78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
#ifndef HGL_GRAPH_VULKAN_ARRAY_BUFFER_INCLUDE
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#define HGL_GRAPH_VULKAN_ARRAY_BUFFER_INCLUDE
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#include<hgl/graph/VK.h>
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#include<hgl/graph/VKDynamicBufferAccess.h>
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namespace hgl
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{
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class Collection;
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namespace graph
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{
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class VKMemoryAllocator;
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/**
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* GPU数据阵列缓冲区<br>
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* 它用于储存多份相同格式的数据，常用于多物件渲染，instance等
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*/
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class GPUArrayBuffer
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{
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protected:
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uint align_size;
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uint range_size;
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VKMemoryAllocator *vk_ma;
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Collection *coll;
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protected:
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void * Map(const uint32 start,const uint32 count);
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void Flush(const uint32 count);
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private:
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GPUArrayBuffer(VKMemoryAllocator *,const uint,const uint);
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friend class GPUDevice;
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public:
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virtual ~GPUArrayBuffer();
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const uint32_t GetAlignSize()const{return align_size;} ///<数据对齐字节数
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const uint32_t GetRangeSize()const{return range_size;} ///<单次渲染访问最大字节数
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DeviceBuffer * GetBuffer();
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uint32 Alloc(const uint32 max_count); ///<预分配空间
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void Clear();
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template<typename T>
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bool Start(DynamicBufferAccess<T> *dba,const uint32 start,const uint32 count)
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{
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if(!dba)return(false);
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void *ptr=Map(start,count);
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if(!ptr)return(false);
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dba->Start((uchar *)ptr,align_size,count);
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return(true);
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}
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template<typename T>
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void End(DynamicBufferAccess<T> *dba)
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{
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if(!dba)return;
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Flush(dba->GetCount());
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dba->Restart();
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}
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};//class GPUArrayBuffer
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}//namespace graph
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}//namespace hgl
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#endif//HGL_GRAPH_VULKAN_ARRAY_BUFFER_INCLUDE
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