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Diffstat (limited to 'src/hb-ot-layout.h')
| -rw-r--r-- | src/hb-ot-layout.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/hb-ot-layout.h b/src/hb-ot-layout.h new file mode 100644 index 00000000..c29485c0 --- /dev/null +++ b/src/hb-ot-layout.h @@ -0,0 +1,229 @@ +/* + * Copyright (C) 2007,2008 Red Hat, Inc. + * + * This is part of HarfBuzz, an OpenType Layout engine 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. + * + * Red Hat Author(s): Behdad Esfahbod + */ + +#ifndef HB_OT_LAYOUT_H +#define HB_OT_LAYOUT_H + +#include "hb-common.h" + +HB_BEGIN_DECLS(); + +/* + * hb_ot_layout_t + */ + +typedef struct _hb_ot_layout_t hb_ot_layout_t; + +hb_ot_layout_t * +hb_ot_layout_create (void); + +hb_ot_layout_t * +hb_ot_layout_create_for_data (const char *font_data, + int face_index); + +void +hb_ot_layout_destroy (hb_ot_layout_t *layout); + +/* TODO sanitizing API/constructor (make_wrieable_func_t) */ +/* TODO get_table_func_t constructor */ + +/* + * GDEF + */ + +typedef enum { + HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0x0000, + HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH = 0x0002, + HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE = 0x0004, + HB_OT_LAYOUT_GLYPH_CLASS_MARK = 0x0008, + HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT = 0x0010 +} hb_ot_layout_glyph_class_t; + +hb_bool_t +hb_ot_layout_has_font_glyph_classes (hb_ot_layout_t *layout); + +hb_ot_layout_glyph_class_t +hb_ot_layout_get_glyph_class (hb_ot_layout_t *layout, + hb_codepoint_t glyph); + +void +hb_ot_layout_set_glyph_class (hb_ot_layout_t *layout, + hb_codepoint_t glyph, + hb_ot_layout_glyph_class_t klass); + +void +hb_ot_layout_build_glyph_classes (hb_ot_layout_t *layout, + uint16_t num_total_glyphs, + hb_codepoint_t *glyphs, + unsigned char *klasses, + uint16_t count); + +/* + * GSUB/GPOS + */ + +typedef enum { + HB_OT_LAYOUT_TABLE_TYPE_GSUB, + HB_OT_LAYOUT_TABLE_TYPE_GPOS, + HB_OT_LAYOUT_TABLE_TYPE_NONE +} hb_ot_layout_table_type_t; + +typedef uint16_t hb_ot_layout_feature_mask_t; + +#define HB_OT_LAYOUT_MAX_NESTING_LEVEL 100 + +#define HB_OT_LAYOUT_NO_SCRIPT_INDEX ((unsigned int) 0xFFFF) +#define HB_OT_LAYOUT_NO_FEATURE_INDEX ((unsigned int) 0xFFFF) +#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX ((unsigned int) 0xFFFF) +#define HB_OT_LAYOUT_TAG_DEFAULT_SCRIPT HB_TAG ('D', 'F', 'L', 'T') +#define HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE HB_TAG ('d', 'f', 'l', 't') + +unsigned int +hb_ot_layout_table_get_script_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type); + +hb_tag_t +hb_ot_layout_table_get_script_tag (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index); + +hb_bool_t +hb_ot_layout_table_find_script (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + hb_tag_t script_tag, + unsigned int *script_index); + +unsigned int +hb_ot_layout_table_get_feature_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type); + +hb_tag_t +hb_ot_layout_table_get_feature_tag (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int feature_index); + +hb_bool_t +hb_ot_layout_table_find_script (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + hb_tag_t feature_tag, + unsigned int *feature_index); + +unsigned int +hb_ot_layout_table_get_lookup_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type); + +unsigned int +hb_ot_layout_script_get_language_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index); + +hb_tag_t +hb_ot_layout_script_get_language_tag (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index); + +hb_bool_t +hb_ot_layout_script_find_language (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + hb_tag_t language_tag, + unsigned int *language_index); + +hb_bool_t +hb_ot_layout_language_get_required_feature_index (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index, + unsigned int *feature_index); + +unsigned int +hb_ot_layout_language_get_feature_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index); + +unsigned int +hb_ot_layout_language_get_feature_index (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index, + unsigned int num_feature); + +hb_tag_t +hb_ot_layout_language_get_feature_tag (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index, + unsigned int num_feature); + +hb_bool_t +hb_ot_layout_language_find_feature (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int script_index, + unsigned int language_index, + hb_tag_t feature_tag, + unsigned int *feature_index); + +unsigned int +hb_ot_layout_feature_get_lookup_count (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int feature_index); + +unsigned int +hb_ot_layout_feature_get_lookup_index (hb_ot_layout_t *layout, + hb_ot_layout_table_type_t table_type, + unsigned int feature_index, + unsigned int num_lookup); + +/* + * GSUB + */ + +hb_bool_t +hb_ot_layout_substitute_lookup (hb_ot_layout_t *layout, + hb_buffer_t *buffer, + unsigned int lookup_index, + hb_ot_layout_feature_mask_t mask); + + + + + + + + + + + +/* +#define PANGO_OT_ALL_GLYPHS ((guint) 0xFFFF) + +*/ + +HB_END_DECLS(); + +#endif /* HB_OT_LAYOUT_H */ |