/*
 * Copyright © 2024 Valve Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#version 460

#extension GL_GOOGLE_include_directive : require

#extension GL_EXT_shader_explicit_arithmetic_types_int8 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int16 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int32 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int64 : require
#extension GL_EXT_shader_explicit_arithmetic_types_float16 : require
#extension GL_EXT_scalar_block_layout : require
#extension GL_EXT_buffer_reference : require
#extension GL_EXT_buffer_reference2 : require

layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

#include "tu_build_interface.h"

layout(push_constant) uniform CONSTS
{
   header_args args;
};

void
main(void)
{
   uint32_t compacted_size = args.bvh_offset + DEREF(args.src).dst_node_offset * SIZEOF(tu_internal_node);

   uint32_t serialization_size = compacted_size + SIZEOF(uint64_t) * args.instance_count;

   uint32_t size = serialization_size - SIZEOF(vk_accel_struct_serialization_header) -
                   SIZEOF(uint64_t) * args.instance_count;

   DEREF(args.dst).compacted_size = compacted_size;

   DEREF(args.dst).copy_dispatch_size[0] = DIV_ROUND_UP(compacted_size, 16 * 128);
   DEREF(args.dst).copy_dispatch_size[1] = 1;
   DEREF(args.dst).copy_dispatch_size[2] = 1;

   DEREF(args.dst).serialization_size = serialization_size;

   DEREF(args.dst).size = size;
}