| /* |
| * Copyright © 2006 Red Hat, Inc. |
| * |
| * 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 |
| * Red Hat, Inc. not be used in advertising or publicity pertaining to |
| * distribution of the software without specific, written prior |
| * permission. Red Hat, Inc. makes no representations about the |
| * suitability of this software for any purpose. It is provided "as |
| * is" without express or implied warranty. |
| * |
| * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS |
| * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org> |
| */ |
| |
| #include "cairo-test.h" |
| |
| #define SIZE 8 |
| #define PAD 2 |
| |
| static cairo_test_status_t |
| draw (cairo_t *cr, int width, int height) |
| { |
| cairo_surface_t *group; |
| double x, y; |
| |
| /* First paint background in blue. */ |
| cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); |
| cairo_paint (cr); |
| |
| /* Then clip so that the group surface ends up smaller than the |
| * original surface. */ |
| cairo_rectangle (cr, PAD, PAD, width - 2 * PAD, height - 2 * PAD); |
| cairo_clip (cr); |
| |
| /* Paint the clipped region in red (which should all be overwritten later). */ |
| cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); |
| cairo_paint (cr); |
| |
| /* Redirect to a new group and get that surface. */ |
| cairo_push_group (cr); |
| group = cairo_get_group_target (cr); |
| |
| /* Then paint in green what we query the group surface size to be. */ |
| cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); |
| cairo_surface_get_device_offset (group, &x, &y); |
| /* Or rather, we calculate the group surface size based on the |
| * only thing we can query which is the device offset. Ideally, |
| * the size would always be the minimal (width - 2 * PAD, height - |
| * 2 * PAD) based on the clip. But currently, group targets are |
| * created oversized for paginated surfaces, so we only subtract |
| * anything from the size if there is a non-zero device offfset. |
| * |
| * The calculation below might also be less confusing if the sign |
| * convention on the device offset were reversed, but it is what |
| * it is. Oh well. */ |
| cairo_rectangle (cr, |
| -x, -y, |
| width + 2 * x, |
| height + 2 * y); |
| cairo_fill (cr); |
| |
| /* Finish up the group painting. */ |
| cairo_pop_group_to_source (cr); |
| cairo_paint (cr); |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (get_group_target, |
| "Test of both cairo_get_group_target and cairo_surface_get_device_offset", |
| "api", /* keywords */ |
| NULL, /* requirements */ |
| SIZE, SIZE, |
| NULL, draw) |