/*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 2011 Google, Inc.
*
- * This is part of HarfBuzz, a text shaping 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_BUFFER_PRIVATE_H
-#define HB_BUFFER_PRIVATE_H
+#ifndef HB_BUFFER_PRIVATE_HH
+#define HB_BUFFER_PRIVATE_HH
-#include "hb-private.h"
+#include "hb-private.hh"
#include "hb-buffer.h"
-#include "hb-unicode-private.h"
+#include "hb-object-private.hh"
+#include "hb-unicode-private.hh"
HB_BEGIN_DECLS
-#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
-
-
-typedef struct _hb_internal_glyph_info_t {
- hb_codepoint_t codepoint;
- hb_mask_t mask;
- uint32_t cluster;
- uint16_t component;
- uint16_t lig_id;
- uint32_t gproperty;
-} hb_internal_glyph_info_t;
-
-typedef struct _hb_internal_glyph_position_t {
- hb_position_t x_advance;
- hb_position_t y_advance;
- hb_position_t x_offset;
- hb_position_t y_offset;
- uint32_t back : 16; /* number of glyphs to go back
- for drawing current glyph */
- int32_t cursive_chain : 16; /* character to which this connects,
- may be positive or negative */
-} hb_internal_glyph_position_t;
-
-ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_internal_glyph_info_t));
-ASSERT_STATIC (sizeof (hb_glyph_position_t) == sizeof (hb_internal_glyph_position_t));
-ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
-
-
-HB_INTERNAL void
-_hb_buffer_swap (hb_buffer_t *buffer);
-
-HB_INTERNAL void
-_hb_buffer_clear_output (hb_buffer_t *buffer);
-
-HB_INTERNAL void
-_hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data,
- unsigned short component,
- unsigned short ligID);
-
-HB_INTERNAL void
-_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be,
- unsigned short component,
- unsigned short ligID);
-
-HB_INTERNAL void
-_hb_buffer_add_output_glyph (hb_buffer_t *buffer,
- hb_codepoint_t glyph_index,
- unsigned short component,
- unsigned short ligID);
-HB_INTERNAL void
-_hb_buffer_next_glyph (hb_buffer_t *buffer);
+ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
+ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
+typedef struct _hb_segment_properties_t {
+ hb_direction_t direction;
+ hb_script_t script;
+ hb_language_t language;
+} hb_segment_properties_t;
struct _hb_buffer_t {
- hb_reference_count_t ref_count;
+ hb_object_header_t header;
/* Information about how the text in the buffer should be treated */
- hb_unicode_funcs_t *unicode;
- hb_direction_t direction;
- hb_script_t script;
- hb_language_t language;
- /* Buffer contents */
+ hb_unicode_funcs_t *unicode; /* Unicode functions */
+ hb_segment_properties_t props; /* Script, language, direction */
- unsigned int allocated;
+ /* Buffer contents */
- hb_bool_t have_output; /* whether we have an output buffer going on */
- hb_bool_t have_positions; /* whether we have positions */
- unsigned int in_length;
- unsigned int out_length;
- unsigned int in_pos;
- unsigned int out_pos; /* out_length and out_pos are actually always the same */
+ bool in_error; /* Allocation failed */
+ bool have_output; /* Whether we have an output buffer going on */
+ bool have_positions; /* Whether we have positions */
- hb_internal_glyph_info_t *in_string;
- hb_internal_glyph_info_t *out_string;
- hb_internal_glyph_position_t *positions;
+ unsigned int idx; /* Cursor into ->info and ->pos arrays */
+ unsigned int len; /* Length of ->info and ->pos arrays */
+ unsigned int out_len; /* Length of ->out array if have_output */
- /* Other stuff */
+ unsigned int allocated; /* Length of allocated arrays */
+ hb_glyph_info_t *info;
+ hb_glyph_info_t *out_info;
+ hb_glyph_position_t *pos;
- unsigned int max_lig_id;
+ unsigned int serial;
+ uint8_t allocated_var_bytes[8];
+ const char *allocated_var_owner[8];
/* Methods */
- inline unsigned int allocate_lig_id (void) { return max_lig_id++; }
- inline void swap (void) { _hb_buffer_swap (this); }
- inline void clear_output (void) { _hb_buffer_clear_output (this); }
- inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
- inline void add_output_glyphs (unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data,
- unsigned short component,
- unsigned short ligID)
- { _hb_buffer_add_output_glyphs (this, num_in, num_out, glyph_data, component, ligID); }
- inline void add_output_glyphs_be16 (unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be,
- unsigned short component,
- unsigned short ligID)
- { _hb_buffer_add_output_glyphs_be16 (this, num_in, num_out, glyph_data_be, component, ligID); }
- inline void add_output_glyph (hb_codepoint_t glyph_index,
- unsigned short component = 0xFFFF,
- unsigned short ligID = 0xFFFF)
- { _hb_buffer_add_output_glyph (this, glyph_index, component, ligID); }
- inline void replace_glyph (hb_codepoint_t glyph_index) { add_output_glyph (glyph_index); }
+
+ HB_INTERNAL void reset (void);
+
+ inline unsigned int backtrack_len (void) const
+ { return have_output? out_len : idx; }
+ inline unsigned int next_serial (void) { return serial++; }
+
+ HB_INTERNAL void allocate_var (unsigned int byte_i, unsigned int count, const char *owner);
+ HB_INTERNAL void deallocate_var (unsigned int byte_i, unsigned int count, const char *owner);
+ HB_INTERNAL void deallocate_var_all (void);
+
+ HB_INTERNAL void add (hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster);
+
+ HB_INTERNAL void reverse_range (unsigned int start, unsigned int end);
+ HB_INTERNAL void reverse (void);
+ HB_INTERNAL void reverse_clusters (void);
+
+ HB_INTERNAL void swap_buffers (void);
+ HB_INTERNAL void clear_output (void);
+ HB_INTERNAL void clear_positions (void);
+ HB_INTERNAL void replace_glyphs_be16 (unsigned int num_in,
+ unsigned int num_out,
+ const uint16_t *glyph_data_be);
+ HB_INTERNAL void replace_glyph (hb_codepoint_t glyph_index);
+ /* Makes a copy of the glyph at idx to output and replace glyph_index */
+ HB_INTERNAL void output_glyph (hb_codepoint_t glyph_index);
+ /* Copies glyph at idx to output but doesn't advance idx */
+ HB_INTERNAL void copy_glyph (void);
+ /* Copies glyph at idx to output and advance idx.
+ * If there's no output, just advance idx. */
+ HB_INTERNAL void next_glyph (void);
+ /* Advance idx without copying to output. */
+ inline void skip_glyph (void) { idx++; }
+
+ inline void reset_masks (hb_mask_t mask)
+ {
+ for (unsigned int j = 0; j < len; j++)
+ info[j].mask = mask;
+ }
+ inline void add_masks (hb_mask_t mask)
+ {
+ for (unsigned int j = 0; j < len; j++)
+ info[j].mask |= mask;
+ }
+ HB_INTERNAL void set_masks (hb_mask_t value,
+ hb_mask_t mask,
+ unsigned int cluster_start,
+ unsigned int cluster_end);
+
+ /* Internal methods */
+ HB_INTERNAL bool enlarge (unsigned int size);
+
+ inline bool ensure (unsigned int size)
+ { return likely (size <= allocated) ? TRUE : enlarge (size); }
+
+ HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
};
+#define HB_BUFFER_XALLOCATE_VAR(b, func, var, owner) \
+ b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \
+ sizeof (b->info[0].var), owner)
+#define HB_BUFFER_ALLOCATE_VAR(b, var) \
+ HB_BUFFER_XALLOCATE_VAR (b, allocate_var, var (), #var)
+#define HB_BUFFER_DEALLOCATE_VAR(b, var) \
+ HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var (), #var)
+
+
HB_END_DECLS
-#endif /* HB_BUFFER_PRIVATE_H */
+#endif /* HB_BUFFER_PRIVATE_HH */
projects / framework / uifw / harfbuzz.git / blobdiff