/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */

/*

 * Copyright 2011 Red Hat Inc.

 *

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

 * obtaining a copy of this software and associated documentation

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

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

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

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

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

 *

 * The above copyright notice and this permission notice shall be

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

 *

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

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

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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

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

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

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

 * SOFTWARE.

 *

 * Author: Benjamin Otte <otte@redhat.com>

 */

/*

 * Test case taken from the WebKit test suite, failure originally reported

 * by Zan Dobersek <zandobersek@gmail.com>. WebKit test is

 * LayoutTests/canvas/philip/tests/2d.path.rect.selfintersect.html

 */

#include "cairo-test.h"

#include <math.h>

#define LINE_WIDTH 60

#define SIZE 100

#define RECT_SIZE 10

static cairo_test_status_t

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

{

    /* fill with green so RGB and RGBA tests can share the ref image */

    cairo_set_source_rgb (cr, 0, 1, 0);

    cairo_paint (cr);

    /* red to see eventual bugs immediately */

    cairo_set_source_rgb (cr, 1, 0, 0);

    /* big line width */

    cairo_set_line_width (cr, LINE_WIDTH);

    /* rectangle that is smaller than the line width in center of image */

    cairo_rectangle (cr,

                     (SIZE - RECT_SIZE) / 2,

                     (SIZE - RECT_SIZE) / 2,

                     RECT_SIZE,

                     RECT_SIZE);

    cairo_stroke (cr);

    return CAIRO_TEST_SUCCESS;

}

/* and again slightly offset to trigger another path */

static cairo_test_status_t

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

{

    cairo_translate (cr, .5, .5);

    return draw (cr, width, height);

}

static cairo_test_status_t

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

{

    cairo_translate (cr, SIZE/2, SIZE/2);

    cairo_rotate (cr, M_PI/4);

    cairo_translate (cr, -SIZE/2, -SIZE/2);

    return draw (cr, width, height);

}

static cairo_test_status_t

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

{

    cairo_translate (cr, SIZE/2, SIZE/2);

    cairo_scale (cr, -1, 1);

    cairo_translate (cr, -SIZE/2, -SIZE/2);

    return draw (cr, width, height);

}

static cairo_test_status_t

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

{

    cairo_translate (cr, SIZE/2, SIZE/2);

    cairo_scale (cr, 1, -1);

    cairo_translate (cr, -SIZE/2, -SIZE/2);

    return draw (cr, width, height);

}

static cairo_test_status_t

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

{

    const double dashes[] = { 4 };

    cairo_set_dash (cr, dashes, 1, 0);

    cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);

    return draw (cr, width, height);

}

CAIRO_TEST (line_width_overlap,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw)

CAIRO_TEST (line_width_overlap_offset,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw_offset)

CAIRO_TEST (line_width_overlap_rotated,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw_rotated)

CAIRO_TEST (line_width_overlap_flipped,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw_flipped)

CAIRO_TEST (line_width_overlap_flopped,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw_flopped)

CAIRO_TEST (line_width_overlap_dashed,

	    "Test overlapping lines due to large line width",

	    "stroke", /* keywords */

	    NULL, /* requirements */

	    SIZE, SIZE,

	    NULL, draw_dashed)