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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "Test.h"
      9 #include "SkGeometry.h"
     10 
     11 static bool nearly_equal(const SkPoint& a, const SkPoint& b) {
     12     return SkScalarNearlyEqual(a.fX, b.fX) && SkScalarNearlyEqual(a.fY, b.fY);
     13 }
     14 
     15 static void testChopCubic(skiatest::Reporter* reporter) {
     16     /*
     17         Inspired by this test, which used to assert that the tValues had dups
     18 
     19         <path stroke="#202020" d="M0,0 C0,0 1,1 2190,5130 C2190,5070 2220,5010 2205,4980" />
     20      */
     21     const SkPoint src[] = {
     22         { SkIntToScalar(2190), SkIntToScalar(5130) },
     23         { SkIntToScalar(2190), SkIntToScalar(5070) },
     24         { SkIntToScalar(2220), SkIntToScalar(5010) },
     25         { SkIntToScalar(2205), SkIntToScalar(4980) },
     26     };
     27     SkPoint dst[13];
     28     SkScalar tValues[3];
     29     // make sure we don't assert internally
     30     int count = SkChopCubicAtMaxCurvature(src, dst, tValues);
     31     if (false) { // avoid bit rot, suppress warning
     32         REPORTER_ASSERT(reporter, count);
     33     }
     34 }
     35 
     36 
     37 static void TestGeometry(skiatest::Reporter* reporter) {
     38     SkPoint pts[3], dst[5];
     39 
     40     pts[0].set(0, 0);
     41     pts[1].set(100, 50);
     42     pts[2].set(0, 100);
     43 
     44     int count = SkChopQuadAtMaxCurvature(pts, dst);
     45     REPORTER_ASSERT(reporter, count == 1 || count == 2);
     46 
     47     pts[0].set(0, 0);
     48     pts[1].set(SkIntToScalar(3), 0);
     49     pts[2].set(SkIntToScalar(3), SkIntToScalar(3));
     50     SkConvertQuadToCubic(pts, dst);
     51     const SkPoint cubic[] = {
     52         { 0, 0, },
     53         { SkIntToScalar(2), 0, },
     54         { SkIntToScalar(3), SkIntToScalar(1), },
     55         { SkIntToScalar(3), SkIntToScalar(3) },
     56     };
     57     for (int i = 0; i < 4; ++i) {
     58         REPORTER_ASSERT(reporter, nearly_equal(cubic[i], dst[i]));
     59     }
     60 
     61     testChopCubic(reporter);
     62 }
     63 
     64 #include "TestClassDef.h"
     65 DEFINE_TESTCLASS("Geometry", GeometryTestClass, TestGeometry)
     66