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      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