type),1,count);} \
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inline VertexBufferData *VB2##short_name(const GLsizeiptr &count,const type *data){return CreateVertexBufferData((void *)data,gl_type,sizeof(type),2,count);} \
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inline VertexBufferData *VB3##short_name(const GLsizeiptr &count,const type *data){return CreateVertexBufferData((void *)data,gl_type,sizeof(type),3,count);} \
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inline VertexBufferData *VB4##short_name(const GLsizeiptr &count,const type *data){return CreateVertexBufferData((void *)data,gl_type,sizeof(type),4,count);}
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VBDATA_CREATE_FUNC(int8, GL_BYTE, i8)
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VBDATA_CREATE_FUNC(int8, GL_BYTE, b)
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VBDATA_CREATE_FUNC(int16, GL_SHORT, i16)
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VBDATA_CREATE_FUNC(int16, GL_SHORT, s)
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VBDATA_CREATE_FUNC(int32, GL_INT, i32)
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VBDATA_CREATE_FUNC(int32, GL_INT, i)
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VBDATA_CREATE_FUNC(uint8, GL_UNSIGNED_BYTE, u8)
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VBDATA_CREATE_FUNC(uint8, GL_UNSIGNED_BYTE, ub)
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VBDATA_CREATE_FUNC(uint16,GL_UNSIGNED_SHORT, u16)
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VBDATA_CREATE_FUNC(uint16,GL_UNSIGNED_SHORT, us)
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VBDATA_CREATE_FUNC(uint32,GL_UNSIGNED_INT, u32)
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VBDATA_CREATE_FUNC(uint32,GL_UNSIGNED_INT, ui)
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VBDATA_CREATE_FUNC(uint16,GL_HALF_FLOAT, hf)
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VBDATA_CREATE_FUNC(uint16,GL_HALF_FLOAT, f16)
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VBDATA_CREATE_FUNC(float, GL_FLOAT, f)
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VBDATA_CREATE_FUNC(float, GL_FLOAT, f32)
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VBDATA_CREATE_FUNC(double,GL_DOUBLE, d)
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VBDATA_CREATE_FUNC(double,GL_DOUBLE, f64)
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#undef VBDATA_CREATE_FUNC
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inline VertexBufferData *EB16(const uint16 &count){return CreateVertexBufferData(GL_UNSIGNED_SHORT, 2,1,count);}
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inline VertexBufferData *EB32(const uint32 &count){return CreateVertexBufferData(GL_UNSIGNED_INT, 4,1,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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