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/*
* Copyright 2008 Chris Wilson
*
* 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
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
*/
/*
* Test case derived from the bug report by Michel Iwaniec:
* https://lists.cairographics.org/archives/cairo/2008-November/015660.html
*/
#include "cairo-test.h"
static cairo_surface_t *
create_source (cairo_surface_t *target, int width, int height)
{
cairo_surface_t *similar;
cairo_t *cr;
similar = cairo_surface_create_similar (target,
CAIRO_CONTENT_COLOR,
width, height);
cr = cairo_create (similar);
cairo_surface_destroy (similar);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_rectangle (cr,
width - 4, height - 4,
2, 2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_rectangle (cr,
width - 2, height - 4,
2, 2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_rectangle (cr,
width - 4, height - 2,
2, 2);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_rectangle (cr,
width - 2, height - 2,
2, 2);
cairo_fill (cr);
similar = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return similar;
}
static void
draw_grid (cairo_t *cr, cairo_pattern_t *pattern, int dst_x, int dst_y)
{
cairo_matrix_t m;
cairo_save (cr);
cairo_translate (cr, dst_x, dst_y);
cairo_scale (cr, 16, 16);
cairo_rotate (cr, 1);
cairo_matrix_init_translate (&m, 2560-4, 1280-4);
cairo_pattern_set_matrix (pattern, &m);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0, 0, 4, 4);
cairo_fill (cr);
cairo_set_source_rgb (cr, .7, .7, .7);
cairo_set_line_width (cr, 1./16);
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, 4, 0);
cairo_move_to (cr, 0, 2);
cairo_line_to (cr, 4, 2);
cairo_move_to (cr, 0, 4);
cairo_line_to (cr, 4, 4);
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, 0, 4);
cairo_move_to (cr, 2, 0);
cairo_line_to (cr, 2, 4);
cairo_move_to (cr, 4, 0);
cairo_line_to (cr, 4, 4);
cairo_stroke (cr);
cairo_restore (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *source;
cairo_pattern_t *pattern;
cairo_paint (cr);
source = create_source (cairo_get_target (cr), 2560, 1280);
pattern = cairo_pattern_create_for_surface (source);
cairo_surface_destroy (source);
cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE);
draw_grid (cr, pattern, 50, 0);
draw_grid (cr, pattern, 130, 0);
draw_grid (cr, pattern, 210, 0);
draw_grid (cr, pattern, 290, 0);
draw_grid (cr, pattern, 50, 230);
draw_grid (cr, pattern, 130, 230);
draw_grid (cr, pattern, 210, 230);
draw_grid (cr, pattern, 290, 230);
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (scale_offset_similar,
"Tests drawing surfaces under various scales and transforms",
"surface, scale-offset", /* keywords */
NULL, /* requirements */
320, 320,
NULL, draw)
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