VectorDrawable native rendering - Step 4 of MANY

This CL runs VectorDrawable animation on RenderThread. The changes in this CL
include:
- Convert all the animators in AnimatorSet for AVD into a set of RenderNodeAnimators.
- Hook up the new animators with RenderThread
- Add drawOp in RecordingCanvas for drawing VD so that during the animation
  on RenderThread, all the property changes on VD can be reflected on the screen.

TODO:
- Implement reverse and reset for AVD.

Change-Id: I2df1d754f2db0ad098d9c15dde4bb2bdfafc2315

1 files changed, 99 insertions, 0 deletions

diff --git a/libs/hwui/PropertyValuesHolder.cpp b/libs/hwui/PropertyValuesHolder.cpp
new file mode 100644
index 000000000000..8f837f6048d6
--- /dev/null
+++ b/libs/hwui/PropertyValuesHolder.cpp
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 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 "PropertyValuesHolder.h"
+
+#include "utils/VectorDrawableUtils.h"
+
+#include <utils/Log.h>
+
+namespace android {
+namespace uirenderer {
+
+using namespace VectorDrawable;
+
+float PropertyValuesHolder::getValueFromData(float fraction) {
+    if (mDataSource.size() == 0) {
+        LOG_ALWAYS_FATAL("No data source is defined");
+        return 0;
+    }
+    if (fraction <= 0.0f) {
+        return mDataSource.front();
+    }
+    if (fraction >= 1.0f) {
+        return mDataSource.back();
+    }
+
+    fraction *= mDataSource.size() - 1;
+    int lowIndex = floor(fraction);
+    fraction -= lowIndex;
+
+    float value = mDataSource[lowIndex] * (1.0f - fraction)
+            + mDataSource[lowIndex + 1] * fraction;
+    return value;
+}
+
+void GroupPropertyValuesHolder::setFraction(float fraction) {
+    float animatedValue;
+    if (mDataSource.size() > 0) {
+        animatedValue = getValueFromData(fraction);
+    } else {
+        animatedValue = mStartValue * (1 - fraction) + mEndValue * fraction;
+    }
+    mGroup->setPropertyValue(mPropertyId, animatedValue);
+}
+
+inline U8CPU lerp(U8CPU fromValue, U8CPU toValue, float fraction) {
+    return (U8CPU) (fromValue * (1 - fraction) + toValue * fraction);
+}
+
+// TODO: Add a test for this
+SkColor FullPathColorPropertyValuesHolder::interpolateColors(SkColor fromColor, SkColor toColor,
+        float fraction) {
+    U8CPU alpha = lerp(SkColorGetA(fromColor), SkColorGetA(toColor), fraction);
+    U8CPU red = lerp(SkColorGetR(fromColor), SkColorGetR(toColor), fraction);
+    U8CPU green = lerp(SkColorGetG(fromColor), SkColorGetG(toColor), fraction);
+    U8CPU blue = lerp(SkColorGetB(fromColor), SkColorGetB(toColor), fraction);
+    return SkColorSetARGB(alpha, red, green, blue);
+}
+
+void FullPathColorPropertyValuesHolder::setFraction(float fraction) {
+    SkColor animatedValue = interpolateColors(mStartValue, mEndValue, fraction);
+    mFullPath->setColorPropertyValue(mPropertyId, animatedValue);
+}
+
+void FullPathPropertyValuesHolder::setFraction(float fraction) {
+    float animatedValue;
+    if (mDataSource.size() > 0) {
+        animatedValue = getValueFromData(fraction);
+    } else {
+        animatedValue = mStartValue * (1 - fraction) + mEndValue * fraction;
+    }
+    mFullPath->setPropertyValue(mPropertyId, animatedValue);
+}
+
+void PathDataPropertyValuesHolder::setFraction(float fraction) {
+    VectorDrawableUtils::interpolatePaths(&mPathData, mStartValue, mEndValue, fraction);
+    mPath->setPathData(mPathData);
+}
+
+void RootAlphaPropertyValuesHolder::setFraction(float fraction) {
+    float animatedValue = mStartValue * (1 - fraction) + mEndValue * fraction;
+    mTree->setRootAlpha(animatedValue);
+}
+
+} // namepace uirenderer
+} // namespace android