Grcov report - surface-pattern-big-scale-down.c

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/*

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 * Copyright © 2006 Mozilla Corporation

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 * Permission to use, copy, modify, distribute, and sell this software

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 * and its documentation for any purpose is hereby granted without

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 * fee, provided that the above copyright notice appear in all copies

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 * and that both that copyright notice and this permission notice

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 * appear in supporting documentation, and that the name of

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 * Mozilla Corporation not be used in advertising or publicity pertaining to

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 * distribution of the software without specific, written prior

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 * permission. Mozilla Corporation makes no representations about the

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 * suitability of this software for any purpose.  It is provided "as

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 * is" without express or implied warranty.

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 * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

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 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

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 * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL,

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 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER

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 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

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 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR

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 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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 * Author: Vladimir Vukicevic <vladimir@pobox.com>

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*/

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#include "cairo-test.h"

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#define SRC_WIDTH 2048

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#define SRC_HEIGHT 32

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static cairo_surface_t *

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3

create_source_surface (int w, int h)

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    cairo_surface_t *surface;

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    cairo_t *cr;

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3

    surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SRC_WIDTH, SRC_HEIGHT);

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3

    cr = cairo_create (surface);

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3

    cairo_surface_destroy (surface);

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3

    cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);

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3

    cairo_rectangle (cr, 0, 0, w/2, h/2);

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3

    cairo_fill (cr);

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3

    cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);

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3

    cairo_rectangle (cr, w/2, 0, w/2, h/2);

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3

    cairo_fill (cr);

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3

    cairo_set_source_rgb (cr, 0.0, 0.0, 1.0);

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3

    cairo_rectangle (cr, 0, h/2, w/2, h/2);

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3

    cairo_fill (cr);

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3

    cairo_set_source_rgb (cr, 1.0, 1.0, 0.0);

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3

    cairo_rectangle (cr, w/2, h/2, w/2, h/2);

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3

    cairo_fill (cr);

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3

    surface = cairo_surface_reference (cairo_get_target (cr));

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3

    cairo_destroy (cr);

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3

    return surface;

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static void

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draw_n (cairo_t *cr, cairo_pattern_t *pat, double dest_size, int n)

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  cairo_matrix_t mat;

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  cairo_matrix_init_scale (&mat, SRC_WIDTH / dest_size, SRC_HEIGHT / dest_size);

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  cairo_matrix_translate (&mat, n * -dest_size, 0.0);

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  cairo_pattern_set_matrix (pat, &mat);

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  cairo_set_source (cr, pat);

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  cairo_new_path (cr);

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  cairo_rectangle (cr, n * dest_size, 0.0, dest_size, dest_size);

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  cairo_fill (cr);

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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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    cairo_surface_t *surface;

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    cairo_pattern_t *pat;

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3

    cairo_set_source_rgb (cr, 0, 0, 0);

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3

    cairo_paint (cr);

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    surface = create_source_surface (SRC_WIDTH, SRC_HEIGHT);

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3

    pat = cairo_pattern_create_for_surface (surface);

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3

    cairo_surface_destroy (surface);

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    /* We want to draw at a position such that n * SRC_WIDTH * (SRC_WIDTH/16.0) > 32768.

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     * x = n * 16.

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     * To show the bug, we want to draw on either side of the boundary;

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     * in our case here, n = 16 results in 32768, and n = 17 results in > 32768.

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     * Drawing at 16 and 17 is sufficient to show the problem.

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*/

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#if 1

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    /* n = 16 */

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3

    draw_n (cr, pat, 16.0, 16);

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    /* n = 17 */

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3

    draw_n (cr, pat, 16.0, 17);

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#else

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	int n;

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	for (n = 0; n < 32; n++)

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	    draw_n (cr, pat, 16.0, n);

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#endif

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3

    cairo_pattern_destroy (pat);

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3

    return CAIRO_TEST_SUCCESS;

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1

CAIRO_TEST (surface_pattern_big_scale_down,

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	    "Test scaled-down transformed not-repeated surface patterns with large images and offsets",

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	    "transform", /* keywords */

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	    NULL, /* requirements */

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	    512, 16,

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	    NULL, draw)