Added gl_FragDepth

src/OpenGL/compiler/BaseTypes.h

@@ -370,6 +370,7 @@ enum TQualifier : unsigned char
     // built-ins written by fragment shader
     EvqFragColor,
     EvqFragData,
+    EvqFragDepth,
 
     // GLSL ES 3.0 vertex output and fragment input
     EvqSmooth,        // Incomplete qualifier, smooth is the default
@@ -441,6 +442,7 @@ inline const char *getQualifierString(TQualifier qualifier)
     case EvqFrontFacing:    return "FrontFacing";    break;
     case EvqFragColor:      return "FragColor";      break;
     case EvqFragData:       return "FragData";       break;
+    case EvqFragDepth:      return "FragDepth";      break;
     case EvqSmooth:         return "Smooth";         break;
     case EvqFlat:           return "Flat";           break;
     case EvqCentroidOut:    return "CentroidOut";    break;

src/OpenGL/compiler/Initialize.cpp

@@ -447,6 +447,7 @@ void IdentifyBuiltIns(GLenum shaderType,
         symbolTable.insert(COMMON_BUILTINS, *new TVariable(NewPoolTString("gl_PointCoord"), TType(EbtFloat, EbpMedium, EvqPointCoord,  2)));
         symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("gl_FragColor"), TType(EbtFloat, EbpMedium, EvqFragColor,   4)));
         symbolTable.insert(ESSL1_BUILTINS, *new TVariable(NewPoolTString("gl_FragData[gl_MaxDrawBuffers]"), TType(EbtFloat, EbpMedium, EvqFragData,    4)));
+        symbolTable.insert(ESSL3_BUILTINS, *new TVariable(NewPoolTString("gl_FragDepth"), TType(EbtFloat, EbpHigh, EvqFragDepth, 1)));
         break;
     case GL_VERTEX_SHADER:
         symbolTable.insert(COMMON_BUILTINS, *new TVariable(NewPoolTString("gl_Position"), TType(EbtFloat, EbpHigh, EvqPosition,    4)));

src/OpenGL/compiler/OutputASM.cpp

@@ -2055,6 +2055,7 @@ namespace glsl
 		case EvqPointCoord:          return sw::Shader::PARAMETER_INPUT;
 		case EvqFragColor:           return sw::Shader::PARAMETER_COLOROUT;
 		case EvqFragData:            return sw::Shader::PARAMETER_COLOROUT;
+		case EvqFragDepth:           return sw::Shader::PARAMETER_DEPTHOUT;
 		default: UNREACHABLE(qualifier);
 		}
 
@@ -2101,6 +2102,7 @@ namespace glsl
 		case EvqPointCoord:          return varyingRegister(operand);
 		case EvqFragColor:           return 0;
 		case EvqFragData:            return 0;
+		case EvqFragDepth:           return 0;
 		default: UNREACHABLE(operand->getQualifier());
 		}