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Group combining diacritics

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-01-07 16:37:53 +01:00
parent 89784252dc
commit 72f12cdcd9
7 changed files with 1116 additions and 561 deletions
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40
include/grub/bidi.h → include/grub/unicode.h
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@ -21,11 +21,12 @@
#include <grub/types.h>
struct grub_bidi_compact_range
struct grub_unicode_compact_range
{
grub_uint32_t start:24;
grub_uint32_t end:24;
grub_uint8_t type;
grub_uint32_t start:21;
grub_uint32_t end:21;
grub_uint8_t bidi_type:5;
grub_uint8_t comb_type;
} __attribute__ ((packed));
enum grub_bidi_type
@ -51,9 +52,36 @@ enum grub_bidi_type
GRUB_BIDI_TYPE_ON
};
extern struct grub_bidi_compact_range grub_bidi_compact[];
enum grub_comb_type
{
GRUB_UNICODE_STACK_BELOW = 220,
GRUB_UNICODE_STACK_ABOVE = 230,
/* If combining nature is indicated only by class and
not "combining type". */
GRUB_UNICODE_COMB_ME = 253,
GRUB_UNICODE_COMB_MC = 254,
GRUB_UNICODE_COMB_MN = 255,
};
#define GRUB_BIDI_MAX_CACHED_UNICODE_CHAR 0x20000
/* This structure describes a glyph as opposed to character. */
struct grub_unicode_glyph
{
grub_uint32_t base;
/* Unicode permits 256 variation selectors but since we need a value
for "default" we have to use grub_uint16_t. */
grub_uint16_t variant;
grub_size_t ncomb;
grub_uint32_t *combining;
};
#define GRUB_UNICODE_VARIATION_SELECTOR_1 0xfe00
#define GRUB_UNICODE_VARIATION_SELECTOR_16 0xfe0f
#define GRUB_UNICODE_VARIATION_SELECTOR_17 0xe0100
#define GRUB_UNICODE_VARIATION_SELECTOR_256 0xe01ef
extern struct grub_unicode_compact_range grub_unicode_compact[];
#define GRUB_UNICODE_MAX_CACHED_CHAR 0x20000
/* Unicode mandates an arbitrary limit. */
#define GRUB_BIDI_MAX_EXPLICIT_LEVEL 61