OVR_PUBLIC_FUNCTION(ovrResult) ovr_SubmitFrame(ovrSession session, long long frameIndex, const ovrViewScaleDesc* viewScaleDesc,
ovrLayerHeader const * const * layerPtrList, unsigned int layerCount)
{
// TODO: Implement scaling through ApplyTransform().
// Call WaitGetPoses() to do some cleanup from the previous frame.
session->compositor->WaitGetPoses(session->poses, vr::k_unMaxTrackedDeviceCount, session->gamePoses, vr::k_unMaxTrackedDeviceCount);
if (layerCount == 0)
return ovrError_InvalidParameter;
// The first layer is assumed to be the application scene.
if (layerPtrList[0]->Type != ovrLayerType_EyeFov)
return ovrSuccess_NotVisible;
ovrLayerEyeFov* sceneLayer = (ovrLayerEyeFov*)layerPtrList[0];
// Other layers are interpreted as overlays.
for (size_t i = 1; i < vr::k_unMaxOverlayCount + 1; i++)
{
char keyName[vr::k_unVROverlayMaxKeyLength];
snprintf(keyName, vr::k_unVROverlayMaxKeyLength, "Revive_%d", i);
// Look if the overlay already exists.
vr::VROverlayHandle_t overlay;
vr::EVROverlayError err = session->overlay->FindOverlay(keyName, &overlay);
// If this layer is defined in the list, show it. If not, hide the layer if it exists.
if (i < layerCount)
{
// Create a new overlay if it doesn't exist.
if (err == vr::VROverlayError_UnknownOverlay)
{
char title[vr::k_unVROverlayMaxNameLength];
snprintf(title, vr::k_unVROverlayMaxNameLength, "Revive Layer %d", i);
session->overlay->CreateOverlay(keyName, title, &overlay);
}
// A layer was added, but not defined, hide it.
if (layerPtrList[i] == nullptr)
{
session->overlay->HideOverlay(overlay);
continue;
}
// Overlays are assumed to be monoscopic quads.
_ASSERT(layerPtrList[i]->Type == ovrLayerType_Quad);
ovrLayerQuad* layer = (ovrLayerQuad*)layerPtrList[i];
// Set the high quality overlay.
if (layer->Header.Flags & ovrLayerFlag_HighQuality)
session->overlay->SetHighQualityOverlay(overlay);
// Transform the overlay.
vr::HmdMatrix34_t transform = REV_OvrPoseToHmdMatrix(layer->QuadPoseCenter);
session->overlay->SetOverlayWidthInMeters(overlay, layer->QuadSize.x);
if (layer->Header.Flags & ovrLayerFlag_HeadLocked)
session->overlay->SetOverlayTransformTrackedDeviceRelative(overlay, vr::k_unTrackedDeviceIndex_Hmd, &transform);
else
session->overlay->SetOverlayTransformAbsolute(overlay, session->compositor->GetTrackingSpace(), &transform);
// Set the texture and show the overlay.
ovrTextureSwapChain chain = layer->ColorTexture;
vr::VRTextureBounds_t bounds = REV_ViewportToTextureBounds(layer->Viewport, layer->ColorTexture, layer->Header.Flags);
session->overlay->SetOverlayTextureBounds(overlay, &bounds);
session->overlay->SetOverlayTexture(overlay, &chain->current);
// TODO: Handle overlay errors.
session->overlay->ShowOverlay(overlay);
}
else
{
if (err == vr::VROverlayError_UnknownOverlay)
break;
// Hide all overlays no longer visible.
session->overlay->HideOverlay(overlay);
}
}
// Submit the scene layer.
for (int i = 0; i < ovrEye_Count; i++)
{
ovrTextureSwapChain chain = sceneLayer->ColorTexture[i];
session->ColorTexture[i] = chain;
vr::VRTextureBounds_t bounds = REV_ViewportToTextureBounds(sceneLayer->Viewport[i], sceneLayer->ColorTexture[i], sceneLayer->Header.Flags);
vr::EVRCompositorError err = session->compositor->Submit((vr::EVREye)i, &chain->current, &bounds);
if (err != vr::VRCompositorError_None)
return REV_CompositorErrorToOvrError(err);
}
return ovrSuccess;
}
OVR_PUBLIC_FUNCTION(ovrResult) ovr_SubmitFrame(ovrSession session, long long frameIndex, const ovrViewScaleDesc* viewScaleDesc,
ovrLayerHeader const * const * layerPtrList, unsigned int layerCount)
{
// TODO: Implement scaling through ApplyTransform().
if (!session)
return ovrError_InvalidSession;
if (layerCount == 0 || !layerPtrList)
return ovrError_InvalidParameter;
// Other layers are interpreted as overlays.
for (size_t i = 0; i < ovrMaxLayerCount; i++)
{
// If this layer is defined in the list, show it. If not, hide the layer if it exists.
if (i < layerCount)
{
// Create a new overlay if it doesn't exist.
if (session->overlays[i] == vr::k_ulOverlayHandleInvalid)
{
char keyName[vr::k_unVROverlayMaxKeyLength];
snprintf(keyName, vr::k_unVROverlayMaxKeyLength, "revive.runtime.layer%d", i);
char title[vr::k_unVROverlayMaxNameLength];
snprintf(title, vr::k_unVROverlayMaxNameLength, "Revive Layer %d", i);
session->overlay->CreateOverlay(keyName, title, &session->overlays[i]);
}
// A layer was added, but not defined, hide it.
if (layerPtrList[i] == nullptr)
{
session->overlay->HideOverlay(session->overlays[i]);
continue;
}
// Overlays are assumed to be monoscopic quads.
if (layerPtrList[i]->Type != ovrLayerType_Quad)
continue;
ovrLayerQuad* layer = (ovrLayerQuad*)layerPtrList[i];
// Set the high quality overlay.
// FIXME: Why are High quality overlays headlocked in OpenVR?
//if (layer->Header.Flags & ovrLayerFlag_HighQuality)
// session->overlay->SetHighQualityOverlay(overlay);
// Transform the overlay.
vr::HmdMatrix34_t transform = REV_OvrPoseToHmdMatrix(layer->QuadPoseCenter);
session->overlay->SetOverlayWidthInMeters(session->overlays[i], layer->QuadSize.x);
if (layer->Header.Flags & ovrLayerFlag_HeadLocked)
session->overlay->SetOverlayTransformTrackedDeviceRelative(session->overlays[i], vr::k_unTrackedDeviceIndex_Hmd, &transform);
else
session->overlay->SetOverlayTransformAbsolute(session->overlays[i], session->compositor->GetTrackingSpace(), &transform);
// Set the texture and show the overlay.
ovrTextureSwapChain chain = layer->ColorTexture;
vr::VRTextureBounds_t bounds = REV_ViewportToTextureBounds(layer->Viewport, layer->ColorTexture, layer->Header.Flags);
session->overlay->SetOverlayTextureBounds(session->overlays[i], &bounds);
session->overlay->SetOverlayTexture(session->overlays[i], &chain->current);
// TODO: Handle overlay errors.
session->overlay->ShowOverlay(session->overlays[i]);
}
else
{
if (session->overlays[i] != vr::k_ulOverlayHandleInvalid)
{
// Destory all overlays no longer listed.
session->overlay->DestroyOverlay(session->overlays[i]);
session->overlays[i] = vr::k_ulOverlayHandleInvalid;
}
}
}
// The first layer is assumed to be the application scene.
vr::EVRCompositorError err = vr::VRCompositorError_None;
if (layerPtrList[0]->Type == ovrLayerType_EyeFov)
{
ovrLayerEyeFov* sceneLayer = (ovrLayerEyeFov*)layerPtrList[0];
// Submit the scene layer.
for (int i = 0; i < ovrEye_Count; i++)
{
ovrTextureSwapChain chain = sceneLayer->ColorTexture[i];
vr::VRTextureBounds_t bounds = REV_ViewportToTextureBounds(sceneLayer->Viewport[i], sceneLayer->ColorTexture[i], sceneLayer->Header.Flags);
float left, right, top, bottom;
g_VRSystem->GetProjectionRaw((vr::EVREye)i, &left, &right, &top, &bottom);
// Shrink the bounds to account for the overlapping fov
ovrFovPort fov = sceneLayer->Fov[i];
float uMin = 0.5f + 0.5f * left / fov.LeftTan;
float uMax = 0.5f + 0.5f * right / fov.RightTan;
float vMin = 0.5f - 0.5f * bottom / fov.UpTan;
float vMax = 0.5f - 0.5f * top / fov.DownTan;
// Combine the fov bounds with the viewport bounds
bounds.uMin += uMin * bounds.uMax;
bounds.uMax *= uMax;
bounds.vMin += vMin * bounds.vMax;
bounds.vMax *= vMax;
if (chain->texture[i].eType == vr::API_OpenGL)
{
bounds.vMin = 1.0f - bounds.vMin;
bounds.vMax = 1.0f - bounds.vMax;
}
err = session->compositor->Submit((vr::EVREye)i, &chain->current, &bounds);
if (err != vr::VRCompositorError_None)
break;
}
}
// The first layer is assumed to be the application scene.
if (layerPtrList[0]->Type == ovrLayerType_EyeMatrix)
{
ovrLayerEyeMatrix* sceneLayer = (ovrLayerEyeMatrix*)layerPtrList[0];
// Submit the scene layer.
for (int i = 0; i < ovrEye_Count; i++)
{
ovrTextureSwapChain chain = sceneLayer->ColorTexture[i];
vr::VRTextureBounds_t bounds = REV_ViewportToTextureBounds(sceneLayer->Viewport[i], sceneLayer->ColorTexture[i], sceneLayer->Header.Flags);
float left, right, top, bottom;
g_VRSystem->GetProjectionRaw((vr::EVREye)i, &left, &right, &top, &bottom);
// Shrink the bounds to account for the overlapping fov
ovrVector2f fov = { .5f / sceneLayer->Matrix[i].M[0][0], .5f / sceneLayer->Matrix[i].M[1][1] };
float uMin = 0.5f + 0.5f * left / fov.x;
float uMax = 0.5f + 0.5f * right / fov.x;
float vMin = 0.5f - 0.5f * bottom / fov.y;
float vMax = 0.5f - 0.5f * top / fov.y;
// Combine the fov bounds with the viewport bounds
bounds.uMin += uMin * bounds.uMax;
bounds.uMax *= uMax;
bounds.vMin += vMin * bounds.vMax;
bounds.vMax *= vMax;
if (chain->texture[i].eType == vr::API_OpenGL)
{
bounds.vMin = 1.0f - bounds.vMin;
bounds.vMax = 1.0f - bounds.vMax;
}
err = session->compositor->Submit((vr::EVREye)i, &chain->current, &bounds);
if (err != vr::VRCompositorError_None)
break;
}
}
// Call WaitGetPoses() to do some cleanup from the previous frame.
session->compositor->WaitGetPoses(session->poses, vr::k_unMaxTrackedDeviceCount, session->gamePoses, vr::k_unMaxTrackedDeviceCount);
g_FrameIndex = frameIndex;
return REV_CompositorErrorToOvrError(err);
}