/*

 * Copyright 2018 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#include "include/core/SkBitmap.h"

#include "include/core/SkCanvas.h"

#include "include/core/SkData.h"

#include "include/core/SkImage.h"

#include "include/core/SkImageFilter.h"

#include "include/core/SkPaint.h"

#include "src/core/SkFontMgrPriv.h"

#include "tools/fonts/TestFontMgr.h"

void FuzzImageFilterDeserialize(sk_sp<SkData> bytes) {

    const int BitmapSize = 24;

    SkBitmap bitmap;

    bitmap.allocN32Pixels(BitmapSize, BitmapSize);

    SkCanvas canvas(bitmap);

    canvas.clear(0x00000000);

    auto flattenable = SkImageFilter::Deserialize(bytes->data(), bytes->size());

    if (flattenable != nullptr) {

        // Let's see if using the filters can cause any trouble...

        SkPaint paint;

        paint.setImageFilter(flattenable);

        canvas.save();

        canvas.clipIRect(bitmap.bounds());

        // This call shouldn't crash or cause ASAN to flag any memory issues

        // If nothing bad happens within this call, everything is fine

        canvas.drawImage(bitmap.asImage(), 0, 0, SkSamplingOptions(), &paint);

        canvas.restore();

    }

}

// TODO(kjlubick): remove IS_FUZZING... after https://crrev.com/c/2410304 lands

#if defined(SK_BUILD_FOR_LIBFUZZER) || defined(IS_FUZZING_WITH_LIBFUZZER)

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

    if (size > 10024) {

        return 0;

    }

    gSkFontMgr_DefaultFactory = &ToolUtils::MakePortableFontMgr;

    auto bytes = SkData::MakeWithoutCopy(data, size);

    FuzzImageFilterDeserialize(bytes);

    return 0;

}

#endif