Fixing depth mip generation

src/Engine/Graphics/RenderPass/DepthCullingPass.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "MinimalEngine.h"
 #include "RenderPass.h"
+#include "Graphics/Pipeline.h"
 #include "Graphics/Query.h"
 
 namespace Seele {
@@ -17,13 +18,28 @@ class DepthCullingPass : public RenderPass {
     virtual void createRenderPass() override;
 
   private:
-    Gfx::OTexture2D depthMipTexture;
+    constexpr static uint64 BLOCK_SIZE = 32;
+    struct MipParam {
+        uint32 srcMipOffset;
+        uint32 dstMipOffset;
+        UVector2 srcMipDim;
+        UVector2 dstMipDim;
+    };
+    Array<uint32> mipOffsets;
+    Array<UVector2> mipDims;
+    Gfx::OShaderBuffer depthMipBuffer;
     Gfx::RenderTargetAttachment depthAttachment;
     Gfx::RenderTargetAttachment visibilityAttachment;
-    Gfx::ODescriptorLayout depthTextureLayout;
-    Gfx::OPipelineLayout depthPrepassLayout;
+    Gfx::ODescriptorLayout depthAttachmentLayout;
+    Gfx::OPipelineLayout depthCullingLayout;
     Gfx::OPipelineStatisticsQuery query;
 
+    Gfx::OPipelineLayout depthComputeLayout;
+    Gfx::OComputeShader depthInitialReduceShader;
+    Gfx::PComputePipeline depthInitialReduce;
+    Gfx::OComputeShader depthMipGenShader;
+    Gfx::PComputePipeline depthMipGen;
+
     Gfx::PShaderBuffer cullingBuffer;
 };
 DEFINE_REF(DepthCullingPass)