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/*
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 * Copyright © 2006 Red Hat, Inc.
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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: Carl D. Worth <cworth@cworth.org>
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 */
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#include "cairo-test.h"

            

        

            

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#include <stddef.h>

            

        

            

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#define SIZE 10

            

        

            

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#define PAD 2

            

        

            

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static void

            

        

            

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draw_square (cairo_t *cr)

            

        

            

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{

            

        

            

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    cairo_rectangle (cr,

            

        

            

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		     PAD, PAD,

            

        

            

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		     SIZE - 2 * PAD,

            

        

            

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		     SIZE - 2 * PAD);

            

        

            

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    cairo_fill (cr);

            

        

            

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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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    cairo_surface_t *surface, *target;

            

        

            

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    cairo_t *cr2;

            

        

            

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    /* First draw a shape in blue on the original destination. */

            

        

            

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    cairo_set_source_rgb (cr, 0, 0, 1); /* blue */

            

        

            

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    draw_square (cr);

            

        

            

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    /* Then, create an offset surface and repeat the drawing in red. */

            

        

            

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    target = cairo_get_group_target (cr);

            

        

            

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    surface = cairo_surface_create_similar (target,

            

        

            

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					    cairo_surface_get_content (target),

            

        

            

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					    SIZE / 2, SIZE / 2);

            

        

            

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    cairo_surface_set_device_offset (surface, - SIZE / 2, - SIZE / 2);

            

        

            

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    cr2 = cairo_create (surface);

            

        

            

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    cairo_surface_destroy (surface);

            

        

            

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    cairo_set_source_rgb (cr2, 1, 0, 0); /* red */

            

        

            

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    draw_square (cr2);

            

        

            

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    /* Finally, copy the offset surface to the original destination.

            

        

            

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    * The final result should be a blue square with the lower-right

            

        

            

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    * quarter red. */

            

        

            

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    cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);

            

        

            

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    cairo_destroy (cr2);

            

        

            

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                3
            

            

                
    cairo_paint (cr);

            

        

            

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    return CAIRO_TEST_SUCCESS;

            

        

            

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}

            

        

            

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                1
            

            

                
CAIRO_TEST (device_offset,

            

        

            

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	    "Simple test using a surface with a negative device-offset as a source.",

            

        

            

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	    "device-offset", /* keywords */

            

        

            

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	    NULL, /* requirements */

            

        

            

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	    SIZE, SIZE,

            

        

            

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	    NULL, draw)