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/*
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 * Copyright © 2023 Marc Jeanmougin
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 *
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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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 * Red Hat, Inc. 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. Red Hat, Inc. 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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 *
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 * RED HAT, INC. 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 RED HAT, INC. 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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 *
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 * Author: Marc Jeanmougin <marc@jeanmougin.fr>
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 */
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#include "cairo-test.h"

            

        

            

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static void

            

        

            

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set_dither_source (cairo_t *cr, int width)

            

        

            

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{

            

        

            

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    cairo_pattern_t *gradient = cairo_pattern_create_linear (0, 0, width, 0);

            

        

            

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    cairo_pattern_add_color_stop_rgba (gradient, 0., 25./255, 25./255, 25./255, 1.0);

            

        

            

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    cairo_pattern_add_color_stop_rgba (gradient, 1., 45./255, 45./255, 45./255, 1.0);

            

        

            

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    cairo_set_source (cr, gradient);

            

        

            

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    cairo_pattern_set_dither (gradient, CAIRO_DITHER_BEST);

            

        

            

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    cairo_pattern_destroy (gradient);

            

        

            

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}

            

        

            

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/* History:

            

        

            

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 *

            

        

            

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 * 2023: v3 of a patch to use pixman dithering with cairo

            

        

            

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 */

            

        

            

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static cairo_test_status_t

            

        

            

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draw (cairo_t *cr, int width, int height)

            

        

            

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{

            

        

            

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    set_dither_source (cr, width);

            

        

            

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    cairo_paint (cr);

            

        

            

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    return CAIRO_TEST_SUCCESS;

            

        

            

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}

            

        

            

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static cairo_test_status_t

            

        

            

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draw2 (cairo_t *cr, int width, int height)

            

        

            

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{

            

        

            

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    cairo_set_source_rgb (cr, 0, 0, 0);

            

        

            

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    cairo_paint (cr);

            

        

            

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    set_dither_source (cr, width);

            

        

            

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    cairo_set_operator (cr, CAIRO_OPERATOR_ADD);

            

        

            

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    for (int i = 0; i < 5; i++) {

            

        

            

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        cairo_paint (cr);

            

        

            

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    }

            

        

            

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    return CAIRO_TEST_SUCCESS;

            

        

            

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}

            

        

            

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CAIRO_TEST (dithergradient,

            

        

            

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	    "Testing the creation of a dithered gradient (in argb32)",

            

        

            

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	    "gradient, dither", /* keywords */

            

        

            

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	    NULL, /* requirements */

            

        

            

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	    400, 100,

            

        

            

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	    NULL, draw)

            

        

            

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CAIRO_TEST (dithergradient2,

            

        

            

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	    "Testing the creation of a dithered gradient (in argb32)",

            

        

            

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	    "gradient, dither", /* keywords */

            

        

            

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	    NULL, /* requirements */

            

        

            

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	    400, 100,

            

        

            

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	    NULL, draw2)