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added comment about memory property in VKDeviceBuffer.cpp

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HuYingzhuo(hugo/hyzboy) 2023-04-25 15:21:23 +08:00
parent ba6af7a596
commit 1ec88c65f8
1 changed files with 5 additions and 2 deletions
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7
src/SceneGraph/Vulkan/VKDeviceBuffer.cpp
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@ -26,7 +26,10 @@ bool GPUDevice::CreateBuffer(DeviceBufferData *buf,VkBufferUsageFlags buf_usage,
vkGetBufferMemoryRequirements(attr->device,buf->buffer,&mem_reqs); vkGetBufferMemoryRequirements(attr->device,buf->buffer,&mem_reqs);
DeviceMemory *dm=CreateMemory(mem_reqs,VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT|VK_MEMORY_PROPERTY_HOST_COHERENT_BIT); DeviceMemory *dm=CreateMemory(mem_reqs, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT //CPU端可以Map
|VK_MEMORY_PROPERTY_HOST_COHERENT_BIT); //CPU端无需Flush,即可被GPU访问
//注：这个模式并非最佳效能，但是在开发时最为方便
//Device Local模式仅支持GPU访问，是性能最佳，考虑在一些极端情况下使用
if(dm&&dm->BindBuffer(buf->buffer)) if(dm&&dm->BindBuffer(buf->buffer))
{ {
@ -38,7 +41,7 @@ bool GPUDevice::CreateBuffer(DeviceBufferData *buf,VkBufferUsageFlags buf_usage,
if(!data) if(!data)
return(true); return(true);
dm->Write(data,0,size); dm->Write(data,0,size);
return(true); return(true);
} }