Grcov report - scale-offset-image.c

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/*

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 * Copyright 2008 Chris Wilson

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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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 * Chris Wilson 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. Chris Wilson 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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 * CHRIS WILSON 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 CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>

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*/

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/*

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 * Test case derived from the bug report by Michel Iwaniec:

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 * https://lists.cairographics.org/archives/cairo/2008-November/015660.html

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*/

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#include "cairo-test.h"

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static cairo_surface_t *

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3

create_source (cairo_surface_t *target, int width, int height)

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    cairo_surface_t *similar;

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    cairo_t *cr;

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3

    similar = cairo_image_surface_create (CAIRO_FORMAT_RGB24,

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					    width, height);

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3

    cr = cairo_create (similar);

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    cairo_surface_destroy (similar);

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3

    cairo_set_source_rgb (cr, 1, 1, 1);

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3

    cairo_rectangle (cr,

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		     width - 4, height - 4,

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		     2, 2);

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3

    cairo_fill (cr);

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3

    cairo_set_source_rgb (cr, 1, 0, 0);

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3

    cairo_rectangle (cr,

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3

		     width - 2, height - 4,

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		     2, 2);

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3

    cairo_fill (cr);

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3

    cairo_set_source_rgb (cr, 0, 1, 0);

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3

    cairo_rectangle (cr,

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3

		     width - 4, height - 2,

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		     2, 2);

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    cairo_fill (cr);

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    cairo_set_source_rgb (cr, 0, 0, 1);

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    cairo_rectangle (cr,

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		     width - 2, height - 2,

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		     2, 2);

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    cairo_fill (cr);

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3

    similar = cairo_surface_reference (cairo_get_target (cr));

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3

    cairo_destroy (cr);

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    return similar;

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static void

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draw_grid (cairo_t *cr, cairo_pattern_t *pattern, int dst_x, int dst_y)

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    cairo_matrix_t m;

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    cairo_save (cr);

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    cairo_translate (cr, dst_x, dst_y);

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    cairo_scale (cr, 16, 16);

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    cairo_rotate (cr, 1);

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    cairo_matrix_init_translate (&m, 2560-4, 1280-4);

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    cairo_pattern_set_matrix (pattern, &m);

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    cairo_set_source (cr, pattern);

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    cairo_rectangle (cr, 0, 0, 4, 4);

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    cairo_fill (cr);

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    cairo_set_source_rgb (cr, .7, .7, .7);

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    cairo_set_line_width (cr, 1./16);

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    cairo_move_to (cr, 0, 0);

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    cairo_line_to (cr, 4, 0);

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    cairo_move_to (cr, 0, 2);

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    cairo_line_to (cr, 4, 2);

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    cairo_move_to (cr, 0, 4);

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    cairo_line_to (cr, 4, 4);

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    cairo_move_to (cr, 0, 0);

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    cairo_line_to (cr, 0, 4);

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    cairo_move_to (cr, 2, 0);

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    cairo_line_to (cr, 2, 4);

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    cairo_move_to (cr, 4, 0);

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    cairo_line_to (cr, 4, 4);

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    cairo_stroke (cr);

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    cairo_restore (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 *source;

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    cairo_pattern_t *pattern;

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3

    cairo_paint (cr);

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    source = create_source (cairo_get_target (cr), 2560, 1280);

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    pattern = cairo_pattern_create_for_surface (source);

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    cairo_surface_destroy (source);

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    cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);

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    cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE);

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    draw_grid (cr, pattern, 50, 0);

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    draw_grid (cr, pattern, 130, 0);

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    draw_grid (cr, pattern, 210, 0);

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    draw_grid (cr, pattern, 290, 0);

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    draw_grid (cr, pattern, 50,  230);

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    draw_grid (cr, pattern, 130, 230);

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    draw_grid (cr, pattern, 210, 230);

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    draw_grid (cr, pattern, 290, 230);

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    cairo_pattern_destroy (pattern);

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    return CAIRO_TEST_SUCCESS;

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/* XFAIL: loss of precision converting a cairo matrix to */

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CAIRO_TEST (scale_offset_image,

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	    "Tests drawing surfaces under various scales and transforms",

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	    "surface, scale-offset", /* keywords */

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	    NULL, /* requirements */

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	    320, 320,

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	    NULL, draw)

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