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
41 static const char test_data[] = "test\0data";
42
43 static hb_position_t
glyph_h_advance_func(hb_font_t * font,void * font_data,hb_codepoint_t glyph,void * user_data)44 glyph_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
56 static hb_bool_t
glyph_func(hb_font_t * font,void * font_data,hb_codepoint_t unicode,hb_codepoint_t variant_selector,hb_codepoint_t * glyph,void * user_data)57 glyph_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
70 static hb_position_t
glyph_h_kerning_func(hb_font_t * font,void * font_data,hb_codepoint_t left,hb_codepoint_t right,void * user_data)71 glyph_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
81 static const char TesT[] = "TesT";
82
83 static void
test_shape(void)84 test_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, NULL, NULL);
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
141 static void
test_shape_list(void)142 test_shape_list (void)
143 {
144 const char **shapers = hb_shape_list_shapers ();
145
146 unsigned int i;
147 for (i = 0; shapers[i]; i++)
148 ;
149
150 g_assert_cmpint (i, >, 1);
151 g_assert (!strcmp (shapers[i - 1], "fallback"));
152 }
153
154 int
main(int argc,char ** argv)155 main (int argc, char **argv)
156 {
157 hb_test_init (&argc, &argv);
158
159 hb_test_add (test_shape);
160 /* TODO test fallback shaper */
161 /* TODO test shaper_full */
162 hb_test_add (test_shape_list);
163
164 return hb_test_run();
165 }
166