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/*
* Copyright © 2006 Mozilla Corporation
*
* 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 "cairo-test.h"
#define SRC_WIDTH 2048
#define SRC_HEIGHT 32
static cairo_surface_t *
create_source_surface (int w, int h)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SRC_WIDTH, SRC_HEIGHT);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_rectangle (cr, 0, 0, w/2, h/2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
cairo_rectangle (cr, w/2, 0, w/2, h/2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0.0, 0.0, 1.0);
cairo_rectangle (cr, 0, h/2, w/2, h/2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 0.0);
cairo_rectangle (cr, w/2, h/2, w/2, h/2);
cairo_fill (cr);
surface = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return surface;
}
static void
draw_n (cairo_t *cr, cairo_pattern_t *pat, double dest_size, int n)
{
cairo_matrix_t mat;
cairo_matrix_init_scale (&mat, SRC_WIDTH / dest_size, SRC_HEIGHT / dest_size);
cairo_matrix_translate (&mat, n * -dest_size, 0.0);
cairo_pattern_set_matrix (pat, &mat);
cairo_set_source (cr, pat);
cairo_new_path (cr);
cairo_rectangle (cr, n * dest_size, 0.0, dest_size, dest_size);
cairo_fill (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *surface;
cairo_pattern_t *pat;
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
surface = create_source_surface (SRC_WIDTH, SRC_HEIGHT);
pat = cairo_pattern_create_for_surface (surface);
cairo_surface_destroy (surface);
/* We want to draw at a position such that n * SRC_WIDTH * (SRC_WIDTH/16.0) > 32768.
* x = n * 16.
*
* To show the bug, we want to draw on either side of the boundary;
* in our case here, n = 16 results in 32768, and n = 17 results in > 32768.
*
* Drawing at 16 and 17 is sufficient to show the problem.
*/
#if 1
/* n = 16 */
draw_n (cr, pat, 16.0, 16);
/* n = 17 */
draw_n (cr, pat, 16.0, 17);
#else
{
int n;
for (n = 0; n < 32; n++)
draw_n (cr, pat, 16.0, n);
}
#endif
cairo_pattern_destroy (pat);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (surface_pattern_big_scale_down,
"Test scaled-down transformed not-repeated surface patterns with large images and offsets",
"transform", /* keywords */
NULL, /* requirements */
512, 16,
NULL, draw)
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