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 "SkCanvas.h"
9 #include "SkFontMgrPriv.h"
10 #include "SkPaint.h"
11 #include "SkReadBuffer.h"
12 #include "SkSurface.h"
13 #include "SkTestFontMgr.h"
14 #include "SkTextBlobPriv.h"
15 
FuzzTextBlobDeserialize(SkReadBuffer & buf)16 void FuzzTextBlobDeserialize(SkReadBuffer& buf) {
17     auto tb = SkTextBlobPriv::MakeFromBuffer(buf);
18     if (!buf.isValid()) {
19         return;
20     }
21 
22     auto s = SkSurface::MakeRasterN32Premul(128, 128);
23     if (!s) {
24         // May return nullptr in memory-constrained fuzzing environments
25         return;
26     }
27     s->getCanvas()->drawTextBlob(tb, 200, 200, SkPaint());
28 }
29 
30 #if defined(IS_FUZZING_WITH_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)31 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
32     gSkFontMgr_DefaultFactory = &sk_tool_utils::MakePortableFontMgr;
33     SkReadBuffer buf(data, size);
34     FuzzTextBlobDeserialize(buf);
35     return 0;
36 }
37 #endif
38