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[Indic] Minor

This commit is contained in:
Behdad Esfahbod 2012-08-02 05:01:11 -04:00
parent 6f76113755
commit 1d002048d5
2 changed files with 43 additions and 37 deletions
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16
src/hb-ot-shape-complex-indic-private.hh
View File

@ -38,22 +38,6 @@
#define indic_position() complex_var_persistent_u8_1() /* indic_matra_category_t */
#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base))
#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x900))
#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x980))
#define IS_GURM(u) (IN_HALF_BLOCK (u, 0xA00))
#define IS_GUJA(u) (IN_HALF_BLOCK (u, 0xA80))
#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0xB00))
#define IS_TAML(u) (IN_HALF_BLOCK (u, 0xB80))
#define IS_TELU(u) (IN_HALF_BLOCK (u, 0xC00))
#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0xC80))
#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0xD00))
#define IS_SINH(u) (IN_HALF_BLOCK (u, 0xD80))
#define INDIC_TABLE_ELEMENT_TYPE uint8_t
/* Cateories used in the OpenType spec:

64
src/hb-ot-shape-complex-indic.cc
View File

@ -28,18 +28,36 @@
#include "hb-ot-shape-private.hh"
#include "hb-ot-layout-private.hh"
#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base))
#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900))
#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980))
#define IS_GURM(u) (IN_HALF_BLOCK (u, 0x0A00))
#define IS_GUJA(u) (IN_HALF_BLOCK (u, 0x0A80))
#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00))
#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80))
#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00))
#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80))
#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00))
#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80))
#define IS_KHMR(u) (IN_HALF_BLOCK (u, 0x1780))
#define OLD_INDIC_TAG(script) (((hb_tag_t) script) | 0x20000000)
#define IS_OLD_INDIC_TAG(tag) ( \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_BENGALI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_DEVANAGARI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_GUJARATI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_GURMUKHI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_KANNADA) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_MALAYALAM) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_ORIYA) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_TAMIL) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_TELUGU) \
)
(tag) == OLD_INDIC_TAG (HB_SCRIPT_BENGALI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_DEVANAGARI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_GUJARATI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_GURMUKHI) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_KANNADA) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_MALAYALAM) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_ORIYA) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_TAMIL) || \
(tag) == OLD_INDIC_TAG (HB_SCRIPT_TELUGU) || \
0)
struct indic_options_t
{
int initialized : 1;
@ -123,10 +141,11 @@ consonant_position (hb_codepoint_t u,
hb_font_t *font)
{
if ((u & ~0x007F) == 0x1780)
return POS_BELOW_C; /* In Khmer coeng model, all are subjoining. */
return POS_BELOW_C; /* In Khmer coeng model, post and below forms should not be reordered. */
hb_codepoint_t virama = (u & ~0x007F) | 0x004D;
if ((u & ~0x007F) == 0x0D80) virama = 0x0DCA; /* Sinahla */
if ((u & ~0x007F) == 0x1780) virama = 0x17D2; /* Khmaer */
hb_codepoint_t glyphs[2];
unsigned int virama_pos = IS_OLD_INDIC_TAG (map->get_chosen_script (0)) ? 1 : 0;
@ -142,27 +161,29 @@ consonant_position (hb_codepoint_t u,
#define MATRA_POS_LEFT(u) POS_PRE_M
#define MATRA_POS_RIGHT(u) ( \
IS_DEVA(u) ? POS_AFTER_SUB : \
IS_BENG(u) ? POS_AFTER_POST : \
IS_GURM(u) ? POS_AFTER_POST : \
IS_GUJA(u) ? POS_AFTER_POST : \
IS_ORYA(u) ? POS_AFTER_POST : \
IS_TAML(u) ? POS_AFTER_POST : \
IS_DEVA(u) ? POS_AFTER_SUB : \
IS_BENG(u) ? POS_AFTER_POST : \
IS_GURM(u) ? POS_AFTER_POST : \
IS_GUJA(u) ? POS_AFTER_POST : \
IS_ORYA(u) ? POS_AFTER_POST : \
IS_TAML(u) ? POS_AFTER_POST : \
IS_TELU(u) ? (u <= 0x0C42 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
IS_KNDA(u) ? (u < 0x0CC3 || u > 0xCD6 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
IS_MLYM(u) ? POS_AFTER_POST : \
IS_SINH(u) ? POS_AFTER_SUB : \
/*default*/ POS_AFTER_SUB \
IS_MLYM(u) ? POS_AFTER_POST : \
IS_SINH(u) ? POS_AFTER_SUB : \
IS_KHMR(u) ? POS_AFTER_POST : \
/*default*/ POS_AFTER_SUB \
)
#define MATRA_POS_TOP(u) ( /* BENG and MLYM don't have top matras. */ \
IS_DEVA(u) ? POS_AFTER_SUB : \
IS_GURM(u) ? POS_AFTER_POST : /* Deviate from spec */ \
IS_GURM(u) ? POS_AFTER_POST : /* Deviate from spec */ \
IS_GUJA(u) ? POS_AFTER_SUB : \
IS_ORYA(u) ? POS_AFTER_MAIN : \
IS_TAML(u) ? POS_AFTER_SUB : \
IS_TELU(u) ? POS_BEFORE_SUB : \
IS_KNDA(u) ? POS_BEFORE_SUB : \
IS_SINH(u) ? POS_AFTER_SUB : \
IS_KHMR(u) ? POS_AFTER_POST : \
/*default*/ POS_AFTER_SUB \
)
#define MATRA_POS_BOTTOM(u) ( \
@ -176,6 +197,7 @@ consonant_position (hb_codepoint_t u,
IS_KNDA(u) ? POS_BEFORE_SUB : \
IS_MLYM(u) ? POS_AFTER_POST : \
IS_SINH(u) ? POS_AFTER_SUB : \
IS_KHMR(u) ? POS_AFTER_POST : \
/*default*/ POS_AFTER_SUB \
)