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// Copyright 2019 The PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include "core/fxge/cfx_cliprgn.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "testing/fuzzers/pdfium_fuzzer_util.h"
#include "third_party/base/stl_util.h"
namespace {
constexpr FXDIB_Format kFormat[] = {
FXDIB_Invalid, FXDIB_1bppRgb, FXDIB_8bppRgb, FXDIB_Rgb,
FXDIB_Rgb32, FXDIB_1bppMask, FXDIB_8bppMask, FXDIB_8bppRgba,
FXDIB_Rgba, FXDIB_Argb, FXDIB_1bppCmyk, FXDIB_8bppCmyk,
FXDIB_Cmyk, FXDIB_8bppCmyka, FXDIB_Cmyka};
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
constexpr size_t kParameterSize = 33;
if (size < kParameterSize)
return 0;
int width = GetInteger(data);
int height = GetInteger(data + 4);
uint32_t argb = GetInteger(data + 8);
int src_left = GetInteger(data + 12);
int src_top = GetInteger(data + 16);
int dest_left = GetInteger(data + 20);
int dest_top = GetInteger(data + 24);
BlendMode blend_mode = static_cast<BlendMode>(
data[28] % (static_cast<int>(BlendMode::kLast) + 1));
FXDIB_Format dest_format = kFormat[data[29] % pdfium::size(kFormat)];
FXDIB_Format src_format = kFormat[data[30] % pdfium::size(kFormat)];
bool is_clip = !(data[31] % 2);
bool is_rgb_byte_order = !(data[32] % 2);
size -= kParameterSize;
data += kParameterSize;
auto src_bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
auto dest_bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!src_bitmap->Create(width, height, src_format) ||
!dest_bitmap->Create(width, height, dest_format)) {
return 0;
}
if (!src_bitmap->GetBuffer() || !dest_bitmap->GetBuffer()) {
return 0;
}
std::unique_ptr<CFX_ClipRgn> clip_rgn;
if (is_clip)
clip_rgn = std::make_unique<CFX_ClipRgn>(width, height);
if (src_bitmap->IsAlphaMask()) {
dest_bitmap->CompositeMask(dest_left, dest_top, width, height, src_bitmap,
argb, src_left, src_top, blend_mode,
clip_rgn.get(), is_rgb_byte_order);
} else {
dest_bitmap->CompositeBitmap(dest_left, dest_top, width, height, src_bitmap,
src_left, src_top, blend_mode, clip_rgn.get(),
is_rgb_byte_order);
}
return 0;
}