test/bitmap-font.c

   1 /*
   2  * Copyright © 2005 Red Hat, Inc.
   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  * RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
  24  */
  25
  26 #include "cairo-test.h"
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31
  32 #include <cairo-ft.h>
  33 #include <fontconfig/fontconfig.h>
  34 #include <fontconfig/fcfreetype.h>
  35
  36 #define FONT "6x13.pcf"
  37 #define TEXT_SIZE 13
  38
  39 static cairo_bool_t
  40 font_extents_equal (const cairo_font_extents_t *A,
  41                     const cairo_font_extents_t *B)
  42 {
  43     return
  44         CAIRO_TEST_DOUBLE_EQUALS (A->ascent,  B->ascent)  &&
  45         CAIRO_TEST_DOUBLE_EQUALS (A->descent, B->descent) &&
  46         CAIRO_TEST_DOUBLE_EQUALS (A->height,  B->height)  &&
  47         CAIRO_TEST_DOUBLE_EQUALS (A->max_x_advance, B->max_x_advance) &&
  48         CAIRO_TEST_DOUBLE_EQUALS (A->max_y_advance, B->max_y_advance);
  49 }
  50
  51 static cairo_test_status_t
  52 check_font_extents (const cairo_test_context_t *ctx, cairo_t *cr, const char *comment)
  53 {
  54     cairo_font_extents_t font_extents, ref_font_extents = {11, 2, 13, 6, 0};
  55     cairo_status_t status;
  56
  57     memset (&font_extents, 0xff, sizeof (cairo_font_extents_t));
  58     cairo_font_extents (cr, &font_extents);
  59
  60     status = cairo_status (cr);
  61     if (status)
  62         return cairo_test_status_from_status (ctx, status);
  63
  64     if (! font_extents_equal (&font_extents, &ref_font_extents)) {
  65         cairo_test_log (ctx, "Error: %s: cairo_font_extents(); extents (%g, %g, %g, %g, %g)\n",
  66                         comment,
  67                         font_extents.ascent, font_extents.descent,
  68                         font_extents.height,
  69                         font_extents.max_x_advance, font_extents.max_y_advance);
  70         return CAIRO_TEST_FAILURE;
  71     }
  72
  73     return CAIRO_TEST_SUCCESS;
  74 }
  75
  76 static cairo_test_status_t
  77 draw (cairo_t *cr, int width, int height)
  78 {
  79     const cairo_test_context_t *ctx = cairo_test_get_context (cr);
  80     FcPattern *pattern;
  81     cairo_font_face_t *font_face;
  82     cairo_font_extents_t font_extents;
  83     cairo_font_options_t *font_options;
  84     cairo_status_t status;
  85     char *filename;
  86     int face_count;
  87     struct stat stat_buf;
  88
  89     xasprintf (&filename, "%s/%s", ctx->srcdir, FONT);
  90
  91     if (stat (filename, &stat_buf) || ! S_ISREG (stat_buf.st_mode)) {
  92         cairo_test_log (ctx, "Error finding font: %s: file not found?\n", filename);
  93         return CAIRO_TEST_FAILURE;
  94     }
  95
  96     pattern = FcFreeTypeQuery ((unsigned char *)filename, 0, NULL, &face_count);
  97     free (filename);
  98     if (! pattern) {
  99         cairo_test_log (ctx, "FcFreeTypeQuery failed.\n");
 100         return CAIRO_TEST_FAILURE;
 101     }
 102
 103     font_face = cairo_ft_font_face_create_for_pattern (pattern);
 104
 105     status = cairo_font_face_status (font_face);
 106     if (status) {
 107         cairo_test_log (ctx, "Error creating font face for %s: %s\n",
 108                         filename,
 109                         cairo_status_to_string (status));
 110         FcPatternDestroy (pattern);
 111         return CAIRO_TEST_FAILURE;
 112     }
 113
 114     if (cairo_font_face_get_type (font_face) != CAIRO_FONT_TYPE_FT) {
 115         cairo_test_log (ctx, "Unexpected value from cairo_font_face_get_type: %d (expected %d)\n",
 116                         cairo_font_face_get_type (font_face), CAIRO_FONT_TYPE_FT);
 117         cairo_font_face_destroy (font_face);
 118         FcPatternDestroy (pattern);
 119         return CAIRO_TEST_FAILURE;
 120     }
 121
 122     cairo_set_font_face (cr, font_face);
 123
 124 #define CHECK_FONT_EXTENTS(comment) if (check_font_extents (ctx, cr, (comment)) != CAIRO_TEST_SUCCESS) return CAIRO_TEST_FAILURE
 125
 126     cairo_font_extents (cr, &font_extents);
 127     CHECK_FONT_EXTENTS ("default");
 128
 129     FcPatternDestroy (pattern);
 130     cairo_font_face_destroy (font_face);
 131
 132     font_options = cairo_font_options_create ();
 133
 134     cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_ON);
 135     cairo_set_font_options (cr, font_options);
 136
 137     CHECK_FONT_EXTENTS ("HINT_METRICS_ON");
 138
 139     cairo_move_to (cr, 1, font_extents.ascent - 1);
 140     cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); /* blue */
 141
 142
 143     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
 144     cairo_set_font_options (cr, font_options);
 145     CHECK_FONT_EXTENTS ("HINT_METRICS_ON HINT_STYLE_NONE");
 146     cairo_show_text (cr, "the ");
 147
 148     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_SLIGHT);
 149     cairo_set_font_options (cr, font_options);
 150     CHECK_FONT_EXTENTS ("HINT_METRICS_ON HINT_STYLE_SLIGHT");
 151     cairo_show_text (cr, "quick ");
 152
 153     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_MEDIUM);
 154     cairo_set_font_options (cr, font_options);
 155     CHECK_FONT_EXTENTS ("HINT_METRICS_ON HINT_STYLE_MEDIUM");
 156     cairo_show_text (cr, "brown");
 157
 158     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_FULL);
 159     cairo_set_font_options (cr, font_options);
 160     CHECK_FONT_EXTENTS ("HINT_METRICS_ON HINT_STYLE_FULL");
 161     cairo_show_text (cr, " fox");
 162
 163     /* Switch from show_text to text_path/fill to exercise bug #7889 */
 164     cairo_text_path (cr, " jumps over a lazy dog");
 165     cairo_fill (cr);
 166
 167     /* And test it rotated as well for the sake of bug #7888 */
 168
 169     cairo_translate (cr, width, height);
 170     cairo_rotate (cr, M_PI);
 171
 172     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_DEFAULT);
 173     cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF);
 174     cairo_set_font_options (cr, font_options);
 175     CHECK_FONT_EXTENTS ("HINT_METRICS_OFF");
 176
 177     cairo_move_to (cr, 1, font_extents.height - font_extents.descent - 1);
 178
 179     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
 180     cairo_set_font_options (cr, font_options);
 181     CHECK_FONT_EXTENTS ("HINT_METRICS_OFF HINT_STYLE_NONE");
 182     cairo_show_text (cr, "the ");
 183
 184     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_SLIGHT);
 185     cairo_set_font_options (cr, font_options);
 186     CHECK_FONT_EXTENTS ("HINT_METRICS_OFF HINT_STYLE_SLIGHT");
 187     cairo_show_text (cr, "quick");
 188
 189     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_MEDIUM);
 190     cairo_set_font_options (cr, font_options);
 191     CHECK_FONT_EXTENTS ("HINT_METRICS_OFF HINT_STYLE_MEDIUM");
 192     cairo_show_text (cr, " brown");
 193
 194     cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_FULL);
 195     cairo_set_font_options (cr, font_options);
 196     CHECK_FONT_EXTENTS ("HINT_METRICS_OFF HINT_STYLE_FULL");
 197     cairo_show_text (cr, " fox");
 198
 199     cairo_text_path (cr, " jumps over");
 200     cairo_text_path (cr, " a lazy dog");
 201     cairo_fill (cr);
 202
 203     cairo_font_options_destroy (font_options);
 204
 205     return CAIRO_TEST_SUCCESS;
 206 }
 207
 208 CAIRO_TEST (bitmap_font,
 209             "Test drawing with a font consisting only of bitmaps"
 210             "\nThe PDF and PS backends embed a slightly distorted font for the rotated case.",
 211             "text", /* keywords */
 212             "ft", /* requirements */
 213             246 + 1, 2 * TEXT_SIZE,
 214             NULL, draw)