/*
- * Copyright (C) 2007,2008,2009 Red Hat, Inc.
+ * Copyright © 2007,2008,2009 Red Hat, Inc.
+ * Copyright © 2010 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_LAYOUT_COMMON_PRIVATE_HH
#define NOT_COVERED ((unsigned int) 0x110000)
#define MAX_NESTING_LEVEL 8
+HB_BEGIN_DECLS
+HB_END_DECLS
+
/*
*
template <typename Type>
struct Record
{
+ inline int cmp (hb_tag_t a) const {
+ return tag.cmp (a);
+ }
+
inline bool sanitize (hb_sanitize_context_t *c, void *base) {
TRACE_SANITIZE ();
return c->check_struct (this)
};
template <typename Type>
-struct RecordArrayOf : ArrayOf<Record<Type> > {
+struct RecordArrayOf : SortedArrayOf<Record<Type> > {
inline const Tag& get_tag (unsigned int i) const
{
+ /* We cheat slightly and don't define separate Null objects
+ * for Record types. Instead, we return the correct Null(Tag)
+ * here. */
if (unlikely (i >= this->len)) return Null(Tag);
return (*this)[i].tag;
}
hb_tag_t *record_tags /* OUT */) const
{
if (record_count) {
- const Record<Type> *array = this->sub_array (start_offset, record_count);
+ const Record<Type> *arr = this->sub_array (start_offset, record_count);
unsigned int count = *record_count;
for (unsigned int i = 0; i < count; i++)
- record_tags[i] = array[i].tag;
+ record_tags[i] = arr[i].tag;
}
return this->len;
}
inline bool find_index (hb_tag_t tag, unsigned int *index) const
{
- Tag t;
- t.set (tag);
- /* TODO: bsearch (need to sort in sanitize) */
- const Record<Type> *a = this->array;
- unsigned int count = this->len;
- for (unsigned int i = 0; i < count; i++)
- {
- if (t == a[i].tag)
- {
+ int i = this->search (tag);
+ if (i != -1) {
if (index) *index = i;
return true;
- }
+ } else {
+ if (index) *index = Index::NOT_FOUND_INDEX;
+ return false;
}
- if (index) *index = Index::NOT_FOUND_INDEX;
- return false;
}
};
};
+struct RangeRecord
+{
+ inline int cmp (hb_codepoint_t g) const {
+ hb_codepoint_t a = start, b = end;
+ return g < a ? -1 : g <= b ? 0 : +1 ;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this);
+ }
+
+ GlyphID start; /* First GlyphID in the range */
+ GlyphID end; /* Last GlyphID in the range */
+ USHORT value; /* Value */
+ public:
+ DEFINE_SIZE_STATIC (6);
+};
+DEFINE_NULL_DATA (RangeRecord, "\000\001");
+
+
struct IndexArray : ArrayOf<Index>
{
inline unsigned int get_indexes (unsigned int start_offset,
unsigned int *_indexes /* OUT */) const
{
if (_count) {
- const USHORT *array = this->sub_array (start_offset, _count);
+ const USHORT *arr = this->sub_array (start_offset, _count);
unsigned int count = *_count;
for (unsigned int i = 0; i < count; i++)
- _indexes[i] = array[i];
+ _indexes[i] = arr[i];
}
return this->len;
}
&& lookupIndex.sanitize (c);
}
- /* LONGTERMTODO: implement get_feature_parameters() */
- /* LONGTERMTODO: implement FeatureSize and other special features? */
Offset featureParams; /* Offset to Feature Parameters table (if one
* has been defined for the feature), relative
* to the beginning of the Feature Table; = Null
inline unsigned int get_subtable_count (void) const { return subTable.len; }
inline unsigned int get_type (void) const { return lookupType; }
- inline unsigned int get_flag (void) const
+
+ /* lookup_props is a 32-bit integer where the lower 16-bit is LookupFlag and
+ * higher 16-bit is mark-filtering-set if the lookup uses one.
+ * Not to be confused with glyph_props which is very similar. */
+ inline uint32_t get_props (void) const
{
unsigned int flag = lookupFlag;
if (unlikely (flag & LookupFlag::UseMarkFilteringSet))
private:
inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
{
- if (unlikely (glyph_id > 0xFFFF))
- return NOT_COVERED;
- GlyphID gid;
- gid.set (glyph_id);
- /* TODO: bsearch (need to sort in sanitize) */
- unsigned int num_glyphs = glyphArray.len;
- for (unsigned int i = 0; i < num_glyphs; i++)
- if (gid == glyphArray[i])
+ int i = glyphArray.search (glyph_id);
+ if (i != -1)
return i;
return NOT_COVERED;
}
private:
USHORT coverageFormat; /* Format identifier--format = 1 */
- ArrayOf<GlyphID>
+ SortedArrayOf<GlyphID>
glyphArray; /* Array of GlyphIDs--in numerical order */
public:
DEFINE_SIZE_ARRAY (4, glyphArray);
};
-struct CoverageRangeRecord
-{
- friend struct CoverageFormat2;
-
- private:
- inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
- {
- if (glyph_id >= start && glyph_id <= end)
- return (unsigned int) startCoverageIndex + (glyph_id - start);
- return NOT_COVERED;
- }
-
- public:
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE ();
- return c->check_struct (this);
- }
-
- private:
- GlyphID start; /* First GlyphID in the range */
- GlyphID end; /* Last GlyphID in the range */
- USHORT startCoverageIndex; /* Coverage Index of first GlyphID in
- * range */
- public:
- DEFINE_SIZE_STATIC (6);
-};
-DEFINE_NULL_DATA (CoverageRangeRecord, "\000\001");
-
struct CoverageFormat2
{
friend struct Coverage;
private:
inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
{
- /* TODO: bsearch (need to sort in sanitize) */
- unsigned int count = rangeRecord.len;
- for (unsigned int i = 0; i < count; i++)
- {
- unsigned int coverage = rangeRecord[i].get_coverage (glyph_id);
- if (coverage != NOT_COVERED)
- return coverage;
+ int i = rangeRecord.search (glyph_id);
+ if (i != -1) {
+ const RangeRecord &range = rangeRecord[i];
+ return (unsigned int) range.value + (glyph_id - range.start);
}
return NOT_COVERED;
}
private:
USHORT coverageFormat; /* Format identifier--format = 2 */
- ArrayOf<CoverageRangeRecord>
+ SortedArrayOf<RangeRecord>
rangeRecord; /* Array of glyph ranges--ordered by
* Start GlyphID. rangeCount entries
* long */
friend struct ClassDef;
private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
{
if ((unsigned int) (glyph_id - startGlyph) < classValue.len)
return classValue[glyph_id - startGlyph];
DEFINE_SIZE_ARRAY (6, classValue);
};
-struct ClassRangeRecord
-{
- friend struct ClassDefFormat2;
-
- private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
- {
- if (glyph_id >= start && glyph_id <= end)
- return classValue;
- return 0;
- }
-
- public:
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE ();
- return c->check_struct (this);
- }
-
- private:
- GlyphID start; /* First GlyphID in the range */
- GlyphID end; /* Last GlyphID in the range */
- USHORT classValue; /* Applied to all glyphs in the range */
- public:
- DEFINE_SIZE_STATIC (6);
-};
-DEFINE_NULL_DATA (ClassRangeRecord, "\000\001");
-
struct ClassDefFormat2
{
friend struct ClassDef;
private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
{
- /* TODO: bsearch (need to sort in sanitize) */
- unsigned int count = rangeRecord.len;
- for (unsigned int i = 0; i < count; i++)
- {
- int classValue = rangeRecord[i].get_class (glyph_id);
- if (classValue > 0)
- return classValue;
- }
+ int i = rangeRecord.search (glyph_id);
+ if (i != -1)
+ return rangeRecord[i].value;
return 0;
}
}
USHORT classFormat; /* Format identifier--format = 2 */
- ArrayOf<ClassRangeRecord>
+ SortedArrayOf<RangeRecord>
rangeRecord; /* Array of glyph ranges--ordered by
* Start GlyphID */
public:
struct ClassDef
{
- inline hb_ot_layout_class_t operator () (hb_codepoint_t glyph_id) const { return get_class (glyph_id); }
+ inline unsigned int operator () (hb_codepoint_t glyph_id) const { return get_class (glyph_id); }
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
{
switch (u.format) {
case 1: return u.format1.get_class(glyph_id);
struct Device
{
- inline int operator () (unsigned int ppem_size) const { return get_delta (ppem_size); }
- inline int get_delta (unsigned int ppem_size) const
+ inline hb_position_t get_x_delta (hb_font_t *font) const
+ { return get_delta (font->x_ppem, font->x_scale); }
+
+ inline hb_position_t get_y_delta (hb_font_t *font) const
+ { return get_delta (font->y_ppem, font->y_scale); }
+
+ inline int get_delta (unsigned int ppem, int scale) const
+ {
+ if (!ppem) return 0;
+
+ int pixels = get_delta_pixels (ppem);
+
+ if (!pixels) return 0;
+
+ return pixels * (int64_t) scale / ppem;
+ }
+
+
+ inline int get_delta_pixels (unsigned int ppem_size) const
{
unsigned int f = deltaFormat;
if (unlikely (f < 1 || f > 3))
return delta;
}
- inline unsigned int get_size () const
+ inline unsigned int get_size (void) const
{
unsigned int f = deltaFormat;
if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::static_size;
};
+HB_BEGIN_DECLS
+HB_END_DECLS
+
#endif /* HB_OT_LAYOUT_COMMON_PRIVATE_HH */
projects / framework / uifw / harfbuzz.git / blobdiff