implement glsl hack for corner pin

app/node/distort/cornerpin/cornerpindistortnode.cpp

@@ -97,8 +97,18 @@ void CornerPinDistortNode::Value(const NodeValueRow &value, const NodeGlobals &g
 ShaderCode CornerPinDistortNode::GetShaderCode(const QString &shader_id) const
 {
   Q_UNUSED(shader_id)
-  return ShaderCode(FileFunctions::ReadFileAsString(QStringLiteral(":/shaders/cornerpin.frag")),
-                    FileFunctions::ReadFileAsString(QStringLiteral(":/shaders/cornerpin.vert")));
+  QString frag = FileFunctions::ReadFileAsString(QStringLiteral(":/shaders/cornerpin.frag"));
+  QString vert = FileFunctions::ReadFileAsString(QStringLiteral(":/shaders/cornerpin.vert"));
+
+  // HACK: No good, very bad hack
+#ifndef Q_OS_MAC
+  frag.prepend(QStringLiteral("#version 130"));
+  vert.prepend(QStringLiteral("#version 130"));
+#else
+  vert.prepend(QStringLiteral("#extension GL_EXT_gpu_shader4 : require"));
+#endif
+
+  return ShaderCode(frag, vert);
 }
 
 QPointF CornerPinDistortNode::ValueToPixel(int value, const NodeValueRow& row, const QVector2D &resolution) const

app/shaders/cornerpin.frag

@@ -1,5 +1,3 @@
-#version 130
-
 // Input texture
 uniform sampler2D ove_maintex;
 uniform sampler2D tex_in;

app/shaders/cornerpin.vert

@@ -1,5 +1,3 @@
-#version 130
-
 uniform bool perspective_in;
 uniform vec2 top_left_in;
 uniform vec2 top_right_in;