2 * Copyright 2012 Intel Corporation
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5 * obtaining a copy of this software and associated documentation
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10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Author: Chris Wilson <chris@chris-wilson.co.uk>
27 #include "cairo-test.h"
29 /* Test the fidelity of the rasterisation, because Cairo is my favourite
33 #define GENERATE_REFERENCE 0
38 #include "../src/cairo-fixed-type-private.h"
39 #define PRECISION (1 << CAIRO_FIXED_FRAC_BITS)
41 static cairo_test_status_t
42 vertical (cairo_t *cr, int width, int height)
46 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
49 cairo_set_source_rgba (cr, 1, 1, 1, 1);
50 for (x = -HEIGHT*PRECISION-2; x <= (WIDTH+HEIGHT)*PRECISION+2; x += 4) {
51 cairo_move_to (cr, x / (double)PRECISION - 2, -2);
52 cairo_rel_line_to (cr, 0, HEIGHT + 4);
54 cairo_set_line_width (cr, 2 / (double)PRECISION);
57 return CAIRO_TEST_SUCCESS;
60 static cairo_test_status_t
61 horizontal (cairo_t *cr, int width, int height)
65 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
68 cairo_set_source_rgba (cr, 1, 1, 1, 1);
69 for (x = -HEIGHT*PRECISION-2; x <= (WIDTH+HEIGHT)*PRECISION+2; x += 4) {
70 cairo_move_to (cr, -2, x / (double)PRECISION - 2);
71 cairo_rel_line_to (cr, HEIGHT + 4, 0);
73 cairo_set_line_width (cr, 2 / (double)PRECISION);
76 return CAIRO_TEST_SUCCESS;
79 static cairo_test_status_t
80 diagonal (cairo_t *cr, int width, int height)
84 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
87 cairo_set_source_rgba (cr, 1, 1, 1, 1);
88 for (x = -HEIGHT*PRECISION-2; x <= (WIDTH+HEIGHT)*PRECISION+2; x += 6) {
89 cairo_move_to (cr, x / (double)PRECISION - 2, -2);
90 cairo_rel_line_to (cr, HEIGHT + 4, HEIGHT + 4);
92 cairo_set_line_width (cr, 2 / (double)PRECISION);
95 return CAIRO_TEST_SUCCESS;
98 CAIRO_TEST (sample_vertical,
99 "Check the fidelity of the rasterisation.",
101 "target=raster slow", /* requirements */
105 CAIRO_TEST (sample_horizontal,
106 "Check the fidelity of the rasterisation.",
108 "target=raster slow", /* requirements */
112 CAIRO_TEST (sample_diagonal,
113 "Check the fidelity of the rasterisation.",
115 "target=raster slow", /* requirements */