1 // Copyright 2016 The PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <cstdint>
6 #include <memory>
7 #include <vector>
8
9 #include "core/fxcodec/codec/ccodec_jpxmodule.h"
10 #include "core/fxcodec/codec/cjpx_decoder.h"
11 #include "core/fxcrt/fx_safe_types.h"
12 #include "core/fxge/dib/cfx_dibitmap.h"
13 #include "core/fxge/fx_dib.h"
14
15 CCodec_JpxModule g_module;
16
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)17 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
18 std::unique_ptr<CJPX_Decoder> decoder =
19 g_module.CreateDecoder(data, size, nullptr);
20 if (!decoder)
21 return 0;
22
23 uint32_t width;
24 uint32_t height;
25 uint32_t components;
26 g_module.GetImageInfo(decoder.get(), &width, &height, &components);
27
28 static constexpr uint32_t kMemLimit = 1024 * 1024 * 1024; // 1 GB.
29 FX_SAFE_UINT32 mem = width;
30 mem *= height;
31 mem *= components;
32 if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
33 return 0;
34
35 FXDIB_Format format;
36 if (components == 1) {
37 format = FXDIB_8bppRgb;
38 } else if (components <= 3) {
39 format = FXDIB_Rgb;
40 } else if (components == 4) {
41 format = FXDIB_Rgb32;
42 } else {
43 width = (width * components + 2) / 3;
44 format = FXDIB_Rgb;
45 }
46 auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
47 if (!bitmap->Create(width, height, format))
48 return 0;
49
50 std::vector<uint8_t> output_offsets(components);
51 for (uint32_t i = 0; i < components; ++i)
52 output_offsets[i] = i;
53
54 g_module.Decode(decoder.get(), bitmap->GetBuffer(), bitmap->GetPitch(),
55 output_offsets);
56 return 0;
57 }
58