Add linearBlending/naiveBlending to expression_t

Author: slipher

src/engine/renderer/tr_local.h

@@ -745,6 +745,8 @@ enum class ssaoMode {
 	  OP_GLOBAL5,
 	  OP_GLOBAL6,
 	  OP_GLOBAL7,
+	  OP_NAIVE_BLENDING,
+	  OP_LINEAR_BLENDING,
 	  OP_FRAGMENTSHADERS,
 	  OP_FRAMEBUFFEROBJECTS,
 	  OP_SOUND,

src/engine/renderer/tr_shade_calc.cpp

@@ -176,6 +176,14 @@ static float GetOpValue( const expOperation_t *op )
 			value = 1.0;
 			break;
 
+		case opcode_t::OP_NAIVE_BLENDING:
+			value = float( !tr.worldLinearizeTexture );
+			break;
+
+		case opcode_t::OP_LINEAR_BLENDING:
+			value = float( tr.worldLinearizeTexture );
+			break;
+
 		case opcode_t::OP_FRAGMENTSHADERS:
 			value = 1.0;
 			break;
@@ -272,6 +280,8 @@ static float EvalExpression( const expression_t *exp, float defaultValue )
 			case opcode_t::OP_GLOBAL5:
 			case opcode_t::OP_GLOBAL6:
 			case opcode_t::OP_GLOBAL7:
+			case opcode_t::OP_NAIVE_BLENDING:
+			case opcode_t::OP_LINEAR_BLENDING:
 			case opcode_t::OP_FRAGMENTSHADERS:
 			case opcode_t::OP_FRAMEBUFFEROBJECTS:
 			case opcode_t::OP_SOUND:

src/engine/renderer/tr_shader.cpp

@@ -275,6 +275,8 @@ const opstring_t opStrings[] = {
 	{"global5",            opcode_t::OP_GLOBAL5},
 	{"global6",            opcode_t::OP_GLOBAL6},
 	{"global7",            opcode_t::OP_GLOBAL7},
+	{"naiveBlending",      opcode_t::OP_NAIVE_BLENDING},
+	{"linearBlending",     opcode_t::OP_LINEAR_BLENDING},
 	{"fragmentShaders",    opcode_t::OP_FRAGMENTSHADERS},
 	{"frameBufferObjects", opcode_t::OP_FRAMEBUFFEROBJECTS},
 	{"sound",              opcode_t::OP_SOUND},
@@ -358,6 +360,8 @@ static bool IsOperand( opcode_t oc )
 		case opcode_t::OP_GLOBAL5:
 		case opcode_t::OP_GLOBAL6:
 		case opcode_t::OP_GLOBAL7:
+		case opcode_t::OP_NAIVE_BLENDING:
+		case opcode_t::OP_LINEAR_BLENDING:
 		case opcode_t::OP_FRAGMENTSHADERS:
 		case opcode_t::OP_FRAMEBUFFEROBJECTS:
 		case opcode_t::OP_SOUND: