/*
- * Copyright (C) 2007,2008 Red Hat, Inc.
+ * Copyright © 2007,2008,2009 Red Hat, Inc.
*
- * This is part of HarfBuzz, an OpenType Layout engine library.
+ * 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
* Red Hat Author(s): Behdad Esfahbod
*/
+#ifndef HB_OT_H_IN
+#error "Include <hb-ot.h> instead."
+#endif
+
#ifndef HB_OT_LAYOUT_H
#define HB_OT_LAYOUT_H
-#include "hb-common.h"
-
-HB_BEGIN_DECLS();
-
-/*
- * hb_ot_layout_t
- */
+#include "hb.h"
-typedef struct _hb_ot_layout_t hb_ot_layout_t;
+#include "hb-ot-tag.h"
-hb_ot_layout_t *
-hb_ot_layout_create_for_data (const char *font_data,
- int face_index);
+HB_BEGIN_DECLS
-void
-hb_ot_layout_destroy (hb_ot_layout_t *layout);
-/* TODO sanitizing API/constructor (make_wrieable_func_t) */
-/* TODO get_table_func_t constructor */
+#define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
+#define HB_OT_TAG_GSUB HB_TAG('G','S','U','B')
+#define HB_OT_TAG_GPOS HB_TAG('G','P','O','S')
/*
* 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_has_glyph_classes (hb_face_t *face);
-hb_ot_layout_glyph_class_t
-hb_ot_layout_get_glyph_class (hb_ot_layout_t *layout,
- hb_glyph_t glyph);
+/* Not that useful. Provides list of attach points for a glyph that a
+ * client may want to cache */
+unsigned int
+hb_ot_layout_get_attach_points (hb_face_t *face,
+ hb_codepoint_t glyph,
+ unsigned int start_offset,
+ unsigned int *point_count /* IN/OUT */,
+ unsigned int *point_array /* OUT */);
-void
-hb_ot_layout_set_glyph_class (hb_ot_layout_t *layout,
- hb_glyph_t glyph,
- hb_ot_layout_glyph_class_t klass);
+/* Ligature caret positions */
+unsigned int
+hb_ot_layout_get_ligature_carets (hb_font_t *font,
+ hb_direction_t direction,
+ hb_codepoint_t glyph,
+ unsigned int start_offset,
+ unsigned int *caret_count /* IN/OUT */,
+ hb_position_t *caret_array /* OUT */);
-void
-hb_ot_layout_build_glyph_classes (hb_ot_layout_t *layout,
- uint16_t num_total_glyphs,
- hb_glyph_t *glyphs,
- unsigned char *klasses,
- uint16_t count);
/*
- * GSUB/GPOS
+ * GSUB/GPOS feature query and enumeration interface
*/
-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;
-
#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_get_script_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type);
+hb_ot_layout_table_get_script_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int start_offset,
+ unsigned int *script_count /* IN/OUT */,
+ hb_tag_t *script_tags /* OUT */);
-hb_tag_t
-hb_ot_layout_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_face_t *face,
+ hb_tag_t table_tag,
+ hb_tag_t script_tag,
+ unsigned int *script_index);
+
+/* Like find_script, but takes zero-terminated array of scripts to test */
+hb_bool_t
+hb_ot_layout_table_choose_script (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_tag_t *script_tags,
+ unsigned int *script_index,
+ hb_tag_t *chosen_script);
+
+unsigned int
+hb_ot_layout_table_get_feature_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ hb_tag_t *feature_tags /* OUT */);
+
+unsigned int
+hb_ot_layout_script_get_language_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int start_offset,
+ unsigned int *language_count /* IN/OUT */,
+ hb_tag_t *language_tags /* OUT */);
+
+hb_bool_t
+hb_ot_layout_script_find_language (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ hb_tag_t language_tag,
+ unsigned int *language_index);
hb_bool_t
-hb_ot_layout_find_script (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- hb_tag_t script_tag,
- unsigned int *script_index);
+hb_ot_layout_language_get_required_feature_index (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int *feature_index);
unsigned int
-hb_ot_layout_get_language_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index);
+hb_ot_layout_language_get_feature_indexes (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ unsigned int *feature_indexes /* OUT */);
-hb_tag_t
-hb_ot_layout_get_language_tag (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_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ hb_tag_t *feature_tags /* OUT */);
hb_bool_t
-hb_ot_layout_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,
- unsigned int *required_features_index);
+hb_ot_layout_language_find_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ 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_indexes (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ unsigned int start_offset,
+ unsigned int *lookup_count /* IN/OUT */,
+ unsigned int *lookup_indexes /* OUT */);
/*
-#define PANGO_OT_ALL_GLYPHS ((guint) 0xFFFF)
+ * GSUB
+ */
+
+hb_bool_t
+hb_ot_layout_has_substitution (hb_face_t *face);
+
+/* Should be called before all the substitute_lookup's are done. */
+void
+hb_ot_layout_substitute_start (hb_buffer_t *buffer);
+
+hb_bool_t
+hb_ot_layout_substitute_lookup (hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask);
+
+/* Should be called after all the substitute_lookup's are done */
+void
+hb_ot_layout_substitute_finish (hb_buffer_t *buffer);
+
+
+void
+hb_ot_layout_substitute_closure_lookup (hb_face_t *face,
+ hb_set_t *glyphs,
+ unsigned int lookup_index);
+
+/*
+ * GPOS
+ */
+
+hb_bool_t
+hb_ot_layout_has_positioning (hb_face_t *face);
+
+/* Should be called before all the position_lookup's are done. Resets positions to zero. */
+void
+hb_ot_layout_position_start (hb_buffer_t *buffer);
+
+hb_bool_t
+hb_ot_layout_position_lookup (hb_font_t *font,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask);
+
+/* Should be called after all the position_lookup's are done */
+void
+hb_ot_layout_position_finish (hb_buffer_t *buffer);
-*/
-HB_END_DECLS();
+HB_END_DECLS
#endif /* HB_OT_LAYOUT_H */
projects / framework / uifw / harfbuzz.git / blobdiff