libs/hwui/VectorDrawable.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "VectorDrawable.h"

 #include "PathParser.h"
 #include "SkImageInfo.h"
 #include <utils/Log.h>
 #include "utils/Macros.h"
 #include "utils/VectorDrawableUtils.h"

 #include <math.h>
 #include <string.h>

 namespace android {
 namespace uirenderer {
 namespace VectorDrawable {

 const int Tree::MAX_CACHED_BITMAP_SIZE = 2048;

 void Path::draw(Canvas* outCanvas, const SkMatrix& groupStackedMatrix, float scaleX, float scaleY) {
     float matrixScale = getMatrixScale(groupStackedMatrix);
     if (matrixScale == 0) {
         // When either x or y is scaled to 0, we don't need to draw anything.
         return;
     }

     const SkPath updatedPath = getUpdatedPath();
     SkMatrix pathMatrix(groupStackedMatrix);
     pathMatrix.postScale(scaleX, scaleY);

     //TODO: try apply the path matrix to the canvas instead of creating a new path.
     SkPath renderPath;
     renderPath.reset();
     renderPath.addPath(updatedPath, pathMatrix);

     float minScale = fmin(scaleX, scaleY);
     float strokeScale = minScale * matrixScale;
     drawPath(outCanvas, renderPath, strokeScale);
 }

 void Path::setPathData(const Data& data) {
     if (mData == data) {
         return;
     }
     // Updates the path data. Note that we don't generate a new Skia path right away
     // because there are cases where the animation is changing the path data, but the view
     // that hosts the VD has gone off screen, in which case we won't even draw. So we
     // postpone the Skia path generation to the draw time.
     mData = data;
     mSkPathDirty = true;
 }

 void Path::dump() {
     ALOGD("Path: %s has %zu points", mName.c_str(), mData.points.size());
 }

 float Path::getMatrixScale(const SkMatrix& groupStackedMatrix) {
     // Given unit vectors A = (0, 1) and B = (1, 0).
     // After matrix mapping, we got A' and B'. Let theta = the angel b/t A' and B'.
     // Therefore, the final scale we want is min(|A'| * sin(theta), |B'| * sin(theta)),
     // which is (|A'| * |B'| * sin(theta)) / max (|A'|, |B'|);
     // If  max (|A'|, |B'|) = 0, that means either x or y has a scale of 0.
     //
     // For non-skew case, which is most of the cases, matrix scale is computing exactly the
     // scale on x and y axis, and take the minimal of these two.
     // For skew case, an unit square will mapped to a parallelogram. And this function will
     // return the minimal height of the 2 bases.
     SkVector skVectors[2];
     skVectors[0].set(0, 1);
     skVectors[1].set(1, 0);
     groupStackedMatrix.mapVectors(skVectors, 2);
     float scaleX = hypotf(skVectors[0].fX, skVectors[0].fY);
     float scaleY = hypotf(skVectors[1].fX, skVectors[1].fY);
     float crossProduct = skVectors[0].cross(skVectors[1]);
     float maxScale = fmax(scaleX, scaleY);

     float matrixScale = 0;
     if (maxScale > 0) {
         matrixScale = fabs(crossProduct) / maxScale;
     }
     return matrixScale;
 }
 Path::Path(const char* pathStr, size_t strLength) {
     PathParser::ParseResult result;
     PathParser::getPathDataFromString(&mData, &result, pathStr, strLength);
     if (!result.failureOccurred) {
         VectorDrawableUtils::verbsToPath(&mSkPath, mData);
     }
 }

 Path::Path(const Data& data) {
     mData = data;
     // Now we need to construct a path
     VectorDrawableUtils::verbsToPath(&mSkPath, data);
 }

 Path::Path(const Path& path) : Node(path) {
     mData = path.mData;
     VectorDrawableUtils::verbsToPath(&mSkPath, mData);
 }

 bool Path::canMorph(const Data& morphTo) {
     return VectorDrawableUtils::canMorph(mData, morphTo);
 }

 bool Path::canMorph(const Path& path) {
     return canMorph(path.mData);
 }

 const SkPath& Path::getUpdatedPath() {
     if (mSkPathDirty) {
         mSkPath.reset();
         VectorDrawableUtils::verbsToPath(&mSkPath, mData);
         mSkPathDirty = false;
     }
     return mSkPath;
 }

 void Path::setPath(const char* pathStr, size_t strLength) {
     PathParser::ParseResult result;
     mSkPathDirty = true;
     PathParser::getPathDataFromString(&mData, &result, pathStr, strLength);
 }

 FullPath::FullPath(const FullPath& path) : Path(path) {
     mStrokeWidth = path.mStrokeWidth;
     mStrokeColor = path.mStrokeColor;
     mStrokeAlpha = path.mStrokeAlpha;
     mFillColor = path.mFillColor;
     mFillAlpha = path.mFillAlpha;
     mTrimPathStart = path.mTrimPathStart;
     mTrimPathEnd = path.mTrimPathEnd;
     mTrimPathOffset = path.mTrimPathOffset;
     mStrokeMiterLimit = path.mStrokeMiterLimit;
     mStrokeLineCap = path.mStrokeLineCap;
     mStrokeLineJoin = path.mStrokeLineJoin;
 }

 const SkPath& FullPath::getUpdatedPath() {
     if (!mSkPathDirty && !mTrimDirty) {
         return mTrimmedSkPath;
     }
     Path::getUpdatedPath();
     if (mTrimPathStart != 0.0f || mTrimPathEnd != 1.0f) {
         applyTrim();
         return mTrimmedSkPath;
     } else {
         return mSkPath;
     }
 }

 void FullPath::updateProperties(float strokeWidth, SkColor strokeColor, float strokeAlpha,
         SkColor fillColor, float fillAlpha, float trimPathStart, float trimPathEnd,
         float trimPathOffset, float strokeMiterLimit, int strokeLineCap, int strokeLineJoin) {
     mStrokeWidth = strokeWidth;
     mStrokeColor = strokeColor;
     mStrokeAlpha = strokeAlpha;
     mFillColor = fillColor;
     mFillAlpha = fillAlpha;
     mStrokeMiterLimit = strokeMiterLimit;
     mStrokeLineCap = SkPaint::Cap(strokeLineCap);
     mStrokeLineJoin = SkPaint::Join(strokeLineJoin);

     // If any trim property changes, mark trim dirty and update the trim path
     setTrimPathStart(trimPathStart);
     setTrimPathEnd(trimPathEnd);
     setTrimPathOffset(trimPathOffset);
 }

 inline SkColor applyAlpha(SkColor color, float alpha) {
     int alphaBytes = SkColorGetA(color);
     return SkColorSetA(color, alphaBytes * alpha);
 }

 void FullPath::drawPath(Canvas* outCanvas, const SkPath& renderPath, float strokeScale){
     // Draw path's fill, if fill color isn't transparent.
     if (mFillColor != SK_ColorTRANSPARENT) {
         mPaint.setStyle(SkPaint::Style::kFill_Style);
         mPaint.setAntiAlias(true);
         mPaint.setColor(applyAlpha(mFillColor, mFillAlpha));
         outCanvas->drawPath(renderPath, mPaint);
     }
     // Draw path's stroke, if stroke color isn't transparent
     if (mStrokeColor != SK_ColorTRANSPARENT) {
         mPaint.setStyle(SkPaint::Style::kStroke_Style);
         mPaint.setAntiAlias(true);
         mPaint.setStrokeJoin(mStrokeLineJoin);
         mPaint.setStrokeCap(mStrokeLineCap);
         mPaint.setStrokeMiter(mStrokeMiterLimit);
         mPaint.setColor(applyAlpha(mStrokeColor, mStrokeAlpha));
         mPaint.setStrokeWidth(mStrokeWidth * strokeScale);
         outCanvas->drawPath(renderPath, mPaint);
     }
 }

 /**
  * Applies trimming to the specified path.
  */
 void FullPath::applyTrim() {
     if (mTrimPathStart == 0.0f && mTrimPathEnd == 1.0f) {
         // No trimming necessary.
         return;
     }
     SkPathMeasure measure(mSkPath, false);
     float len = SkScalarToFloat(measure.getLength());
     float start = len * fmod((mTrimPathStart + mTrimPathOffset), 1.0f);
     float end = len * fmod((mTrimPathEnd + mTrimPathOffset), 1.0f);

     mTrimmedSkPath.reset();
     if (start > end) {
         measure.getSegment(start, len, &mTrimmedSkPath, true);
         measure.getSegment(0, end, &mTrimmedSkPath, true);
     } else {
         measure.getSegment(start, end, &mTrimmedSkPath, true);
     }
     mTrimDirty = false;
 }

 inline int putData(int8_t* outBytes, int startIndex, float value) {
     int size = sizeof(float);
     memcpy(&outBytes[startIndex], &value, size);
     return size;
 }

 inline int putData(int8_t* outBytes, int startIndex, int value) {
     int size = sizeof(int);
     memcpy(&outBytes[startIndex], &value, size);
     return size;
 }

 struct FullPathProperties {
     // TODO: Consider storing full path properties in this struct instead of the fields.
     float strokeWidth;
     SkColor strokeColor;
     float strokeAlpha;
     SkColor fillColor;
     float fillAlpha;
     float trimPathStart;
     float trimPathEnd;
     float trimPathOffset;
     int32_t strokeLineCap;
     int32_t strokeLineJoin;
     float strokeMiterLimit;
 };

 REQUIRE_COMPATIBLE_LAYOUT(FullPathProperties);

 static_assert(sizeof(float) == sizeof(int32_t), "float is not the same size as int32_t");
 static_assert(sizeof(SkColor) == sizeof(int32_t), "SkColor is not the same size as int32_t");

 bool FullPath::getProperties(int8_t* outProperties, int length) {
     int propertyDataSize = sizeof(FullPathProperties);
     if (length != propertyDataSize) {
         LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
                 propertyDataSize, length);
         return false;
     }
     // TODO: consider replacing the property fields with a FullPathProperties struct.
     FullPathProperties properties;
     properties.strokeWidth = mStrokeWidth;
     properties.strokeColor = mStrokeColor;
     properties.strokeAlpha = mStrokeAlpha;
     properties.fillColor = mFillColor;
     properties.fillAlpha = mFillAlpha;
     properties.trimPathStart = mTrimPathStart;
     properties.trimPathEnd = mTrimPathEnd;
     properties.trimPathOffset = mTrimPathOffset;
     properties.strokeLineCap = mStrokeLineCap;
     properties.strokeLineJoin = mStrokeLineJoin;
     properties.strokeMiterLimit = mStrokeMiterLimit;

     memcpy(outProperties, &properties, length);
     return true;
 }

 void ClipPath::drawPath(Canvas* outCanvas, const SkPath& renderPath,
         float strokeScale){
     outCanvas->clipPath(&renderPath, SkRegion::kIntersect_Op);
 }

 Group::Group(const Group& group) : Node(group) {
     mRotate = group.mRotate;
     mPivotX = group.mPivotX;
     mPivotY = group.mPivotY;
     mScaleX = group.mScaleX;
     mScaleY = group.mScaleY;
     mTranslateX = group.mTranslateX;
     mTranslateY = group.mTranslateY;
 }

 void Group::draw(Canvas* outCanvas, const SkMatrix& currentMatrix, float scaleX,
         float scaleY) {
     // TODO: Try apply the matrix to the canvas instead of passing it down the tree

     // 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.
     SkMatrix stackedMatrix;
     getLocalMatrix(&stackedMatrix);
     stackedMatrix.postConcat(currentMatrix);

     // Save the current clip information, which is local to this group.
     outCanvas->save(SkCanvas::kMatrixClip_SaveFlag);
     // Draw the group tree in the same order as the XML file.
     for (Node* child : mChildren) {
         child->draw(outCanvas, stackedMatrix, scaleX, scaleY);
     }
     // Restore the previous clip information.
     outCanvas->restore();
 }

 void Group::dump() {
     ALOGD("Group %s has %zu children: ", mName.c_str(), mChildren.size());
     for (size_t i = 0; i < mChildren.size(); i++) {
         mChildren[i]->dump();
     }
 }

 void Group::updateLocalMatrix(float rotate, float pivotX, float pivotY,
         float scaleX, float scaleY, float translateX, float translateY) {
     setRotation(rotate);
     setPivotX(pivotX);
     setPivotY(pivotY);
     setScaleX(scaleX);
     setScaleY(scaleY);
     setTranslateX(translateX);
     setTranslateY(translateY);
 }

 void Group::getLocalMatrix(SkMatrix* outMatrix) {
     outMatrix->reset();
     // TODO: use rotate(mRotate, mPivotX, mPivotY) and scale with pivot point, instead of
     // translating to pivot for rotating and scaling, then translating back.
     outMatrix->postTranslate(-mPivotX, -mPivotY);
     outMatrix->postScale(mScaleX, mScaleY);
     outMatrix->postRotate(mRotate, 0, 0);
     outMatrix->postTranslate(mTranslateX + mPivotX, mTranslateY + mPivotY);
 }

 void Group::addChild(Node* child) {
     mChildren.push_back(child);
 }

 bool Group::getProperties(float* outProperties, int length) {
     int propertyCount = static_cast<int>(Property::Count);
     if (length != propertyCount) {
         LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
                 propertyCount, length);
         return false;
     }
     for (int i = 0; i < propertyCount; i++) {
         Property currentProperty = static_cast<Property>(i);
         switch (currentProperty) {
         case Property::Rotate_Property:
             outProperties[i] = mRotate;
             break;
         case Property::PivotX_Property:
             outProperties[i] = mPivotX;
             break;
         case Property::PivotY_Property:
             outProperties[i] = mPivotY;
             break;
         case Property::ScaleX_Property:
             outProperties[i] = mScaleX;
             break;
         case Property::ScaleY_Property:
             outProperties[i] = mScaleY;
             break;
         case Property::TranslateX_Property:
             outProperties[i] = mTranslateX;
             break;
         case Property::TranslateY_Property:
             outProperties[i] = mTranslateY;
             break;
         default:
             LOG_ALWAYS_FATAL("Invalid input index: %d", i);
             return false;
         }
     }
     return true;
 }

 void Tree::draw(Canvas* outCanvas, SkColorFilter* colorFilter,
         const SkRect& bounds, bool needsMirroring, bool canReuseCache) {
     // The imageView can scale the canvas in different ways, in order to
     // avoid blurry scaling, we have to draw into a bitmap with exact pixel
     // size first. This bitmap size is determined by the bounds and the
     // canvas scale.
     outCanvas->getMatrix(&mCanvasMatrix);
     mBounds = bounds;
     float canvasScaleX = 1.0f;
     float canvasScaleY = 1.0f;
     if (mCanvasMatrix.getSkewX() == 0 && mCanvasMatrix.getSkewY() == 0) {
         // Only use the scale value when there's no skew or rotation in the canvas matrix.
         canvasScaleX = mCanvasMatrix.getScaleX();
         canvasScaleY = mCanvasMatrix.getScaleY();
     }
     int scaledWidth = (int) (mBounds.width() * canvasScaleX);
     int scaledHeight = (int) (mBounds.height() * canvasScaleY);
     scaledWidth = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledWidth);
     scaledHeight = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledHeight);

     if (scaledWidth <= 0 || scaledHeight <= 0) {
         return;
     }

     int saveCount = outCanvas->save(SkCanvas::SaveFlags::kMatrixClip_SaveFlag);
     outCanvas->translate(mBounds.fLeft, mBounds.fTop);

     // Handle RTL mirroring.
     if (needsMirroring) {
         outCanvas->translate(mBounds.width(), 0);
         outCanvas->scale(-1.0f, 1.0f);
     }

     // At this point, canvas has been translated to the right position.
     // And we use this bound for the destination rect for the drawBitmap, so
     // we offset to (0, 0);
     mBounds.offsetTo(0, 0);

     createCachedBitmapIfNeeded(scaledWidth, scaledHeight);
     if (!mAllowCaching) {
         updateCachedBitmap(scaledWidth, scaledHeight);
     } else {
         if (!canReuseCache || mCacheDirty) {
             updateCachedBitmap(scaledWidth, scaledHeight);
         }
     }
     drawCachedBitmapWithRootAlpha(outCanvas, colorFilter, mBounds);

     outCanvas->restoreToCount(saveCount);
 }

 void Tree::drawCachedBitmapWithRootAlpha(Canvas* outCanvas, SkColorFilter* filter,
         const SkRect& originalBounds) {
     SkPaint* paint;
     if (mRootAlpha == 1.0f && filter == NULL) {
         paint = NULL;
     } else {
         mPaint.setFilterQuality(kLow_SkFilterQuality);
         mPaint.setAlpha(mRootAlpha * 255);
         mPaint.setColorFilter(filter);
         paint = &mPaint;
     }
     outCanvas->drawBitmap(mCachedBitmap, 0, 0, mCachedBitmap.width(), mCachedBitmap.height(),
             originalBounds.fLeft, originalBounds.fTop, originalBounds.fRight,
             originalBounds.fBottom, paint);
 }

 void Tree::updateCachedBitmap(int width, int height) {
     mCachedBitmap.eraseColor(SK_ColorTRANSPARENT);
     Canvas* outCanvas = Canvas::create_canvas(mCachedBitmap);
     float scaleX = width / mViewportWidth;
     float scaleY = height / mViewportHeight;
     mRootNode->draw(outCanvas, SkMatrix::I(), scaleX, scaleY);
     mCacheDirty = false;
 }

 void Tree::createCachedBitmapIfNeeded(int width, int height) {
     if (!canReuseBitmap(width, height)) {
         SkImageInfo info = SkImageInfo::Make(width, height,
                 kN32_SkColorType, kPremul_SkAlphaType);
         mCachedBitmap.setInfo(info);
         // TODO: Count the bitmap cache against app's java heap
         mCachedBitmap.allocPixels(info);
         mCacheDirty = true;
     }
 }

 bool Tree::canReuseBitmap(int width, int height) {
     return width == mCachedBitmap.width() && height == mCachedBitmap.height();
 }

 }; // namespace VectorDrawable

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "VectorDrawable.h"

	#include "PathParser.h"
	#include "SkImageInfo.h"
	#include <utils/Log.h>
	#include "utils/Macros.h"
	#include "utils/VectorDrawableUtils.h"

	#include <math.h>
	#include <string.h>

	namespace android {
	namespace uirenderer {
	namespace VectorDrawable {

	const int Tree::MAX_CACHED_BITMAP_SIZE = 2048;

	void Path::draw(Canvas* outCanvas, const SkMatrix& groupStackedMatrix, float scaleX, float scaleY) {
	float matrixScale = getMatrixScale(groupStackedMatrix);
	if (matrixScale == 0) {
	// When either x or y is scaled to 0, we don't need to draw anything.
	return;
	}

	const SkPath updatedPath = getUpdatedPath();
	SkMatrix pathMatrix(groupStackedMatrix);
	pathMatrix.postScale(scaleX, scaleY);

	//TODO: try apply the path matrix to the canvas instead of creating a new path.
	SkPath renderPath;
	renderPath.reset();
	renderPath.addPath(updatedPath, pathMatrix);

	float minScale = fmin(scaleX, scaleY);
	float strokeScale = minScale * matrixScale;
	drawPath(outCanvas, renderPath, strokeScale);
	}

	void Path::setPathData(const Data& data) {
	if (mData == data) {
	return;
	}
	// Updates the path data. Note that we don't generate a new Skia path right away
	// because there are cases where the animation is changing the path data, but the view
	// that hosts the VD has gone off screen, in which case we won't even draw. So we
	// postpone the Skia path generation to the draw time.
	mData = data;
	mSkPathDirty = true;
	}

	void Path::dump() {
	ALOGD("Path: %s has %zu points", mName.c_str(), mData.points.size());
	}

	float Path::getMatrixScale(const SkMatrix& groupStackedMatrix) {
	// Given unit vectors A = (0, 1) and B = (1, 0).
	// After matrix mapping, we got A' and B'. Let theta = the angel b/t A' and B'.
	// Therefore, the final scale we want is min(\|A'\| * sin(theta), \|B'\| * sin(theta)),
	// which is (\|A'\| * \|B'\| * sin(theta)) / max (\|A'\|, \|B'\|);
	// If max (\|A'\|, \|B'\|) = 0, that means either x or y has a scale of 0.
	//
	// For non-skew case, which is most of the cases, matrix scale is computing exactly the
	// scale on x and y axis, and take the minimal of these two.
	// For skew case, an unit square will mapped to a parallelogram. And this function will
	// return the minimal height of the 2 bases.
	SkVector skVectors[2];
	skVectors[0].set(0, 1);
	skVectors[1].set(1, 0);
	groupStackedMatrix.mapVectors(skVectors, 2);
	float scaleX = hypotf(skVectors[0].fX, skVectors[0].fY);
	float scaleY = hypotf(skVectors[1].fX, skVectors[1].fY);
	float crossProduct = skVectors[0].cross(skVectors[1]);
	float maxScale = fmax(scaleX, scaleY);

	float matrixScale = 0;
	if (maxScale > 0) {
	matrixScale = fabs(crossProduct) / maxScale;
	}
	return matrixScale;
	}
	Path::Path(const char* pathStr, size_t strLength) {
	PathParser::ParseResult result;
	PathParser::getPathDataFromString(&mData, &result, pathStr, strLength);
	if (!result.failureOccurred) {
	VectorDrawableUtils::verbsToPath(&mSkPath, mData);
	}
	}

	Path::Path(const Data& data) {
	mData = data;
	// Now we need to construct a path
	VectorDrawableUtils::verbsToPath(&mSkPath, data);
	}

	Path::Path(const Path& path) : Node(path) {
	mData = path.mData;
	VectorDrawableUtils::verbsToPath(&mSkPath, mData);
	}

	bool Path::canMorph(const Data& morphTo) {
	return VectorDrawableUtils::canMorph(mData, morphTo);
	}

	bool Path::canMorph(const Path& path) {
	return canMorph(path.mData);
	}

	const SkPath& Path::getUpdatedPath() {
	if (mSkPathDirty) {
	mSkPath.reset();
	VectorDrawableUtils::verbsToPath(&mSkPath, mData);
	mSkPathDirty = false;
	}
	return mSkPath;
	}

	void Path::setPath(const char* pathStr, size_t strLength) {
	PathParser::ParseResult result;
	mSkPathDirty = true;
	PathParser::getPathDataFromString(&mData, &result, pathStr, strLength);
	}

	FullPath::FullPath(const FullPath& path) : Path(path) {
	mStrokeWidth = path.mStrokeWidth;
	mStrokeColor = path.mStrokeColor;
	mStrokeAlpha = path.mStrokeAlpha;
	mFillColor = path.mFillColor;
	mFillAlpha = path.mFillAlpha;
	mTrimPathStart = path.mTrimPathStart;
	mTrimPathEnd = path.mTrimPathEnd;
	mTrimPathOffset = path.mTrimPathOffset;
	mStrokeMiterLimit = path.mStrokeMiterLimit;
	mStrokeLineCap = path.mStrokeLineCap;
	mStrokeLineJoin = path.mStrokeLineJoin;
	}

	const SkPath& FullPath::getUpdatedPath() {
	if (!mSkPathDirty && !mTrimDirty) {
	return mTrimmedSkPath;
	}
	Path::getUpdatedPath();
	if (mTrimPathStart != 0.0f \|\| mTrimPathEnd != 1.0f) {
	applyTrim();
	return mTrimmedSkPath;
	} else {
	return mSkPath;
	}
	}

	void FullPath::updateProperties(float strokeWidth, SkColor strokeColor, float strokeAlpha,
	SkColor fillColor, float fillAlpha, float trimPathStart, float trimPathEnd,
	float trimPathOffset, float strokeMiterLimit, int strokeLineCap, int strokeLineJoin) {
	mStrokeWidth = strokeWidth;
	mStrokeColor = strokeColor;
	mStrokeAlpha = strokeAlpha;
	mFillColor = fillColor;
	mFillAlpha = fillAlpha;
	mStrokeMiterLimit = strokeMiterLimit;
	mStrokeLineCap = SkPaint::Cap(strokeLineCap);
	mStrokeLineJoin = SkPaint::Join(strokeLineJoin);

	// If any trim property changes, mark trim dirty and update the trim path
	setTrimPathStart(trimPathStart);
	setTrimPathEnd(trimPathEnd);
	setTrimPathOffset(trimPathOffset);
	}

	inline SkColor applyAlpha(SkColor color, float alpha) {
	int alphaBytes = SkColorGetA(color);
	return SkColorSetA(color, alphaBytes * alpha);
	}

	void FullPath::drawPath(Canvas* outCanvas, const SkPath& renderPath, float strokeScale){
	// Draw path's fill, if fill color isn't transparent.
	if (mFillColor != SK_ColorTRANSPARENT) {
	mPaint.setStyle(SkPaint::Style::kFill_Style);
	mPaint.setAntiAlias(true);
	mPaint.setColor(applyAlpha(mFillColor, mFillAlpha));
	outCanvas->drawPath(renderPath, mPaint);
	}
	// Draw path's stroke, if stroke color isn't transparent
	if (mStrokeColor != SK_ColorTRANSPARENT) {
	mPaint.setStyle(SkPaint::Style::kStroke_Style);
	mPaint.setAntiAlias(true);
	mPaint.setStrokeJoin(mStrokeLineJoin);
	mPaint.setStrokeCap(mStrokeLineCap);
	mPaint.setStrokeMiter(mStrokeMiterLimit);
	mPaint.setColor(applyAlpha(mStrokeColor, mStrokeAlpha));
	mPaint.setStrokeWidth(mStrokeWidth * strokeScale);
	outCanvas->drawPath(renderPath, mPaint);
	}
	}

	/**
	* Applies trimming to the specified path.
	*/
	void FullPath::applyTrim() {
	if (mTrimPathStart == 0.0f && mTrimPathEnd == 1.0f) {
	// No trimming necessary.
	return;
	}
	SkPathMeasure measure(mSkPath, false);
	float len = SkScalarToFloat(measure.getLength());
	float start = len * fmod((mTrimPathStart + mTrimPathOffset), 1.0f);
	float end = len * fmod((mTrimPathEnd + mTrimPathOffset), 1.0f);

	mTrimmedSkPath.reset();
	if (start > end) {
	measure.getSegment(start, len, &mTrimmedSkPath, true);
	measure.getSegment(0, end, &mTrimmedSkPath, true);
	} else {
	measure.getSegment(start, end, &mTrimmedSkPath, true);
	}
	mTrimDirty = false;
	}

	inline int putData(int8_t* outBytes, int startIndex, float value) {
	int size = sizeof(float);
	memcpy(&outBytes[startIndex], &value, size);
	return size;
	}

	inline int putData(int8_t* outBytes, int startIndex, int value) {
	int size = sizeof(int);
	memcpy(&outBytes[startIndex], &value, size);
	return size;
	}

	struct FullPathProperties {
	// TODO: Consider storing full path properties in this struct instead of the fields.
	float strokeWidth;
	SkColor strokeColor;
	float strokeAlpha;
	SkColor fillColor;
	float fillAlpha;
	float trimPathStart;
	float trimPathEnd;
	float trimPathOffset;
	int32_t strokeLineCap;
	int32_t strokeLineJoin;
	float strokeMiterLimit;
	};

	REQUIRE_COMPATIBLE_LAYOUT(FullPathProperties);

	static_assert(sizeof(float) == sizeof(int32_t), "float is not the same size as int32_t");
	static_assert(sizeof(SkColor) == sizeof(int32_t), "SkColor is not the same size as int32_t");

	bool FullPath::getProperties(int8_t* outProperties, int length) {
	int propertyDataSize = sizeof(FullPathProperties);
	if (length != propertyDataSize) {
	LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
	propertyDataSize, length);
	return false;
	}
	// TODO: consider replacing the property fields with a FullPathProperties struct.
	FullPathProperties properties;
	properties.strokeWidth = mStrokeWidth;
	properties.strokeColor = mStrokeColor;
	properties.strokeAlpha = mStrokeAlpha;
	properties.fillColor = mFillColor;
	properties.fillAlpha = mFillAlpha;
	properties.trimPathStart = mTrimPathStart;
	properties.trimPathEnd = mTrimPathEnd;
	properties.trimPathOffset = mTrimPathOffset;
	properties.strokeLineCap = mStrokeLineCap;
	properties.strokeLineJoin = mStrokeLineJoin;
	properties.strokeMiterLimit = mStrokeMiterLimit;

	memcpy(outProperties, &properties, length);
	return true;
	}

	void ClipPath::drawPath(Canvas* outCanvas, const SkPath& renderPath,
	float strokeScale){
	outCanvas->clipPath(&renderPath, SkRegion::kIntersect_Op);
	}

	Group::Group(const Group& group) : Node(group) {
	mRotate = group.mRotate;
	mPivotX = group.mPivotX;
	mPivotY = group.mPivotY;
	mScaleX = group.mScaleX;
	mScaleY = group.mScaleY;
	mTranslateX = group.mTranslateX;
	mTranslateY = group.mTranslateY;
	}

	void Group::draw(Canvas* outCanvas, const SkMatrix& currentMatrix, float scaleX,
	float scaleY) {
	// TODO: Try apply the matrix to the canvas instead of passing it down the tree

	// 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.
	SkMatrix stackedMatrix;
	getLocalMatrix(&stackedMatrix);
	stackedMatrix.postConcat(currentMatrix);

	// Save the current clip information, which is local to this group.
	outCanvas->save(SkCanvas::kMatrixClip_SaveFlag);
	// Draw the group tree in the same order as the XML file.
	for (Node* child : mChildren) {
	child->draw(outCanvas, stackedMatrix, scaleX, scaleY);
	}
	// Restore the previous clip information.
	outCanvas->restore();
	}

	void Group::dump() {
	ALOGD("Group %s has %zu children: ", mName.c_str(), mChildren.size());
	for (size_t i = 0; i < mChildren.size(); i++) {
	mChildren[i]->dump();
	}
	}

	void Group::updateLocalMatrix(float rotate, float pivotX, float pivotY,
	float scaleX, float scaleY, float translateX, float translateY) {
	setRotation(rotate);
	setPivotX(pivotX);
	setPivotY(pivotY);
	setScaleX(scaleX);
	setScaleY(scaleY);
	setTranslateX(translateX);
	setTranslateY(translateY);
	}

	void Group::getLocalMatrix(SkMatrix* outMatrix) {
	outMatrix->reset();
	// TODO: use rotate(mRotate, mPivotX, mPivotY) and scale with pivot point, instead of
	// translating to pivot for rotating and scaling, then translating back.
	outMatrix->postTranslate(-mPivotX, -mPivotY);
	outMatrix->postScale(mScaleX, mScaleY);
	outMatrix->postRotate(mRotate, 0, 0);
	outMatrix->postTranslate(mTranslateX + mPivotX, mTranslateY + mPivotY);
	}

	void Group::addChild(Node* child) {
	mChildren.push_back(child);
	}

	bool Group::getProperties(float* outProperties, int length) {
	int propertyCount = static_cast<int>(Property::Count);
	if (length != propertyCount) {
	LOG_ALWAYS_FATAL("Properties needs exactly %d bytes, a byte array of size %d is provided",
	propertyCount, length);
	return false;
	}
	for (int i = 0; i < propertyCount; i++) {
	Property currentProperty = static_cast<Property>(i);
	switch (currentProperty) {
	case Property::Rotate_Property:
	outProperties[i] = mRotate;
	break;
	case Property::PivotX_Property:
	outProperties[i] = mPivotX;
	break;
	case Property::PivotY_Property:
	outProperties[i] = mPivotY;
	break;
	case Property::ScaleX_Property:
	outProperties[i] = mScaleX;
	break;
	case Property::ScaleY_Property:
	outProperties[i] = mScaleY;
	break;
	case Property::TranslateX_Property:
	outProperties[i] = mTranslateX;
	break;
	case Property::TranslateY_Property:
	outProperties[i] = mTranslateY;
	break;
	default:
	LOG_ALWAYS_FATAL("Invalid input index: %d", i);
	return false;
	}
	}
	return true;
	}

	void Tree::draw(Canvas* outCanvas, SkColorFilter* colorFilter,
	const SkRect& bounds, bool needsMirroring, bool canReuseCache) {
	// The imageView can scale the canvas in different ways, in order to
	// avoid blurry scaling, we have to draw into a bitmap with exact pixel
	// size first. This bitmap size is determined by the bounds and the
	// canvas scale.
	outCanvas->getMatrix(&mCanvasMatrix);
	mBounds = bounds;
	float canvasScaleX = 1.0f;
	float canvasScaleY = 1.0f;
	if (mCanvasMatrix.getSkewX() == 0 && mCanvasMatrix.getSkewY() == 0) {
	// Only use the scale value when there's no skew or rotation in the canvas matrix.
	canvasScaleX = mCanvasMatrix.getScaleX();
	canvasScaleY = mCanvasMatrix.getScaleY();
	}
	int scaledWidth = (int) (mBounds.width() * canvasScaleX);
	int scaledHeight = (int) (mBounds.height() * canvasScaleY);
	scaledWidth = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledWidth);
	scaledHeight = std::min(Tree::MAX_CACHED_BITMAP_SIZE, scaledHeight);

	if (scaledWidth <= 0 \|\| scaledHeight <= 0) {
	return;
	}

	int saveCount = outCanvas->save(SkCanvas::SaveFlags::kMatrixClip_SaveFlag);
	outCanvas->translate(mBounds.fLeft, mBounds.fTop);

	// Handle RTL mirroring.
	if (needsMirroring) {
	outCanvas->translate(mBounds.width(), 0);
	outCanvas->scale(-1.0f, 1.0f);
	}

	// At this point, canvas has been translated to the right position.
	// And we use this bound for the destination rect for the drawBitmap, so
	// we offset to (0, 0);
	mBounds.offsetTo(0, 0);

	createCachedBitmapIfNeeded(scaledWidth, scaledHeight);
	if (!mAllowCaching) {
	updateCachedBitmap(scaledWidth, scaledHeight);
	} else {
	if (!canReuseCache \|\| mCacheDirty) {
	updateCachedBitmap(scaledWidth, scaledHeight);
	}
	}
	drawCachedBitmapWithRootAlpha(outCanvas, colorFilter, mBounds);

	outCanvas->restoreToCount(saveCount);
	}

	void Tree::drawCachedBitmapWithRootAlpha(Canvas* outCanvas, SkColorFilter* filter,
	const SkRect& originalBounds) {
	SkPaint* paint;
	if (mRootAlpha == 1.0f && filter == NULL) {
	paint = NULL;
	} else {
	mPaint.setFilterQuality(kLow_SkFilterQuality);
	mPaint.setAlpha(mRootAlpha * 255);
	mPaint.setColorFilter(filter);
	paint = &mPaint;
	}
	outCanvas->drawBitmap(mCachedBitmap, 0, 0, mCachedBitmap.width(), mCachedBitmap.height(),
	originalBounds.fLeft, originalBounds.fTop, originalBounds.fRight,
	originalBounds.fBottom, paint);
	}

	void Tree::updateCachedBitmap(int width, int height) {
	mCachedBitmap.eraseColor(SK_ColorTRANSPARENT);
	Canvas* outCanvas = Canvas::create_canvas(mCachedBitmap);
	float scaleX = width / mViewportWidth;
	float scaleY = height / mViewportHeight;
	mRootNode->draw(outCanvas, SkMatrix::I(), scaleX, scaleY);
	mCacheDirty = false;
	}

	void Tree::createCachedBitmapIfNeeded(int width, int height) {
	if (!canReuseBitmap(width, height)) {
	SkImageInfo info = SkImageInfo::Make(width, height,
	kN32_SkColorType, kPremul_SkAlphaType);
	mCachedBitmap.setInfo(info);
	// TODO: Count the bitmap cache against app's java heap
	mCachedBitmap.allocPixels(info);
	mCacheDirty = true;
	}
	}

	bool Tree::canReuseBitmap(int width, int height) {
	return width == mCachedBitmap.width() && height == mCachedBitmap.height();
	}

	}; // namespace VectorDrawable

	}; // namespace uirenderer
	}; // namespace android