2 * Copyright 2008 Chris Wilson
4 * Permission to use, copy, modify, distribute, and sell this software
5 * and its documentation for any purpose is hereby granted without
6 * fee, provided that the above copyright notice appear in all copies
7 * and that both that copyright notice and this permission notice
8 * appear in supporting documentation, and that the name of
9 * Chris Wilson not be used in advertising or publicity pertaining to
10 * distribution of the software without specific, written prior
11 * permission. Chris Wilson makes no representations about the
12 * suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
15 * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
16 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
18 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
19 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
21 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Author: Chris Wilson <chris@chris-wilson.co.uk>
27 * Test case derived from the bug report by Michel Iwaniec:
28 * http://lists.cairographics.org/archives/cairo/2008-November/015660.html
31 #include "cairo-test.h"
33 static cairo_surface_t *
34 create_source (cairo_surface_t *target, int width, int height)
36 cairo_surface_t *similar;
39 similar = cairo_surface_create_similar (target,
42 cr = cairo_create (similar);
43 cairo_surface_destroy (similar);
45 cairo_set_source_rgb (cr, 1, 1, 1);
47 width - 4, height - 4,
50 cairo_set_source_rgb (cr, 1, 0, 0);
52 width - 2, height - 4,
55 cairo_set_source_rgb (cr, 0, 1, 0);
57 width - 4, height - 2,
60 cairo_set_source_rgb (cr, 0, 0, 1);
62 width - 2, height - 2,
66 similar = cairo_surface_reference (cairo_get_target (cr));
73 draw_grid (cairo_t *cr, cairo_pattern_t *pattern, int dst_x, int dst_y)
78 cairo_translate (cr, dst_x, dst_y);
79 cairo_scale (cr, 16, 16);
82 cairo_matrix_init_translate (&m, 2560-4, 1280-4);
83 cairo_pattern_set_matrix (pattern, &m);
84 cairo_set_source (cr, pattern);
85 cairo_rectangle (cr, 0, 0, 4, 4);
88 cairo_set_source_rgb (cr, .7, .7, .7);
89 cairo_set_line_width (cr, 1./16);
90 cairo_move_to (cr, 0, 0);
91 cairo_line_to (cr, 4, 0);
92 cairo_move_to (cr, 0, 2);
93 cairo_line_to (cr, 4, 2);
94 cairo_move_to (cr, 0, 4);
95 cairo_line_to (cr, 4, 4);
96 cairo_move_to (cr, 0, 0);
97 cairo_line_to (cr, 0, 4);
98 cairo_move_to (cr, 2, 0);
99 cairo_line_to (cr, 2, 4);
100 cairo_move_to (cr, 4, 0);
101 cairo_line_to (cr, 4, 4);
107 static cairo_test_status_t
108 draw (cairo_t *cr, int width, int height)
110 cairo_surface_t *source;
111 cairo_pattern_t *pattern;
115 source = create_source (cairo_get_target (cr), 2560, 1280);
116 pattern = cairo_pattern_create_for_surface (source);
117 cairo_surface_destroy (source);
119 cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
120 cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE);
122 draw_grid (cr, pattern, 50, 0);
123 draw_grid (cr, pattern, 130, 0);
124 draw_grid (cr, pattern, 210, 0);
125 draw_grid (cr, pattern, 290, 0);
127 draw_grid (cr, pattern, 50, 230);
128 draw_grid (cr, pattern, 130, 230);
129 draw_grid (cr, pattern, 210, 230);
130 draw_grid (cr, pattern, 290, 230);
132 cairo_pattern_destroy (pattern);
134 return CAIRO_TEST_SUCCESS;
137 CAIRO_TEST (scale_offset_similar,
138 "Tests drawing surfaces under various scales and transforms",
139 "surface, scale-offset", /* keywords */
140 NULL, /* requirements */