cairo/test/move-to-show-surface.c

   1 /*
   2  * Copyright © 2004 Red Hat, Inc.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software
   5  * and its documentation for any purpose is hereby granted without
   6  * fee, provided that the above copyright notice appear in all copies
   7  * and that both that copyright notice and this permission notice
   8  * appear in supporting documentation, and that the name of
   9  * Red Hat, Inc. not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. Red Hat, Inc. makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
  18  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  21  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Author: Carl D. Worth <cworth@cworth.org>
  24  */
  25
  26 /* Bug history
  27  *
  28  * 2004-10-25  Carl Worth  <cworth@cworth.org>
  29  *
  30  *   It looks like cairo_show_surface has no effect if it follows a
  31  *   call to cairo_move_to to any coordinate other than 0,0. A little
  32  *   bit of poking around suggests this isn't a regression, (at least
  33  *   not since the last pixman snapshot).
  34  *
  35  * 2005-04-02  Carl Worth <cworth@cworth.org>
  36  *
  37  *   Status: RESOLVED
  38  *
  39  *   Inside cairo_show_surface the current point was being used as
  40  *   both source and destination offsets. After fixing that to use 0,0
  41  *   as the source offset and the current point as the destination
  42  *   offset, the bug seems to be gone.
  43  *
  44  */
  45
  46 #include "cairo-test.h"
  47
  48 static cairo_test_draw_function_t draw;
  49
  50 static const cairo_test_t test = {
  51     "move-to-show-surface",
  52     "Tests calls to cairo_show_surface after cairo_move_to",
  53     2, 2,
  54     draw
  55 };
  56
  57 static cairo_test_status_t
  58 draw (cairo_t *cr, int width, int height)
  59 {
  60     cairo_surface_t *surface;
  61     uint32_t colors[4] = {
  62         0xffffffff, 0xffff0000,
  63         0xff00ff00, 0xff0000ff
  64     };
  65     int i;
  66
  67     for (i=0; i < 4; i++) {
  68         surface = cairo_image_surface_create_for_data ((unsigned char *) &colors[i],
  69                                                        CAIRO_FORMAT_RGB24,
  70                                                        1, 1, 4);
  71         cairo_set_source_surface (cr, surface,
  72                                   i % 2, i / 2);
  73         cairo_paint (cr);
  74         cairo_surface_destroy (surface);
  75     }
  76
  77     return CAIRO_TEST_SUCCESS;
  78 }
  79
  80 int
  81 main (void)
  82 {
  83     return cairo_test (&test);
  84 }