libappfw|VRConfig: Determining if VR mode displaces content on screen

skyjake · Aug 14, 2014 · 85ab399 · 85ab399
1 parent f6e01a7
commit 85ab399
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diff --git a/doomsday/libappfw/include/de/vr/vrconfig.h b/doomsday/libappfw/include/de/vr/vrconfig.h
@@ -206,6 +206,16 @@ class LIBAPPFW_PUBLIC VRConfig
     de::OculusRift const &oculusRift() const;
 
 public:
+    /**
+     * Determines if the VR mode will be applying a transformation to window contents
+     * that displaces the content from its "actual" location.
+     *
+     * @param mode  Mode.
+     *
+     * @return @c true, if contents will change position on screen.
+     */
+    static bool modeAppliesDisplacement(StereoMode mode);
+
     static bool modeNeedsStereoGLFormat(StereoMode mode);
 
 private:

diff --git a/doomsday/libappfw/src/vr/vrconfig.cpp b/doomsday/libappfw/src/vr/vrconfig.cpp
@@ -246,4 +246,22 @@ OculusRift const &VRConfig::oculusRift() const
     return d->ovr;
 }
 
+bool VRConfig::modeAppliesDisplacement(StereoMode mode)
+{
+    switch(mode)
+    {
+    case Mono:
+    case GreenMagenta:
+    case RedCyan:
+    case LeftOnly:
+    case RightOnly:
+    case QuadBuffered:
+        return false;
+
+    default:
+        break;
+    }
+    return true;
+}
+
 } // namespace de