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

gfx/2d/unittest/TestCairo.cpp@6474c204b198 (annotated)

Wed, 31 Dec 2014 06:09:35 +0100

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

 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/
  */
 #include "cairo.h"
 #include "gtest/gtest.h"
 namespace mozilla {
 namespace layers {
 void TryCircle(double centerX, double centerY, double radius) {
   printf("TestCairo:TryArcs centerY %f, radius %f\n",centerY,radius);
   cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,8,21);
   ASSERT_TRUE(surf != nullptr);
   cairo_t *cairo = cairo_create(surf);
   ASSERT_TRUE(cairo != nullptr);
   cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);
   cairo_arc(cairo, 0.0, centerY, radius, 0.0, 6.2831853071795862);
   cairo_fill_preserve(cairo);
   cairo_surface_destroy(surf);
   cairo_destroy(cairo);
 }
 TEST(Cairo, Simple) {
   TryCircle(0.0, 0.0, 14.0);
   TryCircle(0.0, 1.0, 22.4);
   TryCircle(1.0, 0.0, 1422.4);
   TryCircle(1.0, 1.0, 3422.4);
   TryCircle(-10.0, 1.0, -2);
 }
 TEST(Cairo, Bug825721) {
   // OK:
   TryCircle(0.0, 0.0, 8761126469220696064.0);
   TryCircle(0.0, 1.0, 8761126469220696064.0);
   // OK:
   TryCircle(1.0, 0.0, 5761126469220696064.0);
   // This was the crash in 825721.  Note that centerY has to be non-zero,
   // and radius has to be not only large, but in particular range.
   // 825721 has a band-aid fix, where the crash is inevitable, but does
   // not fix the cause.  The same code crashes in cairo standalone.
   TryCircle(0.0, 1.0, 5761126469220696064.0);
 }
 }
 }