/* * 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); } static cairo_test_status_t preamble (cairo_test_context_t *ctx) { cairo_t *cr; const char *filename = "svg-clip.out.svg"; cairo_surface_t *surface; if (! cairo_test_is_target_enabled (ctx, "svg11") && ! cairo_test_is_target_enabled (ctx, "svg12")) { return CAIRO_TEST_UNTESTED; } surface = cairo_svg_surface_create (filename, WIDTH_IN_POINTS, HEIGHT_IN_POINTS); if (cairo_surface_status (surface)) { cairo_test_log (ctx, "Failed to create svg surface for file %s: %s\n", filename, cairo_status_to_string (cairo_surface_status (surface))); 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); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (svg_clip, "Test SVG clipping", "svg, clip", /* keywords */ NULL, /* requirements */ 0, 0, preamble, NULL)