From fe4af195a7880336894a5fbae86740ef55c14cbf Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sun, 30 Nov 2008 13:48:11 +0000 Subject: [PATCH] [test] Add a rectilinear-dash test case. Exercise dashing on pixel-aligned boundaries to test extending the rectilinear stroker to handle dashes. --- test/Makefile.am | 2 + test/rectilinear-dash.c | 176 ++++++++++++++++++++++++++++++++++ test/rectilinear-dash.ref.png | Bin 0 -> 291 bytes 3 files changed, 178 insertions(+) create mode 100644 test/rectilinear-dash.c create mode 100644 test/rectilinear-dash.ref.png diff --git a/test/Makefile.am b/test/Makefile.am index 769493b82..0d1a9f265 100644 --- a/test/Makefile.am +++ b/test/Makefile.am @@ -138,6 +138,7 @@ test_sources = \ rectangle-rounding-error.c \ rectilinear-fill.c \ rectilinear-miter-limit.c \ + rectilinear-dash.c \ rectilinear-stroke.c \ reflected-stroke.c \ rel-path.c \ @@ -791,6 +792,7 @@ REFERENCE_IMAGES = \ rectilinear-miter-limit.ref.png \ rectilinear-miter-limit.ps2.ref.png \ rectilinear-miter-limit.ps3.ref.png \ + rectilinear-dash.ref.png \ rectilinear-stroke.ref.png \ reflected-stroke.ref.png \ reflected-stroke.ps2.ref.png \ diff --git a/test/rectilinear-dash.c b/test/rectilinear-dash.c new file mode 100644 index 000000000..fe998bb04 --- /dev/null +++ b/test/rectilinear-dash.c @@ -0,0 +1,176 @@ +/* + * Copyright © 2006 Red Hat, Inc. + * Copyright © 2008 Chris Wilson + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Author: Carl D. Worth + * Chris Wilson + * + * Based on the original test/rectilinear-stroke.c by Carl D. Worth. + */ + +#include "cairo-test.h" + +#define SIZE 50 + +static void +draw_dashes (cairo_t *cr) +{ + const double dash_square[4] = {4, 2, 2, 2}; + const double dash_butt[4] = {5, 1, 3, 1}; + + cairo_save (cr); + + cairo_set_dash (cr, dash_square, 4, 0); + + cairo_set_line_width (cr, 1.0); + cairo_translate (cr, 1, 1); + + /* Draw everything first with square caps. */ + cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); + + /* Draw horizontal and vertical segments, each in both + * directions. */ + cairo_move_to (cr, 4.5, 0.5); + cairo_rel_line_to (cr, 2.0, 0.0); + + cairo_move_to (cr, 10.5, 4.5); + cairo_rel_line_to (cr, 0.0, 2.0); + + cairo_move_to (cr, 6.5, 10.5); + cairo_rel_line_to (cr, -2.0, 0.0); + + cairo_move_to (cr, 0.5, 6.5); + cairo_rel_line_to (cr, 0.0, -2.0); + + /* Draw right angle turns in four directions. */ + cairo_move_to (cr, 0.5, 2.5); + cairo_rel_line_to (cr, 0.0, -2.0); + cairo_rel_line_to (cr, 2.0, 0.0); + + cairo_move_to (cr, 8.5, 0.5); + cairo_rel_line_to (cr, 2.0, 0.0); + cairo_rel_line_to (cr, 0.0, 2.0); + + cairo_move_to (cr, 10.5, 8.5); + cairo_rel_line_to (cr, 0.0, 2.0); + cairo_rel_line_to (cr, -2.0, 0.0); + + cairo_move_to (cr, 2.5, 10.5); + cairo_rel_line_to (cr, -2.0, 0.0); + cairo_rel_line_to (cr, 0.0, -2.0); + + cairo_stroke (cr); + + /* Draw a closed-path rectangle */ + cairo_rectangle (cr, 0.5, 12.5, 10.0, 10.0); + cairo_set_dash (cr, dash_square, 4, 2); + cairo_stroke (cr); + + cairo_translate (cr, 12, 0); + + /* Now draw the same results, but with butt caps. */ + cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); + cairo_set_dash (cr, dash_butt, 4, 0.0); + + /* Draw horizontal and vertical segments, each in both + * directions. */ + cairo_move_to (cr, 4.0, 0.5); + cairo_rel_line_to (cr, 3.0, 0.0); + + cairo_move_to (cr, 10.5, 4.0); + cairo_rel_line_to (cr, 0.0, 3.0); + + cairo_move_to (cr, 7.0, 10.5); + cairo_rel_line_to (cr, -3.0, 0.0); + + cairo_move_to (cr, 0.5, 7.0); + cairo_rel_line_to (cr, 0.0, -3.0); + + /* Draw right angle turns in four directions. */ + cairo_move_to (cr, 0.5, 3.0); + cairo_rel_line_to (cr, 0.0, -2.5); + cairo_rel_line_to (cr, 2.5, 0.0); + + cairo_move_to (cr, 8.0, 0.5); + cairo_rel_line_to (cr, 2.5, 0.0); + cairo_rel_line_to (cr, 0.0, 2.5); + + cairo_move_to (cr, 10.5, 8.0); + cairo_rel_line_to (cr, 0.0, 2.5); + cairo_rel_line_to (cr, -2.5, 0.0); + + cairo_move_to (cr, 3.0, 10.5); + cairo_rel_line_to (cr, -2.5, 0.0); + cairo_rel_line_to (cr, 0.0, -2.5); + + cairo_stroke (cr); + + /* Draw a closed-path rectangle */ + cairo_set_dash (cr, dash_butt, 4, 2.5); + cairo_rectangle (cr, 0.5, 12.5, 10.0, 10.0); + cairo_stroke (cr); + + cairo_restore (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + /* Paint background white, then draw in black. */ + cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); + cairo_paint (cr); + + cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); + draw_dashes (cr); + + cairo_save (cr); + cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); + cairo_translate (cr, 0, height); + cairo_scale (cr, 1, -1); + draw_dashes (cr); + cairo_restore (cr); + + cairo_save (cr); + cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); + cairo_translate (cr, width, 0); + cairo_scale (cr, -1, 1); + draw_dashes (cr); + cairo_restore (cr); + + cairo_save (cr); + cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); + cairo_translate (cr, width, height); + cairo_scale (cr, -1, -1); + draw_dashes (cr); + cairo_restore (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (rectilinear_dash, + "Test dashed rectilinear stroke operations (covering only whole pixels)", + "stroke dash", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw) + diff --git a/test/rectilinear-dash.ref.png b/test/rectilinear-dash.ref.png new file mode 100644 index 0000000000000000000000000000000000000000..33e7851e7747757557af497e2a9f9167c684d416 GIT binary patch literal 291 zcmeAS@N?(olHy`uVBq!ia0vp^Mj*_=1SBWM%0B~AY)RhkE)4%caKYZ?lYt^PJY5_^ zB3j>uUgSEWz~g=V-~Z{w{CSJ=%2&VGp}rk6IZH*cW7AqkKOvW2Y(MYG6xd!p z^GAw-MS9ZCgL7uReaHHr|MHh>ZB;DcOZLn0b{XD1o#5B|LcsMlSHA9pwaR{%OFgGO zyt!wBd-LaAET=!@#Jvbqezo>S=SJcCPEW%4T_EaiblL{UCCRZ^9(f*m>+~YglY8ub zI2x~<^g>{&?tf#g{{3=i_joOG7RlA#v$bLSISXIky3?`y(}Gk3^N;%V%>5yzw7p8< hR#-(gBar{*AiIQOvx{7tr!mlv44$rjF6*2UngDRpdXxYF literal 0 HcmV?d00001