Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/session/output_driver.h

@@ -0,0 +1,70 @@
+/* SPDX-FileCopyrightText: 2021-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "util/math.h"
+#include "util/string.h"
+#include "util/types.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Output driver for reading render buffers.
+ *
+ * Host applications implement this interface for outputting render buffers for offline rendering.
+ * Drivers can be used to copy the buffers into the host application or write them directly to
+ * disk. This interface may also be used for interactive display, however the DisplayDriver is more
+ * efficient for that purpose.
+ */
+class OutputDriver {
+ public:
+  OutputDriver() = default;
+  virtual ~OutputDriver() = default;
+
+  class Tile {
+   public:
+    Tile(const int2 offset,
+         const int2 size,
+         const int2 full_size,
+         const string_view layer,
+         const string_view view)
+        : offset(offset), size(size), full_size(full_size), layer(layer), view(view)
+    {
+    }
+    virtual ~Tile() = default;
+
+    const int2 offset;
+    const int2 size;
+    const int2 full_size;
+    const string layer;
+    const string view;
+
+    virtual bool get_pass_pixels(const string_view pass_name,
+                                 const int num_channels,
+                                 float *pixels) const = 0;
+    virtual bool set_pass_pixels(const string_view pass_name,
+                                 const int num_channels,
+                                 const float *pixels) const = 0;
+  };
+
+  /* Write tile once it has finished rendering. */
+  virtual void write_render_tile(const Tile &tile) = 0;
+
+  /* Update tile while rendering is in progress. Return true if any update
+   * was performed. */
+  virtual bool update_render_tile(const Tile & /* tile */)
+  {
+    return false;
+  }
+
+  /* For baking, read render pass PASS_BAKE_PRIMITIVE/SEED/DIFFERENTIAL
+   * to determine which shading points to use for baking at each pixel. Return
+   * true if any data was read. */
+  virtual bool read_render_tile(const Tile & /* tile */)
+  {
+    return false;
+  }
+};
+
+CCL_NAMESPACE_END