diff options
Diffstat (limited to 'LibOVR/Src/CAPI/D3D9/CAPI_D3D9_DistortionRenderer.cpp')
| -rw-r--r-- | LibOVR/Src/CAPI/D3D9/CAPI_D3D9_DistortionRenderer.cpp | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/LibOVR/Src/CAPI/D3D9/CAPI_D3D9_DistortionRenderer.cpp b/LibOVR/Src/CAPI/D3D9/CAPI_D3D9_DistortionRenderer.cpp new file mode 100644 index 0000000..2625d9f --- /dev/null +++ b/LibOVR/Src/CAPI/D3D9/CAPI_D3D9_DistortionRenderer.cpp @@ -0,0 +1,379 @@ +/************************************************************************************ + +Filename : CAPI_D3D1X_DistortionRenderer.cpp +Content : Experimental distortion renderer +Created : March 7th, 2014 +Authors : Tom Heath + +Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved. + +Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); +you may not use the Oculus VR Rift SDK except in compliance with the License, +which is provided at the time of installation or download, or which +otherwise accompanies this software in either electronic or hard copy form. + +You may obtain a copy of the License at + +http://www.oculusvr.com/licenses/LICENSE-3.2 + +Unless required by applicable law or agreed to in writing, the Oculus VR SDK +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +************************************************************************************/ + +#include "CAPI_D3D9_DistortionRenderer.h" +#define OVR_D3D_VERSION 9 +#include "../../OVR_CAPI_D3D.h" + +namespace OVR { namespace CAPI { namespace D3D9 { + + +///QUESTION : Why not just a normal constructor? +CAPI::DistortionRenderer* DistortionRenderer::Create(ovrHmd hmd, + FrameTimeManager& timeManager, + const HMDRenderState& renderState) +{ + return new DistortionRenderer(hmd, timeManager, renderState); +} + +DistortionRenderer::DistortionRenderer(ovrHmd hmd, FrameTimeManager& timeManager, + const HMDRenderState& renderState) + : CAPI::DistortionRenderer(ovrRenderAPI_D3D9, hmd, timeManager, renderState), + Device(NULL), + SwapChain(NULL), + VertexDecl(NULL), + PixelShader(NULL), + VertexShader(NULL), + VertexShaderTimewarp(NULL), + //screenSize(), + ResolutionInPixels(0,0) + //eachEye[] +{ + ScreenSize.w = 0; + ScreenSize.h = 0; + InitLatencyTester(renderState); +} + + +/**********************************************/ +DistortionRenderer::~DistortionRenderer() +{ + //Release any memory + eachEye[0].dxIndices->Release(); + eachEye[0].dxVerts->Release(); + eachEye[1].dxIndices->Release(); + eachEye[1].dxVerts->Release(); +} + + +/******************************************************************************/ +bool DistortionRenderer::Initialize(const ovrRenderAPIConfig* apiConfig) +{ + ///QUESTION - what is returned bool for??? Are we happy with this true, if not config. + const ovrD3D9Config * config = (const ovrD3D9Config*)apiConfig; + if (!config) return true; + if (!config->D3D9.pDevice) return false; + + //Glean all the required variables from the input structures + Device = config->D3D9.pDevice; + SwapChain = config->D3D9.pSwapChain; + ScreenSize = config->D3D9.Header.RTSize; + + GfxState = *new GraphicsState(Device, RState.DistortionCaps); + + CreateVertexDeclaration(); + CreateDistortionShaders(); + CreateDistortionModels(); + + return true; +} + +void DistortionRenderer::InitLatencyTester(const HMDRenderState& RenderState) +{ + ResolutionInPixels = RenderState.OurHMDInfo.ResolutionInPixels; +} + + +/**************************************************************/ +void DistortionRenderer::SubmitEye(int eyeId, const ovrTexture* eyeTexture) +{ + //Doesn't do a lot in here?? + const ovrD3D9Texture* tex = (const ovrD3D9Texture*)eyeTexture; + + //Write in values + eachEye[eyeId].texture = tex->D3D9.pTexture; + + // Its only at this point we discover what the viewport of the texture is. + // because presumably we allow users to realtime adjust the resolution. + eachEye[eyeId].TextureSize = tex->D3D9.Header.TextureSize; + eachEye[eyeId].RenderViewport = tex->D3D9.Header.RenderViewport; + + const ovrEyeRenderDesc& erd = RState.EyeRenderDesc[eyeId]; + + ovrHmd_GetRenderScaleAndOffset( erd.Fov, + eachEye[eyeId].TextureSize, eachEye[eyeId].RenderViewport, + eachEye[eyeId].UVScaleOffset ); + + if (RState.DistortionCaps & ovrDistortionCap_FlipInput) + { + eachEye[eyeId].UVScaleOffset[0].y = -eachEye[eyeId].UVScaleOffset[0].y; + eachEye[eyeId].UVScaleOffset[1].y = 1.0f - eachEye[eyeId].UVScaleOffset[1].y; + } +} + +void DistortionRenderer::renderEndFrame() +{ + RenderBothDistortionMeshes(); + + if(RegisteredPostDistortionCallback) + RegisteredPostDistortionCallback(Device); + + if (LatencyTest2Active) + { + renderLatencyPixel(LatencyTest2DrawColor); + } +} + +/******************************************************************/ +void DistortionRenderer::EndFrame(bool swapBuffers) +{ + ///QUESTION : Clear the screen? + ///QUESTION : Ensure the screen is the render target + + // Don't spin if we are explicitly asked not to + if (RState.DistortionCaps & ovrDistortionCap_TimeWarp && + !(RState.DistortionCaps & ovrDistortionCap_ProfileNoTimewarpSpinWaits)) + { + if (!TimeManager.NeedDistortionTimeMeasurement()) + { + // Wait for timewarp distortion if it is time and Gpu idle + FlushGpuAndWaitTillTime(TimeManager.GetFrameTiming().TimewarpPointTime); + + renderEndFrame(); + } + else + { + // If needed, measure distortion time so that TimeManager can better estimate + // latency-reducing time-warp wait timing. + WaitUntilGpuIdle(); + double distortionStartTime = ovr_GetTimeInSeconds(); + + renderEndFrame(); + + WaitUntilGpuIdle(); + TimeManager.AddDistortionTimeMeasurement(ovr_GetTimeInSeconds() - distortionStartTime); + } + } + else + { + renderEndFrame(); + } + + if (LatencyTestActive) + { + renderLatencyQuad(LatencyTestDrawColor); + } + + if (swapBuffers) + { + if (SwapChain) + { + SwapChain->Present(NULL, NULL, NULL, NULL, 0); + } + else + { + Device->Present( NULL, NULL, NULL, NULL ); + } + + // Force GPU to flush the scene, resulting in the lowest possible latency. + // It's critical that this flush is *after* present. + // Doesn't need to be done if running through the Oculus driver. + if (RState.OurHMDInfo.InCompatibilityMode && + !(RState.DistortionCaps & ovrDistortionCap_ProfileNoTimewarpSpinWaits)) + { + WaitUntilGpuIdle(); + } + } +} + + +void DistortionRenderer::WaitUntilGpuIdle() +{ + if(Device) + { + IDirect3DQuery9* pEventQuery=NULL ; + Device->CreateQuery(D3DQUERYTYPE_EVENT, &pEventQuery) ; + + if(pEventQuery!=NULL) + { + pEventQuery->Issue(D3DISSUE_END) ; + while(S_FALSE == pEventQuery->GetData(NULL, 0, D3DGETDATA_FLUSH)){} + pEventQuery->Release(); + } + } +} + +double DistortionRenderer::FlushGpuAndWaitTillTime(double absTime) +{ + double initialTime = ovr_GetTimeInSeconds(); + if (initialTime >= absTime) + return 0.0; + + WaitUntilGpuIdle(); + + return WaitTillTime(absTime); +} + + +//----------------------------------------------------------------------------- +// Latency Tester Quad + +static void ConvertSRGB(unsigned char c[3]) +{ + for (int i = 0; i < 3; ++i) + { + double d = (double)c[i]; + double ds = d / 255.; + + if (ds <= 0.04045) + { + d /= 12.92; + } + else + { + d = 255. * pow((ds + 0.055) / 1.055, 2.4); + } + + int color = (int)d; + if (color < 0) + { + color = 0; + } + else if (color > 255) + { + color = 255; + } + + c[i] = (unsigned char)color; + } +} + +void DistortionRenderer::renderLatencyQuad(unsigned char* color) +{ + D3DRECT rect = { ResolutionInPixels.w / 4, ResolutionInPixels.h / 4, ResolutionInPixels.w * 3 / 4, ResolutionInPixels.h * 3 / 4 }; + unsigned char c[3] = { color[0], color[1], color[2] }; + + if (RState.DistortionCaps & ovrDistortionCap_SRGB) + { + ConvertSRGB(c); + } + + Device->Clear(1, &rect, D3DCLEAR_TARGET, D3DCOLOR_RGBA(c[0], c[1], c[2], 255), 1, 0); +} + +#ifdef OVR_BUILD_DEBUG +#define OVR_LATENCY_PIXEL_SIZE 20 +#else +#define OVR_LATENCY_PIXEL_SIZE 5 +#endif + +void DistortionRenderer::renderLatencyPixel(unsigned char* color) +{ + D3DRECT rect = { ResolutionInPixels.w - OVR_LATENCY_PIXEL_SIZE, 0, ResolutionInPixels.w, OVR_LATENCY_PIXEL_SIZE }; + unsigned char c[3] = { color[0], color[1], color[2] }; + + if (RState.DistortionCaps & ovrDistortionCap_SRGB) + { + ConvertSRGB(c); + } + + Device->Clear(1, &rect, D3DCLEAR_TARGET, D3DCOLOR_RGBA(c[0], c[1], c[2], 255), 1, 0); +} + + +//----------------------------------------------------------------------------- +// GraphicsState + +DistortionRenderer::GraphicsState::GraphicsState(IDirect3DDevice9* d, unsigned distortionCaps) +: Device(d) +, NumSavedStates(0) +, DistortionCaps(distortionCaps) +{ + #if defined(OVR_BUILD_DEBUG) + memset(SavedState, 0, sizeof(SavedState)); + #endif +} + +void DistortionRenderer::GraphicsState::RecordAndSetState(int which, int type, DWORD newValue) +{ + SavedStateType * sst = &SavedState[NumSavedStates++]; + sst->which = which; + sst->type = type; + if (which == 0) + { + Device->GetSamplerState(0, (D3DSAMPLERSTATETYPE)type, &sst->valueToRevertTo); + Device->SetSamplerState(0, (D3DSAMPLERSTATETYPE)type, newValue); + } + else + { + Device->GetRenderState((D3DRENDERSTATETYPE)type, &sst->valueToRevertTo); + Device->SetRenderState((D3DRENDERSTATETYPE)type, newValue); + } +} + +void DistortionRenderer::GraphicsState::Save() +{ + //Record and set rasterizer and sampler states. + + NumSavedStates=0; + + RecordAndSetState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR ); + RecordAndSetState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR ); + RecordAndSetState(0, D3DSAMP_MIPFILTER, D3DTEXF_LINEAR ); + RecordAndSetState(0, D3DSAMP_BORDERCOLOR, 0x000000 ); + RecordAndSetState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_BORDER ); + RecordAndSetState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_BORDER ); + RecordAndSetState(0, D3DSAMP_SRGBTEXTURE, (DistortionCaps & ovrDistortionCap_SRGB) ? TRUE : FALSE ); + + RecordAndSetState(1, D3DRS_MULTISAMPLEANTIALIAS, FALSE ); + RecordAndSetState(1, D3DRS_DITHERENABLE, FALSE ); + RecordAndSetState(1, D3DRS_ZENABLE, FALSE ); + RecordAndSetState(1, D3DRS_ZWRITEENABLE, TRUE ); + RecordAndSetState(1, D3DRS_ZFUNC, D3DCMP_LESSEQUAL ); + RecordAndSetState(1, D3DRS_CULLMODE , D3DCULL_CCW ); + RecordAndSetState(1, D3DRS_ALPHABLENDENABLE , FALSE ); + RecordAndSetState(1, D3DRS_DEPTHBIAS , 0 ); + RecordAndSetState(1, D3DRS_SRCBLEND , D3DBLEND_SRCALPHA ); + RecordAndSetState(1, D3DRS_DESTBLEND , D3DBLEND_INVSRCALPHA ); + RecordAndSetState(1, D3DRS_FILLMODE, D3DFILL_SOLID ); + RecordAndSetState(1, D3DRS_ALPHATESTENABLE, FALSE); + RecordAndSetState(1, D3DRS_DEPTHBIAS , 0 ); + RecordAndSetState(1, D3DRS_LIGHTING, FALSE ); + RecordAndSetState(1, D3DRS_FOGENABLE, FALSE ); + RecordAndSetState(1, D3DRS_SRGBWRITEENABLE, (DistortionCaps & ovrDistortionCap_SRGB) ? TRUE : FALSE ); +} + + +void DistortionRenderer::GraphicsState::Restore() +{ + for (int i = 0; i < NumSavedStates; i++) + { + SavedStateType * sst = &SavedState[i]; + if (sst->which == 0) + { + Device->SetSamplerState(0, (D3DSAMPLERSTATETYPE)sst->type, sst->valueToRevertTo); + } + else + { + Device->SetRenderState((D3DRENDERSTATETYPE)sst->type, sst->valueToRevertTo); + } + } +} + + +}}} // OVR::CAPI::D3D1X + + |