ref: d0e6ad636f6758eb0e06e88088d2970737df6a59
dir: /src/pshinter/pshrec.c/
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include "pshrec.h"
#include "pshalgo.h"
#ifdef DEBUG_HINTER
extern PS_Hints ps_debug_hints = 0;
extern int ps_debug_no_horz_hints = 0;
extern 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 )
{
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 = 0;
if ( new_max > old_max )
{
/* try to grow the table */
new_max = ( new_max + 7 ) & -8;
if ( !REALLOC_ARRAY( table->hints, old_max, new_max, PS_HintRec ) )
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 = 0;
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 )
{
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 = 0;
if ( new_max > old_max )
{
new_max = ( new_max + 7 ) & -8;
if ( !REALLOC_ARRAY( mask->bytes, old_max, new_max, FT_Byte ) )
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 index )
{
if ( (FT_UInt)index >= mask->num_bits )
return 0;
return mask->bytes[index >> 3] & (0x80 >> (index & 7));
}
/* clear a given bit */
static void
ps_mask_clear_bit( PS_Mask mask,
FT_Int index )
{
FT_Byte* p;
if ( (FT_UInt)index >= mask->num_bits )
return;
p = mask->bytes + (index >> 3);
p[0] = (FT_Byte)( p[0] & ~(0x80 >> (index & 7)) );
}
/* set a given bit, eventually grow the mask */
static FT_Error
ps_mask_set_bit( PS_Mask mask,
FT_Int index,
FT_Memory memory )
{
FT_Error error = 0;
FT_Byte* p;
if ( index < 0 )
goto Exit;
if ( (FT_UInt)index >= mask->num_bits )
{
error = ps_mask_ensure( mask, index+1, memory );
if (error) goto Exit;
mask->num_bits = index+1;
}
p = mask->bytes + (index >> 3);
p[0] = (FT_Byte)( p[0] | (0x80 >> (index & 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 );
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 = 0;
if ( new_max > old_max )
{
new_max = (new_max+7) & -8;
if ( !REALLOC_ARRAY( table->masks, old_max, new_max, PS_MaskRec ) )
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 = 0;
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 = 0;
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,
FT_Byte* source,
FT_UInt bit_pos,
FT_UInt bit_count,
FT_Memory memory )
{
FT_Error error = 0;
PS_Mask mask;
/* allocate new mask, and grow it to "bit_count" bits */
error = ps_mask_table_alloc( 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 = 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 wether 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 = 0;
/* swap index1 and index2 so that index1 < index2 */
if ( index1 > index2 )
{
temp = index1;
index1 = index2;
index2 = index1;
}
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 (union) 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;
memmove( mask2, mask2+1, delta*sizeof(PS_MaskRec) );
mask2[delta] = dummy;
}
table->num_masks--;
}
else
FT_ERROR(( "%s: 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 = 0;
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 );
}
/* initialise 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 index,
FT_Memory memory )
{
PS_Mask mask;
FT_Error error = 0;
/* get last hint mask */
error = ps_mask_table_last( &dim->masks, memory, &mask );
if (error) goto Exit;
error = ps_mask_set_bit( mask, index, 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 = 0;
/* 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, (FT_Byte*)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 = 0;
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 index;
FT_UInt max = dim->hints.num_hints;
PS_Hint hint = dim->hints.hints;
for ( index = 0; index < max; index++, hint++ )
{
if ( hint->pos == pos && hint->len == len )
break;
}
/* we need to create a new hint in the table */
if ( index >= 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, index, memory );
if (error) goto Exit;
if ( aindex )
*aindex = (FT_Int)index;
}
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 = 0;
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;
}
/* creat 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 = 0;
hints->memory = 0;
}
FT_LOCAL FT_Error
ps_hints_init( PS_Hints hints,
FT_Memory memory )
{
memset( hints, 0, sizeof(*hints) );
hints->memory = memory;
return 0;
}
/* initialise 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 = 0;
hints->hint_type = hint_type;
ps_dimension_init( &hints->dimension[0] );
ps_dimension_init( &hints->dimension[1] );
}
break;
default:
hints->error = FT_Err_Invalid_Argument;
hints->hint_type = hint_type;
FT_ERROR(( "%s.init: invalid charstring type !!\n", "t1fitter.hints" ));
}
}
/* 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_ERROR(( "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, stems[0], stems[1],
memory, NULL );
if (error)
{
FT_ERROR(( "t1f.hints.stem: could not add stem"
" (%d,%d) to hints table\n", stems[0], stems[1] ));
hints->error = error;
return;
};
}
}
break;
default:
FT_ERROR(( "t1f.hints.stem: called with invalid hint type (%d)\n",
hints->hint_type ));
;
}
}
}
/* add one Type1 counter stem to the current hints table */
static void
ps_hints_t1stem3( PS_Hints hints,
FT_Int dimension,
FT_Long* stems )
{
FT_Error error = 0;
if (!hints->error)
{
PS_Dimension dim;
FT_Memory memory = hints->memory;
FT_Int count;
FT_Int index[3];
/* limit "dimension" to 0..1 */
if ( dimension < 0 || dimension > 1 )
{
FT_ERROR(( "t1f.hints.stem: 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, stems[0], stems[1],
memory, &index[count] );
if (error) goto Fail;
}
/* now, add the hints to the counters table */
error = ps_dimension_add_counter( dim, index[0], index[1],
index[2], memory );
if (error) goto Fail;
}
else
{
FT_ERROR(( "t1f.hints.stem3: called with invalid hint type !!\n" ));
error = FT_Err_Invalid_Argument;
goto Fail;
}
}
return;
Fail:
FT_ERROR(( "t1f.hints.stem3: 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 = 0;
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 = FT_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 )
{
error = FT_Err_Invalid_Argument;
FT_ERROR(( "%s: called with invalid bitcount %d (instead of %d)\n",
bit_count, count1+count2 ));
goto Fail;
}
/* set-up new horizontal and vertical hint mask now */
error = ps_dimension_set_mask_bits( &dim[0], bytes, 0, count1,
end_point, memory );
if (error) goto Fail;
error = ps_dimension_set_mask_bits( &dim[1], bytes, count1, 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 )
{
error = FT_Err_Invalid_Argument;
FT_ERROR(( "%s: called with invalid bitcount %d (instead of %d)\n",
bit_count, count1+count2 ));
goto Fail;
}
/* 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_Error 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_Long* coords )
{
ps_hints_stem( (PS_Hints)hints, dimension, 1, coords );
}
FT_LOCAL_DEF void
t1_hints_funcs_init( T1_Hints_FuncsRec* funcs )
{
memset( (char*)funcs, 0, 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_FUNC;
}
/***********************************************************************/
/***********************************************************************/
/***** *****/
/***** 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_Long stems[32], n, total = count;
while (total > 0)
{
/* determine number of stems to write */
count = total;
if ( count > 32 )
count = 32;
/* compute integer stem position in font units */
for ( n = 0; n < count*2; n++ )
stems[n] = (coords[n] + 0x8000) >> 16;
/* add them to the current dimension */
ps_hints_stem( (PS_Hints)hints, dimension, count, stems );
total -= (count >> 1);
}
}
FT_LOCAL_DEF void
t2_hints_funcs_init( T2_Hints_FuncsRec* funcs )
{
memset( funcs, 0, 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_FUNC;
}