cvars

Author: illwieckz

src/engine/renderer/gl_shader.cpp

@@ -589,6 +589,16 @@ static std::string GenEngineConstants() {
 		AddConst( str, "r_RimExponent", r_rimExponent->value );
 	}
 
+	if ( r_cheapSRGB.Get() )
+	{
+		AddDefine( str, "r_cheapSRGB", 1 );
+	}
+
+	if ( r_linearBlending.Get() )
+	{
+		AddDefine( str, "r_linearBlending", 1 );
+	}
+
 	if ( r_showLightTiles->integer )
 	{
 		AddDefine( str, "r_showLightTiles", 1 );

src/engine/renderer/glsl_source/cameraEffects_fp.glsl

@@ -39,10 +39,12 @@ void	main()
 
 	vec4 original = texture2D(u_CurrentMap, st);
 
-	if (u_DelinearizeScreen == 1)
-	{
-		convertToSRGB(original.rgb);
-	}
+	#if defined(r_linearBlending)
+		if (u_DelinearizeScreen == 1)
+		{
+			convertToSRGB(original.rgb);
+		}
+	#endif
 
 	vec4 color = clamp(original, 0.0, 1.0);
 

src/engine/renderer/glsl_source/colorSpace_fp.glsl

@@ -1,7 +1,7 @@
 #define SRGB_NAIVE
 
 void convertFromSRGB(inout vec3 color) {
-#if defined(SRGB_CHEAP)
+#if defined(r_cheapSRGB)
 	float gamma = 2.2;
 	color = pow(color, vec3(gamma));
 
@@ -47,7 +47,7 @@ void convertFromSRGB(inout vec3 color) {
 }
 
 void convertToSRGB(inout vec3 color) {
-#if defined(SRGB_CHEAP)
+#if defined(r_cheapSRGB)
 	float gamma = 2.2;
 	color = pow(color, vec3(1/gamma));
 #elif defined(SRGB_NAIVE)

src/engine/renderer/glsl_source/generic_fp.glsl

@@ -48,7 +48,7 @@ void	main()
 	}
 #endif
 
-#if !defined(GENERIC_2D)
+#if !defined(GENERIC_2D) && defined(r_linearBlending)
 	if (u_LinearizeTexture == 1) {
 		convertFromSRGB(color.rgb);
 	}

src/engine/renderer/glsl_source/lightMapping_fp.glsl

@@ -205,6 +205,12 @@ void main()
 		color.rgb += glow;
 	#endif
 
+	#if !defined(r_linearBlending)
+		if (u_LinearizeTexture == 1) {
+			convertToSRGB(color.rgb);
+		}
+	#endif
+
 	outputColor = color;
 
 	// Debugging.

src/engine/renderer/tr_init.cpp

@@ -176,6 +176,10 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 	cvar_t      *r_halfLambertLighting;
 	cvar_t      *r_rimLighting;
 	cvar_t      *r_rimExponent;
+
+	Cvar::Cvar<bool> r_cheapSRGB("r_cheapSRGB", "use cheap sRGB computation when converting images", Cvar::NONE, false);
+	Cvar::Cvar<bool> r_linearBlending("r_linearBlending", "also blend framebuffers in linear space", Cvar::NONE, true);
+
 	cvar_t      *r_gamma;
 	cvar_t      *r_lockpvs;
 	cvar_t      *r_noportals;
@@ -1241,6 +1245,9 @@ ScreenshotCmd screenshotPNGRegistration("screenshotPNG", ssFormat_t::SSF_PNG, "p
 		r_rimExponent = Cvar_Get( "r_rimExponent", "3", CVAR_CHEAT | CVAR_LATCH );
 		AssertCvarRange( r_rimExponent, 0.5, 8.0, false );
 
+		Cvar::Latch( r_cheapSRGB );
+		Cvar::Latch( r_linearBlending );
+
 		r_drawBuffer = Cvar_Get( "r_drawBuffer", "GL_BACK", CVAR_CHEAT );
 		r_lockpvs = Cvar_Get( "r_lockpvs", "0", CVAR_CHEAT );
 		r_noportals = Cvar_Get( "r_noportals", "0", CVAR_CHEAT );

src/engine/renderer/tr_local.h

@@ -3022,6 +3022,9 @@ enum class deluxeMode_t { NONE, GRID, MAP };
 	extern cvar_t *r_rimLighting;
 	extern cvar_t *r_rimExponent;
 
+	extern Cvar::Cvar<bool> r_cheapSRGB;
+	extern Cvar::Cvar<bool> r_linearBlending;
+
 	extern cvar_t *r_logFile; // number of frames to emit GL logs
 
 	extern cvar_t *r_clear; // force screen clear every frame