c0bd9f9fe5
Current strategy: everything from the top
Things to look at first are the manual changes:
- added tools/rewrite_includes.py
- removed -Idirectives from BUILD.gn
- various compile.sh simplifications
- tweak tools/embed_resources.py
- update gn/find_headers.py to write paths from the top
- update gn/gn_to_bp.py SkUserConfig.h layout
so that #include "include/config/SkUserConfig.h" always
gets the header we want.
No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
119 lines
3.5 KiB
C++
119 lines
3.5 KiB
C++
/*
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* Copyright 2018 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "fuzz/Fuzz.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkPixmap.h"
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#include "include/encode/SkJpegEncoder.h"
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#include "include/encode/SkPngEncoder.h"
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#include "include/encode/SkWebpEncoder.h"
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#include "include/utils/SkRandom.h"
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#include "src/core/SkOSFile.h"
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#include <vector>
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// These values were picked arbitrarily to hopefully limit the size of the
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// serialized SkPixmaps.
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constexpr int MAX_WIDTH = 512;
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constexpr int MAX_HEIGHT = 512;
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static SkBitmap make_fuzzed_bitmap(Fuzz* fuzz) {
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SkBitmap bm;
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uint32_t w, h;
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fuzz->nextRange(&w, 1, MAX_WIDTH);
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fuzz->nextRange(&h, 1, MAX_HEIGHT);
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if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(w, h))) {
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return bm;
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}
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uint32_t n = w * h;
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fuzz->nextN((SkPMColor*)bm.getPixels(), n);
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return bm;
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}
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DEF_FUZZ(PNGEncoder, fuzz) {
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auto bm = make_fuzzed_bitmap(fuzz);
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auto opts = SkPngEncoder::Options{};
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fuzz->nextRange(&opts.fZLibLevel, 0, 9);
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SkDynamicMemoryWStream dest;
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SkPngEncoder::Encode(&dest, bm.pixmap(), opts);
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}
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DEF_FUZZ(JPEGEncoder, fuzz) {
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auto bm = make_fuzzed_bitmap(fuzz);
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auto opts = SkJpegEncoder::Options{};
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fuzz->nextRange(&opts.fQuality, 0, 100);
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SkDynamicMemoryWStream dest;
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(void)SkJpegEncoder::Encode(&dest, bm.pixmap(), opts);
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}
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DEF_FUZZ(WEBPEncoder, fuzz) {
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auto bm = make_fuzzed_bitmap(fuzz);
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auto opts = SkWebpEncoder::Options{};
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fuzz->nextRange(&opts.fQuality, 0.0f, 100.0f);
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bool lossy;
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fuzz->next(&lossy);
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if (lossy) {
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opts.fCompression = SkWebpEncoder::Compression::kLossy;
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} else {
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opts.fCompression = SkWebpEncoder::Compression::kLossless;
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}
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SkDynamicMemoryWStream dest;
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(void)SkWebpEncoder::Encode(&dest, bm.pixmap(), opts);
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}
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// Not a real fuzz endpoint, but a helper to take in real, good images
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// and dump out a corpus for this fuzzer.
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DEF_FUZZ(_MakeEncoderCorpus, fuzz) {
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auto bytes = fuzz->fBytes;
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SkDebugf("bytes %d\n", bytes->size());
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auto img = SkImage::MakeFromEncoded(bytes);
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if (nullptr == img.get()) {
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SkDebugf("invalid image, could not decode\n");
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return;
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}
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if (img->width() > MAX_WIDTH || img->height() > MAX_HEIGHT) {
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SkDebugf("Too big (%d x %d)\n", img->width(), img->height());
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return;
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}
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std::vector<int32_t> dstPixels;
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int rowBytes = img->width() * 4;
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dstPixels.resize(img->height() * rowBytes);
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SkPixmap pm(SkImageInfo::MakeN32Premul(img->width(), img->height()),
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&dstPixels.front(), rowBytes);
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if (!img->readPixels(pm, 0, 0)) {
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SkDebugf("Could not read pixmap\n");
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return;
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}
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SkString s("./encoded_corpus/enc_");
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static SkRandom rand;
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s.appendU32(rand.nextU());
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auto file = sk_fopen(s.c_str(), SkFILE_Flags::kWrite_SkFILE_Flag);
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if (!file) {
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SkDebugf("Can't initialize file\n");
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return;
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}
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auto total = pm.info().bytesPerPixel() * pm.width() * pm.height();
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SkDebugf("Writing %d (%d x %d) bytes\n", total, pm.width(), pm.height());
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// Write out the size in two bytes since that's what the fuzzer will
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// read first.
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uint32_t w = pm.width();
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sk_fwrite(&w, sizeof(uint32_t), file);
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uint32_t h = pm.height();
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sk_fwrite(&h, sizeof(uint32_t), file);
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sk_fwrite(pm.addr(), total, file);
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sk_fclose(file);
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}
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