Add special blend mode for Conker BFD dynamic shadows

GLSLCombiner.cpp

@@ -801,6 +801,14 @@ void ShaderCombiner::updateColors(bool _bForce)
 			_setV4Uniform(m_uniforms.uBlendColor, &gDP.blendColor.r, _bForce);
 		}
 		break;
+	case 0x07C2:
+		// Conker BFD shadow
+		// CLR_IN * A_FOG + CLR_FOG * 1MA
+		if (gDP.otherMode.cycleType == G_CYC_2CYCLE) {
+			nSpecialBlendMode = 3;
+			nFogUsage = 5;
+		}
+		break;
 	/* Brings troubles with Roadsters sky
 	case 0xc702:
 		// Donald Duck

OpenGL.cpp

@@ -497,6 +497,10 @@ void OGLRender::_setBlendMode() const
 			// Battlezone
 			// clr_in * a + clr_in * (1-a)
 			case 0xC800:
+			// Conker BFD
+			// clr_in * a_fog + clr_fog * (1-a)
+			// clr_in * 0 + clr_in * 1
+			case 0x07C2:
 			case 0x00C0:
 			//ISS64
 			case 0xC302:

Shaders.h

@@ -357,6 +357,10 @@ static const char* fragment_shader_blender =
 // Bomberman2
 "		color1 = uBlendColor.rgb * uFogColor.a + color1 * (1.0 - uFogColor.a); \n"
 "    break;						\n"
+"    case 3:					\n"
+// Conker BFD
+"		color1 = color1 * uFogColor.a + uFogColor.rgb * (1.0 - uFogColor.a); \n"
+"    break;						\n"
 "  }							\n"
 ;
 #endif