127     GrGLSLShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, precision);  in onEmitCode()  local
136     fragBuilder->declAppend(dklmdx);  in onEmitCode()
148             fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());  in onEmitCode()
152                                      v.fsIn(), dklmdx.c_str(),  in onEmitCode()
153                                      v.fsIn(), dklmdx.c_str(),  in onEmitCode()
154                                      v.fsIn(), dklmdx.c_str());  in onEmitCode()
177             fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());  in onEmitCode()
182                                      v.fsIn(), dklmdx.c_str(),  in onEmitCode()
183                                      v.fsIn(), dklmdx.c_str(),  in onEmitCode()
184                                      v.fsIn(), dklmdx.c_str());  in onEmitCode()
592     GrGLSLShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, kHigh_GrSLPrecision);  in onEmitCode()  local
601     fragBuilder->declAppend(dklmdx);  in onEmitCode()
613             fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());  in onEmitCode()
616                                      dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(),  in onEmitCode()
617                                      dklmdx.c_str(), v.fsIn(), dklmdx.c_str());  in onEmitCode()
641             fragBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn());  in onEmitCode()
645                                      dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(),  in onEmitCode()
646                                      dklmdx.c_str(), v.fsIn(), dklmdx.c_str());  in onEmitCode()