Add base types for path ops

src/pathops/SkPathOpsBounds.cpp

Index: src/pathops/SkPathOpsBounds.cpp
===================================================================
--- src/pathops/SkPathOpsBounds.cpp	(revision 0)
+++ src/pathops/SkPathOpsBounds.cpp	(revision 0)
@@ -0,0 +1,40 @@
+/*
+ * 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 "SkPathOpsBounds.h"
+#include "SkPathOpsCubic.h"
+#include "SkPathOpsLine.h"
+#include "SkPathOpsQuad.h"
+
+void SkPathOpsBounds::setCubicBounds(const SkPoint a[4]) {
+    SkDCubic cubic;
+    cubic.set(a);
+    SkDRect dRect;
+    dRect.setBounds(cubic);
+    set(SkDoubleToScalar(dRect.fLeft), SkDoubleToScalar(dRect.fTop),
+            SkDoubleToScalar(dRect.fRight), SkDoubleToScalar(dRect.fBottom));
+}
+
+void SkPathOpsBounds::setLineBounds(const SkPoint a[2]) {
+    setPointBounds(a[0]);
+    add(a[1]);
+}
+
+void SkPathOpsBounds::setQuadBounds(const SkPoint a[3]) {
+    SkDQuad quad;
+    quad.set(a);
+    SkDRect dRect;
+    dRect.setBounds(quad);
+    set(SkDoubleToScalar(dRect.fLeft), SkDoubleToScalar(dRect.fTop),
+            SkDoubleToScalar(dRect.fRight), SkDoubleToScalar(dRect.fBottom));
+}
+
+void (SkPathOpsBounds::*SetCurveBounds[])(const SkPoint[]) = {
+    NULL,
+    &SkPathOpsBounds::setLineBounds,
+    &SkPathOpsBounds::setQuadBounds,
+    &SkPathOpsBounds::setCubicBounds
+};