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Add a testcase for subpixel positioning

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With the image compositor, you can see different
phases. The XLib compositor always uses the same
glyph rendering.
This commit is contained in:
Matthias Clasen 2019-05-24 20:40:00 +00:00 • committed by Behdad Esfahbod
parent ea9329215d
commit 6fd4222ab0
2 changed files with 69 additions and 0 deletions
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1
test/Makefile.sources
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@ -357,6 +357,7 @@ test_sources = \
text-glyph-range.c \
text-pattern.c \
text-rotate.c \
text-subpixel.c \
text-transform.c \
text-unhinted-metrics.c \
text-zero-len.c \

68
test/text-subpixel.c Normal file
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@ -0,0 +1,68 @@
/*
* Copyright © 2019 Matthias Clasen
*
* 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: Adrian Johnson <ajohnson@redneon.com>
*/
#include "cairo-test.h"
#define WIDTH 300
#define HEIGHT 200
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_font_options_t *font_options;
double size, y;
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY "DejaVu Sans Mono",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
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_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
cairo_set_font_options (cr, font_options);
cairo_font_options_destroy (font_options);
y = 0.0;
cairo_set_source_rgb (cr, 0, 0, 0);
for (size = 10.0; size <= 40.0; size += 3.3) {
cairo_set_font_size (cr, size);
y += size + 2.3;
cairo_move_to (cr, 5, y);
cairo_show_text (cr, "aaaaaaaaaa");
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (text_subpixel_positioning,
"Test subpixel positioning",
"text, font", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, draw)