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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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gfx/2d/unittest/TestCairo.cpp Normal file
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/* 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);
}
TEST(Cairo, Bug1063486) {
double x1, y1, x2, y2;
const double epsilon = .01;
cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 1, 1);
ASSERT_TRUE(surf != nullptr);
cairo_t *cairo = cairo_create(surf);
ASSERT_TRUE(cairo != nullptr);
printf("Path 1\n");
cairo_move_to(cairo, -20, -10);
cairo_line_to(cairo, 20, -10);
cairo_line_to(cairo, 20, 10);
cairo_curve_to(cairo, 10,10, -10,10, -20,10);
cairo_curve_to(cairo, -30,10, -30,-10, -20,-10);
cairo_path_extents(cairo, &x1, &y1, &x2, &y2);
ASSERT_LT(std::abs(-27.5 - x1), epsilon); // the failing coordinate
ASSERT_LT(std::abs(-10 - y1), epsilon);
ASSERT_LT(std::abs(20 - x2), epsilon);
ASSERT_LT(std::abs(10 - y2), epsilon);
printf("Path 2\n");
cairo_new_path(cairo);
cairo_move_to(cairo, 10, 30);
cairo_line_to(cairo, 90, 30);
cairo_curve_to(cairo, 30,30, 30,30, 10,30);
cairo_curve_to(cairo, 0,30, 0,0, 30,5);
cairo_path_extents(cairo, &x1, &y1, &x2, &y2);
ASSERT_LT(std::abs(4.019531 - x1), epsilon); // the failing coordinate
ASSERT_LT(std::abs(4.437500 - y1), epsilon);
ASSERT_LT(std::abs(90. - x2), epsilon);
ASSERT_LT(std::abs(30. - y2), epsilon);
cairo_surface_destroy(surf);
cairo_destroy(cairo);
}
} // namespace layers
} // namespace mozilla