1 /*
2 * Copyright (C) 2013 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
18 #include "jerr_hook.h"
19 #include "jni_defines.h"
20
21 /**
22 * Replaces libjpeg's error_exit function, returns control to
23 * the point
24 */
ErrExit(j_common_ptr cinfo)25 void ErrExit(j_common_ptr cinfo) {
26 ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err);
27 (*cinfo->err->output_message) (cinfo);
28 // Returns control to error handling in jpeg_writer
29 longjmp(mgr->setjmp_buf, 1);
30 }
31
32 /**
33 * Replaces libjpeg's output_message function, writes message
34 * to logcat's error log.
35 */
ErrOutput(j_common_ptr cinfo)36 void ErrOutput(j_common_ptr cinfo) {
37 char buf[JMSG_LENGTH_MAX];
38 (*cinfo->err->format_message) (cinfo, buf);
39 buf[JMSG_LENGTH_MAX - 1] = '\0'; // Force null terminator
40 // Output error message in ndk logcat.
41 LOGE("%s\n", buf);
42 }
43
SetupErrMgr(j_common_ptr cinfo,ErrManager * errMgr)44 void SetupErrMgr(j_common_ptr cinfo, ErrManager* errMgr) {
45 jpeg_std_error(&(errMgr->mgr));
46 errMgr->mgr.error_exit = ErrExit;
47 errMgr->mgr.output_message = ErrOutput;
48 cinfo->err = reinterpret_cast<struct jpeg_error_mgr*>(errMgr);
49 }
50
51
52