diff options
Diffstat (limited to 'test/text-rotate.c')
| -rw-r--r-- | test/text-rotate.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/test/text-rotate.c b/test/text-rotate.c deleted file mode 100644 index 0a805ac67..000000000 --- a/test/text-rotate.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * Copyright © 2004 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: Carl D. Worth <cworth@cworth.org> - */ - -/* Bug history - * - * 2004-11-03 Steve Chaplin <stevech1097@yahoo.com.au> - * - * Reported bug on mailing list: - * - * From: Steve Chaplin <stevech1097@yahoo.com.au> - * To: cairo@cairographics.org - * Date: Thu, 04 Nov 2004 00:00:17 +0800 - * Subject: [cairo] Rotated text bug on drawable target - * - * The attached file draws text rotated 90 degrees first to a PNG file and - * then to a drawable. The PNG file looks fine, the text on the drawable is - * unreadable. - * - * Steve - * - * 2004-11-03 Carl Worth <cworth@cworth.org> - * - * Looks like the major problems with this bug appeared in the great - * font rework between 0.1.23 and 0.2.0. And it looks like we need - * to fix the regression test suite to test the xlib target (since - * the bug does not show up in the png backend). - * - * Hmm... Actually, things don't look perfect even in the PNG - * output. Look at how that 'o' moves around. It's particularly off - * in the case where it's rotated by PI. - * - * And I'm still not sure about what to do for test cases with - * text--a new version of freetype will change everything. We may - * need to add a simple backend for stroked fonts and add a simple - * builtin font to cairo for pixel-perfect tests with text. - * - * 2005-08-23 - * - * It appears that the worst placement and glyph selection problems - * have now been resolved. In the past some letters were noticeably - * of a different size at some rotations, and there was a lot of - * drift away from the baseline. These problems do not appear - * anymore. - * - * Another thing that helps is that we now have font options which - * we can use to disable hinting in order to get more repeatable - * results. I'm doing that in this test now. - * - * There are still some subtle positioning problems which I'm - * assuming are due to the lack of finer-than-whole-pixel glyph - * positioning. I'm generating a reference image now by replacing - * cairo_show_text with cairo_text_path; cairo_fill. This will let - * us look more closely at the remaining positioning problems. (In - * particular, I want to make sure we're rounding as well as - * possible). - * - * 2007-02-21 - * - * Seems like all the "bugs" have been fixed and all remaining is - * missing support for subpixel glyph positioning. Removing from - * XFAIL now. - */ - -#include "cairo-test.h" - -#define WIDTH 150 -#define HEIGHT 150 -#define NUM_TEXT 20 -#define TEXT_SIZE 12 - -/* Draw the word cairo at NUM_TEXT different angles. - * We separate the circle into quadrants to reduce - * numerical errors i.e. so each quarter is pixel-aligned. - */ -static void -draw_quadrant (cairo_t *cr, - const char *text, - const cairo_text_extents_t *extents, - const cairo_matrix_t *transform, - int x_off, int y_off) -{ - int i; - - for (i = 0; i < NUM_TEXT/4; i++) { - cairo_save (cr); - cairo_rotate (cr, 2*M_PI*i/NUM_TEXT); - cairo_transform (cr, transform); - cairo_set_line_width (cr, 1.0); - cairo_rectangle (cr, x_off - 0.5, y_off - 0.5, extents->width + 1, extents->height + 1); - cairo_set_source_rgb (cr, 1, 0, 0); - cairo_stroke (cr); - cairo_move_to (cr, x_off - extents->x_bearing, y_off - extents->y_bearing); - cairo_set_source_rgb (cr, 0, 0, 0); -#if CAIRO_TEST_GENERATE_REFERENCE_IMAGE - cairo_text_path (cr, text); - cairo_fill (cr); -#else - cairo_show_text (cr, text); -#endif - cairo_restore (cr); - } -} - -static cairo_test_status_t -draw (cairo_t *cr, int width, int height) -{ - cairo_text_extents_t extents; - cairo_font_options_t *font_options; - const char text[] = "cairo"; - int x_off, y_off; - cairo_matrix_t m; - - /* paint white so we don't need separate ref images for - * RGB24 and ARGB32 */ - cairo_set_source_rgb (cr, 1., 1., 1.); - cairo_paint (cr); - - cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans", - CAIRO_FONT_SLANT_NORMAL, - CAIRO_FONT_WEIGHT_NORMAL); - cairo_set_font_size (cr, TEXT_SIZE); - - font_options = cairo_font_options_create (); - - cairo_get_font_options (cr, font_options); - cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF); - - cairo_set_font_options (cr, font_options); - cairo_font_options_destroy (font_options); - - cairo_set_source_rgb (cr, 0, 0, 0); - - cairo_translate (cr, WIDTH/2.0, HEIGHT/2.0); - - cairo_text_extents (cr, text, &extents); - - if (NUM_TEXT == 1) { - x_off = y_off = 0; - } else { - y_off = - floor (0.5 + extents.height / 2.0); - x_off = floor (0.5 + (extents.height+1) / (2 * tan (M_PI/NUM_TEXT))); - } - - cairo_save (cr); - cairo_matrix_init_identity (&m); - draw_quadrant (cr, text, &extents, &m, x_off, y_off); - cairo_matrix_init (&m, 0, 1, -1, 0, 0, 0); - draw_quadrant (cr, text, &extents, &m, x_off, y_off); - cairo_restore (cr); - - cairo_save (cr); - cairo_scale (cr, -1, -1); - cairo_matrix_init_identity (&m); - draw_quadrant (cr, text, &extents, &m, x_off, y_off); - cairo_matrix_init (&m, 0, 1, -1, 0, 0, 0); - draw_quadrant (cr, text, &extents, &m, x_off, y_off); - cairo_restore (cr); - - return CAIRO_TEST_SUCCESS; -} - -CAIRO_TEST (text_rotate, - "Tests show_text under various rotations", - "text, transform", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw) |