Grcov report - clip-polygons.c

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/*

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 * Copyright © 2011 Intel Corporation

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 * Permission is hereby granted, free of charge, to any person

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 * obtaining a copy of this software and associated documentation

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 * files (the "Software"), to deal in the Software without

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 * restriction, including without limitation the rights to use, copy,

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 * modify, merge, publish, distribute, sublicense, and/or sell copies

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 * of the Software, and to permit persons to whom the Software is

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 * furnished to do so, subject to the following conditions:

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 * The above copyright notice and this permission notice shall be

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 * included in all copies or substantial portions of the Software.

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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

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 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

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 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

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 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

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 * SOFTWARE.

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 * Author: Chris Wilson <chris@chris-wilson.co.uk>

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*/

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#include "cairo-test.h"

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#define STEP	5

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#define WIDTH	100

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#define HEIGHT	100

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static void diamond (cairo_t *cr)

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    cairo_move_to (cr, WIDTH/2, 0);

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    cairo_line_to (cr, WIDTH, HEIGHT/2);

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    cairo_line_to (cr, WIDTH/2, HEIGHT);

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    cairo_line_to (cr, 0, HEIGHT/2);

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    cairo_close_path (cr);

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static void background (cairo_t *cr)

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    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);

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3

    cairo_set_source_rgb (cr, 1,1,1);

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3

    cairo_paint (cr);

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3

    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);

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3

    cairo_set_source_rgb (cr, 0,0,0);

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3

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static cairo_test_status_t

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3

draw (cairo_t *cr, int width, int height)

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3

    background (cr);

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    /* completely overlapping diamonds */

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3

    cairo_save (cr);

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    diamond (cr);

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    cairo_clip (cr);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_paint (cr);

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    cairo_restore (cr);

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3

    cairo_translate (cr, WIDTH, 0);

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    /* partial overlap */

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3

    cairo_save (cr);

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3

    cairo_translate (cr, -WIDTH/4, 0);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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    cairo_translate (cr, WIDTH/2, 0);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_paint (cr);

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3

    cairo_restore (cr);

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3

    cairo_translate (cr, WIDTH, 0);

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    /* no overlap, but the bounding boxes must */

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    cairo_save (cr);

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    cairo_translate (cr, -WIDTH/2 + 2, -2);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_translate (cr, WIDTH - 4, 4);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_paint (cr);

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3

    cairo_restore (cr);

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3

    cairo_translate (cr, WIDTH, 0);

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    /* completely disjoint */

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3

    cairo_save (cr);

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3

    cairo_translate (cr, -WIDTH/2 - 1, 0);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_translate (cr, WIDTH + 2, 0);

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3

    diamond (cr);

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3

    cairo_clip (cr);

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3

    cairo_paint (cr);

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    cairo_restore (cr);

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (clip_polygons,

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	    "Test drawing through through an intersection of polygons",

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	    "clip", /* keywords */

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	    "target=raster", /* requirements */

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	    4*WIDTH, HEIGHT,

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	    NULL, draw)