1 /*
2 * Copyright (C) 2023 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 #include <minikin/GraphemeBreak.h>
18 #include <nativehelper/ScopedPrimitiveArray.h>
19
20 #include "GraphicsJNI.h"
21
22 namespace android {
23
nIsGraphemeBreak(JNIEnv * env,jclass,jfloatArray advances,jcharArray text,jint start,jint end,jbooleanArray isGraphemeBreak)24 static void nIsGraphemeBreak(JNIEnv* env, jclass, jfloatArray advances, jcharArray text, jint start,
25 jint end, jbooleanArray isGraphemeBreak) {
26 if (start > end || env->GetArrayLength(advances) < end ||
27 env->GetArrayLength(isGraphemeBreak) < end - start) {
28 doThrowAIOOBE(env);
29 }
30
31 if (start == end) {
32 return;
33 }
34
35 ScopedFloatArrayRO advancesArray(env, advances);
36 ScopedCharArrayRO textArray(env, text);
37 ScopedBooleanArrayRW isGraphemeBreakArray(env, isGraphemeBreak);
38
39 size_t count = end - start;
40 for (size_t offset = 0; offset < count; ++offset) {
41 bool isBreak = minikin::GraphemeBreak::isGraphemeBreak(advancesArray.get(), textArray.get(),
42 start, end, start + offset);
43 isGraphemeBreakArray[offset] = isBreak ? JNI_TRUE : JNI_FALSE;
44 }
45 }
46
47 static const JNINativeMethod gMethods[] = {
48 {"nIsGraphemeBreak",
49 "("
50 "[F" // advances
51 "[C" // text
52 "I" // start
53 "I" // end
54 "[Z" // isGraphemeBreak
55 ")V",
56 (void*)nIsGraphemeBreak},
57 };
58
register_android_graphics_text_GraphemeBreak(JNIEnv * env)59 int register_android_graphics_text_GraphemeBreak(JNIEnv* env) {
60 return RegisterMethodsOrDie(env, "android/graphics/text/GraphemeBreak", gMethods,
61 NELEM(gMethods));
62 }
63
64 } // namespace android
65