2 * Copyright 2009 Benjamin Otte
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
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8 * modify, merge, publish, distribute, sublicense, and/or sell copies
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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
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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: Benjamin Otte <otte@gnome.org>
27 #include "cairo-test.h"
30 * Exercise a bug in the projection of a rotated trapezoid mask.
31 * I used CAIRO_ANTIALIAS_NONE and a single-color source in the test to get
32 * rid of aliasing issues in the output images. This makes some issues
33 * slightly less visible, but still fails for all of them. If you want to
35 * #define ANTIALIAS CAIRO_ANTIALIAS_DEFAULT
38 #define ANTIALIAS CAIRO_ANTIALIAS_NONE
40 static const char png_filename[] = "romedalen.png";
42 static cairo_pattern_t *
43 get_source (const cairo_test_context_t *ctx,
44 int *width, int *height)
46 cairo_surface_t *surface;
47 cairo_pattern_t *pattern;
49 if (ANTIALIAS == CAIRO_ANTIALIAS_NONE) {
52 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 256, 192);
53 cr = cairo_create (surface);
55 cairo_set_source_rgb (cr, 0.75, 0.25, 0.25);
58 pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
61 surface = cairo_test_create_surface_from_png (ctx, png_filename);
62 pattern = cairo_pattern_create_for_surface (surface);
65 *width = cairo_image_surface_get_width (surface);
66 *height = cairo_image_surface_get_height (surface);
67 cairo_surface_destroy (surface);
72 static cairo_test_status_t
73 draw (cairo_t *cr, int width, int height)
75 cairo_pattern_t *image;
76 int img_width, img_height;
78 image = get_source (cairo_test_get_context (cr),
79 &img_width, &img_height);
81 /* we don't want to debug antialiasing artifacts */
82 cairo_set_antialias (cr, ANTIALIAS);
84 /* dark grey background */
85 cairo_set_source_rgb (cr, 0.25, 0.25, 0.25);
89 cairo_translate (cr, 10, -40);
90 cairo_rotate (cr, -0.05);
92 /* place the image on our surface */
93 cairo_set_source (cr, image);
96 cairo_rectangle (cr, 0, 0, img_width, img_height);
99 cairo_pattern_destroy (image);
101 return CAIRO_TEST_SUCCESS;
104 CAIRO_TEST (xcomposite_projection,
105 "Test a bug with XRenderComposite reference computation when projecting the first trapezoid onto 16.16 space",
106 "xlib", /* keywords */
107 "target=raster", /* requirements */