kc3-lang/harfbuzz/test/test-shape.c

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• Hash : 02aeca98
  Author :
  Date : 2011-08-04T22:31:05
  

  [API] Changes to main shape API
  
  hb_shape() now accepts a shaper_options and a shaper_list argument.
  Both can be set to NULL to emulate previous API.  And in most situations
  they are expected to be set to NULL.
  
  hb_shape() also returns a boolean for now.  If shaper_list is NULL, the
  return value can be ignored.
  
  shaper_options is ignored for now, but otherwise it should be a
  NULL-terminated list of strings.
  
  shaper_list is a NULL-terminated list of strings.  Currently recognized
  strings are "ot" for native OpenType Layout implementation, "uniscribe"
  for the Uniscribe backend, and "fallback" for the non-complex backend
  (that will be implemented shortly).  The fallback backend never fails.
  
  The env var HB_SHAPER_LIST is also parsed and honored.  It's a
  colon-separated list of shaper names.  The fallback shaper is invoked if
  none of the env-listed shapers succeed.
  
  New API hb_buffer_guess_properties() added.
  

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• test/test-shape.c

• /*
   * Copyright © 2011  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Google Author(s): Behdad Esfahbod
   */
  
  #include "hb-test.h"
  
  /* Unit tests for hb-shape.h */
  
  /*
   * This test provides a framework to test aspects of hb_shape() that are
   * font-independent.  Please add tests for any feature that fits that
   * description.
   */
  
  /* TODO Make this test data-driven and add some real test data */
  /* TODO Test positions too. And test non-native direction.  Test commit 2e18c6dbdfb */
  
  
  static const char test_data[] = "test\0data";
  
  static hb_position_t
  glyph_h_advance_func (hb_font_t *font, void *font_data,
  		      hb_codepoint_t glyph,
  		      void *user_data)
  {
    switch (glyph) {
    case 1: return 10;
    case 2: return 6;
    case 3: return 5;
    }
    return 0;
  }
  
  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)
  {
    switch (unicode) {
    case 'T': *glyph = 1; return TRUE;
    case 'e': *glyph = 2; return TRUE;
    case 's': *glyph = 3; return TRUE;
    }
    return FALSE;
  }
  
  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)
  {
    if (left == 1 && right == 2)
      return -2;
  
    return 0;
  }
  
  static const char TesT[] = "TesT";
  
  static void
  test_shape (void)
  {
    hb_blob_t *blob;
    hb_face_t *face;
    hb_font_funcs_t *ffuncs;
    hb_font_t *font;
    hb_buffer_t *buffer;
    unsigned int len;
    hb_glyph_info_t *glyphs;
    hb_glyph_position_t *positions;
  
    blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
    face = hb_face_create (blob, 0);
    hb_blob_destroy (blob);
    font = hb_font_create (face);
    hb_face_destroy (face);
    hb_font_set_scale (font, 10, 10);
  
    ffuncs = hb_font_funcs_create ();
    hb_font_funcs_set_glyph_h_advance_func (ffuncs, glyph_h_advance_func, NULL, NULL);
    hb_font_funcs_set_glyph_func (ffuncs, glyph_func, NULL, NULL);
    hb_font_funcs_set_glyph_h_kerning_func (ffuncs, glyph_h_kerning_func, NULL, NULL);
    hb_font_set_funcs (font, ffuncs, NULL, NULL);
    hb_font_funcs_destroy (ffuncs);
  
    buffer =  hb_buffer_create (0);
    hb_buffer_set_direction (buffer, HB_DIRECTION_LTR);
    hb_buffer_add_utf8 (buffer, TesT, 4, 0, 4);
  
    hb_shape (font, buffer, NULL, 0, NULL, NULL);
  
    len = hb_buffer_get_length (buffer);
    glyphs = hb_buffer_get_glyph_infos (buffer, NULL);
    positions = hb_buffer_get_glyph_positions (buffer, NULL);
  
    {
      const hb_codepoint_t output_glyphs[] = {1, 2, 3, 1};
      const hb_position_t output_x_advances[] = {9, 5, 5, 10};
      const hb_position_t output_x_offsets[] = {0, -1, 0, 0};
      unsigned int i;
      g_assert_cmpint (len, ==, 4);
      for (i = 0; i < len; i++) {
        g_assert_cmphex (glyphs[i].codepoint, ==, output_glyphs[i]);
        g_assert_cmphex (glyphs[i].cluster,   ==, i);
      }
      for (i = 0; i < len; i++) {
        g_assert_cmpint (output_x_advances[i], ==, positions[i].x_advance);
        g_assert_cmpint (output_x_offsets [i], ==, positions[i].x_offset);
        g_assert_cmpint (0, ==, positions[i].y_advance);
        g_assert_cmpint (0, ==, positions[i].y_offset);
      }
    }
  
    hb_buffer_destroy (buffer);
    hb_font_destroy (font);
  }
  
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
  
    hb_test_add (test_shape);
  
    return hb_test_run();
  }
  

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