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Adding support for eye per frame mode and offscreen render scaling

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This commit is contained in:
Bradley Austin Davis 2015-03-31 18:24:58 -07:00
parent a7eebfd002
commit eb816f7f6a
2 changed files with 39 additions and 20 deletions
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51
interface/src/devices/OculusManager.cpp
View file

@ -96,6 +96,12 @@ glm::quat OculusManager::_calibrationOrientation;
quint64 OculusManager::_calibrationStartTime;
int OculusManager::_calibrationMessage = NULL;
glm::vec3 OculusManager::_eyePositions[ovrEye_Count];
// TODO expose this as a developer toggle
bool OculusManager::_eyePerFrameMode = false;
ovrEyeType OculusManager::_lastEyeRendered = ovrEye_Count;
ovrSizei OculusManager::_recommendedTexSize = { 0, 0 };
float OculusManager::_offscreenRenderScale = 1.0;
void OculusManager::initSdk() {
ovr_Initialize();
@ -148,20 +154,16 @@ void OculusManager::connect() {
assert(configResult);
_renderTargetSize = { 0, 0 };
_recommendedTexSize = ovrHmd_GetFovTextureSize(_ovrHmd, ovrEye_Left, _eyeFov[ovrEye_Left], 1.0f);
_renderTargetSize = { _recommendedTexSize.w * 2, _recommendedTexSize.h };
for_each_eye([&](ovrEyeType eye) {
//Get texture size
ovrSizei recommendedTexSize = ovrHmd_GetFovTextureSize(_ovrHmd, eye, _eyeFov[eye], 1.0f);
_eyeTextures[eye].Header.API = ovrRenderAPI_OpenGL;
_eyeTextures[eye].Header.RenderViewport.Pos = { _renderTargetSize.w, 0 };
_eyeTextures[eye].Header.RenderViewport.Size = recommendedTexSize;
_renderTargetSize.w += recommendedTexSize.w;
_renderTargetSize.h = std::max(recommendedTexSize.h, _renderTargetSize.h);
});
for_each_eye([&](ovrEyeType eye) {
_eyeTextures[eye].Header.TextureSize = _renderTargetSize;
_eyeTextures[eye].Header.RenderViewport.Pos = { 0, 0 };
});
_eyeTextures[ovrEye_Right].Header.RenderViewport.Pos.x = _recommendedTexSize.w;
ovrHmd_SetEnabledCaps(_ovrHmd, ovrHmdCap_LowPersistence);
ovrHmd_ConfigureTracking(_ovrHmd, ovrTrackingCap_Orientation | ovrTrackingCap_Position |
@ -362,9 +364,6 @@ void OculusManager::generateDistortionMesh() {
// Allocate and generate distortion mesh vertices
ovrDistortionMesh meshData;
ovrHmd_CreateDistortionMesh(_ovrHmd, _eyeRenderDesc[eyeNum].Eye, _eyeRenderDesc[eyeNum].Fov, _ovrHmd->DistortionCaps, &meshData);
ovrHmd_GetRenderScaleAndOffset(_eyeRenderDesc[eyeNum].Fov, _renderTargetSize, _eyeTextures[eyeNum].Header.RenderViewport,
_UVScaleOffset[eyeNum]);
// Parse the vertex data and create a render ready vertex buffer
DistortionVertex* pVBVerts = new DistortionVertex[meshData.VertexCount];
@ -523,12 +522,20 @@ void OculusManager::display(const glm::quat &bodyOrientation, const glm::vec3 &p
trackerPosition = bodyOrientation * trackerPosition;
static ovrVector3f eyeOffsets[2] = { { 0, 0, 0 }, { 0, 0, 0 } };
ovrPosef eyeRenderPose[ovrEye_Count];
ovrHmd_GetEyePoses(_ovrHmd, _frameIndex, eyeOffsets, eyeRenderPose, nullptr);
ovrPosef eyePoses[ovrEye_Count];
ovrHmd_GetEyePoses(_ovrHmd, _frameIndex, eyeOffsets, eyePoses, nullptr);
ovrHmd_BeginFrame(_ovrHmd, _frameIndex);
static ovrPosef eyeRenderPose[ovrEye_Count];
//Render each eye into an fbo
for_each_eye(_ovrHmd, [&](ovrEyeType eye){
_activeEye = eye;
// If we're in eye-per-frame mode, only render one eye
// per call to display, and allow timewarp to correct for
// the other eye. Poor man's perf improvement
if (_eyePerFrameMode && eye == _lastEyeRendered) {
return;
}
_lastEyeRendered = _activeEye = eye;
eyeRenderPose[eye] = eyePoses[eye];
// Set the camera rotation for this eye
orientation.x = eyeRenderPose[eye].Orientation.x;
orientation.y = eyeRenderPose[eye].Orientation.y;
@ -558,7 +565,10 @@ void OculusManager::display(const glm::quat &bodyOrientation, const glm::vec3 &p
glFrustum(-nearClip * port.LeftTan, nearClip * port.RightTan, -nearClip * port.DownTan,
nearClip * port.UpTan, nearClip, farClip);
const ovrRecti & vp = _eyeTextures[eye].Header.RenderViewport;
ovrRecti & vp = _eyeTextures[eye].Header.RenderViewport;
vp.Size.h = _recommendedTexSize.h * _offscreenRenderScale;
vp.Size.w = _recommendedTexSize.w * _offscreenRenderScale;
glViewport(vp.Pos.x, vp.Pos.y, vp.Size.w, vp.Size.h);
glMatrixMode(GL_MODELVIEW);
@ -602,7 +612,7 @@ void OculusManager::display(const glm::quat &bodyOrientation, const glm::vec3 &p
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, finalFbo->texture());
//Renders the distorted mesh onto the screen
renderDistortionMesh(eyeRenderPose);
@ -612,6 +622,7 @@ void OculusManager::display(const glm::quat &bodyOrientation, const glm::vec3 &p
for_each_eye([&](ovrEyeType eye) {
ovrGLTexture & glEyeTexture = reinterpret_cast<ovrGLTexture&>(_eyeTextures[eye]);
glEyeTexture.OGL.TexId = finalFbo->texture();
});
ovrHmd_EndFrame(_ovrHmd, eyeRenderPose, _eyeTextures);
@ -639,9 +650,13 @@ void OculusManager::renderDistortionMesh(ovrPosef eyeRenderPose[ovrEye_Count]) {
//Render the distortion meshes for each eye
for (int eyeNum = 0; eyeNum < ovrEye_Count; eyeNum++) {
ovrHmd_GetRenderScaleAndOffset(_eyeRenderDesc[eyeNum].Fov, _renderTargetSize, _eyeTextures[eyeNum].Header.RenderViewport,
_UVScaleOffset[eyeNum]);
GLfloat uvScale[2] = { _UVScaleOffset[eyeNum][0].x, _UVScaleOffset[eyeNum][0].y };
_program.setUniformValueArray(_eyeToSourceUVScaleLocation, uvScale, 1, 2);
GLfloat uvOffset[2] = { _UVScaleOffset[eyeNum][1].x, _UVScaleOffset[eyeNum][1].y };
GLfloat uvOffset[2] = { _UVScaleOffset[eyeNum][1].x, 1.0f - _UVScaleOffset[eyeNum][1].y };
_program.setUniformValueArray(_eyeToSourceUVOffsetLocation, uvOffset, 1, 2);
ovrMatrix4f timeWarpMatrices[2];

8
interface/src/devices/OculusManager.h
View file

@ -28,7 +28,7 @@ class Text3DOverlay;
// the Oculus SDK will ideally provide the best practices for distortion in
// in terms of performance and quality, and by using it we will get updated
// best practices for free with new runtime releases.
// #define OVR_CLIENT_DISTORTION 1
#define OVR_CLIENT_DISTORTION 1
// On Win32 platforms, enabling Direct HMD requires that the SDK be
@ -148,7 +148,11 @@ private:
static glm::quat _calibrationOrientation;
static quint64 _calibrationStartTime;
static int _calibrationMessage;
// TODO drop this variable and use the existing 'Developer | Render | Scale Resolution' value
static ovrSizei _recommendedTexSize;
static float _offscreenRenderScale;
static bool _eyePerFrameMode;
static ovrEyeType _lastEyeRendered;
};