From ff3a57ae8a2a446664173314b6e89de4713a4e1b Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Mon, 13 Apr 2026 13:15:04 +0500
Subject: [PATCH] ref: gl: drop legacy mirror viewpass code

---
 ref/gl/gl_local.h  |  9 +++------
 ref/gl/gl_rmain.c  | 35 +++++++----------------------------
 ref/gl/gl_rsurf.c  |  2 +-
 ref/gl/gl_sprite.c |  2 +-
 4 files changed, 12 insertions(+), 36 deletions(-)

diff --git a/ref/gl/gl_local.h b/ref/gl/gl_local.h
index b4ac9294..4b8cb8a1 100644
--- a/ref/gl/gl_local.h
+++ b/ref/gl/gl_local.h
@@ -71,16 +71,13 @@ void VGL_ShimEndFrame( void );
 #define DEFAULT_ALPHATEST	0.0f
 
 // refparams
-#define RP_NONE		0
-#define RP_ENVVIEW		BIT( 0 )	// used for cubemapshot
-#define RP_OLDVIEWLEAF	BIT( 1 )
-#define RP_CLIPPLANE	BIT( 2 )
+#define RP_NONE    0
+#define RP_ENVVIEW BIT( 0 )	// used for cubemapshot
 
-#define RP_NONVIEWERREF	(RP_ENVVIEW)
 #define R_ModelOpaque( rm )	( rm == kRenderNormal )
 #define R_StaticEntity( ent )	( VectorIsNull( ent->origin ) && VectorIsNull( ent->angles ))
 #define RP_LOCALCLIENT( e )	((e) != NULL && (e)->index == ( gp_cl->playernum + 1 ) && e->player )
-#define RP_NORMALPASS()	( FBitSet( RI.params, RP_NONVIEWERREF ) == 0 )
+#define RP_NORMALPASS()	( FBitSet( RI.params, RP_ENVVIEW ) == 0 )
 
 #define CL_IsViewEntityLocalPlayer() ( gp_cl->viewentity == ( gp_cl->playernum + 1 ))
 
diff --git a/ref/gl/gl_rmain.c b/ref/gl/gl_rmain.c
index 8572e369..b5eb6e99 100644
--- a/ref/gl/gl_rmain.c
+++ b/ref/gl/gl_rmain.c
@@ -583,20 +583,6 @@ void R_SetupGL( qboolean set_gl_state )
 	pglMatrixMode( GL_MODELVIEW );
 	GL_LoadMatrix( RI.worldviewMatrix );
 
-	if( FBitSet( RI.params, RP_CLIPPLANE ))
-	{
-		GLdouble	clip[4];
-		mplane_t	*p = &RI.clipPlane;
-
-		clip[0] = p->normal[0];
-		clip[1] = p->normal[1];
-		clip[2] = p->normal[2];
-		clip[3] = -p->dist;
-
-		pglClipPlane( GL_CLIP_PLANE0, clip );
-		pglEnable( GL_CLIP_PLANE0 );
-	}
-
 	GL_Cull( GL_FRONT );
 
 	pglDisable( GL_BLEND );
@@ -604,17 +590,6 @@ void R_SetupGL( qboolean set_gl_state )
 	pglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
 }
 
-/*
-=============
-R_EndGL
-=============
-*/
-static void R_EndGL( void )
-{
-	if( RI.params & RP_CLIPPLANE )
-		pglDisable( GL_CLIP_PLANE0 );
-}
-
 /*
 =============
 R_RecursiveFindWaterTexture
@@ -1019,8 +994,6 @@ void R_RenderScene( void )
 	R_DrawEntitiesOnList();
 
 	R_DrawWaterSurfaces();
-
-	R_EndGL();
 }
 
 void R_GammaChanged( qboolean do_reset_gamma )
@@ -1115,8 +1088,14 @@ void R_SetupRefParams( const ref_viewpass_t *rvp )
 	RI.farClip = 0;
 
 	if( !FBitSet( rvp->flags, RF_DRAW_CUBEMAP ))
+	{
 		RI.drawOrtho = FBitSet( rvp->flags, RF_DRAW_OVERVIEW );
-	else RI.drawOrtho = false;
+	}
+	else
+	{
+		SetBits( RI.params, RP_ENVVIEW );
+		RI.drawOrtho = false;
+	}
 
 	// setup viewport
 	RI.viewport[0] = rvp->viewport[0];
diff --git a/ref/gl/gl_rsurf.c b/ref/gl/gl_rsurf.c
index 67d6d6ad..5d9247dc 100644
--- a/ref/gl/gl_rsurf.c
+++ b/ref/gl/gl_rsurf.c
@@ -3787,7 +3787,7 @@ void R_MarkLeaves( void )
 	if( r_novis.value || RI.drawOrtho || !RI.viewleaf || !WORLDMODEL->visdata )
 		novis = true;
 
-	gEngfuncs.R_FatPVS( RI.pvsorigin, r_pvs_radius->value, RI.visbytes, FBitSet( RI.params, RP_OLDVIEWLEAF ), novis );
+	gEngfuncs.R_FatPVS( RI.pvsorigin, r_pvs_radius->value, RI.visbytes, false, novis );
 	if( force && !novis )
 		gEngfuncs.R_FatPVS( test, r_pvs_radius->value, RI.visbytes, true, novis );
 
diff --git a/ref/gl/gl_sprite.c b/ref/gl/gl_sprite.c
index 48b51767..ecb2a6c2 100644
--- a/ref/gl/gl_sprite.c
+++ b/ref/gl/gl_sprite.c
@@ -386,7 +386,7 @@ void R_DrawSpriteModel( cl_entity_t *e )
 	vec3_t		v_forward, v_right, v_up;
 	vec3_t		origin, color, color2 = { 0.0f };
 
-	if( RI.params & RP_ENVVIEW )
+	if( FBitSet( RI.params, RP_ENVVIEW ))
 		return;
 
 	model = e->model;