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// Copyright 2016 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 <cstdint>
#include <memory>
#include <vector>
#include "core/fxcodec/codec/ccodec_jpxmodule.h"
#include "core/fxcodec/codec/cjpx_decoder.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
CCodec_JpxModule g_module;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
std::unique_ptr<CJPX_Decoder> decoder =
g_module.CreateDecoder(data, size, nullptr);
if (!decoder)
return 0;
uint32_t width;
uint32_t height;
uint32_t components;
g_module.GetImageInfo(decoder.get(), &width, &height, &components);
static constexpr uint32_t kMemLimit = 1024 * 1024 * 1024; // 1 GB.
FX_SAFE_UINT32 mem = width;
mem *= height;
mem *= components;
if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
return 0;
FXDIB_Format format;
if (components == 1) {
format = FXDIB_8bppRgb;
} else if (components <= 3) {
format = FXDIB_Rgb;
} else if (components == 4) {
format = FXDIB_Rgb32;
} else {
width = (width * components + 2) / 3;
format = FXDIB_Rgb;
}
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!bitmap->Create(width, height, format))
return 0;
std::vector<uint8_t> output_offsets(components);
for (uint32_t i = 0; i < components; ++i)
output_offsets[i] = i;
g_module.Decode(decoder.get(), bitmap->GetBuffer(), bitmap->GetPitch(),
output_offsets);
return 0;
}
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