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[GDEF] Finish public API

This commit is contained in:
Behdad Esfahbod 2008-01-24 19:13:50 -05:00
parent aff831ed67
commit 590d55cbb9
6 changed files with 176 additions and 63 deletions
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11
src/hb-common.h
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@ -37,4 +37,15 @@
# define HB_END_DECLS() extern int hb_dummy_prototype (int)
# endif /* !__cplusplus */
typedef int hb_bool_t;
typedef uint32_t hb_tag_t;
#define HB_TAG(a,b,c,d) ((hb_tag_t)(((uint8_t)a<<24)|((uint8_t)b<<16)|((uint8_t)c<<8)|(uint8_t)d))
#define HB_TAG_STR(s) (HB_TAG(((const char *) s)[0], \
((const char *) s)[1], \
((const char *) s)[2], \
((const char *) s)[3]))
typedef uint16_t hb_glyph_t;
#endif /* HB_COMMON_H */

28
src/hb-ot-layout-gdef-private.h
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@ -33,7 +33,7 @@
#define DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP(Type, name) \
inline const Type& name (hb_ot_layout_glyph_t glyph_id) { \
inline const Type& name (hb_glyph_t glyph_id) { \
const Coverage &c = get_coverage (); \
hb_ot_layout_coverage_t c_index = c.get_coverage (glyph_id); \
return (*this)[c_index]; \
@ -72,13 +72,13 @@ struct AttachList {
friend struct GDEF;
private:
/* const AttachPoint& get_attach_points (hb_ot_layout_glyph_t glyph_id); */
/* const AttachPoint& get_attach_points (hb_glyph_t glyph_id); */
DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP (AttachPoint, get_attach_points);
private:
/* AttachPoint tables, in Coverage Index order */
DEFINE_OFFSET_ARRAY_TYPE (AttachPoint, attachPoint, glyphCount);
DEFINE_ACCESSOR (Coverage, get_coverage, coverage);
DEFINE_GET_ACCESSOR (Coverage, coverage, coverage);
private:
Offset coverage; /* Offset to Coverage table -- from
@ -205,13 +205,13 @@ struct LigCaretList {
friend struct GDEF;
private:
/* const LigGlyph& get_lig_glyph (hb_ot_layout_glyph_t glyph_id); */
/* const LigGlyph& get_lig_glyph (hb_glyph_t glyph_id); */
DEFINE_INDIRECT_GLYPH_ARRAY_LOOKUP (LigGlyph, get_lig_glyph);
private:
/* AttachPoint tables, in Coverage Index order */
DEFINE_OFFSET_ARRAY_TYPE (LigGlyph, ligGlyph, ligGlyphCount);
DEFINE_ACCESSOR (Coverage, get_coverage, coverage);
DEFINE_GET_ACCESSOR (Coverage, coverage, coverage);
private:
Offset coverage; /* Offset to Coverage table--from
@ -240,19 +240,17 @@ struct GDEF {
STATIC_DEFINE_GET_FOR_DATA (GDEF);
/* XXX check version here? */
DEFINE_ACCESSOR (ClassDef, get_glyph_class_def, glyphClassDef);
DEFINE_ACCESSOR (AttachList, get_attach_list, attachList);
DEFINE_ACCESSOR (LigCaretList, get_lig_caret_list, ligCaretList);
DEFINE_ACCESSOR (ClassDef, get_mark_attach_class_def, markAttachClassDef);
DEFINE_GET_HAS_ACCESSOR (ClassDef, glyph_classes, glyphClassDef);
DEFINE_GET_HAS_ACCESSOR (AttachList, attach_list, attachList);
DEFINE_GET_HAS_ACCESSOR (LigCaretList, lig_caret_list, ligCaretList);
DEFINE_GET_HAS_ACCESSOR (ClassDef, mark_attachment_types, markAttachClassDef);
/* Returns 0 if not found. */
inline hb_ot_layout_class_t get_glyph_class (hb_ot_layout_glyph_t glyph_id) const {
return get_glyph_class_def ().get_class (glyph_id);
inline hb_ot_layout_class_t get_glyph_class (hb_glyph_t glyph_id) const {
return get_glyph_classes ().get_class (glyph_id);
}
/* Returns 0 if not found. */
inline hb_ot_layout_class_t get_mark_attachment_type (hb_ot_layout_glyph_t glyph_id) const {
return get_mark_attach_class_def ().get_class (glyph_id);
inline hb_ot_layout_class_t get_mark_attachment_type (hb_glyph_t glyph_id) const {
return get_mark_attachment_types ().get_class (glyph_id);
}
/* TODO get_attach and get_lig_caret */

25
src/hb-ot-layout-open-private.h
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@ -186,11 +186,16 @@
}
#define DEFINE_ACCESSOR(Type, name, Name) \
inline const Type& name (void) const { \
#define DEFINE_GET_ACCESSOR(Type, name, Name) \
inline const Type& get_##name (void) const { \
if (HB_UNLIKELY (!Name)) return Null##Type; \
return *(const Type*)((const char*)this + Name); \
}
#define DEFINE_GET_HAS_ACCESSOR(Type, name, Name) \
DEFINE_GET_ACCESSOR (Type, name, Name); \
inline bool has_##name (void) const { \
return Name != 0; \
}
@ -633,7 +638,7 @@ struct CoverageFormat1 {
/* GlyphIDs, in sorted numerical order */
DEFINE_ARRAY_TYPE (GlyphID, glyphArray, glyphCount);
inline hb_ot_layout_coverage_t get_coverage (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_coverage_t get_coverage (hb_glyph_t glyph_id) const {
GlyphID gid;
gid = glyph_id;
// TODO: bsearch
@ -655,7 +660,7 @@ struct CoverageRangeRecord {
friend struct CoverageFormat2;
private:
inline hb_ot_layout_coverage_t get_coverage (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_coverage_t get_coverage (hb_glyph_t glyph_id) const {
if (glyph_id >= start && glyph_id <= end)
return startCoverageIndex + (glyph_id - start);
return -1;
@ -677,7 +682,7 @@ struct CoverageFormat2 {
/* CoverageRangeRecords, in sorted numerical start order */
DEFINE_ARRAY_TYPE (CoverageRangeRecord, rangeRecord, rangeCount);
inline hb_ot_layout_coverage_t get_coverage (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_coverage_t get_coverage (hb_glyph_t glyph_id) const {
// TODO: bsearch
for (unsigned int i = 0; i < rangeCount; i++) {
int coverage = rangeRecord[i].get_coverage (glyph_id);
@ -707,7 +712,7 @@ struct Coverage {
}
}
hb_ot_layout_coverage_t get_coverage (hb_ot_layout_glyph_t glyph_id) const {
hb_ot_layout_coverage_t get_coverage (hb_glyph_t glyph_id) const {
switch (u.coverageFormat) {
case 1: return u.format1.get_coverage(glyph_id);
case 2: return u.format2.get_coverage(glyph_id);
@ -736,7 +741,7 @@ struct ClassDefFormat1 {
/* GlyphIDs, in sorted numerical order */
DEFINE_ARRAY_TYPE (USHORT, classValueArray, glyphCount);
inline hb_ot_layout_class_t get_class (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_class_t get_class (hb_glyph_t glyph_id) const {
if (glyph_id >= startGlyph && glyph_id - startGlyph < glyphCount)
return classValueArray[glyph_id - startGlyph];
return 0;
@ -755,7 +760,7 @@ struct ClassRangeRecord {
friend struct ClassDefFormat2;
private:
inline hb_ot_layout_class_t get_class (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_class_t get_class (hb_glyph_t glyph_id) const {
if (glyph_id >= start && glyph_id <= end)
return classValue;
return 0;
@ -776,7 +781,7 @@ struct ClassDefFormat2 {
/* ClassRangeRecords, in sorted numerical start order */
DEFINE_ARRAY_TYPE (ClassRangeRecord, rangeRecord, rangeCount);
inline hb_ot_layout_class_t get_class (hb_ot_layout_glyph_t glyph_id) const {
inline hb_ot_layout_class_t get_class (hb_glyph_t glyph_id) const {
// TODO: bsearch
for (int i = 0; i < rangeCount; i++) {
int classValue = rangeRecord[i].get_class (glyph_id);
@ -805,7 +810,7 @@ struct ClassDef {
}
}
inline hb_ot_layout_class_t get_class (hb_ot_layout_glyph_t glyph_id) const {
hb_ot_layout_class_t get_class (hb_glyph_t glyph_id) const {
switch (u.classFormat) {
case 1: return u.format1.get_class(glyph_id);
case 2: return u.format2.get_class(glyph_id);

21
src/hb-ot-layout-private.h
View File

@ -38,28 +38,15 @@ typedef uint16_t hb_ot_layout_class_t;
typedef uint16_t hb_ot_layout_glyph_properties_t;
typedef int hb_ot_layout_coverage_t; /* -1 is not covered, >= 0 otherwise */
struct GDEF;
struct GSUB;
struct GPOS;
struct _HB_OT_Layout {
const GDEF *gdef;
const GSUB *gsub;
const GPOS *gpos;
struct {
uint8_t *klasses;
unsigned int len;
} new_gdef;
};
HB_BEGIN_DECLS();
static hb_ot_layout_glyph_properties_t
_hb_ot_layout_get_glyph_properties (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph);
hb_glyph_t glyph);
static hb_bool_t
_hb_ot_layout_has_new_glyph_classes (HB_OT_Layout *layout);
HB_END_DECLS();

119
src/hb-ot-layout.cc
View File

@ -37,6 +37,18 @@
#include <string.h>
struct _HB_OT_Layout {
const GDEF *gdef;
const GSUB *gsub;
//const GPOS *gpos;
struct {
unsigned char *klasses;
unsigned int len;
} new_gdef;
};
HB_OT_Layout *
hb_ot_layout_create (const char *font_data,
int face_index)
@ -59,9 +71,25 @@ hb_ot_layout_destroy (HB_OT_Layout *layout)
free (layout);
}
/*
* GDEF
*/
hb_bool_t
hb_ot_layout_has_font_glyph_classes (HB_OT_Layout *layout)
{
return layout->gdef->has_glyph_classes ();
}
static hb_bool_t
_hb_ot_layout_has_new_glyph_classes (HB_OT_Layout *layout)
{
return layout->new_gdef.len > 0;
}
static hb_ot_layout_glyph_properties_t
_hb_ot_layout_get_glyph_properties (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph)
hb_glyph_t glyph)
{
hb_ot_layout_class_t klass;
@ -86,9 +114,68 @@ _hb_ot_layout_get_glyph_properties (HB_OT_Layout *layout,
}
}
#if 0
static bool
_hb_ot_layout_check_glyph_properties (HB_OT_Layout *layout,
HB_GlyphItem gitem,
HB_UShort flags,
HB_UShort* property)
{
HB_Error error;
if ( gdef )
{
HB_UShort basic_glyph_class;
HB_UShort desired_attachment_class;
if ( gitem->gproperties == HB_GLYPH_PROPERTIES_UNKNOWN )
{
error = HB_GDEF_Get_Glyph_Property( gdef, gitem->gindex, &gitem->gproperties );
if ( error )
return error;
}
*property = gitem->gproperties;
/* If the glyph was found in the MarkAttachmentClass table,
* then that class value is the high byte of the result,
* otherwise the low byte contains the basic type of the glyph
* as defined by the GlyphClassDef table.
*/
if ( *property & HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS )
basic_glyph_class = HB_GDEF_MARK;
else
basic_glyph_class = *property;
/* Return Not_Covered, if, for example, basic_glyph_class
* is HB_GDEF_LIGATURE and LookFlags includes HB_LOOKUP_FLAG_IGNORE_LIGATURES
*/
if ( flags & basic_glyph_class )
return HB_Err_Not_Covered;
/* The high byte of LookupFlags has the meaning
* "ignore marks of attachment type different than
* the attachment type specified."
*/
desired_attachment_class = flags & HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS;
if ( desired_attachment_class )
{
if ( basic_glyph_class == HB_GDEF_MARK &&
*property != desired_attachment_class )
return HB_Err_Not_Covered;
}
} else {
*property = 0;
}
return HB_Err_Ok;
}
#endif
hb_ot_layout_glyph_class_t
hb_ot_layout_get_glyph_class (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph)
hb_glyph_t glyph)
{
hb_ot_layout_glyph_properties_t properties;
hb_ot_layout_class_t klass;
@ -103,23 +190,22 @@ hb_ot_layout_get_glyph_class (HB_OT_Layout *layout,
void
hb_ot_layout_set_glyph_class (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph,
hb_glyph_t glyph,
hb_ot_layout_glyph_class_t klass)
{
/* TODO optimize this, similar to old harfbuzz code for example */
/* TODO our semantics are a bit different from old harfbuzz code too */
hb_ot_layout_class_t gdef_klass;
int len = layout->new_gdef.len;
if (glyph >= len) {
int new_len;
uint8_t *new_klasses;
unsigned char *new_klasses;
new_len = len == 0 ? 120 : 2 * len;
if (new_len > 65535)
new_len = 65535;
new_klasses = (uint8_t *) realloc (layout->new_gdef.klasses, new_len * sizeof (uint8_t));
new_klasses = (unsigned char *) realloc (layout->new_gdef.klasses, new_len * sizeof (unsigned char));
if (G_UNLIKELY (!new_klasses))
return;
@ -142,3 +228,24 @@ hb_ot_layout_set_glyph_class (HB_OT_Layout *layout,
layout->new_gdef.klasses[glyph] = gdef_klass;
return;
}
void
hb_ot_layout_build_glyph_classes (HB_OT_Layout *layout,
uint16_t num_total_glyphs,
hb_glyph_t *glyphs,
unsigned char *klasses,
uint16_t count)
{
int i;
if (G_UNLIKELY (!count || !glyphs || !klasses))
return;
if (layout->new_gdef.len == 0) {
layout->new_gdef.klasses = (unsigned char *) calloc (num_total_glyphs, sizeof (unsigned char));
layout->new_gdef.len = count;
}
for (i = 0; i < count; i++)
hb_ot_layout_set_glyph_class (layout, glyphs[i], (hb_ot_layout_glyph_class_t) klasses[i]);
}

27
src/hb-ot-layout.h
View File

@ -31,13 +31,6 @@
HB_BEGIN_DECLS();
typedef uint32_t hb_tag_t;
#define HB_TAG(a,b,c,d) ((hb_tag_t)(((uint8_t)a<<24)|((uint8_t)b<<16)|((uint8_t)c<<8)|(uint8_t)d))
#define HB_TAG_STR(s) (HB_TAG(((const char *) s)[0], \
((const char *) s)[1], \
((const char *) s)[2], \
((const char *) s)[3]))
typedef enum {
HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0x0000,
HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH = 0x0002,
@ -46,8 +39,6 @@ typedef enum {
HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT = 0x0010
} hb_ot_layout_glyph_class_t;
typedef uint16_t hb_ot_layout_glyph_t;
/*
* HB_OT_Layout
*/
@ -67,15 +58,29 @@ hb_ot_layout_create_sanitize (char *data,
make_writable_func);
*/
/*
* GDEF
*/
hb_bool_t
hb_ot_layout_has_font_glyph_classes (HB_OT_Layout *layout);
hb_ot_layout_glyph_class_t
hb_ot_layout_get_glyph_class (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph);
hb_glyph_t glyph);
void
hb_ot_layout_set_glyph_class (HB_OT_Layout *layout,
hb_ot_layout_glyph_t glyph,
hb_glyph_t glyph,
hb_ot_layout_glyph_class_t klass);
void
hb_ot_layout_build_glyph_classes (HB_OT_Layout *layout,
uint16_t num_total_glyphs,
hb_glyph_t *glyphs,
unsigned char *klasses,
uint16_t count);
HB_END_DECLS();
#endif /* HB_OT_LAYOUT_H */