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Merge "Add path support into xml files for PathInterpolator and ObjectAnimator."

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This commit is contained in:
ztenghui
2014-06-19 18:32:12 +00:00
committed by Android (Google) Code Review
parent adb11e0732 cf4832f69c
commit 65eb8e844e
11 changed files with 707 additions and 572 deletions
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2
api/current.txt
View File

@@ -937,6 +937,8 @@ package android {
field public static final int progressTintMode = 16843878; // 0x1010466
field public static final int prompt = 16843131; // 0x101017b
field public static final int propertyName = 16843489; // 0x10102e1
field public static final int propertyXName = 16843894; // 0x1010476
field public static final int propertyYName = 16843895; // 0x1010477
field public static final int protectionLevel = 16842761; // 0x1010009
field public static final int publicKey = 16843686; // 0x10103a6
field public static final int queryActionMsg = 16843227; // 0x10101db

164
core/java/android/animation/AnimatorInflater.java
View File

@@ -17,11 +17,13 @@ package android.animation;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.Resources.NotFoundException;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.content.res.Resources.NotFoundException;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.PathParser;
import android.util.StateSet;
import android.util.TypedValue;
import android.util.Xml;
@@ -158,7 +160,7 @@ public class AnimatorInflater {
int stateIndex = 0;
for (int i = 0; i < attributeCount; i++) {
int attrName = attributeSet.getAttributeNameResource(i);
if (attrName == com.android.internal.R.attr.animation) {
if (attrName == R.attr.animation) {
animator = loadAnimator(context,
attributeSet.getAttributeResourceValue(i, 0));
} else {
@@ -186,36 +188,43 @@ public class AnimatorInflater {
}
}
/**
* @param anim Null if this is a ValueAnimator, otherwise this is an
* ObjectAnimator
* @param arrayAnimator Incoming typed array for Animator's attributes.
* @param arrayObjectAnimator Incoming typed array for Object Animator's
* attributes.
*/
private static void parseAnimatorFromTypeArray(ValueAnimator anim,
TypedArray arrayAnimator, TypedArray arrayObjectAnimator) {
long duration = arrayAnimator.getInt(R.styleable.Animator_duration, 300);
private static void parseAnimatorFromTypeArray(ValueAnimator anim, TypedArray a) {
long duration = a.getInt(com.android.internal.R.styleable.Animator_duration, 300);
long startDelay = arrayAnimator.getInt(R.styleable.Animator_startOffset, 0);
long startDelay = a.getInt(com.android.internal.R.styleable.Animator_startOffset, 0);
int valueType = a.getInt(com.android.internal.R.styleable.Animator_valueType,
int valueType = arrayAnimator.getInt(R.styleable.Animator_valueType,
VALUE_TYPE_FLOAT);
if (anim == null) {
anim = new ValueAnimator();
}
TypeEvaluator evaluator = null;
int valueFromIndex = com.android.internal.R.styleable.Animator_valueFrom;
int valueToIndex = com.android.internal.R.styleable.Animator_valueTo;
TypeEvaluator evaluator = null;
int valueFromIndex = R.styleable.Animator_valueFrom;
int valueToIndex = R.styleable.Animator_valueTo;
boolean getFloats = (valueType == VALUE_TYPE_FLOAT);
TypedValue tvFrom = a.peekValue(valueFromIndex);
TypedValue tvFrom = arrayAnimator.peekValue(valueFromIndex);
boolean hasFrom = (tvFrom != null);
int fromType = hasFrom ? tvFrom.type : 0;
TypedValue tvTo = a.peekValue(valueToIndex);
TypedValue tvTo = arrayAnimator.peekValue(valueToIndex);
boolean hasTo = (tvTo != null);
int toType = hasTo ? tvTo.type : 0;
if ((hasFrom && (fromType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(fromType <= TypedValue.TYPE_LAST_COLOR_INT)) ||
(hasTo && (toType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(toType <= TypedValue.TYPE_LAST_COLOR_INT))) {
(hasTo && (toType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(toType <= TypedValue.TYPE_LAST_COLOR_INT))) {
// special case for colors: ignore valueType and get ints
getFloats = false;
evaluator = ArgbEvaluator.getInstance();
@@ -226,15 +235,15 @@ public class AnimatorInflater {
float valueTo;
if (hasFrom) {
if (fromType == TypedValue.TYPE_DIMENSION) {
valueFrom = a.getDimension(valueFromIndex, 0f);
valueFrom = arrayAnimator.getDimension(valueFromIndex, 0f);
} else {
valueFrom = a.getFloat(valueFromIndex, 0f);
valueFrom = arrayAnimator.getFloat(valueFromIndex, 0f);
}
if (hasTo) {
if (toType == TypedValue.TYPE_DIMENSION) {
valueTo = a.getDimension(valueToIndex, 0f);
valueTo = arrayAnimator.getDimension(valueToIndex, 0f);
} else {
valueTo = a.getFloat(valueToIndex, 0f);
valueTo = arrayAnimator.getFloat(valueToIndex, 0f);
}
anim.setFloatValues(valueFrom, valueTo);
} else {
@@ -242,9 +251,9 @@ public class AnimatorInflater {
}
} else {
if (toType == TypedValue.TYPE_DIMENSION) {
valueTo = a.getDimension(valueToIndex, 0f);
valueTo = arrayAnimator.getDimension(valueToIndex, 0f);
} else {
valueTo = a.getFloat(valueToIndex, 0f);
valueTo = arrayAnimator.getFloat(valueToIndex, 0f);
}
anim.setFloatValues(valueTo);
}
@@ -253,21 +262,21 @@ public class AnimatorInflater {
int valueTo;
if (hasFrom) {
if (fromType == TypedValue.TYPE_DIMENSION) {
valueFrom = (int) a.getDimension(valueFromIndex, 0f);
valueFrom = (int) arrayAnimator.getDimension(valueFromIndex, 0f);
} else if ((fromType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(fromType <= TypedValue.TYPE_LAST_COLOR_INT)) {
valueFrom = a.getColor(valueFromIndex, 0);
valueFrom = arrayAnimator.getColor(valueFromIndex, 0);
} else {
valueFrom = a.getInt(valueFromIndex, 0);
valueFrom = arrayAnimator.getInt(valueFromIndex, 0);
}
if (hasTo) {
if (toType == TypedValue.TYPE_DIMENSION) {
valueTo = (int) a.getDimension(valueToIndex, 0f);
valueTo = (int) arrayAnimator.getDimension(valueToIndex, 0f);
} else if ((toType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(toType <= TypedValue.TYPE_LAST_COLOR_INT)) {
valueTo = a.getColor(valueToIndex, 0);
valueTo = arrayAnimator.getColor(valueToIndex, 0);
} else {
valueTo = a.getInt(valueToIndex, 0);
valueTo = arrayAnimator.getInt(valueToIndex, 0);
}
anim.setIntValues(valueFrom, valueTo);
} else {
@@ -276,12 +285,12 @@ public class AnimatorInflater {
} else {
if (hasTo) {
if (toType == TypedValue.TYPE_DIMENSION) {
valueTo = (int) a.getDimension(valueToIndex, 0f);
valueTo = (int) arrayAnimator.getDimension(valueToIndex, 0f);
} else if ((toType >= TypedValue.TYPE_FIRST_COLOR_INT) &&
(toType <= TypedValue.TYPE_LAST_COLOR_INT)) {
valueTo = a.getColor(valueToIndex, 0);
(toType <= TypedValue.TYPE_LAST_COLOR_INT)) {
valueTo = arrayAnimator.getColor(valueToIndex, 0);
} else {
valueTo = a.getInt(valueToIndex, 0);
valueTo = arrayAnimator.getInt(valueToIndex, 0);
}
anim.setIntValues(valueTo);
}
@@ -291,18 +300,59 @@ public class AnimatorInflater {
anim.setDuration(duration);
anim.setStartDelay(startDelay);
if (a.hasValue(com.android.internal.R.styleable.Animator_repeatCount)) {
if (arrayAnimator.hasValue(R.styleable.Animator_repeatCount)) {
anim.setRepeatCount(
a.getInt(com.android.internal.R.styleable.Animator_repeatCount, 0));
arrayAnimator.getInt(R.styleable.Animator_repeatCount, 0));
}
if (a.hasValue(com.android.internal.R.styleable.Animator_repeatMode)) {
if (arrayAnimator.hasValue(R.styleable.Animator_repeatMode)) {
anim.setRepeatMode(
a.getInt(com.android.internal.R.styleable.Animator_repeatMode,
arrayAnimator.getInt(R.styleable.Animator_repeatMode,
ValueAnimator.RESTART));
}
if (evaluator != null) {
anim.setEvaluator(evaluator);
}
if (arrayObjectAnimator != null) {
ObjectAnimator oa = (ObjectAnimator) anim;
String pathData = arrayObjectAnimator.getString(R.styleable.PropertyAnimator_pathData);
// Note that if there is a pathData defined in the Object Animator,
// valueFrom / valueTo will be overwritten by the pathData.
if (pathData != null) {
String propertyXName =
arrayObjectAnimator.getString(R.styleable.PropertyAnimator_propertyXName);
String propertyYName =
arrayObjectAnimator.getString(R.styleable.PropertyAnimator_propertyYName);
if (propertyXName == null && propertyYName == null) {
throw new IllegalArgumentException("propertyXName or propertyYName"
+ " is needed for PathData in Object Animator");
} else {
Path path = PathParser.createPathFromPathData(pathData);
Keyframe[][] keyframes = PropertyValuesHolder.createKeyframes(path, !getFloats);
PropertyValuesHolder x = null;
PropertyValuesHolder y = null;
if (propertyXName != null) {
x = PropertyValuesHolder.ofKeyframe(propertyXName, keyframes[0]);
}
if (propertyYName != null) {
y = PropertyValuesHolder.ofKeyframe(propertyYName, keyframes[1]);
}
if (x == null) {
oa.setValues(y);
} else if (y == null) {
oa.setValues(x);
} else {
oa.setValues(x, y);
}
}
} else {
String propertyName =
arrayObjectAnimator.getString(R.styleable.PropertyAnimator_propertyName);
oa.setPropertyName(propertyName);
}
}
}
private static Animator createAnimatorFromXml(Resources res, Theme theme, XmlPullParser parser)
@@ -338,11 +388,11 @@ public class AnimatorInflater {
anim = new AnimatorSet();
TypedArray a;
if (theme != null) {
a = theme.obtainStyledAttributes(attrs, com.android.internal.R.styleable.AnimatorSet, 0, 0);
a = theme.obtainStyledAttributes(attrs, R.styleable.AnimatorSet, 0, 0);
} else {
a = res.obtainAttributes(attrs, com.android.internal.R.styleable.AnimatorSet);
a = res.obtainAttributes(attrs, R.styleable.AnimatorSet);
}
int ordering = a.getInt(com.android.internal.R.styleable.AnimatorSet_ordering,
int ordering = a.getInt(R.styleable.AnimatorSet_ordering,
TOGETHER);
createAnimatorFromXml(res, theme, parser, attrs, (AnimatorSet) anim, ordering);
a.recycle();
@@ -380,19 +430,6 @@ public class AnimatorInflater {
loadAnimator(res, theme, attrs, anim);
TypedArray a;
if (theme != null) {
a = theme.obtainStyledAttributes(attrs, R.styleable.PropertyAnimator, 0, 0);
} else {
a = res.obtainAttributes(attrs, R.styleable.PropertyAnimator);
}
String propertyName = a.getString(R.styleable.PropertyAnimator_propertyName);
anim.setPropertyName(propertyName);
a.recycle();
return anim;
}
@@ -402,26 +439,41 @@ public class AnimatorInflater {
*
* @param res The resources
* @param attrs The set of attributes holding the animation parameters
* @param anim Null if this is a ValueAnimator, otherwise this is an
* ObjectAnimator
*/
private static ValueAnimator loadAnimator(Resources res, Theme theme,
AttributeSet attrs, ValueAnimator anim)
throws NotFoundException {
TypedArray a;
TypedArray arrayAnimator = null;
TypedArray arrayObjectAnimator = null;
if (theme != null) {
a = theme.obtainStyledAttributes(attrs, R.styleable.Animator, 0, 0);
arrayAnimator = theme.obtainStyledAttributes(attrs, R.styleable.Animator, 0, 0);
} else {
a = res.obtainAttributes(attrs, R.styleable.Animator);
arrayAnimator = res.obtainAttributes(attrs, R.styleable.Animator);
}
parseAnimatorFromTypeArray(anim, a);
// If anim is not null, then it is an object animator.
if (anim != null) {
if (theme != null) {
arrayObjectAnimator = theme.obtainStyledAttributes(attrs,
R.styleable.PropertyAnimator, 0, 0);
} else {
arrayObjectAnimator = res.obtainAttributes(attrs, R.styleable.PropertyAnimator);
}
}
parseAnimatorFromTypeArray(anim, arrayAnimator, arrayObjectAnimator);
final int resID =
a.getResourceId(com.android.internal.R.styleable.Animator_interpolator, 0);
arrayAnimator.getResourceId(R.styleable.Animator_interpolator, 0);
if (resID > 0) {
anim.setInterpolator(AnimationUtils.loadInterpolator(res, theme, resID));
}
a.recycle();
arrayAnimator.recycle();
arrayObjectAnimator.recycle();
return anim;
}

528
core/java/android/util/PathParser.java Normal file
View File

@@ -0,0 +1,528 @@
/*
* Copyright (C) 2014 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 android.util;
import android.graphics.Path;
import android.util.Log;
import java.util.ArrayList;
import java.util.Arrays;
/**
* @hide
*/
public class PathParser {
static final String LOGTAG = PathParser.class.getSimpleName();
/**
* @param pathData The string representing a path, the same as "d" string in svg file.
* @return the generated Path object.
*/
public static Path createPathFromPathData(String pathData) {
Path path = new Path();
PathDataNode[] nodes = createNodesFromPathData(pathData);
if (nodes != null) {
PathDataNode.nodesToPath(nodes, path);
return path;
}
return null;
}
/**
* @param pathData The string representing a path, the same as "d" string in svg file.
* @return an array of the PathDataNode.
*/
public static PathDataNode[] createNodesFromPathData(String pathData) {
int start = 0;
int end = 1;
ArrayList<PathDataNode> list = new ArrayList<PathDataNode>();
while (end < pathData.length()) {
end = nextStart(pathData, end);
String s = pathData.substring(start, end);
float[] val = getFloats(s);
addNode(list, s.charAt(0), val);
start = end;
end++;
}
if ((end - start) == 1 && start < pathData.length()) {
addNode(list, pathData.charAt(start), new float[0]);
}
return list.toArray(new PathDataNode[list.size()]);
}
private static int nextStart(String s, int end) {
char c;
while (end < s.length()) {
c = s.charAt(end);
if (((c - 'A') * (c - 'Z') <= 0) || (((c - 'a') * (c - 'z') <= 0))) {
return end;
}
end++;
}
return end;
}
private static void addNode(ArrayList<PathDataNode> list, char cmd, float[] val) {
list.add(new PathDataNode(cmd, val));
}
/**
* Parse the floats in the string.
* This is an optimized version of parseFloat(s.split(",|\\s"));
*
* @param s the string containing a command and list of floats
* @return array of floats
*/
private static float[] getFloats(String s) {
if (s.charAt(0) == 'z' | s.charAt(0) == 'Z') {
return new float[0];
}
try {
float[] tmp = new float[s.length()];
int count = 0;
int pos = 1, end;
while ((end = extract(s, pos)) >= 0) {
if (pos < end) {
tmp[count++] = Float.parseFloat(s.substring(pos, end));
}
pos = end + 1;
}
// handle the final float if there is one
if (pos < s.length()) {
tmp[count++] = Float.parseFloat(s.substring(pos, s.length()));
}
return Arrays.copyOf(tmp, count);
} catch (NumberFormatException e){
Log.e(LOGTAG,"error in parsing \""+s+"\"");
throw e;
}
}
/**
* Calculate the position of the next comma or space
* @param s the string to search
* @param start the position to start searching
* @return the position of the next comma or space or -1 if none found
*/
private static int extract(String s, int start) {
int space = s.indexOf(' ', start);
int comma = s.indexOf(',', start);
if (space == -1) {
return comma;
}
if (comma == -1) {
return space;
}
return (comma > space) ? space : comma;
}
public static class PathDataNode {
private char mType;
private float[] mParams;
private PathDataNode(char type, float[] params) {
mType = type;
mParams = params;
}
private PathDataNode(PathDataNode n) {
mType = n.mType;
mParams = Arrays.copyOf(n.mParams, n.mParams.length);
}
public static void nodesToPath(PathDataNode[] node, Path path) {
float[] current = new float[4];
char previousCommand = 'm';
for (int i = 0; i < node.length; i++) {
addCommand(path, current, previousCommand, node[i].mType, node[i].mParams);
previousCommand = node[i].mType;
}
}
private static void addCommand(Path path, float[] current,
char previousCmd, char cmd, float[] val) {
int incr = 2;
float currentX = current[0];
float currentY = current[1];
float ctrlPointX = current[2];
float ctrlPointY = current[3];
float reflectiveCtrlPointX;
float reflectiveCtrlPointY;
switch (cmd) {
case 'z':
case 'Z':
path.close();
return;
case 'm':
case 'M':
case 'l':
case 'L':
case 't':
case 'T':
incr = 2;
break;
case 'h':
case 'H':
case 'v':
case 'V':
incr = 1;
break;
case 'c':
case 'C':
incr = 6;
break;
case 's':
case 'S':
case 'q':
case 'Q':
incr = 4;
break;
case 'a':
case 'A':
incr = 7;
break;
}
for (int k = 0; k < val.length; k += incr) {
switch (cmd) {
case 'm': // moveto - Start a new sub-path (relative)
path.rMoveTo(val[k + 0], val[k + 1]);
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'M': // moveto - Start a new sub-path
path.moveTo(val[k + 0], val[k + 1]);
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'l': // lineto - Draw a line from the current point (relative)
path.rLineTo(val[k + 0], val[k + 1]);
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'L': // lineto - Draw a line from the current point
path.lineTo(val[k + 0], val[k + 1]);
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'z': // closepath - Close the current subpath
case 'Z': // closepath - Close the current subpath
path.close();
break;
case 'h': // horizontal lineto - Draws a horizontal line (relative)
path.rLineTo(val[k + 0], 0);
currentX += val[k + 0];
break;
case 'H': // horizontal lineto - Draws a horizontal line
path.lineTo(val[k + 0], currentY);
currentX = val[k + 0];
break;
case 'v': // vertical lineto - Draws a vertical line from the current point (r)
path.rLineTo(0, val[k + 0]);
currentY += val[k + 0];
break;
case 'V': // vertical lineto - Draws a vertical line from the current point
path.lineTo(currentX, val[k + 0]);
currentY = val[k + 0];
break;
case 'c': // curveto - Draws a cubic Bézier curve (relative)
path.rCubicTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3],
val[k + 4], val[k + 5]);
ctrlPointX = currentX + val[k + 2];
ctrlPointY = currentY + val[k + 3];
currentX += val[k + 4];
currentY += val[k + 5];
break;
case 'C': // curveto - Draws a cubic Bézier curve
path.cubicTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3],
val[k + 4], val[k + 5]);
currentX = val[k + 4];
currentY = val[k + 5];
ctrlPointX = val[k + 2];
ctrlPointY = val[k + 3];
break;
case 's': // smooth curveto - Draws a cubic Bézier curve (reflective cp)
reflectiveCtrlPointX = 0;
reflectiveCtrlPointY = 0;
if (previousCmd == 'c' || previousCmd == 's'
|| previousCmd == 'C' || previousCmd == 'S') {
reflectiveCtrlPointX = currentX - ctrlPointX;
reflectiveCtrlPointY = currentY - ctrlPointY;
}
path.rCubicTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1],
val[k + 2], val[k + 3]);
ctrlPointX = currentX + val[k + 0];
ctrlPointY = currentY + val[k + 1];
currentX += val[k + 2];
currentY += val[k + 3];
break;
case 'S': // shorthand/smooth curveto Draws a cubic Bézier curve(reflective cp)
reflectiveCtrlPointX = currentX;
reflectiveCtrlPointY = currentY;
if (previousCmd == 'c' || previousCmd == 's'
|| previousCmd == 'C' || previousCmd == 'S') {
reflectiveCtrlPointX = 2 * currentX - ctrlPointX;
reflectiveCtrlPointY = 2 * currentY - ctrlPointY;
}
path.cubicTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = val[k + 0];
ctrlPointY = val[k + 1];
currentX = val[k + 2];
currentY = val[k + 3];
break;
case 'q': // Draws a quadratic Bézier (relative)
path.rQuadTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = currentX + val[k + 0];
ctrlPointY = currentY + val[k + 1];
currentX += val[k + 2];
currentY += val[k + 3];
break;
case 'Q': // Draws a quadratic Bézier
path.quadTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = val[k + 0];
ctrlPointY = val[k + 1];
currentX = val[k + 2];
currentY = val[k + 3];
break;
case 't': // Draws a quadratic Bézier curve(reflective control point)(relative)
reflectiveCtrlPointX = 0;
reflectiveCtrlPointY = 0;
if (previousCmd == 'q' || previousCmd == 't'
|| previousCmd == 'Q' || previousCmd == 'T') {
reflectiveCtrlPointX = currentX - ctrlPointX;
reflectiveCtrlPointY = currentY - ctrlPointY;
}
path.rQuadTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1]);
ctrlPointX = currentX + reflectiveCtrlPointX;
ctrlPointY = currentY + reflectiveCtrlPointY;
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'T': // Draws a quadratic Bézier curve (reflective control point)
reflectiveCtrlPointX = currentX;
reflectiveCtrlPointY = currentY;
if (previousCmd == 'q' || previousCmd == 't'
|| previousCmd == 'Q' || previousCmd == 'T') {
reflectiveCtrlPointX = 2 * currentX - ctrlPointX;
reflectiveCtrlPointY = 2 * currentY - ctrlPointY;
}
path.quadTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1]);
ctrlPointX = reflectiveCtrlPointX;
ctrlPointY = reflectiveCtrlPointY;
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'a': // Draws an elliptical arc
// (rx ry x-axis-rotation large-arc-flag sweep-flag x y)
drawArc(path,
currentX,
currentY,
val[k + 5] + currentX,
val[k + 6] + currentY,
val[k + 0],
val[k + 1],
val[k + 2],
val[k + 3] != 0,
val[k + 4] != 0);
currentX += val[k + 5];
currentY += val[k + 6];
ctrlPointX = currentX;
ctrlPointY = currentY;
break;
case 'A': // Draws an elliptical arc
drawArc(path,
currentX,
currentY,
val[k + 5],
val[k + 6],
val[k + 0],
val[k + 1],
val[k + 2],
val[k + 3] != 0,
val[k + 4] != 0);
currentX = val[k + 5];
currentY = val[k + 6];
ctrlPointX = currentX;
ctrlPointY = currentY;
break;
}
previousCmd = cmd;
}
current[0] = currentX;
current[1] = currentY;
current[2] = ctrlPointX;
current[3] = ctrlPointY;
}
private static void drawArc(Path p,
float x0,
float y0,
float x1,
float y1,
float a,
float b,
float theta,
boolean isMoreThanHalf,
boolean isPositiveArc) {
/* Convert rotation angle from degrees to radians */
double thetaD = Math.toRadians(theta);
/* Pre-compute rotation matrix entries */
double cosTheta = Math.cos(thetaD);
double sinTheta = Math.sin(thetaD);
/* Transform (x0, y0) and (x1, y1) into unit space */
/* using (inverse) rotation, followed by (inverse) scale */
double x0p = (x0 * cosTheta + y0 * sinTheta) / a;
double y0p = (-x0 * sinTheta + y0 * cosTheta) / b;
double x1p = (x1 * cosTheta + y1 * sinTheta) / a;
double y1p = (-x1 * sinTheta + y1 * cosTheta) / b;
/* Compute differences and averages */
double dx = x0p - x1p;
double dy = y0p - y1p;
double xm = (x0p + x1p) / 2;
double ym = (y0p + y1p) / 2;
/* Solve for intersecting unit circles */
double dsq = dx * dx + dy * dy;
if (dsq == 0.0) {
Log.w(LOGTAG, " Points are coincident");
return; /* Points are coincident */
}
double disc = 1.0 / dsq - 1.0 / 4.0;
if (disc < 0.0) {
Log.w(LOGTAG, "Points are too far apart " + dsq);
float adjust = (float) (Math.sqrt(dsq) / 1.99999);
drawArc(p, x0, y0, x1, y1, a * adjust,
b * adjust, theta, isMoreThanHalf, isPositiveArc);
return; /* Points are too far apart */
}
double s = Math.sqrt(disc);
double sdx = s * dx;
double sdy = s * dy;
double cx;
double cy;
if (isMoreThanHalf == isPositiveArc) {
cx = xm - sdy;
cy = ym + sdx;
} else {
cx = xm + sdy;
cy = ym - sdx;
}
double eta0 = Math.atan2((y0p - cy), (x0p - cx));
double eta1 = Math.atan2((y1p - cy), (x1p - cx));
double sweep = (eta1 - eta0);
if (isPositiveArc != (sweep >= 0)) {
if (sweep > 0) {
sweep -= 2 * Math.PI;
} else {
sweep += 2 * Math.PI;
}
}
cx *= a;
cy *= b;
double tcx = cx;
cx = cx * cosTheta - cy * sinTheta;
cy = tcx * sinTheta + cy * cosTheta;
arcToBezier(p, cx, cy, a, b, x0, y0, thetaD, eta0, sweep);
}
/**
* Converts an arc to cubic Bezier segments and records them in p.
*
* @param p The target for the cubic Bezier segments
* @param cx The x coordinate center of the ellipse
* @param cy The y coordinate center of the ellipse
* @param a The radius of the ellipse in the horizontal direction
* @param b The radius of the ellipse in the vertical direction
* @param e1x E(eta1) x coordinate of the starting point of the arc
* @param e1y E(eta2) y coordinate of the starting point of the arc
* @param theta The angle that the ellipse bounding rectangle makes with horizontal plane
* @param start The start angle of the arc on the ellipse
* @param sweep The angle (positive or negative) of the sweep of the arc on the ellipse
*/
private static void arcToBezier(Path p,
double cx,
double cy,
double a,
double b,
double e1x,
double e1y,
double theta,
double start,
double sweep) {
// Taken from equations at: http://spaceroots.org/documents/ellipse/node8.html
// and http://www.spaceroots.org/documents/ellipse/node22.html
// Maximum of 45 degrees per cubic Bezier segment
int numSegments = Math.abs((int) Math.ceil(sweep * 4 / Math.PI));
double eta1 = start;
double cosTheta = Math.cos(theta);
double sinTheta = Math.sin(theta);
double cosEta1 = Math.cos(eta1);
double sinEta1 = Math.sin(eta1);
double ep1x = (-a * cosTheta * sinEta1) - (b * sinTheta * cosEta1);
double ep1y = (-a * sinTheta * sinEta1) + (b * cosTheta * cosEta1);
double anglePerSegment = sweep / numSegments;
for (int i = 0; i < numSegments; i++) {
double eta2 = eta1 + anglePerSegment;
double sinEta2 = Math.sin(eta2);
double cosEta2 = Math.cos(eta2);
double e2x = cx + (a * cosTheta * cosEta2) - (b * sinTheta * sinEta2);
double e2y = cy + (a * sinTheta * cosEta2) + (b * cosTheta * sinEta2);
double ep2x = -a * cosTheta * sinEta2 - b * sinTheta * cosEta2;
double ep2y = -a * sinTheta * sinEta2 + b * cosTheta * cosEta2;
double tanDiff2 = Math.tan((eta2 - eta1) / 2);
double alpha =
Math.sin(eta2 - eta1) * (Math.sqrt(4 + (3 * tanDiff2 * tanDiff2)) - 1) / 3;
double q1x = e1x + alpha * ep1x;
double q1y = e1y + alpha * ep1y;
double q2x = e2x - alpha * ep2x;
double q2y = e2y - alpha * ep2y;
p.cubicTo((float) q1x,
(float) q1y,
(float) q2x,
(float) q2y,
(float) e2x,
(float) e2y);
eta1 = eta2;
e1x = e2x;
e1y = e2y;
ep1x = ep2x;
ep1y = ep2y;
}
}
}
}

56
core/java/android/view/animation/PathInterpolator.java
View File

@@ -21,6 +21,7 @@ import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.PathParser;
import android.view.InflateException;
import com.android.internal.R;
@@ -102,28 +103,40 @@ public class PathInterpolator implements Interpolator {
}
private void parseInterpolatorFromTypeArray(TypedArray a) {
if (!a.hasValue(R.styleable.PathInterpolator_controlX1)) {
throw new InflateException("pathInterpolator requires the controlX1 attribute");
} else if (!a.hasValue(R.styleable.PathInterpolator_controlY1)) {
throw new InflateException("pathInterpolator requires the controlY1 attribute");
}
float x1 = a.getFloat(R.styleable.PathInterpolator_controlX1, 0);
float y1 = a.getFloat(R.styleable.PathInterpolator_controlY1, 0);
boolean hasX2 = a.hasValue(R.styleable.PathInterpolator_controlX2);
boolean hasY2 = a.hasValue(R.styleable.PathInterpolator_controlY2);
if (hasX2 != hasY2) {
throw new InflateException(
"pathInterpolator requires both controlX2 and controlY2 for cubic Beziers.");
}
if (!hasX2) {
initQuad(x1, y1);
// If there is pathData defined in the xml file, then the controls points
// will be all coming from pathData.
if (a.hasValue(R.styleable.PathInterpolator_pathData)) {
String pathData = a.getString(R.styleable.PathInterpolator_pathData);
Path path = PathParser.createPathFromPathData(pathData);
if (path == null) {
throw new InflateException("The path is null, which is created"
+ " from " + pathData);
}
initPath(path);
} else {
float x2 = a.getFloat(R.styleable.PathInterpolator_controlX2, 0);
float y2 = a.getFloat(R.styleable.PathInterpolator_controlY2, 0);
initCubic(x1, y1, x2, y2);
if (!a.hasValue(R.styleable.PathInterpolator_controlX1)) {
throw new InflateException("pathInterpolator requires the controlX1 attribute");
} else if (!a.hasValue(R.styleable.PathInterpolator_controlY1)) {
throw new InflateException("pathInterpolator requires the controlY1 attribute");
}
float x1 = a.getFloat(R.styleable.PathInterpolator_controlX1, 0);
float y1 = a.getFloat(R.styleable.PathInterpolator_controlY1, 0);
boolean hasX2 = a.hasValue(R.styleable.PathInterpolator_controlX2);
boolean hasY2 = a.hasValue(R.styleable.PathInterpolator_controlY2);
if (hasX2 != hasY2) {
throw new InflateException(
"pathInterpolator requires both controlX2 and controlY2 for cubic Beziers.");
}
if (!hasX2) {
initQuad(x1, y1);
} else {
float x2 = a.getFloat(R.styleable.PathInterpolator_controlX2, 0);
float y2 = a.getFloat(R.styleable.PathInterpolator_controlY2, 0);
initCubic(x1, y1, x2, y2);
}
}
}
@@ -216,5 +229,4 @@ public class PathInterpolator implements Interpolator {
float endY = mY[endIndex];
return startY + (fraction * (endY - startY));
}
}

14
core/res/res/values/attrs.xml
View File

@@ -5250,10 +5250,18 @@
</declare-styleable>
<declare-styleable name="PathInterpolator">
<!-- The x coordinate of the first control point of the cubic Bezier -->
<attr name="controlX1" format="float" />
<!-- The y coordinate of the first control point of the cubic Bezier -->
<attr name="controlY1" format="float" />
<!-- The x coordinate of the second control point of the cubic Bezier -->
<attr name="controlX2" format="float" />
<!-- The y coordinate of the second control point of the cubic Bezier -->
<attr name="controlY2" format="float" />
<!-- The control points defined as a path.
When pathData is defined, then both of the control points of the
cubic Bezier will be ignored. -->
<attr name="pathData"/>
</declare-styleable>
<!-- ========================== -->
@@ -5403,6 +5411,12 @@
<declare-styleable name="PropertyAnimator">
<!-- Name of the property being animated. -->
<attr name="propertyName" format="string"/>
<!-- Name of the property being animated as the X coordinate of the pathData. -->
<attr name="propertyXName" format="string"/>
<!-- Name of the property being animated as the Y coordinate of the pathData. -->
<attr name="propertyYName" format="string"/>
<!-- The path used to animate the properties in the ObjectAnimator -->
<attr name="pathData"/>
</declare-styleable>

2
core/res/res/values/public.xml
View File

@@ -2207,6 +2207,8 @@
<public type="attr" name="thumbTint" />
<public type="attr" name="thumbTintMode" />
<public type="attr" name="fullBackupOnly" />
<public type="attr" name="propertyXName" />
<public type="attr" name="propertyYName" />
<public-padding type="dimen" name="l_resource_pad" end="0x01050010" />

496
graphics/java/android/graphics/drawable/VectorDrawable.java
View File

@@ -33,6 +33,7 @@ import android.graphics.PorterDuff.Mode;
import android.util.ArrayMap;
import android.util.AttributeSet;
import android.util.Log;
import android.util.PathParser;
import android.util.Xml;
import com.android.internal.R;
@@ -956,7 +957,7 @@ public class VectorDrawable extends Drawable {
}
static class VPath {
private static class VPath {
private int[] mThemeAttrs;
int mStrokeColor = 0;
@@ -974,7 +975,7 @@ public class VectorDrawable extends Drawable {
Paint.Join mStrokeLineJoin = Paint.Join.MITER;
float mStrokeMiterlimit = 4;
private VNode[] mNode = null;
private PathParser.PathDataNode[] mNode = null;
private String mPathName;
public VPath() {
@@ -984,7 +985,7 @@ public class VectorDrawable extends Drawable {
public void toPath(Path path) {
path.reset();
if (mNode != null) {
VNode.createPath(mNode, path);
PathParser.PathDataNode.nodesToPath(mNode, path);
}
}
@@ -1099,7 +1100,8 @@ public class VectorDrawable extends Drawable {
}
if (themeAttrs == null || themeAttrs[R.styleable.VectorDrawablePath_pathData] == 0) {
mNode = parsePath(a.getString(R.styleable.VectorDrawablePath_pathData));
mNode = PathParser.createNodesFromPathData(a.getString(
R.styleable.VectorDrawablePath_pathData));
}
if (themeAttrs == null || themeAttrs[R.styleable.VectorDrawablePath_fill] == 0) {
@@ -1182,7 +1184,8 @@ public class VectorDrawable extends Drawable {
}
if (a.hasValue(R.styleable.VectorDrawablePath_pathData)) {
mNode = parsePath(a.getString(R.styleable.VectorDrawablePath_pathData));
mNode = PathParser.createNodesFromPathData(a.getString(
R.styleable.VectorDrawablePath_pathData));
}
mFillColor = a.getColor(R.styleable.VectorDrawablePath_fill, mFillColor);
@@ -1218,488 +1221,5 @@ public class VectorDrawable extends Drawable {
mStrokeColor = applyAlpha(mStrokeColor, mStrokeOpacity);
}
}
private static int nextStart(String s, int end) {
char c;
while (end < s.length()) {
c = s.charAt(end);
if (((c - 'A') * (c - 'Z') <= 0) || (((c - 'a') * (c - 'z') <= 0))) {
return end;
}
end++;
}
return end;
}
private void addNode(ArrayList<VectorDrawable.VNode> list, char cmd, float[] val) {
list.add(new VectorDrawable.VNode(cmd, val));
}
/**
* parse the floats in the string
* this is an optimized version of
* parseFloat(s.split(",|\\s"));
*
* @param s the string containing a command and list of floats
* @return array of floats
*/
private static float[] getFloats(String s) {
if (s.charAt(0) == 'z' | s.charAt(0) == 'Z') {
return new float[0];
}
try {
float[] tmp = new float[s.length()];
int count = 0;
int pos = 1, end;
while ((end = extract(s, pos)) >= 0) {
if (pos < end) {
tmp[count++] = Float.parseFloat(s.substring(pos, end));
}
pos = end + 1;
}
// handle the final float if there is one
if (pos < s.length()) {
tmp[count++] = Float.parseFloat(s.substring(pos, s.length()));
}
return Arrays.copyOf(tmp, count);
} catch (NumberFormatException e){
Log.e(LOGTAG,"error in parsing \""+s+"\"");
throw e;
}
}
/**
* calculate the position of the next comma or space
* @param s the string to search
* @param start the position to start searching
* @return the position of the next comma or space or -1 if none found
*/
private static int extract(String s, int start) {
int space = s.indexOf(' ', start);
int comma = s.indexOf(',', start);
if (space == -1) {
return comma;
}
if (comma == -1) {
return space;
}
return (comma > space) ? space : comma;
}
private VectorDrawable.VNode[] parsePath(String value) {
int start = 0;
int end = 1;
ArrayList<VectorDrawable.VNode> list = new ArrayList<VectorDrawable.VNode>();
while (end < value.length()) {
end = nextStart(value, end);
String s = value.substring(start, end);
float[] val = getFloats(s);
addNode(list, s.charAt(0), val);
start = end;
end++;
}
if ((end - start) == 1 && start < value.length()) {
addNode(list, value.charAt(start), new float[0]);
}
return list.toArray(new VectorDrawable.VNode[list.size()]);
}
}
private static class VNode {
private char mType;
private float[] mParams;
public VNode(char type, float[] params) {
mType = type;
mParams = params;
}
public VNode(VNode n) {
mType = n.mType;
mParams = Arrays.copyOf(n.mParams, n.mParams.length);
}
public static void createPath(VNode[] node, Path path) {
float[] current = new float[4];
char previousCommand = 'm';
for (int i = 0; i < node.length; i++) {
addCommand(path, current, previousCommand, node[i].mType, node[i].mParams);
previousCommand = node[i].mType;
}
}
private static void addCommand(Path path, float[] current,
char previousCmd, char cmd, float[] val) {
int incr = 2;
float currentX = current[0];
float currentY = current[1];
float ctrlPointX = current[2];
float ctrlPointY = current[3];
float reflectiveCtrlPointX;
float reflectiveCtrlPointY;
switch (cmd) {
case 'z':
case 'Z':
path.close();
return;
case 'm':
case 'M':
case 'l':
case 'L':
case 't':
case 'T':
incr = 2;
break;
case 'h':
case 'H':
case 'v':
case 'V':
incr = 1;
break;
case 'c':
case 'C':
incr = 6;
break;
case 's':
case 'S':
case 'q':
case 'Q':
incr = 4;
break;
case 'a':
case 'A':
incr = 7;
break;
}
for (int k = 0; k < val.length; k += incr) {
switch (cmd) {
case 'm': // moveto - Start a new sub-path (relative)
path.rMoveTo(val[k + 0], val[k + 1]);
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'M': // moveto - Start a new sub-path
path.moveTo(val[k + 0], val[k + 1]);
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'l': // lineto - Draw a line from the current point (relative)
path.rLineTo(val[k + 0], val[k + 1]);
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'L': // lineto - Draw a line from the current point
path.lineTo(val[k + 0], val[k + 1]);
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'z': // closepath - Close the current subpath
case 'Z': // closepath - Close the current subpath
path.close();
break;
case 'h': // horizontal lineto - Draws a horizontal line (relative)
path.rLineTo(val[k + 0], 0);
currentX += val[k + 0];
break;
case 'H': // horizontal lineto - Draws a horizontal line
path.lineTo(val[k + 0], currentY);
currentX = val[k + 0];
break;
case 'v': // vertical lineto - Draws a vertical line from the current point (r)
path.rLineTo(0, val[k + 0]);
currentY += val[k + 0];
break;
case 'V': // vertical lineto - Draws a vertical line from the current point
path.lineTo(currentX, val[k + 0]);
currentY = val[k + 0];
break;
case 'c': // curveto - Draws a cubic Bézier curve (relative)
path.rCubicTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3],
val[k + 4], val[k + 5]);
ctrlPointX = currentX + val[k + 2];
ctrlPointY = currentY + val[k + 3];
currentX += val[k + 4];
currentY += val[k + 5];
break;
case 'C': // curveto - Draws a cubic Bézier curve
path.cubicTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3],
val[k + 4], val[k + 5]);
currentX = val[k + 4];
currentY = val[k + 5];
ctrlPointX = val[k + 2];
ctrlPointY = val[k + 3];
break;
case 's': // smooth curveto - Draws a cubic Bézier curve (reflective cp)
reflectiveCtrlPointX = 0;
reflectiveCtrlPointY = 0;
if (previousCmd == 'c' || previousCmd == 's'
|| previousCmd == 'C' || previousCmd == 'S') {
reflectiveCtrlPointX = currentX - ctrlPointX;
reflectiveCtrlPointY = currentY - ctrlPointY;
}
path.rCubicTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1],
val[k + 2], val[k + 3]);
ctrlPointX = currentX + val[k + 0];
ctrlPointY = currentY + val[k + 1];
currentX += val[k + 2];
currentY += val[k + 3];
break;
case 'S': // shorthand/smooth curveto Draws a cubic Bézier curve(reflective cp)
reflectiveCtrlPointX = currentX;
reflectiveCtrlPointY = currentY;
if (previousCmd == 'c' || previousCmd == 's'
|| previousCmd == 'C' || previousCmd == 'S') {
reflectiveCtrlPointX = 2 * currentX - ctrlPointX;
reflectiveCtrlPointY = 2 * currentY - ctrlPointY;
}
path.cubicTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = val[k + 0];
ctrlPointY = val[k + 1];
currentX = val[k + 2];
currentY = val[k + 3];
break;
case 'q': // Draws a quadratic Bézier (relative)
path.rQuadTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = currentX + val[k + 0];
ctrlPointY = currentY + val[k + 1];
currentX += val[k + 2];
currentY += val[k + 3];
break;
case 'Q': // Draws a quadratic Bézier
path.quadTo(val[k + 0], val[k + 1], val[k + 2], val[k + 3]);
ctrlPointX = val[k + 0];
ctrlPointY = val[k + 1];
currentX = val[k + 2];
currentY = val[k + 3];
break;
case 't': // Draws a quadratic Bézier curve(reflective control point)(relative)
reflectiveCtrlPointX = 0;
reflectiveCtrlPointY = 0;
if (previousCmd == 'q' || previousCmd == 't'
|| previousCmd == 'Q' || previousCmd == 'T') {
reflectiveCtrlPointX = currentX - ctrlPointX;
reflectiveCtrlPointY = currentY - ctrlPointY;
}
path.rQuadTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1]);
ctrlPointX = currentX + reflectiveCtrlPointX;
ctrlPointY = currentY + reflectiveCtrlPointY;
currentX += val[k + 0];
currentY += val[k + 1];
break;
case 'T': // Draws a quadratic Bézier curve (reflective control point)
reflectiveCtrlPointX = currentX;
reflectiveCtrlPointY = currentY;
if (previousCmd == 'q' || previousCmd == 't'
|| previousCmd == 'Q' || previousCmd == 'T') {
reflectiveCtrlPointX = 2 * currentX - ctrlPointX;
reflectiveCtrlPointY = 2 * currentY - ctrlPointY;
}
path.quadTo(reflectiveCtrlPointX, reflectiveCtrlPointY,
val[k + 0], val[k + 1]);
ctrlPointX = reflectiveCtrlPointX;
ctrlPointY = reflectiveCtrlPointY;
currentX = val[k + 0];
currentY = val[k + 1];
break;
case 'a': // Draws an elliptical arc
// (rx ry x-axis-rotation large-arc-flag sweep-flag x y)
drawArc(path,
currentX,
currentY,
val[k + 5] + currentX,
val[k + 6] + currentY,
val[k + 0],
val[k + 1],
val[k + 2],
val[k + 3] != 0,
val[k + 4] != 0);
currentX += val[k + 5];
currentY += val[k + 6];
ctrlPointX = currentX;
ctrlPointY = currentY;
break;
case 'A': // Draws an elliptical arc
drawArc(path,
currentX,
currentY,
val[k + 5],
val[k + 6],
val[k + 0],
val[k + 1],
val[k + 2],
val[k + 3] != 0,
val[k + 4] != 0);
currentX = val[k + 5];
currentY = val[k + 6];
ctrlPointX = currentX;
ctrlPointY = currentY;
break;
}
previousCmd = cmd;
}
current[0] = currentX;
current[1] = currentY;
current[2] = ctrlPointX;
current[3] = ctrlPointY;
}
private static void drawArc(Path p,
float x0,
float y0,
float x1,
float y1,
float a,
float b,
float theta,
boolean isMoreThanHalf,
boolean isPositiveArc) {
/* Convert rotation angle from degrees to radians */
double thetaD = Math.toRadians(theta);
/* Pre-compute rotation matrix entries */
double cosTheta = Math.cos(thetaD);
double sinTheta = Math.sin(thetaD);
/* Transform (x0, y0) and (x1, y1) into unit space */
/* using (inverse) rotation, followed by (inverse) scale */
double x0p = (x0 * cosTheta + y0 * sinTheta) / a;
double y0p = (-x0 * sinTheta + y0 * cosTheta) / b;
double x1p = (x1 * cosTheta + y1 * sinTheta) / a;
double y1p = (-x1 * sinTheta + y1 * cosTheta) / b;
/* Compute differences and averages */
double dx = x0p - x1p;
double dy = y0p - y1p;
double xm = (x0p + x1p) / 2;
double ym = (y0p + y1p) / 2;
/* Solve for intersecting unit circles */
double dsq = dx * dx + dy * dy;
if (dsq == 0.0) {
Log.w(LOGTAG, " Points are coincident");
return; /* Points are coincident */
}
double disc = 1.0 / dsq - 1.0 / 4.0;
if (disc < 0.0) {
Log.w(LOGTAG, "Points are too far apart " + dsq);
float adjust = (float) (Math.sqrt(dsq) / 1.99999);
drawArc(p, x0, y0, x1, y1, a * adjust,
b * adjust, theta, isMoreThanHalf, isPositiveArc);
return; /* Points are too far apart */
}
double s = Math.sqrt(disc);
double sdx = s * dx;
double sdy = s * dy;
double cx;
double cy;
if (isMoreThanHalf == isPositiveArc) {
cx = xm - sdy;
cy = ym + sdx;
} else {
cx = xm + sdy;
cy = ym - sdx;
}
double eta0 = Math.atan2((y0p - cy), (x0p - cx));
double eta1 = Math.atan2((y1p - cy), (x1p - cx));
double sweep = (eta1 - eta0);
if (isPositiveArc != (sweep >= 0)) {
if (sweep > 0) {
sweep -= 2 * Math.PI;
} else {
sweep += 2 * Math.PI;
}
}
cx *= a;
cy *= b;
double tcx = cx;
cx = cx * cosTheta - cy * sinTheta;
cy = tcx * sinTheta + cy * cosTheta;
arcToBezier(p, cx, cy, a, b, x0, y0, thetaD, eta0, sweep);
}
/**
* Converts an arc to cubic Bezier segments and records them in p.
*
* @param p The target for the cubic Bezier segments
* @param cx The x coordinate center of the ellipse
* @param cy The y coordinate center of the ellipse
* @param a The radius of the ellipse in the horizontal direction
* @param b The radius of the ellipse in the vertical direction
* @param e1x E(eta1) x coordinate of the starting point of the arc
* @param e1y E(eta2) y coordinate of the starting point of the arc
* @param theta The angle that the ellipse bounding rectangle makes with horizontal plane
* @param start The start angle of the arc on the ellipse
* @param sweep The angle (positive or negative) of the sweep of the arc on the ellipse
*/
private static void arcToBezier(Path p,
double cx,
double cy,
double a,
double b,
double e1x,
double e1y,
double theta,
double start,
double sweep) {
// Taken from equations at: http://spaceroots.org/documents/ellipse/node8.html
// and http://www.spaceroots.org/documents/ellipse/node22.html
// Maximum of 45 degrees per cubic Bezier segment
int numSegments = Math.abs((int) Math.ceil(sweep * 4 / Math.PI));
double eta1 = start;
double cosTheta = Math.cos(theta);
double sinTheta = Math.sin(theta);
double cosEta1 = Math.cos(eta1);
double sinEta1 = Math.sin(eta1);
double ep1x = (-a * cosTheta * sinEta1) - (b * sinTheta * cosEta1);
double ep1y = (-a * sinTheta * sinEta1) + (b * cosTheta * cosEta1);
double anglePerSegment = sweep / numSegments;
for (int i = 0; i < numSegments; i++) {
double eta2 = eta1 + anglePerSegment;
double sinEta2 = Math.sin(eta2);
double cosEta2 = Math.cos(eta2);
double e2x = cx + (a * cosTheta * cosEta2) - (b * sinTheta * sinEta2);
double e2y = cy + (a * sinTheta * cosEta2) + (b * cosTheta * sinEta2);
double ep2x = -a * cosTheta * sinEta2 - b * sinTheta * cosEta2;
double ep2y = -a * sinTheta * sinEta2 + b * cosTheta * cosEta2;
double tanDiff2 = Math.tan((eta2 - eta1) / 2);
double alpha =
Math.sin(eta2 - eta1) * (Math.sqrt(4 + (3 * tanDiff2 * tanDiff2)) - 1) / 3;
double q1x = e1x + alpha * ep1x;
double q1y = e1y + alpha * ep1y;
double q2x = e2x - alpha * ep2x;
double q2y = e2y - alpha * ep2y;
p.cubicTo((float) q1x,
(float) q1y,
(float) q2x,
(float) q2y,
(float) e2x,
(float) e2y);
eta1 = eta2;
e1x = e2x;
e1y = e2y;
ep1x = ep2x;
ep1y = ep2y;
}
}
}
}

4
tests/VectorDrawableTest/res/anim/trim_path_animation03.xml
View File

@@ -21,6 +21,8 @@
android:duration="6000"
android:propertyName="rotation"
android:valueFrom="0"
android:valueTo="360"/>
android:valueTo="360"
android:interpolator="@interpolator/custom_path_interpolator"
/>
</set>

8
tests/VectorDrawableTest/res/anim/trim_path_animation04.xml
View File

@@ -16,11 +16,9 @@
-->
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<objectAnimator
android:duration="9000"
android:propertyName="rotation"
android:valueFrom="0"
android:valueTo="360"/>
android:propertyXName="translateX"
android:propertyYName="translateY"
android:pathData="m0,0 q 150, 300 150, 0 t 150, 0, t 150, 0 t -150 0 t -150 0 t -150 0 z" />
</set>

3
tests/VectorDrawableTest/res/drawable/animation_vector_drawable01.xml
View File

@@ -32,5 +32,8 @@
<target
android:name="rotationGroupBlue"
android:animation="@anim/trim_path_animation03" />
<target
android:name="rotationGroup"
android:animation="@anim/trim_path_animation04" />
</animated-vector>

2
tests/VectorDrawableTest/res/interpolator/custom_path_interpolator.xml Normal file
View File

@@ -0,0 +1,2 @@
<pathInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
android:pathData="m0,0q0.4,0.05 0.6,0.3t0.3,0.3l0.1,0.4" />