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      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
     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
     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
     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
     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
    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
    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