1 /* libs/android_runtime/android/graphics/PathMeasure.cpp
2 **
3 ** Copyright 2007, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #include <log/log.h>
19
20 #include "GraphicsJNI.h"
21 #include "SkPath.h"
22 #include "SkPoint.h"
23
24 namespace android {
25
26 class SkPathIteratorGlue {
27 public:
finalizer(SkPath::RawIter * obj)28 static void finalizer(SkPath::RawIter* obj) { delete obj; }
29
getFinalizer(JNIEnv * env,jclass clazz)30 static jlong getFinalizer(JNIEnv* env, jclass clazz) {
31 return static_cast<jlong>(reinterpret_cast<uintptr_t>(&finalizer));
32 }
33
create(JNIEnv * env,jobject clazz,jlong pathHandle)34 static jlong create(JNIEnv* env, jobject clazz, jlong pathHandle) {
35 const SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
36 return reinterpret_cast<jlong>(new SkPath::RawIter(*path));
37 }
38
39 // ---------------- @CriticalNative -------------------------
40
peek(CRITICAL_JNI_PARAMS_COMMA jlong iteratorHandle)41 static jint peek(CRITICAL_JNI_PARAMS_COMMA jlong iteratorHandle) {
42 SkPath::RawIter* iterator = reinterpret_cast<SkPath::RawIter*>(iteratorHandle);
43 return iterator->peek();
44 }
45
next(CRITICAL_JNI_PARAMS_COMMA jlong iteratorHandle,jlong pointsArray)46 static jint next(CRITICAL_JNI_PARAMS_COMMA jlong iteratorHandle, jlong pointsArray) {
47 static_assert(SkPath::kMove_Verb == 0, "SkPath::Verb unexpected index");
48 static_assert(SkPath::kLine_Verb == 1, "SkPath::Verb unexpected index");
49 static_assert(SkPath::kQuad_Verb == 2, "SkPath::Verb unexpected index");
50 static_assert(SkPath::kConic_Verb == 3, "SkPath::Verb unexpected index");
51 static_assert(SkPath::kCubic_Verb == 4, "SkPath::Verb unexpected index");
52 static_assert(SkPath::kClose_Verb == 5, "SkPath::Verb unexpected index");
53 static_assert(SkPath::kDone_Verb == 6, "SkPath::Verb unexpected index");
54
55 SkPath::RawIter* iterator = reinterpret_cast<SkPath::RawIter*>(iteratorHandle);
56 float* points = reinterpret_cast<float*>(pointsArray);
57 SkPath::Verb verb =
58 static_cast<SkPath::Verb>(iterator->next(reinterpret_cast<SkPoint*>(points)));
59 if (verb == SkPath::kConic_Verb) {
60 float weight = iterator->conicWeight();
61 points[6] = weight;
62 }
63 return static_cast<int>(verb);
64 }
65 };
66
67 static const JNINativeMethod methods[] = {
68 {"nCreate", "(J)J", (void*)SkPathIteratorGlue::create},
69 {"nGetFinalizer", "()J", (void*)SkPathIteratorGlue::getFinalizer},
70
71 // ------- @CriticalNative below here ------------------
72
73 {"nPeek", "(J)I", (void*)SkPathIteratorGlue::peek},
74 {"nNext", "(JJ)I", (void*)SkPathIteratorGlue::next},
75 };
76
register_android_graphics_PathIterator(JNIEnv * env)77 int register_android_graphics_PathIterator(JNIEnv* env) {
78 return RegisterMethodsOrDie(env, "android/graphics/PathIterator", methods, NELEM(methods));
79 }
80
81 } // namespace android
82