From 3cd866f834d068f34b547e10600e226feb9055cd Mon Sep 17 00:00:00 2001
From: Mikko Kokko <kokon.mikko@gmail.com>
Date: Fri, 7 Apr 2023 13:14:07 +0300
Subject: [PATCH] check HIDEHUD_CROSSHAIR before drawing crosshair

---
 csldr/cdll_int.c      |  5 +++++
 csldr/export.c        |  4 ++--
 csldr/hud_crosshair.c | 38 +++++++++++++++++++++++++++++++++-----
 csldr/hud_crosshair.h |  4 ++++
 4 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/csldr/cdll_int.c b/csldr/cdll_int.c
index 99db767..db6cdd7 100644
--- a/csldr/cdll_int.c
+++ b/csldr/cdll_int.c
@@ -41,6 +41,11 @@ static int Hk_HookUserMsg(const char *szMsgName, pfnUserMsgHook pfn)
 		Og_MsgFunc_CurWeapon = pfn;
 		hook = Hk_MsgFunc_CurWeapon;
 	}
+	else if (!strcmp(szMsgName, "HideWeapon"))
+	{
+		Og_MsgFunc_HideWeapon = pfn;
+		hook = Hk_MsgFunc_HideWeapon;
+	}
 
 	return gEngfuncs.pfnHookUserMsg(szMsgName, hook);
 }
diff --git a/csldr/export.c b/csldr/export.c
index 9ea9012..fdacb46 100644
--- a/csldr/export.c
+++ b/csldr/export.c
@@ -232,8 +232,8 @@ EXPORT int HUD_UpdateClientData(client_data_t *pcldata, float flTime)
 
 EXPORT int HUD_VidInit(void)
 {
-	/* pass through */
-	return cl_funcs.pHudVidInitFunc();
+	/* hooked */
+	return Hk_HudVidInit();
 }
 
 EXPORT void HUD_VoiceStatus(int entindex, qboolean bTalking)
diff --git a/csldr/hud_crosshair.c b/csldr/hud_crosshair.c
index 92a9239..8837750 100644
--- a/csldr/hud_crosshair.c
+++ b/csldr/hud_crosshair.c
@@ -1,5 +1,10 @@
 #include "pch.h"
 
+/* mikkotodo: other flags can hide the crosshair as well, however
+the way those work is more complicated than just checking the flag
+before drawing the crosshair */
+#define HIDEHUD_CROSSHAIR (1 << 6)
+
 bool can_xhair;
 
 cvar_t *xhair_enable;
@@ -21,20 +26,29 @@ cvar_t *cl_crosshair_translucent;
 cvar_t *hud_draw;
 
 int currentWeaponId;
+static int hideHudFlags;
 
 int (*Og_MsgFunc_CurWeapon)(const char *pszName, int iSize, void *pbuf);
 
-int Hk_MsgFunc_CurWeapon(const char *name, int size, void *data)
+int Hk_MsgFunc_CurWeapon(const char *pszName, int iSize, void *pbuf)
 {
-	int state = ((byte *)data)[0];
-	int weaponId = ((char *)data)[1];
+	int state = ((byte *)pbuf)[0];
+	int weaponId = ((char *)pbuf)[1];
 
 	if (weaponId < 1)
 		currentWeaponId = 0;
 	else if (state)
 		currentWeaponId = weaponId;
 
-	return Og_MsgFunc_CurWeapon(name,size,data);
+	return Og_MsgFunc_CurWeapon(pszName, iSize, pbuf);
+}
+
+int (*Og_MsgFunc_HideWeapon)(const char *pszName, int iSize, void *pbuf);
+
+int Hk_MsgFunc_HideWeapon(const char *pszName, int iSize, void *pbuf)
+{
+	hideHudFlags = ((byte *)pbuf)[0];
+	return Og_MsgFunc_HideWeapon(pszName, iSize, pbuf);
 }
 
 void HudInit(void)
@@ -207,8 +221,14 @@ int Hk_HudRedraw(float time, int intermission)
 	float old_trans;
 	char old_color[2];
 
-	if (!isOpenGL || !can_xhair || !xhair_enable->value || (hud_draw && !hud_draw->value))
+	if (!isOpenGL
+		|| !can_xhair
+		|| !xhair_enable->value
+		|| (hud_draw && !hud_draw->value)
+		|| (hideHudFlags & HIDEHUD_CROSSHAIR))
+	{
 		return cl_funcs.pHudRedrawFunc(time, intermission);
+	}
 
 	/*  stupid hack, the memory is always writable though */
 	color_str = (char *)cl_crosshair_color->string;
@@ -235,3 +255,11 @@ int Hk_HudRedraw(float time, int intermission)
 
 	return 1;
 }
+
+int Hk_HudVidInit(void)
+{
+	currentWeaponId = 0;
+	hideHudFlags = 0;
+
+	return cl_funcs.pHudVidInitFunc();
+}
diff --git a/csldr/hud_crosshair.h b/csldr/hud_crosshair.h
index f369922..f020ac9 100644
--- a/csldr/hud_crosshair.h
+++ b/csldr/hud_crosshair.h
@@ -3,5 +3,9 @@ extern int currentWeaponId;
 extern int (*Og_MsgFunc_CurWeapon)(const char *pszName, int iSize, void *pbuf);
 int Hk_MsgFunc_CurWeapon(const char *pszName, int iSize, void *pbuf);
 
+extern int (*Og_MsgFunc_HideWeapon)(const char *pszName, int iSize, void *pbuf);
+int Hk_MsgFunc_HideWeapon(const char *pszName, int iSize, void *pbuf);
+
 void HudInit(void);
 int Hk_HudRedraw(float time, int intermission);
+int Hk_HudVidInit(void);