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/*
* Copyright 2011-2016 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#include "ovr.h"
#if BGFX_CONFIG_USE_OVR
namespace bgfx
{
#if OVR_VERSION <= OVR_VERSION_050
# define OVR_EYE_BUFFER 100
#else
# define OVR_EYE_BUFFER 8
#endif // OVR_VERSION...
OVR::OVR()
: m_hmd(NULL)
, m_isenabled(false)
, m_debug(false)
{
}
OVR::~OVR()
{
BX_CHECK(NULL == m_hmd, "OVR not shutdown properly.");
}
void OVR::init()
{
bool initialized = !!ovr_Initialize();
BX_WARN(initialized, "Unable to create OVR device.");
if (!initialized)
{
return;
}
m_hmd = ovrHmd_Create(0);
if (NULL == m_hmd)
{
m_hmd = ovrHmd_CreateDebug(ovrHmd_DK2);
BX_WARN(NULL != m_hmd, "Unable to create OVR device.");
if (NULL == m_hmd)
{
return;
}
}
BX_TRACE("HMD: %s, %s, firmware: %d.%d"
, m_hmd->ProductName
, m_hmd->Manufacturer
, m_hmd->FirmwareMajor
, m_hmd->FirmwareMinor
);
ovrSizei sizeL = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Left, m_hmd->DefaultEyeFov[0], 1.0f);
ovrSizei sizeR = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Right, m_hmd->DefaultEyeFov[1], 1.0f);
m_rtSize.w = sizeL.w + sizeR.w + OVR_EYE_BUFFER;
m_rtSize.h = bx::uint32_max(sizeL.h, sizeR.h);
m_warning = true;
}
void OVR::shutdown()
{
BX_CHECK(!m_isenabled, "HMD not disabled.");
ovrHmd_Destroy(m_hmd);
m_hmd = NULL;
ovr_Shutdown();
}
void OVR::getViewport(uint8_t _eye, Rect* _viewport)
{
_viewport->m_x = _eye * (m_rtSize.w + OVR_EYE_BUFFER + 1)/2;
_viewport->m_y = 0;
_viewport->m_width = (m_rtSize.w - OVR_EYE_BUFFER)/2;
_viewport->m_height = m_rtSize.h;
}
bool OVR::postReset(void* _nwh, ovrRenderAPIConfig* _config, bool _debug)
{
if (_debug)
{
switch (_config->Header.API)
{
#if BGFX_CONFIG_RENDERER_DIRECT3D11
case ovrRenderAPI_D3D11:
{
ovrD3D11ConfigData* data = (ovrD3D11ConfigData*)_config;
# if OVR_VERSION > OVR_VERSION_043
m_rtSize = data->Header.BackBufferSize;
# else
m_rtSize = data->Header.RTSize;
# endif // OVR_VERSION > OVR_VERSION_043
}
break;
#endif // BGFX_CONFIG_RENDERER_DIRECT3D11
#if BGFX_CONFIG_RENDERER_OPENGL
case ovrRenderAPI_OpenGL:
{
ovrGLConfigData* data = (ovrGLConfigData*)_config;
# if OVR_VERSION > OVR_VERSION_043
m_rtSize = data->Header.BackBufferSize;
# else
m_rtSize = data->Header.RTSize;
# endif // OVR_VERSION > OVR_VERSION_043
}
break;
#endif // BGFX_CONFIG_RENDERER_OPENGL
case ovrRenderAPI_None:
default:
BX_CHECK(false, "You should not be here!");
break;
}
m_debug = true;
return false;
}
if (NULL == m_hmd)
{
return false;
}
m_isenabled = true;
ovrBool result;
result = ovrHmd_AttachToWindow(m_hmd, _nwh, NULL, NULL);
if (!result) { goto ovrError; }
ovrFovPort eyeFov[2] = { m_hmd->DefaultEyeFov[0], m_hmd->DefaultEyeFov[1] };
result = ovrHmd_ConfigureRendering(m_hmd
, _config
, 0
#if OVR_VERSION < OVR_VERSION_050
| ovrDistortionCap_Chromatic // permanently enabled >= v5.0
#endif
| ovrDistortionCap_Vignette
| ovrDistortionCap_TimeWarp
| ovrDistortionCap_Overdrive
| ovrDistortionCap_NoRestore
| ovrDistortionCap_HqDistortion
, eyeFov
, m_erd
);
if (!result) { goto ovrError; }
ovrHmd_SetEnabledCaps(m_hmd
, 0
| ovrHmdCap_LowPersistence
| ovrHmdCap_DynamicPrediction
);
result = ovrHmd_ConfigureTracking(m_hmd
, 0
| ovrTrackingCap_Orientation
| ovrTrackingCap_MagYawCorrection
| ovrTrackingCap_Position
, 0
);
if (!result)
{
ovrError:
BX_TRACE("Failed to initialize OVR.");
m_isenabled = false;
return false;
}
m_warning = true;
return true;
}
void OVR::postReset(const ovrTexture& _texture)
{
if (NULL != m_hmd)
{
m_texture[0] = _texture;
m_texture[1] = _texture;
ovrRecti rect;
rect.Pos.x = 0;
rect.Pos.y = 0;
rect.Size.w = (m_rtSize.w - OVR_EYE_BUFFER)/2;
rect.Size.h = m_rtSize.h;
m_texture[0].Header.RenderViewport = rect;
rect.Pos.x += rect.Size.w + OVR_EYE_BUFFER;
m_texture[1].Header.RenderViewport = rect;
m_timing = ovrHmd_BeginFrame(m_hmd, 0);
#if OVR_VERSION > OVR_VERSION_042
m_pose[0] = ovrHmd_GetHmdPosePerEye(m_hmd, ovrEye_Left);
m_pose[1] = ovrHmd_GetHmdPosePerEye(m_hmd, ovrEye_Right);
#else
m_pose[0] = ovrHmd_GetEyePose(m_hmd, ovrEye_Left);
m_pose[1] = ovrHmd_GetEyePose(m_hmd, ovrEye_Right);
#endif // OVR_VERSION > OVR_VERSION_042
}
}
void OVR::preReset()
{
if (m_isenabled)
{
ovrHmd_EndFrame(m_hmd, m_pose, m_texture);
ovrHmd_AttachToWindow(m_hmd, NULL, NULL, NULL);
ovrHmd_ConfigureRendering(m_hmd, NULL, 0, NULL, NULL);
m_isenabled = false;
}
m_debug = false;
}
bool OVR::swap(HMD& _hmd)
{
_hmd.flags = BGFX_HMD_NONE;
if (NULL != m_hmd)
{
_hmd.flags |= BGFX_HMD_DEVICE_RESOLUTION;
_hmd.deviceWidth = m_hmd->Resolution.w;
_hmd.deviceHeight = m_hmd->Resolution.h;
}
if (!m_isenabled)
{
return false;
}
_hmd.flags |= BGFX_HMD_RENDERING;
ovrHmd_EndFrame(m_hmd, m_pose, m_texture);
if (m_warning)
{
m_warning = !ovrHmd_DismissHSWDisplay(m_hmd);
}
m_timing = ovrHmd_BeginFrame(m_hmd, 0);
#if OVR_VERSION > OVR_VERSION_042
m_pose[0] = ovrHmd_GetHmdPosePerEye(m_hmd, ovrEye_Left);
m_pose[1] = ovrHmd_GetHmdPosePerEye(m_hmd, ovrEye_Right);
#else
m_pose[0] = ovrHmd_GetEyePose(m_hmd, ovrEye_Left);
m_pose[1] = ovrHmd_GetEyePose(m_hmd, ovrEye_Right);
#endif // OVR_VERSION > OVR_VERSION_042
getEyePose(_hmd);
return true;
}
void OVR::recenter()
{
if (NULL != m_hmd)
{
ovrHmd_RecenterPose(m_hmd);
}
}
void OVR::getEyePose(HMD& _hmd)
{
if (NULL != m_hmd)
{
for (int ii = 0; ii < 2; ++ii)
{
const ovrPosef& pose = m_pose[ii];
HMD::Eye& eye = _hmd.eye[ii];
eye.rotation[0] = pose.Orientation.x;
eye.rotation[1] = pose.Orientation.y;
eye.rotation[2] = pose.Orientation.z;
eye.rotation[3] = pose.Orientation.w;
eye.translation[0] = pose.Position.x;
eye.translation[1] = pose.Position.y;
eye.translation[2] = pose.Position.z;
const ovrEyeRenderDesc& erd = m_erd[ii];
eye.fov[0] = erd.Fov.UpTan;
eye.fov[1] = erd.Fov.DownTan;
eye.fov[2] = erd.Fov.LeftTan;
eye.fov[3] = erd.Fov.RightTan;
#if OVR_VERSION > OVR_VERSION_042
eye.viewOffset[0] = erd.HmdToEyeViewOffset.x;
eye.viewOffset[1] = erd.HmdToEyeViewOffset.y;
eye.viewOffset[2] = erd.HmdToEyeViewOffset.z;
#else
eye.viewOffset[0] = erd.ViewAdjust.x;
eye.viewOffset[1] = erd.ViewAdjust.y;
eye.viewOffset[2] = erd.ViewAdjust.z;
#endif // OVR_VERSION > OVR_VERSION_042
eye.pixelsPerTanAngle[0] = erd.PixelsPerTanAngleAtCenter.x;
eye.pixelsPerTanAngle[1] = erd.PixelsPerTanAngleAtCenter.y;
}
}
else
{
for (int ii = 0; ii < 2; ++ii)
{
_hmd.eye[ii].rotation[0] = 0.0f;
_hmd.eye[ii].rotation[1] = 0.0f;
_hmd.eye[ii].rotation[2] = 0.0f;
_hmd.eye[ii].rotation[3] = 1.0f;
_hmd.eye[ii].translation[0] = 0.0f;
_hmd.eye[ii].translation[1] = 0.0f;
_hmd.eye[ii].translation[2] = 0.0f;
_hmd.eye[ii].fov[0] = 1.32928634f;
_hmd.eye[ii].fov[1] = 1.32928634f;
_hmd.eye[ii].fov[2] = 0 == ii ? 1.05865765f : 1.09236801f;
_hmd.eye[ii].fov[3] = 0 == ii ? 1.09236801f : 1.05865765f;
_hmd.eye[ii].viewOffset[0] = 0 == ii ? 0.0355070010f : -0.0375000015f;
_hmd.eye[ii].viewOffset[1] = 0.0f;
_hmd.eye[ii].viewOffset[2] = 0 == ii ? 0.00150949787f : -0.00150949787f;
_hmd.eye[ii].pixelsPerTanAngle[0] = 1;
_hmd.eye[ii].pixelsPerTanAngle[1] = 1;
}
}
_hmd.width = uint16_t(m_rtSize.w);
_hmd.height = uint16_t(m_rtSize.h);
}
} // namespace bgfx
#endif // BGFX_CONFIG_USE_OVR
|