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      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 
     28 #include "core_jni_helpers.h"
     29 
     30 namespace android {
     31 
     32 using namespace uirenderer;
     33 
     34 static struct {
     35     jclass clazz;
     36 
     37     jmethodID callOnFinished;
     38 } gRenderNodeAnimatorClassInfo;
     39 
     40 static 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 
     48 class AnimationListenerLifecycleChecker : public AnimationListener {
     49 public:
     50     virtual void onAnimationFinished(BaseRenderNodeAnimator* animator) {
     51         LOG_ALWAYS_FATAL("Lifecycle failure, nStart(%p) wasn't called", animator);
     52     }
     53 };
     54 
     55 static AnimationListenerLifecycleChecker sLifecycleChecker;
     56 
     57 class AnimationListenerBridge : public AnimationListener {
     58 public:
     59     // This holds a strong reference to a Java WeakReference<T> object. This avoids
     60     // cyclic-references-of-doom. If you think "I know, just use NewWeakGlobalRef!"
     61     // then you end up with basically a PhantomReference, which is totally not
     62     // what we want.
     63     AnimationListenerBridge(JNIEnv* env, jobject finishListener) {
     64         mFinishListener = env->NewGlobalRef(finishListener);
     65         env->GetJavaVM(&mJvm);
     66     }
     67 
     68     virtual ~AnimationListenerBridge() {
     69         if (mFinishListener) {
     70             onAnimationFinished(NULL);
     71         }
     72     }
     73 
     74     virtual void onAnimationFinished(BaseRenderNodeAnimator*) {
     75         LOG_ALWAYS_FATAL_IF(!mFinishListener, "Finished listener twice?");
     76         JNIEnv* env = getEnv(mJvm);
     77         env->CallStaticVoidMethod(
     78                 gRenderNodeAnimatorClassInfo.clazz,
     79                 gRenderNodeAnimatorClassInfo.callOnFinished,
     80                 mFinishListener);
     81         releaseJavaObject();
     82     }
     83 
     84 private:
     85     void releaseJavaObject() {
     86         JNIEnv* env = getEnv(mJvm);
     87         env->DeleteGlobalRef(mFinishListener);
     88         mFinishListener = NULL;
     89     }
     90 
     91     JavaVM* mJvm;
     92     jobject mFinishListener;
     93 };
     94 
     95 static inline RenderPropertyAnimator::RenderProperty toRenderProperty(jint property) {
     96     LOG_ALWAYS_FATAL_IF(property < 0 || property > RenderPropertyAnimator::ALPHA,
     97             "Invalid property %d", property);
     98     return static_cast<RenderPropertyAnimator::RenderProperty>(property);
     99 }
    100 
    101 static inline CanvasPropertyPaintAnimator::PaintField toPaintField(jint field) {
    102     LOG_ALWAYS_FATAL_IF(field < 0
    103             || field > CanvasPropertyPaintAnimator::ALPHA,
    104             "Invalid paint field %d", field);
    105     return static_cast<CanvasPropertyPaintAnimator::PaintField>(field);
    106 }
    107 
    108 static jlong createAnimator(JNIEnv* env, jobject clazz,
    109         jint propertyRaw, jfloat finalValue) {
    110     RenderPropertyAnimator::RenderProperty property = toRenderProperty(propertyRaw);
    111     BaseRenderNodeAnimator* animator = new RenderPropertyAnimator(property, finalValue);
    112     animator->setListener(&sLifecycleChecker);
    113     return reinterpret_cast<jlong>( animator );
    114 }
    115 
    116 static jlong createCanvasPropertyFloatAnimator(JNIEnv* env, jobject clazz,
    117         jlong canvasPropertyPtr, jfloat finalValue) {
    118     CanvasPropertyPrimitive* canvasProperty = reinterpret_cast<CanvasPropertyPrimitive*>(canvasPropertyPtr);
    119     BaseRenderNodeAnimator* animator = new CanvasPropertyPrimitiveAnimator(canvasProperty, finalValue);
    120     animator->setListener(&sLifecycleChecker);
    121     return reinterpret_cast<jlong>( animator );
    122 }
    123 
    124 static jlong createCanvasPropertyPaintAnimator(JNIEnv* env, jobject clazz,
    125         jlong canvasPropertyPtr, jint paintFieldRaw,
    126         jfloat finalValue) {
    127     CanvasPropertyPaint* canvasProperty = reinterpret_cast<CanvasPropertyPaint*>(canvasPropertyPtr);
    128     CanvasPropertyPaintAnimator::PaintField paintField = toPaintField(paintFieldRaw);
    129     BaseRenderNodeAnimator* animator = new CanvasPropertyPaintAnimator(
    130             canvasProperty, paintField, finalValue);
    131     animator->setListener(&sLifecycleChecker);
    132     return reinterpret_cast<jlong>( animator );
    133 }
    134 
    135 static jlong createRevealAnimator(JNIEnv* env, jobject clazz,
    136         jint centerX, jint centerY, jfloat startRadius, jfloat endRadius) {
    137     BaseRenderNodeAnimator* animator = new RevealAnimator(centerX, centerY, startRadius, endRadius);
    138     animator->setListener(&sLifecycleChecker);
    139     return reinterpret_cast<jlong>( animator );
    140 }
    141 
    142 static void setStartValue(JNIEnv* env, jobject clazz, jlong animatorPtr, jfloat startValue) {
    143     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    144     animator->setStartValue(startValue);
    145 }
    146 
    147 static void setDuration(JNIEnv* env, jobject clazz, jlong animatorPtr, jlong duration) {
    148     LOG_ALWAYS_FATAL_IF(duration < 0, "Duration cannot be negative");
    149     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    150     animator->setDuration(duration);
    151 }
    152 
    153 static jlong getDuration(JNIEnv* env, jobject clazz, jlong animatorPtr) {
    154     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    155     return static_cast<jlong>(animator->duration());
    156 }
    157 
    158 static void setStartDelay(JNIEnv* env, jobject clazz, jlong animatorPtr, jlong startDelay) {
    159     LOG_ALWAYS_FATAL_IF(startDelay < 0, "Start delay cannot be negative");
    160     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    161     animator->setStartDelay(startDelay);
    162 }
    163 
    164 static void setInterpolator(JNIEnv* env, jobject clazz, jlong animatorPtr, jlong interpolatorPtr) {
    165     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    166     Interpolator* interpolator = reinterpret_cast<Interpolator*>(interpolatorPtr);
    167     animator->setInterpolator(interpolator);
    168 }
    169 
    170 static void setAllowRunningAsync(JNIEnv* env, jobject clazz, jlong animatorPtr, jboolean mayRunAsync) {
    171     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    172     animator->setAllowRunningAsync(mayRunAsync);
    173 }
    174 
    175 static void setListener(JNIEnv* env, jobject clazz, jlong animatorPtr, jobject finishListener) {
    176     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    177     animator->setListener(new AnimationListenerBridge(env, finishListener));
    178 }
    179 
    180 static void start(JNIEnv* env, jobject clazz, jlong animatorPtr) {
    181     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    182     animator->start();
    183 }
    184 
    185 static void end(JNIEnv* env, jobject clazz, jlong animatorPtr) {
    186     BaseRenderNodeAnimator* animator = reinterpret_cast<BaseRenderNodeAnimator*>(animatorPtr);
    187     animator->cancel();
    188 }
    189 
    190 // ----------------------------------------------------------------------------
    191 // JNI Glue
    192 // ----------------------------------------------------------------------------
    193 
    194 const char* const kClassPathName = "android/view/RenderNodeAnimator";
    195 
    196 static const JNINativeMethod gMethods[] = {
    197     { "nCreateAnimator", "(IF)J", (void*) createAnimator },
    198     { "nCreateCanvasPropertyFloatAnimator", "(JF)J", (void*) createCanvasPropertyFloatAnimator },
    199     { "nCreateCanvasPropertyPaintAnimator", "(JIF)J", (void*) createCanvasPropertyPaintAnimator },
    200     { "nCreateRevealAnimator", "(IIFF)J", (void*) createRevealAnimator },
    201     { "nSetStartValue", "(JF)V", (void*) setStartValue },
    202     { "nSetDuration", "(JJ)V", (void*) setDuration },
    203     { "nGetDuration", "(J)J", (void*) getDuration },
    204     { "nSetStartDelay", "(JJ)V", (void*) setStartDelay },
    205     { "nSetInterpolator", "(JJ)V", (void*) setInterpolator },
    206     { "nSetAllowRunningAsync", "(JZ)V", (void*) setAllowRunningAsync },
    207     { "nSetListener", "(JLandroid/view/RenderNodeAnimator;)V", (void*) setListener},
    208     { "nStart", "(J)V", (void*) start},
    209     { "nEnd", "(J)V", (void*) end },
    210 };
    211 
    212 int register_android_view_RenderNodeAnimator(JNIEnv* env) {
    213     sLifecycleChecker.incStrong(0);
    214     gRenderNodeAnimatorClassInfo.clazz = FindClassOrDie(env, kClassPathName);
    215     gRenderNodeAnimatorClassInfo.clazz = MakeGlobalRefOrDie(env,
    216                                                             gRenderNodeAnimatorClassInfo.clazz);
    217 
    218     gRenderNodeAnimatorClassInfo.callOnFinished = GetStaticMethodIDOrDie(
    219             env, gRenderNodeAnimatorClassInfo.clazz, "callOnFinished",
    220             "(Landroid/view/RenderNodeAnimator;)V");
    221 
    222     return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
    223 }
    224 
    225 
    226 } // namespace android
    227