cairo/test/rectilinear-fill.c

   1 /*
   2  * Copyright © 2008 Chris Wilson
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  * Author: Chris Wilson <chris@chris-wilson.co.uk>
  25  */
  26
  27 #include "cairo-test.h"
  28
  29 #define SIZE 24
  30
  31 static cairo_test_draw_function_t draw;
  32
  33 static const cairo_test_t test = {
  34     "rectilinear-fill",
  35     "Test rectilinear fill operations (covering only whole pixels)",
  36     SIZE, 2 * SIZE,
  37     draw
  38 };
  39
  40 static void
  41 draw_rectangles (cairo_t *cr)
  42 {
  43     cairo_save (cr);
  44
  45     /* test constructing single rectangles */
  46     cairo_rectangle (cr, 0, 0, SIZE/2, 2);
  47     cairo_fill (cr);
  48
  49     cairo_rectangle (cr, 0, 5, SIZE/2, -2);
  50     cairo_fill (cr);
  51
  52     cairo_rectangle (cr, SIZE/2, 6, -SIZE/2, 2);
  53     cairo_fill (cr);
  54
  55     cairo_rectangle (cr, SIZE/2, 11, -SIZE/2, -2);
  56     cairo_fill (cr);
  57
  58     /* test constructing multiple rectangles */
  59     cairo_translate (cr, 0, 12);
  60     cairo_rectangle (cr, 0, 0, SIZE/2, 2);
  61     cairo_rectangle (cr, 0, 5, SIZE/2, -2);
  62     cairo_rectangle (cr, SIZE/2, 6, -SIZE/2, 2);
  63     cairo_rectangle (cr, SIZE/2, 11, -SIZE/2, -2);
  64     cairo_fill (cr);
  65
  66     cairo_restore (cr);
  67 }
  68
  69 static cairo_test_status_t
  70 draw (cairo_t *cr, int width, int height)
  71 {
  72     /* Paint background white, then draw in black. */
  73     cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
  74     cairo_paint (cr);
  75     cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
  76
  77     draw_rectangles (cr);
  78
  79     /* and check using cw winding */
  80     cairo_translate (cr, SIZE, SIZE);
  81     cairo_scale (cr, -1, 1);
  82
  83     draw_rectangles (cr);
  84
  85     return CAIRO_TEST_SUCCESS;
  86 }
  87
  88 int
  89 main (void)
  90 {
  91     return cairo_test (&test);
  92 }