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97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
/* Any copyright is dedicated to the Public Domain.
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* http://creativecommons.org/publicdomain/zero/1.0/
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*/
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#include "cairo.h"
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#include "gtest/gtest.h"
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namespace mozilla {
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namespace layers {
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void TryCircle(double centerX, double centerY, double radius) {
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printf("TestCairo:TryArcs centerY %f, radius %f\n",centerY,radius);
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cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,8,21);
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ASSERT_TRUE(surf != nullptr);
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cairo_t *cairo = cairo_create(surf);
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ASSERT_TRUE(cairo != nullptr);
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cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);
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cairo_arc(cairo, 0.0, centerY, radius, 0.0, 6.2831853071795862);
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cairo_fill_preserve(cairo);
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cairo_surface_destroy(surf);
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cairo_destroy(cairo);
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}
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TEST(Cairo, Simple) {
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TryCircle(0.0, 0.0, 14.0);
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TryCircle(0.0, 1.0, 22.4);
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TryCircle(1.0, 0.0, 1422.4);
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TryCircle(1.0, 1.0, 3422.4);
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TryCircle(-10.0, 1.0, -2);
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}
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TEST(Cairo, Bug825721) {
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// OK:
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TryCircle(0.0, 0.0, 8761126469220696064.0);
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TryCircle(0.0, 1.0, 8761126469220696064.0);
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// OK:
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TryCircle(1.0, 0.0, 5761126469220696064.0);
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// This was the crash in 825721. Note that centerY has to be non-zero,
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// and radius has to be not only large, but in particular range.
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// 825721 has a band-aid fix, where the crash is inevitable, but does
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// not fix the cause. The same code crashes in cairo standalone.
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TryCircle(0.0, 1.0, 5761126469220696064.0);
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}
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TEST(Cairo, Bug1063486) {
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double x1, y1, x2, y2;
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const double epsilon = .01;
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cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 1, 1);
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ASSERT_TRUE(surf != nullptr);
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cairo_t *cairo = cairo_create(surf);
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ASSERT_TRUE(cairo != nullptr);
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printf("Path 1\n");
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cairo_move_to(cairo, -20, -10);
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cairo_line_to(cairo, 20, -10);
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cairo_line_to(cairo, 20, 10);
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cairo_curve_to(cairo, 10,10, -10,10, -20,10);
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cairo_curve_to(cairo, -30,10, -30,-10, -20,-10);
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cairo_path_extents(cairo, &x1, &y1, &x2, &y2);
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ASSERT_LT(std::abs(-27.5 - x1), epsilon); // the failing coordinate
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ASSERT_LT(std::abs(-10 - y1), epsilon);
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ASSERT_LT(std::abs(20 - x2), epsilon);
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ASSERT_LT(std::abs(10 - y2), epsilon);
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printf("Path 2\n");
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cairo_new_path(cairo);
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cairo_move_to(cairo, 10, 30);
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cairo_line_to(cairo, 90, 30);
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cairo_curve_to(cairo, 30,30, 30,30, 10,30);
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cairo_curve_to(cairo, 0,30, 0,0, 30,5);
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cairo_path_extents(cairo, &x1, &y1, &x2, &y2);
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ASSERT_LT(std::abs(4.019531 - x1), epsilon); // the failing coordinate
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ASSERT_LT(std::abs(4.437500 - y1), epsilon);
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ASSERT_LT(std::abs(90. - x2), epsilon);
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ASSERT_LT(std::abs(30. - y2), epsilon);
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cairo_surface_destroy(surf);
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cairo_destroy(cairo);
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}
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} // namespace layers
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} // namespace mozilla
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