/**************************************************************************/
/*  openxr_d3d12_extension.h                                              */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* 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  */
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/**************************************************************************/

#pragma once

#ifdef D3D12_ENABLED

#include "../../openxr_api.h"
#include "../../util.h"
#include "../openxr_extension_wrapper.h"

#include "core/templates/vector.h"
#include "drivers/d3d12/d3d12_hooks.h"

// Always include this as late as possible.
#include "../../openxr_platform_inc.h"

class OpenXRD3D12Extension : public OpenXRGraphicsExtensionWrapper, D3D12Hooks {
public:
	virtual HashMap<String, bool *> get_requested_extensions(XrVersion p_version) override;

	virtual void on_instance_created(const XrInstance p_instance) override;
	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;

	virtual D3D_FEATURE_LEVEL get_feature_level() const override final;
	virtual LUID get_adapter_luid() const override final;
	virtual void set_device(ID3D12Device *p_device) override final;
	virtual void set_command_queue(ID3D12CommandQueue *p_queue) override final;
	virtual void cleanup_device() override final;

	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
	virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
	virtual RID get_density_map(void *p_swapchain_graphics_data, int p_image_index) override { return RID(); }

private:
	static OpenXRD3D12Extension *singleton;

	static XrGraphicsBindingD3D12KHR graphics_binding_d3d12;

	struct SwapchainGraphicsData {
		bool is_multiview;
		Vector<RID> texture_rids;
	};

	EXT_PROTO_XRRESULT_FUNC3(xrGetD3D12GraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsD3D12KHR *), p_graphics_requirements)
	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)

	ComPtr<ID3D12Device> graphics_device;
	ComPtr<ID3D12CommandQueue> command_queue;
};

#endif // D3D12_ENABLED
