test/mask-ctm.c

/*
 * Copyright © 2005 Red Hat, 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
 * Red Hat, Inc. not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission. Red Hat, Inc. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
 */

#include "cairo-test.h"

static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
    cairo_surface_t *mask_surface;
    cairo_pattern_t *mask;
    uint32_t data[] = {
	0x80000000, 0x80000000,
	0x80000000, 0x80000000,
    };
    cairo_matrix_t matrix;

    mask_surface = cairo_image_surface_create_for_data ((unsigned char *) data,
							CAIRO_FORMAT_ARGB32, 2, 2, 8);
    mask = cairo_pattern_create_for_surface (mask_surface);

    cairo_set_source_rgb (cr, 1.0, 0, 0);

    /* We can translate with the CTM, with the pattern matrix, or with
     * both. */

    /* 1. CTM alone. */
    cairo_save (cr);
    {
	cairo_translate (cr, 2, 2);
	cairo_mask (cr, mask);
    }
    cairo_restore (cr);

    /* 2. Pattern matrix alone. */
    cairo_matrix_init_translate (&matrix, -4, -4);
    cairo_pattern_set_matrix (mask, &matrix);

    cairo_mask (cr, mask);

    /* 3. CTM + pattern matrix */
    cairo_translate (cr, 2, 2);
    cairo_mask (cr, mask);

    cairo_pattern_destroy (mask);

    cairo_surface_finish (mask_surface); /* data goes out of scope */
    cairo_surface_destroy (mask_surface);

    return CAIRO_TEST_SUCCESS;
}

CAIRO_TEST (mask_ctm,
	    "Test that cairo_mask is affected properly by the CTM",
	    "mask", /* keywords */
	    NULL, /* requirements */
	    10, 10,
	    NULL, draw)