1 /*
2  * Copyright 2018 Google Inc.
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 
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkPaint.h"
11 #include "include/core/SkSurface.h"
12 #include "src/core/SkRegionPriv.h"
13 
FuzzRegionDeserialize(sk_sp<SkData> bytes)14 bool FuzzRegionDeserialize(sk_sp<SkData> bytes) {
15     SkRegion region;
16     if (!region.readFromMemory(bytes->data(), bytes->size())) {
17         return false;
18     }
19     region.computeRegionComplexity();
20     region.isComplex();
21     SkRegion r2;
22     if (region == r2) {
23         region.contains(0,0);
24     } else {
25         region.contains(1,1);
26     }
27     auto s = SkSurface::MakeRasterN32Premul(128, 128);
28     if (!s) {
29         // May return nullptr in memory-constrained fuzzing environments
30         return false;
31     }
32     s->getCanvas()->drawRegion(region, SkPaint());
33     SkDEBUGCODE(SkRegionPriv::Validate(region));
34     return true;
35 }
36 
37 // TODO(kjlubick): remove IS_FUZZING... after https://crrev.com/c/2410304 lands
38 #if defined(SK_BUILD_FOR_LIBFUZZER) || defined(IS_FUZZING_WITH_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)39 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
40     if (size > 512) {
41         return 0;
42     }
43     auto bytes = SkData::MakeWithoutCopy(data, size);
44     FuzzRegionDeserialize(bytes);
45     return 0;
46 }
47 #endif
48