diff options
-rw-r--r-- | test/Makefile.am | 2 | ||||
-rw-r--r-- | test/surface-pattern-big-scale-down.c | 121 |
2 files changed, 123 insertions, 0 deletions
diff --git a/test/Makefile.am b/test/Makefile.am index 9f0d6b7e7..020549f2f 100644 --- a/test/Makefile.am +++ b/test/Makefile.am @@ -93,6 +93,7 @@ source-clip-scale \ source-surface-scale-paint \ surface-finish-twice \ surface-pattern \ +surface-pattern-big-scale-down \ surface-pattern-scale-down \ surface-pattern-scale-up \ text-antialias-gray \ @@ -440,6 +441,7 @@ filter-nearest-offset \ long-lines \ self-intersecting \ surface-pattern \ +surface-pattern-big-scale-down \ surface-pattern-scale-down \ surface-pattern-scale-up diff --git a/test/surface-pattern-big-scale-down.c b/test/surface-pattern-big-scale-down.c new file mode 100644 index 000000000..d1f818cf7 --- /dev/null +++ b/test/surface-pattern-big-scale-down.c @@ -0,0 +1,121 @@ +/* + * Copyright © 2006 Mozilla Corporation + * + * Permission to use, copy, modify, distribute, and sell this software + * and its documentation for any purpose is hereby granted without + * fee, provided that the above copyright notice appear in all copies + * and that both that copyright notice and this permission notice + * appear in supporting documentation, and that the name of + * Mozilla Corporation not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Mozilla Corporation makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL, + * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR + * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: Vladimir Vukicevic <vladimir@pobox.com> + */ + +#include "cairo-test.h" + +static cairo_test_draw_function_t draw; + +#define SRC_WIDTH 2048 +#define SRC_HEIGHT 32 + +cairo_test_t test = { + "surface-pattern-big-scale-down", + "Test scaled-down transformed not-repeated surface patterns with large images and offsets", + 512, 16, + draw +}; + +static void +setup_source_surface (cairo_surface_t *surface, int w, int h) +{ + cairo_t *cr = cairo_create (surface); + + cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); + cairo_rectangle (cr, 0, 0, w/2, h/2); + cairo_fill (cr); + + cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); + cairo_rectangle (cr, w/2, 0, w/2, h/2); + cairo_fill (cr); + + cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); + cairo_rectangle (cr, 0, h/2, w/2, h/2); + cairo_fill (cr); + + cairo_set_source_rgb (cr, 1.0, 1.0, 0.0); + cairo_rectangle (cr, w/2, h/2, w/2, h/2); + cairo_fill (cr); + + cairo_destroy (cr); +} + +static void +draw_n (cairo_t *cr, cairo_pattern_t *pat, double dest_size, int n) +{ + cairo_matrix_t mat; + + cairo_matrix_init_scale (&mat, SRC_WIDTH / dest_size, SRC_HEIGHT / dest_size); + cairo_matrix_translate (&mat, n * -dest_size, 0.0); + cairo_pattern_set_matrix (pat, &mat); + + cairo_set_source (cr, pat); + cairo_new_path (cr); + cairo_rectangle (cr, n * dest_size, 0.0, dest_size, dest_size); + cairo_fill (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_surface_t *surface; + cairo_pattern_t *pat; + int n; + + cairo_set_source_rgb (cr, 0, 0, 0); + cairo_paint (cr); + + surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SRC_WIDTH, SRC_HEIGHT); + setup_source_surface (surface, SRC_WIDTH, SRC_HEIGHT); + + pat = cairo_pattern_create_for_surface (surface); + + /* We want to draw at a position such that n * SRC_WIDTH * (SRC_WIDTH/16.0) > 32768. + * x = n * 16. + * + * To show the bug, we want to draw on either side of the boundary; + * in our case here, n = 16 results in 32768, and n = 17 results in > 32768. + * + * Drawing at 16 and 17 is sufficient to show the problem. + */ + +#if 1 + /* n = 16 */ + draw_n (cr, pat, 16.0, 16); + + /* n = 17 */ + draw_n (cr, pat, 16.0, 17); +#else + for (n = 0; n < 32; n++) + draw_n (cr, pat, 16.0, n); +#endif + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test); +} |