Grcov report - xcomposite-projection.c

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/*

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 * Copyright 2009 Benjamin Otte

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 * Permission is hereby granted, free of charge, to any person

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 * obtaining a copy of this software and associated documentation

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 * files (the "Software"), to deal in the Software without

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 * restriction, including without limitation the rights to use, copy,

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 * modify, merge, publish, distribute, sublicense, and/or sell copies

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 * of the Software, and to permit persons to whom the Software is

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 * furnished to do so, subject to the following conditions:

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 * The above copyright notice and this permission notice shall be

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 * included in all copies or substantial portions of the Software.

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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

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 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

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 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

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 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

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 * SOFTWARE.

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 * Author: Benjamin Otte <otte@gnome.org>

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*/

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#include "cairo-test.h"

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/*

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 * Exercise a bug in the projection of a rotated trapezoid mask.

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 * I used CAIRO_ANTIALIAS_NONE and a single-color source in the test to get

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 * rid of aliasing issues in the output images. This makes some issues

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 * slightly less visible, but still fails for all of them. If you want to

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 * get a clearer view:

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 * #define ANTIALIAS CAIRO_ANTIALIAS_DEFAULT

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*/

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#define ANTIALIAS CAIRO_ANTIALIAS_NONE

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static const char png_filename[] = "romedalen.png";

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static cairo_pattern_t *

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get_source (const cairo_test_context_t *ctx,

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	    int *width, int *height)

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    cairo_surface_t *surface;

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    cairo_pattern_t *pattern;

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    if (ANTIALIAS == CAIRO_ANTIALIAS_NONE) {

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	cairo_t *cr;

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	surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 256, 192);

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	cr = cairo_create (surface);

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	cairo_set_source_rgb (cr, 0.75, 0.25, 0.25);

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	cairo_paint (cr);

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	pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));

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	cairo_destroy (cr);

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    } else {

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	surface = cairo_test_create_surface_from_png (ctx, png_filename);

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	pattern = cairo_pattern_create_for_surface (surface);

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3

    *width = cairo_image_surface_get_width (surface);

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    *height = cairo_image_surface_get_height (surface);

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    cairo_surface_destroy (surface);

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    return pattern;

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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_pattern_t *image;

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    int img_width, img_height;

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    image = get_source (cairo_test_get_context (cr),

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			&img_width, &img_height);

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    /* we don't want to debug antialiasing artifacts */

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    cairo_set_antialias (cr, ANTIALIAS);

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    /* dark grey background */

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    cairo_set_source_rgb (cr, 0.25, 0.25, 0.25);

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    cairo_paint (cr);

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    /* magic transform */

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    cairo_translate (cr, 10, -40);

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    cairo_rotate (cr, -0.05);

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    /* place the image on our surface */

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    cairo_set_source (cr, image);

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    /* paint the image */

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    cairo_rectangle (cr, 0, 0, img_width, img_height);

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    cairo_fill (cr);

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    cairo_pattern_destroy (image);

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (xcomposite_projection,

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	    "Test a bug with XRenderComposite reference computation when projecting the first trapezoid onto 16.16 space",

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	    "xlib", /* keywords */

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	    "target=raster", /* requirements */

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	    300, 150,

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	    NULL, draw)