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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.
*/
#ifndef ANIMATOR_H
#define ANIMATOR_H
#include <cutils/compiler.h>
#include <utils/RefBase.h>
#include <utils/StrongPointer.h>
#include "CanvasProperty.h"
#include "Interpolator.h"
#include "TreeInfo.h"
#include "utils/Macros.h"
namespace android {
namespace uirenderer {
class RenderNode;
class RenderProperties;
class AnimationListener : public VirtualLightRefBase {
public:
ANDROID_API virtual void onAnimationFinished(BaseAnimator*) = 0;
protected:
ANDROID_API virtual ~AnimationListener() {}
};
// Helper class to contain generic animator helpers
class BaseAnimator : public VirtualLightRefBase {
PREVENT_COPY_AND_ASSIGN(BaseAnimator);
public:
ANDROID_API void setInterpolator(Interpolator* interpolator);
ANDROID_API void setDuration(nsecs_t durationInMs);
ANDROID_API nsecs_t duration() { return mDuration; }
ANDROID_API void setListener(AnimationListener* listener) {
mListener = listener;
}
bool isFinished() { return mPlayState == FINISHED; }
protected:
BaseAnimator();
virtual ~BaseAnimator();
// This is the main animation entrypoint that subclasses should call
// to generate the onAnimation* lifecycle events
// Returns true if the animation has finished, false otherwise
bool animateFrame(TreeInfo& info);
// Called when PlayState switches from PENDING to RUNNING
virtual void onAnimationStarted() {}
virtual void onAnimationUpdated(float fraction) = 0;
virtual void onAnimationFinished() {}
private:
void callOnFinishedListener(TreeInfo& info);
enum PlayState {
PENDING,
RUNNING,
FINISHED,
};
Interpolator* mInterpolator;
PlayState mPlayState;
long mStartTime;
long mDuration;
sp<AnimationListener> mListener;
};
class BaseRenderNodeAnimator : public BaseAnimator {
public:
// Since the UI thread doesn't necessarily know what the current values
// actually are and thus can't do the calculations, this is used to inform
// the animator how to lazy-resolve the input value
enum DeltaValueType {
// The delta value represents an absolute value endpoint
// mDeltaValue needs to be recalculated to be mDelta = (mDelta - fromValue)
// in onAnimationStarted()
ABSOLUTE = 0,
// The final value represents an offset from the current value
// No recalculation is needed
DELTA,
};
bool animate(RenderNode* target, TreeInfo& info);
protected:
BaseRenderNodeAnimator(DeltaValueType deltaType, float deltaValue);
RenderNode* target() const { return mTarget; }
virtual float getValue() const = 0;
virtual void setValue(float value) = 0;
private:
virtual void onAnimationStarted();
virtual void onAnimationUpdated(float fraction);
// mTarget is only valid inside animate()
RenderNode* mTarget;
BaseRenderNodeAnimator::DeltaValueType mDeltaValueType;
float mDeltaValue;
float mFromValue;
};
class RenderPropertyAnimator : public BaseRenderNodeAnimator {
public:
enum RenderProperty {
TRANSLATION_X = 0,
TRANSLATION_Y,
TRANSLATION_Z,
SCALE_X,
SCALE_Y,
ROTATION,
ROTATION_X,
ROTATION_Y,
X,
Y,
Z,
ALPHA,
};
ANDROID_API RenderPropertyAnimator(RenderProperty property,
DeltaValueType deltaType, float deltaValue);
protected:
ANDROID_API virtual float getValue() const;
ANDROID_API virtual void setValue(float value);
private:
typedef void (RenderProperties::*SetFloatProperty)(float value);
typedef float (RenderProperties::*GetFloatProperty)() const;
struct PropertyAccessors {
GetFloatProperty getter;
SetFloatProperty setter;
};
PropertyAccessors mPropertyAccess;
static const PropertyAccessors PROPERTY_ACCESSOR_LUT[];
};
class CanvasPropertyPrimitiveAnimator : public BaseRenderNodeAnimator {
public:
ANDROID_API CanvasPropertyPrimitiveAnimator(CanvasPropertyPrimitive* property,
DeltaValueType deltaType, float deltaValue);
protected:
ANDROID_API virtual float getValue() const;
ANDROID_API virtual void setValue(float value);
private:
sp<CanvasPropertyPrimitive> mProperty;
};
class CanvasPropertyPaintAnimator : public BaseRenderNodeAnimator {
public:
enum PaintField {
STROKE_WIDTH = 0,
ALPHA,
};
ANDROID_API CanvasPropertyPaintAnimator(CanvasPropertyPaint* property,
PaintField field, DeltaValueType deltaType, float deltaValue);
protected:
ANDROID_API virtual float getValue() const;
ANDROID_API virtual void setValue(float value);
private:
sp<CanvasPropertyPaint> mProperty;
PaintField mField;
};
} /* namespace uirenderer */
} /* namespace android */
#endif /* ANIMATOR_H */
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