add asserts to point<-->verb helpers

src/core/SkEdgeBuilder.cpp

Index: src/core/SkEdgeBuilder.cpp
diff --git a/src/core/SkEdgeBuilder.cpp b/src/core/SkEdgeBuilder.cpp
index 608a83c7c73ff8d9cf6622b5f5e58dc01889b5e0..9ac4e9744394d8164cf03c22d5b257a1b2de6ab5 100644
--- a/src/core/SkEdgeBuilder.cpp
+++ b/src/core/SkEdgeBuilder.cpp
@@ -153,12 +153,22 @@ int SkEdgeBuilder::buildPoly(const SkPath& path, const SkIRect* iclip,
     return edgePtr - fEdgeList;
 }
 
+static void handle_quad(SkEdgeBuilder* builder, const SkPoint pts[3]) {
+    SkPoint monoX[5];
+    int n = SkChopQuadAtYExtrema(pts, monoX);
+    for (int i = 0; i <= n; i++) {
+        builder->addQuad(&monoX[i * 2]);
+    }
+}
+
 int SkEdgeBuilder::build(const SkPath& path, const SkIRect* iclip,
                          int shiftUp) {
     fAlloc.reset();
     fList.reset();
     fShiftUp = shiftUp;
 
+    SkScalar conicTol = SK_ScalarHalf * (1 << shiftUp);
+    
     if (SkPath::kLine_SegmentMask == path.getSegmentMasks()) {
         return this->buildPoly(path, iclip, shiftUp);
     }
@@ -192,6 +202,24 @@ int SkEdgeBuilder::build(const SkPath& path, const SkIRect* iclip,
                         this->addClipper(&clipper);
                     }
                     break;
+                case SkPath::kConic_Verb: {
+                    const int MAX_POW2 = 4;
+                    const int MAX_QUADS = 1 << MAX_POW2;
+                    const int MAX_QUAD_PTS = 1 + 2 * MAX_QUADS;
+                    SkPoint storage[MAX_QUAD_PTS];
+
+                    SkConic conic;
+                    conic.set(pts, iter.conicWeight());
+                    int pow2 = conic.computeQuadPOW2(conicTol);
+                    pow2 = SkMin32(pow2, MAX_POW2);
+                    int quadCount = conic.chopIntoQuadsPOW2(storage, pow2);
+                    SkASSERT(quadCount <= MAX_QUADS);
+                    for (int i = 0; i < quadCount; ++i) {
+                        if (clipper.clipQuad(&storage[i * 2], clip)) {
+                            this->addClipper(&clipper);
+                        }
+                    }
+                } break;
                 case SkPath::kCubic_Verb:
                     if (clipper.clipCubic(pts, clip)) {
                         this->addClipper(&clipper);
@@ -214,13 +242,26 @@ int SkEdgeBuilder::build(const SkPath& path, const SkIRect* iclip,
                     this->addLine(pts);
                     break;
                 case SkPath::kQuad_Verb: {
-                    SkPoint monoX[5];
-                    int n = SkChopQuadAtYExtrema(pts, monoX);
-                    for (int i = 0; i <= n; i++) {
-                        this->addQuad(&monoX[i * 2]);
-                    }
+                    handle_quad(this, pts);
                     break;
                 }
+                case SkPath::kConic_Verb: {
+                    const int MAX_POW2 = 4;
+                    const int MAX_QUADS = 1 << MAX_POW2;
+                    const int MAX_QUAD_PTS = 1 + 2 * MAX_QUADS;
+                    SkPoint storage[MAX_QUAD_PTS];
+                    
+                    SkConic conic;
+                    conic.set(pts, iter.conicWeight());
+                    int pow2 = conic.computeQuadPOW2(conicTol);
+                    pow2 = SkMin32(pow2, MAX_POW2);
+                    int quadCount = conic.chopIntoQuadsPOW2(storage, pow2);
+                    SkASSERT(quadCount <= MAX_QUADS);
+                    SkDebugf("--- quadCount = %d\n", quadCount);
+                    for (int i = 0; i < quadCount; ++i) {
+                        handle_quad(this, &storage[i * 2]);
+                    }
+                } break;
                 case SkPath::kCubic_Verb: {
                     SkPoint monoY[10];
                     int n = SkChopCubicAtYExtrema(pts, monoY);