// Copyright 2021 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "Buffer.hpp"

Buffer::Buffer(vk::Device device, vk::DeviceSize size, vk::BufferUsageFlags usage)
    : device(device)
    , size(size)
{
	vk::BufferCreateInfo bufferInfo{};
	bufferInfo.size = size;
	bufferInfo.usage = usage;
	bufferInfo.sharingMode = vk::SharingMode::eExclusive;

	buffer = device.createBuffer(bufferInfo);

	auto memRequirements = device.getBufferMemoryRequirements(buffer);

	vk::MemoryAllocateInfo allocInfo{};
	allocInfo.allocationSize = memRequirements.size;
	allocInfo.memoryTypeIndex = 0;  // TODO: getMemoryTypeIndex(memRequirements.memoryTypeBits, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);

	bufferMemory = device.allocateMemory(allocInfo);
	device.bindBufferMemory(buffer, bufferMemory, 0);
}

Buffer::~Buffer()
{
	device.freeMemory(bufferMemory);
	device.destroyBuffer(buffer);
}