commit 19c8f0e4fe37ffa86a7cbc879c23e4da2ff97e1c
author Lucas Dupin <dupin@google.com> Mon Nov 25 17:55:44 2019 -0800
committer Lucas Dupin <dupin@google.com> Mon Jan 20 12:32:18 2020 -0800
tree 47645400d625fa71de468c6ef510780056da8bcf
parent fbb86a6baec5b0e91a94413a629d7a49f000d28b

Add support for background blurs

Bug: 141640413
Fixes: 146384234
Test: adb shell setprop debug.sf.disableBlurs 1
Test: adb shell setprop debug.sf.gaussianBlur 0
Test: adb shell setprop ro.surface_flinger.supports_background_blur 1
Test: ./SurfaceFlinger_test --gtest_filter=Layer*Tests/Layer*Test.SetBackgroundBlur*
Test: ./librenderengine_test --gtest_filter=*BlurBackground*"
Test: atest SurfaceFlinger_test:SurfaceInterceptorTest#InterceptBackgroundBlurRadiusUpdateWorks
Change-Id: I5194c910fe7062f33e70943867012539e6c6626a

services/surfaceflinger/Layer.cpp

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 9c4a784..f4d4329 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -109,6 +109,7 @@
     mCurrentState.hdrMetadata.validTypes = 0;
     mCurrentState.surfaceDamageRegion = Region::INVALID_REGION;
     mCurrentState.cornerRadius = 0.0f;
+    mCurrentState.backgroundBlurRadius = 0;
     mCurrentState.api = -1;
     mCurrentState.hasColorTransform = false;
     mCurrentState.colorSpaceAgnostic = false;
@@ -448,6 +449,7 @@
 
     compositionState.blendMode = static_cast<Hwc2::IComposerClient::BlendMode>(blendMode);
     compositionState.alpha = alpha;
+    compositionState.backgroundBlurRadius = drawingState.backgroundBlurRadius;
 }
 
 void Layer::latchGeometry(compositionengine::LayerFECompositionState& compositionState) const {
@@ -575,6 +577,7 @@
 
     layerSettings.alpha = alpha;
     layerSettings.sourceDataspace = getDataSpace();
+    layerSettings.backgroundBlurRadius = getBackgroundBlurRadius();
     return layerSettings;
 }
 
@@ -1103,6 +1106,16 @@
     return true;
 }
 
+bool Layer::setBackgroundBlurRadius(int backgroundBlurRadius) {
+    if (mCurrentState.backgroundBlurRadius == backgroundBlurRadius) return false;
+
+    mCurrentState.sequence++;
+    mCurrentState.backgroundBlurRadius = backgroundBlurRadius;
+    mCurrentState.modified = true;
+    setTransactionFlags(eTransactionNeeded);
+    return true;
+}
+
 bool Layer::setMatrix(const layer_state_t::matrix22_t& matrix,
         bool allowNonRectPreservingTransforms) {
     ui::Transform t;
@@ -1873,6 +1886,10 @@
     return half4(color.r, color.g, color.b, getAlpha());
 }
 
+int32_t Layer::getBackgroundBlurRadius() const {
+    return getDrawingState().backgroundBlurRadius;
+}
+
 Layer::RoundedCornerState Layer::getRoundedCornerState() const {
     const auto& p = mDrawingParent.promote();
     if (p != nullptr) {