Rename ColorAdd to AddColor, and use it ingame

Rename ColorAdd to AddColor
Add AddColor to FRenderState
Tweak SpecialColors array in ZScript to include the additive color
Add uAddColor to the shader compiler
Add uAddColor to the texel

src/gl/renderer/gl_renderstate.cpp

@@ -145,6 +145,7 @@ bool FGLRenderState::ApplyShader()
 	activeShader->muLightIndex.Set(-1);
 	activeShader->muClipSplit.Set(mClipSplit);
 	activeShader->muSpecularMaterial.Set(mGlossiness, mSpecularLevel);
+	activeShader->muAddColor.Set(mAddColor); // Can this be done without a shader?
 
 	if (mGlowEnabled)
 	{

src/gl/shaders/gl_shader.cpp

@@ -241,6 +241,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 	i_data += "uniform vec4 uObjectColor;\n";
 	i_data += "uniform vec4 uObjectColor2;\n";
 	i_data += "uniform vec4 uDynLightColor;\n";
+	i_data += "uniform vec4 uAddColor;\n";
 	i_data += "uniform vec4 uFogColor;\n";
 	i_data += "uniform float uDesaturationFactor;\n";
 	i_data += "uniform float uInterpolationFactor;\n";
@@ -534,6 +535,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 	muInterpolationFactor.Init(hShader, "uInterpolationFactor");
 	muAlphaThreshold.Init(hShader, "uAlphaThreshold");
 	muSpecularMaterial.Init(hShader, "uSpecularMaterial");
+	muAddColor.Init(hShader, "uAddColor");
 	muTimer.Init(hShader, "timer");
 
 	lights_index = glGetUniformLocation(hShader, "lights");

src/gl/shaders/gl_shader.h

@@ -245,6 +245,7 @@ class FShader
 	FBufferedUniform4f muDynLightColor;
 	FBufferedUniformPE muObjectColor;
 	FBufferedUniformPE muObjectColor2;
+	FBufferedUniformPE muAddColor;
 	FUniform4f muGlowBottomColor;
 	FUniform4f muGlowTopColor;
 	FUniform4f muGlowBottomPlane;

src/hwrenderer/scene/hw_drawstructs.h

@@ -300,6 +300,7 @@ public:
 
 	FColormap Colormap;	// light and fog
 	PalEntry FlatColor;
+	PalEntry AddColor;
 	ERenderStyle renderstyle;
 
 	float alpha;

src/hwrenderer/scene/hw_flats.cpp

@@ -307,6 +307,7 @@ void GLFlat::DrawFlat(HWDrawInfo *di, FRenderState &state, bool translucent)
 	state.SetColor(lightlevel, rel, di->isFullbrightScene(), Colormap, alpha);
 	state.SetFog(lightlevel, rel, di->isFullbrightScene(), &Colormap, false);
 	state.SetObjectColor(FlatColor | 0xff000000);
+	state.SetAddColor(AddColor | 0xff000000);
 
 	if (hacktype & SSRF_PLANEHACK)
 	{
@@ -357,6 +358,7 @@ void GLFlat::DrawFlat(HWDrawInfo *di, FRenderState &state, bool translucent)
 		state.SetRenderStyle(DefaultRenderStyle());
 		state.SetObjectColor(0xffffffff);
 	}
+	state.SetAddColor(0);
 }
 
 //==========================================================================
@@ -441,16 +443,18 @@ void GLFlat::SetFrom3DFloor(F3DFloor *rover, bool top, bool underside)
 	// FF_FOG requires an inverted logic where to get the light from
 	lightlist_t *light = P_GetPlaneLight(sector, plane.plane, underside);
 	lightlevel = hw_ClampLight(*light->p_lightlevel);
-	
+
 	if (rover->flags & FF_FOG)
 	{
 		Colormap.LightColor = light->extra_colormap.FadeColor;
 		FlatColor = 0xffffffff;
+		AddColor = 0;
 	}
 	else
 	{
 		Colormap.CopyFrom3DLight(light);
 		FlatColor = *plane.flatcolor;
+		// AddColor = sector->SpecialColors[sector_t::add];
 	}
 
 
@@ -505,6 +509,7 @@ void GLFlat::ProcessSector(HWDrawInfo *di, sector_t * frontsector, int which)
 		lightlevel = hw_ClampLight(frontsector->GetFloorLight());
 		Colormap = frontsector->Colormap;
 		FlatColor = frontsector->SpecialColors[sector_t::floor];
+		AddColor = frontsector->SpecialColors[sector_t::add];
 		port = frontsector->ValidatePortal(sector_t::floor);
 		if ((stack = (port != NULL)))
 		{
@@ -560,6 +565,7 @@ void GLFlat::ProcessSector(HWDrawInfo *di, sector_t * frontsector, int which)
 		lightlevel = hw_ClampLight(frontsector->GetCeilingLight());
 		Colormap = frontsector->Colormap;
 		FlatColor = frontsector->SpecialColors[sector_t::ceiling];
+		AddColor = frontsector->SpecialColors[sector_t::add];
 		port = frontsector->ValidatePortal(sector_t::ceiling);
 		if ((stack = (port != NULL)))
 		{

src/hwrenderer/scene/hw_renderstate.h

@@ -144,11 +144,12 @@ protected:
 	float mInterpolationFactor;
 
 	FStateVec4 mNormal;
-	FStateVec4 mColor, mColorAdd;
+	FStateVec4 mColor;
 	FStateVec4 mGlowTop, mGlowBottom;
 	FStateVec4 mGlowTopPlane, mGlowBottomPlane;
 	FStateVec4 mGradientTopPlane, mGradientBottomPlane;
 	FStateVec4 mSplitTopPlane, mSplitBottomPlane;
+	PalEntry mAddColor;
 	PalEntry mFogColor;
 	PalEntry mObjectColor;
 	PalEntry mObjectColor2;
@@ -181,6 +182,7 @@ public:
 		mModelMatrixEnabled = false;
 		mTextureMatrixEnabled = false;
 		mSplitEnabled = false;
+		mAddColor = 0;
 		mObjectColor = 0xffffffff;
 		mObjectColor2 = 0;
 		mSoftLight = 0;
@@ -369,6 +371,11 @@ public:
 		mObjectColor2 = pe;
 	}
 
+	void SetAddColor(PalEntry pe)
+	{
+		mAddColor = pe;
+	}
+
 	void SetFog(PalEntry c, float d)
 	{
 		const float LOG2E = 1.442692f;	// = 1/log(2)

src/hwrenderer/utility/hw_draw2d.cpp

@@ -203,6 +203,7 @@ void Draw2D(F2DDrawer *drawer, FRenderState &state)
 		}
 		state.SetObjectColor(0xffffffff);
 		state.SetObjectColor2(0);
+		state.SetAddColor(0);
 		state.EnableTextureMatrix(false);
 		state.SetEffect(EFF_NONE);
 

src/p_saveg.cpp

@@ -293,7 +293,7 @@ FSerializer &Serialize(FSerializer &arc, const char *key, sector_t &p, sector_t
 			("linked_floor", p.e->Linked.Floor.Sectors)
 			("linked_ceiling", p.e->Linked.Ceiling.Sectors)
 			("colormap", p.Colormap, def->Colormap)
-			.Array("specialcolors", p.SpecialColors, def->SpecialColors, 5, true)
+			.Array("specialcolors", p.SpecialColors, def->SpecialColors, 6, true)
 			("gravity", p.gravity, def->gravity)
 			.Terrain("floorterrain", p.terrainnum[0], &def->terrainnum[0])
 			.Terrain("ceilingterrain", p.terrainnum[1], &def->terrainnum[1])

wadsrc/static/shaders/glsl/main.fp

@@ -114,6 +114,8 @@ vec4 getTexel(vec2 st)
 	if (uObjectColor2.a == 0.0) texel *= uObjectColor;
 	else texel *= mix(uObjectColor, uObjectColor2, gradientdist.z);
 
+	texel += uAddColor;
+
 	return desaturate(texel);
 }
 

wadsrc/static/zscript/mapdata.txt

@@ -235,7 +235,7 @@ struct Sector native play
 {
 
 	native readonly FColormap 	ColorMap;
-	native readonly Color		SpecialColors[5];
+	native readonly Color		SpecialColors[6];
 
 	native Actor 		SoundTarget;