/*
- * 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_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
-/* XXX */
-#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
-#define gproperty() var2.u32
-
ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
hb_direction_t direction;
hb_script_t script;
hb_language_t language;
+ ASSERT_POD ();
} hb_segment_properties_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_replace_glyphs_be16 (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be);
-
-HB_INTERNAL void
-_hb_buffer_replace_glyph (hb_buffer_t *buffer,
- hb_codepoint_t glyph_index);
-
-HB_INTERNAL void
-_hb_buffer_next_glyph (hb_buffer_t *buffer);
-
-
-HB_INTERNAL void
-_hb_buffer_reset_masks (hb_buffer_t *buffer,
- hb_mask_t mask);
-
-HB_INTERNAL void
-_hb_buffer_add_masks (hb_buffer_t *buffer,
- hb_mask_t mask);
-
-HB_INTERNAL void
-_hb_buffer_set_masks (hb_buffer_t *buffer,
- hb_mask_t value,
- hb_mask_t mask,
- unsigned int cluster_start,
- unsigned int cluster_end);
-
-
struct _hb_buffer_t {
- hb_reference_count_t ref_count;
+ hb_object_header_t header;
+ ASSERT_POD ();
/* Information about how the text in the buffer should be treated */
/* Buffer contents */
- unsigned int allocated; /* Length of allocated arrays */
-
- hb_bool_t have_output; /* Whether we have an output buffer going on */
- hb_bool_t have_positions; /* Whether we have positions */
- hb_bool_t in_error; /* Allocation failed */
+ bool in_error; /* Allocation failed */
+ bool have_output; /* Whether we have an output buffer going on */
+ bool have_positions; /* Whether we have positions */
- unsigned int i; /* Cursor into ->info and ->pos arrays */
+ 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 */
+ unsigned int out_len; /* Length of ->out array if have_output */
+ unsigned int allocated; /* Length of allocated arrays */
hb_glyph_info_t *info;
hb_glyph_info_t *out_info;
hb_glyph_position_t *pos;
- /* Other stuff */
+ inline hb_glyph_info_t &cur (unsigned int i = 0) { return info[idx + i]; }
+ inline hb_glyph_info_t cur (unsigned int i = 0) const { return info[idx + i]; }
+
+ inline hb_glyph_position_t &cur_pos (unsigned int i = 0) { return pos[idx + i]; }
+ inline hb_glyph_position_t cur_pos (unsigned int i = 0) const { return pos[idx + i]; }
+
+ inline hb_glyph_info_t &prev (void) { return out_info[out_len - 1]; }
+ inline hb_glyph_info_t prev (void) const { return info[out_len - 1]; }
unsigned int serial;
+ uint8_t allocated_var_bytes[8];
+ const char *allocated_var_owner[8];
/* Methods */
+
+ 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++; }
- 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 replace_glyphs_be16 (unsigned int num_in,
+
+ 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 guess_properties (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_glyphs (unsigned int num_in,
unsigned int num_out,
- const uint16_t *glyph_data_be)
- { _hb_buffer_replace_glyphs_be16 (this, num_in, num_out, glyph_data_be); }
- inline void replace_glyph (hb_codepoint_t glyph_index)
- { _hb_buffer_replace_glyph (this, glyph_index); }
+ const hb_codepoint_t *glyph_data);
+ 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 i = 0; i < len; i++)
- info[i].mask = mask;
+ for (unsigned int j = 0; j < len; j++)
+ info[j].mask = mask;
}
inline void add_masks (hb_mask_t mask)
{
- for (unsigned int i = 0; i < len; i++)
- info[i].mask |= mask;
+ for (unsigned int j = 0; j < len; j++)
+ info[j].mask |= mask;
}
- inline void set_masks (hb_mask_t value,
- hb_mask_t mask,
- unsigned int cluster_start,
- unsigned int cluster_end)
- { _hb_buffer_set_masks (this, value, mask, cluster_start, cluster_end); }
+ HB_INTERNAL void set_masks (hb_mask_t value,
+ hb_mask_t mask,
+ unsigned int cluster_start,
+ unsigned int cluster_end);
+ HB_INTERNAL void merge_clusters (unsigned int start,
+ unsigned int end);
+ HB_INTERNAL void merge_out_clusters (unsigned int start,
+ unsigned int 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);
+
+ HB_INTERNAL void *get_scratch_buffer (unsigned int *size);
};
-HB_END_DECLS
+#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)
+
+
#endif /* HB_BUFFER_PRIVATE_HH */
projects / framework / uifw / harfbuzz.git / blobdiff