| // Copyright 2019 Google LLC. | |
| // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. | |
| #include "tools/fiddle/examples.h" | |
| REG_FIDDLE(Path_IsCubicDegenerate, 256, 256, true, 0) { | |
| void draw(SkCanvas* canvas) { | |
| SkPoint points[] = {{1, 0}, {0, 0}, {0, 0}, {0, 0}}; | |
| SkScalar step = 1; | |
| SkScalar prior, length = 0, degenerate = 0; | |
| do { | |
| prior = points[0].fX; | |
| step /= 2; | |
| if (SkPath::IsCubicDegenerate(points[0], points[1], points[2], points[3], false)) { | |
| degenerate = prior; | |
| points[0].fX += step; | |
| } else { | |
| length = prior; | |
| points[0].fX -= step; | |
| } | |
| } while (prior != points[0].fX); | |
| SkDebugf("%1.8g is degenerate\n", degenerate); | |
| SkDebugf("%1.8g is length\n", length); | |
| } | |
| } // END FIDDLE |