/**************************************************************************/
/*  rendering_context_driver.cpp                                          */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             AETHEX ENGINE                               */
/*                        https://aethex.dev                         */
/**************************************************************************/
/* Copyright (c) 2014-present AETHEX ENGINE contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
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/* 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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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
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/**************************************************************************/

#include "rendering_context_driver.h"

RenderingContextDriver::~RenderingContextDriver() {
}

RenderingContextDriver::SurfaceID RenderingContextDriver::surface_get_from_window(DisplayServer::WindowID p_window) const {
	HashMap<DisplayServer::WindowID, SurfaceID>::ConstIterator it = window_surface_map.find(p_window);
	if (it != window_surface_map.end()) {
		return it->value;
	} else {
		return SurfaceID();
	}
}

Error RenderingContextDriver::window_create(DisplayServer::WindowID p_window, const void *p_platform_data) {
	SurfaceID surface = surface_create(p_platform_data);
	if (surface != 0) {
		window_surface_map[p_window] = surface;
		return OK;
	} else {
		return ERR_CANT_CREATE;
	}
}

void RenderingContextDriver::window_set_size(DisplayServer::WindowID p_window, uint32_t p_width, uint32_t p_height) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_size(surface, p_width, p_height);
	}
}

void RenderingContextDriver::window_set_vsync_mode(DisplayServer::WindowID p_window, DisplayServer::VSyncMode p_vsync_mode) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_vsync_mode(surface, p_vsync_mode);
	}
}

DisplayServer::VSyncMode RenderingContextDriver::window_get_vsync_mode(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		return surface_get_vsync_mode(surface);
	} else {
		return DisplayServer::VSYNC_DISABLED;
	}
}

void RenderingContextDriver::window_set_hdr_output_enabled(DisplayServer::WindowID p_window, bool p_enabled) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_hdr_output_enabled(surface, p_enabled);
	}
}

bool RenderingContextDriver::window_get_hdr_output_enabled(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		return surface_get_hdr_output_enabled(surface);
	} else {
		return false;
	}
}

void RenderingContextDriver::window_set_hdr_output_reference_luminance(DisplayServer::WindowID p_window, float p_reference_luminance) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_hdr_output_reference_luminance(surface, p_reference_luminance);
	}
}

float RenderingContextDriver::window_get_hdr_output_reference_luminance(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		return surface_get_hdr_output_reference_luminance(surface);
	} else {
		return 0.0f;
	}
}

void RenderingContextDriver::window_set_hdr_output_max_luminance(DisplayServer::WindowID p_window, float p_max_luminance) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_hdr_output_max_luminance(surface, p_max_luminance);
	}
}

float RenderingContextDriver::window_get_hdr_output_max_luminance(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		return surface_get_hdr_output_max_luminance(surface);
	} else {
		return 0.0f;
	}
}

void RenderingContextDriver::window_set_hdr_output_linear_luminance_scale(DisplayServer::WindowID p_window, float p_linear_luminance_scale) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_set_hdr_output_linear_luminance_scale(surface, p_linear_luminance_scale);
	}
}

float RenderingContextDriver::window_get_hdr_output_linear_luminance_scale(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		return surface_get_hdr_output_linear_luminance_scale(surface);
	} else {
		return 0.0f;
	}
}

float RenderingContextDriver::window_get_output_max_linear_value(DisplayServer::WindowID p_window) const {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		if (surface_get_hdr_output_enabled(surface)) {
			return surface_get_hdr_output_max_value(surface);
		}
	}
	return 1.0f; // SDR
}

void RenderingContextDriver::window_destroy(DisplayServer::WindowID p_window) {
	SurfaceID surface = surface_get_from_window(p_window);
	if (surface) {
		surface_destroy(surface);
	}

	window_surface_map.erase(p_window);
}

String RenderingContextDriver::get_driver_and_device_memory_report() const {
	String report;

	const uint32_t num_tracked_obj_types = static_cast<uint32_t>(get_tracked_object_type_count());

	report += "=== Driver Memory Report ===";

	report += "\nLaunch with --extra-gpu-memory-tracking and build with "
			  "DEBUG_ENABLED for this functionality to work.";
	report += "\nDevice memory may be unavailable if the API does not support it"
			  "(e.g. VK_EXT_device_memory_report is unsupported).";
	report += "\n";

	report += "\nTotal Driver Memory:";
	report += String::num_real(double(get_driver_total_memory()) / (1024.0 * 1024.0));
	report += " MB";
	report += "\nTotal Driver Num Allocations: ";
	report += String::num_uint64(get_driver_allocation_count());

	report += "\nTotal Device Memory:";
	report += String::num_real(double(get_device_total_memory()) / (1024.0 * 1024.0));
	report += " MB";
	report += "\nTotal Device Num Allocations: ";
	report += String::num_uint64(get_device_allocation_count());

	report += "\n\nMemory use by object type (CSV format):";
	report += "\n\nCategory; Driver memory in MB; Driver Allocation Count; "
			  "Device memory in MB; Device Allocation Count";

	for (uint32_t i = 0u; i < num_tracked_obj_types; ++i) {
		report += "\n";
		report += get_tracked_object_name(i);
		report += ";";
		report += String::num_real(double(get_driver_memory_by_object_type(i)) / (1024.0 * 1024.0));
		report += ";";
		report += String::num_uint64(get_driver_allocs_by_object_type(i));
		report += ";";
		report += String::num_real(double(get_device_memory_by_object_type(i)) / (1024.0 * 1024.0));
		report += ";";
		report += String::num_uint64(get_device_allocs_by_object_type(i));
	}

	return report;
}

const char *RenderingContextDriver::get_tracked_object_name(uint32_t p_type_index) const {
	return "Tracking Unsupported by API";
}

uint64_t RenderingContextDriver::get_tracked_object_type_count() const {
	return 0;
}

uint64_t RenderingContextDriver::get_driver_total_memory() const {
	return 0;
}

uint64_t RenderingContextDriver::get_driver_allocation_count() const {
	return 0;
}

uint64_t RenderingContextDriver::get_driver_memory_by_object_type(uint32_t) const {
	return 0;
}

uint64_t RenderingContextDriver::get_driver_allocs_by_object_type(uint32_t) const {
	return 0;
}

uint64_t RenderingContextDriver::get_device_total_memory() const {
	return 0;
}

uint64_t RenderingContextDriver::get_device_allocation_count() const {
	return 0;
}

uint64_t RenderingContextDriver::get_device_memory_by_object_type(uint32_t) const {
	return 0;
}

uint64_t RenderingContextDriver::get_device_allocs_by_object_type(uint32_t) const {
	return 0;
}
