source/openvr/openvrcombiner.cpp

   1 #include <openvr.h>
   2 #include "openvrcombiner.h"
   3 #include "openvrsystem.h"
   4
   5 namespace Msp {
   6 namespace VR {
   7
   8 struct OpenVRCombiner::Private
   9 {
  10         static Frustum get_projection(vr::EVREye);
  11 };
  12
  13
  14 OpenVRCombiner::OpenVRCombiner(OpenVRSystem &d, GL::View &v):
  15         device(d),
  16         view(v)
  17 {
  18         vr::IVRSystem *vr_sys = vr::VRSystem();
  19         uint32_t w, h;
  20         vr_sys->GetRecommendedRenderTargetSize(&w, &h);
  21         target_width = w;
  22         target_height = h;
  23
  24         Frustum left_frustum = Private::get_projection(vr::Eye_Left);
  25         Frustum right_frustum = Private::get_projection(vr::Eye_Right);
  26         configure_eye_frustums(left_frustum, right_frustum);
  27
  28         view.get_context().set_swap_interval(0);
  29         set_mirroring(true);
  30 }
  31
  32 void OpenVRCombiner::prepare() const
  33 {
  34         device.update_pose_matrices();
  35 }
  36
  37 void OpenVRCombiner::render(const GL::Texture2D &left, const GL::Texture2D &right) const
  38 {
  39         vr::Texture_t tex;
  40         tex.eType = vr::API_OpenGL;
  41         tex.eColorSpace = vr::ColorSpace_Gamma;
  42
  43         vr::IVRCompositor *compositor = vr::VRCompositor();
  44         tex.handle = reinterpret_cast<void *>(left.get_id());
  45         compositor->Submit(vr::Eye_Left, &tex);
  46         tex.handle = reinterpret_cast<void *>(right.get_id());
  47         compositor->Submit(vr::Eye_Right, &tex);
  48
  49         if(mirror)
  50         {
  51                 mirror->shdata.uniform("scale", view.get_aspect()/render_aspect/2, 0.5f);
  52                 render_mirror(left);
  53                 view.get_context().swap_buffers();
  54         }
  55 }
  56
  57
  58 StereoCombiner::Frustum OpenVRCombiner::Private::get_projection(vr::EVREye eye)
  59 {
  60         Frustum frustum;
  61         /* The parameter order is documented as left, right, top, bottom; however
  62         the third parameter is actually negative and fourth one positive. */
  63         vr::VRSystem()->GetProjectionRaw(eye, &frustum.left, &frustum.right, &frustum.bottom, &frustum.top);
  64         return frustum;
  65 }
  66
  67 } // namespace VR
  68 } // namespace Msp