ovr_sdk

annotate LibOVR/Src/CAPI/CAPI_DistortionRenderer.h @ 3:f12a8f74fe1f

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added the Xcode project
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 21 Jan 2015 11:37:50 +0200
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nuclear@0 1 /************************************************************************************
nuclear@0 2
nuclear@0 3 Filename : CAPI_DistortionRenderer.h
nuclear@0 4 Content : Abstract interface for platform-specific rendering of distortion
nuclear@0 5 Created : February 2, 2014
nuclear@0 6 Authors : Michael Antonov
nuclear@0 7
nuclear@0 8 Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved.
nuclear@0 9
nuclear@0 10 Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
nuclear@0 11 you may not use the Oculus VR Rift SDK except in compliance with the License,
nuclear@0 12 which is provided at the time of installation or download, or which
nuclear@0 13 otherwise accompanies this software in either electronic or hard copy form.
nuclear@0 14
nuclear@0 15 You may obtain a copy of the License at
nuclear@0 16
nuclear@0 17 http://www.oculusvr.com/licenses/LICENSE-3.2
nuclear@0 18
nuclear@0 19 Unless required by applicable law or agreed to in writing, the Oculus VR SDK
nuclear@0 20 distributed under the License is distributed on an "AS IS" BASIS,
nuclear@0 21 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nuclear@0 22 See the License for the specific language governing permissions and
nuclear@0 23 limitations under the License.
nuclear@0 24
nuclear@0 25 ************************************************************************************/
nuclear@0 26
nuclear@0 27 #ifndef OVR_CAPI_DistortionRenderer_h
nuclear@0 28 #define OVR_CAPI_DistortionRenderer_h
nuclear@0 29
nuclear@0 30 #include "CAPI_HMDRenderState.h"
nuclear@0 31 #include "CAPI_FrameTimeManager.h"
nuclear@0 32
nuclear@0 33 typedef void (*PostDistortionCallback)(void* pRenderContext);
nuclear@0 34
nuclear@0 35 namespace OVR { namespace CAPI {
nuclear@0 36
nuclear@0 37 //-------------------------------------------------------------------------------------
nuclear@0 38 // ***** CAPI::DistortionRenderer
nuclear@0 39
nuclear@0 40 // DistortionRenderer implements rendering of distortion and other overlay elements
nuclear@0 41 // in platform-independent way.
nuclear@0 42 // Platform-specific renderer back ends for CAPI are derived from this class.
nuclear@0 43
nuclear@0 44 class DistortionRenderer : public RefCountBase<DistortionRenderer>
nuclear@0 45 {
nuclear@0 46 // Quiet assignment compiler warning.
nuclear@0 47 void operator = (const DistortionRenderer&) { }
nuclear@0 48 public:
nuclear@0 49
nuclear@0 50 DistortionRenderer(ovrRenderAPIType api, ovrHmd hmd,
nuclear@0 51 FrameTimeManager& timeManager,
nuclear@0 52 const HMDRenderState& renderState) :
nuclear@0 53 LastUsedOverdriveTextureIndex(-1),
nuclear@0 54 LatencyTestActive(false),
nuclear@0 55 LatencyTest2Active(false),
nuclear@0 56 RenderAPI(api),
nuclear@0 57 HMD(hmd),
nuclear@0 58 TimeManager(timeManager),
nuclear@0 59 RState(renderState),
nuclear@0 60 GfxState(),
nuclear@0 61 RegisteredPostDistortionCallback(NULL)
nuclear@0 62 {
nuclear@0 63 #ifdef OVR_OS_WIN32
nuclear@0 64 timer = CreateWaitableTimer(NULL, TRUE, NULL);
nuclear@0 65 OVR_ASSERT(timer != NULL);
nuclear@0 66 #endif
nuclear@0 67 }
nuclear@0 68 virtual ~DistortionRenderer()
nuclear@0 69 {
nuclear@0 70 }
nuclear@0 71
nuclear@0 72
nuclear@0 73 // Configures the Renderer based on externally passed API settings. Must be
nuclear@0 74 // called before use.
nuclear@0 75 // Under D3D, apiConfig includes D3D Device pointer, back buffer and other
nuclear@0 76 // needed structures.
nuclear@0 77 virtual bool Initialize(const ovrRenderAPIConfig* apiConfig) = 0;
nuclear@0 78
nuclear@0 79 // Submits one eye texture for rendering. This is in the separate method to
nuclear@0 80 // allow "submit as you render" scenarios on horizontal screens where one
nuclear@0 81 // eye can be scanned out before the other.
nuclear@0 82 virtual void SubmitEye(int eyeId, const ovrTexture* eyeTexture) = 0;
nuclear@0 83
nuclear@0 84 // Finish the frame, optionally swapping buffers.
nuclear@0 85 // Many implementations may actually apply the distortion here.
nuclear@0 86 virtual void EndFrame(bool swapBuffers) = 0;
nuclear@0 87
nuclear@0 88 void RegisterPostDistortionCallback(PostDistortionCallback postDistortionCallback)
nuclear@0 89 {
nuclear@0 90 RegisteredPostDistortionCallback = postDistortionCallback;
nuclear@0 91 }
nuclear@0 92
nuclear@0 93 // Stores the current graphics pipeline state so it can be restored later.
nuclear@0 94 void SaveGraphicsState() { if (GfxState && !(RState.DistortionCaps & ovrDistortionCap_NoRestore)) GfxState->Save(); }
nuclear@0 95
nuclear@0 96 // Restores the saved graphics pipeline state.
nuclear@0 97 void RestoreGraphicsState() { if (GfxState && !(RState.DistortionCaps & ovrDistortionCap_NoRestore)) GfxState->Restore(); }
nuclear@0 98
nuclear@0 99 // *** Creation Factory logic
nuclear@0 100
nuclear@0 101 ovrRenderAPIType GetRenderAPI() const { return RenderAPI; }
nuclear@0 102
nuclear@0 103 // Creation function for this interface, registered for API.
nuclear@0 104 typedef DistortionRenderer* (*CreateFunc)(ovrHmd hmd,
nuclear@0 105 FrameTimeManager &timeManager,
nuclear@0 106 const HMDRenderState& renderState);
nuclear@0 107
nuclear@0 108 static CreateFunc APICreateRegistry[ovrRenderAPI_Count];
nuclear@0 109
nuclear@0 110 // Color is expected to be 3 byte RGB
nuclear@0 111 void SetLatencyTestColor(unsigned char* color);
nuclear@0 112 void SetLatencyTest2Color(unsigned char* color);
nuclear@0 113
nuclear@0 114 protected:
nuclear@0 115 // Used for pixel luminance overdrive on DK2 displays
nuclear@0 116 // A copy of back buffer images will be ping ponged
nuclear@0 117 // TODO: figure out 0 dynamically based on DK2 latency?
nuclear@0 118 static const int NumOverdriveTextures = 2;
nuclear@0 119 int LastUsedOverdriveTextureIndex;
nuclear@0 120
nuclear@0 121 bool LatencyTestActive;
nuclear@0 122 unsigned char LatencyTestDrawColor[3];
nuclear@0 123 bool LatencyTest2Active;
nuclear@0 124 unsigned char LatencyTest2DrawColor[3];
nuclear@0 125
nuclear@0 126 bool IsOverdriveActive()
nuclear@0 127 {
nuclear@0 128 // doesn't make sense to use overdrive when vsync is disabled as we cannot guarantee
nuclear@0 129 // when the rendered frame will be displayed
nuclear@0 130 return LastUsedOverdriveTextureIndex >= 0 &&
nuclear@0 131 !((RState.EnabledHmdCaps & ovrHmdCap_NoVSync) > 0) &&
nuclear@0 132 (RState.DistortionCaps & ovrDistortionCap_Chromatic);
nuclear@0 133 }
nuclear@0 134
nuclear@0 135 void GetOverdriveScales(float& outRiseScale, float& outFallScale);
nuclear@0 136
nuclear@0 137 double WaitTillTime(double absTime);
nuclear@0 138
nuclear@0 139 #ifdef OVR_OS_WIN32
nuclear@0 140 HANDLE timer;
nuclear@0 141 LARGE_INTEGER waitableTimerInterval;
nuclear@0 142 #endif
nuclear@0 143
nuclear@0 144 class GraphicsState : public RefCountBase<GraphicsState>
nuclear@0 145 {
nuclear@0 146 public:
nuclear@0 147 GraphicsState() : IsValid(false) {}
nuclear@0 148 virtual ~GraphicsState() {}
nuclear@0 149 virtual void Save() = 0;
nuclear@0 150 virtual void Restore() = 0;
nuclear@0 151
nuclear@0 152 protected:
nuclear@0 153 bool IsValid;
nuclear@0 154 };
nuclear@0 155
nuclear@0 156 const ovrRenderAPIType RenderAPI;
nuclear@0 157 const ovrHmd HMD;
nuclear@0 158 FrameTimeManager& TimeManager;
nuclear@0 159 const HMDRenderState& RState;
nuclear@0 160 Ptr<GraphicsState> GfxState;
nuclear@0 161 PostDistortionCallback RegisteredPostDistortionCallback;
nuclear@0 162 };
nuclear@0 163
nuclear@0 164 }} // namespace OVR::CAPI
nuclear@0 165
nuclear@0 166
nuclear@0 167 #endif // OVR_CAPI_DistortionRenderer_h