iw6-mod/src/client/component/fps.cpp

#include <std_include.hpp>
#include "loader/component_loader.hpp"
#include "scheduler.hpp"

#include "game/game.hpp"
#include "game/dvars.hpp"

#include <utils/hook.hpp>
#include <utils/string.hpp>

namespace fps
{
	namespace
	{
		const game::dvar_t* cg_drawFPS;
		const game::dvar_t* cg_drawPing;

		float fps_color[4] = {0.6f, 1.0f, 0.0f, 1.0f};
		float origin_color[4] = {1.0f, 0.67f, 0.13f, 1.0f};
		float ping_color[4] = {1.0f, 1.0f, 1.0f, 0.65f};

		struct cg_perf_data
		{
			std::chrono::time_point<std::chrono::steady_clock> perf_start;
			std::int32_t current_ms{};
			std::int32_t previous_ms{};
			std::int32_t frame_ms{};
			std::int32_t history[32]{};
			std::int32_t count{};
			std::int32_t index{};
			std::int32_t instant{};
			std::int32_t total{};
			float average{};
			float variance{};
			std::int32_t min{};
			std::int32_t max{};
		};

		cg_perf_data cg_perf = cg_perf_data();

		void perf_calc_fps(cg_perf_data* data, const std::int32_t value)
		{
			data->history[data->index % 32] = value;
			data->instant = value;
			data->min = std::numeric_limits<int>::max();
			data->max = 0;
			data->average = 0.0f;
			data->variance = 0.0f;
			data->total = 0;

			for (auto i = 0; i < data->count; ++i)
			{
				const std::int32_t idx = (data->index - i) % 32;

				if (idx < 0)
				{
					break;
				}

				data->total += data->history[idx];

				if (data->min > data->history[idx])
				{
					data->min = data->history[idx];
				}

				if (data->max < data->history[idx])
				{
					data->max = data->history[idx];
				}
			}

			data->average = static_cast<float>(data->total) / static_cast<float>(data->count);
			++data->index;
		}

		void perf_update()
		{
			cg_perf.count = 32;

			cg_perf.current_ms = static_cast<std::int32_t>(std::chrono::duration_cast<std::chrono::milliseconds>(
				std::chrono::high_resolution_clock::now() - cg_perf.perf_start).count());
			cg_perf.frame_ms = cg_perf.current_ms - cg_perf.previous_ms;
			cg_perf.previous_ms = cg_perf.current_ms;

			perf_calc_fps(&cg_perf, cg_perf.frame_ms);

			utils::hook::invoke<void>(SELECT_VALUE(0x1405806E0, 0x140658E30));
		}

		void cg_draw_fps()
		{
			if (cg_drawFPS && cg_drawFPS->current.integer != 0)
			{
				const auto fps = static_cast<std::int32_t>(static_cast<float>(1000.0f /
					static_cast<float>(cg_perf.average)) + 9.313225746154785e-10);

				auto* font = game::R_RegisterFont("fonts/normalfont");
				if (!font) return;

				const auto* const fps_string = utils::string::va("%i", fps);

				const auto scale = 1.0f;

				const auto x = (game::ScrPlace_GetViewPlacement()->realViewportSize[0] - 10.0f) - game::R_TextWidth(
					fps_string, std::numeric_limits<int>::max(), font) * scale;

				const auto y = font->pixelHeight * 1.2f;

				game::R_AddCmdDrawText(fps_string, std::numeric_limits<int>::max(), font, x, y, scale, scale, 0.0f, fps_color, 6);

				if (game::mp::g_entities && cg_drawFPS->current.integer > 1 && game::SV_Loaded())
				{
					const auto* const origin_string = utils::string::va("%f, %f, %f",
					                                                    game::mp::g_entities[0].client->ps.origin[0] *
					                                                    1.0,
					                                                    game::mp::g_entities[0].client->ps.origin[1] *
					                                                    1.0,
					                                                    game::mp::g_entities[0].client->ps.origin[2] *
					                                                    1.0);
					const auto origin_x = (game::ScrPlace_GetViewPlacement()->realViewportSize[0] - 10.0f) -
						game::R_TextWidth(origin_string, std::numeric_limits<int>::max(), font) * scale;
					game::R_AddCmdDrawText(origin_string, std::numeric_limits<int>::max(), font, origin_x, y + 50, scale, scale, 0.0f,
					                       origin_color, 6);
				}
			}
		}

		void cg_draw_ping()
		{
			if (cg_drawPing->current.integer != 0 && game::CL_IsCgameInitialized())
			{
				const auto ping = *reinterpret_cast<int*>(0x1419E5100);

				auto* font = game::R_RegisterFont("fonts/normalfont");
				if (!font) return;

				auto* const ping_string = utils::string::va("Ping: %i", ping);

				const auto scale = 1.0f;

				const auto x = (game::ScrPlace_GetViewPlacement()->realViewportSize[0] - 375.0f) - game::R_TextWidth(
					ping_string, 0x7FFFFFFF, font) * scale;

				const auto y = font->pixelHeight * 1.2f;

				game::R_AddCmdDrawText(ping_string, std::numeric_limits<int>::max(), font, x, y, scale, scale, 0.0f, ping_color, 6);
			}
		}

		const game::dvar_t* cg_draw_fps_register_stub(const char* dvar_name, const char** value_list, const int default_index, unsigned int /*flags*/, const char* description)
		{
			cg_drawFPS = game::Dvar_RegisterEnum(dvar_name, value_list, default_index, game::DVAR_FLAG_SAVED, description);
			return cg_drawFPS;
		}
	}

	class component final : public component_interface
	{
	public:
		void post_unpack() override
		{
			if (game::environment::is_dedi())
			{
				return;
			}

			// fps setup
			cg_perf.perf_start = std::chrono::high_resolution_clock::now();
			utils::hook::call(SELECT_VALUE(0x140242C11, 0x1402CF457), &perf_update);

			// change cg_drawfps flags to saved
			utils::hook::call(SELECT_VALUE(0x1401F400A, 0x140272B98), &cg_draw_fps_register_stub);

			cg_drawPing = game::Dvar_RegisterInt("cg_drawPing", 0, 0, 1, game::DVAR_FLAG_SAVED, "Draw ping");

			scheduler::loop(cg_draw_fps, scheduler::pipeline::renderer);
			scheduler::loop(cg_draw_ping, scheduler::pipeline::renderer);
		}
	};
}

REGISTER_COMPONENT(fps::component)