95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
#ifndef HGL_GRAPH_PRIMITIVE_CREATER_INCLUDE
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#define HGL_GRAPH_PRIMITIVE_CREATER_INCLUDE
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#include<hgl/graph/VKRenderResource.h>
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#include<hgl/graph/VertexAttribDataAccess.h>
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#include<hgl/graph/VKShaderModule.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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* 可绘制图元创建器
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*/
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class PrimitiveCreater
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{
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struct PrimitiveVertexBuffer
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{
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VBO * vbo;
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void * map_data;
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};//struct PrimitiveVertexBuffer
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using PVBMap=ObjectMap<AnsiString,PrimitiveVertexBuffer>;
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protected:
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RenderResource *db;
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const VIL *vil;
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protected:
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uint32 vertices_number;
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IndexBuffer * ibo;
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PVBMap vbo_map;
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protected:
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PrimitiveVertexBuffer *AcquirePVB(const AnsiString &,const void *data); ///<请求一个顶点属性数据区
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void ClearAllData();
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public:
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PrimitiveCreater(RenderResource *sdb,const VIL *);
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virtual ~PrimitiveCreater()=default;
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virtual bool Init(const uint32 vertices_count); ///<初始化，参数为顶点数量
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template<typename T>
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T * AccessVAD(const AnsiString &name) ///<创建一个顶点属性数据缓冲区以及访问器
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{
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const VkFormat format=vil->GetVulkanFormat(name);
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if(format!=T::GetVulkanFormat())
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return(nullptr);
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PrimitiveVertexBuffer *pvb=this->AcquirePVB(name,nullptr);
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if(!pvb)
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return(nullptr);
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T *access=T::Create(vertices_number,pvb->map_data);
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access->Begin();
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return access;
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}
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bool WriteVAD(const AnsiString &name,const void *data,const uint32_t bytes); ///<直接写入顶点属性数据
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template<typename T,IndexType IT>
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T * CreateIBO(const uint count,const T *data=nullptr) ///<创建索引缓冲区
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{
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if(ibo)
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return(nullptr);
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ibo=db->CreateIBO(IT,count,data);
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if(!ibo)
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return(nullptr);
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return (T *)ibo->Map();
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}
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uint8 * CreateIBO8 (uint count,const uint8 *data=nullptr){return CreateIBO<uint8 ,IndexType::U8 >(count,data);} ///<创建8位的索引缓冲区
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uint16 * CreateIBO16(uint count,const uint16 *data=nullptr){return CreateIBO<uint16,IndexType::U16>(count,data);} ///<创建16位的索引缓冲区
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uint32 * CreateIBO32(uint count,const uint32 *data=nullptr){return CreateIBO<uint32,IndexType::U32>(count,data);} ///<创建32位的索引缓冲区
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virtual Primitive * Finish(const AnsiString &); ///<结束并创建可渲染对象
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};//class PrimitiveCreater
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}//namespace graph
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}//namespace hgl
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#endif//HGL_GRAPH_PRIMITIVE_CREATER_INCLUDE
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