差分

このページの2つのバージョン間の差分を表示します。

--- d3d:d3d12:texture [2015/09/20 19:37] – [Texture の転送] oga
+++ d3d:d3d12:texture [2015/09/20 20:45] (現在) – [例] oga
@@ 行 1: / 行 1: @@
 ====== Texture の転送 ======
-===== Texture の転送 =====
+===== 転送手順の概要 =====
 Buffer, Texture の転送もアプリケーション側で管理する必要があります。
@@ 行 19: / 行 19: @@
   - CommandQueue に転送完了 Fence (Sginal) を挿入
   - Fence で転送完了を確認。完了後は Upload 用の Buffer と CommandList を Release できる。
+===== 例 =====
+Texture 用 Resource 作成。
+<code cpp>
+ID3D12Resource* iTexture= nullptr;
+D3D12_RESOURCE_DESC  desc;
+memset( &desc, 0, sizeof(desc) );
+desc.Dimension= D3D12_RESOURCE_DIMENSION_TEXTURE2D;
+desc.Width= 512;
+desc.Height= 512;
+desc.DepthOrArraySize= 1;
+desc.MipLevels= 1;
+desc.Format= DXGI_FORMAT_R8G8B8A8_UNORM;
+desc.SampleDesc.Count= 1;
+D3D12_HEAP_PROPERTIES  heap;
+memset( &heap, 0, sizeof(heap) );
+heap.Type= D3D12_HEAP_TYPE_DEFAULT;
+iD3DDevice->CreateCommitedResource( &heap, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_COPY_DEST, nullptr, IID_PPV_ARGS(&iTexture) );
+</code>
+Footprint 取得。
+<code cpp>
+D3D12_PLACED_SUBRESOURCE_FOOTPRINT  footprint;
+UINT64  total_bytes= 0;
+iD3DDevice->GetCopyableFootprints( &desc, 0, 1, 0, &footprint, nullptr, nullptr, &total_bytes );
+</code>
+Upload 用 Buffer 作成
+<code cpp>
+D3D12_RESOURCE_DESC  desc;
+memset( &desc, 0, sizeof(desc) );
+desc.Dimension= D3D12_RESOURCE_DIMENSION_BUFFER;
+desc.Width= total_bytes;
+desc.Height= 1;
+desc.DepthOrArraySize= 1;
+desc.MipLevels= 1;
+desc.SamleDesc.Count= 1;
+desc.Layout= D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
+D3D12_HEAP_PROPERTIES  heap;
+memset( &heap, 0, sizeof(heap) );
+heap.Type= D3D12_HEAP_TYPE_UPLOAD;
+ID3D12Resource*  iUploadBuffer= nullptr;
+iD3DDevice->CreateCommittedResource( &heap, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, nullptr, IID_PPV_ARGS(&iUploadBuffer) );
+</code>
+Upload Buffer への書き込み。
+<code cpp>
+void*  ptr= nullptr;
+iUploadBuffer->Map( 0, nullptr, &ptr );
+memcpy( reinterpret_cast<unsigned char*>(ptr) + footprint.Offset, pixel_data, pixel_data_size );
+</code>
+Copy コマンド作成
+<code cpp>
+D3D12_TEXTURE_COPY_LOCATION  dest;
+memset( &dest, 0, sizeof(dest) );
+dest.pResource= iTexture;
+dest.Type= D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
+dest.SubresourceIndex= 0;
+D3D12_TEXTURE_COPY_LOCATION  src;
+memset( &src, 0, sizeof(src) );
+src.pResource= iUploadBuffer;
+src.Type= D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
+src.PlacedFootprint= footprint;
+ID3D12GraphicsCommandList*  iCommandList= GetCurrentCommandList();
+iCommandList->CopyTextureRegion( &dest, 0, 0, 0, &src, nullptr );
+</code>
+ResourceBarrier 挿入
+<code cpp>
+D3D12_RESOURCE_BARRIER  barrier;
+memset( &barrier, 0, sizeof(barrier) );
+barrier.Type= D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+barrier.Transition.pResource= iTexture;
+barrier.Transition.Subresource= D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+barrier.Transition.StateBefore= D3D12_RESOURCE_STATE_COPY_DEST;
+barrier.Transition.StateAfter= D3D12_RESOURCE_STATE_GENERIC_READ;
+iCommandList->ResourceBarrier( 1, &barrier );
+</code>
+Command 実行
+<code cpp>
+iCommandList->Close();
+ID3D12CommandList*  list[]= { iCommandList };
+iCommandQueue->ExecuteCommandLists( 1, list );
+FenceCount++;
+iCommandQueue->Signal( iUploadFence, FenceCount );
+</code>
+ResourceView の作成
+<code cpp>
+D3D12_SHADER_RESOURCE_VIEW_DESC  desc;
+memset( &desc, 0, sizeof(desc) );
+desc.Format= DXGI_FORMAT_R8G8B8A8_UNORM;
+desc.ViewDimension= D3D12_SRV_DIMENSION_TEXTURE2D;
+desc.Shader4ComponentMapping= D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
+desc.Texture2D.MipLevels= 1;
+D3D12_CPU_DESCRIPTOR_HANDLE  cpu_handle= iDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
+iD3DDevice->CreateShaderResourceView( iTexture, &desc, cpu_handle );
+</code>