Fix empty line handling in line directive callback.

Test/baseResults/preprocessor.line.frag.out

 #version 310 es
-
 #line 1 2
 #pragma something
 void main(){ }

Test/baseResults/preprocessor.line.vert.out

@@ -2,20 +2,36 @@
 
 #line 2
 
+
+
+
+
 #line 10
 
+
 #line 2
 
 #line 0
+
+
+
 #line 4
 
+
+
+
+
 #line 8
 
 void main(){
   gl_Position = vec4(10);
 }
+
 #line 8 4
 
+
+
+
 #line 12 3
 
 #line 1

glslang/MachineIndependent/ParseHelper.cpp

@@ -5254,10 +5254,10 @@ void TParseContext::notifyErrorDirective(int line, const char* error_message)
     }
 }
 
-void TParseContext::notifyLineDirective(int line, bool has_source, int source)
+void TParseContext::notifyLineDirective(int curLineNo, int newLineNo, bool hasSource, int sourceNum)
 {
     if (lineCallback) {
-        lineCallback(line, has_source, source);
+        lineCallback(curLineNo, newLineNo, hasSource, sourceNum);
     }
 }
 

glslang/MachineIndependent/ParseHelper.h

@@ -216,7 +216,7 @@ public:
 
     void notifyVersion(int line, int version, const char* type_string);
     void notifyErrorDirective(int line, const char* error_message);
-    void notifyLineDirective(int line, bool has_source, int source);
+    void notifyLineDirective(int curLineNo, int newLineNo, bool hasSource, int sourceNum);
 
     // The following are implemented in Versions.cpp to localize version/profile/stage/extensions control
     void initializeExtensionBehavior();
@@ -236,7 +236,7 @@ public:
 
     void setVersionCallback(const std::function<void(int, int, const char*)>& func) { versionCallback = func; }
     void setPragmaCallback(const std::function<void(int, const TVector<TString>&)>& func) { pragmaCallback = func; }
-    void setLineCallback(const std::function<void(int, bool, int)>& func) { lineCallback = func; }
+    void setLineCallback(const std::function<void(int, int, bool, int)>& func) { lineCallback = func; }
     void setExtensionCallback(const std::function<void(int, const char*, const char*)>& func) { extensionCallback = func; }
     void setErrorCallback(const std::function<void(int, const char*)>& func) { errorCallback = func; }
 
@@ -347,7 +347,7 @@ protected:
 
     // These, if set, will be called when a line, pragma ... is preprocessed.
     // They will be called with any parameters to the original directive.
-    std::function<void(int, bool, int)> lineCallback;
+    std::function<void(int, int, bool, int)> lineCallback;
     std::function<void(int, const TVector<TString>&)> pragmaCallback;
     std::function<void(int, int, const char*)> versionCallback;
     std::function<void(int, const char*, const char*)> extensionCallback;

glslang/MachineIndependent/ShaderLang.cpp

@@ -639,12 +639,10 @@ struct DoPreprocessing {
                 adjustLine(line);
                 outputStream << "#extension " << extension << " : " << behavior;
         });
-        parseContext.setLineCallback([&lastLine, &outputStream, &parseContext](
-            int newLineNo, bool hasSource, int sourceNum) {
+        parseContext.setLineCallback([&adjustLine, &lastLine, &outputStream, &parseContext](
+            int curLineNo, int newLineNo, bool hasSource, int sourceNum) {
             // SourceNum is the number of the source-string that is being parsed.
-            if (lastLine != -1) {
-                outputStream << std::endl;
-            }
+            adjustLine(curLineNo);
             outputStream << "#line " << newLineNo;
             if (hasSource) {
                 outputStream << " " << sourceNum;

glslang/MachineIndependent/preprocessor/Pp.cpp

@@ -624,6 +624,7 @@ int TPpContext::CPPline(TPpToken* ppToken)
     // "#line line source-string-number"
 
     int token = scanToken(ppToken);
+    const int directiveLoc = ppToken->loc.line;
     if (token == '\n') {
         parseContext.error(ppToken->loc, "must by followed by an integral literal", "#line", "");
         return token;
@@ -653,7 +654,7 @@ int TPpContext::CPPline(TPpToken* ppToken)
         }
     }
     if (!fileErr && !lineErr) {
-      parseContext.notifyLineDirective(lineToken, hasFile, fileRes);
+        parseContext.notifyLineDirective(directiveLoc, lineToken, hasFile, fileRes);
     }
     token = extraTokenCheck(lineAtom, ppToken, token);