Switch public fuzz tests to fuzztest.

Change-Id: I75afb65058690585bbf2671c27d6a99a87bcaab7

tests/fuzzer/animation_api_fuzzer.cc

@@ -0,0 +1,91 @@
+// 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_view>
+
+#include "./fuzz_utils.h"
+#include "src/webp/decode.h"
+#include "src/webp/demux.h"
+#include "src/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}));