mirror of https://github.com/google/oss-fuzz.git
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// The fuzzer takes as input a buffer of bytes. The buffer is read in as:
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// <angle>, <x_center>, <y_center>, and the remaining bytes will be read
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// in as a <pix>. The image is then rotated by angle around the center. All
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// inputs should not result in undefined behavior.
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#include <cmath>
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#include <cstddef>
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#include <cstdint>
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#include <cstdlib>
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#include <cstring>
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#include "leptonica/allheaders.h"
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namespace {
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// Reads the front bytes of a data buffer containing `size` bytes as an int16_t,
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// and advances the buffer forward [if there is sufficient capacity]. If there
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// is insufficient capacity, this returns 0 and does not modify size or data.
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int16_t ReadInt16(const uint8_t** data, size_t* size) {
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int16_t result = 0;
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if (*size >= sizeof(result)) {
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memcpy(&result, *data, sizeof(result));
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*data += sizeof(result);
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*size -= sizeof(result);
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}
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return result;
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}
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} // namespace
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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const int16_t angle = ReadInt16(&data, &size);
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const int16_t x_center = ReadInt16(&data, &size);
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const int16_t y_center = ReadInt16(&data, &size);
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Pix* pix = pixReadMem(reinterpret_cast<const unsigned char*>(data), size);
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if (pix == nullptr) {
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return EXIT_SUCCESS;
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}
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constexpr float deg2rad = M_PI / 180.;
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Pix* pix_rotated = pixRotateShear(pix, x_center, y_center, deg2rad * angle,
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L_BRING_IN_WHITE);
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if (pix_rotated) {
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pixDestroy(&pix_rotated);
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}
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pixDestroy(&pix);
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return EXIT_SUCCESS;
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}
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