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/*
* 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.
*/
#ifndef ANDROID_HWUI_VPATH_H
#define ANDROID_HWUI_VPATH_H
#include "hwui/Canvas.h"
#include "DisplayList.h"
#include <SkBitmap.h>
#include <SkColor.h>
#include <SkColorFilter.h>
#include <SkCanvas.h>
#include <SkMatrix.h>
#include <SkPaint.h>
#include <SkPath.h>
#include <SkPathMeasure.h>
#include <SkRect.h>
#include <SkShader.h>
#include <cutils/compiler.h>
#include <stddef.h>
#include <vector>
#include <string>
namespace android {
namespace uirenderer {
namespace VectorDrawable {
#define VD_SET_PRIMITIVE_FIELD_WITH_FLAG(field, value, flag) (VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(field, (value)) ? ((flag) = true, true) : false)
#define VD_SET_PROP(field, value) ((value) != (field) ? ((field) = (value), true) : false)
#define VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(field, value) ({ bool retVal = VD_SET_PROP((mPrimitiveFields.field), (value));\
onPropertyChanged(); retVal;})
#define UPDATE_SKPROP(field, value) ({bool retVal = ((field) != (value)); if ((field) != (value)) SkRefCnt_SafeAssign((field), (value)); retVal;})
/* A VectorDrawable is composed of a tree of nodes.
* 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
*
* VectorDrawables are drawn into bitmap caches first, then the caches are drawn to the given
* canvas with root alpha applied. Two caches are maintained for VD, one in UI thread, the other in
* Render Thread. A generation id is used to keep track of changes in the vector drawable tree.
* Each cache has their own generation id to track whether they are up to date with the latest
* change in the tree.
*
* Any property change to the vector drawable coming from UI thread (such as bulk setters to update
* all the properties, and viewport change, etc.) are only modifying the staging properties. The
* staging properties will then be marked dirty and will be pushed over to render thread properties
* at sync point. If staging properties are not dirty at sync point, we sync backwards by updating
* staging properties with render thread properties to reflect the latest animation value.
*
*/
class PropertyChangedListener {
public:
PropertyChangedListener(bool* dirty, bool* stagingDirty)
: mDirty(dirty), mStagingDirty(stagingDirty) {}
void onPropertyChanged() {
*mDirty = true;
}
void onStagingPropertyChanged() {
*mStagingDirty = true;
}
private:
bool* mDirty;
bool* mStagingDirty;
};
class ANDROID_API Node {
public:
class Properties {
public:
Properties(Node* node) : mNode(node) {}
inline void onPropertyChanged() {
mNode->onPropertyChanged(this);
}
private:
Node* mNode;
};
Node(const Node& node) {
mName = node.mName;
}
Node() {}
virtual void draw(SkCanvas* outCanvas, const SkMatrix& currentMatrix,
float scaleX, float scaleY, bool useStagingData) = 0;
virtual void dump() = 0;
void setName(const char* name) {
mName = name;
}
virtual void setPropertyChangedListener(PropertyChangedListener* listener) {
mPropertyChangedListener = listener;
}
virtual void onPropertyChanged(Properties* properties) = 0;
virtual ~Node(){}
virtual void syncProperties() = 0;
protected:
std::string mName;
PropertyChangedListener* mPropertyChangedListener = nullptr;
};
class ANDROID_API Path : public Node {
public:
struct ANDROID_API Data {
std::vector<char> verbs;
std::vector<size_t> verbSizes;
std::vector<float> points;
bool operator==(const Data& data) const {
return verbs == data.verbs && verbSizes == data.verbSizes
&& points == data.points;
}
};
class PathProperties : public Properties {
public:
PathProperties(Node* node) : Properties(node) {}
void syncProperties(const PathProperties& prop) {
mData = prop.mData;
onPropertyChanged();
}
void setData(const Data& data) {
// 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.
if (data == mData) {
return;
}
mData = data;
onPropertyChanged();
}
const Data& getData() const {
return mData;
}
private:
Data mData;
};
Path(const Path& path);
Path(const char* path, size_t strLength);
Path() {}
void dump() override;
void draw(SkCanvas* outCanvas, const SkMatrix& groupStackedMatrix,
float scaleX, float scaleY, bool useStagingData) override;
static float getMatrixScale(const SkMatrix& groupStackedMatrix);
virtual void syncProperties() override;
virtual void onPropertyChanged(Properties* prop) override {
if (prop == &mStagingProperties) {
mStagingPropertiesDirty = true;
if (mPropertyChangedListener) {
mPropertyChangedListener->onStagingPropertyChanged();
}
} else if (prop == &mProperties){
mSkPathDirty = true;
if (mPropertyChangedListener) {
mPropertyChangedListener->onPropertyChanged();
}
}
}
PathProperties* mutateStagingProperties() { return &mStagingProperties; }
const PathProperties* stagingProperties() { return &mStagingProperties; }
// This should only be called from animations on RT
PathProperties* mutateProperties() { return &mProperties; }
protected:
virtual const SkPath& getUpdatedPath();
virtual void getStagingPath(SkPath* outPath);
virtual void drawPath(SkCanvas *outCanvas, SkPath& renderPath,
float strokeScale, const SkMatrix& matrix, bool useStagingData) = 0;
// Internal data, render thread only.
bool mSkPathDirty = true;
SkPath mSkPath;
private:
PathProperties mProperties = PathProperties(this);
PathProperties mStagingProperties = PathProperties(this);
bool mStagingPropertiesDirty = true;
};
class ANDROID_API FullPath: public Path {
public:
class FullPathProperties : public Properties {
public:
struct PrimitiveFields {
float strokeWidth = 0;
SkColor strokeColor = SK_ColorTRANSPARENT;
float strokeAlpha = 1;
SkColor fillColor = SK_ColorTRANSPARENT;
float fillAlpha = 1;
float trimPathStart = 0;
float trimPathEnd = 1;
float trimPathOffset = 0;
int32_t strokeLineCap = SkPaint::Cap::kButt_Cap;
int32_t strokeLineJoin = SkPaint::Join::kMiter_Join;
float strokeMiterLimit = 4;
int fillType = 0; /* non-zero or kWinding_FillType in Skia */
};
FullPathProperties(Node* mNode) : Properties(mNode), mTrimDirty(false) {}
~FullPathProperties() {
SkSafeUnref(fillGradient);
SkSafeUnref(strokeGradient);
}
void syncProperties(const FullPathProperties& prop) {
mPrimitiveFields = prop.mPrimitiveFields;
mTrimDirty = true;
UPDATE_SKPROP(fillGradient, prop.fillGradient);
UPDATE_SKPROP(strokeGradient, prop.strokeGradient);
onPropertyChanged();
}
void setFillGradient(SkShader* gradient) {
if(UPDATE_SKPROP(fillGradient, gradient)) {
onPropertyChanged();
}
}
void setStrokeGradient(SkShader* gradient) {
if(UPDATE_SKPROP(strokeGradient, gradient)) {
onPropertyChanged();
}
}
SkShader* getFillGradient() const {
return fillGradient;
}
SkShader* getStrokeGradient() const {
return strokeGradient;
}
float getStrokeWidth() const{
return mPrimitiveFields.strokeWidth;
}
void setStrokeWidth(float strokeWidth) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(strokeWidth, strokeWidth);
}
SkColor getStrokeColor() const{
return mPrimitiveFields.strokeColor;
}
void setStrokeColor(SkColor strokeColor) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(strokeColor, strokeColor);
}
float getStrokeAlpha() const{
return mPrimitiveFields.strokeAlpha;
}
void setStrokeAlpha(float strokeAlpha) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(strokeAlpha, strokeAlpha);
}
SkColor getFillColor() const {
return mPrimitiveFields.fillColor;
}
void setFillColor(SkColor fillColor) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(fillColor, fillColor);
}
float getFillAlpha() const{
return mPrimitiveFields.fillAlpha;
}
void setFillAlpha(float fillAlpha) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(fillAlpha, fillAlpha);
}
float getTrimPathStart() const{
return mPrimitiveFields.trimPathStart;
}
void setTrimPathStart(float trimPathStart) {
VD_SET_PRIMITIVE_FIELD_WITH_FLAG(trimPathStart, trimPathStart, mTrimDirty);
}
float getTrimPathEnd() const{
return mPrimitiveFields.trimPathEnd;
}
void setTrimPathEnd(float trimPathEnd) {
VD_SET_PRIMITIVE_FIELD_WITH_FLAG(trimPathEnd, trimPathEnd, mTrimDirty);
}
float getTrimPathOffset() const{
return mPrimitiveFields.trimPathOffset;
}
void setTrimPathOffset(float trimPathOffset) {
VD_SET_PRIMITIVE_FIELD_WITH_FLAG(trimPathOffset, trimPathOffset, mTrimDirty);
}
float getStrokeMiterLimit() const {
return mPrimitiveFields.strokeMiterLimit;
}
float getStrokeLineCap() const {
return mPrimitiveFields.strokeLineCap;
}
float getStrokeLineJoin() const {
return mPrimitiveFields.strokeLineJoin;
}
float getFillType() const {
return mPrimitiveFields.fillType;
}
bool copyProperties(int8_t* outProperties, int length) const;
void updateProperties(float strokeWidth, SkColor strokeColor, float strokeAlpha,
SkColor fillColor, float fillAlpha, float trimPathStart, float trimPathEnd,
float trimPathOffset, float strokeMiterLimit, int strokeLineCap, int strokeLineJoin,
int fillType) {
mPrimitiveFields.strokeWidth = strokeWidth;
mPrimitiveFields.strokeColor = strokeColor;
mPrimitiveFields.strokeAlpha = strokeAlpha;
mPrimitiveFields.fillColor = fillColor;
mPrimitiveFields.fillAlpha = fillAlpha;
mPrimitiveFields.trimPathStart = trimPathStart;
mPrimitiveFields.trimPathEnd = trimPathEnd;
mPrimitiveFields.trimPathOffset = trimPathOffset;
mPrimitiveFields.strokeMiterLimit = strokeMiterLimit;
mPrimitiveFields.strokeLineCap = strokeLineCap;
mPrimitiveFields.strokeLineJoin = strokeLineJoin;
mPrimitiveFields.fillType = fillType;
mTrimDirty = true;
onPropertyChanged();
}
// Set property values during animation
void setColorPropertyValue(int propertyId, int32_t value);
void setPropertyValue(int propertyId, float value);
bool mTrimDirty;
private:
enum class Property {
strokeWidth = 0,
strokeColor,
strokeAlpha,
fillColor,
fillAlpha,
trimPathStart,
trimPathEnd,
trimPathOffset,
strokeLineCap,
strokeLineJoin,
strokeMiterLimit,
fillType,
count,
};
PrimitiveFields mPrimitiveFields;
SkShader* fillGradient = nullptr;
SkShader* strokeGradient = nullptr;
};
// Called from UI thread
FullPath(const FullPath& path); // for cloning
FullPath(const char* path, size_t strLength) : Path(path, strLength) {}
FullPath() : Path() {}
void dump() override;
FullPathProperties* mutateStagingProperties() { return &mStagingProperties; }
const FullPathProperties* stagingProperties() { return &mStagingProperties; }
// This should only be called from animations on RT
FullPathProperties* mutateProperties() { return &mProperties; }
virtual void syncProperties() override;
virtual void onPropertyChanged(Properties* properties) override {
Path::onPropertyChanged(properties);
if (properties == &mStagingProperties) {
mStagingPropertiesDirty = true;
if (mPropertyChangedListener) {
mPropertyChangedListener->onStagingPropertyChanged();
}
} else if (properties == &mProperties) {
if (mPropertyChangedListener) {
mPropertyChangedListener->onPropertyChanged();
}
}
}
protected:
const SkPath& getUpdatedPath() override;
void getStagingPath(SkPath* outPath) override;
void drawPath(SkCanvas* outCanvas, SkPath& renderPath,
float strokeScale, const SkMatrix& matrix, bool useStagingData) override;
private:
FullPathProperties mProperties = FullPathProperties(this);
FullPathProperties mStagingProperties = FullPathProperties(this);
bool mStagingPropertiesDirty = true;
// Intermediate data for drawing, render thread only
SkPath mTrimmedSkPath;
};
class ANDROID_API ClipPath: public Path {
public:
ClipPath(const ClipPath& path) : Path(path) {}
ClipPath(const char* path, size_t strLength) : Path(path, strLength) {}
ClipPath() : Path() {}
protected:
void drawPath(SkCanvas* outCanvas, SkPath& renderPath,
float strokeScale, const SkMatrix& matrix, bool useStagingData) override;
};
class ANDROID_API Group: public Node {
public:
class GroupProperties : public Properties {
public:
GroupProperties(Node* mNode) : Properties(mNode) {}
struct PrimitiveFields {
float rotate = 0;
float pivotX = 0;
float pivotY = 0;
float scaleX = 1;
float scaleY = 1;
float translateX = 0;
float translateY = 0;
} mPrimitiveFields;
void syncProperties(const GroupProperties& prop) {
mPrimitiveFields = prop.mPrimitiveFields;
onPropertyChanged();
}
float getRotation() const {
return mPrimitiveFields.rotate;
}
void setRotation(float rotation) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(rotate, rotation);
}
float getPivotX() const {
return mPrimitiveFields.pivotX;
}
void setPivotX(float pivotX) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(pivotX, pivotX);
}
float getPivotY() const {
return mPrimitiveFields.pivotY;
}
void setPivotY(float pivotY) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(pivotY, pivotY);
}
float getScaleX() const {
return mPrimitiveFields.scaleX;
}
void setScaleX(float scaleX) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(scaleX, scaleX);
}
float getScaleY() const {
return mPrimitiveFields.scaleY;
}
void setScaleY(float scaleY) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(scaleY, scaleY);
}
float getTranslateX() const {
return mPrimitiveFields.translateX;
}
void setTranslateX(float translateX) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(translateX, translateX);
}
float getTranslateY() const {
return mPrimitiveFields.translateY;
}
void setTranslateY(float translateY) {
VD_SET_PRIMITIVE_FIELD_AND_NOTIFY(translateY, translateY);
}
void updateProperties(float rotate, float pivotX, float pivotY,
float scaleX, float scaleY, float translateX, float translateY) {
mPrimitiveFields.rotate = rotate;
mPrimitiveFields.pivotX = pivotX;
mPrimitiveFields.pivotY = pivotY;
mPrimitiveFields.scaleX = scaleX;
mPrimitiveFields.scaleY = scaleY;
mPrimitiveFields.translateX = translateX;
mPrimitiveFields.translateY = translateY;
onPropertyChanged();
}
void setPropertyValue(int propertyId, float value);
float getPropertyValue(int propertyId) const;
bool copyProperties(float* outProperties, int length) const;
static bool isValidProperty(int propertyId);
private:
enum class Property {
rotate = 0,
pivotX,
pivotY,
scaleX,
scaleY,
translateX,
translateY,
// Count of the properties, must be at the end.
count,
};
};
Group(const Group& group);
Group() {}
void addChild(Node* child);
virtual void setPropertyChangedListener(PropertyChangedListener* listener) override {
Node::setPropertyChangedListener(listener);
for (auto& child : mChildren) {
child->setPropertyChangedListener(listener);
}
}
virtual void syncProperties() override;
GroupProperties* mutateStagingProperties() { return &mStagingProperties; }
const GroupProperties* stagingProperties() { return &mStagingProperties; }
// This should only be called from animations on RT
GroupProperties* mutateProperties() { return &mProperties; }
// Methods below could be called from either UI thread or Render Thread.
virtual void draw(SkCanvas* outCanvas, const SkMatrix& currentMatrix,
float scaleX, float scaleY, bool useStagingData) override;
void getLocalMatrix(SkMatrix* outMatrix, const GroupProperties& properties);
void dump() override;
static bool isValidProperty(int propertyId);
virtual void onPropertyChanged(Properties* properties) override {
if (properties == &mStagingProperties) {
mStagingPropertiesDirty = true;
if (mPropertyChangedListener) {
mPropertyChangedListener->onStagingPropertyChanged();
}
} else {
if (mPropertyChangedListener) {
mPropertyChangedListener->onPropertyChanged();
}
}
}
private:
GroupProperties mProperties = GroupProperties(this);
GroupProperties mStagingProperties = GroupProperties(this);
bool mStagingPropertiesDirty = true;
std::vector< std::unique_ptr<Node> > mChildren;
};
class ANDROID_API Tree : public VirtualLightRefBase {
public:
Tree(Group* rootNode) : mRootNode(rootNode) {
mRootNode->setPropertyChangedListener(&mPropertyChangedListener);
}
// Draws the VD onto a bitmap cache, then the bitmap cache will be rendered onto the input
// canvas. Returns the number of pixels needed for the bitmap cache.
int draw(Canvas* outCanvas, SkColorFilter* colorFilter,
const SkRect& bounds, bool needsMirroring, bool canReuseCache);
void drawStaging(Canvas* canvas);
const SkBitmap& getBitmapUpdateIfDirty();
void setAllowCaching(bool allowCaching) {
mAllowCaching = allowCaching;
}
SkPaint* getPaint();
void syncProperties() {
if (mStagingProperties.mNonAnimatablePropertiesDirty) {
mProperties.syncNonAnimatableProperties(mStagingProperties);
mStagingProperties.mNonAnimatablePropertiesDirty = false;
}
if (mStagingProperties.mAnimatablePropertiesDirty) {
mProperties.syncAnimatableProperties(mStagingProperties);
} else {
mStagingProperties.syncAnimatableProperties(mProperties);
}
mStagingProperties.mAnimatablePropertiesDirty = false;
mRootNode->syncProperties();
}
class TreeProperties {
public:
TreeProperties(Tree* tree) : mTree(tree) {}
// Properties that can only be modified by UI thread, therefore sync should
// only go from UI to RT
struct NonAnimatableProperties {
float viewportWidth = 0;
float viewportHeight = 0;
SkRect bounds;
int scaledWidth = 0;
int scaledHeight = 0;
SkColorFilter* colorFilter = nullptr;
~NonAnimatableProperties() {
SkSafeUnref(colorFilter);
}
} mNonAnimatableProperties;
bool mNonAnimatablePropertiesDirty = true;
float mRootAlpha = 1.0f;
bool mAnimatablePropertiesDirty = true;
void syncNonAnimatableProperties(const TreeProperties& prop) {
// Copy over the data that can only be changed in UI thread
if (mNonAnimatableProperties.colorFilter != prop.mNonAnimatableProperties.colorFilter) {
SkRefCnt_SafeAssign(mNonAnimatableProperties.colorFilter,
prop.mNonAnimatableProperties.colorFilter);
}
mNonAnimatableProperties = prop.mNonAnimatableProperties;
}
void setViewportSize(float width, float height) {
if (mNonAnimatableProperties.viewportWidth != width
|| mNonAnimatableProperties.viewportHeight != height) {
mNonAnimatablePropertiesDirty = true;
mNonAnimatableProperties.viewportWidth = width;
mNonAnimatableProperties.viewportHeight = height;
mTree->onPropertyChanged(this);
}
}
void setBounds(const SkRect& bounds) {
if (mNonAnimatableProperties.bounds != bounds) {
mNonAnimatableProperties.bounds = bounds;
mNonAnimatablePropertiesDirty = true;
mTree->onPropertyChanged(this);
}
}
void setScaledSize(int width, int height) {
if (mNonAnimatableProperties.scaledWidth != width
|| mNonAnimatableProperties.scaledHeight != height) {
mNonAnimatableProperties.scaledWidth = width;
mNonAnimatableProperties.scaledHeight = height;
mNonAnimatablePropertiesDirty = true;
mTree->onPropertyChanged(this);
}
}
void setColorFilter(SkColorFilter* filter) {
if (UPDATE_SKPROP(mNonAnimatableProperties.colorFilter, filter)) {
mNonAnimatablePropertiesDirty = true;
mTree->onPropertyChanged(this);
}
}
SkColorFilter* getColorFilter() const{
return mNonAnimatableProperties.colorFilter;
}
float getViewportWidth() const {
return mNonAnimatableProperties.viewportWidth;
}
float getViewportHeight() const {
return mNonAnimatableProperties.viewportHeight;
}
float getScaledWidth() const {
return mNonAnimatableProperties.scaledWidth;
}
float getScaledHeight() const {
return mNonAnimatableProperties.scaledHeight;
}
void syncAnimatableProperties(const TreeProperties& prop) {
mRootAlpha = prop.mRootAlpha;
}
bool setRootAlpha(float rootAlpha) {
if (rootAlpha != mRootAlpha) {
mAnimatablePropertiesDirty = true;
mRootAlpha = rootAlpha;
mTree->onPropertyChanged(this);
return true;
}
return false;
}
float getRootAlpha() const { return mRootAlpha;}
const SkRect& getBounds() const {
return mNonAnimatableProperties.bounds;
}
Tree* mTree;
};
void onPropertyChanged(TreeProperties* prop);
TreeProperties* mutateStagingProperties() { return &mStagingProperties; }
const TreeProperties* stagingProperties() { return &mStagingProperties; }
PushStagingFunctor* getFunctor() { return &mFunctor;}
// This should only be called from animations on RT
TreeProperties* mutateProperties() { return &mProperties; }
private:
class VectorDrawableFunctor : public PushStagingFunctor {
public:
VectorDrawableFunctor(Tree* tree) : mTree(tree) {}
virtual void operator ()() {
mTree->syncProperties();
}
private:
Tree* mTree;
};
SkPaint* updatePaint(SkPaint* outPaint, TreeProperties* prop);
bool allocateBitmapIfNeeded(SkBitmap* outCache, int width, int height);
bool canReuseBitmap(const SkBitmap&, int width, int height);
void updateBitmapCache(SkBitmap* outCache, bool useStagingData);
// Cap the bitmap size, such that it won't hurt the performance too much
// and it won't crash due to a very large scale.
// The drawable will look blurry above this size.
const static int MAX_CACHED_BITMAP_SIZE;
bool mAllowCaching = true;
std::unique_ptr<Group> mRootNode;
TreeProperties mProperties = TreeProperties(this);
TreeProperties mStagingProperties = TreeProperties(this);
VectorDrawableFunctor mFunctor = VectorDrawableFunctor(this);
SkPaint mPaint;
struct Cache {
SkBitmap bitmap;
bool dirty = true;
};
Cache mStagingCache;
Cache mCache;
PropertyChangedListener mPropertyChangedListener
= PropertyChangedListener(&mCache.dirty, &mStagingCache.dirty);
};
} // namespace VectorDrawable
typedef VectorDrawable::Path::Data PathData;
} // namespace uirenderer
} // namespace android
#endif // ANDROID_HWUI_VPATH_H