pathops version two

tests/PathOpsLineIntersectionTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "PathOpsTestCommon.h"
 #include "SkIntersections.h"
 #include "SkPathOpsLine.h"
 #include "Test.h"
 
 // FIXME: add tests for intersecting, non-intersecting, degenerate, coincident
 static const SkDLine tests[][2] = {
+{{{{0.00010360032320022583, 1.0172703415155411}, {0.00014114845544099808, 1.0200891587883234}}},
+ {{{0.00010259449481964111, 1.017270140349865}, {0.00018215179443359375, 1.022890567779541}}}},
+
 #if 0
     // these do intersect at a pair of points, but not close enough for check results liking
     {{{{365.848175,5081.15186}, {368,5103}}}, {{{367.967712,5102.61084}, {368.278717,5105.71045}}}},
 #endif
     {{{{30,20}, {30,50}}}, {{{24,30}, {36,30}}}},
     {{{{323,193}, {-317,193}}}, {{{0,994}, {0,0}}}},
     {{{{90,230}, {160,60}}}, {{{60,120}, {260,120}}}},
     {{{{90,230}, {160,60}}}, {{{181.176468,120}, {135.294128,120}}}},
     {{{{181.1764678955078125f, 120}, {186.3661956787109375f, 134.7042236328125f}}},
      {{{175.8309783935546875f, 141.5211334228515625f}, {187.8782806396484375f, 133.7258148193359375f}}}},
@@ skipping 51 matching lines @@
     {{{{186.3661956787109375f, 134.7042236328125f}, {187.8782806396484375f, 133.7258148193359375f}}},
      {{{175.8309783935546875f, 141.5211334228515625f}, {187.8782806396484375f, 133.7258148193359375f}}}},
 
     {{{{235.681549, 531.000000}, {280.318420, 321.000000}}},
      {{{286.695129, 291.000000}, {229.304855, 561.000000}}}},
 };
 
 static const size_t coincidentTests_count = SK_ARRAY_COUNT(coincidentTests);
 
 static void check_results(skiatest::Reporter* reporter, const SkDLine& line1, const SkDLine& line2,
-                          const SkIntersections& ts) {
+                          const SkIntersections& ts, bool nearAllowed) {
     for (int i = 0; i < ts.used(); ++i) {
         SkDPoint result1 = line1.ptAtT(ts[0][i]);
         SkDPoint result2 = line2.ptAtT(ts[1][i]);
+        if (nearAllowed && result1.roughlyEqual(result2)) {
+            continue;
+        }
         if (!result1.approximatelyEqual(result2) && !ts.nearlySame(i)) {
             REPORTER_ASSERT(reporter, ts.used() != 1);
             result2 = line2.ptAtT(ts[1][i ^ 1]);
             if (!result1.approximatelyEqual(result2)) {
                 SkDebugf(".");
             }
             REPORTER_ASSERT(reporter, result1.approximatelyEqual(result2));
             REPORTER_ASSERT(reporter, result1.approximatelyEqual(ts.pt(i).asSkPoint()));
         }
     }
 }
 
-static void testOne(skiatest::Reporter* reporter, const SkDLine& line1, const SkDLine& line2) {
+static void testOne(skiatest::Reporter* reporter, const SkDLine& line1, const SkDLine& line2,
+        bool nearAllowed) {
     SkASSERT(ValidLine(line1));
     SkASSERT(ValidLine(line2));
     SkIntersections i;
+    i.allowNear(nearAllowed);
     int pts = i.intersect(line1, line2);
     REPORTER_ASSERT(reporter, pts);
     REPORTER_ASSERT(reporter, pts == i.used());
-    check_results(reporter, line1, line2, i);
+    check_results(reporter, line1, line2, i, nearAllowed);
     if (line1[0] == line1[1] || line2[0] == line2[1]) {
         return;
     }
     if (line1[0].fY == line1[1].fY) {
         double left = SkTMin(line1[0].fX, line1[1].fX);
         double right = SkTMax(line1[0].fX, line1[1].fX);
         SkIntersections ts;
         ts.horizontal(line2, left, right, line1[0].fY, line1[0].fX != left);
-        check_results(reporter, line2, line1, ts);
+        check_results(reporter, line2, line1, ts, nearAllowed);
     }
     if (line2[0].fY == line2[1].fY) {
         double left = SkTMin(line2[0].fX, line2[1].fX);
         double right = SkTMax(line2[0].fX, line2[1].fX);
         SkIntersections ts;
         ts.horizontal(line1, left, right, line2[0].fY, line2[0].fX != left);
-        check_results(reporter, line1, line2, ts);
+        check_results(reporter, line1, line2, ts, nearAllowed);
     }
     if (line1[0].fX == line1[1].fX) {
         double top = SkTMin(line1[0].fY, line1[1].fY);
         double bottom = SkTMax(line1[0].fY, line1[1].fY);
         SkIntersections ts;
         ts.vertical(line2, top, bottom, line1[0].fX, line1[0].fY != top);
-        check_results(reporter, line2, line1, ts);
+        check_results(reporter, line2, line1, ts, nearAllowed);
     }
     if (line2[0].fX == line2[1].fX) {
         double top = SkTMin(line2[0].fY, line2[1].fY);
         double bottom = SkTMax(line2[0].fY, line2[1].fY);
         SkIntersections ts;
         ts.vertical(line1, top, bottom, line2[0].fX, line2[0].fY != top);
-        check_results(reporter, line1, line2, ts);
+        check_results(reporter, line1, line2, ts, nearAllowed);
     }
     reporter->bumpTestCount();
 }
 
 static void testOneCoincident(skiatest::Reporter* reporter, const SkDLine& line1,
                               const SkDLine& line2) {
     SkASSERT(ValidLine(line1));
     SkASSERT(ValidLine(line2));
     SkIntersections ts;
     int pts = ts.intersect(line1, line2);
     REPORTER_ASSERT(reporter, pts == 2);
     REPORTER_ASSERT(reporter, pts == ts.used());
-    check_results(reporter, line1, line2, ts);
+    check_results(reporter, line1, line2, ts, false);
     if (line1[0] == line1[1] || line2[0] == line2[1]) {
         return;
     }
     if (line1[0].fY == line1[1].fY) {
         double left = SkTMin(line1[0].fX, line1[1].fX);
         double right = SkTMax(line1[0].fX, line1[1].fX);
         SkIntersections ts;
         ts.horizontal(line2, left, right, line1[0].fY, line1[0].fX != left);
         REPORTER_ASSERT(reporter, pts == 2);
         REPORTER_ASSERT(reporter, pts == ts.used());
-        check_results(reporter, line2, line1, ts);
+        check_results(reporter, line2, line1, ts, false);
     }
     if (line2[0].fY == line2[1].fY) {
         double left = SkTMin(line2[0].fX, line2[1].fX);
         double right = SkTMax(line2[0].fX, line2[1].fX);
         SkIntersections ts;
         ts.horizontal(line1, left, right, line2[0].fY, line2[0].fX != left);
         REPORTER_ASSERT(reporter, pts == 2);
         REPORTER_ASSERT(reporter, pts == ts.used());
-        check_results(reporter, line1, line2, ts);
+        check_results(reporter, line1, line2, ts, false);
     }
     if (line1[0].fX == line1[1].fX) {
         double top = SkTMin(line1[0].fY, line1[1].fY);
         double bottom = SkTMax(line1[0].fY, line1[1].fY);
         SkIntersections ts;
         ts.vertical(line2, top, bottom, line1[0].fX, line1[0].fY != top);
         REPORTER_ASSERT(reporter, pts == 2);
         REPORTER_ASSERT(reporter, pts == ts.used());
-        check_results(reporter, line2, line1, ts);
+        check_results(reporter, line2, line1, ts, false);
     }
     if (line2[0].fX == line2[1].fX) {
         double top = SkTMin(line2[0].fY, line2[1].fY);
         double bottom = SkTMax(line2[0].fY, line2[1].fY);
         SkIntersections ts;
         ts.vertical(line1, top, bottom, line2[0].fX, line2[0].fY != top);
         REPORTER_ASSERT(reporter, pts == 2);
         REPORTER_ASSERT(reporter, pts == ts.used());
-        check_results(reporter, line1, line2, ts);
+        check_results(reporter, line1, line2, ts, false);
     }
     reporter->bumpTestCount();
 }
 
 DEF_TEST(PathOpsLineIntersection, reporter) {
     size_t index;
     for (index = 0; index < coincidentTests_count; ++index) {
         const SkDLine& line1 = coincidentTests[index][0];
         const SkDLine& line2 = coincidentTests[index][1];
         testOneCoincident(reporter, line1, line2);
     }
     for (index = 0; index < tests_count; ++index) {
         const SkDLine& line1 = tests[index][0];
         const SkDLine& line2 = tests[index][1];
-        testOne(reporter, line1, line2);
+        testOne(reporter, line1, line2, true);
     }
     for (index = 0; index < noIntersect_count; ++index) {
         const SkDLine& line1 = noIntersect[index][0];
         const SkDLine& line2 = noIntersect[index][1];
         SkIntersections ts;
         int pts = ts.intersect(line1, line2);
         REPORTER_ASSERT(reporter, !pts);
         REPORTER_ASSERT(reporter, pts == ts.used());
         reporter->bumpTestCount();
     }
 }
 
 DEF_TEST(PathOpsLineIntersectionOneOff, reporter) {
     int index = 0;
     SkASSERT(index < (int) tests_count);
-    testOne(reporter, tests[index][0], tests[index][1]);
-    testOne(reporter, tests[1][0], tests[1][1]);
+    testOne(reporter, tests[index][0], tests[index][1], true);
+}
+
+DEF_TEST(PathOpsLineIntersectionExactOneOff, reporter) {
+    int index = 0;
+    SkASSERT(index < (int) tests_count);
+    testOne(reporter, tests[index][0], tests[index][1], false);
 }
 
 DEF_TEST(PathOpsLineIntersectionOneCoincident, reporter) {
     int index = 0;
     SkASSERT(index < (int) coincidentTests_count);
     const SkDLine& line1 = coincidentTests[index][0];
     const SkDLine& line2 = coincidentTests[index][1];
     testOneCoincident(reporter, line1, line2);
 }