new files for pathops geometric intersection

tests/PathOpsTSectDebug.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkPathOpsTSect.h"
+
+template<typename TCurve>
+void SkTSect<TCurve>::dump() const {
+    SkDebugf("id=%d", debugID());
+    const SkTSpan<TCurve>* test = fHead;
+    if (!test) {
+        SkDebugf(" (empty)");
+        return;
+    }
+    do {
+        SkDebugf(" ");
+        test->dump(this);
+    } while ((test = test->next()));
+}
+
+template<typename TCurve>
+void SkTSect<TCurve>::dumpBoth(const SkTSect& opp) const {
+    dump();
+    SkDebugf(" ");
+    opp.dump();
+    SkDebugf("\n");
+}
+
+template<typename TCurve>
+void SkTSect<TCurve>::dumpBoth(const SkTSect* opp) const {
+    dumpBoth(*opp);
+}
+
+template<typename TCurve>
+void SkTSect<TCurve>::dumpCurves() const {
+    const SkTSpan<TCurve>* test = fHead;
+    do {
+        test->fPart.dump();
+    } while ((test = test->next()));
+}
+
+#if !DEBUG_T_SECT
+template<typename TCurve>
+int SkTSpan<TCurve>::debugID(const SkTSect<TCurve>* sect) const {
+    if (!sect) {
+        return -1;
+    }
+    int id = 1;
+    const SkTSpan* test = sect->fHead;
+    while (test && test != this) {
+        ++id;
+        test = test->fNext;
+    }
+    return id;
+}
+#endif
+
+template<typename TCurve>
+void SkTSpan<TCurve>::dumpID(const SkTSect<TCurve>* sect) const {
+    if (fCoinStart.isCoincident()) {
+        SkDebugf("%c", '*');
+    }
+    SkDebugf("%d", debugID(sect));
+    if (fCoinEnd.isCoincident()) {
+        SkDebugf("%c", '*');
+    }
+}
+
+template<typename TCurve>
+void SkTSpan<TCurve>::dump(const SkTSect<TCurve>* sect) const {
+    dumpID(sect);
+    SkDebugf("=(%g,%g) [", fStartT, fEndT);
+    for (int index = 0; index < fBounded.count(); ++index) {
+        SkTSpan* span = fBounded[index];
+        span->dumpID(sect);
+        if (index < fBounded.count() - 1) {
+            SkDebugf(",");
+        }
+    }
+    SkDebugf("]");
+}