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968ceb71d5
The idea is that for a rectangle intersection, each corner of the result is either entirely part of one original rectangle or it is an intersection point. By detecting those 2 cases and treating them differently, we can simplify the code to compare rounded rectangles.
399 lines
15 KiB
C
399 lines
15 KiB
C
/*
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* Copyright © 2020 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include <gsk/gskroundedrectprivate.h>
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static void
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test_contains_rect (void)
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{
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static double points[] = { -5, 0, 5, 10, 15, 85, 90, 95, 100, 105 };
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#define LAST (G_N_ELEMENTS(points) - 1)
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GskRoundedRect rounded;
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guint x1, x2, y1, y2;
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gsk_rounded_rect_init_from_rect (&rounded, &GRAPHENE_RECT_INIT (0, 0, 100, 100), 10);
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for (x1 = 0; x1 < G_N_ELEMENTS (points); x1++)
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for (x2 = x1 + 1; x2 < G_N_ELEMENTS (points); x2++)
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for (y1 = 0; y1 < G_N_ELEMENTS (points); y1++)
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for (y2 = y1 + 1; y2 < G_N_ELEMENTS (points); y2++)
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{
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graphene_rect_t rect;
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gboolean inside;
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/* check all points are in the bounding box */
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inside = x1 > 0 && y1 > 0 && x2 < LAST && y2 < LAST;
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/* now check all the corners */
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inside &= x1 > 2 || y1 > 2 || (x1 == 2 && y1 == 2);
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inside &= x2 < LAST - 2 || y1 > 2 || (x2 == LAST - 2 && y1 == 2);
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inside &= x2 < LAST - 2 || y2 < LAST - 2 || (x2 == LAST - 2 && y2 == LAST - 2);
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inside &= x1 > 2 || y2 < LAST - 2 || (x1 == 2 && y2 == LAST - 2);
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graphene_rect_init (&rect, points[x1], points[y1], points[x2] - points[x1], points[y2] - points[y1]);
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if (inside)
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g_assert_true (gsk_rounded_rect_contains_rect (&rounded, &rect));
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else
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g_assert_false (gsk_rounded_rect_contains_rect (&rounded, &rect));
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}
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#undef LAST
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}
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static void
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test_intersects_rect (void)
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{
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static double points[] = { -1, 0, 1, 99, 100, 101 };
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#define ALL_THE_POINTS (G_N_ELEMENTS(points))
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#define HALF_THE_POINTS (ALL_THE_POINTS / 2)
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GskRoundedRect rounded;
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guint x1, x2, y1, y2;
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gsk_rounded_rect_init_from_rect (&rounded, &GRAPHENE_RECT_INIT (0, 0, 100, 100), 10);
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for (x1 = 0; x1 < ALL_THE_POINTS; x1++)
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for (x2 = x1 + 1; x2 < ALL_THE_POINTS; x2++)
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for (y1 = 0; y1 < ALL_THE_POINTS; y1++)
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for (y2 = y1 + 1; y2 < ALL_THE_POINTS; y2++)
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{
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graphene_rect_t rect;
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gboolean should_contain_x, should_contain_y;
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graphene_rect_init (&rect, points[x1], points[y1], points[x2] - points[x1], points[y2] - points[y1]);
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should_contain_x = x1 < HALF_THE_POINTS && x2 >= HALF_THE_POINTS && y2 > 1 && y1 < ALL_THE_POINTS - 2;
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should_contain_y = y1 < HALF_THE_POINTS && y2 >= HALF_THE_POINTS && x2 > 1 && x1 < ALL_THE_POINTS - 2;
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if (should_contain_x || should_contain_y)
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g_assert_true (gsk_rounded_rect_intersects_rect (&rounded, &rect));
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else
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g_assert_false (gsk_rounded_rect_intersects_rect (&rounded, &rect));
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}
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#undef ALL_THE_POINTS
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#undef HALF_THE_POINTS
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}
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static void
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test_contains_point (void)
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{
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GskRoundedRect rect;
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gsk_rounded_rect_init (&rect,
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&GRAPHENE_RECT_INIT (0, 0, 100, 100),
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&GRAPHENE_SIZE_INIT (0, 0),
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&GRAPHENE_SIZE_INIT (10, 10),
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&GRAPHENE_SIZE_INIT (10, 20),
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&GRAPHENE_SIZE_INIT (20, 10));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (50, 50)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (0, 0)));
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g_assert_false (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (100, 0)));
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g_assert_false (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (100, 100)));
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g_assert_false (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (0, 100)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (0, 50)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (50, 0)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (50, 100)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (100, 50)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (95, 5)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (95, 90)));
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g_assert_true (gsk_rounded_rect_contains_point (&rect, &GRAPHENE_POINT_INIT (10, 95)));
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}
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static void
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test_is_circular (void)
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{
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GskRoundedRect rect;
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gsk_rounded_rect_init (&rect,
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&GRAPHENE_RECT_INIT (0, 0, 100, 100),
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&GRAPHENE_SIZE_INIT (0, 0),
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&GRAPHENE_SIZE_INIT (10, 10),
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&GRAPHENE_SIZE_INIT (10, 20),
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&GRAPHENE_SIZE_INIT (20, 10));
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g_assert_false (gsk_rounded_rect_is_circular (&rect));
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gsk_rounded_rect_init (&rect,
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&GRAPHENE_RECT_INIT (0, 0, 100, 100),
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&GRAPHENE_SIZE_INIT (0, 0),
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&GRAPHENE_SIZE_INIT (10, 10),
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&GRAPHENE_SIZE_INIT (20, 20),
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&GRAPHENE_SIZE_INIT (30, 30));
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g_assert_true (gsk_rounded_rect_is_circular (&rect));
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}
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static void
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test_to_float (void)
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{
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GskRoundedRect rect;
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float flt[12];
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gsk_rounded_rect_init (&rect,
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&GRAPHENE_RECT_INIT (0, 11, 22, 33),
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&GRAPHENE_SIZE_INIT (4, 5),
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&GRAPHENE_SIZE_INIT (6, 7),
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&GRAPHENE_SIZE_INIT (8, 9),
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&GRAPHENE_SIZE_INIT (10, 11));
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gsk_rounded_rect_to_float (&rect, &GRAPHENE_POINT_INIT(0, 0), flt);
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g_assert_true (flt[0] == 0. && flt[1] == 11. && flt[2] == 22. && flt[3] == 33.);
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g_assert_true (flt[4] == 4. && flt[5] == 6.);
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g_assert_true (flt[6] == 8. && flt[7] == 10.);
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g_assert_true (flt[8] == 5. && flt[9] == 7.);
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g_assert_true (flt[10] == 9. && flt[11] == 11.);
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gsk_rounded_rect_to_float (&rect, &GRAPHENE_POINT_INIT(100, 200), flt);
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g_assert_true (flt[0] == 100. && flt[1] == 211. && flt[2] == 22. && flt[3] == 33.);
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g_assert_true (flt[4] == 4. && flt[5] == 6.);
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g_assert_true (flt[6] == 8. && flt[7] == 10.);
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g_assert_true (flt[8] == 5. && flt[9] == 7.);
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g_assert_true (flt[10] == 9. && flt[11] == 11.);
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}
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#define ROUNDED_RECT_INIT_FULL(x,y,w,h,w0,h0,w1,h1,w2,h2,w3,h3) \
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(GskRoundedRect) { .bounds = GRAPHENE_RECT_INIT (x, y, w, h), \
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.corner = { \
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GRAPHENE_SIZE_INIT (w0, h0), \
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GRAPHENE_SIZE_INIT (w1, h1), \
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GRAPHENE_SIZE_INIT (w2, h2), \
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GRAPHENE_SIZE_INIT (w3, h3), \
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}}
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#define ROUNDED_RECT_INIT(x,y,w,h,r) \
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ROUNDED_RECT_INIT_FULL (x, y, w, h, r, r, r, r, r, r, r, r)
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#define ROUNDED_RECT_INIT_UNIFORM(x,y,w,h,r1,r2,r3,r4) \
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ROUNDED_RECT_INIT_FULL (x, y, w, h, r1, r1, r2, r2, r3, r3, r4, r4)
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static void
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test_intersect_with_rect (void)
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{
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struct {
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GskRoundedRect rounded;
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graphene_rect_t rect;
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GskRoundedRect expected;
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GskRoundedRectIntersection result;
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} test[] = {
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{ ROUNDED_RECT_INIT (20, 50, 100, 100, 50), GRAPHENE_RECT_INIT (60, 80, 60, 70),
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ROUNDED_RECT_INIT (0, 0, 0, 0, 0), GSK_INTERSECTION_NOT_REPRESENTABLE },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (0, 0, 100, 100),
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ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GSK_INTERSECTION_NONEMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (0, 0, 80, 80),
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ROUNDED_RECT_INIT_UNIFORM (0, 0, 80, 80, 10, 0, 0, 0), GSK_INTERSECTION_NONEMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (10, 10, 80, 80),
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ROUNDED_RECT_INIT (10, 10, 80, 80, 0), GSK_INTERSECTION_NONEMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (10, 15, 100, 70),
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ROUNDED_RECT_INIT (10, 15, 90, 70, 0), GSK_INTERSECTION_NONEMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (110, 0, 10, 10),
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ROUNDED_RECT_INIT (0, 0, 0, 0, 0), GSK_INTERSECTION_EMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (5, 5, 90, 90),
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ROUNDED_RECT_INIT (5, 5, 90, 90, 0), GSK_INTERSECTION_NONEMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (1, 1, 1, 1),
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ROUNDED_RECT_INIT (0, 0, 0, 0, 0), GSK_INTERSECTION_EMPTY },
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{ ROUNDED_RECT_INIT (0, 0, 100, 100, 10), GRAPHENE_RECT_INIT (5, -5, 10, 20),
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ROUNDED_RECT_INIT (0, 0, 0, 0, 0), GSK_INTERSECTION_NOT_REPRESENTABLE },
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{ ROUNDED_RECT_INIT_UNIFORM (-200, 0, 200, 100, 0, 0, 0, 40), GRAPHENE_RECT_INIT (-200, 0, 160, 100),
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ROUNDED_RECT_INIT_UNIFORM (-200, 0, 160, 100, 0, 0, 0, 40), GSK_INTERSECTION_NONEMPTY },
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};
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for (unsigned int i = 0; i < G_N_ELEMENTS (test); i++)
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{
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GskRoundedRect out;
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GskRoundedRectIntersection res;
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if (g_test_verbose ())
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g_test_message ("intersection test %u", i);
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memset (&out, 0, sizeof (GskRoundedRect));
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res = gsk_rounded_rect_intersect_with_rect (&test[i].rounded, &test[i].rect, &out);
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g_assert_true (res == test[i].result);
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if (res == GSK_INTERSECTION_NONEMPTY)
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{
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if (!gsk_rounded_rect_equal (&out, &test[i].expected))
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{
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char *s = gsk_rounded_rect_to_string (&test[i].expected);
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char *s2 = gsk_rounded_rect_to_string (&out);
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g_test_message ("expected %s, got %s\n", s, s2);
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}
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g_assert_true (gsk_rounded_rect_equal (&out, &test[i].expected));
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}
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g_assert_true ((res != GSK_INTERSECTION_EMPTY) == gsk_rounded_rect_intersects_rect (&test[i].rounded, &test[i].rect));
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}
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}
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static void
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test_intersect (void)
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{
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struct {
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GskRoundedRect a;
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GskRoundedRect b;
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GskRoundedRectIntersection result;
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GskRoundedRect expected;
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} test[] = {
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 0),
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(50, 50, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT_UNIFORM(50, 50, 50, 50, 20, 0, 20, 0),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(50, 0, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(50, 0, 50, 100, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(0, 50, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(0, 50, 100, 50, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(-50, -50, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 50, 50, 20, 0, 20, 0),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(0, -50, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(0, 0, 100, 50, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(-50, 0, 100, 100, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(0, 0, 50, 100, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(10, 10, 80, 80, 20),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(10, 10, 80, 80, 20),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 20),
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ROUNDED_RECT_INIT(10, 10, 80, 80, 10),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT(10, 10, 80, 80, 10),
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},
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{
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ROUNDED_RECT_INIT(0, 0, 100, 100, 40),
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ROUNDED_RECT_INIT(10, 10, 80, 80, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE,
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},
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{
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ROUNDED_RECT_INIT(10, 10, 100, 100, 40),
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ROUNDED_RECT_INIT(30, 0, 40, 40, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE,
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},
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{
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ROUNDED_RECT_INIT(10, 10, 100, 100, 40),
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ROUNDED_RECT_INIT(0, 0, 100, 20, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE,
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},
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{
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ROUNDED_RECT_INIT_UNIFORM(647, 18, 133, 35, 5, 0, 0, 5),
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ROUNDED_RECT_INIT_UNIFORM(14, 12, 1666, 889, 8, 8, 0, 0),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT_UNIFORM(647, 18, 133, 35, 5, 0, 0, 5),
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},
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{
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 100, 100, 100, 0, 0, 0),
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 100, 100, 0, 0, 100, 0),
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GSK_INTERSECTION_NONEMPTY,
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 100, 100, 100, 0, 100, 0),
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},
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{
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 100, 100, 100, 0, 0, 0),
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ROUNDED_RECT_INIT_UNIFORM(-20, -20, 100, 100, 0, 0, 100, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE,
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},
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{
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 50, 50, 0, 0, 50, 0),
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 20, 20, 20, 0, 0, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE, /* FIXME: should be empty */
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},
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{
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 50, 50, 0, 0, 50, 0),
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ROUNDED_RECT_INIT_UNIFORM(0, 0, 21, 21, 21, 0, 0, 0),
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GSK_INTERSECTION_NOT_REPRESENTABLE,
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},
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};
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gsize i;
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for (i = 0; i < G_N_ELEMENTS (test); i++)
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{
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GskRoundedRect out;
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GskRoundedRectIntersection res;
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if (g_test_verbose ())
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g_test_message ("intersection test %zu", i);
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memset (&out, 0, sizeof (GskRoundedRect));
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res = gsk_rounded_rect_intersection (&test[i].a, &test[i].b, &out);
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g_assert_cmpint (res, ==, test[i].result);
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if (res == GSK_INTERSECTION_NONEMPTY)
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{
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if (!gsk_rounded_rect_equal (&out, &test[i].expected))
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{
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char *a = gsk_rounded_rect_to_string (&test[i].a);
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char *b = gsk_rounded_rect_to_string (&test[i].b);
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char *expected = gsk_rounded_rect_to_string (&test[i].expected);
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char *result = gsk_rounded_rect_to_string (&out);
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g_test_message (" A = %s\n"
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" B = %s\n"
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"expected %s\n"
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" got %s\n",
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a, b, expected, result);
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}
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g_assert_true (gsk_rounded_rect_equal (&out, &test[i].expected));
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}
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}
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}
|
|
|
|
int
|
|
main (int argc,
|
|
char *argv[])
|
|
{
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|
gtk_test_init (&argc, &argv, NULL);
|
|
|
|
g_test_add_func ("/rounded-rect/contains-rect", test_contains_rect);
|
|
g_test_add_func ("/rounded-rect/intersects-rect", test_intersects_rect);
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|
g_test_add_func ("/rounded-rect/contains-point", test_contains_point);
|
|
g_test_add_func ("/rounded-rect/is-circular", test_is_circular);
|
|
g_test_add_func ("/rounded-rect/to-float", test_to_float);
|
|
g_test_add_func ("/rounded-rect/intersect-with-rect", test_intersect_with_rect);
|
|
g_test_add_func ("/rounded-rect/intersect", test_intersect);
|
|
|
|
return g_test_run ();
|
|
}
|