Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/hydra/render_buffer.h

@@ -0,0 +1,90 @@
+/* SPDX-FileCopyrightText: 2022 NVIDIA Corporation
+ * SPDX-FileCopyrightText: 2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "hydra/config.h"
+
+#include <pxr/imaging/hd/renderBuffer.h>
+
+HDCYCLES_NAMESPACE_OPEN_SCOPE
+
+class HdCyclesRenderBuffer final : public PXR_NS::HdRenderBuffer {
+ public:
+  HdCyclesRenderBuffer(const PXR_NS::SdfPath &bprimId);
+  ~HdCyclesRenderBuffer() override;
+
+  void Finalize(PXR_NS::HdRenderParam *renderParam) override;
+
+  bool Allocate(const PXR_NS::GfVec3i &dimensions,
+                PXR_NS::HdFormat format,
+                bool multiSampled) override;
+
+  unsigned int GetWidth() const override
+  {
+    return _width;
+  }
+
+  unsigned int GetHeight() const override
+  {
+    return _height;
+  }
+
+  unsigned int GetDepth() const override
+  {
+    return 1u;
+  }
+
+  PXR_NS::HdFormat GetFormat() const override
+  {
+    return _format;
+  }
+
+  bool IsMultiSampled() const override
+  {
+    return false;
+  }
+
+  void *Map() override;
+
+  void Unmap() override;
+
+  bool IsMapped() const override;
+
+  void Resolve() override;
+
+  bool IsConverged() const override;
+
+  void SetConverged(bool converged);
+
+  bool IsResourceUsed() const;
+
+  PXR_NS::VtValue GetResource(bool multiSampled = false) const override;
+
+  void SetResource(const PXR_NS::VtValue &resource);
+
+  void WritePixels(const float *pixels,
+                   const PXR_NS::GfVec2i &offset,
+                   const PXR_NS::GfVec2i &dims,
+                   const int channels,
+                   bool isId = false);
+
+ private:
+  void _Deallocate() override;
+
+  unsigned int _width = 0u;
+  unsigned int _height = 0u;
+  PXR_NS::HdFormat _format = PXR_NS::HdFormatInvalid;
+  size_t _dataSize = 0;
+
+  std::vector<uint8_t> _data;
+  PXR_NS::VtValue _resource;
+  mutable std::atomic_bool _resourceUsed = false;
+
+  std::atomic_int _mapped = 0;
+  std::atomic_bool _converged = false;
+};
+
+HDCYCLES_NAMESPACE_CLOSE_SCOPE