#include "buffer_view.h"
#include "shared.h"

namespace vk
{
	buffer_view::buffer_view(VkDevice dev, VkBuffer buffer, VkFormat format, VkDeviceSize offset, VkDeviceSize size)
	    : m_device(dev)
	{
		info.buffer = buffer;
		info.format = format;
		info.offset = offset;
		info.range  = size;
		info.sType  = VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO;
		CHECK_RESULT(vkCreateBufferView(m_device, &info, nullptr, &value));
	}

	buffer_view::~buffer_view()
	{
		vkDestroyBufferView(m_device, value, nullptr);
	}

	bool buffer_view::in_range(u32 address, u32 size, u32& offset) const
	{
		if (address < info.offset)
			return false;

		const u32 _offset = address - static_cast<u32>(info.offset);
		if (info.range < _offset)
			return false;

		const auto remaining = info.range - _offset;
		if (size <= remaining)
		{
			offset = _offset;
			return true;
		}

		return false;
	}
}