Home | History | Annotate | Download | only in graphics 
      1 #include "GraphicsJNI.h"
      2 #include "SkInterpolator.h"
      3 #include "core_jni_helpers.h"
      4 
      5 #include <jni.h>
      6 
      7 static jlong Interpolator_constructor(JNIEnv* env, jobject clazz, jint valueCount, jint frameCount)
      8 {
      9     return reinterpret_cast<jlong>(new SkInterpolator(valueCount, frameCount));
     10 }
     11 
     12 static void Interpolator_destructor(JNIEnv* env, jobject clazz, jlong interpHandle)
     13 {
     14     SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
     15     delete interp;
     16 }
     17 
     18 static void Interpolator_reset(JNIEnv* env, jobject clazz, jlong interpHandle, jint valueCount, jint frameCount)
     19 {
     20     SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
     21     interp->reset(valueCount, frameCount);
     22 }
     23 
     24 static void Interpolator_setKeyFrame(JNIEnv* env, jobject clazz, jlong interpHandle, jint index, jint msec, jfloatArray valueArray, jfloatArray blendArray)
     25 {
     26     SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
     27 
     28     AutoJavaFloatArray autoValues(env, valueArray);
     29     AutoJavaFloatArray autoBlend(env, blendArray, 4);
     30 #ifdef SK_SCALAR_IS_FLOAT
     31     SkScalar* scalars = autoValues.ptr();
     32     SkScalar* blend = autoBlend.ptr();
     33 #else
     34     #error Need to convert float array to SkScalar array before calling the following function.
     35 #endif
     36 
     37     interp->setKeyFrame(index, msec, scalars, blend);
     38 }
     39 
     40 static void Interpolator_setRepeatMirror(JNIEnv* env, jobject clazz, jlong interpHandle, jfloat repeatCount, jboolean mirror)
     41 {
     42     SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
     43     if (repeatCount > 32000)
     44         repeatCount = 32000;
     45 
     46     interp->setRepeatCount(repeatCount);
     47     interp->setMirror(mirror != 0);
     48 }
     49 
     50 static jint Interpolator_timeToValues(JNIEnv* env, jobject clazz, jlong interpHandle, jint msec, jfloatArray valueArray)
     51 {
     52     SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
     53     SkInterpolatorBase::Result result;
     54 
     55     float* values = valueArray ? env->GetFloatArrayElements(valueArray, NULL) : NULL;
     56     result = interp->timeToValues(msec, (SkScalar*)values);
     57 
     58     if (valueArray) {
     59         int n = env->GetArrayLength(valueArray);
     60         for (int i = 0; i < n; i++) {
     61             values[i] = SkScalarToFloat(*(SkScalar*)&values[i]);
     62         }
     63         env->ReleaseFloatArrayElements(valueArray, values, 0);
     64     }
     65 
     66     return static_cast<jint>(result);
     67 }
     68 
     69 // ----------------------------------------------------------------------------
     70 
     71 /*
     72  * JNI registration.
     73  */
     74 static const JNINativeMethod gInterpolatorMethods[] = {
     75     { "nativeConstructor",      "(II)J",        (void*)Interpolator_constructor     },
     76     { "nativeDestructor",       "(J)V",         (void*)Interpolator_destructor      },
     77     { "nativeReset",            "(JII)V",       (void*)Interpolator_reset           },
     78     { "nativeSetKeyFrame",      "(JII[F[F)V",   (void*)Interpolator_setKeyFrame     },
     79     { "nativeSetRepeatMirror",  "(JFZ)V",       (void*)Interpolator_setRepeatMirror },
     80     { "nativeTimeToValues",     "(JI[F)I",      (void*)Interpolator_timeToValues    }
     81 };
     82 
     83 int register_android_graphics_Interpolator(JNIEnv* env)
     84 {
     85     return android::RegisterMethodsOrDie(env, "android/graphics/Interpolator",
     86                                          gInterpolatorMethods, NELEM(gInterpolatorMethods));
     87 }
     88