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// Copyright 2024 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 <cstdlib>
#include <iostream>
#include <string>
#include <string_view>
#include "imageio/image_dec.h"
#include "src/dsp/cpu.h"
#include "src/webp/decode.h"
#include "src/webp/encode.h"
#include "src/webp/types.h"
#include "tests/fuzzer/fuzz_utils.h"
namespace {
const VP8CPUInfo default_VP8GetCPUInfo = fuzz_utils::VP8GetCPUInfo;
void EncTest(std::string_view file, uint32_t optimization_index, bool use_argb,
WebPConfig config,
const fuzz_utils::CropOrScaleParams& crop_or_scale_params) {
fuzz_utils::SetOptimization(default_VP8GetCPUInfo, optimization_index);
// Init the source picture.
WebPPicture pic;
if (!WebPPictureInit(&pic)) {
std::cerr << "WebPPictureInit failed.\n";
abort();
}
pic.use_argb = use_argb;
const uint8_t* const file_data =
reinterpret_cast<const uint8_t*>(file.data());
if (fuzz_utils::IsImageTooBig(file_data, file.size())) return;
WebPImageReader reader = WebPGuessImageReader(file_data, file.size());
if (!reader(file_data, file.size(), &pic, 1, NULL)) return;
// Crop and scale.
if (!CropOrScale(&pic, crop_or_scale_params)) {
const WebPEncodingError error_code = pic.error_code;
WebPPictureFree(&pic);
if (error_code == VP8_ENC_ERROR_OUT_OF_MEMORY) return;
std::cerr << "CropOrScale failed. Error code: " << error_code << "\n";
abort();
}
// Skip the cruncher except on small images, it's likely to timeout.
if (config.lossless && config.quality == 100. && config.method == 6 &&
pic.width * pic.height >= 16384) {
config.lossless = 0;
}
// Encode.
WebPMemoryWriter memory_writer;
WebPMemoryWriterInit(&memory_writer);
pic.writer = WebPMemoryWrite;
pic.custom_ptr = &memory_writer;
if (!WebPEncode(&config, &pic)) {
const WebPEncodingError error_code = pic.error_code;
WebPMemoryWriterClear(&memory_writer);
WebPPictureFree(&pic);
if (error_code == VP8_ENC_ERROR_OUT_OF_MEMORY) return;
std::cerr << "WebPEncode failed. Error code: " << error_code
<< " \nFile starts with: " << file.substr(0, 20) << "\n";
abort();
}
// Try decoding the result.
int w, h;
const uint8_t* const out_data = memory_writer.mem;
const size_t out_size = memory_writer.size;
uint8_t* const rgba = WebPDecodeBGRA(out_data, out_size, &w, &h);
if (rgba == nullptr || w != pic.width || h != pic.height) {
std::cerr << "WebPDecodeBGRA failed.\nFile starts with: "
<< file.substr(0, 20) << "\n";
WebPFree(rgba);
WebPMemoryWriterClear(&memory_writer);
WebPPictureFree(&pic);
abort();
}
// Compare the results if exact encoding.
if (pic.use_argb && config.lossless && config.near_lossless == 100) {
const uint32_t* src1 = (const uint32_t*)rgba;
const uint32_t* src2 = pic.argb;
for (int y = 0; y < h; ++y, src1 += w, src2 += pic.argb_stride) {
for (int x = 0; x < w; ++x) {
uint32_t v1 = src1[x], v2 = src2[x];
if (!config.exact) {
if ((v1 & 0xff000000u) == 0 || (v2 & 0xff000000u) == 0) {
// Only keep alpha for comparison of fully transparent area.
v1 &= 0xff000000u;
v2 &= 0xff000000u;
}
}
if (v1 != v2) {
std::cerr
<< "Lossless compression failed pixel-exactness.\nFile starts "
"with: "
<< file.substr(0, 20) << "\n";
WebPFree(rgba);
WebPMemoryWriterClear(&memory_writer);
WebPPictureFree(&pic);
abort();
}
}
}
}
WebPFree(rgba);
WebPMemoryWriterClear(&memory_writer);
WebPPictureFree(&pic);
}
} // namespace
FUZZ_TEST(Enc, EncTest)
.WithDomains(
fuzztest::Arbitrary<std::string>(),
/*optimization_index=*/
fuzztest::InRange<uint32_t>(0, fuzz_utils::kMaxOptimizationIndex),
/*use_argb=*/fuzztest::Arbitrary<bool>(),
fuzz_utils::ArbitraryWebPConfig(),
fuzz_utils::ArbitraryCropOrScaleParams());
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