Vulkan & Native Rendering Plugin

Hi,

We are developing a native rendering plugins and encountering a few issues when implementing Vulkan render API.

First of all, here how we proceed.
1. We are using the unity mesh API to get Vertex and Index Buffers with

GetNativeVertexBufferPtr

and

 GetNativeIndexBufferPtr

.
2. Pass those to the native plugin.
3. Map. Write Data. UnMap.
We successfully implemented this pipeline on several different graphics API.

Now for Vulkan :
1. We correctly overload Initialization and load function symbols.
2. We created the instance, get the

m_UnityInterfaces->Get<IUnityGraphicsVulkan>()'

3. Based on https://github.com/Unity-Technologi...ster/PluginSource/source/RenderAPI_Vulkan.cpp
We tried to Begin Modify the buffer but the recording state send back by

m_UnityVulkan->CommandRecordingState(&recordingState, kUnityVulkanGraphicsQueueAccess_DontCare)

is uninitialized. and the subsequent

m_UnityVulkan->AccessBuffer(buffer, 0, 0, kUnityVulkanResourceAccess_ObserveOnly, &bufferInfo)

fail and return null.

Notes :
-

 IUnityGraphicsVulkan *m_UnityVulkan

Has two member left to null when trying to map : AccessTexture and AccessRenderBufferTexture
-

 Hook_vkCmdBeginRenderPass

is working as intended and correctly overwrite clear color.
- Unity Version 2019.1.8f1

Thanks !

 

Hi,

We managed to make it work, by having a function return the IUnityGraphicsVulkan instead of a IUnityGraphics that we then cast to a IUnityGraphicsVulkan.

My bad and thanks for your answer !