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Diffstat (limited to 'source/blender/compositor/realtime_compositor/COM_reduce_to_single_value_operation.hh')
-rw-r--r-- | source/blender/compositor/realtime_compositor/COM_reduce_to_single_value_operation.hh | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/source/blender/compositor/realtime_compositor/COM_reduce_to_single_value_operation.hh b/source/blender/compositor/realtime_compositor/COM_reduce_to_single_value_operation.hh new file mode 100644 index 00000000000..2f5a82c79b7 --- /dev/null +++ b/source/blender/compositor/realtime_compositor/COM_reduce_to_single_value_operation.hh @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#pragma once + +#include "COM_context.hh" +#include "COM_result.hh" +#include "COM_simple_operation.hh" + +namespace blender::realtime_compositor { + +/* ------------------------------------------------------------------------------------------------ + * Reduce To Single Value Operation + * + * A simple operation that reduces its input result into a single value output result. The input is + * assumed to be a texture result of size 1x1, that is, a texture composed of a single pixel, the + * value of which shall serve as the single value of the output result. */ +class ReduceToSingleValueOperation : public SimpleOperation { + public: + ReduceToSingleValueOperation(Context &context, ResultType type); + + /* Download the input pixel from the GPU texture and set its value to the value of the allocated + * single value output result. */ + void execute() override; + + /* Determine if a reduce to single value operation is needed for the input with the + * given result. If it is not needed, return a null pointer. If it is needed, return an instance + * of the operation. */ + static SimpleOperation *construct_if_needed(Context &context, const Result &input_result); +}; + +} // namespace blender::realtime_compositor |