Implement automatic SV clipping

Clip SV to its ancestor clipping bounds. This enables
Z-above SurfaceView + scrolling containers to work more naturally

Replaces the hidden API of setEnableSurfaceClipping

Fixes: 298621623
Test: Sample app
Change-Id: Iaa862598e37065677f5ba163a5ac7a6fab2739ea

1 files changed, 20 insertions, 4 deletions

diff --git a/libs/hwui/Properties.cpp b/libs/hwui/Properties.cpp
index 5e5eb4a51b35..ad600d0bab93 100644
--- a/libs/hwui/Properties.cpp
+++ b/libs/hwui/Properties.cpp
@@ -20,15 +20,26 @@
 #ifdef __ANDROID__
 #include "HWUIProperties.sysprop.h"
 #endif
-#include "src/core/SkTraceEventCommon.h"
+#include <android-base/properties.h>
+#include <cutils/compiler.h>
+#include <log/log.h>
 
 #include <algorithm>
 #include <cstdlib>
 #include <optional>
 
-#include <android-base/properties.h>
-#include <cutils/compiler.h>
-#include <log/log.h>
+#include "src/core/SkTraceEventCommon.h"
+
+#ifdef __ANDROID__
+#include <com_android_graphics_hwui_flags.h>
+namespace hwui_flags = com::android::graphics::hwui::flags;
+#else
+namespace hwui_flags {
+constexpr bool clip_surfaceviews() {
+    return false;
+}
+}  // namespace hwui_flags
+#endif
 
 namespace android {
 namespace uirenderer {
@@ -92,6 +103,8 @@ bool Properties::isSystemOrPersistent = false;
 
 float Properties::maxHdrHeadroomOn8bit = 5.f;  // TODO: Refine this number
 
+bool Properties::clipSurfaceViews = false;
+
 StretchEffectBehavior Properties::stretchEffectBehavior = StretchEffectBehavior::ShaderHWUI;
 
 DrawingEnabled Properties::drawingEnabled = DrawingEnabled::NotInitialized;
@@ -159,6 +172,9 @@ bool Properties::load() {
     // call isDrawingEnabled to force loading of the property
     isDrawingEnabled();
 
+    clipSurfaceViews =
+            base::GetBoolProperty("debug.hwui.clip_surfaceviews", hwui_flags::clip_surfaceviews());
+
     return (prevDebugLayersUpdates != debugLayersUpdates) || (prevDebugOverdraw != debugOverdraw);
 }