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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. All rights reserved. */
#include "GPU_state.h"
#include "GPU_texture.h"
#include "MEM_guardedalloc.h"
#include "VPC_context.hh"
#include "VPC_reduce_to_single_value_processor_operation.hh"
#include "VPC_result.hh"
namespace blender::viewport_compositor {
ReduceToSingleValueProcessorOperation::ReduceToSingleValueProcessorOperation(Context &context,
ResultType type)
: ProcessorOperation(context)
{
InputDescriptor input_descriptor;
input_descriptor.type = type;
declare_input_descriptor(input_descriptor);
populate_result(Result(type, texture_pool()));
}
void ReduceToSingleValueProcessorOperation::execute()
{
const Result &input = get_input();
GPU_memory_barrier(GPU_BARRIER_TEXTURE_UPDATE);
float *pixel = static_cast<float *>(GPU_texture_read(input.texture(), GPU_DATA_FLOAT, 0));
Result &result = get_result();
result.allocate_single_value();
switch (result.type()) {
case ResultType::Color:
result.set_color_value(pixel);
break;
case ResultType::Vector:
result.set_vector_value(pixel);
break;
case ResultType::Float:
result.set_float_value(*pixel);
break;
}
MEM_freeN(pixel);
}
} // namespace blender::viewport_compositor
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