Interpolator.cpp revision 60126efd7d905ca24822765c6dafac17fef278ab
1#include "GraphicsJNI.h" 2#include "SkInterpolator.h" 3#include "core_jni_helpers.h" 4 5#include <jni.h> 6 7static jlong Interpolator_constructor(JNIEnv* env, jobject clazz, jint valueCount, jint frameCount) 8{ 9 return reinterpret_cast<jlong>(new SkInterpolator(valueCount, frameCount)); 10} 11 12static void Interpolator_destructor(JNIEnv* env, jobject clazz, jlong interpHandle) 13{ 14 SkInterpolator* interp = reinterpret_cast<SkInterpolator*>(interpHandle); 15 delete interp; 16} 17 18static 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 24static 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 40static 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 50static 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 */ 74static 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 83int register_android_graphics_Interpolator(JNIEnv* env) 84{ 85 return android::RegisterMethodsOrDie(env, "android/graphics/Interpolator", 86 gInterpolatorMethods, NELEM(gInterpolatorMethods)); 87} 88