diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/src/pshinter/pshrec.c --- a/misc/libfreetype/src/pshinter/pshrec.c Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1224 +0,0 @@ -/***************************************************************************/ -/* */ -/* pshrec.c */ -/* */ -/* FreeType PostScript hints recorder (body). */ -/* */ -/* Copyright 2001, 2002, 2003, 2004, 2007, 2009 by */ -/* David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used, */ -/* modified, and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - -#include -#include FT_FREETYPE_H -#include FT_INTERNAL_OBJECTS_H -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_CALC_H - -#include "pshrec.h" -#include "pshalgo.h" - -#include "pshnterr.h" - -#undef FT_COMPONENT -#define FT_COMPONENT trace_pshrec - -#ifdef DEBUG_HINTER - PS_Hints ps_debug_hints = 0; - int ps_debug_no_horz_hints = 0; - int ps_debug_no_vert_hints = 0; -#endif - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** PS_HINT MANAGEMENT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - /* destroy hints table */ - static void - ps_hint_table_done( PS_Hint_Table table, - FT_Memory memory ) - { - FT_FREE( table->hints ); - table->num_hints = 0; - table->max_hints = 0; - } - - - /* ensure that a table can contain "count" elements */ - static FT_Error - ps_hint_table_ensure( PS_Hint_Table table, - FT_UInt count, - FT_Memory memory ) - { - FT_UInt old_max = table->max_hints; - FT_UInt new_max = count; - FT_Error error = PSH_Err_Ok; - - - if ( new_max > old_max ) - { - /* try to grow the table */ - new_max = FT_PAD_CEIL( new_max, 8 ); - if ( !FT_RENEW_ARRAY( table->hints, old_max, new_max ) ) - table->max_hints = new_max; - } - return error; - } - - - static FT_Error - ps_hint_table_alloc( PS_Hint_Table table, - FT_Memory memory, - PS_Hint *ahint ) - { - FT_Error error = PSH_Err_Ok; - FT_UInt count; - PS_Hint hint = 0; - - - count = table->num_hints; - count++; - - if ( count >= table->max_hints ) - { - error = ps_hint_table_ensure( table, count, memory ); - if ( error ) - goto Exit; - } - - hint = table->hints + count - 1; - hint->pos = 0; - hint->len = 0; - hint->flags = 0; - - table->num_hints = count; - - Exit: - *ahint = hint; - return error; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** PS_MASK MANAGEMENT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - /* destroy mask */ - static void - ps_mask_done( PS_Mask mask, - FT_Memory memory ) - { - FT_FREE( mask->bytes ); - mask->num_bits = 0; - mask->max_bits = 0; - mask->end_point = 0; - } - - - /* ensure that a mask can contain "count" bits */ - static FT_Error - ps_mask_ensure( PS_Mask mask, - FT_UInt count, - FT_Memory memory ) - { - FT_UInt old_max = ( mask->max_bits + 7 ) >> 3; - FT_UInt new_max = ( count + 7 ) >> 3; - FT_Error error = PSH_Err_Ok; - - - if ( new_max > old_max ) - { - new_max = FT_PAD_CEIL( new_max, 8 ); - if ( !FT_RENEW_ARRAY( mask->bytes, old_max, new_max ) ) - mask->max_bits = new_max * 8; - } - return error; - } - - - /* test a bit value in a given mask */ - static FT_Int - ps_mask_test_bit( PS_Mask mask, - FT_Int idx ) - { - if ( (FT_UInt)idx >= mask->num_bits ) - return 0; - - return mask->bytes[idx >> 3] & ( 0x80 >> ( idx & 7 ) ); - } - - - /* clear a given bit */ - static void - ps_mask_clear_bit( PS_Mask mask, - FT_Int idx ) - { - FT_Byte* p; - - - if ( (FT_UInt)idx >= mask->num_bits ) - return; - - p = mask->bytes + ( idx >> 3 ); - p[0] = (FT_Byte)( p[0] & ~( 0x80 >> ( idx & 7 ) ) ); - } - - - /* set a given bit, possibly grow the mask */ - static FT_Error - ps_mask_set_bit( PS_Mask mask, - FT_Int idx, - FT_Memory memory ) - { - FT_Error error = PSH_Err_Ok; - FT_Byte* p; - - - if ( idx < 0 ) - goto Exit; - - if ( (FT_UInt)idx >= mask->num_bits ) - { - error = ps_mask_ensure( mask, idx + 1, memory ); - if ( error ) - goto Exit; - - mask->num_bits = idx + 1; - } - - p = mask->bytes + ( idx >> 3 ); - p[0] = (FT_Byte)( p[0] | ( 0x80 >> ( idx & 7 ) ) ); - - Exit: - return error; - } - - - /* destroy mask table */ - static void - ps_mask_table_done( PS_Mask_Table table, - FT_Memory memory ) - { - FT_UInt count = table->max_masks; - PS_Mask mask = table->masks; - - - for ( ; count > 0; count--, mask++ ) - ps_mask_done( mask, memory ); - - FT_FREE( table->masks ); - table->num_masks = 0; - table->max_masks = 0; - } - - - /* ensure that a mask table can contain "count" masks */ - static FT_Error - ps_mask_table_ensure( PS_Mask_Table table, - FT_UInt count, - FT_Memory memory ) - { - FT_UInt old_max = table->max_masks; - FT_UInt new_max = count; - FT_Error error = PSH_Err_Ok; - - - if ( new_max > old_max ) - { - new_max = FT_PAD_CEIL( new_max, 8 ); - if ( !FT_RENEW_ARRAY( table->masks, old_max, new_max ) ) - table->max_masks = new_max; - } - return error; - } - - - /* allocate a new mask in a table */ - static FT_Error - ps_mask_table_alloc( PS_Mask_Table table, - FT_Memory memory, - PS_Mask *amask ) - { - FT_UInt count; - FT_Error error = PSH_Err_Ok; - PS_Mask mask = 0; - - - count = table->num_masks; - count++; - - if ( count > table->max_masks ) - { - error = ps_mask_table_ensure( table, count, memory ); - if ( error ) - goto Exit; - } - - mask = table->masks + count - 1; - mask->num_bits = 0; - mask->end_point = 0; - table->num_masks = count; - - Exit: - *amask = mask; - return error; - } - - - /* return last hint mask in a table, create one if the table is empty */ - static FT_Error - ps_mask_table_last( PS_Mask_Table table, - FT_Memory memory, - PS_Mask *amask ) - { - FT_Error error = PSH_Err_Ok; - FT_UInt count; - PS_Mask mask; - - - count = table->num_masks; - if ( count == 0 ) - { - error = ps_mask_table_alloc( table, memory, &mask ); - if ( error ) - goto Exit; - } - else - mask = table->masks + count - 1; - - Exit: - *amask = mask; - return error; - } - - - /* set a new mask to a given bit range */ - static FT_Error - ps_mask_table_set_bits( PS_Mask_Table table, - const FT_Byte* source, - FT_UInt bit_pos, - FT_UInt bit_count, - FT_Memory memory ) - { - FT_Error error = PSH_Err_Ok; - PS_Mask mask; - - - error = ps_mask_table_last( table, memory, &mask ); - if ( error ) - goto Exit; - - error = ps_mask_ensure( mask, bit_count, memory ); - if ( error ) - goto Exit; - - mask->num_bits = bit_count; - - /* now, copy bits */ - { - FT_Byte* read = (FT_Byte*)source + ( bit_pos >> 3 ); - FT_Int rmask = 0x80 >> ( bit_pos & 7 ); - FT_Byte* write = mask->bytes; - FT_Int wmask = 0x80; - FT_Int val; - - - for ( ; bit_count > 0; bit_count-- ) - { - val = write[0] & ~wmask; - - if ( read[0] & rmask ) - val |= wmask; - - write[0] = (FT_Byte)val; - - rmask >>= 1; - if ( rmask == 0 ) - { - read++; - rmask = 0x80; - } - - wmask >>= 1; - if ( wmask == 0 ) - { - write++; - wmask = 0x80; - } - } - } - - Exit: - return error; - } - - - /* test whether two masks in a table intersect */ - static FT_Int - ps_mask_table_test_intersect( PS_Mask_Table table, - FT_Int index1, - FT_Int index2 ) - { - PS_Mask mask1 = table->masks + index1; - PS_Mask mask2 = table->masks + index2; - FT_Byte* p1 = mask1->bytes; - FT_Byte* p2 = mask2->bytes; - FT_UInt count1 = mask1->num_bits; - FT_UInt count2 = mask2->num_bits; - FT_UInt count; - - - count = ( count1 <= count2 ) ? count1 : count2; - for ( ; count >= 8; count -= 8 ) - { - if ( p1[0] & p2[0] ) - return 1; - - p1++; - p2++; - } - - if ( count == 0 ) - return 0; - - return ( p1[0] & p2[0] ) & ~( 0xFF >> count ); - } - - - /* merge two masks, used by ps_mask_table_merge_all */ - static FT_Error - ps_mask_table_merge( PS_Mask_Table table, - FT_Int index1, - FT_Int index2, - FT_Memory memory ) - { - FT_UInt temp; - FT_Error error = PSH_Err_Ok; - - - /* swap index1 and index2 so that index1 < index2 */ - if ( index1 > index2 ) - { - temp = index1; - index1 = index2; - index2 = temp; - } - - if ( index1 < index2 && index1 >= 0 && index2 < (FT_Int)table->num_masks ) - { - /* we need to merge the bitsets of index1 and index2 with a */ - /* simple union */ - PS_Mask mask1 = table->masks + index1; - PS_Mask mask2 = table->masks + index2; - FT_UInt count1 = mask1->num_bits; - FT_UInt count2 = mask2->num_bits; - FT_Int delta; - - - if ( count2 > 0 ) - { - FT_UInt pos; - FT_Byte* read; - FT_Byte* write; - - - /* if "count2" is greater than "count1", we need to grow the */ - /* first bitset, and clear the highest bits */ - if ( count2 > count1 ) - { - error = ps_mask_ensure( mask1, count2, memory ); - if ( error ) - goto Exit; - - for ( pos = count1; pos < count2; pos++ ) - ps_mask_clear_bit( mask1, pos ); - } - - /* merge (unite) the bitsets */ - read = mask2->bytes; - write = mask1->bytes; - pos = (FT_UInt)( ( count2 + 7 ) >> 3 ); - - for ( ; pos > 0; pos-- ) - { - write[0] = (FT_Byte)( write[0] | read[0] ); - write++; - read++; - } - } - - /* Now, remove "mask2" from the list. We need to keep the masks */ - /* sorted in order of importance, so move table elements. */ - mask2->num_bits = 0; - mask2->end_point = 0; - - delta = table->num_masks - 1 - index2; /* number of masks to move */ - if ( delta > 0 ) - { - /* move to end of table for reuse */ - PS_MaskRec dummy = *mask2; - - - ft_memmove( mask2, mask2 + 1, delta * sizeof ( PS_MaskRec ) ); - - mask2[delta] = dummy; - } - - table->num_masks--; - } - else - FT_TRACE0(( "ps_mask_table_merge: ignoring invalid indices (%d,%d)\n", - index1, index2 )); - - Exit: - return error; - } - - - /* Try to merge all masks in a given table. This is used to merge */ - /* all counter masks into independent counter "paths". */ - /* */ - static FT_Error - ps_mask_table_merge_all( PS_Mask_Table table, - FT_Memory memory ) - { - FT_Int index1, index2; - FT_Error error = PSH_Err_Ok; - - - for ( index1 = table->num_masks - 1; index1 > 0; index1-- ) - { - for ( index2 = index1 - 1; index2 >= 0; index2-- ) - { - if ( ps_mask_table_test_intersect( table, index1, index2 ) ) - { - error = ps_mask_table_merge( table, index2, index1, memory ); - if ( error ) - goto Exit; - - break; - } - } - } - - Exit: - return error; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** PS_DIMENSION MANAGEMENT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - /* finalize a given dimension */ - static void - ps_dimension_done( PS_Dimension dimension, - FT_Memory memory ) - { - ps_mask_table_done( &dimension->counters, memory ); - ps_mask_table_done( &dimension->masks, memory ); - ps_hint_table_done( &dimension->hints, memory ); - } - - - /* initialize a given dimension */ - static void - ps_dimension_init( PS_Dimension dimension ) - { - dimension->hints.num_hints = 0; - dimension->masks.num_masks = 0; - dimension->counters.num_masks = 0; - } - - -#if 0 - - /* set a bit at a given index in the current hint mask */ - static FT_Error - ps_dimension_set_mask_bit( PS_Dimension dim, - FT_UInt idx, - FT_Memory memory ) - { - PS_Mask mask; - FT_Error error = PSH_Err_Ok; - - - /* get last hint mask */ - error = ps_mask_table_last( &dim->masks, memory, &mask ); - if ( error ) - goto Exit; - - error = ps_mask_set_bit( mask, idx, memory ); - - Exit: - return error; - } - -#endif - - /* set the end point in a mask, called from "End" & "Reset" methods */ - static void - ps_dimension_end_mask( PS_Dimension dim, - FT_UInt end_point ) - { - FT_UInt count = dim->masks.num_masks; - PS_Mask mask; - - - if ( count > 0 ) - { - mask = dim->masks.masks + count - 1; - mask->end_point = end_point; - } - } - - - /* set the end point in the current mask, then create a new empty one */ - /* (called by "Reset" method) */ - static FT_Error - ps_dimension_reset_mask( PS_Dimension dim, - FT_UInt end_point, - FT_Memory memory ) - { - PS_Mask mask; - - - /* end current mask */ - ps_dimension_end_mask( dim, end_point ); - - /* allocate new one */ - return ps_mask_table_alloc( &dim->masks, memory, &mask ); - } - - - /* set a new mask, called from the "T2Stem" method */ - static FT_Error - ps_dimension_set_mask_bits( PS_Dimension dim, - const FT_Byte* source, - FT_UInt source_pos, - FT_UInt source_bits, - FT_UInt end_point, - FT_Memory memory ) - { - FT_Error error = PSH_Err_Ok; - - - /* reset current mask, if any */ - error = ps_dimension_reset_mask( dim, end_point, memory ); - if ( error ) - goto Exit; - - /* set bits in new mask */ - error = ps_mask_table_set_bits( &dim->masks, source, - source_pos, source_bits, memory ); - - Exit: - return error; - } - - - /* add a new single stem (called from "T1Stem" method) */ - static FT_Error - ps_dimension_add_t1stem( PS_Dimension dim, - FT_Int pos, - FT_Int len, - FT_Memory memory, - FT_Int *aindex ) - { - FT_Error error = PSH_Err_Ok; - FT_UInt flags = 0; - - - /* detect ghost stem */ - if ( len < 0 ) - { - flags |= PS_HINT_FLAG_GHOST; - if ( len == -21 ) - { - flags |= PS_HINT_FLAG_BOTTOM; - pos += len; - } - len = 0; - } - - if ( aindex ) - *aindex = -1; - - /* now, lookup stem in the current hints table */ - { - PS_Mask mask; - FT_UInt idx; - FT_UInt max = dim->hints.num_hints; - PS_Hint hint = dim->hints.hints; - - - for ( idx = 0; idx < max; idx++, hint++ ) - { - if ( hint->pos == pos && hint->len == len ) - break; - } - - /* we need to create a new hint in the table */ - if ( idx >= max ) - { - error = ps_hint_table_alloc( &dim->hints, memory, &hint ); - if ( error ) - goto Exit; - - hint->pos = pos; - hint->len = len; - hint->flags = flags; - } - - /* now, store the hint in the current mask */ - error = ps_mask_table_last( &dim->masks, memory, &mask ); - if ( error ) - goto Exit; - - error = ps_mask_set_bit( mask, idx, memory ); - if ( error ) - goto Exit; - - if ( aindex ) - *aindex = (FT_Int)idx; - } - - Exit: - return error; - } - - - /* add a "hstem3/vstem3" counter to our dimension table */ - static FT_Error - ps_dimension_add_counter( PS_Dimension dim, - FT_Int hint1, - FT_Int hint2, - FT_Int hint3, - FT_Memory memory ) - { - FT_Error error = PSH_Err_Ok; - FT_UInt count = dim->counters.num_masks; - PS_Mask counter = dim->counters.masks; - - - /* try to find an existing counter mask that already uses */ - /* one of these stems here */ - for ( ; count > 0; count--, counter++ ) - { - if ( ps_mask_test_bit( counter, hint1 ) || - ps_mask_test_bit( counter, hint2 ) || - ps_mask_test_bit( counter, hint3 ) ) - break; - } - - /* create a new counter when needed */ - if ( count == 0 ) - { - error = ps_mask_table_alloc( &dim->counters, memory, &counter ); - if ( error ) - goto Exit; - } - - /* now, set the bits for our hints in the counter mask */ - error = ps_mask_set_bit( counter, hint1, memory ); - if ( error ) - goto Exit; - - error = ps_mask_set_bit( counter, hint2, memory ); - if ( error ) - goto Exit; - - error = ps_mask_set_bit( counter, hint3, memory ); - if ( error ) - goto Exit; - - Exit: - return error; - } - - - /* end of recording session for a given dimension */ - static FT_Error - ps_dimension_end( PS_Dimension dim, - FT_UInt end_point, - FT_Memory memory ) - { - /* end hint mask table */ - ps_dimension_end_mask( dim, end_point ); - - /* merge all counter masks into independent "paths" */ - return ps_mask_table_merge_all( &dim->counters, memory ); - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** PS_RECORDER MANAGEMENT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - /* destroy hints */ - FT_LOCAL( void ) - ps_hints_done( PS_Hints hints ) - { - FT_Memory memory = hints->memory; - - - ps_dimension_done( &hints->dimension[0], memory ); - ps_dimension_done( &hints->dimension[1], memory ); - - hints->error = PSH_Err_Ok; - hints->memory = 0; - } - - - FT_LOCAL( FT_Error ) - ps_hints_init( PS_Hints hints, - FT_Memory memory ) - { - FT_MEM_ZERO( hints, sizeof ( *hints ) ); - hints->memory = memory; - return PSH_Err_Ok; - } - - - /* initialize a hints for a new session */ - static void - ps_hints_open( PS_Hints hints, - PS_Hint_Type hint_type ) - { - switch ( hint_type ) - { - case PS_HINT_TYPE_1: - case PS_HINT_TYPE_2: - hints->error = PSH_Err_Ok; - hints->hint_type = hint_type; - - ps_dimension_init( &hints->dimension[0] ); - ps_dimension_init( &hints->dimension[1] ); - break; - - default: - hints->error = PSH_Err_Invalid_Argument; - hints->hint_type = hint_type; - - FT_TRACE0(( "ps_hints_open: invalid charstring type\n" )); - break; - } - } - - - /* add one or more stems to the current hints table */ - static void - ps_hints_stem( PS_Hints hints, - FT_Int dimension, - FT_UInt count, - FT_Long* stems ) - { - if ( !hints->error ) - { - /* limit "dimension" to 0..1 */ - if ( dimension < 0 || dimension > 1 ) - { - FT_TRACE0(( "ps_hints_stem: invalid dimension (%d) used\n", - dimension )); - dimension = ( dimension != 0 ); - } - - /* record the stems in the current hints/masks table */ - switch ( hints->hint_type ) - { - case PS_HINT_TYPE_1: /* Type 1 "hstem" or "vstem" operator */ - case PS_HINT_TYPE_2: /* Type 2 "hstem" or "vstem" operator */ - { - PS_Dimension dim = &hints->dimension[dimension]; - - - for ( ; count > 0; count--, stems += 2 ) - { - FT_Error error; - FT_Memory memory = hints->memory; - - - error = ps_dimension_add_t1stem( - dim, (FT_Int)stems[0], (FT_Int)stems[1], - memory, NULL ); - if ( error ) - { - FT_ERROR(( "ps_hints_stem: could not add stem" - " (%d,%d) to hints table\n", stems[0], stems[1] )); - - hints->error = error; - return; - } - } - break; - } - - default: - FT_TRACE0(( "ps_hints_stem: called with invalid hint type (%d)\n", - hints->hint_type )); - break; - } - } - } - - - /* add one Type1 counter stem to the current hints table */ - static void - ps_hints_t1stem3( PS_Hints hints, - FT_Int dimension, - FT_Fixed* stems ) - { - FT_Error error = PSH_Err_Ok; - - - if ( !hints->error ) - { - PS_Dimension dim; - FT_Memory memory = hints->memory; - FT_Int count; - FT_Int idx[3]; - - - /* limit "dimension" to 0..1 */ - if ( dimension < 0 || dimension > 1 ) - { - FT_TRACE0(( "ps_hints_t1stem3: invalid dimension (%d) used\n", - dimension )); - dimension = ( dimension != 0 ); - } - - dim = &hints->dimension[dimension]; - - /* there must be 6 elements in the 'stem' array */ - if ( hints->hint_type == PS_HINT_TYPE_1 ) - { - /* add the three stems to our hints/masks table */ - for ( count = 0; count < 3; count++, stems += 2 ) - { - error = ps_dimension_add_t1stem( dim, - (FT_Int)FIXED_TO_INT( stems[0] ), - (FT_Int)FIXED_TO_INT( stems[1] ), - memory, &idx[count] ); - if ( error ) - goto Fail; - } - - /* now, add the hints to the counters table */ - error = ps_dimension_add_counter( dim, idx[0], idx[1], idx[2], - memory ); - if ( error ) - goto Fail; - } - else - { - FT_ERROR(( "ps_hints_t1stem3: called with invalid hint type\n" )); - error = PSH_Err_Invalid_Argument; - goto Fail; - } - } - - return; - - Fail: - FT_ERROR(( "ps_hints_t1stem3: could not add counter stems to table\n" )); - hints->error = error; - } - - - /* reset hints (only with Type 1 hints) */ - static void - ps_hints_t1reset( PS_Hints hints, - FT_UInt end_point ) - { - FT_Error error = PSH_Err_Ok; - - - if ( !hints->error ) - { - FT_Memory memory = hints->memory; - - - if ( hints->hint_type == PS_HINT_TYPE_1 ) - { - error = ps_dimension_reset_mask( &hints->dimension[0], - end_point, memory ); - if ( error ) - goto Fail; - - error = ps_dimension_reset_mask( &hints->dimension[1], - end_point, memory ); - if ( error ) - goto Fail; - } - else - { - /* invalid hint type */ - error = PSH_Err_Invalid_Argument; - goto Fail; - } - } - return; - - Fail: - hints->error = error; - } - - - /* Type2 "hintmask" operator, add a new hintmask to each direction */ - static void - ps_hints_t2mask( PS_Hints hints, - FT_UInt end_point, - FT_UInt bit_count, - const FT_Byte* bytes ) - { - FT_Error error; - - - if ( !hints->error ) - { - PS_Dimension dim = hints->dimension; - FT_Memory memory = hints->memory; - FT_UInt count1 = dim[0].hints.num_hints; - FT_UInt count2 = dim[1].hints.num_hints; - - - /* check bit count; must be equal to current total hint count */ - if ( bit_count != count1 + count2 ) - { - FT_TRACE0(( "ps_hints_t2mask:" - " called with invalid bitcount %d (instead of %d)\n", - bit_count, count1 + count2 )); - - /* simply ignore the operator */ - return; - } - - /* set-up new horizontal and vertical hint mask now */ - error = ps_dimension_set_mask_bits( &dim[0], bytes, count2, count1, - end_point, memory ); - if ( error ) - goto Fail; - - error = ps_dimension_set_mask_bits( &dim[1], bytes, 0, count2, - end_point, memory ); - if ( error ) - goto Fail; - } - return; - - Fail: - hints->error = error; - } - - - static void - ps_hints_t2counter( PS_Hints hints, - FT_UInt bit_count, - const FT_Byte* bytes ) - { - FT_Error error; - - - if ( !hints->error ) - { - PS_Dimension dim = hints->dimension; - FT_Memory memory = hints->memory; - FT_UInt count1 = dim[0].hints.num_hints; - FT_UInt count2 = dim[1].hints.num_hints; - - - /* check bit count, must be equal to current total hint count */ - if ( bit_count != count1 + count2 ) - { - FT_TRACE0(( "ps_hints_t2counter:" - " called with invalid bitcount %d (instead of %d)\n", - bit_count, count1 + count2 )); - - /* simply ignore the operator */ - return; - } - - /* set-up new horizontal and vertical hint mask now */ - error = ps_dimension_set_mask_bits( &dim[0], bytes, 0, count1, - 0, memory ); - if ( error ) - goto Fail; - - error = ps_dimension_set_mask_bits( &dim[1], bytes, count1, count2, - 0, memory ); - if ( error ) - goto Fail; - } - return; - - Fail: - hints->error = error; - } - - - /* end recording session */ - static FT_Error - ps_hints_close( PS_Hints hints, - FT_UInt end_point ) - { - FT_Error error; - - - error = hints->error; - if ( !error ) - { - FT_Memory memory = hints->memory; - PS_Dimension dim = hints->dimension; - - - error = ps_dimension_end( &dim[0], end_point, memory ); - if ( !error ) - { - error = ps_dimension_end( &dim[1], end_point, memory ); - } - } - -#ifdef DEBUG_HINTER - if ( !error ) - ps_debug_hints = hints; -#endif - return error; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** TYPE 1 HINTS RECORDING INTERFACE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static void - t1_hints_open( T1_Hints hints ) - { - ps_hints_open( (PS_Hints)hints, PS_HINT_TYPE_1 ); - } - - static void - t1_hints_stem( T1_Hints hints, - FT_Int dimension, - FT_Fixed* coords ) - { - FT_Pos stems[2]; - - - stems[0] = FIXED_TO_INT( coords[0] ); - stems[1] = FIXED_TO_INT( coords[1] ); - - ps_hints_stem( (PS_Hints)hints, dimension, 1, stems ); - } - - - FT_LOCAL_DEF( void ) - t1_hints_funcs_init( T1_Hints_FuncsRec* funcs ) - { - FT_MEM_ZERO( (char*)funcs, sizeof ( *funcs ) ); - - funcs->open = (T1_Hints_OpenFunc) t1_hints_open; - funcs->close = (T1_Hints_CloseFunc) ps_hints_close; - funcs->stem = (T1_Hints_SetStemFunc) t1_hints_stem; - funcs->stem3 = (T1_Hints_SetStem3Func)ps_hints_t1stem3; - funcs->reset = (T1_Hints_ResetFunc) ps_hints_t1reset; - funcs->apply = (T1_Hints_ApplyFunc) ps_hints_apply; - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** TYPE 2 HINTS RECORDING INTERFACE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - static void - t2_hints_open( T2_Hints hints ) - { - ps_hints_open( (PS_Hints)hints, PS_HINT_TYPE_2 ); - } - - - static void - t2_hints_stems( T2_Hints hints, - FT_Int dimension, - FT_Int count, - FT_Fixed* coords ) - { - FT_Pos stems[32], y, n; - FT_Int total = count; - - - y = 0; - while ( total > 0 ) - { - /* determine number of stems to write */ - count = total; - if ( count > 16 ) - count = 16; - - /* compute integer stem positions in font units */ - for ( n = 0; n < count * 2; n++ ) - { - y += coords[n]; - stems[n] = FIXED_TO_INT( y ); - } - - /* compute lengths */ - for ( n = 0; n < count * 2; n += 2 ) - stems[n + 1] = stems[n + 1] - stems[n]; - - /* add them to the current dimension */ - ps_hints_stem( (PS_Hints)hints, dimension, count, stems ); - - total -= count; - } - } - - - FT_LOCAL_DEF( void ) - t2_hints_funcs_init( T2_Hints_FuncsRec* funcs ) - { - FT_MEM_ZERO( funcs, sizeof ( *funcs ) ); - - funcs->open = (T2_Hints_OpenFunc) t2_hints_open; - funcs->close = (T2_Hints_CloseFunc) ps_hints_close; - funcs->stems = (T2_Hints_StemsFunc) t2_hints_stems; - funcs->hintmask= (T2_Hints_MaskFunc) ps_hints_t2mask; - funcs->counter = (T2_Hints_CounterFunc)ps_hints_t2counter; - funcs->apply = (T2_Hints_ApplyFunc) ps_hints_apply; - } - - -/* END */