Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/d3d11PatchTable.cpp

@@ -0,0 +1,127 @@
+//
+//   Copyright 2015 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#include "../osd/d3d11PatchTable.h"
+
+#include <D3D11.h>
+#include "../far/patchTable.h"
+#include "../osd/cpuPatchTable.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+D3D11PatchTable::D3D11PatchTable() :
+    _indexBuffer(0), _patchParamBuffer(0), _patchParamBufferSRV(0) {
+}
+
+D3D11PatchTable::~D3D11PatchTable() {
+    if (_indexBuffer) _indexBuffer->Release();
+    if (_patchParamBuffer) _patchParamBuffer->Release();
+    if (_patchParamBufferSRV) _patchParamBufferSRV->Release();
+}
+
+D3D11PatchTable *
+D3D11PatchTable::Create(Far::PatchTable const *farPatchTable,
+                        ID3D11DeviceContext *pd3d11DeviceContext) {
+    D3D11PatchTable *instance = new D3D11PatchTable();
+    if (instance->allocate(farPatchTable, pd3d11DeviceContext))
+        return instance;
+    delete instance;
+    return 0;
+}
+
+bool
+D3D11PatchTable::allocate(Far::PatchTable const *farPatchTable,
+                          ID3D11DeviceContext *pd3d11DeviceContext) {
+    ID3D11Device *pd3d11Device = NULL;
+    pd3d11DeviceContext->GetDevice(&pd3d11Device);
+    assert(pd3d11Device);
+
+    CpuPatchTable patchTable(farPatchTable);
+
+    size_t numPatchArrays = patchTable.GetNumPatchArrays();
+    size_t indexSize = patchTable.GetPatchIndexSize();
+    size_t patchParamSize = patchTable.GetPatchParamSize();
+
+    // copy patch array
+    _patchArrays.assign(patchTable.GetPatchArrayBuffer(),
+                        patchTable.GetPatchArrayBuffer() + numPatchArrays);
+
+    // index buffer
+    D3D11_BUFFER_DESC bd;
+    ZeroMemory(&bd, sizeof(bd));
+    bd.ByteWidth = (int)indexSize * sizeof(int);
+    bd.Usage = D3D11_USAGE_DYNAMIC;
+    bd.BindFlags = D3D11_BIND_INDEX_BUFFER;
+    bd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
+    bd.MiscFlags = 0;
+    bd.StructureByteStride = sizeof(int);
+    HRESULT hr = pd3d11Device->CreateBuffer(&bd, NULL, &_indexBuffer);
+    if (FAILED(hr)) {
+        return false;
+    }
+
+    D3D11_MAPPED_SUBRESOURCE mappedResource;
+    hr = pd3d11DeviceContext->Map(_indexBuffer, 0,
+                                  D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
+    if (FAILED(hr)) {
+        return false;
+    }
+    unsigned int * indexBuffer = (unsigned int *) mappedResource.pData;
+    memcpy(indexBuffer,
+           patchTable.GetPatchIndexBuffer(),
+           indexSize * sizeof(unsigned int));
+
+    pd3d11DeviceContext->Unmap(_indexBuffer, 0);
+
+    // patchparam buffer
+    ZeroMemory(&bd, sizeof(bd));
+    bd.ByteWidth = (int)patchParamSize * sizeof(PatchParam);
+    bd.Usage = D3D11_USAGE_DYNAMIC;
+    bd.BindFlags = D3D11_BIND_SHADER_RESOURCE;
+    bd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
+    bd.MiscFlags = 0;
+    bd.StructureByteStride = sizeof(PatchParam);
+    hr = pd3d11Device->CreateBuffer(&bd, NULL, &_patchParamBuffer);
+    if (FAILED(hr)) {
+        return false;
+    }
+
+    D3D11_SHADER_RESOURCE_VIEW_DESC srvd;
+    ZeroMemory(&srvd, sizeof(srvd));
+    srvd.Format = DXGI_FORMAT_R32G32B32_UINT;
+    srvd.ViewDimension = D3D11_SRV_DIMENSION_BUFFER;
+    srvd.Buffer.FirstElement = 0;
+    srvd.Buffer.NumElements = (int)patchParamSize;
+    hr = pd3d11Device->CreateShaderResourceView(
+        _patchParamBuffer, &srvd, &_patchParamBufferSRV);
+    if (FAILED(hr)) {
+        return false;
+    }
+    hr = pd3d11DeviceContext->Map(_patchParamBuffer, 0,
+                                  D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
+    if (FAILED(hr)) {
+        return false;
+    }
+    unsigned int *dst = (unsigned int *) mappedResource.pData;
+    memcpy(dst,
+           patchTable.GetPatchParamBuffer(),
+           patchParamSize * sizeof(PatchParam));
+
+    pd3d11DeviceContext->Unmap(_patchParamBuffer, 0);
+
+    return true;
+}
+
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+}  // end namespace OpenSubdiv
+