diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/get-path-extents.c')
-rw-r--r-- | libs/cairo-1.16.0/test/get-path-extents.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/get-path-extents.c b/libs/cairo-1.16.0/test/get-path-extents.c new file mode 100644 index 0000000..080fc34 --- /dev/null +++ b/libs/cairo-1.16.0/test/get-path-extents.c @@ -0,0 +1,443 @@ +/* + * Copyright © 2006 Novell, 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 + * Novell, Inc. not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Novell, Inc. makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * NOVELL, 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: Robert O'Callahan <rocallahan@novell.com> + */ + +#include "cairo-test.h" +#include <stddef.h> +#include <math.h> + +enum ExtentsType { FILL, STROKE, PATH }; + +enum Relation { EQUALS, APPROX_EQUALS, CONTAINS }; + + +static cairo_bool_t within_tolerance(double x1, double y1, + double x2, double y2, + double expected_x1, double expected_y1, + double expected_x2, double expected_y2, + double tolerance) +{ + return (fabs (expected_x1 - x1) < tolerance && + fabs (expected_y1 - y1) < tolerance && + fabs (expected_x2 - x2) < tolerance && + fabs (expected_y2 - y2) < tolerance); +} + +static cairo_bool_t +check_extents (const cairo_test_context_t *ctx, + const char *message, cairo_t *cr, enum ExtentsType type, + enum Relation relation, + double x, double y, double width, double height) +{ + double ext_x1, ext_y1, ext_x2, ext_y2; + const char *type_string; + const char *relation_string; + + switch (type) { + default: + case FILL: + type_string = "fill"; + cairo_fill_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2); + break; + case STROKE: + type_string = "stroke"; + cairo_stroke_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2); + break; + case PATH: + type_string = "path"; + cairo_path_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2); + break; + } + + /* ignore results after an error occurs */ + if (cairo_status (cr)) + return 1; + + switch (relation) { + default: + case EQUALS: + relation_string = "equal"; + if (within_tolerance(x, y, x + width, y + height, + ext_x1, ext_y1, ext_x2, ext_y2, + cairo_get_tolerance(cr))) + return 1; + break; + case APPROX_EQUALS: + relation_string = "approx. equal"; + if (within_tolerance(x, y, x + width, y + height, + ext_x1, ext_y1, ext_x2, ext_y2, + 1.)) + return 1; + break; + case CONTAINS: + relation_string = "contain"; + if (width == 0 || height == 0) { + /* odd test that doesn't really test anything... */ + return 1; + } + if (ext_x1 <= x && ext_y1 <= y && ext_x2 >= x + width && ext_y2 >= y + height) + return 1; + break; + } + + cairo_test_log (ctx, "Error: %s; %s extents (%g, %g) x (%g, %g) should %s (%g, %g) x (%g, %g)\n", + message, type_string, + ext_x1, ext_y1, ext_x2 - ext_x1, ext_y2 - ext_y1, + relation_string, + x, y, width, height); + return 0; +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const cairo_test_context_t *ctx = cairo_test_get_context (cr); + cairo_surface_t *surface; + cairo_t *cr2; + const char *phase; + const char string[] = "The quick brown fox jumps over the lazy dog."; + cairo_text_extents_t extents, scaled_font_extents; + cairo_status_t status; + int errors = 0; + + surface = cairo_surface_create_similar (cairo_get_group_target (cr), + CAIRO_CONTENT_COLOR, 1000, 1000); + /* don't use cr accidentally */ + cr = NULL; + cr2 = cairo_create (surface); + cairo_surface_destroy (surface); + + cairo_set_line_width (cr2, 10); + cairo_set_line_join (cr2, CAIRO_LINE_JOIN_MITER); + cairo_set_miter_limit (cr2, 100); + + phase = "No path"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 0, 0, 0, 0); + + cairo_save (cr2); + + cairo_new_path (cr2); + cairo_move_to (cr2, 200, 400); + cairo_close_path (cr2); + phase = "Degenerate closed path"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + cairo_new_path (cr2); + cairo_move_to (cr2, 200, 400); + cairo_rel_line_to (cr2, 0., 0.); + phase = "Degenerate line"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + cairo_new_path (cr2); + cairo_move_to (cr2, 200, 400); + cairo_rel_curve_to (cr2, 0., 0., 0., 0., 0., 0.); + phase = "Degenerate curve"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + cairo_new_path (cr2); + cairo_arc (cr2, 200, 400, 0., 0, 2 * M_PI); + phase = "Degenerate arc (R=0)"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + cairo_new_path (cr2); + cairo_arc_negative (cr2, 200, 400, 0., 0, 2 * M_PI); + phase = "Degenerate negative arc (R=0)"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + cairo_new_path (cr2); + cairo_arc (cr2, 200, 400, 10., 0, 0); + phase = "Degenerate arc (Θ=0)"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 210, 400, 0, 0); + + cairo_new_path (cr2); + cairo_arc_negative (cr2, 200, 400, 10., 0, 0); + phase = "Degenerate negative arc (Θ=0)"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 210, 400, 0, 0); + + cairo_new_path (cr2); + cairo_restore (cr2); + + /* Test that with CAIRO_LINE_CAP_ROUND, we get "dots" from + * cairo_move_to; cairo_rel_line_to(0,0) */ + cairo_save (cr2); + + cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND); + cairo_set_line_width (cr2, 20); + + cairo_move_to (cr2, 200, 400); + cairo_rel_line_to (cr2, 0, 0); + phase = "Single 'dot'"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 190, 390, 20, 20); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 200, 400, 0, 0); + + /* Add another dot without starting a new path */ + cairo_move_to (cr2, 100, 500); + cairo_rel_line_to (cr2, 0, 0); + phase = "Multiple 'dots'"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 90, 390, 120, 120); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 100, 400, 100, 100); + + cairo_new_path (cr2); + + cairo_restore (cr2); + + /* https://bugs.freedesktop.org/show_bug.cgi?id=7965 */ + phase = "A horizontal, open path"; + cairo_save (cr2); + cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND); + cairo_set_line_join (cr2, CAIRO_LINE_JOIN_ROUND); + cairo_move_to (cr2, 0, 180); + cairo_line_to (cr2, 750, 180); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, -5, 175, 760, 10); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 0, 180, 750, 0); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "A vertical, open path"; + cairo_save (cr2); + cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND); + cairo_set_line_join (cr2, CAIRO_LINE_JOIN_ROUND); + cairo_new_path (cr2); + cairo_move_to (cr2, 180, 0); + cairo_line_to (cr2, 180, 750); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 175, -5, 10, 760); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 180, 0, 0, 750); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "A degenerate open path"; + cairo_save (cr2); + cairo_set_line_cap (cr2, CAIRO_LINE_CAP_ROUND); + cairo_set_line_join (cr2, CAIRO_LINE_JOIN_ROUND); + cairo_new_path (cr2); + cairo_move_to (cr2, 180, 0); + cairo_line_to (cr2, 180, 0); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 0, 0, 0, 0); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 175, -5, 10, 10); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 180, 0, 0, 0); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "Simple rect"; + cairo_save (cr2); + cairo_rectangle (cr2, 10, 10, 80, 80); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 90, 90); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 80, 80); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "Two rects"; + cairo_save (cr2); + cairo_rectangle (cr2, 10, 10, 10, 10); + cairo_rectangle (cr2, 20, 20, 10, 10); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 20, 20); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 30, 30); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 20, 20); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "Triangle"; + cairo_save (cr2); + cairo_move_to (cr2, 10, 10); + cairo_line_to (cr2, 90, 90); + cairo_line_to (cr2, 90, 10); + cairo_close_path (cr2); + /* miter joins protrude 5*(1+sqrt(2)) above the top-left corner and to + the right of the bottom-right corner */ + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80); + errors += !check_extents (ctx, phase, cr2, STROKE, CONTAINS, 0, 5, 95, 95); + errors += !check_extents (ctx, phase, cr2, PATH, CONTAINS, 10, 10, 80, 80); + cairo_new_path (cr2); + cairo_restore (cr2); + + cairo_save (cr2); + + cairo_set_line_width (cr2, 4); + + cairo_rectangle (cr2, 10, 10, 30, 30); + cairo_rectangle (cr2, 25, 10, 15, 30); + + cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_EVEN_ODD); + phase = "EVEN_ODD overlapping rectangles"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30); + + /* Test other fill rule with the same path. */ + + cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_WINDING); + phase = "WINDING overlapping rectangles"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 30, 30); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30); + + /* Now, change the direction of the second rectangle and test both + * fill rules again. */ + cairo_new_path (cr2); + cairo_rectangle (cr2, 10, 10, 30, 30); + cairo_rectangle (cr2, 25, 40, 15, -30); + + cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_EVEN_ODD); + phase = "EVEN_ODD overlapping rectangles"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30); + + /* Test other fill rule with the same path. */ + + cairo_set_fill_rule (cr2, CAIRO_FILL_RULE_WINDING); + phase = "WINDING overlapping rectangles"; + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 15, 30); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 8, 8, 34, 34); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 30, 30); + + cairo_new_path (cr2); + + cairo_restore (cr2); + + /* https://bugs.freedesktop.org/show_bug.cgi?id=7245 */ + phase = "Arc"; + cairo_save (cr2); + cairo_arc (cr2, 250.0, 250.0, 157.0, 5.147, 3.432); + cairo_set_line_width (cr2, 154.0); + errors += !check_extents (ctx, phase, cr2, STROKE, APPROX_EQUALS, 16, 38, 468, 446); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "Text"; + cairo_save (cr2); + cairo_select_font_face (cr2, CAIRO_TEST_FONT_FAMILY " Sans", + CAIRO_FONT_SLANT_NORMAL, + CAIRO_FONT_WEIGHT_NORMAL); + cairo_set_font_size (cr2, 12); + cairo_text_extents (cr2, string, &extents); + /* double check that the two methods of measuring the text agree... */ + cairo_scaled_font_text_extents (cairo_get_scaled_font (cr2), + string, + &scaled_font_extents); + if (memcmp (&extents, &scaled_font_extents, sizeof (extents))) { + 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", + scaled_font_extents.x_bearing, + scaled_font_extents.y_bearing, + scaled_font_extents.width, + scaled_font_extents.height, + extents.x_bearing, + extents.y_bearing, + extents.width, + extents.height); + errors++; + } + + cairo_move_to (cr2, -extents.x_bearing, -extents.y_bearing); + cairo_text_path (cr2, string); + cairo_set_line_width (cr2, 2.0); + /* XXX: We'd like to be able to use EQUALS here, but currently + * when hinting is enabled freetype returns integer extents. See + * https://cairographics.org/todo */ + errors += !check_extents (ctx, phase, cr2, FILL, APPROX_EQUALS, + 0, 0, extents.width, extents.height); + errors += !check_extents (ctx, phase, cr2, STROKE, APPROX_EQUALS, + -1, -1, extents.width+2, extents.height+2); + errors += !check_extents (ctx, phase, cr2, PATH, APPROX_EQUALS, + 0, 0, extents.width, extents.height); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "User space, simple scale, getting extents with same transform"; + cairo_save (cr2); + cairo_scale (cr2, 2, 2); + cairo_rectangle (cr2, 5, 5, 40, 40); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 5, 5, 40, 40); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 0, 0, 50, 50); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 5, 5, 40, 40); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "User space, simple scale, getting extents with no transform"; + cairo_save (cr2); + cairo_save (cr2); + cairo_scale (cr2, 2, 2); + cairo_rectangle (cr2, 5, 5, 40, 40); + cairo_restore (cr2); + errors += !check_extents (ctx, phase, cr2, FILL, EQUALS, 10, 10, 80, 80); + errors += !check_extents (ctx, phase, cr2, STROKE, EQUALS, 5, 5, 90, 90); + errors += !check_extents (ctx, phase, cr2, PATH, EQUALS, 10, 10, 80, 80); + cairo_new_path (cr2); + cairo_restore (cr2); + + phase = "User space, rotation, getting extents with transform"; + cairo_save (cr2); + cairo_rectangle (cr2, -50, -50, 50, 50); + cairo_rotate (cr2, -M_PI/4); + /* the path in user space is now (nearly) the square rotated by + 45 degrees about the origin. Thus its x1 and x2 are both nearly 0. + This should show any bugs where we just transform device-space + x1,y1 and x2,y2 to get the extents. */ + /* The largest axis-aligned square inside the rotated path has + side lengths 50*sqrt(2), so a bit over 35 on either side of + the axes. With the stroke width added to the rotated path, + the largest axis-aligned square is a bit over 38 on either side of + the axes. */ + errors += !check_extents (ctx, phase, cr2, FILL, CONTAINS, -35, -35, 35, 35); + errors += !check_extents (ctx, phase, cr2, STROKE, CONTAINS, -38, -38, 38, 38); + errors += !check_extents (ctx, phase, cr2, PATH, CONTAINS, -35, -35, 35, 35); + cairo_new_path (cr2); + cairo_restore (cr2); + + status = cairo_status (cr2); + cairo_destroy (cr2); + + if (status) + return cairo_test_status_from_status (ctx, status); + + return errors == 0 ? CAIRO_TEST_SUCCESS : CAIRO_TEST_FAILURE; +} + +CAIRO_TEST (get_path_extents, + "Test cairo_fill_extents and cairo_stroke_extents", + "extents, path", /* keywords */ + NULL, /* requirements */ + 0, 0, + NULL, draw) |