62bb436301
Bug: oss-fuzz:43699 Change-Id: Ie856aed03b513a4ea84a09deda6a05b95b086b07 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/496876 Reviewed-by: Michael Ludwig <michaelludwig@google.com> Commit-Queue: Jim Van Verth <jvanverth@google.com>
60 lines
1.8 KiB
C++
60 lines
1.8 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/private/SkTemplates.h"
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#include "src/utils/SkPolyUtils.h"
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void inline ignoreResult(bool ) {}
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// clamps the point to the nearest 16th of a pixel
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static SkPoint sanitize_point(const SkPoint& in) {
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SkPoint out;
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out.fX = SkScalarRoundToScalar(16.f*in.fX)*0.0625f;
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out.fY = SkScalarRoundToScalar(16.f*in.fY)*0.0625f;
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return out;
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}
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DEF_FUZZ(PolyUtils, fuzz) {
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int count;
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fuzz->nextRange(&count, 0, 512);
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SkAutoSTMalloc<64, SkPoint> polygon(count);
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for (int index = 0; index < count; ++index) {
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fuzz->next(&polygon[index].fX, &polygon[index].fY);
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polygon[index] = sanitize_point(polygon[index]);
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}
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SkRect bounds;
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bounds.setBoundsCheck(polygon, count);
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ignoreResult(SkGetPolygonWinding(polygon, count));
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bool isConvex = SkIsConvexPolygon(polygon, count);
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bool isSimple = SkIsSimplePolygon(polygon, count);
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SkTDArray<SkPoint> output;
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if (isConvex) {
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SkScalar inset;
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fuzz->next(&inset);
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ignoreResult(SkInsetConvexPolygon(polygon, count, inset, &output));
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}
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if (isSimple) {
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SkScalar offset;
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// Limit this to prevent timeouts.
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// This should be fine, as this is roughly the range we expect from the shadow algorithm.
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fuzz->nextRange(&offset, -1000, 1000);
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ignoreResult(SkOffsetSimplePolygon(polygon, count, bounds, offset, &output));
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SkAutoSTMalloc<64, uint16_t> indexMap(count);
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for (int index = 0; index < count; ++index) {
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fuzz->next(&indexMap[index]);
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}
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SkTDArray<uint16_t> outputIndices;
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ignoreResult(SkTriangulateSimplePolygon(polygon, indexMap, count, &outputIndices));
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}
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}
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