- r_vanillatrans: Cache the cache! Transform the function into a global variable and recheck at the start of D_Display

src/d_main.cpp

@@ -670,6 +670,8 @@ void D_Display ()
 	cycles.Reset();
 	cycles.Clock();
 
+	r_UseVanillaTransparency = UseVanillaTransparency(); // [SP] Cache UseVanillaTransparency() call
+
 	if (players[consoleplayer].camera == NULL)
 	{
 		players[consoleplayer].camera = players[consoleplayer].mo;

src/gl/scene/gl_sprite.cpp

@@ -993,7 +993,7 @@ void GLSprite::Process(AActor* thing, sector_t * sector, int thruportal)
 	{
 		trans = 1.f;
 	}
-	if (UseVanillaTransparency())
+	if (r_UseVanillaTransparency)
 	{
 		// [SP] "canonical transparency" - with the flip of a CVar, disable transparency for Doom objects,
 		//   and disable 'additive' translucency for certain objects from other games.

src/polyrenderer/scene/poly_sprite.cpp

@@ -146,7 +146,7 @@ void RenderPolySprite::Render(const TriMatrix &worldToClip, const PolyClipPlane
 	args.SetStencilTestValue(stencilValue);
 	args.SetWriteStencil(true, stencilValue);
 	args.SetClipPlane(clipPlane);
-	if ((thing->renderflags & RF_ZDOOMTRANS) && UseVanillaTransparency())
+	if ((thing->renderflags & RF_ZDOOMTRANS) && r_UseVanillaTransparency)
 		args.SetStyle(LegacyRenderStyles[STYLE_Normal], 1.0f, thing->fillcolor, thing->Translation, tex, fullbrightSprite);
 	else
 		args.SetStyle(thing->RenderStyle, thing->Alpha, thing->fillcolor, thing->Translation, tex, fullbrightSprite);

src/r_data/r_vanillatrans.cpp

@@ -32,6 +32,7 @@
 #include "c_dispatch.h"
 #endif
 
+bool r_UseVanillaTransparency;
 CVAR (Int, r_vanillatrans, 2, CVAR_ARCHIVE)
 
 namespace

src/r_data/r_vanillatrans.h

@@ -23,3 +23,4 @@
 
 void UpdateVanillaTransparency();
 bool UseVanillaTransparency();
+extern bool r_UseVanillaTransparency;

src/swrenderer/things/r_sprite.cpp

@@ -213,7 +213,7 @@ namespace swrenderer
 		if (thing->flags5 & MF5_BRIGHT)
 			vis->renderflags |= RF_FULLBRIGHT; // kg3D
 		vis->RenderStyle = thing->RenderStyle;
-		if (UseVanillaTransparency())
+		if (r_UseVanillaTransparency)
 		{
 			if (thing->renderflags & RF_ZDOOMTRANS)
 				vis->RenderStyle = LegacyRenderStyles[STYLE_Normal];