| /* |
| * 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" |
| #include <stddef.h> |
| |
| #define SIZE 10 |
| #define PAD 2 |
| |
| static void |
| draw_square (cairo_t *cr) |
| { |
| cairo_rectangle (cr, |
| PAD, PAD, |
| SIZE - 2 * PAD, |
| SIZE - 2 * PAD); |
| cairo_fill (cr); |
| } |
| |
| static cairo_test_status_t |
| draw (cairo_t *cr, int width, int height) |
| { |
| cairo_surface_t *surface, *target; |
| cairo_t *cr2; |
| |
| /* First draw a shape in blue on the original destination. */ |
| cairo_set_source_rgb (cr, 0, 0, 1); /* blue */ |
| draw_square (cr); |
| |
| /* Then, create an offset surface and repeat the drawing in red. */ |
| target = cairo_get_group_target (cr); |
| surface = cairo_surface_create_similar (target, |
| cairo_surface_get_content (target), |
| SIZE / 2, SIZE / 2); |
| cairo_surface_set_device_offset (surface, - SIZE / 2, - SIZE / 2); |
| cr2 = cairo_create (surface); |
| cairo_surface_destroy (surface); |
| |
| cairo_set_source_rgb (cr2, 1, 0, 0); /* red */ |
| draw_square (cr2); |
| |
| |
| /* Finally, copy the offset surface to the original destination. |
| * The final result should be a blue square with the lower-right |
| * quarter red. */ |
| cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0); |
| cairo_destroy (cr2); |
| |
| cairo_paint (cr); |
| |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (device_offset, |
| "Simple test using a surface with a negative device-offset as a source.", |
| "device-offset", /* keywords */ |
| NULL, /* requirements */ |
| SIZE, SIZE, |
| NULL, draw) |