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669e7ae5c9
The bounding box of the text is rounded to the nearest pixel boundaries, so therefore the test must accept a similar level of imprecision.
387 lines
15 KiB
C
387 lines
15 KiB
C
/*
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* Copyright © 2006 Novell, 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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* Novell, 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. Novell, 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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* NOVELL, 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: Robert O'Callahan <rocallahan@novell.com>
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*/
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#include "cairo-test.h"
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#include <stddef.h>
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#include <math.h>
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enum ExtentsType { FILL, STROKE, PATH };
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enum Relation { EQUALS, APPROX_EQUALS, CONTAINS };
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static cairo_bool_t
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check_extents (const cairo_test_context_t *ctx,
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const char *message, cairo_t *cr, enum ExtentsType type,
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enum Relation relation,
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double x, double y, double width, double height)
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{
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double ext_x1, ext_y1, ext_x2, ext_y2;
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const char *type_string;
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const char *relation_string;
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switch (type) {
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default:
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case FILL:
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type_string = "fill";
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cairo_fill_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2);
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break;
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case STROKE:
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type_string = "stroke";
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cairo_stroke_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2);
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break;
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case PATH:
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type_string = "path";
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cairo_path_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2);
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break;
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}
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/* ignore results after an error occurs */
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if (cairo_status (cr))
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return 1;
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/* let empty rects match */
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if ((ext_x1 == ext_x2 || ext_y1 == ext_y2) && (width == 0 || height == 0))
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return 1;
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switch (relation) {
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default:
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case EQUALS:
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relation_string = "equal";
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if (ext_x1 == x && ext_y1 == y && ext_x2 == x + width && ext_y2 == y + height)
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return 1;
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break;
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case APPROX_EQUALS:
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relation_string = "approx. equal";
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if (fabs (ext_x1 - x) < 1. &&
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fabs (ext_y1 - y) < 1. &&
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fabs (ext_x2 - (x + width)) < 1. &&
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fabs (ext_y2 - (y + height)) < 1.)
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{
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return 1;
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}
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break;
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case CONTAINS:
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relation_string = "contain";
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if (width == 0 || height == 0) {
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/* odd test that doesn't really test anything... */
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return 1;
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}
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if (ext_x1 <= x && ext_y1 <= y && ext_x2 >= x + width && ext_y2 >= y + height)
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return 1;
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break;
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}
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cairo_test_log (ctx, "Error: %s; %s extents (%g, %g) x (%g, %g) should %s (%g, %g) x (%g, %g)\n",
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message, type_string,
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ext_x1, ext_y1, ext_x2 - ext_x1, ext_y2 - ext_y1,
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relation_string,
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x, y, width, height);
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return 0;
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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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const cairo_test_context_t *ctx = cairo_test_get_context (cr);
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cairo_surface_t *surface;
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cairo_t *cr2;
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const char *phase;
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const char string[] = "The quick brown fox jumps over the lazy dog.";
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cairo_text_extents_t extents, scaled_font_extents;
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cairo_status_t status;
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int errors = 0;
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surface = cairo_surface_create_similar (cairo_get_group_target (cr),
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CAIRO_CONTENT_COLOR, 100, 100);
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/* don't use cr accidentally */
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cr = NULL;
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cr2 = cairo_create (surface);
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cairo_surface_destroy (surface);
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cairo_set_line_width (cr2, 10);
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cairo_set_line_join (cr2, CAIRO_LINE_JOIN_MITER);
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cairo_set_miter_limit (cr2, 100);
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phase = "No path";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 0, 0, 0, 0);
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cairo_save (cr2);
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cairo_new_path (cr2);
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cairo_move_to (cr2, 200, 400);
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cairo_rel_line_to (cr2, 0., 0.);
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phase = "Degenerate line";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0);
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cairo_new_path (cr2);
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cairo_move_to (cr2, 200, 400);
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cairo_rel_curve_to (cr2, 0., 0., 0., 0., 0., 0.);
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phase = "Degenerate curve";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0);
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cairo_new_path (cr2);
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cairo_arc (cr2, 200, 400, 0., 0, 2 * M_PI);
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phase = "Degenerate arc (R=0)";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0);
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cairo_new_path (cr2);
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cairo_arc (cr2, 200, 400, 10., 0, 0);
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phase = "Degenerate arc (Θ=0)";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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/* Test that with CAIRO_LINE_CAP_ROUND, we get "dots" from
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* cairo_move_to; cairo_rel_line_to(0,0) */
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cairo_save (cr2);
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cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND);
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cairo_set_line_width (cr2, 20);
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cairo_move_to (cr2, 200, 400);
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cairo_rel_line_to (cr2, 0, 0);
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phase = "Single 'dot'";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 190, 390, 20, 20);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0);
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/* Add another dot without starting a new path */
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cairo_move_to (cr2, 100, 500);
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cairo_rel_line_to (cr2, 0, 0);
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phase = "Multiple 'dots'";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 90, 390, 120, 120);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 100, 400, 100, 100);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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/* http://bugs.freedesktop.org/show_bug.cgi?id=7965 */
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phase = "A vertical, open path";
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cairo_save (cr2);
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cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND);
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cairo_set_line_join (cr2, CAIRO_LINE_JOIN_ROUND);
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cairo_move_to (cr2, 0, 180);
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cairo_line_to (cr2, 750, 180);
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, -5, 175, 760, 10);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 0, 180, 755, 0);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "Simple rect";
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cairo_save (cr2);
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cairo_rectangle (cr2, 10, 10, 80, 80);
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 90, 90);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 80, 80);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "Two rects";
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cairo_save (cr2);
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cairo_rectangle (cr2, 10, 10, 10, 10);
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cairo_rectangle (cr2, 20, 20, 10, 10);
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 20, 20);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 30, 30);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 20, 20);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "Triangle";
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cairo_save (cr2);
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cairo_move_to (cr2, 10, 10);
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cairo_line_to (cr2, 90, 90);
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cairo_line_to (cr2, 90, 10);
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cairo_close_path (cr2);
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/* miter joins protrude 5*(1+sqrt(2)) above the top-left corner and to
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the right of the bottom-right corner */
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80);
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errors += !check_extents (ctx, phase, cr2, STROKE, CONTAINS, 0, 5, 95, 95);
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errors += !check_extents (ctx, phase, cr2, PATH, CONTAINS, 10, 10, 80, 80);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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cairo_save (cr2);
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cairo_set_line_width (cr2, 4);
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cairo_rectangle (cr2, 10, 10, 30, 30);
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cairo_rectangle (cr2, 25, 10, 15, 30);
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cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_EVEN_ODD);
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phase = "EVEN_ODD overlapping rectangles";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30);
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/* Test other fill rule with the same path. */
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cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_WINDING);
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phase = "WINDING overlapping rectangles";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 30, 30);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30);
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/* Now, change the direction of the second rectangle and test both
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* fill rules again. */
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cairo_new_path (cr2);
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cairo_rectangle (cr2, 10, 10, 30, 30);
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cairo_rectangle (cr2, 25, 40, 15, -30);
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cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_EVEN_ODD);
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phase = "EVEN_ODD overlapping rectangles";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30);
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/* Test other fill rule with the same path. */
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cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_WINDING);
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phase = "WINDING overlapping rectangles";
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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/* http://bugs.freedesktop.org/show_bug.cgi?id=7245 */
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phase = "Arc";
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cairo_save (cr2);
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cairo_arc (cr2, 250.0, 250.0, 157.0, 5.147, 3.432);
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cairo_set_line_width (cr2, 154.0);
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errors += !check_extents (ctx, phase, cr2, STROKE, APPROX_EQUALS, 16, 38, 468, 446);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "Text";
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cairo_save (cr2);
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cairo_select_font_face (cr2, "Bitstream Vera Sans",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size (cr2, 12);
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cairo_text_extents (cr2, string, &extents);
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/* double check that the two methods of measuring the text agree... */
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cairo_scaled_font_text_extents (cairo_get_scaled_font (cr2),
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string,
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&scaled_font_extents);
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if (memcmp (&extents, &scaled_font_extents, sizeof (extents))) {
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cairo_test_log (ctx, "Error: cairo_text_extents() does not match cairo_scaled_font_text_extents() - font extents (%f, %f) x (%f, %f) should be (%f, %f) x (%f, %f)\n",
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scaled_font_extents.x_bearing,
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scaled_font_extents.y_bearing,
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scaled_font_extents.width,
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scaled_font_extents.height,
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extents.x_bearing,
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extents.y_bearing,
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extents.width,
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extents.height);
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errors++;
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}
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cairo_move_to (cr2, -extents.x_bearing, -extents.y_bearing);
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cairo_text_path (cr2, string);
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cairo_set_line_width (cr2, 2.0);
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/* XXX: We'd like to be able to use EQUALS here, but currently
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* when hinting is enabled freetype returns integer extents. See
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* http://cairographics.org/todo */
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errors += !check_extents (ctx, phase, cr2, FILL, APPROX_EQUALS,
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0, 0, extents.width, extents.height);
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errors += !check_extents (ctx, phase, cr2, STROKE, APPROX_EQUALS,
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-1, -1, extents.width+2, extents.height+2);
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errors += !check_extents (ctx, phase, cr2, PATH, APPROX_EQUALS,
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0, 0, extents.width, extents.height);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "User space, simple scale, getting extents with same transform";
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cairo_save (cr2);
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cairo_scale (cr2, 2, 2);
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cairo_rectangle (cr2, 5, 5, 40, 40);
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 5, 5, 40, 40);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 50, 50);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 5, 5, 40, 40);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "User space, simple scale, getting extents with no transform";
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cairo_save (cr2);
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cairo_save (cr2);
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cairo_scale (cr2, 2, 2);
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cairo_rectangle (cr2, 5, 5, 40, 40);
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cairo_restore (cr2);
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errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80);
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errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 90, 90);
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errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 80, 80);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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phase = "User space, rotation, getting extents with transform";
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cairo_save (cr2);
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cairo_rectangle (cr2, -50, -50, 50, 50);
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cairo_rotate (cr2, -M_PI/4);
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/* the path in user space is now (nearly) the square rotated by
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45 degrees about the origin. Thus its x1 and x2 are both nearly 0.
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This should show any bugs where we just transform device-space
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x1,y1 and x2,y2 to get the extents. */
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/* The largest axis-aligned square inside the rotated path has
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side lengths 50*sqrt(2), so a bit over 35 on either side of
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the axes. With the stroke width added to the rotated path,
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the largest axis-aligned square is a bit over 38 on either side of
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the axes. */
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errors += !check_extents (ctx, phase, cr2, FILL, CONTAINS, -35, -35, 35, 35);
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errors += !check_extents (ctx, phase, cr2, STROKE, CONTAINS, -38, -38, 38, 38);
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errors += !check_extents (ctx, phase, cr2, PATH, CONTAINS, -35, -35, 35, 35);
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cairo_new_path (cr2);
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cairo_restore (cr2);
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status = cairo_status (cr2);
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cairo_destroy (cr2);
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if (status)
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return cairo_test_status_from_status (ctx, status);
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return errors == 0 ? CAIRO_TEST_SUCCESS : CAIRO_TEST_FAILURE;
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}
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CAIRO_TEST (get_path_extents,
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"Test cairo_fill_extents and cairo_stroke_extents",
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"extents, path", /* keywords */
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NULL, /* requirements */
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0, 0,
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NULL, draw)
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