/*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2004,2007,2009 Red Hat, Inc.
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009 Red Hat, Inc.
+ * Copyright © 2011 Google, 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
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
*/
+#ifndef HB_H_IN
+#error "Include <hb.h> instead."
+#endif
+
#ifndef HB_BUFFER_H
#define HB_BUFFER_H
#include "hb-common.h"
+#include "hb-unicode.h"
HB_BEGIN_DECLS
-typedef struct _hb_buffer_t hb_buffer_t;
-typedef enum _hb_direction_t {
- HB_DIRECTION_LTR,
- HB_DIRECTION_RTL,
- HB_DIRECTION_TTB,
- HB_DIRECTION_BTT
-} hb_direction_t;
+typedef struct _hb_buffer_t hb_buffer_t;
typedef struct _hb_glyph_info_t {
hb_codepoint_t codepoint;
hb_mask_t mask;
uint32_t cluster;
- uint16_t component;
- uint16_t lig_id;
- uint32_t internal;
+
+ /*< private >*/
+ hb_var_int_t var1;
+ hb_var_int_t var2;
} hb_glyph_info_t;
typedef struct _hb_glyph_position_t {
- hb_position_t x_pos;
- hb_position_t y_pos;
hb_position_t x_advance;
hb_position_t y_advance;
- /* XXX these should all be replaced by "uint32_t internal" */
- hb_bool_t new_advance :1; /* if set, the advance width values are
- absolute, i.e., they won't be
- added to the original glyph's value
- but rather replace them */
- unsigned short back : 15; /* number of glyphs to go back
- for drawing current glyph */
- short cursive_chain : 16; /* character to which this connects,
- may be positive or negative; used
- only internally */
+ hb_position_t x_offset;
+ hb_position_t y_offset;
+
+ /*< private >*/
+ hb_var_int_t var;
} hb_glyph_position_t;
hb_buffer_t *
-hb_buffer_create (unsigned int pre_alloc_size);
+hb_buffer_create (void);
hb_buffer_t *
-hb_buffer_reference (hb_buffer_t *buffer);
+hb_buffer_get_empty (void);
-unsigned int
-hb_buffer_get_reference_count (hb_buffer_t *buffer);
+hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer);
void
hb_buffer_destroy (hb_buffer_t *buffer);
+hb_bool_t
+hb_buffer_set_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key,
+ void * data,
+ hb_destroy_func_t destroy,
+ hb_bool_t replace);
+
+void *
+hb_buffer_get_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key);
+
+
+void
+hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
+ hb_unicode_funcs_t *unicode_funcs);
+
+hb_unicode_funcs_t *
+hb_buffer_get_unicode_funcs (hb_buffer_t *buffer);
void
hb_buffer_set_direction (hb_buffer_t *buffer,
hb_direction_t
hb_buffer_get_direction (hb_buffer_t *buffer);
-
void
-hb_buffer_clear (hb_buffer_t *buffer);
+hb_buffer_set_script (hb_buffer_t *buffer,
+ hb_script_t script);
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer);
void
-hb_buffer_clear_positions (hb_buffer_t *buffer);
+hb_buffer_set_language (hb_buffer_t *buffer,
+ hb_language_t language);
+
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer);
+
+/* Resets the buffer. Afterwards it's as if it was just created,
+ * except that it has a larger buffer allocated perhaps... */
void
-hb_buffer_ensure (hb_buffer_t *buffer,
- unsigned int size);
+hb_buffer_reset (hb_buffer_t *buffer);
+
+/* Returns false if allocation failed */
+hb_bool_t
+hb_buffer_pre_allocate (hb_buffer_t *buffer,
+ unsigned int size);
+
+
+/* Returns false if allocation has failed before */
+hb_bool_t
+hb_buffer_allocation_successful (hb_buffer_t *buffer);
void
hb_buffer_reverse (hb_buffer_t *buffer);
+void
+hb_buffer_reverse_clusters (hb_buffer_t *buffer);
+
+void
+hb_buffer_guess_properties (hb_buffer_t *buffer);
+
/* Filling the buffer in */
void
-hb_buffer_add_glyph (hb_buffer_t *buffer,
- hb_codepoint_t codepoint,
- hb_mask_t mask,
- unsigned int cluster);
+hb_buffer_add (hb_buffer_t *buffer,
+ hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster);
void
hb_buffer_add_utf8 (hb_buffer_t *buffer,
const char *text,
- unsigned int text_length,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length);
+ int item_length);
void
hb_buffer_add_utf16 (hb_buffer_t *buffer,
const uint16_t *text,
- unsigned int text_length,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length);
+ int item_length);
void
hb_buffer_add_utf32 (hb_buffer_t *buffer,
const uint32_t *text,
- unsigned int text_length,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length);
+ int item_length);
-/* Getting glyphs out of the buffer */
+/* Clears any new items added at the end */
+hb_bool_t
+hb_buffer_set_length (hb_buffer_t *buffer,
+ unsigned int length);
/* Return value valid as long as buffer not modified */
unsigned int
-hb_buffer_get_len (hb_buffer_t *buffer);
+hb_buffer_get_length (hb_buffer_t *buffer);
+
+/* Getting glyphs out of the buffer */
/* Return value valid as long as buffer not modified */
hb_glyph_info_t *
-hb_buffer_get_glyph_infos (hb_buffer_t *buffer);
+hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
+ unsigned int *length);
/* Return value valid as long as buffer not modified */
hb_glyph_position_t *
-hb_buffer_get_glyph_positions (hb_buffer_t *buffer);
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
+ unsigned int *length);
HB_END_DECLS
projects / framework / uifw / harfbuzz.git / blobdiff