Make LibOVR support optional at compile-time

[libs/vr.git] / source / ovr / oculusriftdevice.cpp

diff --git a/source/ovr/oculusriftdevice.cpp b/source/ovr/oculusriftdevice.cpp
new file mode 100644 (file)
index 0000000..32558e0
--- /dev/null
+++ b/source/ovr/oculusriftdevice.cpp
@@ -0,0 +1,88 @@
+#include <msp/vr/stereoview.h>
+#include "oculusriftdevice.h"
+#include "oculusriftdevice_private.h"
+
+using namespace std;
+
+namespace Msp {
+namespace VR {
+
+unsigned OculusRiftDevice::n_instances = 0;
+
+OculusRiftDevice::OculusRiftDevice():
+       priv(new Private),
+       frame_index(0)
+{
+       if(!n_instances)
+               ovr_Initialize();
+       ++n_instances;
+
+       priv->ovr_hmd = ovrHmd_Create(0);
+       if(!priv->ovr_hmd)
+       {
+               delete priv;
+               throw runtime_error("rift hmd not found");
+       }
+}
+
+OculusRiftDevice::~OculusRiftDevice()
+{
+       ovrHmd_Destroy(priv->ovr_hmd);
+       delete priv;
+
+       --n_instances;
+       if(!n_instances)
+               ovr_Shutdown();
+}
+
+void OculusRiftDevice::configure_view(StereoView &view) const
+{
+       ovrEyeRenderDesc left_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Left, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
+       ovrEyeRenderDesc right_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Right, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
+       view.set_eye_spacing(left_desc.HmdToEyeViewOffset.x-right_desc.HmdToEyeViewOffset.x);
+}
+
+OculusRiftCamera *OculusRiftDevice::create_camera(const GL::Camera &bc) const
+{
+       return new OculusRiftCamera(*this, bc);
+}
+
+OculusRiftCombiner *OculusRiftDevice::create_combiner() const
+{
+       return new OculusRiftCombiner(*this);
+}
+
+void OculusRiftDevice::begin_frame()
+{
+       priv->frame_timing = ovrHmd_BeginFrameTiming(priv->ovr_hmd, ++frame_index);
+       timing_active = true;
+}
+
+void OculusRiftDevice::end_frame()
+{
+       glFinish();
+       ovrHmd_EndFrameTiming(priv->ovr_hmd);
+       timing_active = false;
+}
+
+double OculusRiftDevice::get_tracking_time() const
+{
+       if(!timing_active)
+               throw logic_error("timing not active");
+       return priv->frame_timing.ScanoutMidpointSeconds;
+}
+
+double OculusRiftDevice::get_timewarp_time() const
+{
+       if(!timing_active)
+               throw logic_error("timing not active");
+       return priv->frame_timing.TimewarpPointSeconds;
+}
+
+double OculusRiftDevice::get_current_time() const
+{
+       return ovr_GetTimeInSeconds();
+}
+
+} // namespace VR
+} // namespace Msp