cairo/test/pattern-getters.c

/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/*
 * Copyright © 2005 Mozilla Corporation, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of
 * Mozilla Corporation not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission. Mozilla Corporation makes no representations about the
 * suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Author: Vladimir Vukicevic <vladimir@pobox.com>
 */

#include <stdlib.h>
#include "cairo-test.h"

static cairo_test_draw_function_t draw;

cairo_test_t test = {
    "pattern-getters",
    "Tests calls to pattern getter functions",
    1, 1,
    draw
};

#define CHECK_SUCCESS do { if (status) return CAIRO_TEST_FAILURE; } while (0)

#define DOUBLE_EQUALS(a,b)  (fabs((a)-(b)) < 0.00001)

static int
double_buf_equal (double *a, double *b, int nc)
{
    int i;
    for (i = 0; i < nc; i++) {
	if (!DOUBLE_EQUALS(a[i],b[i])) {
	    cairo_test_log ("Error: doubles not equal: %g, %g\n",
			    a[i], b[i]);
	    return 0;
	}
    }
    return 1;
}

static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
    cairo_status_t status;
    cairo_pattern_t *pat;

    /* Test pattern_get_rgba */
    {
	double r, g, b, a;
	pat = cairo_pattern_create_rgba (0.2, 0.3, 0.4, 0.5);

	status = cairo_pattern_get_rgba (pat, &r, &g, &b, &a);
	CHECK_SUCCESS;

	if (!DOUBLE_EQUALS(r,0.2) ||
	    !DOUBLE_EQUALS(g,0.3) ||
	    !DOUBLE_EQUALS(b,0.4) ||
	    !DOUBLE_EQUALS(a,0.5)) {
	    cairo_test_log ("Error: cairo_pattern_get_rgba returned unexepcted results: %g, %g, %g, %g\n",
			    r, g, b, a);
	    return CAIRO_TEST_FAILURE;
	}

	cairo_pattern_destroy (pat);
    }

    /* Test pattern_get_surface */
    {
	cairo_surface_t *surf;

	pat = cairo_pattern_create_for_surface (cairo_get_target (cr));

	status = cairo_pattern_get_surface (pat, &surf);
	CHECK_SUCCESS;

	if (surf != cairo_get_target (cr)) {
	    cairo_test_log ("Error: cairo_pattern_get_resurface returned wrong surface\n");
	    return CAIRO_TEST_FAILURE;
	}

	cairo_pattern_destroy (pat);
    }

    /* Test get_color_stops & linear_get_points */
    {
	int i;
	double x0, y0, x1, y1;
	double expected_values[15] = { 0.0, 0.2, 0.4, 0.2, 1.0,
				       0.5, 0.4, 0.5, 0.2, 0.5,
				       1.0, 0.2, 0.4, 0.5, 0.2 };
	double new_buf[15];

	pat = cairo_pattern_create_linear (1.0, 2.0, 3.0, 4.0);

	for (i = 0; i < 3; i++) {
	    cairo_pattern_add_color_stop_rgba (pat,
					       expected_values[i*5+0],
					       expected_values[i*5+1],
					       expected_values[i*5+2],
					       expected_values[i*5+3],
					       expected_values[i*5+4]);
	}

	status = cairo_pattern_get_linear_points (pat, &x0, &y0, &x1, &y1);
	CHECK_SUCCESS;

	if (!DOUBLE_EQUALS(x0,1.0) ||
	    !DOUBLE_EQUALS(y0,2.0) ||
	    !DOUBLE_EQUALS(x1,3.0) ||
	    !DOUBLE_EQUALS(y1,4.0))
	    return CAIRO_TEST_FAILURE;

	status = cairo_pattern_get_color_stop_count (pat, &i);
	CHECK_SUCCESS;

	if (i != 3)
	    return CAIRO_TEST_FAILURE;

	for (i = 0; i < 3; i++) {
	    status = cairo_pattern_get_color_stop_rgba (pat, i,
							&new_buf[i*5+0],
							&new_buf[i*5+1],
							&new_buf[i*5+2],
							&new_buf[i*5+3],
							&new_buf[i*5+4]);
	    CHECK_SUCCESS;
	}

	status = cairo_pattern_get_color_stop_rgba (pat, 5, NULL, NULL, NULL, NULL, NULL);
	if (status != CAIRO_STATUS_INVALID_INDEX)
	    return CAIRO_TEST_FAILURE;

	if (!double_buf_equal (new_buf, expected_values, sizeof(expected_values)/sizeof(double)) != 0)
	    return CAIRO_TEST_FAILURE;

	cairo_pattern_destroy (pat);
    }

    /* Test radial_get_circles */
    {
	double a, b, c, d, e, f;
	pat = cairo_pattern_create_radial (1, 2, 3,
					   4, 5, 6);

	status = cairo_pattern_get_radial_circles (pat, &a, &b, &c, &d, &e, &f);
	CHECK_SUCCESS;

	if (!DOUBLE_EQUALS(a,1.0) ||
	    !DOUBLE_EQUALS(b,2.0) ||
	    !DOUBLE_EQUALS(c,3.0) ||
	    !DOUBLE_EQUALS(d,4.0) ||
	    !DOUBLE_EQUALS(e,5.0) ||
	    !DOUBLE_EQUALS(f,6.0))
	    return CAIRO_TEST_FAILURE;

	cairo_pattern_destroy (pat);
    }

    cairo_set_source_rgb (cr, 0, 1, 0);
    cairo_paint (cr);

    return CAIRO_TEST_SUCCESS;
}

int
main (void)
{
    return cairo_test (&test);
}