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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_NodeOperation.h"
namespace blender::compositor {
/* TODO(manzanilla): After removing tiled implementation, implement a default #determineResolution
* for all constant operations and make all initialization and deinitilization methods final. */
/**
* Base class for operations that are always constant. Operations that can be constant only when
* all their inputs are so, are evaluated into primitive constants (Color/Vector/Value) during
* constant folding.
*/
class ConstantOperation : public NodeOperation {
protected:
bool needs_canvas_to_get_constant_;
public:
ConstantOperation();
/** May require resolution to be already determined. */
virtual const float *get_constant_elem() = 0;
bool can_get_constant_elem() const;
void update_memory_buffer(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs) final;
};
} // namespace blender::compositor
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