1/*
2 * Copyright © 2011  Google, Inc.
3 *
4 *  This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 *
24 * Google Author(s): Behdad Esfahbod
25 */
26
27#include "hb-test.h"
28
29/* Unit tests for hb-shape.h */
30
31/*
32 * This test provides a framework to test aspects of hb_shape() that are
33 * font-independent.  Please add tests for any feature that fits that
34 * description.
35 */
36
37/* TODO Make this test data-driven and add some real test data */
38/* TODO Test positions too. And test non-native direction.  Test commit 2e18c6dbdfb */
39
40
41static const char test_data[] = "test\0data";
42
43static hb_position_t
44glyph_h_advance_func (hb_font_t *font, void *font_data,
45		      hb_codepoint_t glyph,
46		      void *user_data)
47{
48  switch (glyph) {
49  case 1: return 10;
50  case 2: return 6;
51  case 3: return 5;
52  }
53  return 0;
54}
55
56static hb_bool_t
57glyph_func (hb_font_t *font, void *font_data,
58	    hb_codepoint_t unicode, hb_codepoint_t variant_selector,
59	    hb_codepoint_t *glyph,
60	    void *user_data)
61{
62  switch (unicode) {
63  case 'T': *glyph = 1; return TRUE;
64  case 'e': *glyph = 2; return TRUE;
65  case 's': *glyph = 3; return TRUE;
66  }
67  return FALSE;
68}
69
70static hb_position_t
71glyph_h_kerning_func (hb_font_t *font, void *font_data,
72		      hb_codepoint_t left, hb_codepoint_t right,
73		      void *user_data)
74{
75  if (left == 1 && right == 2)
76    return -2;
77
78  return 0;
79}
80
81static const char TesT[] = "TesT";
82
83static void
84test_shape (void)
85{
86  hb_blob_t *blob;
87  hb_face_t *face;
88  hb_font_funcs_t *ffuncs;
89  hb_font_t *font;
90  hb_buffer_t *buffer;
91  unsigned int len;
92  hb_glyph_info_t *glyphs;
93  hb_glyph_position_t *positions;
94
95  blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
96  face = hb_face_create (blob, 0);
97  hb_blob_destroy (blob);
98  font = hb_font_create (face);
99  hb_face_destroy (face);
100  hb_font_set_scale (font, 10, 10);
101
102  ffuncs = hb_font_funcs_create ();
103  hb_font_funcs_set_glyph_h_advance_func (ffuncs, glyph_h_advance_func, NULL, NULL);
104  hb_font_funcs_set_glyph_func (ffuncs, glyph_func, malloc (10), free);
105  hb_font_funcs_set_glyph_h_kerning_func (ffuncs, glyph_h_kerning_func, NULL, NULL);
106  hb_font_set_funcs (font, ffuncs, NULL, NULL);
107  hb_font_funcs_destroy (ffuncs);
108
109  buffer =  hb_buffer_create ();
110  hb_buffer_set_direction (buffer, HB_DIRECTION_LTR);
111  hb_buffer_add_utf8 (buffer, TesT, 4, 0, 4);
112
113  hb_shape (font, buffer, NULL, 0);
114
115  len = hb_buffer_get_length (buffer);
116  glyphs = hb_buffer_get_glyph_infos (buffer, NULL);
117  positions = hb_buffer_get_glyph_positions (buffer, NULL);
118
119  {
120    const hb_codepoint_t output_glyphs[] = {1, 2, 3, 1};
121    const hb_position_t output_x_advances[] = {9, 5, 5, 10};
122    const hb_position_t output_x_offsets[] = {0, -1, 0, 0};
123    unsigned int i;
124    g_assert_cmpint (len, ==, 4);
125    for (i = 0; i < len; i++) {
126      g_assert_cmphex (glyphs[i].codepoint, ==, output_glyphs[i]);
127      g_assert_cmphex (glyphs[i].cluster,   ==, i);
128    }
129    for (i = 0; i < len; i++) {
130      g_assert_cmpint (output_x_advances[i], ==, positions[i].x_advance);
131      g_assert_cmpint (output_x_offsets [i], ==, positions[i].x_offset);
132      g_assert_cmpint (0, ==, positions[i].y_advance);
133      g_assert_cmpint (0, ==, positions[i].y_offset);
134    }
135  }
136
137  hb_buffer_destroy (buffer);
138  hb_font_destroy (font);
139}
140
141static void
142test_shape_clusters (void)
143{
144  hb_face_t *face;
145  hb_font_t *font;
146  hb_buffer_t *buffer;
147  unsigned int len;
148  hb_glyph_info_t *glyphs;
149
150  face = hb_face_create (NULL, 0);
151  font = hb_font_create (face);
152  hb_face_destroy (face);
153
154  buffer =  hb_buffer_create ();
155  hb_buffer_set_direction (buffer, HB_DIRECTION_LTR);
156  {
157    /* https://code.google.com/p/chromium/issues/detail?id=497578 */
158    hb_codepoint_t test[] = {0xFFF1, 0xF0B6};
159    hb_buffer_add_utf32 (buffer, test, 2, 0, 2);
160  }
161
162  hb_shape (font, buffer, NULL, 0);
163
164  len = hb_buffer_get_length (buffer);
165  glyphs = hb_buffer_get_glyph_infos (buffer, NULL);
166
167  {
168    const hb_codepoint_t output_glyphs[] = {0};
169    const hb_position_t output_clusters[] = {0};
170    unsigned int i;
171    g_assert_cmpint (len, ==, 1);
172    for (i = 0; i < len; i++) {
173      g_assert_cmphex (glyphs[i].codepoint, ==, output_glyphs[i]);
174      g_assert_cmphex (glyphs[i].cluster,   ==, output_clusters[i]);
175    }
176  }
177
178  hb_buffer_destroy (buffer);
179  hb_font_destroy (font);
180}
181
182
183static void
184test_shape_list (void)
185{
186  const char **shapers = hb_shape_list_shapers ();
187
188  unsigned int i;
189  for (i = 0; shapers[i]; i++)
190    ;
191
192  g_assert_cmpint (i, >, 1);
193  g_assert (!strcmp (shapers[i - 1], "fallback"));
194}
195
196int
197main (int argc, char **argv)
198{
199  hb_test_init (&argc, &argv);
200
201  hb_test_add (test_shape);
202  hb_test_add (test_shape_clusters);
203  /* TODO test fallback shaper */
204  /* TODO test shaper_full */
205  hb_test_add (test_shape_list);
206
207  return hb_test_run();
208}
209