From c0505f3bb28feeba95b201e6464fb2fdac90194a Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Thu, 3 Nov 2005 20:13:40 +0000 Subject: [PATCH] Patches from #170414. Reviewed by Matthias Clasen. 2005-11-03 Behdad Esfahbod Patches from #170414. Reviewed by Matthias Clasen. * pango/opentype/ftxgpos.c, pango/opentype/ftxgsub.c: Use call table to dispatch different lookup types. * pango/opentype/pango-ot-buffer.c, pango/opentype/pango-ot-ruleset.c: Small cleanup. --- src/ftxgpos.c | 143 ++++++++++++++++++++++++------------------------- src/ftxgsub.c | 115 +++++++++++++++++++++------------------ src/pango-ot-buffer.c | 3 +- src/pango-ot-ruleset.c | 75 +++++++++----------------- 4 files changed, 159 insertions(+), 177 deletions(-) diff --git a/src/ftxgpos.c b/src/ftxgpos.c index a3d163e..d474318 100644 --- a/src/ftxgpos.c +++ b/src/ftxgpos.c @@ -1027,16 +1027,27 @@ Free_Coverage( &sp->Coverage, memory ); } + static FT_Error Lookup_DefaultPos( GPOS_Instance* gpi, + TTO_GPOS_SubTable* st, + OTL_Buffer buffer, + FT_UShort flags, + FT_UShort context_length, + int nesting_level ) + { + return TTO_Err_Not_Covered; + } static FT_Error Lookup_SinglePos( GPOS_Instance* gpi, - TTO_SinglePos* sp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_UShort index, property; FT_Error error; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_SinglePos* sp = &st->single; if ( context_length != 0xFFFF && context_length < 1 ) @@ -1588,14 +1599,16 @@ static FT_Error Lookup_PairPos( GPOS_Instance* gpi, - TTO_PairPos* pp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_Error error; FT_UShort index, property, first_pos; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_PairPos* pp = &st->pair; if ( buffer->in_pos >= buffer->in_length - 1 ) @@ -1794,14 +1807,16 @@ static FT_Error Lookup_CursivePos( GPOS_Instance* gpi, - TTO_CursivePos* cp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_UShort index, property; FT_Error error; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_CursivePos* cp = &st->cursive; TTO_EntryExitRecord* eer; FT_Pos entry_x, entry_y; @@ -2219,15 +2234,17 @@ static FT_Error Lookup_MarkBasePos( GPOS_Instance* gpi, - TTO_MarkBasePos* mbp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_UShort i, j, mark_index, base_index, property, class; FT_Pos x_mark_value, y_mark_value, x_base_value, y_base_value; FT_Error error; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_MarkBasePos* mbp = &st->markbase; TTO_MarkArray* ma; TTO_BaseArray* ba; @@ -2626,16 +2643,18 @@ static FT_Error Lookup_MarkLigPos( GPOS_Instance* gpi, - TTO_MarkLigPos* mlp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_UShort i, j, mark_index, lig_index, property, class; FT_UShort mark_glyph; FT_Pos x_mark_value, y_mark_value, x_lig_value, y_lig_value; FT_Error error; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_MarkLigPos* mlp = &st->marklig; TTO_MarkArray* ma; TTO_LigatureArray* la; @@ -2965,16 +2984,18 @@ static FT_Error Lookup_MarkMarkPos( GPOS_Instance* gpi, - TTO_MarkMarkPos* mmp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, - FT_UShort context_length ) + FT_UShort context_length, + int nesting_level ) { FT_UShort j, mark1_index, mark2_index, property, class; FT_Pos x_mark1_value, y_mark1_value, x_mark2_value, y_mark2_value; FT_Error error; TTO_GPOSHeader* gpos = gpi->gpos; + TTO_MarkMarkPos* mmp = &st->markmark; TTO_MarkArray* ma1; TTO_Mark2Array* ma2; @@ -4055,12 +4076,14 @@ static FT_Error Lookup_ContextPos( GPOS_Instance* gpi, - TTO_ContextPos* cp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, int nesting_level ) { + TTO_ContextPos* cp = &st->context; + switch ( cp->PosFormat ) { case 1: @@ -5543,12 +5566,14 @@ static FT_Error Lookup_ChainContextPos( GPOS_Instance* gpi, - TTO_ChainContextPos* ccp, + TTO_GPOS_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, int nesting_level ) { + TTO_ChainContextPos* ccp = &st->chain; + switch ( ccp->PosFormat ) { case 1: @@ -5863,6 +5888,25 @@ } + typedef FT_Error (*Lookup_Func_Type) ( GPOS_Instance* gpi, + TTO_GPOS_SubTable* st, + OTL_Buffer buffer, + FT_UShort flags, + FT_UShort context_length, + int nesting_level ); + static const Lookup_Func_Type Lookup_Call_Table[] = { + Lookup_DefaultPos, + Lookup_SinglePos, /* GPOS_LOOKUP_SINGLE 1 */ + Lookup_PairPos, /* GPOS_LOOKUP_PAIR 2 */ + Lookup_CursivePos, /* GPOS_LOOKUP_CURSIVE 3 */ + Lookup_MarkBasePos, /* GPOS_LOOKUP_MARKBASE 4 */ + Lookup_MarkLigPos, /* GPOS_LOOKUP_MARKLIG 5 */ + Lookup_MarkMarkPos, /* GPOS_LOOKUP_MARKMARK 6 */ + Lookup_ContextPos, /* GPOS_LOOKUP_CONTEXT 7 */ + Lookup_ChainContextPos, /* GPOS_LOOKUP_CHAIN 8 */ + Lookup_DefaultPos, /* GPOS_LOOKUP_EXTENSION 9 */ + }; + /* Do an individual subtable lookup. Returns TT_Err_Ok if positioning has been done, or TTO_Err_Not_Covered if not. */ @@ -5876,6 +5920,8 @@ FT_UShort i, flags, lookup_count; TTO_GPOSHeader* gpos = gpi->gpos; TTO_Lookup* lo; + int lt; + Lookup_Func_Type Lookup_Func; nesting_level++; @@ -5889,69 +5935,18 @@ lo = &gpos->LookupList.Lookup[lookup_index]; flags = lo->LookupFlag; + lt = lo->LookupType; + if (lt >= sizeof Lookup_Call_Table / sizeof Lookup_Call_Table[0]) + lt = 0; + Lookup_Func = Lookup_Call_Table[lt]; for ( i = 0; i < lo->SubTableCount; i++ ) { - switch ( lo->LookupType ) - { - case GPOS_LOOKUP_SINGLE: - error = Lookup_SinglePos( gpi, - &lo->SubTable[i].st.gpos.single, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_PAIR: - error = Lookup_PairPos( gpi, - &lo->SubTable[i].st.gpos.pair, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_CURSIVE: - error = Lookup_CursivePos( gpi, - &lo->SubTable[i].st.gpos.cursive, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_MARKBASE: - error = Lookup_MarkBasePos( gpi, - &lo->SubTable[i].st.gpos.markbase, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_MARKLIG: - error = Lookup_MarkLigPos( gpi, - &lo->SubTable[i].st.gpos.marklig, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_MARKMARK: - error = Lookup_MarkMarkPos( gpi, - &lo->SubTable[i].st.gpos.markmark, - buffer, - flags, context_length ); - break; - - case GPOS_LOOKUP_CONTEXT: - error = Lookup_ContextPos( gpi, - &lo->SubTable[i].st.gpos.context, - buffer, - flags, context_length, - nesting_level ); - break; - - case GPOS_LOOKUP_CHAIN: - error = Lookup_ChainContextPos( gpi, - &lo->SubTable[i].st.gpos.chain, - buffer, - flags, context_length, - nesting_level ); - break; - } + error = Lookup_Func ( gpi, + &lo->SubTable[i].st.gpos, + buffer, + flags, context_length, + nesting_level ); /* Check whether we have a successful positioning or an error other than TTO_Err_Not_Covered */ diff --git a/src/ftxgsub.c b/src/ftxgsub.c index 6f085cc..1e8afaa 100644 --- a/src/ftxgsub.c +++ b/src/ftxgsub.c @@ -208,6 +208,16 @@ * SubTable related functions *****************************/ + static FT_Error Lookup_DefaultSubst( TTO_GSUBHeader* gsub, + TTO_GSUB_SubTable* st, + OTL_Buffer buffer, + FT_UShort flags, + FT_UShort context_length, + int nesting_level ) + { + return TTO_Err_Not_Covered; + } + /* LookupType 1 */ @@ -311,14 +321,17 @@ } - static FT_Error Lookup_SingleSubst( TTO_SingleSubst* ss, + static FT_Error Lookup_SingleSubst( TTO_GSUBHeader* gsub, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, - TTO_GDEFHeader* gdef ) + int nesting_level ) { FT_UShort index, value, property; FT_Error error; + TTO_SingleSubst* ss = &st->single; + TTO_GDEFHeader* gdef = gsub->gdef; if ( context_length != 0xFFFF && context_length < 1 ) @@ -514,15 +527,18 @@ } - static FT_Error Lookup_MultipleSubst( TTO_MultipleSubst* ms, + static FT_Error Lookup_MultipleSubst( TTO_GSUBHeader* gsub, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, - TTO_GDEFHeader* gdef ) + int nesting_level ) { FT_Error error; FT_UShort index, property, n, count; FT_UShort*s; + TTO_MultipleSubst* ms = &st->multiple; + TTO_GDEFHeader* gdef = gsub->gdef; if ( context_length != 0xFFFF && context_length < 1 ) @@ -711,14 +727,17 @@ static FT_Error Lookup_AlternateSubst( TTO_GSUBHeader* gsub, - TTO_AlternateSubst* as, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, - TTO_GDEFHeader* gdef ) + int nesting_level ) { FT_Error error; FT_UShort index, alt_index, property; + TTO_AlternateSubst* as = &st->alternate; + TTO_GDEFHeader* gdef = gsub->gdef; + TTO_AlternateSet aset; @@ -990,16 +1009,19 @@ } - static FT_Error Lookup_LigatureSubst( TTO_LigatureSubst* ls, + static FT_Error Lookup_LigatureSubst( TTO_GSUBHeader* gsub, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, - TTO_GDEFHeader* gdef ) + int nesting_level ) { FT_UShort index, property; FT_Error error; FT_UShort numlig, i, j, is_mark, first_is_mark = FALSE; FT_UShort* c; + TTO_LigatureSubst* ls = &st->ligature; + TTO_GDEFHeader* gdef = gsub->gdef; TTO_Ligature* lig; @@ -2112,12 +2134,14 @@ static FT_Error Lookup_ContextSubst( TTO_GSUBHeader* gsub, - TTO_ContextSubst* cs, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, int nesting_level ) { + TTO_ContextSubst* cs = &st->context; + switch ( cs->SubstFormat ) { case 1: @@ -3604,12 +3628,14 @@ static FT_Error Lookup_ChainContextSubst( TTO_GSUBHeader* gsub, - TTO_ChainContextSubst* ccs, + TTO_GSUB_SubTable* st, OTL_Buffer buffer, FT_UShort flags, FT_UShort context_length, int nesting_level ) { + TTO_ChainContextSubst* ccs = &st->chain; + switch ( ccs->SubstFormat ) { case 1: @@ -3930,6 +3956,23 @@ } + typedef FT_Error (*Lookup_Func_Type) ( TTO_GSUBHeader* gsub, + TTO_GSUB_SubTable* st, + OTL_Buffer buffer, + FT_UShort flags, + FT_UShort context_length, + int nesting_level ); + static const Lookup_Func_Type Lookup_Call_Table[] = { + Lookup_DefaultSubst, + Lookup_SingleSubst, /* GSUB_LOOKUP_SINGLE 1 */ + Lookup_MultipleSubst, /* GSUB_LOOKUP_MULTIPLE 2 */ + Lookup_AlternateSubst, /* GSUB_LOOKUP_ALTERNATE 3 */ + Lookup_LigatureSubst, /* GSUB_LOOKUP_LIGATURE 4 */ + Lookup_ContextSubst, /* GSUB_LOOKUP_CONTEXT 5 */ + Lookup_ChainContextSubst, /* GSUB_LOOKUP_CHAIN 6 */ + Lookup_DefaultSubst, /* GSUB_LOOKUP_EXTENSION 7 */ + }; + /* Do an individual subtable lookup. Returns TT_Err_Ok if substitution has been done, or TTO_Err_Not_Covered if not. */ @@ -3942,6 +3985,8 @@ FT_Error error = TTO_Err_Not_Covered; FT_UShort i, flags, lookup_count; TTO_Lookup* lo; + int lt; + Lookup_Func_Type Lookup_Func; nesting_level++; @@ -3955,50 +4000,18 @@ lo = &gsub->LookupList.Lookup[lookup_index]; flags = lo->LookupFlag; + lt = lo->LookupType; + if (lt >= sizeof Lookup_Call_Table / sizeof Lookup_Call_Table[0]) + lt = 0; + Lookup_Func = Lookup_Call_Table[lt]; for ( i = 0; i < lo->SubTableCount; i++ ) { - switch ( lo->LookupType ) - { - case GSUB_LOOKUP_SINGLE: - error = Lookup_SingleSubst( &lo->SubTable[i].st.gsub.single, - buffer, - flags, context_length, gsub->gdef ); - break; - - case GSUB_LOOKUP_MULTIPLE: - error = Lookup_MultipleSubst( &lo->SubTable[i].st.gsub.multiple, - buffer, - flags, context_length, gsub->gdef ); - break; - - case GSUB_LOOKUP_ALTERNATE: - error = Lookup_AlternateSubst( gsub, - &lo->SubTable[i].st.gsub.alternate, - buffer, - flags, context_length, gsub->gdef ); - break; - - case GSUB_LOOKUP_LIGATURE: - error = Lookup_LigatureSubst( &lo->SubTable[i].st.gsub.ligature, - buffer, - flags, context_length, gsub->gdef ); - break; - - case GSUB_LOOKUP_CONTEXT: - error = Lookup_ContextSubst( gsub, &lo->SubTable[i].st.gsub.context, - buffer, - flags, context_length, nesting_level ); - break; - - case GSUB_LOOKUP_CHAIN: - error = Lookup_ChainContextSubst( gsub, - &lo->SubTable[i].st.gsub.chain, - buffer, - flags, context_length, - nesting_level ); - break; - } + error = Lookup_Func ( gsub, + &lo->SubTable[i].st.gsub, + buffer, + flags, context_length, + nesting_level ); /* Check whether we have a successful substitution or an error other than TTO_Err_Not_Covered */ diff --git a/src/pango-ot-buffer.c b/src/pango-ot-buffer.c index 17e6e4f..057739f 100644 --- a/src/pango-ot-buffer.c +++ b/src/pango-ot-buffer.c @@ -79,8 +79,7 @@ void pango_ot_buffer_set_rtl (PangoOTBuffer *buffer, gboolean rtl) { - rtl = rtl != FALSE; - buffer->rtl = rtl; + buffer->rtl = rtl != FALSE; } /** diff --git a/src/pango-ot-ruleset.c b/src/pango-ot-ruleset.c index 5981ae8..780814b 100644 --- a/src/pango-ot-ruleset.c +++ b/src/pango-ot-ruleset.c @@ -144,40 +144,27 @@ pango_ot_ruleset_substitute (PangoOTRuleset *ruleset, TTO_GSUB gsub = NULL; - gboolean need_gsub = FALSE; - g_return_if_fail (PANGO_OT_IS_RULESET (ruleset)); for (i = 0; i < ruleset->rules->len; i++) { PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i); - if (rule->table_type == PANGO_OT_TABLE_GSUB) - need_gsub = TRUE; - } - - if (need_gsub) - { - - gsub = pango_ot_info_get_gsub (ruleset->info); - - if (gsub) - TT_GSUB_Clear_Features (gsub); - } - - for (i = 0; i < ruleset->rules->len; i++) - { - PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i); + if (rule->table_type != PANGO_OT_TABLE_GSUB) + continue; - if (rule->table_type == PANGO_OT_TABLE_GSUB) + if (!gsub) { + gsub = pango_ot_info_get_gsub (ruleset->info); + if (gsub) - TT_GSUB_Add_Feature (gsub, rule->feature_index, rule->property_bit); + TT_GSUB_Clear_Features (gsub); + else + return; } - } - if (!gsub) - return; + TT_GSUB_Add_Feature (gsub, rule->feature_index, rule->property_bit); + } TT_GSUB_Apply_String (gsub, buffer->buffer); } @@ -190,43 +177,31 @@ pango_ot_ruleset_position (PangoOTRuleset *ruleset, TTO_GPOS gpos = NULL; - gboolean need_gpos = FALSE; - g_return_if_fail (PANGO_OT_IS_RULESET (ruleset)); for (i = 0; i < ruleset->rules->len; i++) { PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i); - if (rule->table_type == PANGO_OT_TABLE_GPOS) - need_gpos = TRUE; - } + if (rule->table_type != PANGO_OT_TABLE_GPOS) + continue; - if (need_gpos) - gpos = pango_ot_info_get_gpos (ruleset->info); + if (!gpos) + { + gpos = pango_ot_info_get_gpos (ruleset->info); - if (gpos) - { - TT_GPOS_Clear_Features (gpos); + if (gpos) + TT_GPOS_Clear_Features (gpos); + else + return; + } - for (i = 0; i < ruleset->rules->len; i++) - { - PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i); - - if (rule->table_type == PANGO_OT_TABLE_GPOS) - TT_GPOS_Add_Feature (gpos, rule->feature_index, rule->property_bit); - } + TT_GPOS_Add_Feature (gpos, rule->feature_index, rule->property_bit); } - /* Apply GPOS rules */ - if (gpos) - { - if (TT_GPOS_Apply_String (ruleset->info->face, gpos, 0, buffer->buffer, - FALSE /* enable device-dependant values */, - buffer->rtl) == FT_Err_Ok) - { - buffer->applied_gpos = TRUE; - } - } + if (TT_GPOS_Apply_String (ruleset->info->face, gpos, 0, buffer->buffer, + FALSE /* enable device-dependant values */, + buffer->rtl) == FT_Err_Ok) + buffer->applied_gpos = TRUE; } -- 2.7.4