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/*
* Copyright © 2005 Red Hat, Inc.
*
* 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
* Red Hat, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Red Hat, Inc. makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Kristian Høgsberg <krh@redhat.com>
*/
#include <stdio.h>
#include <cairo-svg.h>
#include "cairo-test.h"
/* Test SVG clipping */
#define WIDTH_IN_POINTS 600
#define HEIGHT_IN_POINTS 600
static void
test_clip (cairo_t *cr, double width, double height)
{
cairo_t *cr2;
/* Basic test; set a square clip and draw a circle to be clipped
* against it.*/
cairo_rectangle (cr, 100, 100, 400, 400);
cairo_clip (cr);
cairo_arc (cr, 300, 300, 210, 0, 2 * M_PI);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_fill (cr);
/* Add a plus shaped clip path to the square clip and draw a big
* green square to test the new clip path. */
cairo_save (cr);
cairo_rectangle (cr, 250, 100, 100, 400);
cairo_rectangle (cr, 100, 250, 400, 100);
cairo_clip (cr);
cairo_rectangle (cr, 0, 0, 600, 600);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_fill (cr);
cairo_restore (cr);
/* Set a bezier shape in addition to the rectangle clip set before
* the cairo_save() to verify that we successfully removed the
* plus shaped clip path and can set a new clip.*/
cairo_move_to (cr, 600, 0);
cairo_curve_to (cr, 300, 600, 0, 300, 600, 0);
cairo_clip (cr);
cairo_rectangle (cr, 0, 0, 600, 600);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_fill (cr);
/* Create a new context for this surface to test overlapped
* drawing from two contexts */
cr2 = cairo_create (cairo_get_group_target (cr));
/* Using the new context, draw a black vertical line, which should
* appear unclipped on top of everything drawn so far. */
cairo_move_to (cr2, 110, 0);
cairo_line_to (cr2, 110, 600);
cairo_stroke (cr2);
/* Using the first context, draw another black vertical line.
* This line should be clipped agaist the bezier clipping path set
* earlier. */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_move_to (cr, 400, 0);
cairo_line_to (cr, 400, 600);
cairo_stroke (cr);
cairo_destroy (cr2);
/* Test reset clip. Draw a transparent black circle over
* everything. Specifically, make sure the circle extends outside
* the square clip set at the top of this function. */
cairo_reset_clip (cr);
cairo_arc (cr, 300, 300, 220, 0, 2 * M_PI);
cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
cairo_fill (cr);
}
int
main (void)
{
cairo_t *cr;
const char *filename = "svg-clip.svg";
cairo_surface_t *surface;
cairo_test_init ("svg-clip");
surface = cairo_svg_surface_create (filename,
WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
if (surface == NULL) {
fprintf (stderr, "Failed to create svg surface for file %s\n", filename);
return CAIRO_TEST_FAILURE;
}
cr = cairo_create (surface);
test_clip (cr, WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
cairo_show_page (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
printf ("svg-clip: Please check %s to make sure it looks happy.\n",
filename);
cairo_test_fini ();
return 0;
}
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