| /* |
| * 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" |
| |
| #define SRC_WIDTH 2048 |
| #define SRC_HEIGHT 32 |
| |
| static cairo_surface_t * |
| create_source_surface (int w, int h) |
| { |
| cairo_surface_t *surface; |
| cairo_t *cr; |
| |
| surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SRC_WIDTH, SRC_HEIGHT); |
| cr = cairo_create (surface); |
| cairo_surface_destroy (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); |
| |
| surface = cairo_surface_reference (cairo_get_target (cr)); |
| cairo_destroy (cr); |
| |
| return surface; |
| } |
| |
| 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; |
| |
| cairo_set_source_rgb (cr, 0, 0, 0); |
| cairo_paint (cr); |
| |
| surface = create_source_surface (SRC_WIDTH, SRC_HEIGHT); |
| |
| pat = cairo_pattern_create_for_surface (surface); |
| cairo_surface_destroy (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 |
| { |
| int n; |
| for (n = 0; n < 32; n++) |
| draw_n (cr, pat, 16.0, n); |
| } |
| #endif |
| |
| cairo_pattern_destroy (pat); |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (surface_pattern_big_scale_down, |
| "Test scaled-down transformed not-repeated surface patterns with large images and offsets", |
| "transform", /* keywords */ |
| NULL, /* requirements */ |
| 512, 16, |
| NULL, draw) |