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2a67fa92f0bf3ad625ee53eedfe2c444959f514d
frameworks_base/graphics/java/android/graphics/drawable/VectorDrawable.java
ztenghui 2e17d2b232 Bring back the fillAlpha and strokeAlpha. 
At the same time, remove the group alpha since we did not follow the convention
that group's alpha should apply together, not separately to each elements.

b/17393626

Change-Id: Idfc071414213583924961dc8ea760d6fb317873c
2014-09-10 16:26:48 -07:00

1466 lines
52 KiB
Java
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/*
* 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.graphics.drawable;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathMeasure;
import android.graphics.PixelFormat;
import android.graphics.PorterDuffColorFilter;
import android.graphics.Rect;
import android.graphics.Region;
import android.graphics.PorterDuff.Mode;
import android.util.ArrayMap;
import android.util.AttributeSet;
import android.util.LayoutDirection;
import android.util.Log;
import android.util.PathParser;
import android.util.Xml;
import com.android.internal.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Stack;
/**
* This lets you create a drawable based on an XML vector graphic. It can be
* defined in an XML file with the <code>&lt;vector></code> element.
* <p/>
* The vector drawable has the following elements:
* <p/>
* <dt><code>&lt;vector></code></dt>
* <dl>
* <dd>Used to defined a vector drawable
* <dl>
* <dt><code>android:width</code></dt>
* <dd>Used to defined the intrinsic width of the drawable.
* This support all the dimension units, normally specified with dp.</dd>
* <dt><code>android:height</code></dt>
* <dd>Used to defined the intrinsic height the drawable.
* This support all the dimension units, normally specified with dp.</dd>
* <dt><code>android:viewportWidth</code></dt>
* <dd>Used to defined the width of the viewport space. Viewport is basically
* the virtual canvas where the paths are drawn on.</dd>
* <dt><code>android:viewportHeight</code></dt>
* <dd>Used to defined the height of the viewport space. Viewport is basically
* the virtual canvas where the paths are drawn on.</dd>
* <dt><code>android:tint</code></dt>
* <dd>The color to apply to the drawable as a tint. By default, no tint is applied.</dd>
* <dt><code>android:tintMode</code></dt>
* <dd>The Porter-Duff blending mode for the tint color. The default value is src_in.</dd>
* <dt><code>android:autoMirrored</code></dt>
* <dd>Indicates if the drawable needs to be mirrored when its layout direction is
* RTL (right-to-left).</dd>
* </dl></dd>
* </dl>
*
* <dl>
* <dt><code>&lt;group></code></dt>
* <dd>Defines a group of paths or subgroups, plus transformation information.
* The transformations are defined in the same coordinates as the viewport.
* And the transformations are applied in the order of scale, rotate then translate.
* <dl>
* <dt><code>android:rotation</code></dt>
* <dd>The degrees of rotation of the group.</dd>
* <dt><code>android:pivotX</code></dt>
* <dd>The X coordinate of the pivot for the scale and rotation of the group.
* This is defined in the viewport space.</dd>
* <dt><code>android:pivotY</code></dt>
* <dd>The Y coordinate of the pivot for the scale and rotation of the group.
* This is defined in the viewport space.</dd>
* <dt><code>android:scaleX</code></dt>
* <dd>The amount of scale on the X Coordinate.</dd>
* <dt><code>android:scaleY</code></dt>
* <dd>The amount of scale on the Y coordinate.</dd>
* <dt><code>android:translateX</code></dt>
* <dd>The amount of translation on the X coordinate.
* This is defined in the viewport space.</dd>
* <dt><code>android:translateY</code></dt>
* <dd>The amount of translation on the Y coordinate.
* This is defined in the viewport space.</dd>
* </dl></dd>
* </dl>
*
* <dl>
* <dt><code>&lt;path></code></dt>
* <dd>Defines paths to be drawn.
* <dl>
* <dt><code>android:name</code></dt>
* <dd>Defines the name of the path.</dd>
* <dt><code>android:pathData</code></dt>
* <dd>Defines path string. This is using exactly same format as "d" attribute
* in the SVG's path data. This is defined in the viewport space.</dd>
* <dt><code>android:fillColor</code></dt>
* <dd>Defines the color to fill the path (none if not present).</dd>
* <dt><code>android:strokeColor</code></dt>
* <dd>Defines the color to draw the path outline (none if not present).</dd>
* <dt><code>android:strokeWidth</code></dt>
* <dd>The width a path stroke.</dd>
* <dt><code>android:strokeAlpha</code></dt>
* <dd>The opacity of a path stroke.</dd>
* <dt><code>android:fillAlpha</code></dt>
* <dd>The opacity to fill the path with.</dd>
* <dt><code>android:trimPathStart</code></dt>
* <dd>The fraction of the path to trim from the start, in the range from 0 to 1.</dd>
* <dt><code>android:trimPathEnd</code></dt>
* <dd>The fraction of the path to trim from the end, in the range from 0 to 1.</dd>
* <dt><code>android:trimPathOffset</code></dt>
* <dd>Shift trim region (allows showed region to include the start and end), in the range
* from 0 to 1.</dd>
* <dt><code>android:strokeLineCap</code></dt>
* <dd>Sets the linecap for a stroked path: butt, round, square.</dd>
* <dt><code>android:strokeLineJoin</code></dt>
* <dd>Sets the lineJoin for a stroked path: miter,round,bevel.</dd>
* <dt><code>android:strokeMiterLimit</code></dt>
* <dd>Sets the Miter limit for a stroked path.</dd>
* </dl></dd>
* </dl>
*
* <dl>
* <dt><code>&lt;clip-path></code></dt>
* <dd>Defines path to be the current clip.
* <dl>
* <dt><code>android:name</code></dt>
* <dd>Defines the name of the clip path.</dd>
* <dt><code>android:pathData</code></dt>
* <dd>Defines clip path string. This is using exactly same format as "d" attribute
* in the SVG's path data.</dd>
* </dl></dd>
* </dl>
* <li>Here is a simple VectorDrawable in this vectordrawable.xml file.
* <pre>
* &lt;vector xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
* android:height=&quot;64dp&quot;
* android:width=&quot;64dp&quot;
* android:viewportHeight=&quot;600&quot;
* android:viewportWidth=&quot;600&quot; &gt;
* &lt;group
* android:name=&quot;rotationGroup&quot;
* android:pivotX=&quot;300.0&quot;
* android:pivotY=&quot;300.0&quot;
* android:rotation=&quot;45.0&quot; &gt;
* &lt;path
* android:name=&quot;v&quot;
* android:fillColor=&quot;#000000&quot;
* android:pathData=&quot;M300,70 l 0,-70 70,70 0,0 -70,70z&quot; /&gt;
* &lt;/group&gt;
* &lt;/vector&gt;
* </pre></li>
*/
public class VectorDrawable extends Drawable {
private static final String LOGTAG = VectorDrawable.class.getSimpleName();
private static final String SHAPE_CLIP_PATH = "clip-path";
private static final String SHAPE_GROUP = "group";
private static final String SHAPE_PATH = "path";
private static final String SHAPE_VECTOR = "vector";
private static final int LINECAP_BUTT = 0;
private static final int LINECAP_ROUND = 1;
private static final int LINECAP_SQUARE = 2;
private static final int LINEJOIN_MITER = 0;
private static final int LINEJOIN_ROUND = 1;
private static final int LINEJOIN_BEVEL = 2;
private static final boolean DBG_VECTOR_DRAWABLE = false;
private VectorDrawableState mVectorState;
private PorterDuffColorFilter mTintFilter;
private boolean mMutated;
// AnimatedVectorDrawable needs to turn off the cache all the time, otherwise,
// caching the bitmap by default is allowed.
private boolean mAllowCaching = true;
public VectorDrawable() {
mVectorState = new VectorDrawableState();
}
private VectorDrawable(VectorDrawableState state, Resources res, Theme theme) {
if (theme != null && state.canApplyTheme()) {
// If we need to apply a theme, implicitly mutate.
mVectorState = new VectorDrawableState(state);
applyTheme(theme);
} else {
mVectorState = state;
}
mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode);
mVectorState.mVPathRenderer.setColorFilter(mTintFilter);
}
@Override
public Drawable mutate() {
if (!mMutated && super.mutate() == this) {
mVectorState = new VectorDrawableState(mVectorState);
mMutated = true;
}
return this;
}
Object getTargetByName(String name) {
return mVectorState.mVPathRenderer.mVGTargetsMap.get(name);
}
@Override
public ConstantState getConstantState() {
mVectorState.mChangingConfigurations = getChangingConfigurations();
return mVectorState;
}
@Override
public void draw(Canvas canvas) {
final Rect bounds = getBounds();
if (bounds.width() == 0 || bounds.height() == 0) {
// too small to draw
return;
}
final int saveCount = canvas.save();
final boolean needMirroring = needMirroring();
canvas.translate(bounds.left, bounds.top);
if (needMirroring) {
canvas.translate(bounds.width(), 0);
canvas.scale(-1.0f, 1.0f);
}
if (!mAllowCaching) {
mVectorState.mVPathRenderer.draw(canvas, bounds.width(), bounds.height());
} else {
Bitmap bitmap = mVectorState.mCachedBitmap;
if (bitmap == null || !mVectorState.canReuseCache(bounds.width(),
bounds.height())) {
bitmap = Bitmap.createBitmap(bounds.width(), bounds.height(),
Bitmap.Config.ARGB_8888);
Canvas tmpCanvas = new Canvas(bitmap);
mVectorState.mVPathRenderer.draw(tmpCanvas, bounds.width(), bounds.height());
mVectorState.mCachedBitmap = bitmap;
mVectorState.updateCacheStates();
}
// The bitmap's size is the same as the bounds.
canvas.drawBitmap(bitmap, 0, 0, null);
}
canvas.restoreToCount(saveCount);
}
@Override
public int getAlpha() {
return mVectorState.mVPathRenderer.getRootAlpha();
}
@Override
public void setAlpha(int alpha) {
if (mVectorState.mVPathRenderer.getRootAlpha() != alpha) {
mVectorState.mVPathRenderer.setRootAlpha(alpha);
invalidateSelf();
}
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
final VectorDrawableState state = mVectorState;
if (colorFilter != null) {
// Color filter overrides tint.
mTintFilter = null;
} else if (state.mTint != null && state.mTintMode != null) {
// Restore the tint filter, if we need one.
final int color = state.mTint.getColorForState(getState(), Color.TRANSPARENT);
mTintFilter = new PorterDuffColorFilter(color, state.mTintMode);
colorFilter = mTintFilter;
}
state.mVPathRenderer.setColorFilter(colorFilter);
invalidateSelf();
}
@Override
public void setTintList(ColorStateList tint) {
final VectorDrawableState state = mVectorState;
if (state.mTint != tint) {
state.mTint = tint;
mTintFilter = updateTintFilter(mTintFilter, tint, state.mTintMode);
state.mVPathRenderer.setColorFilter(mTintFilter);
invalidateSelf();
}
}
@Override
public void setTintMode(Mode tintMode) {
final VectorDrawableState state = mVectorState;
if (state.mTintMode != tintMode) {
state.mTintMode = tintMode;
mTintFilter = updateTintFilter(mTintFilter, state.mTint, tintMode);
state.mVPathRenderer.setColorFilter(mTintFilter);
invalidateSelf();
}
}
@Override
protected boolean onStateChange(int[] stateSet) {
final VectorDrawableState state = mVectorState;
if (state.mTint != null && state.mTintMode != null) {
mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode);
mVectorState.mVPathRenderer.setColorFilter(mTintFilter);
return true;
}
return false;
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public int getIntrinsicWidth() {
return (int) mVectorState.mVPathRenderer.mBaseWidth;
}
@Override
public int getIntrinsicHeight() {
return (int) mVectorState.mVPathRenderer.mBaseHeight;
}
@Override
public boolean canApplyTheme() {
return super.canApplyTheme() || mVectorState != null && mVectorState.canApplyTheme();
}
@Override
public void applyTheme(Theme t) {
super.applyTheme(t);
final VectorDrawableState state = mVectorState;
final VPathRenderer path = state.mVPathRenderer;
if (path != null && path.canApplyTheme()) {
path.applyTheme(t);
}
}
/**
* The size of a pixel when scaled from the intrinsic dimension to the viewport dimension.
* This is used to calculate the path animation accuracy.
*
* @hide
*/
public float getPixelSize() {
if (mVectorState == null && mVectorState.mVPathRenderer == null ||
mVectorState.mVPathRenderer.mBaseWidth == 0 ||
mVectorState.mVPathRenderer.mBaseHeight == 0 ||
mVectorState.mVPathRenderer.mViewportHeight == 0 ||
mVectorState.mVPathRenderer.mViewportWidth == 0) {
return 1; // fall back to 1:1 pixel mapping.
}
float intrinsicWidth = mVectorState.mVPathRenderer.mBaseWidth;
float intrinsicHeight = mVectorState.mVPathRenderer.mBaseHeight;
float viewportWidth = mVectorState.mVPathRenderer.mViewportWidth;
float viewportHeight = mVectorState.mVPathRenderer.mViewportHeight;
float scaleX = viewportWidth / intrinsicWidth;
float scaleY = viewportHeight / intrinsicHeight;
return Math.min(scaleX, scaleY);
}
/** @hide */
public static VectorDrawable create(Resources resources, int rid) {
try {
final XmlPullParser parser = resources.getXml(rid);
final AttributeSet attrs = Xml.asAttributeSet(parser);
int type;
while ((type=parser.next()) != XmlPullParser.START_TAG &&
type != XmlPullParser.END_DOCUMENT) {
// Empty loop
}
if (type != XmlPullParser.START_TAG) {
throw new XmlPullParserException("No start tag found");
}
final VectorDrawable drawable = new VectorDrawable();
drawable.inflate(resources, parser, attrs);
return drawable;
} catch (XmlPullParserException e) {
Log.e(LOGTAG, "parser error", e);
} catch (IOException e) {
Log.e(LOGTAG, "parser error", e);
}
return null;
}
private static int applyAlpha(int color, float alpha) {
int alphaBytes = Color.alpha(color);
color &= 0x00FFFFFF;
color |= ((int) (alphaBytes * alpha)) << 24;
return color;
}
@Override
public void inflate(Resources res, XmlPullParser parser, AttributeSet attrs, Theme theme)
throws XmlPullParserException, IOException {
final VectorDrawableState state = mVectorState;
final VPathRenderer pathRenderer = new VPathRenderer();
state.mVPathRenderer = pathRenderer;
TypedArray a = obtainAttributes(res, theme, attrs, R.styleable.VectorDrawable);
updateStateFromTypedArray(a);
a.recycle();
state.mCacheDirty = true;
inflateInternal(res, parser, attrs, theme);
mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode);
state.mVPathRenderer.setColorFilter(mTintFilter);
}
private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
final VectorDrawableState state = mVectorState;
final VPathRenderer pathRenderer = state.mVPathRenderer;
// Account for any configuration changes.
state.mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
state.mThemeAttrs = a.extractThemeAttrs();
final int tintMode = a.getInt(R.styleable.VectorDrawable_tintMode, -1);
if (tintMode != -1) {
state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN);
}
final ColorStateList tint = a.getColorStateList(R.styleable.VectorDrawable_tint);
if (tint != null) {
state.mTint = tint;
}
state.mAutoMirrored = a.getBoolean(
R.styleable.VectorDrawable_autoMirrored, state.mAutoMirrored);
pathRenderer.mViewportWidth = a.getFloat(
R.styleable.VectorDrawable_viewportWidth, pathRenderer.mViewportWidth);
pathRenderer.mViewportHeight = a.getFloat(
R.styleable.VectorDrawable_viewportHeight, pathRenderer.mViewportHeight);
if (pathRenderer.mViewportWidth <= 0) {
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires viewportWidth > 0");
} else if (pathRenderer.mViewportHeight <= 0) {
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires viewportHeight > 0");
}
pathRenderer.mBaseWidth = a.getDimension(
R.styleable.VectorDrawable_width, pathRenderer.mBaseWidth);
pathRenderer.mBaseHeight = a.getDimension(
R.styleable.VectorDrawable_height, pathRenderer.mBaseHeight);
if (pathRenderer.mBaseWidth <= 0) {
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires width > 0");
} else if (pathRenderer.mBaseHeight <= 0) {
throw new XmlPullParserException(a.getPositionDescription() +
"<vector> tag requires height > 0");
}
}
private void inflateInternal(Resources res, XmlPullParser parser, AttributeSet attrs,
Theme theme) throws XmlPullParserException, IOException {
final VectorDrawableState state = mVectorState;
final VPathRenderer pathRenderer = state.mVPathRenderer;
boolean noPathTag = true;
// Use a stack to help to build the group tree.
// The top of the stack is always the current group.
final Stack<VGroup> groupStack = new Stack<VGroup>();
groupStack.push(pathRenderer.mRootGroup);
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
final String tagName = parser.getName();
final VGroup currentGroup = groupStack.peek();
if (SHAPE_PATH.equals(tagName)) {
final VFullPath path = new VFullPath();
path.inflate(res, attrs, theme);
currentGroup.mChildren.add(path);
if (path.getPathName() != null) {
pathRenderer.mVGTargetsMap.put(path.getPathName(), path);
}
noPathTag = false;
state.mChangingConfigurations |= path.mChangingConfigurations;
} else if (SHAPE_CLIP_PATH.equals(tagName)) {
final VClipPath path = new VClipPath();
path.inflate(res, attrs, theme);
currentGroup.mChildren.add(path);
if (path.getPathName() != null) {
pathRenderer.mVGTargetsMap.put(path.getPathName(), path);
}
state.mChangingConfigurations |= path.mChangingConfigurations;
} else if (SHAPE_GROUP.equals(tagName)) {
VGroup newChildGroup = new VGroup();
newChildGroup.inflate(res, attrs, theme);
currentGroup.mChildren.add(newChildGroup);
groupStack.push(newChildGroup);
if (newChildGroup.getGroupName() != null) {
pathRenderer.mVGTargetsMap.put(newChildGroup.getGroupName(),
newChildGroup);
}
state.mChangingConfigurations |= newChildGroup.mChangingConfigurations;
}
} else if (eventType == XmlPullParser.END_TAG) {
final String tagName = parser.getName();
if (SHAPE_GROUP.equals(tagName)) {
groupStack.pop();
}
}
eventType = parser.next();
}
// Print the tree out for debug.
if (DBG_VECTOR_DRAWABLE) {
printGroupTree(pathRenderer.mRootGroup, 0);
}
if (noPathTag) {
final StringBuffer tag = new StringBuffer();
if (tag.length() > 0) {
tag.append(" or ");
}
tag.append(SHAPE_PATH);
throw new XmlPullParserException("no " + tag + " defined");
}
}
private void printGroupTree(VGroup currentGroup, int level) {
String indent = "";
for (int i = 0; i < level; i++) {
indent += " ";
}
// Print the current node
Log.v(LOGTAG, indent + "current group is :" + currentGroup.getGroupName()
+ " rotation is " + currentGroup.mRotate);
Log.v(LOGTAG, indent + "matrix is :" + currentGroup.getLocalMatrix().toString());
// Then print all the children groups
for (int i = 0; i < currentGroup.mChildren.size(); i++) {
Object child = currentGroup.mChildren.get(i);
if (child instanceof VGroup) {
printGroupTree((VGroup) child, level + 1);
}
}
}
@Override
public int getChangingConfigurations() {
return super.getChangingConfigurations() | mVectorState.mChangingConfigurations;
}
void setAllowCaching(boolean allowCaching) {
mAllowCaching = allowCaching;
}
private boolean needMirroring() {
return isAutoMirrored() && getLayoutDirection() == LayoutDirection.RTL;
}
@Override
public void setAutoMirrored(boolean mirrored) {
if (mVectorState.mAutoMirrored != mirrored) {
mVectorState.mAutoMirrored = mirrored;
invalidateSelf();
}
}
@Override
public boolean isAutoMirrored() {
return mVectorState.mAutoMirrored;
}
private static class VectorDrawableState extends ConstantState {
int[] mThemeAttrs;
int mChangingConfigurations;
VPathRenderer mVPathRenderer;
ColorStateList mTint;
Mode mTintMode;
boolean mAutoMirrored;
Bitmap mCachedBitmap;
int[] mCachedThemeAttrs;
ColorStateList mCachedTint;
Mode mCachedTintMode;
int mCachedRootAlpha;
boolean mCachedAutoMirrored;
boolean mCacheDirty;
// Deep copy for mutate() or implicitly mutate.
public VectorDrawableState(VectorDrawableState copy) {
if (copy != null) {
mThemeAttrs = copy.mThemeAttrs;
mChangingConfigurations = copy.mChangingConfigurations;
mVPathRenderer = new VPathRenderer(copy.mVPathRenderer);
if (copy.mVPathRenderer.mFillPaint != null) {
mVPathRenderer.mFillPaint = new Paint(copy.mVPathRenderer.mFillPaint);
}
if (copy.mVPathRenderer.mStrokePaint != null) {
mVPathRenderer.mStrokePaint = new Paint(copy.mVPathRenderer.mStrokePaint);
}
if (copy.mVPathRenderer.mColorFilter != null) {
mVPathRenderer.mColorFilter = copy.mVPathRenderer.mColorFilter;
}
mTint = copy.mTint;
mTintMode = copy.mTintMode;
mAutoMirrored = copy.mAutoMirrored;
}
}
public boolean canReuseCache(int width, int height) {
if (!mCacheDirty
&& mCachedThemeAttrs == mThemeAttrs
&& mCachedTint == mTint
&& mCachedTintMode == mTintMode
&& mCachedAutoMirrored == mAutoMirrored
&& width == mCachedBitmap.getWidth()
&& height == mCachedBitmap.getHeight()
&& mCachedRootAlpha == mVPathRenderer.getRootAlpha()) {
return true;
}
return false;
}
public void updateCacheStates() {
// Use shallow copy here and shallow comparison in canReuseCache(),
// likely hit cache miss more, but practically not much difference.
mCachedThemeAttrs = mThemeAttrs;
mCachedTint = mTint;
mCachedTintMode = mTintMode;
mCachedRootAlpha = mVPathRenderer.getRootAlpha();
mCachedAutoMirrored = mAutoMirrored;
mCacheDirty = false;
}
public VectorDrawableState() {
mVPathRenderer = new VPathRenderer();
}
@Override
public Drawable newDrawable() {
return new VectorDrawable(this, null, null);
}
@Override
public Drawable newDrawable(Resources res) {
return new VectorDrawable(this, res, null);
}
@Override
public Drawable newDrawable(Resources res, Theme theme) {
return new VectorDrawable(this, res, theme);
}
@Override
public int getChangingConfigurations() {
return mChangingConfigurations;
}
}
private static class VPathRenderer {
/* Right now the internal data structure is organized as a tree.
* Each node can be a group node, or a path.
* A group node can have groups or paths as children, but a path node has
* no children.
* One example can be:
* Root Group
* / | \
* Group Path Group
* / \ |
* Path Path Path
*
*/
// Variables that only used temporarily inside the draw() call, so there
// is no need for deep copying.
private final Path mPath;
private final Path mRenderPath;
private static final Matrix IDENTITY_MATRIX = new Matrix();
private final Matrix mFinalPathMatrix = new Matrix();
private Paint mStrokePaint;
private Paint mFillPaint;
private ColorFilter mColorFilter;
private PathMeasure mPathMeasure;
/////////////////////////////////////////////////////
// Variables below need to be copied (deep copy if applicable) for mutation.
private int mChangingConfigurations;
private final VGroup mRootGroup;
float mBaseWidth = 0;
float mBaseHeight = 0;
float mViewportWidth = 0;
float mViewportHeight = 0;
private int mRootAlpha = 0xFF;
final ArrayMap<String, Object> mVGTargetsMap = new ArrayMap<String, Object>();
public VPathRenderer() {
mRootGroup = new VGroup();
mPath = new Path();
mRenderPath = new Path();
}
public void setRootAlpha(int alpha) {
mRootAlpha = alpha;
}
public int getRootAlpha() {
return mRootAlpha;
}
public VPathRenderer(VPathRenderer copy) {
mRootGroup = new VGroup(copy.mRootGroup, mVGTargetsMap);
mPath = new Path(copy.mPath);
mRenderPath = new Path(copy.mRenderPath);
mBaseWidth = copy.mBaseWidth;
mBaseHeight = copy.mBaseHeight;
mViewportWidth = copy.mViewportWidth;
mViewportHeight = copy.mViewportHeight;
mChangingConfigurations = copy.mChangingConfigurations;
mRootAlpha = copy.mRootAlpha;
}
public boolean canApplyTheme() {
// If one of the paths can apply theme, then return true;
return recursiveCanApplyTheme(mRootGroup);
}
private boolean recursiveCanApplyTheme(VGroup currentGroup) {
// We can do a tree traverse here, if there is one path return true,
// then we return true for the whole tree.
final ArrayList<Object> children = currentGroup.mChildren;
for (int i = 0; i < children.size(); i++) {
Object child = children.get(i);
if (child instanceof VGroup) {
VGroup childGroup = (VGroup) child;
if (childGroup.canApplyTheme()
|| recursiveCanApplyTheme(childGroup)) {
return true;
}
} else if (child instanceof VPath) {
VPath childPath = (VPath) child;
if (childPath.canApplyTheme()) {
return true;
}
}
}
return false;
}
public void applyTheme(Theme t) {
// Apply theme to every path of the tree.
recursiveApplyTheme(mRootGroup, t);
}
private void recursiveApplyTheme(VGroup currentGroup, Theme t) {
// We can do a tree traverse here, apply theme to all paths which
// can apply theme.
final ArrayList<Object> children = currentGroup.mChildren;
for (int i = 0; i < children.size(); i++) {
Object child = children.get(i);
if (child instanceof VGroup) {
VGroup childGroup = (VGroup) child;
if (childGroup.canApplyTheme()) {
childGroup.applyTheme(t);
}
recursiveApplyTheme(childGroup, t);
} else if (child instanceof VPath) {
VPath childPath = (VPath) child;
if (childPath.canApplyTheme()) {
childPath.applyTheme(t);
}
}
}
}
public void setColorFilter(ColorFilter colorFilter) {
mColorFilter = colorFilter;
if (mFillPaint != null) {
mFillPaint.setColorFilter(colorFilter);
}
if (mStrokePaint != null) {
mStrokePaint.setColorFilter(colorFilter);
}
}
private void drawGroupTree(VGroup currentGroup, Matrix currentMatrix,
Canvas canvas, int w, int h) {
// Calculate current group's matrix by preConcat the parent's and
// and the current one on the top of the stack.
// Basically the Mfinal = Mviewport * M0 * M1 * M2;
// Mi the local matrix at level i of the group tree.
currentGroup.mStackedMatrix.set(currentMatrix);
currentGroup.mStackedMatrix.preConcat(currentGroup.mLocalMatrix);
// Draw the group tree in the same order as the XML file.
for (int i = 0; i < currentGroup.mChildren.size(); i++) {
Object child = currentGroup.mChildren.get(i);
if (child instanceof VGroup) {
VGroup childGroup = (VGroup) child;
drawGroupTree(childGroup, currentGroup.mStackedMatrix,
canvas, w, h);
} else if (child instanceof VPath) {
VPath childPath = (VPath) child;
drawPath(currentGroup, childPath, canvas, w, h);
}
}
}
public void draw(Canvas canvas, int w, int h) {
// Travese the tree in pre-order to draw.
drawGroupTree(mRootGroup, IDENTITY_MATRIX, canvas, w, h);
}
private void drawPath(VGroup vGroup, VPath vPath, Canvas canvas, int w, int h) {
final float scaleX = w / mViewportWidth;
final float scaleY = h / mViewportHeight;
final float minScale = Math.min(scaleX, scaleY);
mFinalPathMatrix.set(vGroup.mStackedMatrix);
mFinalPathMatrix.postScale(scaleX, scaleY);
vPath.toPath(mPath);
final Path path = mPath;
mRenderPath.reset();
if (vPath.isClipPath()) {
mRenderPath.addPath(path, mFinalPathMatrix);
canvas.clipPath(mRenderPath, Region.Op.REPLACE);
} else {
VFullPath fullPath = (VFullPath) vPath;
if (fullPath.mTrimPathStart != 0.0f || fullPath.mTrimPathEnd != 1.0f) {
float start = (fullPath.mTrimPathStart + fullPath.mTrimPathOffset) % 1.0f;
float end = (fullPath.mTrimPathEnd + fullPath.mTrimPathOffset) % 1.0f;
if (mPathMeasure == null) {
mPathMeasure = new PathMeasure();
}
mPathMeasure.setPath(mPath, false);
float len = mPathMeasure.getLength();
start = start * len;
end = end * len;
path.reset();
if (start > end) {
mPathMeasure.getSegment(start, len, path, true);
mPathMeasure.getSegment(0f, end, path, true);
} else {
mPathMeasure.getSegment(start, end, path, true);
}
path.rLineTo(0, 0); // fix bug in measure
}
mRenderPath.addPath(path, mFinalPathMatrix);
if (fullPath.mFillColor != Color.TRANSPARENT) {
if (mFillPaint == null) {
mFillPaint = new Paint();
mFillPaint.setColorFilter(mColorFilter);
mFillPaint.setStyle(Paint.Style.FILL);
mFillPaint.setAntiAlias(true);
}
mFillPaint.setColor(applyAlpha(fullPath.mFillColor,
fullPath.mFillAlpha));
canvas.drawPath(mRenderPath, mFillPaint);
}
if (fullPath.mStrokeColor != Color.TRANSPARENT) {
if (mStrokePaint == null) {
mStrokePaint = new Paint();
mStrokePaint.setColorFilter(mColorFilter);
mStrokePaint.setStyle(Paint.Style.STROKE);
mStrokePaint.setAntiAlias(true);
}
final Paint strokePaint = mStrokePaint;
if (fullPath.mStrokeLineJoin != null) {
strokePaint.setStrokeJoin(fullPath.mStrokeLineJoin);
}
if (fullPath.mStrokeLineCap != null) {
strokePaint.setStrokeCap(fullPath.mStrokeLineCap);
}
strokePaint.setStrokeMiter(fullPath.mStrokeMiterlimit);
strokePaint.setColor(applyAlpha(fullPath.mStrokeColor,
fullPath.mStrokeAlpha));
strokePaint.setStrokeWidth(fullPath.mStrokeWidth * minScale);
canvas.drawPath(mRenderPath, strokePaint);
}
}
}
}
private static class VGroup {
// mStackedMatrix is only used temporarily when drawing, it combines all
// the parents' local matrices with the current one.
private final Matrix mStackedMatrix = new Matrix();
/////////////////////////////////////////////////////
// Variables below need to be copied (deep copy if applicable) for mutation.
final ArrayList<Object> mChildren = new ArrayList<Object>();
private float mRotate = 0;
private float mPivotX = 0;
private float mPivotY = 0;
private float mScaleX = 1;
private float mScaleY = 1;
private float mTranslateX = 0;
private float mTranslateY = 0;
// mLocalMatrix is updated based on the update of transformation information,
// either parsed from the XML or by animation.
private final Matrix mLocalMatrix = new Matrix();
private int mChangingConfigurations;
private int[] mThemeAttrs;
private String mGroupName = null;
public VGroup(VGroup copy, ArrayMap<String, Object> targetsMap) {
mRotate = copy.mRotate;
mPivotX = copy.mPivotX;
mPivotY = copy.mPivotY;
mScaleX = copy.mScaleX;
mScaleY = copy.mScaleY;
mTranslateX = copy.mTranslateX;
mTranslateY = copy.mTranslateY;
mThemeAttrs = copy.mThemeAttrs;
mGroupName = copy.mGroupName;
mChangingConfigurations = copy.mChangingConfigurations;
if (mGroupName != null) {
targetsMap.put(mGroupName, this);
}
mLocalMatrix.set(copy.mLocalMatrix);
final ArrayList<Object> children = copy.mChildren;
for (int i = 0; i < children.size(); i++) {
Object copyChild = children.get(i);
if (copyChild instanceof VGroup) {
VGroup copyGroup = (VGroup) copyChild;
mChildren.add(new VGroup(copyGroup, targetsMap));
} else {
VPath newPath = null;
if (copyChild instanceof VFullPath) {
newPath = new VFullPath((VFullPath) copyChild);
} else if (copyChild instanceof VClipPath) {
newPath = new VClipPath((VClipPath) copyChild);
} else {
throw new IllegalStateException("Unknown object in the tree!");
}
mChildren.add(newPath);
if (newPath.mPathName != null) {
targetsMap.put(newPath.mPathName, newPath);
}
}
}
}
public VGroup() {
}
public String getGroupName() {
return mGroupName;
}
public Matrix getLocalMatrix() {
return mLocalMatrix;
}
public boolean canApplyTheme() {
return mThemeAttrs != null;
}
public void inflate(Resources res, AttributeSet attrs, Theme theme) {
final TypedArray a = obtainAttributes(res, theme, attrs,
R.styleable.VectorDrawableGroup);
updateStateFromTypedArray(a);
a.recycle();
}
private void updateStateFromTypedArray(TypedArray a) {
// Account for any configuration changes.
mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
mThemeAttrs = a.extractThemeAttrs();
mRotate = a.getFloat(R.styleable.VectorDrawableGroup_rotation, mRotate);
mPivotX = a.getFloat(R.styleable.VectorDrawableGroup_pivotX, mPivotX);
mPivotY = a.getFloat(R.styleable.VectorDrawableGroup_pivotY, mPivotY);
mScaleX = a.getFloat(R.styleable.VectorDrawableGroup_scaleX, mScaleX);
mScaleY = a.getFloat(R.styleable.VectorDrawableGroup_scaleY, mScaleY);
mTranslateX = a.getFloat(R.styleable.VectorDrawableGroup_translateX, mTranslateX);
mTranslateY = a.getFloat(R.styleable.VectorDrawableGroup_translateY, mTranslateY);
final String groupName = a.getString(R.styleable.VectorDrawableGroup_name);
if (groupName != null) {
mGroupName = groupName;
}
updateLocalMatrix();
}
public void applyTheme(Theme t) {
if (mThemeAttrs == null) {
return;
}
final TypedArray a = t.resolveAttributes(mThemeAttrs,
R.styleable.VectorDrawableGroup);
updateStateFromTypedArray(a);
a.recycle();
}
private void updateLocalMatrix() {
// The order we apply is the same as the
// RenderNode.cpp::applyViewPropertyTransforms().
mLocalMatrix.reset();
mLocalMatrix.postTranslate(-mPivotX, -mPivotY);
mLocalMatrix.postScale(mScaleX, mScaleY);
mLocalMatrix.postRotate(mRotate, 0, 0);
mLocalMatrix.postTranslate(mTranslateX + mPivotX, mTranslateY + mPivotY);
}
/* Setters and Getters, used by animator from AnimatedVectorDrawable. */
@SuppressWarnings("unused")
public float getRotation() {
return mRotate;
}
@SuppressWarnings("unused")
public void setRotation(float rotation) {
if (rotation != mRotate) {
mRotate = rotation;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getPivotX() {
return mPivotX;
}
@SuppressWarnings("unused")
public void setPivotX(float pivotX) {
if (pivotX != mPivotX) {
mPivotX = pivotX;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getPivotY() {
return mPivotY;
}
@SuppressWarnings("unused")
public void setPivotY(float pivotY) {
if (pivotY != mPivotY) {
mPivotY = pivotY;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getScaleX() {
return mScaleX;
}
@SuppressWarnings("unused")
public void setScaleX(float scaleX) {
if (scaleX != mScaleX) {
mScaleX = scaleX;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getScaleY() {
return mScaleY;
}
@SuppressWarnings("unused")
public void setScaleY(float scaleY) {
if (scaleY != mScaleY) {
mScaleY = scaleY;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getTranslateX() {
return mTranslateX;
}
@SuppressWarnings("unused")
public void setTranslateX(float translateX) {
if (translateX != mTranslateX) {
mTranslateX = translateX;
updateLocalMatrix();
}
}
@SuppressWarnings("unused")
public float getTranslateY() {
return mTranslateY;
}
@SuppressWarnings("unused")
public void setTranslateY(float translateY) {
if (translateY != mTranslateY) {
mTranslateY = translateY;
updateLocalMatrix();
}
}
}
/**
* Common Path information for clip path and normal path.
*/
private static class VPath {
protected PathParser.PathDataNode[] mNodes = null;
String mPathName;
int mChangingConfigurations;
public VPath() {
// Empty constructor.
}
public VPath(VPath copy) {
mPathName = copy.mPathName;
mChangingConfigurations = copy.mChangingConfigurations;
mNodes = PathParser.deepCopyNodes(copy.mNodes);
}
public void toPath(Path path) {
path.reset();
if (mNodes != null) {
PathParser.PathDataNode.nodesToPath(mNodes, path);
}
}
public String getPathName() {
return mPathName;
}
public boolean canApplyTheme() {
return false;
}
public void applyTheme(Theme t) {
}
public boolean isClipPath() {
return false;
}
/* Setters and Getters, used by animator from AnimatedVectorDrawable. */
@SuppressWarnings("unused")
public PathParser.PathDataNode[] getPathData() {
return mNodes;
}
@SuppressWarnings("unused")
public void setPathData(PathParser.PathDataNode[] nodes) {
if (!PathParser.canMorph(mNodes, nodes)) {
// This should not happen in the middle of animation.
mNodes = PathParser.deepCopyNodes(nodes);
} else {
PathParser.updateNodes(mNodes, nodes);
}
}
}
/**
* Clip path, which only has name and pathData.
*/
private static class VClipPath extends VPath{
public VClipPath() {
// Empty constructor.
}
public VClipPath(VClipPath copy) {
super(copy);
}
public void inflate(Resources r, AttributeSet attrs, Theme theme) {
final TypedArray a = obtainAttributes(r, theme, attrs,
R.styleable.VectorDrawableClipPath);
updateStateFromTypedArray(a);
a.recycle();
}
private void updateStateFromTypedArray(TypedArray a) {
// Account for any configuration changes.
mChangingConfigurations |= a.getChangingConfigurations();
mPathName = a.getString(R.styleable.VectorDrawableClipPath_name);
mNodes = PathParser.createNodesFromPathData(a.getString(
R.styleable.VectorDrawableClipPath_pathData));
}
@Override
public boolean isClipPath() {
return true;
}
}
/**
* Normal path, which contains all the fill / paint information.
*/
private static class VFullPath extends VPath {
/////////////////////////////////////////////////////
// Variables below need to be copied (deep copy if applicable) for mutation.
private int[] mThemeAttrs;
int mStrokeColor = Color.TRANSPARENT;
float mStrokeWidth = 0;
int mFillColor = Color.TRANSPARENT;
float mStrokeAlpha = 1.0f;
int mFillRule;
float mFillAlpha = 1.0f;
float mTrimPathStart = 0;
float mTrimPathEnd = 1;
float mTrimPathOffset = 0;
Paint.Cap mStrokeLineCap = Paint.Cap.BUTT;
Paint.Join mStrokeLineJoin = Paint.Join.MITER;
float mStrokeMiterlimit = 4;
public VFullPath() {
// Empty constructor.
}
public VFullPath(VFullPath copy) {
super(copy);
mThemeAttrs = copy.mThemeAttrs;
mStrokeColor = copy.mStrokeColor;
mStrokeWidth = copy.mStrokeWidth;
mStrokeAlpha = copy.mStrokeAlpha;
mFillColor = copy.mFillColor;
mFillRule = copy.mFillRule;
mFillAlpha = copy.mFillAlpha;
mTrimPathStart = copy.mTrimPathStart;
mTrimPathEnd = copy.mTrimPathEnd;
mTrimPathOffset = copy.mTrimPathOffset;
mStrokeLineCap = copy.mStrokeLineCap;
mStrokeLineJoin = copy.mStrokeLineJoin;
mStrokeMiterlimit = copy.mStrokeMiterlimit;
}
private Paint.Cap getStrokeLineCap(int id, Paint.Cap defValue) {
switch (id) {
case LINECAP_BUTT:
return Paint.Cap.BUTT;
case LINECAP_ROUND:
return Paint.Cap.ROUND;
case LINECAP_SQUARE:
return Paint.Cap.SQUARE;
default:
return defValue;
}
}
private Paint.Join getStrokeLineJoin(int id, Paint.Join defValue) {
switch (id) {
case LINEJOIN_MITER:
return Paint.Join.MITER;
case LINEJOIN_ROUND:
return Paint.Join.ROUND;
case LINEJOIN_BEVEL:
return Paint.Join.BEVEL;
default:
return defValue;
}
}
@Override
public boolean canApplyTheme() {
return mThemeAttrs != null;
}
public void inflate(Resources r, AttributeSet attrs, Theme theme) {
final TypedArray a = obtainAttributes(r, theme, attrs,
R.styleable.VectorDrawablePath);
updateStateFromTypedArray(a);
a.recycle();
}
private void updateStateFromTypedArray(TypedArray a) {
// Account for any configuration changes.
mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
mThemeAttrs = a.extractThemeAttrs();
mPathName = a.getString(R.styleable.VectorDrawablePath_name);
mNodes = PathParser.createNodesFromPathData(a.getString(
R.styleable.VectorDrawablePath_pathData));
mFillColor = a.getColor(R.styleable.VectorDrawablePath_fillColor,
mFillColor);
mFillAlpha = a.getFloat(R.styleable.VectorDrawablePath_fillAlpha,
mFillAlpha);
mStrokeLineCap = getStrokeLineCap(a.getInt(
R.styleable.VectorDrawablePath_strokeLineCap, -1), mStrokeLineCap);
mStrokeLineJoin = getStrokeLineJoin(a.getInt(
R.styleable.VectorDrawablePath_strokeLineJoin, -1), mStrokeLineJoin);
mStrokeMiterlimit = a.getFloat(
R.styleable.VectorDrawablePath_strokeMiterLimit, mStrokeMiterlimit);
mStrokeColor = a.getColor(R.styleable.VectorDrawablePath_strokeColor,
mStrokeColor);
mStrokeAlpha = a.getFloat(R.styleable.VectorDrawablePath_strokeAlpha,
mStrokeAlpha);
mStrokeWidth = a.getFloat(R.styleable.VectorDrawablePath_strokeWidth,
mStrokeWidth);
mTrimPathEnd = a.getFloat(R.styleable.VectorDrawablePath_trimPathEnd,
mTrimPathEnd);
mTrimPathOffset = a.getFloat(
R.styleable.VectorDrawablePath_trimPathOffset, mTrimPathOffset);
mTrimPathStart = a.getFloat(
R.styleable.VectorDrawablePath_trimPathStart, mTrimPathStart);
}
@Override
public void applyTheme(Theme t) {
if (mThemeAttrs == null) {
return;
}
final TypedArray a = t.resolveAttributes(mThemeAttrs,
R.styleable.VectorDrawablePath);
updateStateFromTypedArray(a);
a.recycle();
}
/* Setters and Getters, used by animator from AnimatedVectorDrawable. */
@SuppressWarnings("unused")
int getStroke() {
return mStrokeColor;
}
@SuppressWarnings("unused")
void setStroke(int strokeColor) {
mStrokeColor = strokeColor;
}
@SuppressWarnings("unused")
float getStrokeWidth() {
return mStrokeWidth;
}
@SuppressWarnings("unused")
void setStrokeWidth(float strokeWidth) {
mStrokeWidth = strokeWidth;
}
@SuppressWarnings("unused")
float getstrokeAlpha() {
return mStrokeAlpha;
}
@SuppressWarnings("unused")
void setstrokeAlpha(float strokeAlpha) {
mStrokeAlpha = strokeAlpha;
}
@SuppressWarnings("unused")
int getFill() {
return mFillColor;
}
@SuppressWarnings("unused")
void setFill(int fillColor) {
mFillColor = fillColor;
}
@SuppressWarnings("unused")
float getfillAlpha() {
return mFillAlpha;
}
@SuppressWarnings("unused")
void setfillAlpha(float fillAlpha) {
mFillAlpha = fillAlpha;
}
@SuppressWarnings("unused")
float getTrimPathStart() {
return mTrimPathStart;
}
@SuppressWarnings("unused")
void setTrimPathStart(float trimPathStart) {
mTrimPathStart = trimPathStart;
}
@SuppressWarnings("unused")
float getTrimPathEnd() {
return mTrimPathEnd;
}
@SuppressWarnings("unused")
void setTrimPathEnd(float trimPathEnd) {
mTrimPathEnd = trimPathEnd;
}
@SuppressWarnings("unused")
float getTrimPathOffset() {
return mTrimPathOffset;
}
@SuppressWarnings("unused")
void setTrimPathOffset(float trimPathOffset) {
mTrimPathOffset = trimPathOffset;
}
}
}
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