Draco fuzz coverage (#3980)

* added draco integration files

* wrote build file and Dockerfile for Draco

* added Apache 2 license header

* changed project maintainer, cleaned up draco_decoder_fuzzer, and set working directory in Dockerfile

* added a couple of fuzzers

* two more targets

* merged from upstream

* build point cloud encoding fuzzer, renamed quantization fuzzers

* added more fuzzers

* moved fuzzers and build script to https://github.com/google/draco, made the build script here execute the new one

Co-authored-by: Ravi Jotwani <rjotwani@google.com>

projects/draco/Dockerfile

@@ -18,5 +18,4 @@ FROM gcr.io/oss-fuzz-base/base-builder
 RUN apt-get update && apt-get install -y git cmake make pkg-config
 RUN git clone --depth 1 https://github.com/google/draco draco
 COPY build.sh $SRC/
-COPY fuzz $SRC/fuzz
 WORKDIR $WORK/

projects/draco/build.sh

@@ -15,21 +15,4 @@
 #
 ################################################################################
 
-# build project
-cmake $SRC/draco
-# The draco_decoder and draco_encoder binaries don't build nicely with OSS-Fuzz
-# options, so just build the Draco shared libraries.
-make -j$(nproc) draco
-
-# build fuzzers
-for fuzzer in $(find $SRC/fuzz -name '*.cc'); do
-  fuzzer_basename=$(basename -s .cc $fuzzer)
-  $CXX $CXXFLAGS \
-    -I $SRC/ \
-    -I $SRC/draco/src \
-    -I $WORK/ \
-    $LIB_FUZZING_ENGINE \
-    $fuzzer \
-    $WORK/libdraco.a \
-    -o $OUT/$fuzzer_basename
-done
+sh $SRC/draco/src/draco/tools/fuzz/build.sh

projects/draco/fuzz/draco_decoder_fuzzer.cc

@@ -1,40 +0,0 @@
-// Copyright 2020 Google LLC
-//
-// 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 <fuzzer/FuzzedDataProvider.h>
-
-#include "draco/src/draco/compression/decode.h"
-#include "draco/src/draco/core/decoder_buffer.h"
-#include "draco/src/draco/mesh/mesh.h"
-#include "draco/src/draco/point_cloud/point_cloud.h"
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  draco::DecoderBuffer buffer;
-  buffer.Init(reinterpret_cast<const char *>(data), size);
-
-  // Decode the input data into a geometry. We do not care about the return
-  // value for this test.
-  const auto statusor = draco::Decoder::GetEncodedGeometryType(&buffer);
-  if (!statusor.ok())
-    return 0;
-  const draco::EncodedGeometryType geom_type = statusor.value();
-  draco::Decoder decoder;
-  if (geom_type == draco::TRIANGULAR_MESH) {
-    decoder.DecodeMeshFromBuffer(&buffer);
-  } else if (geom_type == draco::POINT_CLOUD) {
-    decoder.DecodePointCloudFromBuffer(&buffer);
-  }
-
-  return 0;
-}