The Tor Browser: gfx/2d/unittest/TestCairo.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* Any copyright is dedicated to the Public Domain.

     2  * http://creativecommons.org/publicdomain/zero/1.0/

     3  */

     5 #include "cairo.h"

     7 #include "gtest/gtest.h"

     9 namespace mozilla {

    10 namespace layers {

    12 void TryCircle(double centerX, double centerY, double radius) {

    13   printf("TestCairo:TryArcs centerY %f, radius %f\n",centerY,radius);

    15   cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,8,21);

    16   ASSERT_TRUE(surf != nullptr);

    18   cairo_t *cairo = cairo_create(surf);

    19   ASSERT_TRUE(cairo != nullptr);

    21   cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);

    22   cairo_arc(cairo, 0.0, centerY, radius, 0.0, 6.2831853071795862);

    23   cairo_fill_preserve(cairo);

    25   cairo_surface_destroy(surf);

    26   cairo_destroy(cairo);

    27 }

    29 TEST(Cairo, Simple) {

    30   TryCircle(0.0, 0.0, 14.0);

    31   TryCircle(0.0, 1.0, 22.4);

    32   TryCircle(1.0, 0.0, 1422.4);

    33   TryCircle(1.0, 1.0, 3422.4);

    34   TryCircle(-10.0, 1.0, -2);

    35 }

    37 TEST(Cairo, Bug825721) {

    38   // OK:

    39   TryCircle(0.0, 0.0, 8761126469220696064.0);

    40   TryCircle(0.0, 1.0, 8761126469220696064.0);

    42   // OK:

    43   TryCircle(1.0, 0.0, 5761126469220696064.0);

    45   // This was the crash in 825721.  Note that centerY has to be non-zero,

    46   // and radius has to be not only large, but in particular range.

    47   // 825721 has a band-aid fix, where the crash is inevitable, but does

    48   // not fix the cause.  The same code crashes in cairo standalone.

    49   TryCircle(0.0, 1.0, 5761126469220696064.0);

    50 }

    52 }

    53 }

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