1 // Copyright 2019 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 // HASH=6b97099acdae80b16df0c4241f593991
5 REG_FIDDLE(Path_IsCubicDegenerate, 256, 256, true, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkPoint points[] = {{1, 0}, {0, 0}, {0, 0}, {0, 0}};
8 SkScalar step = 1;
9 SkScalar prior, length = 0, degenerate = 0;
10 do {
11 prior = points[0].fX;
12 step /= 2;
13 if (SkPath::IsCubicDegenerate(points[0], points[1], points[2], points[3], false)) {
14 degenerate = prior;
15 points[0].fX += step;
16 } else {
17 length = prior;
18 points[0].fX -= step;
19 }
20 } while (prior != points[0].fX);
21 SkDebugf("%1.8g is degenerate\n", degenerate);
22 SkDebugf("%1.8g is length\n", length);
23 }
24 } // END FIDDLE
25