test/ft-text-antialias-none.c

   1 /*
   2  * Copyright © 2006 Jinghua Luo
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software
   5  * and its documentation for any purpose is hereby granted without
   6  * fee, provided that the above copyright notice appear in all copies
   7  * and that both that copyright notice and this permission notice
   8  * appear in supporting documentation, and that the name of
   9  * Red Hat, Inc. not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. Red Hat, Inc. makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * JINGHUA LUO DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
  18  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  21  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Author: Jinghua Luo <sunmoon1997@gmail.com>
  24  * Derived from:
  25  *  text-antialias-none.c,
  26  *  ft-font-create-for-ft-face.c.
  27  * Original Author: Carl D. Worth <cworth@cworth.org>
  28  */
  29 #include "cairo-test.h"
  30 #include <cairo-ft.h>
  31
  32 #define WIDTH  40
  33 #define HEIGHT 30
  34 #define TEXT_SIZE 12
  35
  36 static cairo_status_t
  37 create_scaled_font (cairo_t * cr,
  38                     cairo_scaled_font_t **out)
  39 {
  40     FcPattern *pattern, *resolved;
  41     FcResult result;
  42     cairo_font_face_t *font_face;
  43     cairo_scaled_font_t *scaled_font;
  44     cairo_font_options_t *font_options;
  45     cairo_matrix_t font_matrix, ctm;
  46     cairo_status_t status;
  47     double pixel_size;
  48
  49     font_options = cairo_font_options_create ();
  50
  51     cairo_get_font_options (cr, font_options);
  52
  53     pattern = FcPatternCreate ();
  54     if (pattern == NULL)
  55         return CAIRO_STATUS_NO_MEMORY;
  56
  57     FcPatternAddString (pattern, FC_FAMILY, (FcChar8 *)"Bitstream vera sans");
  58     FcPatternAddDouble (pattern, FC_SIZE, TEXT_SIZE);
  59     FcConfigSubstitute (NULL, pattern, FcMatchPattern);
  60
  61     cairo_ft_font_options_substitute (font_options, pattern);
  62
  63     FcDefaultSubstitute (pattern);
  64     resolved = FcFontMatch (NULL, pattern, &result);
  65     if (resolved == NULL) {
  66         FcPatternDestroy (pattern);
  67         return CAIRO_STATUS_NO_MEMORY;
  68     }
  69
  70     /* turn antialiasing off */
  71     FcPatternDel (resolved, FC_ANTIALIAS);
  72     FcPatternAddBool (resolved, FC_ANTIALIAS, FcFalse);
  73
  74     FcPatternGetDouble (resolved, FC_PIXEL_SIZE, 0, &pixel_size);
  75
  76     font_face = cairo_ft_font_face_create_for_pattern (resolved);
  77
  78     cairo_matrix_init_identity (&font_matrix);
  79     cairo_matrix_scale (&font_matrix, pixel_size, pixel_size);
  80
  81     cairo_get_matrix (cr, &ctm);
  82
  83     scaled_font = cairo_scaled_font_create (font_face,
  84                                             &font_matrix,
  85                                             &ctm,
  86                                             font_options);
  87
  88     cairo_font_options_destroy (font_options);
  89     cairo_font_face_destroy (font_face);
  90     FcPatternDestroy (pattern);
  91     FcPatternDestroy (resolved);
  92
  93     status = cairo_scaled_font_status (scaled_font);
  94     if (status) {
  95         cairo_scaled_font_destroy (scaled_font);
  96         return status;
  97     }
  98
  99     *out = scaled_font;
 100     return CAIRO_STATUS_SUCCESS;
 101 }
 102
 103 static cairo_test_status_t
 104 draw (cairo_t *cr, int width, int height)
 105 {
 106     cairo_text_extents_t extents;
 107     cairo_scaled_font_t *scaled_font;
 108     cairo_status_t status;
 109     const char black[] = "black", blue[] = "blue";
 110
 111     /* We draw in the default black, so paint white first. */
 112     cairo_save (cr);
 113     cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
 114     cairo_paint (cr);
 115     cairo_restore (cr);
 116
 117     status = create_scaled_font (cr, &scaled_font);
 118     if (status) {
 119         return cairo_test_status_from_status (cairo_test_get_context (cr),
 120                                               status);
 121     }
 122
 123     cairo_set_scaled_font (cr, scaled_font);
 124
 125     cairo_set_source_rgb (cr, 0, 0, 0); /* black */
 126     cairo_text_extents (cr, black, &extents);
 127     cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing);
 128     cairo_show_text (cr, black);
 129     cairo_translate (cr, 0, -extents.y_bearing + 1);
 130
 131     cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
 132     cairo_text_extents (cr, blue, &extents);
 133     cairo_move_to (cr, -extents.x_bearing, -extents.y_bearing);
 134     cairo_show_text (cr, blue);
 135
 136     cairo_scaled_font_destroy (scaled_font);
 137
 138     return CAIRO_TEST_SUCCESS;
 139 }
 140
 141 CAIRO_TEST (ft_text_antialias_none,
 142             "Tests text rendering with no antialiasing",
 143             "ft, text", /* keywords */
 144             "target=raster", /* requirements */
 145             WIDTH, HEIGHT,
 146             NULL, draw)