src/third_party/skia/tests/PathOpsDVectorTest.cpp

   1 /*
   2  * Copyright 2012 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7 #include "PathOpsTestCommon.h"
   8 #include "SkPathOpsPoint.h"
   9 #include "Test.h"
  10
  11 static const SkDPoint tests[] = {
  12     {0, 0},
  13     {1, 0},
  14     {0, 1},
  15     {2, 1},
  16     {1, 2},
  17     {1, 1},
  18     {2, 2}
  19 };
  20
  21 static const size_t tests_count = SK_ARRAY_COUNT(tests);
  22
  23 DEF_TEST(PathOpsDVector, reporter) {
  24     for (size_t index = 0; index < tests_count - 1; ++index) {
  25         SkDVector v1 = tests[index + 1] - tests[index];
  26         SkASSERT(ValidVector(v1));
  27         SkDVector v2 = tests[index] - tests[index + 1];
  28         SkASSERT(ValidVector(v2));
  29         v1 += v2;
  30         REPORTER_ASSERT(reporter, v1.fX == 0 && v1.fY == 0);
  31         SkDPoint p = tests[index + 1] + v2;
  32         REPORTER_ASSERT(reporter, p == tests[index]);
  33         v2 -= v2;
  34         REPORTER_ASSERT(reporter, v2.fX == 0 && v2.fY == 0);
  35         v1 = tests[index + 1] - tests[index];
  36         v1 /= 2;
  37         v1 *= 2;
  38         v1 -= tests[index + 1] - tests[index];
  39         REPORTER_ASSERT(reporter, v1.fX == 0 && v1.fY == 0);
  40         SkVector sv = v1.asSkVector();
  41         REPORTER_ASSERT(reporter, sv.fX == 0 && sv.fY == 0);
  42         v1 = tests[index + 1] - tests[index];
  43         double lenSq = v1.lengthSquared();
  44         double v1Dot = v1.dot(v1);
  45         REPORTER_ASSERT(reporter, lenSq == v1Dot);
  46         REPORTER_ASSERT(reporter, approximately_equal(sqrt(lenSq), v1.length()));
  47         double v1Cross = v1.cross(v1);
  48         REPORTER_ASSERT(reporter, v1Cross == 0);
  49     }
  50 }