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Diffstat (limited to 'test/text-antialias.c')
| -rw-r--r-- | test/text-antialias.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/test/text-antialias.c b/test/text-antialias.c new file mode 100644 index 000000000..7d338925e --- /dev/null +++ b/test/text-antialias.c @@ -0,0 +1,106 @@ +/* + * Copyright © 2005 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> + */ + +#include "cairo-test.h" + +#define WIDTH 31 +#define HEIGHT 22 +#define TEXT_SIZE 12 + +static cairo_test_status_t +draw (cairo_t *cr, cairo_antialias_t antialias) +{ + cairo_text_extents_t extents; + cairo_font_options_t *font_options; + const char black[] = "black", blue[] = "blue"; + + cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */ + 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_antialias (font_options, antialias); + cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_RGB); + cairo_set_font_options (cr, font_options); + + cairo_font_options_destroy (font_options); + + cairo_set_source_rgb (cr, 0, 0, 0); /* black */ + cairo_text_extents (cr, black, &extents); + cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing); + cairo_show_text (cr, black); + cairo_translate (cr, 0, -extents.y_bearing + 1); + + cairo_set_source_rgb (cr, 0, 0, 1); /* blue */ + cairo_text_extents (cr, blue, &extents); + cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing); + cairo_show_text (cr, blue); + + return CAIRO_TEST_SUCCESS; +} + +static cairo_test_status_t +draw_gray (cairo_t *cr, int width, int height) +{ + return draw (cr, CAIRO_ANTIALIAS_GRAY); +} + +static cairo_test_status_t +draw_none (cairo_t *cr, int width, int height) +{ + return draw (cr, CAIRO_ANTIALIAS_NONE); +} + +static cairo_test_status_t +draw_subpixel (cairo_t *cr, int width, int height) +{ + return draw (cr, CAIRO_ANTIALIAS_SUBPIXEL); +} + +CAIRO_TEST (text_antialias_gray, + "Tests text rendering with grayscale antialiasing", + "text", /* keywords */ + "target=raster", /* requirements */ + WIDTH, HEIGHT, + NULL, draw_gray) + +CAIRO_TEST (text_antialias_none, + "Tests text rendering with no antialiasing", + "text", /* keywords */ + "target=raster", /* requirements */ + WIDTH, HEIGHT, + NULL, draw_none) + +CAIRO_TEST (text_antialias_subpixel, + "Tests text rendering with subpixel antialiasing", + "text", /* keywords */ + "target=raster", /* requirements */ + WIDTH, HEIGHT, + NULL, draw_subpixel) |