/*
 *  Created on: Oct 3, 2019

	Copyright 2019 flyinghead

	This file is part of Flycast.

    Flycast is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    Flycast is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Flycast.  If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "vulkan.h"

struct BufferData
{
	BufferData(vk::PhysicalDevice const& physicalDevice, vk::Device const& device, vk::DeviceSize size, vk::BufferUsageFlags usage,
			vk::MemoryPropertyFlags propertyFlags = vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);

	void upload(vk::Device const& device, u32 size, const void *data, u32 offset = 0) const
	{
		verify((m_propertyFlags & vk::MemoryPropertyFlagBits::eHostCoherent) && (m_propertyFlags & vk::MemoryPropertyFlagBits::eHostVisible));
		verify(offset + size <= m_size);

		void* dataPtr = device.mapMemory(*this->deviceMemory, offset, size);
		memcpy(dataPtr, data, size);
		device.unmapMemory(*this->deviceMemory);
	}

	void upload(vk::Device const& device, size_t count, u32 *sizes, const void **data, u32 offset = 0) const
	{
		verify((m_propertyFlags & vk::MemoryPropertyFlagBits::eHostCoherent) && (m_propertyFlags & vk::MemoryPropertyFlagBits::eHostVisible));

		u32 totalSize = 0;
		for (int i = 0; i < count; i++)
			totalSize += sizes[i];
		verify(offset + totalSize <= m_size);
		void* dataPtr = device.mapMemory(*this->deviceMemory, offset, totalSize);
		for (int i = 0; i < count; i++)
		{
			memcpy(dataPtr, data[i], sizes[i]);
			dataPtr = (u8 *)dataPtr + sizes[i];
		}
		device.unmapMemory(*this->deviceMemory);
	}

	vk::UniqueDeviceMemory  deviceMemory;
	vk::UniqueBuffer        buffer;
	vk::DeviceSize          m_size;

#if !defined(NDEBUG)
private:
	vk::BufferUsageFlags    m_usage;
	vk::MemoryPropertyFlags m_propertyFlags;
#endif
};
