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/gfx/harfbuzz/src/hb-ot-layout-private.hh

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C++ Header | 114 lines | 53 code | 27 blank | 34 comment | 0 complexity | f1cce88292678d4ca62e6bf30b745e16 MD5 | raw file
Possible License(s): AGPL-1.0, MIT, BSD-3-Clause, Apache-2.0, LGPL-2.1, 0BSD, LGPL-3.0, MPL-2.0-no-copyleft-exception, GPL-2.0, JSON 
    

  1. /*
    2. 

  2.  * Copyright (C) 2007,2008,2009  Red Hat, Inc.
    3. 

  3.  *
    4. 

  4.  *  This is part of HarfBuzz, a text shaping library.
    5. 

  5.  *
    6. 

  6.  * Permission is hereby granted, without written agreement and without
    7. 

  7.  * license or royalty fees, to use, copy, modify, and distribute this
    8. 

  8.  * software and its documentation for any purpose, provided that the
    9. 

  9.  * above copyright notice and the following two paragraphs appear in
    10. 

  10.  * all copies of this software.
    11. 

  11.  *
    12. 

  12.  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
    13. 

  13.  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
    14. 

  14.  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
    15. 

  15.  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
    16. 

  16.  * DAMAGE.
    17. 

  17.  *
    18. 

  18.  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
    19. 

  19.  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    20. 

  20.  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
    21. 

  21.  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
    22. 

  22.  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
    23. 

  23.  *
    24. 

  24.  * Red Hat Author(s): Behdad Esfahbod
    25. 

  25.  */
    26. 

  26. 

  27. #ifndef HB_OT_LAYOUT_PRIVATE_HH
    28. 

  28. #define HB_OT_LAYOUT_PRIVATE_HH
    29. 

  29. 

  30. #include "hb-private.h"
    31. 

  31. 

  32. #include "hb-ot-layout.h"
    33. 

  33. #include "hb-ot-head-private.hh"
    34. 

  34. 

  35. #include "hb-font-private.h"
    36. 

  36. #include "hb-buffer-private.hh"
    37. 

  37. 

  38. HB_BEGIN_DECLS
    39. 

  39. 

  40. 

  41. /* buffer var allocations */
    42. 

  42. #define props_cache() var1.u16[1] /* glyph_props cache */
    43. 

  43. 

  44. 

  45. /* XXX cleanup */
    46. 

  46. typedef enum {
    47. 

  47.   HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED	= 0x0001,
    48. 

  48.   HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH	= 0x0002,
    49. 

  49.   HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE	= 0x0004,
    50. 

  50.   HB_OT_LAYOUT_GLYPH_CLASS_MARK		= 0x0008,
    51. 

  51.   HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT	= 0x0010
    52. 

  52. } hb_ot_layout_glyph_class_t;
    53. 

  53. 

  54. 

  55. /*
    56. 

  56.  * hb_ot_layout_t
    57. 

  57.  */
    58. 

  58. 

  59. struct hb_ot_layout_t
    60. 

  60. {
    61. 

  61.   hb_blob_t *gdef_blob;
    62. 

  62.   hb_blob_t *gsub_blob;
    63. 

  63.   hb_blob_t *gpos_blob;
    64. 

  64. 

  65.   const struct GDEF *gdef;
    66. 

  66.   const struct GSUB *gsub;
    67. 

  67.   const struct GPOS *gpos;
    68. 

  68. };
    69. 

  69. 

  70. struct hb_ot_layout_context_t
    71. 

  71. {
    72. 

  72.   hb_face_t *face;
    73. 

  73.   hb_font_t *font;
    74. 

  74. 

  75.   /* Convert from font-space to user-space */
    76. 

  76.   inline hb_position_t scale_x (int16_t v) { return scale (v, this->font->x_scale); }
    77. 

  77.   inline hb_position_t scale_y (int16_t v) { return scale (v, this->font->y_scale); }
    78. 

  78. 

  79.   private:
    80. 

  80.   inline hb_position_t scale (int16_t v, unsigned int scale) { return v * (int64_t) scale / this->face->head_table->get_upem (); }
    81. 

  81. };
    82. 

  82. 

  83. 

  84. HB_INTERNAL hb_ot_layout_t *
    85. 

  85. _hb_ot_layout_new (hb_face_t *face);
    86. 

  86. 

  87. HB_INTERNAL void
    88. 

  88. _hb_ot_layout_free (hb_ot_layout_t *layout);
    89. 

  89. 

  90. 

  91. /*
    92. 

  92.  * GDEF
    93. 

  93.  */
    94. 

  94. 

  95. HB_INTERNAL unsigned int
    96. 

  96. _hb_ot_layout_get_glyph_property (hb_face_t       *face,
    97. 

  97. 				  hb_glyph_info_t *info);
    98. 

  98. 

  99. HB_INTERNAL hb_bool_t
    100. 

  100. _hb_ot_layout_check_glyph_property (hb_face_t    *face,
    101. 

  101. 				    hb_glyph_info_t *ginfo,
    102. 

  102. 				    unsigned int  lookup_props,
    103. 

  103. 				    unsigned int *property_out);
    104. 

  104. 

  105. HB_INTERNAL hb_bool_t
    106. 

  106. _hb_ot_layout_skip_mark (hb_face_t    *face,
    107. 

  107. 			 hb_glyph_info_t *ginfo,
    108. 

  108. 			 unsigned int  lookup_props,
    109. 

  109. 			 unsigned int *property_out);
    110. 

  110. 

  111. 

  112. HB_END_DECLS
    113. 

  113. 

  114. #endif /* HB_OT_LAYOUT_PRIVATE_HH */
    115. 

  115.