cairo/test/device-offset-fractional.c

   1 /*
   2  * Copyright © 2006 Red Hat, Inc.
   3  * Copyright © 2008 Chris Wilson
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software
   6  * and its documentation for any purpose is hereby granted without
   7  * fee, provided that the above copyright notice appear in all copies
   8  * and that both that copyright notice and this permission notice
   9  * appear in supporting documentation, and that the name of
  10  * Red Hat, Inc. not be used in advertising or publicity pertaining to
  11  * distribution of the software without specific, written prior
  12  * permission. Red Hat, Inc. makes no representations about the
  13  * suitability of this software for any purpose.  It is provided "as
  14  * is" without express or implied warranty.
  15  *
  16  * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  17  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  18  * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
  19  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  20  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  21  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  22  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  23  *
  24  * Author: Carl D. Worth <cworth@cworth.org>
  25  *         Chris Wilson <chris@chris-wilson.co.uk>
  26  */
  27
  28 #include "cairo-test.h"
  29
  30 #define SIZE 10
  31 #define PAD 4
  32 #define COUNT 4
  33
  34 static cairo_test_draw_function_t draw;
  35
  36 static const cairo_test_t test = {
  37     "device-offset-fractional",
  38     "Test using image surfaces with fractional device-offsets as sources.",
  39     COUNT*(SIZE+PAD+.5)+PAD, COUNT*(SIZE+PAD+.5)+PAD,
  40     draw
  41 };
  42
  43 static cairo_test_status_t
  44 draw (cairo_t *cr, int width, int height)
  45 {
  46     cairo_surface_t *surface;
  47     cairo_t *cr2;
  48     int i,j;
  49
  50     /* Fill the background */
  51     cairo_set_source_rgb (cr, 1, 1, 1); /* white */
  52     cairo_paint (cr);
  53
  54     surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SIZE, SIZE);
  55     cr2 = cairo_create (surface);
  56     cairo_surface_destroy (surface);
  57
  58     cairo_set_source_rgb (cr2, 0, 0, 1); /* blue */
  59     cairo_paint (cr2);
  60
  61     cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);
  62     cairo_destroy (cr2);
  63
  64     for (i = 0; i < COUNT; i++) {
  65         for (j = 0; j < COUNT; j++) {
  66             cairo_surface_set_device_offset (surface,
  67                                              -i*(SIZE+PAD+.5)-PAD,
  68                                              -j*(SIZE+PAD+.5)-PAD);
  69             cairo_paint (cr);
  70         }
  71     }
  72
  73     return CAIRO_TEST_SUCCESS;
  74 }
  75
  76 int
  77 main (void)
  78 {
  79     return cairo_test (&test);
  80 }