FuzzSVG.cpp

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/*
 * Copyright 2020 Google, LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#include "include/core/SkStream.h"
#include "include/core/SkSurface.h"
#include "modules/skshaper/utils/FactoryHelpers.h"
#include "modules/svg/include/SkSVGDOM.h"
#include "modules/svg/include/SkSVGNode.h"
#include "tools/fonts/TestFontMgr.h"
 
#if defined(SK_ENABLE_SVG)
 
void FuzzSVG(const uint8_t *data, size_t size) {
    uint8_t w = 100;
    uint8_t h = 200;
 
    SkMemoryStream stream(data, size);
    sk_sp<SkSVGDOM> dom = SkSVGDOM::Builder()
                                  .setFontManager(ToolUtils::MakePortableFontMgr())
                                  .setTextShapingFactory(SkShapers::BestAvailable())
                                  .make(stream);
    if (!dom) {
        return;
    }
 
    auto s = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(128, 128));
    if (!s) {
        return;
    }
    SkSize winSize = SkSize::Make(w, h);
    dom->setContainerSize(winSize);
    dom->containerSize();
    dom->render(s->getCanvas());
}
 
#if defined(SK_BUILD_FOR_LIBFUZZER)
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
    if (size > 30000) {
        return 0;
    }
    FuzzSVG(data, size);
    return 0;
}
#endif
 
#endif // SK_ENABLE_SVG