1 files changed, 84 insertions, 0 deletions
diff --git a/libs/hwui/jni/Interpolator.cpp b/libs/hwui/jni/Interpolator.cpp
new file mode 100644
index 000000000000..146d634a297c
--- /dev/null
+++ b/libs/hwui/jni/Interpolator.cpp
@@ -0,0 +1,84 @@
+#include "GraphicsJNI.h"
+#include "SkInterpolator.h"
+
+static jlong Interpolator_constructor(JNIEnv* env, jobject clazz, jint valueCount, jint frameCount)
+{
+    return reinterpret_cast<jlong>(new SkInterpolator(valueCount, frameCount));
+}
+
+static void Interpolator_destructor(JNIEnv* env, jobject clazz, jlong interpHandle)
+{
+    SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
+    delete interp;
+}
+
+static void Interpolator_reset(JNIEnv* env, jobject clazz, jlong interpHandle, jint valueCount, jint frameCount)
+{
+    SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
+    interp->reset(valueCount, frameCount);
+}
+
+static void Interpolator_setKeyFrame(JNIEnv* env, jobject clazz, jlong interpHandle, jint index, jint msec, jfloatArray valueArray, jfloatArray blendArray)
+{
+    SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
+
+    AutoJavaFloatArray autoValues(env, valueArray);
+    AutoJavaFloatArray autoBlend(env, blendArray, 4);
+#ifdef SK_SCALAR_IS_FLOAT
+    SkScalar* scalars = autoValues.ptr();
+    SkScalar* blend = autoBlend.ptr();
+#else
+    #error Need to convert float array to SkScalar array before calling the following function.
+#endif
+
+    interp->setKeyFrame(index, msec, scalars, blend);
+}
+
+static void Interpolator_setRepeatMirror(JNIEnv* env, jobject clazz, jlong interpHandle, jfloat repeatCount, jboolean mirror)
+{
+    SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
+    if (repeatCount > 32000)
+        repeatCount = 32000;
+
+    interp->setRepeatCount(repeatCount);
+    interp->setMirror(mirror != 0);
+}
+
+static jint Interpolator_timeToValues(JNIEnv* env, jobject clazz, jlong interpHandle, jint msec, jfloatArray valueArray)
+{
+    SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle);
+    SkInterpolatorBase::Result result;
+
+    float* values = valueArray ? env->GetFloatArrayElements(valueArray, NULL) : NULL;
+    result = interp->timeToValues(msec, (SkScalar*)values);
+
+    if (valueArray) {
+        int n = env->GetArrayLength(valueArray);
+        for (int i = 0; i < n; i++) {
+            values[i] = SkScalarToFloat(*(SkScalar*)&values[i]);
+        }
+        env->ReleaseFloatArrayElements(valueArray, values, 0);
+    }
+
+    return static_cast<jint>(result);
+}
+
+// ----------------------------------------------------------------------------
+
+/*
+ * JNI registration.
+ */
+static const JNINativeMethod gInterpolatorMethods[] = {
+    { "nativeConstructor",      "(II)J",        (void*)Interpolator_constructor     },
+    { "nativeDestructor",       "(J)V",         (void*)Interpolator_destructor      },
+    { "nativeReset",            "(JII)V",       (void*)Interpolator_reset           },
+    { "nativeSetKeyFrame",      "(JII[F[F)V",   (void*)Interpolator_setKeyFrame     },
+    { "nativeSetRepeatMirror",  "(JFZ)V",       (void*)Interpolator_setRepeatMirror },
+    { "nativeTimeToValues",     "(JI[F)I",      (void*)Interpolator_timeToValues    }
+};
+
+int register_android_graphics_Interpolator(JNIEnv* env)
+{
+    return android::RegisterMethodsOrDie(env, "android/graphics/Interpolator",
+                                         gInterpolatorMethods, NELEM(gInterpolatorMethods));
+}