The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/2d/unittest/TestCairo.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,53 @@
     1.4 +/* Any copyright is dedicated to the Public Domain.
     1.5 + * http://creativecommons.org/publicdomain/zero/1.0/
     1.6 + */
     1.7 +
     1.8 +#include "cairo.h"
     1.9 +
    1.10 +#include "gtest/gtest.h"
    1.11 +
    1.12 +namespace mozilla {
    1.13 +namespace layers {
    1.14 +
    1.15 +void TryCircle(double centerX, double centerY, double radius) {
    1.16 +  printf("TestCairo:TryArcs centerY %f, radius %f\n",centerY,radius);
    1.17 +
    1.18 +  cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,8,21);
    1.19 +  ASSERT_TRUE(surf != nullptr);
    1.20 +
    1.21 +  cairo_t *cairo = cairo_create(surf);
    1.22 +  ASSERT_TRUE(cairo != nullptr);
    1.23 +
    1.24 +  cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);
    1.25 +  cairo_arc(cairo, 0.0, centerY, radius, 0.0, 6.2831853071795862);
    1.26 +  cairo_fill_preserve(cairo);
    1.27 +
    1.28 +  cairo_surface_destroy(surf);
    1.29 +  cairo_destroy(cairo);
    1.30 +}
    1.31 +
    1.32 +TEST(Cairo, Simple) {
    1.33 +  TryCircle(0.0, 0.0, 14.0);
    1.34 +  TryCircle(0.0, 1.0, 22.4);
    1.35 +  TryCircle(1.0, 0.0, 1422.4);
    1.36 +  TryCircle(1.0, 1.0, 3422.4);
    1.37 +  TryCircle(-10.0, 1.0, -2);
    1.38 +}
    1.39 +
    1.40 +TEST(Cairo, Bug825721) {
    1.41 +  // OK:
    1.42 +  TryCircle(0.0, 0.0, 8761126469220696064.0);
    1.43 +  TryCircle(0.0, 1.0, 8761126469220696064.0);
    1.44 +
    1.45 +  // OK:
    1.46 +  TryCircle(1.0, 0.0, 5761126469220696064.0);
    1.47 +
    1.48 +  // This was the crash in 825721.  Note that centerY has to be non-zero,
    1.49 +  // and radius has to be not only large, but in particular range.
    1.50 +  // 825721 has a band-aid fix, where the crash is inevitable, but does
    1.51 +  // not fix the cause.  The same code crashes in cairo standalone.
    1.52 +  TryCircle(0.0, 1.0, 5761126469220696064.0);
    1.53 +}
    1.54 +
    1.55 +}
    1.56 +}