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diff --git a/source/blender/compositor/intern/COM_FullFrameExecutionModel.h b/source/blender/compositor/intern/COM_FullFrameExecutionModel.h
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright 2021, Blender Foundation.
+ */
+
+#pragma once
+
+#include "COM_ExecutionModel.h"
+
+#ifdef WITH_CXX_GUARDEDALLOC
+#  include "MEM_guardedalloc.h"
+#endif
+
+namespace blender::compositor {
+
+/* Forward declarations. */
+class ExecutionGroup;
+
+/**
+ * Fully renders operations in order from inputs to outputs.
+ */
+class FullFrameExecutionModel : public ExecutionModel {
+ private:
+  /**
+   * Contains operations active buffers data. Buffers will be disposed once reader operations are
+   * finished.
+   */
+  SharedOperationBuffers &active_buffers_;
+
+  /**
+   * Number of operations finished.
+   */
+  int num_operations_finished_;
+
+  /**
+   * Order of priorities for output operations execution.
+   */
+  Vector<eCompositorPriority> priorities_;
+
+  ThreadMutex work_mutex_;
+  ThreadCondition work_finished_cond_;
+
+ public:
+  FullFrameExecutionModel(CompositorContext &context,
+                          SharedOperationBuffers &shared_buffers,
+                          Span<NodeOperation *> operations);
+  ~FullFrameExecutionModel();
+
+  void execute(ExecutionSystem &exec_system) override;
+
+  void execute_work(const rcti &work_rect,
+                    std::function<void(const rcti &split_rect)> work_func) override;
+
+ private:
+  void determine_areas_to_render_and_reads();
+  void render_operations(ExecutionSystem &exec_system);
+
+  void ensure_inputs_rendered(NodeOperation *op, ExecutionSystem &exec_system);
+  Vector<MemoryBuffer *> get_input_buffers(NodeOperation *op);
+  MemoryBuffer *create_operation_buffer(NodeOperation *op);
+  void render_operation(NodeOperation *op, ExecutionSystem &exec_system);
+
+  void operation_finished(NodeOperation *operation);
+
+  void get_output_render_area(NodeOperation *output_op, rcti &r_area);
+  void determine_areas_to_render(NodeOperation *operation, const rcti &render_area);
+  void determine_reads(NodeOperation *operation);
+
+  void update_progress_bar();
+
+#ifdef WITH_CXX_GUARDEDALLOC
+  MEM_CXX_CLASS_ALLOC_FUNCS("COM:FullFrameExecutionModel")
+#endif
+};
+
+}  // namespace blender::compositor