49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright 2021, Blender Foundation.
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*/
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#pragma once
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#include "COM_NodeOperation.h"
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namespace blender::compositor {
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/* TODO(manzanilla): After removing tiled implementation, implement a default #determine_resolution
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* for all constant operations and make all initialization and deinitilization methods final. */
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/**
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* Base class for operations that are always constant. Operations that can be constant only when
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* all their inputs are so, are evaluated into primitive constants (Color/Vector/Value) during
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* constant folding.
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*/
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class ConstantOperation : public NodeOperation {
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protected:
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bool needs_canvas_to_get_constant_;
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public:
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ConstantOperation();
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/** May require resolution to be already determined. */
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virtual const float *get_constant_elem() = 0;
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bool can_get_constant_elem() const;
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void update_memory_buffer(MemoryBuffer *output,
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const rcti &area,
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Span<MemoryBuffer *> inputs) final;
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};
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} // namespace blender::compositor
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