From 7b9ad022a904110eb15260b2cbf56e6f6b8a03cf Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Thu, 4 Sep 2014 18:12:40 -0700
Subject: [PATCH] Implement text-rotation-alignment

---
 src/renderer/painter_symbol.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/renderer/painter_symbol.cpp b/src/renderer/painter_symbol.cpp
index 4748a75b0..7ab8edfb4 100644
--- a/src/renderer/painter_symbol.cpp
+++ b/src/renderer/painter_symbol.cpp
@@ -24,6 +24,16 @@ void Painter::renderSymbol(SymbolBucket &bucket, std::shared_ptr<StyleLayer> lay
 
         mat4 exMatrix;
         matrix::copy(exMatrix, projMatrix);
+
+        const float angleOffset =
+            bucket.properties.text.rotation_alignment == RotationAlignmentType::Map
+                ? map.getState().getAngle()
+                : 0;
+
+        if (angleOffset) {
+            matrix::rotate_z(exMatrix, exMatrix, angleOffset);
+        }
+
         if (bucket.properties.placement == PlacementType::Line) {
             matrix::rotate_z(exMatrix, exMatrix, map.getState().getAngle());
         }