#ifndef HGL_GRAPH_VULKAN_VERTEX_ATTRIB_BUFFER_INCLUDE
#define HGL_GRAPH_VULKAN_VERTEX_ATTRIB_BUFFER_INCLUDE

#include<hgl/graph/VKBuffer.h>

namespace hgl
{
    namespace graph
    {
        class VertexAttribBuffer:public DeviceBuffer
        {
            VkFormat format;                    ///<数据格式
            uint32_t stride;                    ///<单个数据字节数
            uint32_t count;                     ///<数据数量

        private:

            friend class GPUDevice;

            VertexAttribBuffer(VkDevice d,const DeviceBufferData &vb,VkFormat fmt,uint32_t _stride,uint32_t _count):DeviceBuffer(d,vb)
            {
                format=fmt;
                stride=_stride;
                count=_count;
            }

        public:

            ~VertexAttribBuffer()=default;

            const VkFormat GetFormat()const { return format; }
            const uint32_t GetStride()const { return stride; }
            const uint32_t GetCount ()const { return count; }

            const VkDeviceSize GetTotalBytes()const { return stride*count; }
            
        public:

            void *  Map     (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Map(start*stride,size*stride);}
            void    Flush   (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Flush(start*stride,size*stride);}
            void    Flush   (VkDeviceSize size)                             override {return DeviceBuffer::Flush(size*stride);}
            
            bool    Write   (const void *ptr,uint32_t start,uint32_t size)  override {return DeviceBuffer::Write(ptr,start*stride,size*stride);}
            bool    Write   (const void *ptr,uint32_t size)                 override {return DeviceBuffer::Write(ptr,0,size*stride);}
        };//class VertexAttribBuffer:public DeviceBuffer

        using VAB=VertexAttribBuffer;
    }//namespace graph
}//namespace hgl
#endif//HGL_GRAPH_VULKAN_VERTEX_ATTRIB_BUFFER_INCLUDE
