[hb-old] Remove unused header file
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Behdad Esfahbod
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6a9d43c317
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/*
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* Copyright (C) 2006 Red Hat, Inc.
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*
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* This is part of HarfBuzz, an OpenType Layout engine library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Owen Taylor
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*/
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#include <stdint.h>
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/* Base Types */
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typedef hb_uint16 HB_CodePoint; /* UTF-16 codepoint (not character ) */
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typedef char HB_Boolean;
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typedef hb_uint32 HB_Fixed; /* 26.6 */
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typedef hb_uint32 HB_Glyph;
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typedef hb_uint32 HB_Unichar;
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/* Metrics reported by the font backend for use of the shaper */
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typedef struct _HB_GlyphMetrics HB_GlyphMetrics;
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struct _HB_GlyphMetrics
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{
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HB_Fixed advance;
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/* Do we need ink/logical extents for the glyph here? */
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};
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/*
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* HB_Font: Abstract font interface.
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* First pass of this might just have FT_Face *getFace();
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*/
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typedef struct _HB_Font HB_Font;
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typedef struct _HB_FontClass HB_FontClass;
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struct HB_FontClass {
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HB_Glyph (*charToGlyph)(HB_Font *font, HB_Unichar chr);
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void (*getMetrics)(HB_Font *font, HB_Glyph glyph, HB_GlyphMetrics *metrics);
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HB_Boolean (*getSFontTable)(HB_Font *font, void **cookie, char **start, int *len);
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HB_Boolean (*freeSFontTable)(void **cookie);
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};
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struct _HB_Font {
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HB_FontClass *clazz;
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};
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/*
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* Language tags, of the form en-us; represented as interned, canonicalized
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* strings. hb_language_from_string("en_US"), hb_language_from_string("en-us")
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* both return the same (pointer-comparable) HB_Language).
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*/
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typedef struct HB_Language_ *HB_Language;
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HB_Language hb_language_from_string(const char *str);
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const char *hb_language_to_string(HB_Language language);
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/* Special treatment for the edges of runs.
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*/
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typedef enum {
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HB_RUN_EDGE_LINE_VISUAL_EDGE = 1 << 0,
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HB_RUN_EDGE_LINE_LOGICAL_EDGE = 1 << 1,
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HB_RUN_EDGE_LINE_ADD_HYPHEN = 1 << 2 /* ???? */
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} HB_RunEdge;
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/* Defines optional informaiton in HB_ShapeInput; this allows extension
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* of HB_ShapeInput while keeping binary compatibility
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*/
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typedef enum {
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HB_SHAPE_START_TYPE = 1 << 0,
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HB_SHAPE_END_TYPE = 1 << 1
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} HB_ShapeFlags;
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/* Attributes types are described by "interned strings"; this is a little
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* annoying if you want to write a switch statement, but keeps things
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* simple.
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*/
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typedef struct _HB_AttributeType *HB_AttributeType;
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HB_AttributeType hb_attribute_type_from_string(const char *str);
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const char *hb_attribute_type_to_string(HB_AttributeType attribute_type);
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struct HB_Attribute {
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HB_AttributeType type;
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int start;
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int end;
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};
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/**
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* You could handle this like HB_Language, but an enum seems a little nicer;
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* another approach would be to use OpenType script tags.
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*/
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typedef enum {
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HB_SCRIPT_LATIN
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/* ... */
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} HB_ShapeScript;
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/* This is just the subset of direction information needed by the shaper */
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typedef enum {
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HB_DIRECTION_LTR,
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HB_DIRECTION_RTL,
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HB_DIRECTION_TTB
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} HB_Direction;
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typedef struct _HB_ShapeInput HB_ShapeInput;
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struct _HB_ShapeInput {
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/* Defines what fields the caller has initialized - fields not in
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* the enum are mandatory.
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*/
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HB_ShapeFlags flags;
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HB_CodePoint *text;
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int length; /* total length of text to shape */
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int shape_offset; /* start of section to shape */
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int shape_length; /* number of code points to shape */
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HB_Direction direction;
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HB_ShapeScript script;
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HB_Language language;
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HB_AttributeType *attributes;
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int n_attributes;
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HB_RunEdge start_type;
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HB_RunEdge end_type;
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};
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struct HB_GlyphItem {
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HB_Glyph glyph;
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HB_Fixed x_offset;
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HB_Fixed y_offset;
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HB_Fixed advance;
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/* Add kashida information, etc, here */
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};
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typedef enum {
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HB_RESULT_SUCCESS,
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HB_RESULT_NO_MEMORY,
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HB_SHAPE_RESULT_FAILED
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} HB_Result;
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/*
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* Buffer for output
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*/
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typedef struct _HB_GlyphBuffer HB_GlyphBuffer;
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struct _HB_GlyphBuffer {
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int glyph_item_size;
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int total_glyphs;
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int *log_clusters; /* Uniscribe style */
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int cluster_space;
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int glyph_space;
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void *glyph_buffer;
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};
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/* Making this self-allocating simplifies writing shapers and
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* also keeps things easier for caller. item_size passed in
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* must be at least sizeof(HB_GlyphItem) but can be bigger,
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* to accomodate application structures that extend HB_GlyphItem.
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* The allocated items will be zero-initialized.
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*
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* (Hack: Harfbuzz could choose to use even a *bigger* item size
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* and stick internal information before the public item structure.
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* This hack could possibly be used to unify this with HB_Buffer)
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*/
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HB_GlyphBuffer *hb_glyph_buffer_new (size_t item_size);
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void hb_glyph_buffer_clear (HB_GlyphBuffer *buf);
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HB_Result hb_glyph_buffer_extend_glyphs (HB_GlyphBuffer *buf, int n_items);
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HB_Result hb_glyph_buffer_extend_clusters (HB_GlyphBuffer *buf, int n_clusters);
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void hb_glyph_buffer_free (HB_GlyphBuffer *buf);
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/* Accessor for a particular glyph */
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#define HB_GLYPH_BUFFER_ITEM(buffer, index)
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/*
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* Main shaping function
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*/
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HB_Result hb_shape(HB_ShapeInput *input, HB_GlyphBuffer *output);
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