Draco integration (#3951)

projects/draco/Dockerfile

@@ -0,0 +1,22 @@
+# Copyright 2020 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.
+#
+################################################################################
+
+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

@@ -0,0 +1,35 @@
+#!/bin/bash -eu
+# Copyright 2020 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.
+#
+################################################################################
+
+# 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

projects/draco/fuzz/draco_decoder_fuzzer.cc

@@ -0,0 +1,40 @@
+// 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;
+}

projects/draco/project.yaml

@@ -0,0 +1,3 @@
+homepage: "https://github.com/google/draco"
+language: c++
+primary_contact: "fgalligan@google.com"