cgame.cpp

/*
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*/

#include "common/Common.h"
#include "engine/client/cg_msgdef.h"

#include "shared/VMMain.h"
#include "shared/CommandBufferClient.h"
#include "shared/CommonProxies.h"
#include "shared/client/cg_api.h"

static bool mapLoaded;
static vec3_t viewAngles;
static refdef_t refdef;

// Unvanquished default
static Cvar::Cvar<float> dg_fovY("dg_fovY", "vertical field of view (degrees)", Cvar::NONE, 73.739792);
// Unvanquished default at 4:3 aspect ratio
static Cvar::Cvar<float> dg_fovX("dg_fovX", "horizontal field of view (degrees)", Cvar::NONE, 90);

static Cvar::Cvar<int> dg_timeInitial(
	"dg_timeInitial", "time to use for first frame of rendering", Cvar::NONE, 0);

// There is no server time, and the client doesn't tell us what time it has
static void UpdateTime()
{
	static int lastTime;
	if (refdef.time == 0)
		refdef.time = dg_timeInitial.Get();
	int time = Sys::Milliseconds();
	int fixedFrame;
	if (Str::ParseInt(fixedFrame, Cvar::GetValue("common.fixedFrameTime")) && fixedFrame > 0) {
		refdef.time += fixedFrame;
	} else {
		float timescale = 1;
		Str::ToFloat(Cvar::GetValue("timescale"), timescale);
		refdef.time += std::max<int>(1, timescale * (time - lastTime));
	}
	lastTime = time;
}

void VM::VMHandleSyscall(uint32_t id, Util::Reader reader) {
	int major = id >> 16;
	int minor = id & 0xffff;
	if (major == VM::QVM) {
		switch (minor) {
		case CG_STATIC_INIT:
			IPC::HandleMsg<CGameStaticInitMsg>(VM::rootChannel, std::move(reader), [] (int milliseconds) {
				VM::InitializeProxies(milliseconds);
				FS::Initialize();
				cmdBuffer.Init();
			});
			break;

		case CG_ROCKET_VM_INIT:
			IPC::HandleMsg<CGameRocketInitMsg>(VM::rootChannel, std::move(reader), [] (const WindowConfig& gl) {
				refdef.width = gl.vidWidth;
				refdef.height = gl.vidHeight;
			});
			break;

		case CG_ROCKET_FRAME:
			IPC::HandleMsg<CGameRocketFrameMsg>(VM::rootChannel, std::move(reader), [] (const cgClientState_t&) {
				if (mapLoaded) {
					refdef.fov_x = dg_fovX.Get();
					refdef.fov_y = dg_fovY.Get();
					AnglesToAxis(viewAngles, refdef.viewaxis);
					UpdateTime();
					trap_R_RenderScene(&refdef);
				} else {
					trap_R_SetColor(Color::MdGrey);
					static qhandle_t h = trap_R_RegisterShader("white", RSF_DEFAULT);
					trap_R_DrawStretchPic(0, 0, refdef.width, refdef.height, 0, 0, 1, 1, h);
				}

				cmdBuffer.TryFlush();
			});
			break;

		case CG_KEY_DOWN_EVENT: // only engine->cgame call with a reply
			IPC::HandleMsg<CGameKeyDownEventMsg>(VM::rootChannel, std::move(reader), [] (Keyboard::Key, bool, bool& consumed) {
				consumed = false;
			});
			break;

		default:
			{
				Util::Writer writer;
				writer.Write<uint32_t>(IPC::ID_RETURN);
				VM::rootChannel.SendMsg(writer);
			}
			break;
		}
	} else if (major < VM::LAST_COMMON_SYSCALL) {
		VM::HandleCommonSyscall(major, minor, std::move(reader), VM::rootChannel);
	} else {
		Sys::Drop("unhandled VM major syscall number %i", major);
	}
}

class LoadMapCmd : public Cmd::StaticCmd
{
public:
	LoadMapCmd() : StaticCmd("loadmap", "load a map for viewing") {}

	void Run(const Cmd::Args& args) const override
	{
		if (args.Argc() == 2) {
			const FS::PakInfo* pak = FS::FindPak("map-" + args.Argv(1));
			if (!pak) {
				Print("map %s not found", args.Argv(1));
				return;
			}

			if (mapLoaded) {
				// need to restart FS
				trap_SendConsoleCommand(Str::Format(
					"disconnect\nloadmap %s", Cmd::Escape(args.Argv(1))).c_str());
			} else {
				FS::PakPath::LoadPak(*pak);
				// need to restart renderer because shader scanning was done earlier, but
				// WITHOUT restarting the filesystem
				trap_SendConsoleCommand(Str::Format(
					"vid_restart\nloadmap -restarted %s", Cmd::Escape(args.Argv(1))).c_str());
			}
		} else if (args.Argc() == 3 && Str::IsIEqual(args.Argv(1), "-restarted")) {
			// All layers of the color grade image are pre-populated with a neutral cgrade when
			// the renderer starts (though there is no way to get it back later)
			refdef.gradingWeights[0] = 1.0f;

			trap_R_LoadWorldMap(("maps/" + args.Argv(2) + ".bsp").c_str());

			// This is done by EndRegistration but there is no way to invoke that
			bool reflection;
			if (Cvar::ParseCvarValue(Cvar::GetValue("r_reflectionMapping"), reflection)
			    && reflection) {
				trap_SendConsoleCommand("buildcubemaps");
			}

			mapLoaded = true;
		} else {
			PrintUsage(args, "<map name>");
		}
	}
};
static LoadMapCmd loadmapRegistration;

class SetViewPosCmd : public Cmd::StaticCmd
{
public:
	SetViewPosCmd() : StaticCmd("setviewpos", "set viewing position & angle") {}

	void Run(const Cmd::Args& args) const override
	{
		if (args.Argc() < 2 || args.Argc() > 7) {
			PrintUsage(args, "x y z yaw pitch roll",
				"All arguments are optional. '-' can be used instead of a number to not set one.");
			return;
		}

		// Although PITCH is 0 and YAW is 1, we use the order yaw,pitch,roll which matches
		// Unvanquished, and is also the order the rotations are actually applied in
		float* values[6] { refdef.vieworg + 0, refdef.vieworg + 1, refdef.vieworg + 2,
		                   viewAngles + YAW, viewAngles + PITCH, viewAngles + ROLL };

		for (int i = 0; i < args.Argc() - 1; i++) {
			if (args.Argv(i + 1) != "-" && !Str::ToFloat(args.Argv(i + 1), *values[i])) {
				Print("invalid number '%s'", args.Argv(i + 1));
			}
		}
	}
};
static SetViewPosCmd setviewposRegistration;

bool ConsoleCommand()
{
	ASSERT_UNREACHABLE();
}
void CompleteCommand(int)
{
	ASSERT_UNREACHABLE();
}

void VM::GetNetcodeTables(NetcodeTable&, int&)
{
	Sys::Drop("GetNetcodeTables not implemented");
}