Merge pull request #7316 from ZappoMan/toggleOverlay

Repair Toggle Overlays

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

@@ -11,6 +11,7 @@
 #include <memory>
 #include <math.h>
 
+#include <QtCore/QTimer>
 #include <QtCore/QThread>
 #include <QtWidgets/QApplication>
 #include <QtWidgets/QDesktopWidget>
@@ -414,13 +415,39 @@ void CompositorHelper::updateTooltips() {
 }
 
 static const float FADE_DURATION = 500.0f;
+static const float FADE_IN_ALPHA = 1.0f;
+static const float FADE_OUT_ALPHA = 0.0f;
+
+void CompositorHelper::startFadeFailsafe(float endValue) {
+    _fadeStarted = usecTimestampNow();
+    _fadeFailsafeEndValue = endValue;
+
+    const int SLIGHT_DELAY = 10;
+    QTimer::singleShot(FADE_DURATION + SLIGHT_DELAY, [this]{
+        checkFadeFailsafe();
+    });
+}
+
+void CompositorHelper::checkFadeFailsafe() {
+    auto elapsedInFade = usecTimestampNow() - _fadeStarted;
+    if (elapsedInFade > FADE_DURATION) {
+        setAlpha(_fadeFailsafeEndValue);
+    }
+}
+
 void CompositorHelper::fadeIn() {
     _fadeInAlpha = true;
 
     _alphaPropertyAnimation->setDuration(FADE_DURATION);
     _alphaPropertyAnimation->setStartValue(_alpha);
-    _alphaPropertyAnimation->setEndValue(1.0f);
+    _alphaPropertyAnimation->setEndValue(FADE_IN_ALPHA);
     _alphaPropertyAnimation->start();
+
+    // Sometimes, this "QPropertyAnimation" fails to complete the animation, and we end up with a partially faded
+    // state. So we will also have this fail-safe, where we record the timestamp of the fadeRequest, and the target
+    // value of the fade, and if after that time we still haven't faded all the way, we will kick it to the final
+    // fade value
+    startFadeFailsafe(FADE_IN_ALPHA);
 }
 
 void CompositorHelper::fadeOut() {
@@ -428,8 +455,9 @@ void CompositorHelper::fadeOut() {
 
     _alphaPropertyAnimation->setDuration(FADE_DURATION);
     _alphaPropertyAnimation->setStartValue(_alpha);
-    _alphaPropertyAnimation->setEndValue(0.0f);
+    _alphaPropertyAnimation->setEndValue(FADE_OUT_ALPHA);
     _alphaPropertyAnimation->start();
+    startFadeFailsafe(FADE_OUT_ALPHA);
 }
 
 void CompositorHelper::toggle() {

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

@@ -145,6 +145,11 @@ private:
     float _fadeInAlpha { true };
     float _oculusUIRadius { 1.0f };
 
+    quint64 _fadeStarted { 0 };
+    float _fadeFailsafeEndValue { 1.0f };
+    void checkFadeFailsafe();
+    void startFadeFailsafe(float endValue);
+
     int _reticleQuad;
 
     int _previousBorderWidth { -1 };

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

@@ -296,6 +296,9 @@ void OpenGLDisplayPlugin::customizeContext() {
         if (uniform.Name() == "mvp") {
             _mvpUniform = uniform.Index();
         }
+        if (uniform.Name() == "alpha") {
+            _alphaUniform = uniform.Index();
+        }
         uniforms.Next();
     }
   
@@ -406,33 +409,53 @@ void OpenGLDisplayPlugin::updateFramerate() {
 
 void OpenGLDisplayPlugin::compositeOverlay() {
     using namespace oglplus;
-    // Overlay draw
-    if (isStereo()) {
-        Uniform<glm::mat4>(*_program, _mvpUniform).Set(mat4());
-        for_each_eye([&](Eye eye) {
-            eyeViewport(eye);
-            drawUnitQuad();
-        });
-    } else {
+
+    auto compositorHelper = DependencyManager::get<CompositorHelper>();
+
+    // check the alpha
+    auto overlayAlpha = compositorHelper->getAlpha();
+    if (overlayAlpha > 0.0f) {
+        // set the alpha
+        Uniform<float>(*_program, _alphaUniform).Set(overlayAlpha);
+
         // Overlay draw
-        Uniform<glm::mat4>(*_program, _mvpUniform).Set(mat4());
-        drawUnitQuad();
+        if (isStereo()) {
+            Uniform<glm::mat4>(*_program, _mvpUniform).Set(mat4());
+            for_each_eye([&](Eye eye) {
+                eyeViewport(eye);
+                drawUnitQuad();
+            });
+        } else {
+            // Overlay draw
+            Uniform<glm::mat4>(*_program, _mvpUniform).Set(mat4());
+            drawUnitQuad();
+        }
     }
+    Uniform<float>(*_program, _alphaUniform).Set(1.0);
 }
 
 void OpenGLDisplayPlugin::compositePointer() {
     using namespace oglplus;
     auto compositorHelper = DependencyManager::get<CompositorHelper>();
-    Uniform<glm::mat4>(*_program, _mvpUniform).Set(compositorHelper->getReticleTransform(glm::mat4()));
-    if (isStereo()) {
-        for_each_eye([&](Eye eye) {
-            eyeViewport(eye);
+
+    // check the alpha
+    auto overlayAlpha = compositorHelper->getAlpha();
+    if (overlayAlpha > 0.0f) {
+        // set the alpha
+        Uniform<float>(*_program, _alphaUniform).Set(overlayAlpha);
+
+        Uniform<glm::mat4>(*_program, _mvpUniform).Set(compositorHelper->getReticleTransform(glm::mat4()));
+        if (isStereo()) {
+            for_each_eye([&](Eye eye) {
+                eyeViewport(eye);
+                drawUnitQuad();
+            });
+        } else {
             drawUnitQuad();
-        });
-    } else {
-        drawUnitQuad();
+        }
     }
     Uniform<glm::mat4>(*_program, _mvpUniform).Set(mat4());
+    Uniform<float>(*_program, _alphaUniform).Set(1.0);
 }
 
 void OpenGLDisplayPlugin::compositeLayers() {

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

@@ -86,6 +86,7 @@ protected:
 
     ProgramPtr _program;
     int32_t _mvpUniform { -1 };
+    int32_t _alphaUniform { -1 };
     ShapeWrapperPtr _plane;
 
     mutable Mutex _mutex;

libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp

@@ -62,30 +62,50 @@ void HmdDisplayPlugin::uncustomizeContext() {
 
 void HmdDisplayPlugin::compositeOverlay() {
     using namespace oglplus;
-    _sphereSection->Use();
-    for_each_eye([&](Eye eye) {
-        eyeViewport(eye);
-        auto modelView = glm::inverse(_currentRenderEyePoses[eye]); // *glm::translate(mat4(), vec3(0, 0, -1));
-        auto mvp = _eyeProjections[eye] * modelView;
-        Uniform<glm::mat4>(*_program, _mvpUniform).Set(mvp);
-        _sphereSection->Draw();
-    });
+    auto compositorHelper = DependencyManager::get<CompositorHelper>();
+
+    // check the alpha
+    auto overlayAlpha = compositorHelper->getAlpha();
+    if (overlayAlpha > 0.0f) {
+        // set the alpha
+        Uniform<float>(*_program, _alphaUniform).Set(overlayAlpha);
+
+        _sphereSection->Use();
+        for_each_eye([&](Eye eye) {
+            eyeViewport(eye);
+            auto modelView = glm::inverse(_currentRenderEyePoses[eye]); // *glm::translate(mat4(), vec3(0, 0, -1));
+            auto mvp = _eyeProjections[eye] * modelView;
+            Uniform<glm::mat4>(*_program, _mvpUniform).Set(mvp);
+            _sphereSection->Draw();
+        });
+    }
+    Uniform<float>(*_program, _alphaUniform).Set(1.0);
 }
 
 void HmdDisplayPlugin::compositePointer() {
-    //Mouse Pointer
+    using namespace oglplus;
+
     auto compositorHelper = DependencyManager::get<CompositorHelper>();
-    _plane->Use();
-    // Reconstruct the headpose from the eye poses
-    auto headPosition = (vec3(_currentRenderEyePoses[Left][3]) + vec3(_currentRenderEyePoses[Right][3])) / 2.0f;
-    for_each_eye([&](Eye eye) {
-        using namespace oglplus;
-        eyeViewport(eye);
-        auto reticleTransform = compositorHelper->getReticleTransform(_currentRenderEyePoses[eye], headPosition);
-        auto mvp = _eyeProjections[eye] * reticleTransform;
-        Uniform<glm::mat4>(*_program, _mvpUniform).Set(mvp);
-        _plane->Draw();
-    });
+
+    // check the alpha
+    auto overlayAlpha = compositorHelper->getAlpha();
+    if (overlayAlpha > 0.0f) {
+        // set the alpha
+        Uniform<float>(*_program, _alphaUniform).Set(overlayAlpha);
+
+        // Mouse pointer
+        _plane->Use();
+        // Reconstruct the headpose from the eye poses
+        auto headPosition = (vec3(_currentRenderEyePoses[Left][3]) + vec3(_currentRenderEyePoses[Right][3])) / 2.0f;
+        for_each_eye([&](Eye eye) {
+            eyeViewport(eye);
+            auto reticleTransform = compositorHelper->getReticleTransform(_currentRenderEyePoses[eye], headPosition);
+            auto mvp = _eyeProjections[eye] * reticleTransform;
+            Uniform<glm::mat4>(*_program, _mvpUniform).Set(mvp);
+            _plane->Draw();
+        });
+    }
+    Uniform<float>(*_program, _alphaUniform).Set(1.0);
 }
 
 void HmdDisplayPlugin::internalPresent() {

libraries/gl/src/gl/OglplusHelpers.cpp

@@ -33,6 +33,7 @@ static const char * SIMPLE_TEXTURED_FS = R"FS(#version 410 core
 #pragma line __LINE__
 
 uniform sampler2D sampler;
+uniform float alpha = 1.0;
 
 in vec2 vTexCoord;
 out vec4 FragColor;
@@ -40,6 +41,7 @@ out vec4 FragColor;
 void main() {
 
     FragColor = texture(sampler, vTexCoord);
+    FragColor.a *= alpha;
 }
 
 )FS";