1 // Copyright 2019 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 "core/fxge/cfx_cliprgn.h"
6 #include "core/fxge/dib/cfx_dibitmap.h"
7 #include "core/fxge/fx_dib.h"
8 #include "testing/fuzzers/pdfium_fuzzer_util.h"
9 #include "third_party/base/ptr_util.h"
10
11 namespace {
12
13 constexpr FXDIB_Format kFormat[] = {
14 FXDIB_Invalid, FXDIB_1bppRgb, FXDIB_8bppRgb, FXDIB_Rgb,
15 FXDIB_Rgb32, FXDIB_1bppMask, FXDIB_8bppMask, FXDIB_8bppRgba,
16 FXDIB_Rgba, FXDIB_Argb, FXDIB_1bppCmyk, FXDIB_8bppCmyk,
17 FXDIB_Cmyk, FXDIB_8bppCmyka, FXDIB_Cmyka};
18
19 } // namespace
20
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)21 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
22 constexpr size_t kParameterSize = 33;
23 if (size < kParameterSize)
24 return 0;
25
26 int width = GetInteger(data);
27 int height = GetInteger(data + 4);
28 uint32_t argb = GetInteger(data + 8);
29 int src_left = GetInteger(data + 12);
30 int src_top = GetInteger(data + 16);
31 int dest_left = GetInteger(data + 20);
32 int dest_top = GetInteger(data + 24);
33
34 BlendMode blend_mode = static_cast<BlendMode>(
35 data[28] % (static_cast<int>(BlendMode::kLast) + 1));
36 FXDIB_Format dest_format = kFormat[data[29] % FX_ArraySize(kFormat)];
37 FXDIB_Format src_format = kFormat[data[30] % FX_ArraySize(kFormat)];
38 bool is_clip = !(data[31] % 2);
39 bool is_rgb_byte_order = !(data[32] % 2);
40 size -= kParameterSize;
41 data += kParameterSize;
42
43 auto src_bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
44 auto dest_bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
45 if (!src_bitmap->Create(width, height, src_format) ||
46 !dest_bitmap->Create(width, height, dest_format)) {
47 return 0;
48 }
49 if (!src_bitmap->GetBuffer() || !dest_bitmap->GetBuffer()) {
50 return 0;
51 }
52
53 std::unique_ptr<CFX_ClipRgn> clip_rgn;
54 if (is_clip)
55 clip_rgn = pdfium::MakeUnique<CFX_ClipRgn>(width, height);
56 if (src_bitmap->IsAlphaMask()) {
57 dest_bitmap->CompositeMask(dest_left, dest_top, width, height, src_bitmap,
58 argb, src_left, src_top, blend_mode,
59 clip_rgn.get(), is_rgb_byte_order);
60 } else {
61 dest_bitmap->CompositeBitmap(dest_left, dest_top, width, height, src_bitmap,
62 src_left, src_top, blend_mode, clip_rgn.get(),
63 is_rgb_byte_order);
64 }
65 return 0;
66 }
67