1 /*
2  * Copyright 2018 Google, LLC
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #include "include/android/SkAnimatedImage.h"
9 #include "include/codec/SkAndroidCodec.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkData.h"
12 #include "include/core/SkSurface.h"
13 
FuzzAnimatedImage(sk_sp<SkData> bytes)14 bool FuzzAnimatedImage(sk_sp<SkData> bytes) {
15     auto codec = SkAndroidCodec::MakeFromData(bytes);
16     if (nullptr == codec) {
17         return false;
18     }
19     auto aImg = SkAnimatedImage::Make(std::move(codec));
20     if (nullptr == aImg) {
21         return false;
22     }
23 
24     auto s = SkSurface::MakeRasterN32Premul(128, 128);
25     if (!s) {
26         // May return nullptr in memory-constrained fuzzing environments
27         return false;
28     }
29 
30     int escape = 0;
31     while (!aImg->isFinished() && escape < 100) {
32         aImg->draw(s->getCanvas());
33         escape++;
34         aImg->decodeNextFrame();
35     }
36     return true;
37 }
38 
39 #if defined(SK_BUILD_FOR_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)40 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
41     if (size > 10240) {
42         return 0;
43     }
44     auto bytes = SkData::MakeWithoutCopy(data, size);
45     FuzzAnimatedImage(bytes);
46     return 0;
47 }
48 #endif
49