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9208df1630
There were no tests for any subpixel order but rgb, so let's write something for all four possibilities. This is mostly copy&paste from test/text-antialias.c (and text-antialias-subpixel-rgb does the same thing as text-antialias-subpixel). Test for: https://bugs.freedesktop.org/show_bug.cgi?id=40456 Signed-off-by: Uli Schlachter <psychon@znc.in>
123 lines
4 KiB
C
123 lines
4 KiB
C
/*
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* Copyright © 2005 Red Hat, Inc.
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* Copyright © 2011 Uli Schlachter
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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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* Red Hat, 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. Red Hat, 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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* RED HAT, 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: Uli Schlachter <psychon@znc.in>
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*
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* Based on test/text-antialias.c
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define WIDTH 31
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#define HEIGHT 22
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#define TEXT_SIZE 12
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static cairo_test_status_t
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draw (cairo_t *cr, cairo_subpixel_order_t order)
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{
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cairo_text_extents_t extents;
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cairo_font_options_t *font_options;
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const char black[] = "black", blue[] = "blue";
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cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
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cairo_paint (cr);
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cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " 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 (cr, TEXT_SIZE);
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font_options = cairo_font_options_create ();
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cairo_get_font_options (cr, font_options);
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cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_SUBPIXEL);
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cairo_font_options_set_subpixel_order (font_options, order);
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cairo_set_font_options (cr, font_options);
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cairo_font_options_destroy (font_options);
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cairo_set_source_rgb (cr, 0, 0, 0); /* black */
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cairo_text_extents (cr, black, &extents);
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cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing);
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cairo_show_text (cr, black);
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cairo_translate (cr, 0, -extents.y_bearing + 1);
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cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
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cairo_text_extents (cr, blue, &extents);
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cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing);
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cairo_show_text (cr, blue);
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return CAIRO_TEST_SUCCESS;
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}
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static cairo_test_status_t
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draw_rgb (cairo_t *cr, int width, int height)
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{
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return draw (cr, CAIRO_SUBPIXEL_ORDER_RGB);
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}
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static cairo_test_status_t
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draw_bgr (cairo_t *cr, int width, int height)
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{
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return draw (cr, CAIRO_SUBPIXEL_ORDER_BGR);
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}
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static cairo_test_status_t
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draw_vrgb (cairo_t *cr, int width, int height)
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{
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return draw (cr, CAIRO_SUBPIXEL_ORDER_VRGB);
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}
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static cairo_test_status_t
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draw_vbgr (cairo_t *cr, int width, int height)
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{
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return draw (cr, CAIRO_SUBPIXEL_ORDER_VBGR);
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}
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CAIRO_TEST (text_antialias_subpixel_rgb,
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"Tests text rendering with rgb subpixel antialiasing",
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"text", /* keywords */
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"target=raster", /* requirements */
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WIDTH, HEIGHT,
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NULL, draw_rgb)
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CAIRO_TEST (text_antialias_subpixel_bgr,
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"Tests text rendering with bgr subpixel antialiasing",
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"text", /* keywords */
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"target=raster", /* requirements */
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WIDTH, HEIGHT,
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NULL, draw_bgr)
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CAIRO_TEST (text_antialias_subpixel_vrgb,
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"Tests text rendering with vertical rgb subpixel antialiasing",
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"text", /* keywords */
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"target=raster", /* requirements */
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WIDTH, HEIGHT,
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NULL, draw_vrgb)
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CAIRO_TEST (text_antialias_subpixel_vbgr,
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"Tests text rendering with vertical bgr subpixel antialiasing",
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"text", /* keywords */
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"target=raster", /* requirements */
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WIDTH, HEIGHT,
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NULL, draw_vbgr)
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