1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkBitmap.h" 9 #include "SkDashPathEffect.h" 10 #include "SkPaint.h" 11 #include "SkPath.h" 12 #include "gm.h" 13 14 // Repro case for skia:7674. Requires lots of RAM to run, and currently triggers UB: 15 // ../include/private/SkTDArray.h:382:26: 16 // runtime error: signed integer overflow: 2147483644 + 4 cannot be represented in type 'int' 17 18 #if 0 19 DEF_SIMPLE_GM(PathMeasure_explosion, canvas, 500,500) { 20 SkPaint p; 21 p.setAntiAlias(false); 22 float intervals[] = { 0, 10e9f }; 23 p.setStyle(SkPaint::kStroke_Style); 24 p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0)); 25 26 int quadratic_at[] = { 27 13, 68, 258, 1053, 1323, 2608, 10018, 15668, 59838, 557493, 696873, 871098, 4153813, 28 15845608, 48357008, 118059138, 288230353, 360287948, 562949933, 703687423, 1099511613, 0 29 }; 30 int next_quadratic_at = 0; 31 32 SkPath path; 33 path.moveTo(0, 0); 34 35 int i = 1; 36 for (int points = 1; points < 2147483647; ) { 37 if (points == quadratic_at[next_quadratic_at]) { 38 path.quadTo(i, 0, i, 0); 39 next_quadratic_at++; 40 points += 2; 41 } else { 42 path.lineTo(i, 0); 43 points += 1; 44 } 45 46 i++; 47 48 if (i == 1000000) { 49 path.moveTo(0, 0); 50 points += 1; 51 i = 1; 52 } 53 } 54 canvas->drawPath(path, p); 55 } 56 #endif 57