1 /*
2 * Copyright 2020 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 <android/native_window_jni.h>
18
19 #include <cassert>
20 #include <cerrno>
21 #include <dlfcn.h>
22
23 extern "C" {
24
25 JNIEXPORT jint JNICALL
Java_androidx_camera_testing_impl_SurfaceUtil_nativeGetSurfaceFormat(JNIEnv * env,jclass clazz,jobject jsurface)26 Java_androidx_camera_testing_impl_SurfaceUtil_nativeGetSurfaceFormat(JNIEnv *env, jclass clazz,
27 jobject jsurface) {
28 ANativeWindow *nativeWindow = ANativeWindow_fromSurface(env, jsurface);
29 assert(nativeWindow != nullptr);
30 int32_t format = ANativeWindow_getFormat(nativeWindow);
31 ANativeWindow_release(nativeWindow);
32 return format;
33 }
34
35 JNIEXPORT jint JNICALL
Java_androidx_camera_testing_impl_SurfaceUtil_nativeSetBuffersTransform(JNIEnv * env,jclass clazz,jobject jsurface,jint transform)36 Java_androidx_camera_testing_impl_SurfaceUtil_nativeSetBuffersTransform(
37 JNIEnv *env,
38 jclass clazz,
39 jobject jsurface,
40 jint transform) {
41 // Load libnativewindow for newer APIs
42 void* libnativewindow = dlopen("libnativewindow.so", RTLD_NOW);
43 if (!libnativewindow) {
44 // Unable to load libnativewindow
45 return -ENOENT;
46 }
47
48 // Load ANativeWindow_setBuffersTransform which was added in API 26
49 int32_t (*ANativeWindow_setBuffersTransform)(ANativeWindow*, int32_t);
50
51 ANativeWindow_setBuffersTransform = (int32_t(*)(ANativeWindow*, int32_t))
52 dlsym(libnativewindow, "ANativeWindow_setBuffersTransform");
53
54 if (!ANativeWindow_setBuffersTransform) {
55 dlclose(libnativewindow);
56 // Unable to load ANativeWindow_setBuffersTransform
57 return -ENOSYS;
58 }
59
60 ANativeWindow *nativeWindow = ANativeWindow_fromSurface(env, jsurface);
61 auto transformValue = (ANativeWindowTransform)transform;
62 assert(nativeWindow != nullptr);
63 int32_t result = ANativeWindow_setBuffersTransform(nativeWindow, transformValue);
64 ANativeWindow_release(nativeWindow);
65 return result;
66 }
67
68 } // extern "C"
69