[Shader Generator] Remove empty first line

[platform/core/uifw/dali-toolkit.git] / dali-toolkit / shader-generator / shader-generator.cpp

diff --git a/dali-toolkit/shader-generator/shader-generator.cpp b/dali-toolkit/shader-generator/shader-generator.cpp
index d386fb3..16cddcc 100644 (file)
--- a/dali-toolkit/shader-generator/shader-generator.cpp
+++ b/dali-toolkit/shader-generator/shader-generator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2022 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -144,11 +144,24 @@ void GenerateHeaderFile(
             << endl;
     outFile << "const std::string_view " << shaderVariableName << endl;
     outFile << "{" << endl;
+
+    // Using Raw String Literal to generate shader files as this will simplify the file layout.
+    // And it will fix some compilation warnings about missing terminating strings.
+    // Note : we should skip empty headline to guarantee that "#version ~~~" as top of shader code.
+    outFile << "R\"(";
     string line;
+    bool   firstLinePrinted = false;
     while(getline(shaderFile, line))
     {
-      outFile << "\"" << line << "\\n\"" << endl;
+      if(!firstLinePrinted && line.find_first_not_of(" \t\r\n") == std::string::npos)
+      {
+        // Empty string occured!
+        continue;
+      }
+      firstLinePrinted = true;
+      outFile << line << endl;
     }
+    outFile << ")\"" << endl;
     outFile << "};" << endl;
     cout << " [OK]" << endl;
   }