android_view_RenderNodeAnimator.cpp revision 9fa4071c4768c63902c6a74a4b480b51a8b95d43 
1/*
2 * Copyright (C) 2013 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#define LOG_TAG "OpenGLRenderer"
18
19#include "jni.h"
20#include "GraphicsJNI.h"
21#include <nativehelper/JNIHelp.h>
22#include <android_runtime/AndroidRuntime.h>
23
24#include <Animator.h>
25#include <Interpolator.h>
26#include <RenderProperties.h>
27
28namespace android {
29
30using namespace uirenderer;
31
32static struct {
33    jclass clazz;
34
35    jmethodID callOnFinished;
36} gRenderNodeAnimatorClassInfo;
37
38#ifdef USE_OPENGL_RENDERER
39
40static JNIEnv* getEnv(JavaVM* vm) {
41    JNIEnv* env;
42    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
43        return 0;
44    }
45    return env;
46}
47
48class AnimationListenerBridge : public AnimationListener {
49public:
50    // This holds a strong reference to a Java WeakReference<T> object. This avoids
51    // cyclic-references-of-doom. If you think "I know, just use NewWeakGlobalRef!"
52    // then you end up with basically a PhantomReference, which is totally not
53    // what we want.
54    AnimationListenerBridge(JNIEnv* env, jobject weakThis) {
55        mWeakThis = env->NewGlobalRef(weakThis);
56        env->GetJavaVM(&mJvm);
57    }
58
59    virtual ~AnimationListenerBridge() {
60        JNIEnv* env = getEnv(mJvm);
61        env->DeleteGlobalRef(mWeakThis);
62        mWeakThis = NULL;
63    }
64
65    virtual void onAnimationFinished(BaseAnimator*) {
66        JNIEnv* env = getEnv(mJvm);
67        env->CallStaticVoidMethod(
68                gRenderNodeAnimatorClassInfo.clazz,
69                gRenderNodeAnimatorClassInfo.callOnFinished,
70                mWeakThis);
71    }
72
73private:
74    JavaVM* mJvm;
75    jobject mWeakThis;
76};
77
78static inline RenderPropertyAnimator::RenderProperty toRenderProperty(jint property) {
79    LOG_ALWAYS_FATAL_IF(property < 0 || property > RenderPropertyAnimator::ALPHA,
80            "Invalid property %d", property);
81    return static_cast<RenderPropertyAnimator::RenderProperty>(property);
82}
83
84static inline RenderPropertyAnimator::DeltaValueType toDeltaType(jint deltaType) {
85    LOG_ALWAYS_FATAL_IF(deltaType != RenderPropertyAnimator::DELTA
86            && deltaType != RenderPropertyAnimator::ABSOLUTE,
87            "Invalid delta type %d", deltaType);
88    return static_cast<RenderPropertyAnimator::DeltaValueType>(deltaType);
89}
90
91static inline CanvasPropertyPaintAnimator::PaintField toPaintField(jint field) {
92    LOG_ALWAYS_FATAL_IF(field < 0
93            || field > CanvasPropertyPaintAnimator::ALPHA,
94            "Invalid paint field %d", field);
95    return static_cast<CanvasPropertyPaintAnimator::PaintField>(field);
96}
97
98static jlong createAnimator(JNIEnv* env, jobject clazz, jobject weakThis,
99        jint propertyRaw, jint deltaTypeRaw, jfloat deltaValue) {
100    RenderPropertyAnimator::RenderProperty property = toRenderProperty(propertyRaw);
101    RenderPropertyAnimator::DeltaValueType deltaType = toDeltaType(deltaTypeRaw);
102
103    BaseAnimator* animator = new RenderPropertyAnimator(property, deltaType, deltaValue);
104    animator->setListener(new AnimationListenerBridge(env, weakThis));
105    return reinterpret_cast<jlong>( animator );
106}
107
108static jlong createCanvasPropertyFloatAnimator(JNIEnv* env, jobject clazz,
109        jobject weakThis, jlong canvasPropertyPtr, jint deltaTypeRaw, jfloat deltaValue) {
110    RenderPropertyAnimator::DeltaValueType deltaType = toDeltaType(deltaTypeRaw);
111    CanvasPropertyPrimitive* canvasProperty = reinterpret_cast<CanvasPropertyPrimitive*>(canvasPropertyPtr);
112    BaseAnimator* animator = new CanvasPropertyPrimitiveAnimator(canvasProperty, deltaType, deltaValue);
113    animator->setListener(new AnimationListenerBridge(env, weakThis));
114    return reinterpret_cast<jlong>( animator );
115}
116
117static jlong createCanvasPropertyPaintAnimator(JNIEnv* env, jobject clazz,
118        jobject weakThis, jlong canvasPropertyPtr, jint paintFieldRaw,
119        jint deltaTypeRaw, jfloat deltaValue) {
120    RenderPropertyAnimator::DeltaValueType deltaType = toDeltaType(deltaTypeRaw);
121    CanvasPropertyPaint* canvasProperty = reinterpret_cast<CanvasPropertyPaint*>(canvasPropertyPtr);
122    CanvasPropertyPaintAnimator::PaintField paintField = toPaintField(paintFieldRaw);
123    BaseAnimator* animator = new CanvasPropertyPaintAnimator(
124            canvasProperty, paintField, deltaType, deltaValue);
125    animator->setListener(new AnimationListenerBridge(env, weakThis));
126    return reinterpret_cast<jlong>( animator );
127}
128
129static void setDuration(JNIEnv* env, jobject clazz, jlong animatorPtr, jint duration) {
130    LOG_ALWAYS_FATAL_IF(duration < 0, "Duration cannot be negative");
131    BaseAnimator* animator = reinterpret_cast<BaseAnimator*>(animatorPtr);
132    animator->setDuration(duration);
133}
134
135#endif
136
137// ----------------------------------------------------------------------------
138// JNI Glue
139// ----------------------------------------------------------------------------
140
141const char* const kClassPathName = "android/view/RenderNodeAnimator";
142
143static JNINativeMethod gMethods[] = {
144#ifdef USE_OPENGL_RENDERER
145    { "nCreateAnimator", "(Ljava/lang/ref/WeakReference;IIF)J", (void*) createAnimator },
146    { "nCreateCanvasPropertyFloatAnimator", "(Ljava/lang/ref/WeakReference;JIF)J", (void*) createCanvasPropertyFloatAnimator },
147    { "nCreateCanvasPropertyPaintAnimator", "(Ljava/lang/ref/WeakReference;JIIF)J", (void*) createCanvasPropertyPaintAnimator },
148    { "nSetDuration", "(JI)V", (void*) setDuration },
149#endif
150};
151
152#define FIND_CLASS(var, className) \
153        var = env->FindClass(className); \
154        LOG_FATAL_IF(! var, "Unable to find class " className);
155
156#define GET_STATIC_METHOD_ID(var, clazz, methodName, methodDescriptor) \
157        var = env->GetStaticMethodID(clazz, methodName, methodDescriptor); \
158        LOG_FATAL_IF(! var, "Unable to find method " methodName);
159
160int register_android_view_RenderNodeAnimator(JNIEnv* env) {
161    FIND_CLASS(gRenderNodeAnimatorClassInfo.clazz, kClassPathName);
162    gRenderNodeAnimatorClassInfo.clazz = jclass(env->NewGlobalRef(gRenderNodeAnimatorClassInfo.clazz));
163
164    GET_STATIC_METHOD_ID(gRenderNodeAnimatorClassInfo.callOnFinished, gRenderNodeAnimatorClassInfo.clazz,
165            "callOnFinished", "(Ljava/lang/ref/WeakReference;)V");
166
167    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
168}
169
170
171} // namespace android
172