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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "VectorDrawable.h"
     18 
     19 #include "PathParser.h"
     20 #include "SkColorFilter.h"
     21 #include "SkImageInfo.h"
     22 #include "SkShader.h"
     23 #include <utils/Log.h>
     24 #include "utils/Macros.h"
     25 #include "utils/VectorDrawableUtils.h"
     26 
     27 #include <math.h>
     28 #include <string.h>
     29 
     30 namespace android {
     31 namespace uirenderer {
     32 namespace VectorDrawable {
     33 
     34 const int Tree::MAX_CACHED_BITMAP_SIZE = 2048;
     35 
     36 void Path::draw(SkCanvas* outCanvas, const SkMatrix& groupStackedMatrix, float scaleX, float scaleY,
     37         bool useStagingData) {
     38     float matrixScale = getMatrixScale(groupStackedMatrix);
     39     if (matrixScale == 0) {
     40         // When either x or y is scaled to 0, we don't need to draw anything.
     41         return;
     42     }
     43 
     44     SkMatrix pathMatrix(groupStackedMatrix);
     45     pathMatrix.postScale(scaleX, scaleY);
     46 
     47     //TODO: try apply the path matrix to the canvas instead of creating a new path.
     48     SkPath renderPath;
     49     renderPath.reset();
     50 
     51     if (useStagingData) {
     52         SkPath tmpPath;
     53         getStagingPath(&tmpPath);
     54         renderPath.addPath(tmpPath, pathMatrix);
     55     } else {
     56         renderPath.addPath(getUpdatedPath(), pathMatrix);
     57     }
     58 
     59     float minScale = fmin(scaleX, scaleY);
     60     float strokeScale = minScale * matrixScale;
     61     drawPath(outCanvas, renderPath, strokeScale, pathMatrix, useStagingData);
     62 }
     63 
     64 void Path::dump() {
     65     ALOGD("Path: %s has %zu points", mName.c_str(), mProperties.getData().points.size());
     66 }
     67 
     68 float Path::getMatrixScale(const SkMatrix& groupStackedMatrix) {
     69     // Given unit vectors A = (0, 1) and B = (1, 0).
     70     // After matrix mapping, we got A' and B'. Let theta = the angel b/t A' and B'.
     71     // Therefore, the final scale we want is min(|A'| * sin(theta), |B'| * sin(theta)),
     72     // which is (|A'| * |B'| * sin(theta)) / max (|A'|, |B'|);
     73     // If  max (|A'|, |B'|) = 0, that means either x or y has a scale of 0.
     74     //
     75     // For non-skew case, which is most of the cases, matrix scale is computing exactly the
     76     // scale on x and y axis, and take the minimal of these two.
     77     // For skew case, an unit square will mapped to a parallelogram. And this function will
     78     // return the minimal height of the 2 bases.
     79     SkVector skVectors[2];
     80     skVectors[0].set(0, 1);
     81     skVectors[1].set(1, 0);
     82     groupStackedMatrix.mapVectors(skVectors, 2);
     83     float scaleX = hypotf(skVectors[0].fX, skVectors[0].fY);
     84     float scaleY = hypotf(skVectors[1].fX, skVectors[1].fY);
     85     float crossProduct = skVectors[0].cross(skVectors[1]);
     86     float maxScale = fmax(scaleX, scaleY);
     87 
     88     float matrixScale = 0;
     89     if (maxScale > 0) {
     90         matrixScale = fabs(crossProduct) / maxScale;
     91     }
     92     return matrixScale;
     93 }
     94 
     95 // Called from UI thread during the initial setup/theme change.
     96 Path::Path(const char* pathStr, size_t strLength) {
     97     PathParser::ParseResult result;
     98     Data data;
     99     PathParser::getPathDataFromAsciiString(&data, &result, pathStr, strLength);
    100     mStagingProperties.setData(data);
    101 }
    102 
    103 Path::Path(const Path& path) : Node(path) {
    104     mStagingProperties.syncProperties(path.mStagingProperties);
    105 }
    106 
    107 const SkPath& Path::getUpdatedPath() {
    108     if (mSkPathDirty) {
    109         mSkPath.reset();
    110         VectorDrawableUtils::verbsToPath(&mSkPath, mProperties.getData());
    111         mSkPathDirty = false;
    112     }
    113     return mSkPath;
    114 }
    115 
    116 void Path::getStagingPath(SkPath* outPath) {
    117     outPath->reset();
    118     VectorDrawableUtils::verbsToPath(outPath, mStagingProperties.getData());
    119 }
    120 
    121 void Path::syncProperties() {
    122     if (mStagingPropertiesDirty) {
    123         mProperties.syncProperties(mStagingProperties);
    124     } else {
    125         mStagingProperties.syncProperties(mProperties);
    126     }
    127     mStagingPropertiesDirty = false;
    128 }
    129 
    130 FullPath::FullPath(const FullPath& path) : Path(path) {
    131     mStagingProperties.syncProperties(path.mStagingProperties);
    132 }
    133 
    134 static void applyTrim(SkPath* outPath, const SkPath& inPath, float trimPathStart, float trimPathEnd,
    135         float trimPathOffset) {
    136     if (trimPathStart == 0.0f && trimPathEnd == 1.0f) {
    137         *outPath = inPath;
    138         return;
    139     }
    140     outPath->reset();
    141     if (trimPathStart == trimPathEnd) {
    142         // Trimmed path should be empty.
    143         return;
    144     }
    145     SkPathMeasure measure(inPath, false);
    146     float len = SkScalarToFloat(measure.getLength());
    147     float start = len * fmod((trimPathStart + trimPathOffset), 1.0f);
    148     float end = len * fmod((trimPathEnd + trimPathOffset), 1.0f);
    149 
    150     if (start > end) {
    151         measure.getSegment(start, len, outPath, true);
    152         if (end > 0) {
    153             measure.getSegment(0, end, outPath, true);
    154         }
    155     } else {
    156         measure.getSegment(start, end, outPath, true);
    157     }
    158 }
    159 
    160 const SkPath& FullPath::getUpdatedPath() {
    161     if (!mSkPathDirty && !mProperties.mTrimDirty) {
    162         return mTrimmedSkPath;
    163     }
    164     Path::getUpdatedPath();
    165     if (mProperties.getTrimPathStart() != 0.0f || mProperties.getTrimPathEnd() != 1.0f) {
    166         mProperties.mTrimDirty = false;
    167         applyTrim(&mTrimmedSkPath, mSkPath, mProperties.getTrimPathStart(),
    168                 mProperties.getTrimPathEnd(), mProperties.getTrimPathOffset());
    169         return mTrimmedSkPath;
    170     } else {
    171         return mSkPath;
    172     }
    173 }
    174 
    175 void FullPath::getStagingPath(SkPath* outPath) {
    176     Path::getStagingPath(outPath);
    177     SkPath inPath = *outPath;
    178     applyTrim(outPath, inPath, mStagingProperties.getTrimPathStart(),
    179             mStagingProperties.getTrimPathEnd(), mStagingProperties.getTrimPathOffset());
    180 }
    181 
    182 void FullPath::dump() {
    183     Path::dump();
    184     ALOGD("stroke width, color, alpha: %f, %d, %f, fill color, alpha: %d, %f",
    185             mProperties.getStrokeWidth(), mProperties.getStrokeColor(), mProperties.getStrokeAlpha(),
    186             mProperties.getFillColor(), mProperties.getFillAlpha());
    187 }
    188 
    189 
    190 inline SkColor applyAlpha(SkColor color, float alpha) {
    191     int alphaBytes = SkColorGetA(color);
    192     return SkColorSetA(color, alphaBytes * alpha);
    193 }
    194 
    195 void FullPath::drawPath(SkCanvas* outCanvas, SkPath& renderPath, float strokeScale,
    196                         const SkMatrix& matrix, bool useStagingData){
    197     const FullPathProperties& properties = useStagingData ? mStagingProperties : mProperties;
    198 
    199     // Draw path's fill, if fill color or gradient is valid
    200     bool needsFill = false;
    201     SkPaint paint;
    202     if (properties.getFillGradient() != nullptr) {
    203         paint.setColor(applyAlpha(SK_ColorBLACK, properties.getFillAlpha()));
    204         SkShader* newShader = properties.getFillGradient()->newWithLocalMatrix(matrix);
    205         paint.setShader(newShader);
    206         needsFill = true;
    207     } else if (properties.getFillColor() != SK_ColorTRANSPARENT) {
    208         paint.setColor(applyAlpha(properties.getFillColor(), properties.getFillAlpha()));
    209         needsFill = true;
    210     }
    211 
    212     if (needsFill) {
    213         paint.setStyle(SkPaint::Style::kFill_Style);
    214         paint.setAntiAlias(true);
    215         SkPath::FillType ft = static_cast<SkPath::FillType>(properties.getFillType());
    216         renderPath.setFillType(ft);
    217         outCanvas->drawPath(renderPath, paint);
    218     }
    219 
    220     // Draw path's stroke, if stroke color or Gradient is valid
    221     bool needsStroke = false;
    222     if (properties.getStrokeGradient() != nullptr) {
    223         paint.setColor(applyAlpha(SK_ColorBLACK, properties.getStrokeAlpha()));
    224         SkShader* newShader = properties.getStrokeGradient()->newWithLocalMatrix(matrix);
    225         paint.setShader(newShader);
    226         needsStroke = true;
    227     } else if (properties.getStrokeColor() != SK_ColorTRANSPARENT) {
    228         paint.setColor(applyAlpha(properties.getStrokeColor(), properties.getStrokeAlpha()));
    229         needsStroke = true;
    230     }
    231     if (needsStroke) {
    232         paint.setStyle(SkPaint::Style::kStroke_Style);
    233         paint.setAntiAlias(true);
    234         paint.setStrokeJoin(SkPaint::Join(properties.getStrokeLineJoin()));
    235         paint.setStrokeCap(SkPaint::Cap(properties.getStrokeLineCap()));
    236         paint.setStrokeMiter(properties.getStrokeMiterLimit());
    237         paint.setStrokeWidth(properties.getStrokeWidth() * strokeScale);
    238         outCanvas->drawPath(renderPath, paint);
    239     }
    240 }
    241 
    242 void FullPath::syncProperties() {
    243     Path::syncProperties();
    244 
    245     if (mStagingPropertiesDirty) {
    246         mProperties.syncProperties(mStagingProperties);
    247     } else {
    248         // Update staging property with property values from animation.
    249         mStagingProperties.syncProperties(mProperties);
    250     }
    251     mStagingPropertiesDirty = false;
    252 }
    253 
    254 REQUIRE_COMPATIBLE_LAYOUT(FullPath::FullPathProperties::PrimitiveFields);
    255 
    256 static_assert(sizeof(float) == sizeof(int32_t), "float is not the same size as int32_t");
    257 static_assert(sizeof(SkColor) == sizeof(int32_t), "SkColor is not the same size as int32_t");
    258 
    259 bool FullPath::FullPathProperties::copyProperties(int8_t* outProperties, int length) const {
    260     int propertyDataSize = sizeof(FullPathProperties::PrimitiveFields);
    261     if (length != propertyDataSize) {
    262         LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
    263                 propertyDataSize, length);
    264         return false;
    265     }
    266 
    267     PrimitiveFields* out = reinterpret_cast<PrimitiveFields*>(outProperties);
    268     *out = mPrimitiveFields;
    269     return true;
    270 }
    271 
    272 void FullPath::FullPathProperties::setColorPropertyValue(int propertyId, int32_t value) {
    273     Property currentProperty = static_cast<Property>(propertyId);
    274     if (currentProperty == Property::strokeColor) {
    275         setStrokeColor(value);
    276     } else if (currentProperty == Property::fillColor) {
    277         setFillColor(value);
    278     } else {
    279         LOG_ALWAYS_FATAL("Error setting color property on FullPath: No valid property"
    280                 " with id: %d", propertyId);
    281     }
    282 }
    283 
    284 void FullPath::FullPathProperties::setPropertyValue(int propertyId, float value) {
    285     Property property = static_cast<Property>(propertyId);
    286     switch (property) {
    287     case Property::strokeWidth:
    288         setStrokeWidth(value);
    289         break;
    290     case Property::strokeAlpha:
    291         setStrokeAlpha(value);
    292         break;
    293     case Property::fillAlpha:
    294         setFillAlpha(value);
    295         break;
    296     case Property::trimPathStart:
    297         setTrimPathStart(value);
    298         break;
    299     case Property::trimPathEnd:
    300         setTrimPathEnd(value);
    301         break;
    302     case Property::trimPathOffset:
    303         setTrimPathOffset(value);
    304         break;
    305     default:
    306         LOG_ALWAYS_FATAL("Invalid property id: %d for animation", propertyId);
    307         break;
    308     }
    309 }
    310 
    311 void ClipPath::drawPath(SkCanvas* outCanvas, SkPath& renderPath,
    312         float strokeScale, const SkMatrix& matrix, bool useStagingData){
    313     outCanvas->clipPath(renderPath, SkRegion::kIntersect_Op);
    314 }
    315 
    316 Group::Group(const Group& group) : Node(group) {
    317     mStagingProperties.syncProperties(group.mStagingProperties);
    318 }
    319 
    320 void Group::draw(SkCanvas* outCanvas, const SkMatrix& currentMatrix, float scaleX,
    321         float scaleY, bool useStagingData) {
    322     // TODO: Try apply the matrix to the canvas instead of passing it down the tree
    323 
    324     // Calculate current group's matrix by preConcat the parent's and
    325     // and the current one on the top of the stack.
    326     // Basically the Mfinal = Mviewport * M0 * M1 * M2;
    327     // Mi the local matrix at level i of the group tree.
    328     SkMatrix stackedMatrix;
    329     const GroupProperties& prop = useStagingData ? mStagingProperties : mProperties;
    330     getLocalMatrix(&stackedMatrix, prop);
    331     stackedMatrix.postConcat(currentMatrix);
    332 
    333     // Save the current clip information, which is local to this group.
    334     outCanvas->save();
    335     // Draw the group tree in the same order as the XML file.
    336     for (auto& child : mChildren) {
    337         child->draw(outCanvas, stackedMatrix, scaleX, scaleY, useStagingData);
    338     }
    339     // Restore the previous clip information.
    340     outCanvas->restore();
    341 }
    342 
    343 void Group::dump() {
    344     ALOGD("Group %s has %zu children: ", mName.c_str(), mChildren.size());
    345     ALOGD("Group translateX, Y : %f, %f, scaleX, Y: %f, %f", mProperties.getTranslateX(),
    346             mProperties.getTranslateY(), mProperties.getScaleX(), mProperties.getScaleY());
    347     for (size_t i = 0; i < mChildren.size(); i++) {
    348         mChildren[i]->dump();
    349     }
    350 }
    351 
    352 void Group::syncProperties() {
    353     // Copy over the dirty staging properties
    354     if (mStagingPropertiesDirty) {
    355         mProperties.syncProperties(mStagingProperties);
    356     } else {
    357         mStagingProperties.syncProperties(mProperties);
    358     }
    359     mStagingPropertiesDirty = false;
    360     for (auto& child : mChildren) {
    361         child->syncProperties();
    362     }
    363 }
    364 
    365 void Group::getLocalMatrix(SkMatrix* outMatrix, const GroupProperties& properties) {
    366     outMatrix->reset();
    367     // TODO: use rotate(mRotate, mPivotX, mPivotY) and scale with pivot point, instead of
    368     // translating to pivot for rotating and scaling, then translating back.
    369     outMatrix->postTranslate(-properties.getPivotX(), -properties.getPivotY());
    370     outMatrix->postScale(properties.getScaleX(), properties.getScaleY());
    371     outMatrix->postRotate(properties.getRotation(), 0, 0);
    372     outMatrix->postTranslate(properties.getTranslateX() + properties.getPivotX(),
    373             properties.getTranslateY() + properties.getPivotY());
    374 }
    375 
    376 void Group::addChild(Node* child) {
    377     mChildren.emplace_back(child);
    378     if (mPropertyChangedListener != nullptr) {
    379         child->setPropertyChangedListener(mPropertyChangedListener);
    380     }
    381 }
    382 
    383 bool Group::GroupProperties::copyProperties(float* outProperties, int length) const {
    384     int propertyCount = static_cast<int>(Property::count);
    385     if (length != propertyCount) {
    386         LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
    387                 propertyCount, length);
    388         return false;
    389     }
    390 
    391     PrimitiveFields* out = reinterpret_cast<PrimitiveFields*>(outProperties);
    392     *out = mPrimitiveFields;
    393     return true;
    394 }
    395 
    396 // TODO: Consider animating the properties as float pointers
    397 // Called on render thread
    398 float Group::GroupProperties::getPropertyValue(int propertyId) const {
    399     Property currentProperty = static_cast<Property>(propertyId);
    400     switch (currentProperty) {
    401     case Property::rotate:
    402         return getRotation();
    403     case Property::pivotX:
    404         return getPivotX();
    405     case Property::pivotY:
    406         return getPivotY();
    407     case Property::scaleX:
    408         return getScaleX();
    409     case Property::scaleY:
    410         return getScaleY();
    411     case Property::translateX:
    412         return getTranslateX();
    413     case Property::translateY:
    414         return getTranslateY();
    415     default:
    416         LOG_ALWAYS_FATAL("Invalid property index: %d", propertyId);
    417         return 0;
    418     }
    419 }
    420 
    421 // Called on render thread
    422 void Group::GroupProperties::setPropertyValue(int propertyId, float value) {
    423     Property currentProperty = static_cast<Property>(propertyId);
    424     switch (currentProperty) {
    425     case Property::rotate:
    426         setRotation(value);
    427         break;
    428     case Property::pivotX:
    429         setPivotX(value);
    430         break;
    431     case Property::pivotY:
    432         setPivotY(value);
    433         break;
    434     case Property::scaleX:
    435         setScaleX(value);
    436         break;
    437     case Property::scaleY:
    438         setScaleY(value);
    439         break;
    440     case Property::translateX:
    441         setTranslateX(value);
    442         break;
    443     case Property::translateY:
    444         setTranslateY(value);
    445         break;
    446     default:
    447         LOG_ALWAYS_FATAL("Invalid property index: %d", propertyId);
    448     }
    449 }
    450 
    451 bool Group::isValidProperty(int propertyId) {
    452     return GroupProperties::isValidProperty(propertyId);
    453 }
    454 
    455 bool Group::GroupProperties::isValidProperty(int propertyId) {
    456     return propertyId >= 0 && propertyId < static_cast<int>(Property::count);
    457 }
    458 
    459 int Tree::draw(Canvas* outCanvas, SkColorFilter* colorFilter,
    460         const SkRect& bounds, bool needsMirroring, bool canReuseCache) {
    461     // The imageView can scale the canvas in different ways, in order to
    462     // avoid blurry scaling, we have to draw into a bitmap with exact pixel
    463     // size first. This bitmap size is determined by the bounds and the
    464     // canvas scale.
    465     SkMatrix canvasMatrix;
    466     outCanvas->getMatrix(&canvasMatrix);
    467     float canvasScaleX = 1.0f;
    468     float canvasScaleY = 1.0f;
    469     if (canvasMatrix.getSkewX() == 0 && canvasMatrix.getSkewY() == 0) {
    470         // Only use the scale value when there's no skew or rotation in the canvas matrix.
    471         // TODO: Add a cts test for drawing VD on a canvas with negative scaling factors.
    472         canvasScaleX = fabs(canvasMatrix.getScaleX());
    473         canvasScaleY = fabs(canvasMatrix.getScaleY());
    474     }
    475     int scaledWidth = (int) (bounds.width() * canvasScaleX);
    476     int scaledHeight = (int) (bounds.height() * canvasScaleY);
    477     scaledWidth = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledWidth);
    478     scaledHeight = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledHeight);
    479 
    480     if (scaledWidth <= 0 || scaledHeight <= 0) {
    481         return 0;
    482     }
    483 
    484     mStagingProperties.setScaledSize(scaledWidth, scaledHeight);
    485     int saveCount = outCanvas->save(SaveFlags::MatrixClip);
    486     outCanvas->translate(bounds.fLeft, bounds.fTop);
    487 
    488     // Handle RTL mirroring.
    489     if (needsMirroring) {
    490         outCanvas->translate(bounds.width(), 0);
    491         outCanvas->scale(-1.0f, 1.0f);
    492     }
    493     mStagingProperties.setColorFilter(colorFilter);
    494 
    495     // At this point, canvas has been translated to the right position.
    496     // And we use this bound for the destination rect for the drawBitmap, so
    497     // we offset to (0, 0);
    498     SkRect tmpBounds = bounds;
    499     tmpBounds.offsetTo(0, 0);
    500     mStagingProperties.setBounds(tmpBounds);
    501     outCanvas->drawVectorDrawable(this);
    502     outCanvas->restoreToCount(saveCount);
    503     return scaledWidth * scaledHeight;
    504 }
    505 
    506 void Tree::drawStaging(Canvas* outCanvas) {
    507     bool redrawNeeded = allocateBitmapIfNeeded(&mStagingCache.bitmap,
    508             mStagingProperties.getScaledWidth(), mStagingProperties.getScaledHeight());
    509     // draw bitmap cache
    510     if (redrawNeeded || mStagingCache.dirty) {
    511         updateBitmapCache(&mStagingCache.bitmap, true);
    512         mStagingCache.dirty = false;
    513     }
    514 
    515     SkPaint tmpPaint;
    516     SkPaint* paint = updatePaint(&tmpPaint, &mStagingProperties);
    517     outCanvas->drawBitmap(mStagingCache.bitmap, 0, 0,
    518             mStagingCache.bitmap.width(), mStagingCache.bitmap.height(),
    519             mStagingProperties.getBounds().left(), mStagingProperties.getBounds().top(),
    520             mStagingProperties.getBounds().right(), mStagingProperties.getBounds().bottom(), paint);
    521 }
    522 
    523 SkPaint* Tree::getPaint() {
    524     return updatePaint(&mPaint, &mProperties);
    525 }
    526 
    527 // Update the given paint with alpha and color filter. Return nullptr if no color filter is
    528 // specified and root alpha is 1. Otherwise, return updated paint.
    529 SkPaint* Tree::updatePaint(SkPaint* outPaint, TreeProperties* prop) {
    530     if (prop->getRootAlpha() == 1.0f && prop->getColorFilter() == nullptr) {
    531         return nullptr;
    532     } else {
    533         outPaint->setColorFilter(prop->getColorFilter());
    534         outPaint->setFilterQuality(kLow_SkFilterQuality);
    535         outPaint->setAlpha(prop->getRootAlpha() * 255);
    536         return outPaint;
    537     }
    538 }
    539 
    540 const SkBitmap& Tree::getBitmapUpdateIfDirty() {
    541     bool redrawNeeded = allocateBitmapIfNeeded(&mCache.bitmap, mProperties.getScaledWidth(),
    542             mProperties.getScaledHeight());
    543     if (redrawNeeded || mCache.dirty) {
    544         updateBitmapCache(&mCache.bitmap, false);
    545         mCache.dirty = false;
    546     }
    547     return mCache.bitmap;
    548 }
    549 
    550 void Tree::updateBitmapCache(SkBitmap* outCache, bool useStagingData) {
    551     outCache->eraseColor(SK_ColorTRANSPARENT);
    552     SkCanvas outCanvas(*outCache);
    553     float viewportWidth = useStagingData ?
    554             mStagingProperties.getViewportWidth() : mProperties.getViewportWidth();
    555     float viewportHeight = useStagingData ?
    556             mStagingProperties.getViewportHeight() : mProperties.getViewportHeight();
    557     float scaleX = outCache->width() / viewportWidth;
    558     float scaleY = outCache->height() / viewportHeight;
    559     mRootNode->draw(&outCanvas, SkMatrix::I(), scaleX, scaleY, useStagingData);
    560 }
    561 
    562 bool Tree::allocateBitmapIfNeeded(SkBitmap* outCache, int width, int height) {
    563     if (!canReuseBitmap(*outCache, width, height)) {
    564         SkImageInfo info = SkImageInfo::Make(width, height,
    565                 kN32_SkColorType, kPremul_SkAlphaType);
    566         outCache->setInfo(info);
    567         // TODO: Count the bitmap cache against app's java heap
    568         outCache->allocPixels(info);
    569         return true;
    570     }
    571     return false;
    572 }
    573 
    574 bool Tree::canReuseBitmap(const SkBitmap& bitmap, int width, int height) {
    575     return width == bitmap.width() && height == bitmap.height();
    576 }
    577 
    578 void Tree::onPropertyChanged(TreeProperties* prop) {
    579     if (prop == &mStagingProperties) {
    580         mStagingCache.dirty = true;
    581     } else {
    582         mCache.dirty = true;
    583     }
    584 }
    585 
    586 }; // namespace VectorDrawable
    587 
    588 }; // namespace uirenderer
    589 }; // namespace android
    590