Add setBackdropRenderEffect for View and RenderNode.
support visual effects for backdrop contents of a View or RenderNode.
Test: added unit test & hwui_unit passes
Test: added BackdropBlurActivity in HwAccelerationTest, build & run it
Signed-off-by: Dongya Jiang <jiangdongya@coolpad.com>
Change-Id: If1ac1b8aee53667f175e8fa80ecfc7bdfa28173d
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index f17ae82..cbf6f26 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -22453,6 +22453,22 @@
}
/**
+ * Configure the {@link android.graphics.RenderEffect} to apply to the backdrop contents of this
+ * View. This will apply a visual effect to the result of the backdrop contents of this View
+ * before it is drawn. For example if
+ * {@link RenderEffect#createBlurEffect(float, float, RenderEffect, Shader.TileMode)}
+ * is provided, the previous content behind this View will be blurred before this View is drawn.
+ * @param renderEffect to be applied to the View. Passing null clears the previously configured
+ * {@link RenderEffect}
+ * @hide
+ */
+ public void setBackdropRenderEffect(@Nullable RenderEffect renderEffect) {
+ if (mRenderNode.setBackdropRenderEffect(renderEffect)) {
+ invalidateViewProperty(true, true);
+ }
+ }
+
+ /**
* Updates the {@link Paint} object used with the current layer (used only if the current
* layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint
* provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time
diff --git a/graphics/java/android/graphics/RenderNode.java b/graphics/java/android/graphics/RenderNode.java
index 2e91c24..15d26eb 100644
--- a/graphics/java/android/graphics/RenderNode.java
+++ b/graphics/java/android/graphics/RenderNode.java
@@ -971,6 +971,23 @@
}
/**
+ * Configure the {@link android.graphics.RenderEffect} to apply to the backdrop contents of
+ * this RenderNode. This will apply a visual effect to the result of the backdrop contents
+ * of this RenderNode before the RenderNode is drawn into the destination. For example if
+ * {@link RenderEffect#createBlurEffect(float, float, RenderEffect, Shader.TileMode)}
+ * is provided, the previous content behind this RenderNode will be blurred before the
+ * RenderNode is drawn in to the destination.
+ * @param renderEffect to be applied to the backdrop contents of this RenderNode. Passing
+ * null clears all previously configured RenderEffects
+ * @return True if the value changed, false if the new value was the same as the previous value.
+ * @hide
+ */
+ public boolean setBackdropRenderEffect(@Nullable RenderEffect renderEffect) {
+ return nSetBackdropRenderEffect(mNativeRenderNode,
+ renderEffect != null ? renderEffect.getNativeInstance() : 0);
+ }
+
+ /**
* Returns the translucency level of this display list.
*
* @return A value between 0.0f and 1.0f
@@ -1797,6 +1814,9 @@
private static native boolean nSetRenderEffect(long renderNode, long renderEffect);
@CriticalNative
+ private static native boolean nSetBackdropRenderEffect(long renderNode, long renderEffect);
+
+ @CriticalNative
private static native boolean nSetHasOverlappingRendering(long renderNode,
boolean hasOverlappingRendering);
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index db58147..b5e6f94 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -514,6 +514,7 @@
"canvas/CanvasOpRasterizer.cpp",
"effects/StretchEffect.cpp",
"effects/GainmapRenderer.cpp",
+ "pipeline/skia/BackdropFilterDrawable.cpp",
"pipeline/skia/HolePunch.cpp",
"pipeline/skia/SkiaDisplayList.cpp",
"pipeline/skia/SkiaRecordingCanvas.cpp",
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 1c39db3..1dd22cf 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -260,6 +260,12 @@
pushStagingDisplayListChanges(observer, info);
}
+ // always damageSelf when filtering backdrop content, or else the BackdropFilterDrawable will
+ // get a wrong snapshot of previous content.
+ if (mProperties.layerProperties().getBackdropImageFilter()) {
+ damageSelf(info);
+ }
+
if (mDisplayList) {
info.out.hasFunctors |= mDisplayList.hasFunctor();
mHasHolePunches = mDisplayList.hasHolePunches();
diff --git a/libs/hwui/RenderProperties.cpp b/libs/hwui/RenderProperties.cpp
index 0589f13..c537123 100644
--- a/libs/hwui/RenderProperties.cpp
+++ b/libs/hwui/RenderProperties.cpp
@@ -55,6 +55,12 @@
return true;
}
+bool LayerProperties::setBackdropImageFilter(SkImageFilter* imageFilter) {
+ if (mBackdropImageFilter.get() == imageFilter) return false;
+ mBackdropImageFilter = sk_ref_sp(imageFilter);
+ return true;
+}
+
bool LayerProperties::setFromPaint(const SkPaint* paint) {
bool changed = false;
changed |= setAlpha(static_cast<uint8_t>(PaintUtils::getAlphaDirect(paint)));
@@ -70,6 +76,7 @@
setXferMode(other.xferMode());
setColorFilter(other.getColorFilter());
setImageFilter(other.getImageFilter());
+ setBackdropImageFilter(other.getBackdropImageFilter());
mStretchEffect = other.mStretchEffect;
return *this;
}
diff --git a/libs/hwui/RenderProperties.h b/libs/hwui/RenderProperties.h
index 064ba7a..e358b57 100644
--- a/libs/hwui/RenderProperties.h
+++ b/libs/hwui/RenderProperties.h
@@ -97,8 +97,12 @@
bool setImageFilter(SkImageFilter* imageFilter);
+ bool setBackdropImageFilter(SkImageFilter* imageFilter);
+
SkImageFilter* getImageFilter() const { return mImageFilter.get(); }
+ SkImageFilter* getBackdropImageFilter() const { return mBackdropImageFilter.get(); }
+
const StretchEffect& getStretchEffect() const { return mStretchEffect; }
StretchEffect& mutableStretchEffect() { return mStretchEffect; }
@@ -129,6 +133,7 @@
SkBlendMode mMode;
sk_sp<SkColorFilter> mColorFilter;
sk_sp<SkImageFilter> mImageFilter;
+ sk_sp<SkImageFilter> mBackdropImageFilter;
StretchEffect mStretchEffect;
};
diff --git a/libs/hwui/jni/android_graphics_RenderNode.cpp b/libs/hwui/jni/android_graphics_RenderNode.cpp
index 8c7b9a4..2a218a2 100644
--- a/libs/hwui/jni/android_graphics_RenderNode.cpp
+++ b/libs/hwui/jni/android_graphics_RenderNode.cpp
@@ -243,6 +243,13 @@
return SET_AND_DIRTY(mutateLayerProperties().setImageFilter, imageFilter, RenderNode::GENERIC);
}
+static jboolean android_view_RenderNode_setBackdropRenderEffect(
+ CRITICAL_JNI_PARAMS_COMMA jlong renderNodePtr, jlong renderEffectPtr) {
+ SkImageFilter* imageFilter = reinterpret_cast<SkImageFilter*>(renderEffectPtr);
+ return SET_AND_DIRTY(mutateLayerProperties().setBackdropImageFilter, imageFilter,
+ RenderNode::GENERIC);
+}
+
static jboolean android_view_RenderNode_setHasOverlappingRendering(CRITICAL_JNI_PARAMS_COMMA jlong renderNodePtr,
bool hasOverlappingRendering) {
return SET_AND_DIRTY(setHasOverlappingRendering, hasOverlappingRendering,
@@ -792,6 +799,8 @@
{"nSetAlpha", "(JF)Z", (void*)android_view_RenderNode_setAlpha},
{"nSetRenderEffect", "(JJ)Z", (void*)android_view_RenderNode_setRenderEffect},
+ {"nSetBackdropRenderEffect", "(JJ)Z",
+ (void*)android_view_RenderNode_setBackdropRenderEffect},
{"nSetHasOverlappingRendering", "(JZ)Z",
(void*)android_view_RenderNode_setHasOverlappingRendering},
{"nSetUsageHint", "(JI)V", (void*)android_view_RenderNode_setUsageHint},
diff --git a/libs/hwui/pipeline/skia/BackdropFilterDrawable.cpp b/libs/hwui/pipeline/skia/BackdropFilterDrawable.cpp
new file mode 100644
index 0000000..ffad699
--- /dev/null
+++ b/libs/hwui/pipeline/skia/BackdropFilterDrawable.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "BackdropFilterDrawable.h"
+
+#include <SkImage.h>
+#include <SkSurface.h>
+
+#include "RenderNode.h"
+#include "RenderNodeDrawable.h"
+
+namespace android {
+namespace uirenderer {
+namespace skiapipeline {
+
+BackdropFilterDrawable::~BackdropFilterDrawable() {}
+
+bool BackdropFilterDrawable::prepareToDraw(SkCanvas* canvas, const RenderProperties& properties,
+ int backdropImageWidth, int backdropImageHeight) {
+ // the drawing bounds for blurred content.
+ mDstBounds.setWH(properties.getWidth(), properties.getHeight());
+
+ float alphaMultiplier = 1.0f;
+ RenderNodeDrawable::setViewProperties(properties, canvas, &alphaMultiplier, true);
+
+ // get proper subset for previous content.
+ canvas->getTotalMatrix().mapRect(&mImageSubset, mDstBounds);
+ SkRect imageSubset(mImageSubset);
+ // ensure the subset is inside bounds of previous content.
+ if (!mImageSubset.intersect(SkRect::MakeWH(backdropImageWidth, backdropImageHeight))) {
+ return false;
+ }
+
+ // correct the drawing bounds if subset was changed.
+ if (mImageSubset != imageSubset) {
+ SkMatrix inverse;
+ if (canvas->getTotalMatrix().invert(&inverse)) {
+ inverse.mapRect(&mDstBounds, mImageSubset);
+ }
+ }
+
+ // follow the alpha from the target RenderNode.
+ mPaint.setAlpha(properties.layerProperties().alpha() * alphaMultiplier);
+ return true;
+}
+
+void BackdropFilterDrawable::onDraw(SkCanvas* canvas) {
+ const RenderProperties& properties = mTargetRenderNode->properties();
+ auto* backdropFilter = properties.layerProperties().getBackdropImageFilter();
+ auto* surface = canvas->getSurface();
+ if (!backdropFilter || !surface) {
+ return;
+ }
+
+ auto backdropImage = surface->makeImageSnapshot();
+ // sync necessary properties from target RenderNode.
+ if (!prepareToDraw(canvas, properties, backdropImage->width(), backdropImage->height())) {
+ return;
+ }
+
+ auto imageSubset = mImageSubset.roundOut();
+ backdropImage =
+ backdropImage->makeWithFilter(canvas->recordingContext(), backdropFilter, imageSubset,
+ imageSubset, &mOutSubset, &mOutOffset);
+ canvas->drawImageRect(backdropImage, SkRect::Make(mOutSubset), mDstBounds,
+ SkSamplingOptions(SkFilterMode::kLinear), &mPaint,
+ SkCanvas::kStrict_SrcRectConstraint);
+}
+
+} // namespace skiapipeline
+} // namespace uirenderer
+} // namespace android
diff --git a/libs/hwui/pipeline/skia/BackdropFilterDrawable.h b/libs/hwui/pipeline/skia/BackdropFilterDrawable.h
new file mode 100644
index 0000000..9e35837
--- /dev/null
+++ b/libs/hwui/pipeline/skia/BackdropFilterDrawable.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <SkCanvas.h>
+#include <SkDrawable.h>
+#include <SkPaint.h>
+
+namespace android {
+namespace uirenderer {
+
+class RenderNode;
+class RenderProperties;
+
+namespace skiapipeline {
+
+/**
+ * This drawable captures it's backdrop content and render it with a
+ * image filter.
+ */
+class BackdropFilterDrawable : public SkDrawable {
+public:
+ BackdropFilterDrawable(RenderNode* renderNode, SkCanvas* canvas)
+ : mTargetRenderNode(renderNode), mBounds(canvas->getLocalClipBounds()) {}
+
+ ~BackdropFilterDrawable();
+
+private:
+ RenderNode* mTargetRenderNode;
+ SkPaint mPaint;
+
+ SkRect mDstBounds;
+ SkRect mImageSubset;
+ SkIRect mOutSubset;
+ SkIPoint mOutOffset;
+
+ /**
+ * Check all necessary properties before actual drawing.
+ * Return true if ready to draw.
+ */
+ bool prepareToDraw(SkCanvas* canvas, const RenderProperties& properties, int backdropImageWidth,
+ int backdropImageHeight);
+
+protected:
+ void onDraw(SkCanvas* canvas) override;
+
+ virtual SkRect onGetBounds() override { return mBounds; }
+ const SkRect mBounds;
+};
+
+} // namespace skiapipeline
+} // namespace uirenderer
+} // namespace android
diff --git a/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp b/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
index da4f66d..9d72c23 100644
--- a/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
+++ b/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
@@ -362,7 +362,7 @@
}
void RenderNodeDrawable::setViewProperties(const RenderProperties& properties, SkCanvas* canvas,
- float* alphaMultiplier) {
+ float* alphaMultiplier, bool ignoreLayer) {
if (properties.getLeft() != 0 || properties.getTop() != 0) {
canvas->translate(properties.getLeft(), properties.getTop());
}
@@ -378,7 +378,8 @@
canvas->concat(*properties.getTransformMatrix());
}
}
- if (Properties::getStretchEffectBehavior() == StretchEffectBehavior::UniformScale) {
+ if (Properties::getStretchEffectBehavior() == StretchEffectBehavior::UniformScale &&
+ !ignoreLayer) {
const StretchEffect& stretch = properties.layerProperties().getStretchEffect();
if (!stretch.isEmpty()) {
canvas->concat(
@@ -388,10 +389,10 @@
const bool isLayer = properties.effectiveLayerType() != LayerType::None;
int clipFlags = properties.getClippingFlags();
if (properties.getAlpha() < 1) {
- if (isLayer) {
+ if (isLayer && !ignoreLayer) {
clipFlags &= ~CLIP_TO_BOUNDS; // bounds clipping done by layer
}
- if (CC_LIKELY(isLayer || !properties.getHasOverlappingRendering())) {
+ if (CC_LIKELY(isLayer || !properties.getHasOverlappingRendering()) || ignoreLayer) {
*alphaMultiplier = properties.getAlpha();
} else {
// savelayer needed to create an offscreen buffer
diff --git a/libs/hwui/pipeline/skia/RenderNodeDrawable.h b/libs/hwui/pipeline/skia/RenderNodeDrawable.h
index c7582e7..818ac45 100644
--- a/libs/hwui/pipeline/skia/RenderNodeDrawable.h
+++ b/libs/hwui/pipeline/skia/RenderNodeDrawable.h
@@ -120,7 +120,7 @@
* Applies the rendering properties of a view onto a SkCanvas.
*/
static void setViewProperties(const RenderProperties& properties, SkCanvas* canvas,
- float* alphaMultiplier);
+ float* alphaMultiplier, bool ignoreLayer = false);
/**
* Stores transform on the canvas at time of recording and is used for
@@ -149,6 +149,11 @@
* display list that is searched for any render nodes with getProjectBackwards==true
*/
SkiaDisplayList* mProjectedDisplayList = nullptr;
+
+ /**
+ * Allow BackdropFilterDrawable to apply same render properties onto SkCanvas.
+ */
+ friend class BackdropFilterDrawable;
};
} // namespace skiapipeline
diff --git a/libs/hwui/pipeline/skia/SkiaRecordingCanvas.cpp b/libs/hwui/pipeline/skia/SkiaRecordingCanvas.cpp
index 3ca7eeb..58c14c1 100644
--- a/libs/hwui/pipeline/skia/SkiaRecordingCanvas.cpp
+++ b/libs/hwui/pipeline/skia/SkiaRecordingCanvas.cpp
@@ -37,6 +37,7 @@
#include "NinePatchUtils.h"
#include "RenderNode.h"
#include "pipeline/skia/AnimatedDrawables.h"
+#include "pipeline/skia/BackdropFilterDrawable.h"
#ifdef __ANDROID__ // Layoutlib does not support GL, Vulcan etc.
#include "pipeline/skia/GLFunctorDrawable.h"
#include "pipeline/skia/VkFunctorDrawable.h"
@@ -168,6 +169,14 @@
// Put Vulkan WebViews with non-rectangular clips in a HW layer
renderNode->mutateStagingProperties().setClipMayBeComplex(mRecorder.isClipMayBeComplex());
}
+
+ // draw backdrop filter drawable if needed.
+ if (renderNode->stagingProperties().layerProperties().getBackdropImageFilter()) {
+ auto* backdropFilterDrawable =
+ mDisplayList->allocateDrawable<BackdropFilterDrawable>(renderNode, asSkCanvas());
+ drawDrawable(backdropFilterDrawable);
+ }
+
drawDrawable(&renderNodeDrawable);
// use staging property, since recording on UI thread
diff --git a/libs/hwui/tests/unit/RenderNodeDrawableTests.cpp b/libs/hwui/tests/unit/RenderNodeDrawableTests.cpp
index dd95c4f..1e055c2 100644
--- a/libs/hwui/tests/unit/RenderNodeDrawableTests.cpp
+++ b/libs/hwui/tests/unit/RenderNodeDrawableTests.cpp
@@ -14,20 +14,22 @@
* limitations under the License.
*/
-#include <VectorDrawable.h>
-#include <gtest/gtest.h>
-
#include <SkBlendMode.h>
#include <SkClipStack.h>
#include <SkSurface_Base.h>
+#include <VectorDrawable.h>
+#include <gtest/gtest.h>
+#include <include/effects/SkImageFilters.h>
#include <string.h>
+
#include "AnimationContext.h"
#include "DamageAccumulator.h"
#include "FatalTestCanvas.h"
#include "IContextFactory.h"
-#include "hwui/Paint.h"
#include "RecordingCanvas.h"
#include "SkiaCanvas.h"
+#include "hwui/Paint.h"
+#include "pipeline/skia/BackdropFilterDrawable.h"
#include "pipeline/skia/SkiaDisplayList.h"
#include "pipeline/skia/SkiaOpenGLPipeline.h"
#include "pipeline/skia/SkiaPipeline.h"
@@ -1211,3 +1213,77 @@
canvas.drawDrawable(&drawable);
EXPECT_EQ(2, canvas.mDrawCounter);
}
+
+// Verify drawing logics for BackdropFilterDrawable
+RENDERTHREAD_TEST(BackdropFilterDrawable, drawing) {
+ static const int CANVAS_WIDTH = 100;
+ static const int CANVAS_HEIGHT = 200;
+ class SimpleTestCanvas : public TestCanvasBase {
+ public:
+ SkRect mDstBounds;
+ SimpleTestCanvas() : TestCanvasBase(CANVAS_WIDTH, CANVAS_HEIGHT) {}
+ void onDrawRect(const SkRect& rect, const SkPaint& paint) override {
+ // did nothing.
+ }
+
+ // called when BackdropFilterDrawable is drawn.
+ void onDrawImageRect2(const SkImage*, const SkRect& src, const SkRect& dst,
+ const SkSamplingOptions&, const SkPaint*,
+ SrcRectConstraint) override {
+ mDrawCounter++;
+ mDstBounds = dst;
+ }
+ };
+ class SimpleLayer : public SkSurface_Base {
+ public:
+ SimpleLayer()
+ : SkSurface_Base(SkImageInfo::MakeN32Premul(CANVAS_WIDTH, CANVAS_HEIGHT), nullptr) {
+ }
+ virtual sk_sp<SkImage> onNewImageSnapshot(const SkIRect* bounds) override {
+ SkBitmap bitmap;
+ bitmap.allocN32Pixels(CANVAS_WIDTH, CANVAS_HEIGHT);
+ bitmap.setImmutable();
+ return bitmap.asImage();
+ }
+ SkCanvas* onNewCanvas() override { return new SimpleTestCanvas(); }
+ sk_sp<SkSurface> onNewSurface(const SkImageInfo&) override { return nullptr; }
+ bool onCopyOnWrite(ContentChangeMode) override { return true; }
+ void onWritePixels(const SkPixmap&, int x, int y) {}
+ };
+
+ auto node = TestUtils::createSkiaNode(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT,
+ [](RenderProperties& props, SkiaRecordingCanvas& canvas) {
+ canvas.drawRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT,
+ Paint());
+ });
+
+ sk_sp<SkSurface> surface(new SimpleLayer());
+ auto* canvas = reinterpret_cast<SimpleTestCanvas*>(surface->getCanvas());
+ RenderNodeDrawable drawable(node.get(), canvas, true);
+ BackdropFilterDrawable backdropDrawable(node.get(), canvas);
+ canvas->drawDrawable(&drawable);
+ canvas->drawDrawable(&backdropDrawable);
+ // no backdrop filter, skip drawing.
+ EXPECT_EQ(0, canvas->mDrawCounter);
+
+ sk_sp<SkImageFilter> filter(SkImageFilters::Blur(3, 3, nullptr));
+ node->animatorProperties().mutateLayerProperties().setBackdropImageFilter(filter.get());
+ canvas->drawDrawable(&drawable);
+ canvas->drawDrawable(&backdropDrawable);
+ // backdrop filter is set, ok to draw.
+ EXPECT_EQ(1, canvas->mDrawCounter);
+ EXPECT_EQ(SkRect::MakeLTRB(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT), canvas->mDstBounds);
+
+ canvas->translate(30, 30);
+ canvas->drawDrawable(&drawable);
+ canvas->drawDrawable(&backdropDrawable);
+ // the drawable is still visible, ok to draw.
+ EXPECT_EQ(2, canvas->mDrawCounter);
+ EXPECT_EQ(SkRect::MakeLTRB(0, 0, CANVAS_WIDTH - 30, CANVAS_HEIGHT - 30), canvas->mDstBounds);
+
+ canvas->translate(CANVAS_WIDTH, CANVAS_HEIGHT);
+ canvas->drawDrawable(&drawable);
+ canvas->drawDrawable(&backdropDrawable);
+ // the drawable is invisible, skip drawing.
+ EXPECT_EQ(2, canvas->mDrawCounter);
+}
diff --git a/tests/HwAccelerationTest/AndroidManifest.xml b/tests/HwAccelerationTest/AndroidManifest.xml
index 80c7a21..db3a992 100644
--- a/tests/HwAccelerationTest/AndroidManifest.xml
+++ b/tests/HwAccelerationTest/AndroidManifest.xml
@@ -789,6 +789,15 @@
</intent-filter>
</activity>
+ <activity android:name="BackdropBlurActivity"
+ android:label="RenderEffect/BackdropBlur"
+ android:exported="true">
+ <intent-filter>
+ <action android:name="android.intent.action.MAIN"/>
+ <category android:name="com.android.test.hwui.TEST"/>
+ </intent-filter>
+ </activity>
+
<activity android:name="BlurActivity"
android:label="RenderEffect/Blur"
android:exported="true">
diff --git a/tests/HwAccelerationTest/res/drawable/robot_repeated.xml b/tests/HwAccelerationTest/res/drawable/robot_repeated.xml
new file mode 100644
index 0000000..bbb15b7
--- /dev/null
+++ b/tests/HwAccelerationTest/res/drawable/robot_repeated.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2022 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
+ android:src="@drawable/robot"
+ android:tileMode="repeat" android:gravity="fill" />
\ No newline at end of file
diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/BackdropBlurActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/BackdropBlurActivity.java
new file mode 100644
index 0000000..8086b29
--- /dev/null
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/BackdropBlurActivity.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.test.hwui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.ColorMatrix;
+import android.graphics.ColorMatrixColorFilter;
+import android.graphics.Outline;
+import android.graphics.RenderEffect;
+import android.graphics.Shader;
+import android.os.Bundle;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewOutlineProvider;
+import android.view.animation.DecelerateInterpolator;
+import android.widget.FrameLayout;
+import android.widget.ScrollView;
+
+@SuppressWarnings({"UnusedDeclaration"})
+public class BackdropBlurActivity extends Activity {
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ final ScrollView scrollView = new ScrollView(this);
+ final FrameLayout innerFrame = new FrameLayout(this);
+ final View backgroundView = new View(this);
+ backgroundView.setBackgroundResource(R.drawable.robot_repeated);
+ innerFrame.addView(backgroundView, ViewGroup.LayoutParams.MATCH_PARENT, 10000);
+ scrollView.addView(innerFrame,
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+
+ final FrameLayout contentView = new FrameLayout(this);
+ contentView.addView(scrollView,
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
+ contentView.addView(new BackdropBlurView(this), 300, 300);
+ setContentView(contentView);
+ }
+
+ private static class BackdropBlurView extends View {
+ private final float mBlurRadius = 60f;
+ private final float mSaturation = 1.8f;
+
+ private float mDownOffsetX;
+ private float mDownOffsetY;
+
+ BackdropBlurView(Context c) {
+ super(c);
+
+ // init RenderEffect.
+ final RenderEffect blurEffect = RenderEffect.createBlurEffect(
+ mBlurRadius, mBlurRadius,
+ null, Shader.TileMode.MIRROR // TileMode.MIRROR is better for blur.
+ );
+
+ final ColorMatrix colorMatrix = new ColorMatrix();
+ colorMatrix.setSaturation(mSaturation);
+ final RenderEffect effect = RenderEffect.createColorFilterEffect(
+ new ColorMatrixColorFilter(colorMatrix), blurEffect
+ );
+ setBackdropRenderEffect(effect);
+
+ // clip to a round outline.
+ setOutlineProvider(new ViewOutlineProvider() {
+ @Override
+ public void getOutline(View v, Outline outline) {
+ outline.setOval(0, 0, v.getWidth(), v.getHeight());
+ }
+ });
+ setClipToOutline(true);
+
+ animate().setInterpolator(new DecelerateInterpolator(2.0f));
+ }
+
+ @Override
+ protected void onDraw(Canvas canvas) {
+ super.onDraw(canvas);
+
+ canvas.drawColor(0x99F0F0F0);
+ }
+
+ @Override
+ public boolean onTouchEvent(MotionEvent event) {
+ switch (event.getActionMasked()) {
+ case MotionEvent.ACTION_DOWN:
+ mDownOffsetX = event.getRawX() - getTranslationX();
+ mDownOffsetY = event.getRawY() - getTranslationY();
+ animate().scaleX(1.5f).scaleY(1.5f).start();
+ break;
+ case MotionEvent.ACTION_UP:
+ case MotionEvent.ACTION_CANCEL:
+ animate().scaleX(1f).scaleY(1f).start();
+ break;
+ case MotionEvent.ACTION_MOVE:
+ setTranslationX(event.getRawX() - mDownOffsetX);
+ setTranslationY(event.getRawY() - mDownOffsetY);
+ break;
+ }
+ return true;
+ }
+ }
+}