test/over-between-source.c

   1 /*
   2  * Copyright © 2007 Red Hat, Inc.
   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: Carl D. Worth <cworth@cworth.org>
  25  */
  26
  27 #include "cairo-test.h"
  28
  29 static cairo_test_draw_function_t draw;
  30
  31 #define SIZE 40
  32 #define PAD 2
  33 #define WIDTH (PAD + SIZE + PAD)
  34 #define HEIGHT WIDTH
  35
  36 /* This test is designed to explore the interactions of "native" and
  37  * "fallback" objects. For the ps surface, OVER with non-1.0 opacity
  38  * will be a fallback while SOURCE will be native. For the pdf
  39  * surface, it's the reverse where OVER is native while SOURCE is a
  40  * fallback. */
  41
  42 cairo_test_t test = {
  43     "over-between-source",
  44     "A simple test drawing a circle with OVER between two triangles drawn with SOURCE",
  45     WIDTH, HEIGHT,
  46     draw
  47 };
  48
  49 static cairo_test_status_t
  50 draw (cairo_t *cr, int width, int height)
  51 {
  52     cairo_translate (cr, PAD, PAD);
  53
  54     /* A red triangle with SOURCE */
  55     cairo_move_to     (cr,  SIZE / 5, SIZE / 5);
  56     cairo_rel_line_to (cr,  SIZE / 2, 0);
  57     cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
  58     cairo_close_path (cr);
  59
  60     cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
  61     cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
  62
  63     cairo_fill (cr);
  64
  65     /* A green circle with OVER */
  66     cairo_arc (cr, SIZE / 2, SIZE / 2, SIZE / 4, 0., 2. * M_PI);
  67
  68     cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
  69     cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
  70
  71     cairo_fill (cr);
  72
  73     /* Another red triangle with SOURCE */
  74     cairo_move_to     (cr,  SIZE / 2, SIZE / 2);
  75     cairo_rel_line_to (cr,  SIZE / 2, 0);
  76     cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
  77     cairo_close_path (cr);
  78
  79     cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
  80     cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
  81
  82     cairo_fill (cr);
  83
  84     return CAIRO_TEST_SUCCESS;
  85 }
  86
  87 int
  88 main (void)
  89 {
  90     return cairo_test (&test);
  91 }