Plugins target frame rate and period.

libraries/display-plugins/src/display-plugins/Basic2DWindowOpenGLDisplayPlugin.cpp

@@ -139,7 +139,8 @@ void Basic2DWindowOpenGLDisplayPlugin::updateFramerate() {
         } else if (FRAMERATE_30 == actionText) {
             _framerateTarget = 30;
         }
-    } 
+    }
+    _inverseFrameRate = _framerateTarget ? 1.0f / (float) _framerateTarget : 1.0f / TARGET_FRAMERATE_Basic2DWindowOpenGL; // not truncated
 
     int newInterval = getDesiredInterval();
     qDebug() << newInterval;

libraries/display-plugins/src/display-plugins/Basic2DWindowOpenGLDisplayPlugin.h

@@ -9,6 +9,8 @@
 
 #include "WindowOpenGLDisplayPlugin.h"
 
+#define TARGET_FRAMERATE_Basic2DWindowOpenGL 60.0f
+
 class QScreen;
 class Basic2DWindowOpenGLDisplayPlugin : public WindowOpenGLDisplayPlugin {
     Q_OBJECT
@@ -16,6 +18,9 @@ class Basic2DWindowOpenGLDisplayPlugin : public WindowOpenGLDisplayPlugin {
 public:
     virtual const QString & getName() const override;
 
+    virtual float getTargetFrameRate() { return  _framerateTarget ? (float) _framerateTarget : TARGET_FRAMERATE_Basic2DWindowOpenGL; }
+    virtual float getTargetFramePeriod() { return _inverseFrameRate; }
+
     virtual void activate() override;
     virtual void deactivate() override;
 
@@ -33,4 +38,5 @@ private:
     QScreen* getFullscreenTarget();
     uint32_t _framerateTarget{ 0 };
     int _fullscreenTarget{ -1 };
+    float _inverseFrameRate{ 1.0f }; //seconds
 };

libraries/display-plugins/src/display-plugins/openvr/OpenVrDisplayPlugin.h

@@ -14,12 +14,17 @@
 
 #include "../WindowOpenGLDisplayPlugin.h"
 
+#define TARGET_RATE_OpenVr 90.0f;  // FIXME: get from sdk tracked device property? This number is vive-only.
+
 class OpenVrDisplayPlugin : public WindowOpenGLDisplayPlugin {
 public:
     virtual bool isSupported() const override;
     virtual const QString & getName() const override;
     virtual bool isHmd() const override { return true; }
 
+    virtual float getTargetFrameRate() { return TARGET_RATE_OpenVr; }
+    virtual float getTargetFramePeriod() { return 1.0f / TARGET_RATE_OpenVr; }
+
     virtual void activate() override;
     virtual void deactivate() override;
 

libraries/plugins/src/plugins/DisplayPlugin.h

@@ -57,6 +57,8 @@ public:
     /// By default, all HMDs are stereo
     virtual bool isStereo() const { return isHmd(); }
     virtual bool isThrottled() const { return false; }
+    virtual float getTargetFrameRate() { return 0.0f; }
+    virtual float getTargetFramePeriod() { return 0.0f; }
 
     // Rendering support
 

plugins/oculus/src/OculusDisplayPlugin.h

@@ -12,12 +12,17 @@
 struct SwapFramebufferWrapper;
 using SwapFboPtr = QSharedPointer<SwapFramebufferWrapper>;
 
+#define TARGET_RATE_Oculus 75.0f;
+
 class OculusDisplayPlugin : public OculusBaseDisplayPlugin {
 public:
     virtual void activate() override;
     virtual void deactivate() override;
     virtual const QString & getName() const override;
 
+    virtual float getTargetFrameRate() { return TARGET_RATE_Oculus; }
+    virtual float getTargetFramePeriod() { return 1.0f / TARGET_RATE_Oculus; }
+
 protected:
     virtual void display(GLuint finalTexture, const glm::uvec2& sceneSize) override;
     virtual void customizeContext() override;

plugins/oculusLegacy/src/OculusLegacyDisplayPlugin.h

@@ -13,6 +13,8 @@
 
 #include <OVR_CAPI.h>
 
+#define TARGET_RATE_OculusLegacy 75.0f;
+
 class OculusLegacyDisplayPlugin : public WindowOpenGLDisplayPlugin {
 public:
     OculusLegacyDisplayPlugin();
@@ -25,6 +27,9 @@ public:
     virtual bool eventFilter(QObject* receiver, QEvent* event) override;
     virtual int getHmdScreen() const override;
 
+    virtual float getTargetFrameRate() { return TARGET_RATE_OculusLegacy; }
+    virtual float getTargetFramePeriod() { return 1.0f / TARGET_RATE_OculusLegacy; }
+
     // Stereo specific methods
     virtual bool isHmd() const override { return true; }
     virtual glm::mat4 getProjection(Eye eye, const glm::mat4& baseProjection) const override;