// Copyright 2018 Google Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

////////////////////////////////////////////////////////////////////////////////

#include <cstddef>

#include <cstdint>

#include <string>

#include <string_view>

#include "./fuzz_utils.h"

#include "gtest/gtest.h"

#include "webp/decode.h"

#include "webp/demux.h"

#include "webp/mux_types.h"

namespace {

void AnimationApiTest(std::string_view blob, bool use_threads,

                      WEBP_CSP_MODE color_mode) {

  const size_t size = blob.size();

  WebPData webp_data;

  WebPDataInit(&webp_data);

  webp_data.size = size;

  webp_data.bytes = reinterpret_cast<const uint8_t*>(blob.data());

  // WebPAnimDecoderNew uses WebPDemux internally to calloc canvas size.

  WebPDemuxer* const demux = WebPDemux(&webp_data);

  if (!demux) return;

  const uint32_t cw = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);

  const uint32_t ch = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);

  if ((size_t)cw * ch > fuzz_utils::kFuzzPxLimit) {

    WebPDemuxDelete(demux);

    return;

  }

  // In addition to canvas size, check each frame separately.

  WebPIterator iter;

  for (int i = 0; i < fuzz_utils::kFuzzFrameLimit; i++) {

    if (!WebPDemuxGetFrame(demux, i + 1, &iter)) break;

    int w, h;

    if (WebPGetInfo(iter.fragment.bytes, iter.fragment.size, &w, &h)) {

      if ((size_t)w * h >

          fuzz_utils::kFuzzPxLimit) {  // image size of the frame payload

        WebPDemuxReleaseIterator(&iter);

        WebPDemuxDelete(demux);

        return;

      }

    }

  }

  WebPDemuxReleaseIterator(&iter);

  WebPDemuxDelete(demux);

  WebPAnimDecoderOptions dec_options;

  if (!WebPAnimDecoderOptionsInit(&dec_options)) return;

  dec_options.use_threads = use_threads;

  dec_options.color_mode = color_mode;

  WebPAnimDecoder* dec = WebPAnimDecoderNew(&webp_data, &dec_options);

  if (!dec) return;

  for (int i = 0; i < fuzz_utils::kFuzzFrameLimit; i++) {

    uint8_t* buf;

    int timestamp;

    if (!WebPAnimDecoderGetNext(dec, &buf, &timestamp)) break;

  }

  WebPAnimDecoderDelete(dec);

}

}  // namespace

FUZZ_TEST(AnimationApi, AnimationApiTest)

    .WithDomains(fuzztest::String().WithMaxSize(fuzz_utils::kMaxWebPFileSize +

                                                1),

                 /*use_threads=*/fuzztest::Arbitrary<bool>(),

                 // Animations only support 4 (out of 12) modes.

                 fuzztest::ElementOf<WEBP_CSP_MODE>({MODE_RGBA, MODE_BGRA,

                                                     MODE_rgbA, MODE_bgrA}));

TEST(AnimationApi, Buganizer498965803) {

  AnimationApiTest(

      std::string("ALPH\000\000\000\000\000\000\000\000\021\000\000\000\t\305"

                  "\006d\301\013\177\000\000webp\034\205\000#@VP8 "

                  "!\000\000\000v\003\000\235\001*\007\200\"\000\0020("

                  "\000\377\377\377\003\000\000\000\311\311\311\311\311\311\311"

                  "\311\311\311\311\311\311\311\311\311\311\311\311\311\311\211"

                  "\311\311\311\311\311\030\030\030\030\030\030\311\311",

                  98),

      false, static_cast<WEBP_CSP_MODE>(1));

}