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- /*
- * Copyright 2017 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "src/utils/SkPolyUtils.h"
- #include "tests/Test.h"
- DEF_TEST(OffsetSimplePoly, reporter) {
- SkTDArray<SkPoint> rrectPoly;
- ///////////////////////////////////////////////////////////////////////
- // Try convex tests first
- // round rect
- *rrectPoly.push() = SkPoint::Make(-100, 55);
- *rrectPoly.push() = SkPoint::Make(100, 55);
- *rrectPoly.push() = SkPoint::Make(100 + 2.5f, 50 + 4.330127f);
- *rrectPoly.push() = SkPoint::Make(100 + 3.535534f, 50 + 3.535534f);
- *rrectPoly.push() = SkPoint::Make(100 + 4.330127f, 50 + 2.5f);
- *rrectPoly.push() = SkPoint::Make(105, 50);
- *rrectPoly.push() = SkPoint::Make(105, -50);
- *rrectPoly.push() = SkPoint::Make(100 + 4.330127f, -50 - 2.5f);
- *rrectPoly.push() = SkPoint::Make(100 + 3.535534f, -50 - 3.535534f);
- *rrectPoly.push() = SkPoint::Make(100 + 2.5f, -50 - 4.330127f);
- *rrectPoly.push() = SkPoint::Make(100, -55);
- *rrectPoly.push() = SkPoint::Make(-100, -55);
- *rrectPoly.push() = SkPoint::Make(-100 - 2.5f, -50 - 4.330127f);
- *rrectPoly.push() = SkPoint::Make(-100 - 3.535534f, -50 - 3.535534f);
- *rrectPoly.push() = SkPoint::Make(-100 - 4.330127f, -50 - 2.5f);
- *rrectPoly.push() = SkPoint::Make(-105, -50);
- *rrectPoly.push() = SkPoint::Make(-105, 50);
- *rrectPoly.push() = SkPoint::Make(-100 - 4.330127f, 50 + 2.5f);
- *rrectPoly.push() = SkPoint::Make(-100 - 3.535534f, 50 + 3.535534f);
- *rrectPoly.push() = SkPoint::Make(-100 - 2.5f, 50 + 4.330127f);
- SkRect bounds;
- bounds.setBoundsCheck(rrectPoly.begin(), rrectPoly.count());
- REPORTER_ASSERT(reporter, SkIsConvexPolygon(rrectPoly.begin(), rrectPoly.count()));
- // inset a little
- SkTDArray<SkPoint> offsetPoly;
- bool result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), bounds, 3,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count()));
- // inset to rect
- result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), bounds, 10, &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count()));
- REPORTER_ASSERT(reporter, offsetPoly.count() == 4);
- if (offsetPoly.count() == 4) {
- REPORTER_ASSERT(reporter, offsetPoly[0].equals(-95, 45));
- REPORTER_ASSERT(reporter, offsetPoly[1].equals(95, 45));
- REPORTER_ASSERT(reporter, offsetPoly[2].equals(95, -45));
- REPORTER_ASSERT(reporter, offsetPoly[3].equals(-95, -45));
- }
- // just to full inset
- // fails, but outputs a line segment
- result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), bounds, 55, &offsetPoly);
- REPORTER_ASSERT(reporter, !result);
- REPORTER_ASSERT(reporter, !SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count()));
- REPORTER_ASSERT(reporter, offsetPoly.count() == 2);
- if (offsetPoly.count() == 2) {
- REPORTER_ASSERT(reporter, offsetPoly[0].equals(-50, 0));
- REPORTER_ASSERT(reporter, offsetPoly[1].equals(50, 0));
- }
- // past full inset
- result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), bounds, 75, &offsetPoly);
- REPORTER_ASSERT(reporter, !result);
- // troublesome case
- SkTDArray<SkPoint> clippedRRectPoly;
- *clippedRRectPoly.push() = SkPoint::Make(335.928101f, 428.219055f);
- *clippedRRectPoly.push() = SkPoint::Make(330.414459f, 423.034912f);
- *clippedRRectPoly.push() = SkPoint::Make(325.749084f, 417.395508f);
- *clippedRRectPoly.push() = SkPoint::Make(321.931946f, 411.300842f);
- *clippedRRectPoly.push() = SkPoint::Make(318.963074f, 404.750977f);
- *clippedRRectPoly.push() = SkPoint::Make(316.842468f, 397.745850f);
- *clippedRRectPoly.push() = SkPoint::Make(315.570068f, 390.285522f);
- *clippedRRectPoly.push() = SkPoint::Make(315.145966f, 382.369965f);
- *clippedRRectPoly.push() = SkPoint::Make(315.570068f, 374.454346f);
- *clippedRRectPoly.push() = SkPoint::Make(316.842468f, 366.994019f);
- *clippedRRectPoly.push() = SkPoint::Make(318.963074f, 359.988892f);
- *clippedRRectPoly.push() = SkPoint::Make(321.931946f, 353.439056f);
- *clippedRRectPoly.push() = SkPoint::Make(325.749084f, 347.344421f);
- *clippedRRectPoly.push() = SkPoint::Make(330.414459f, 341.705017f);
- *clippedRRectPoly.push() = SkPoint::Make(335.928101f, 336.520813f);
- *clippedRRectPoly.push() = SkPoint::Make(342.289948f, 331.791901f);
- *clippedRRectPoly.push() = SkPoint::Make(377.312134f, 331.791901f);
- *clippedRRectPoly.push() = SkPoint::Make(381.195313f, 332.532593f);
- *clippedRRectPoly.push() = SkPoint::Make(384.464935f, 334.754700f);
- *clippedRRectPoly.push() = SkPoint::Make(386.687042f, 338.024292f);
- *clippedRRectPoly.push() = SkPoint::Make(387.427765f, 341.907532f);
- *clippedRRectPoly.push() = SkPoint::Make(387.427765f, 422.832367f);
- *clippedRRectPoly.push() = SkPoint::Make(386.687042f, 426.715576f);
- *clippedRRectPoly.push() = SkPoint::Make(384.464935f, 429.985168f);
- *clippedRRectPoly.push() = SkPoint::Make(381.195313f, 432.207275f);
- *clippedRRectPoly.push() = SkPoint::Make(377.312134f, 432.947998f);
- *clippedRRectPoly.push() = SkPoint::Make(342.289948f, 432.947998f);
- bounds.setBoundsCheck(clippedRRectPoly.begin(), clippedRRectPoly.count());
- REPORTER_ASSERT(reporter, SkIsConvexPolygon(clippedRRectPoly.begin(),
- clippedRRectPoly.count()));
- result = SkOffsetSimplePolygon(clippedRRectPoly.begin(), clippedRRectPoly.count(), bounds,
- 32.3699417f, &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count()));
- ////////////////////////////////////////////////////////////////////////////////
- // Concave tests
- SkTDArray<SkPoint> starPoly;
- *starPoly.push() = SkPoint::Make(0.0f, -50.0f);
- *starPoly.push() = SkPoint::Make(14.43f, -25.0f);
- *starPoly.push() = SkPoint::Make(43.30f, -25.0f);
- *starPoly.push() = SkPoint::Make(28.86f, 0.0f);
- *starPoly.push() = SkPoint::Make(43.30f, 25.0f);
- *starPoly.push() = SkPoint::Make(14.43f, 25.0f);
- *starPoly.push() = SkPoint::Make(0.0f, 50.0f);
- *starPoly.push() = SkPoint::Make(-14.43f, 25.0f);
- *starPoly.push() = SkPoint::Make(-43.30f, 25.0f);
- *starPoly.push() = SkPoint::Make(-28.86f, 0.0f);
- *starPoly.push() = SkPoint::Make(-43.30f, -25.0f);
- *starPoly.push() = SkPoint::Make(-14.43f, -25.0f);
- bounds.setBoundsCheck(starPoly.begin(), starPoly.count());
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(starPoly.begin(), starPoly.count()));
- // try a variety of distances
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, 0.1f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, 5.665f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, 28,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- // down to a point
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, 28.866f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, !result);
- // and past
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, 50.5f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, !result);
- // and now out
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, -0.1f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, -5.6665f,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, -50,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), bounds, -100,
- &offsetPoly);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count()));
- SkTDArray<SkPoint> intersectingPoly;
- *intersectingPoly.push() = SkPoint::Make(0.0f, -50.0f);
- *intersectingPoly.push() = SkPoint::Make(14.43f, -25.0f);
- *intersectingPoly.push() = SkPoint::Make(43.30f, -25.0f);
- *intersectingPoly.push() = SkPoint::Make(-28.86f, 0.0f);
- *intersectingPoly.push() = SkPoint::Make(43.30f, 25.0f);
- *intersectingPoly.push() = SkPoint::Make(14.43f, 25.0f);
- *intersectingPoly.push() = SkPoint::Make(0.0f, 50.0f);
- *intersectingPoly.push() = SkPoint::Make(-14.43f, 25.0f);
- *intersectingPoly.push() = SkPoint::Make(-43.30f, 25.0f);
- *intersectingPoly.push() = SkPoint::Make(28.86f, 0.0f);
- *intersectingPoly.push() = SkPoint::Make(-43.30f, -25.0f);
- *intersectingPoly.push() = SkPoint::Make(-14.43f, -25.0f);
- // SkOffsetSimplePolygon now assumes that the input is simple, so we'll just check for that
- result = SkIsSimplePolygon(intersectingPoly.begin(), intersectingPoly.count());
- REPORTER_ASSERT(reporter, !result);
- }
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