ref: 877ff67887184a1f8edbccafc39c2ee3a5d88aa3
dir: /src/pfr/pfrload.c/
/***************************************************************************/
/* */
/* pfrload.c */
/* */
/* FreeType PFR loader (body). */
/* */
/* Copyright 2002 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 "pfrload.h"
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include "pfrerror.h"
#undef FT_COMPONENT
#define FT_COMPONENT trace_pfr
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** EXTRA ITEMS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_LOCAL_DEF( FT_Error )
pfr_extra_items_skip( FT_Byte* *pp,
FT_Byte* limit )
{
return pfr_extra_items_parse( pp, limit, NULL, NULL );
}
FT_LOCAL_DEF( FT_Error )
pfr_extra_items_parse( FT_Byte* *pp,
FT_Byte* limit,
PFR_ExtraItem item_list,
FT_Pointer item_data )
{
FT_Error error = 0;
FT_Byte* p = *pp;
FT_UInt num_items, item_type, item_size;
PFR_CHECK( 1 );
num_items = PFR_NEXT_BYTE( p );
for ( ; num_items > 0; num_items-- )
{
PFR_CHECK( 2 );
item_size = PFR_NEXT_BYTE( p );
item_type = PFR_NEXT_BYTE( p );
PFR_CHECK( item_size );
if ( item_list )
{
PFR_ExtraItem extra = item_list;
for ( extra = item_list; extra->parser != NULL; extra++ )
{
if ( extra->type == item_type )
{
error = extra->parser( p, p + item_size, item_data );
if ( error ) goto Exit;
break;
}
}
}
p += item_size;
}
Exit:
*pp = p;
return error;
Too_Short:
FT_ERROR(( "pfr_extra_items_parse: invalid extra items table\n" ));
error = PFR_Err_Invalid_Table;
goto Exit;
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** PFR HEADER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
static const FT_Frame_Field pfr_header_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE PFR_HeaderRec
FT_FRAME_START( 58 ),
FT_FRAME_ULONG ( signature ),
FT_FRAME_USHORT( version ),
FT_FRAME_USHORT( signature2 ),
FT_FRAME_USHORT( header_size ),
FT_FRAME_USHORT( log_dir_size ),
FT_FRAME_USHORT( log_dir_offset ),
FT_FRAME_USHORT( log_font_max_size ),
FT_FRAME_UOFF3 ( log_font_section_size ),
FT_FRAME_UOFF3 ( log_font_section_offset ),
FT_FRAME_USHORT( phy_font_max_size ),
FT_FRAME_UOFF3 ( phy_font_section_size ),
FT_FRAME_UOFF3 ( phy_font_section_offset ),
FT_FRAME_USHORT( gps_max_size ),
FT_FRAME_UOFF3 ( gps_section_size ),
FT_FRAME_UOFF3 ( gps_section_offset ),
FT_FRAME_BYTE ( max_blue_values ),
FT_FRAME_BYTE ( max_x_orus ),
FT_FRAME_BYTE ( max_y_orus ),
FT_FRAME_BYTE ( phy_font_max_size_high ),
FT_FRAME_BYTE ( color_flags ),
FT_FRAME_UOFF3 ( bct_max_size ),
FT_FRAME_UOFF3 ( bct_set_max_size ),
FT_FRAME_UOFF3 ( phy_bct_set_max_size ),
FT_FRAME_USHORT( num_phy_fonts ),
FT_FRAME_BYTE ( max_vert_stem_snap ),
FT_FRAME_BYTE ( max_horz_stem_snap ),
FT_FRAME_USHORT( max_chars ),
FT_FRAME_END
};
FT_LOCAL_DEF( FT_Error )
pfr_header_load( PFR_Header header,
FT_Stream stream )
{
FT_Error error;
/* read header directly */
if ( !FT_STREAM_SEEK( 0 ) &&
!FT_STREAM_READ_FIELDS( pfr_header_fields, header ) )
{
/* make a few adjustments to the header */
header->phy_font_max_size +=
(FT_UInt32)header->phy_font_max_size_high << 16;
}
return error;
}
FT_LOCAL_DEF( FT_Bool )
pfr_header_check( PFR_Header header )
{
FT_Bool result = 1;
/* check signature and header size */
if ( header->signature != 0x50465230L || /* "PFR0" */
header->version > 4 ||
header->header_size < 58 ||
header->signature2 != 0x0d0a ) /* CR/LF */
{
result = 0;
}
return result;
}
/***********************************************************************/
/***********************************************************************/
/***** *****/
/***** PFR LOGICAL FONTS *****/
/***** *****/
/***********************************************************************/
/***********************************************************************/
FT_LOCAL_DEF( FT_Error )
pfr_log_font_count( FT_Stream stream,
FT_UInt32 section_offset,
FT_UInt *acount )
{
FT_Error error;
FT_UInt count;
FT_UInt result = 0;
if ( FT_STREAM_SEEK( section_offset ) || FT_READ_USHORT( count ) )
goto Exit;
result = count;
Exit:
*acount = result;
return error;
}
FT_LOCAL_DEF( FT_Error )
pfr_log_font_load( PFR_LogFont log_font,
FT_Stream stream,
FT_UInt index,
FT_UInt32 section_offset,
FT_Bool size_increment )
{
FT_UInt num_log_fonts;
FT_UInt flags;
FT_UInt32 offset;
FT_UInt32 size;
FT_Error error;
if ( FT_STREAM_SEEK( section_offset ) ||
FT_READ_USHORT( num_log_fonts ) )
goto Exit;
if ( index >= num_log_fonts )
return PFR_Err_Invalid_Argument;
if ( FT_STREAM_SKIP( index * 5 ) ||
FT_READ_USHORT( size ) ||
FT_READ_UOFF3 ( offset ) )
goto Exit;
/* save logical font size and offset */
log_font->size = size;
log_font->offset = offset;
/* now, check the rest of the table before loading it */
{
FT_Byte* p;
FT_Byte* limit;
FT_UInt local;
if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( size ) )
goto Exit;
p = stream->cursor;
limit = p + size;
PFR_CHECK(13);
log_font->matrix[0] = PFR_NEXT_LONG( p );
log_font->matrix[1] = PFR_NEXT_LONG( p );
log_font->matrix[2] = PFR_NEXT_LONG( p );
log_font->matrix[3] = PFR_NEXT_LONG( p );
flags = PFR_NEXT_BYTE( p );
local = 0;
if ( flags & PFR_LOG_STROKE )
{
local++;
if ( flags & PFR_LOG_2BYTE_STROKE )
local++;
if ( (flags & PFR_LINE_JOIN_MASK) == PFR_LINE_JOIN_MITER )
local += 3;
}
if ( flags & PFR_LOG_BOLD )
{
local++;
if ( flags & PFR_LOG_2BYTE_BOLD )
local++;
}
PFR_CHECK( local );
if ( flags & PFR_LOG_STROKE )
{
log_font->stroke_thickness = ( flags & PFR_LOG_2BYTE_STROKE )
? PFR_NEXT_SHORT( p )
: PFR_NEXT_BYTE( p );
if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER )
log_font->miter_limit = PFR_NEXT_LONG( p );
}
if ( flags & PFR_LOG_BOLD )
{
log_font->bold_thickness = ( flags & PFR_LOG_2BYTE_BOLD )
? PFR_NEXT_SHORT( p )
: PFR_NEXT_BYTE( p );
}
if ( flags & PFR_LOG_EXTRA_ITEMS )
{
error = pfr_extra_items_skip( &p, limit );
if (error) goto Fail;
}
PFR_CHECK(5);
log_font->phys_size = PFR_NEXT_USHORT( p );
log_font->phys_offset = PFR_NEXT_ULONG( p );
if ( size_increment )
{
PFR_CHECK( 1 );
log_font->phys_size += (FT_UInt32)PFR_NEXT_BYTE( p ) << 16;
}
}
Fail:
FT_FRAME_EXIT();
Exit:
return error;
Too_Short:
FT_ERROR(( "pfr_log_font_load: invalid logical font table\n" ));
error = PFR_Err_Invalid_Table;
goto Fail;
}
/***********************************************************************/
/***********************************************************************/
/***** *****/
/***** PFR PHYSICAL FONTS *****/
/***** *****/
/***********************************************************************/
/***********************************************************************/
/* load bitmap strikes lists */
FT_CALLBACK_DEF( FT_Error )
pfr_extra_item_load_bitmap_info( FT_Byte* p,
FT_Byte* limit,
PFR_PhyFont phy_font )
{
FT_Memory memory = phy_font->memory;
PFR_Strike strike;
FT_UInt flags0;
FT_UInt n, count, size1;
FT_Error error = 0;
PFR_CHECK( 5 );
p += 3; /* skip bctSize */
flags0 = PFR_NEXT_BYTE( p );
count = PFR_NEXT_BYTE( p );
/* re-allocate when needed */
if ( phy_font->num_strikes + count > phy_font->max_strikes )
{
FT_UInt new_max = (phy_font->num_strikes + count + 3) & -4;
if ( FT_RENEW_ARRAY( phy_font->strikes,
phy_font->num_strikes,
new_max ) )
goto Exit;
phy_font->max_strikes = new_max;
}
size1 = 1 + 1 + 1 + 2 + 2 + 1;
if ( flags0 & PFR_STRIKE_2BYTE_XPPM )
size1++;
if ( flags0 & PFR_STRIKE_2BYTE_YPPM )
size1++;
if ( flags0 & PFR_STRIKE_3BYTE_SIZE )
size1++;
if ( flags0 & PFR_STRIKE_3BYTE_OFFSET )
size1++;
if ( flags0 & PFR_STRIKE_2BYTE_COUNT )
size1++;
strike = phy_font->strikes + phy_font->num_strikes;
PFR_CHECK( count * size1 );
for ( n = 0; n < count; n++, strike++ )
{
strike->x_ppm = ( flags0 & PFR_STRIKE_2BYTE_XPPM )
? PFR_NEXT_USHORT( p )
: PFR_NEXT_BYTE( p );
strike->y_ppm = ( flags0 & PFR_STRIKE_2BYTE_YPPM )
? PFR_NEXT_USHORT( p )
: PFR_NEXT_BYTE( p );
strike->flags = PFR_NEXT_BYTE( p );
strike->bct_size = ( flags0 & PFR_STRIKE_3BYTE_SIZE )
? PFR_NEXT_ULONG( p )
: PFR_NEXT_USHORT( p );
strike->bct_offset = ( flags0 & PFR_STRIKE_3BYTE_OFFSET )
? PFR_NEXT_ULONG( p )
: PFR_NEXT_USHORT( p );
strike->num_bitmaps = ( flags0 & PFR_STRIKE_2BYTE_COUNT )
? PFR_NEXT_USHORT( p )
: PFR_NEXT_BYTE( p );
}
phy_font->num_strikes += count;
Exit:
return error;
Too_Short:
error = PFR_Err_Invalid_Table;
FT_ERROR(( "pfr_extra_item_load_bitmap_info: invalid bitmap info table\n" ));
goto Exit;
}
/* load font ID, i.e. name */
FT_CALLBACK_DEF( FT_Error )
pfr_extra_item_load_font_id( FT_Byte* p,
FT_Byte* limit,
PFR_PhyFont phy_font )
{
FT_Error error = 0;
FT_Memory memory = phy_font->memory;
FT_UInt len = (FT_UInt)( limit - p );
if ( phy_font->font_id != NULL )
goto Exit;
if ( FT_ALLOC( phy_font->font_id, len+1 ) )
goto Exit;
/* copy font ID name, and terminate it for safety */
FT_MEM_COPY( phy_font->font_id, p, len );
phy_font->font_id[len] = 0;
Exit:
return error;
}
/* load stem snap tables */
FT_CALLBACK_DEF( FT_Error )
pfr_extra_item_load_stem_snaps( FT_Byte* p,
FT_Byte* limit,
PFR_PhyFont phy_font )
{
FT_UInt count, num_vert, num_horz;
FT_Int* snaps;
FT_Error error = 0;
FT_Memory memory = phy_font->memory;
if ( phy_font->vertical.stem_snaps != NULL )
goto Exit;
PFR_CHECK( 1 );
count = PFR_NEXT_BYTE( p );
num_vert = count & 15;
num_horz = count >> 4;
count = num_vert + num_horz;
PFR_CHECK( count * 2 );
if ( FT_NEW_ARRAY( snaps, count ) )
goto Exit;
phy_font->vertical.stem_snaps = snaps;
phy_font->horizontal.stem_snaps = snaps + num_vert;
for ( ; count > 0; count--, snaps++ )
*snaps = FT_NEXT_SHORT( p );
Exit:
return error;
Too_Short:
error = PFR_Err_Invalid_Table;
FT_ERROR(( "pfr_exta_item_load_stem_snaps: invalid stem snaps table\n" ));
goto Exit;
}
static const PFR_ExtraItemRec pfr_phy_font_extra_items[] =
{
{ 1, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_bitmap_info },
{ 2, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_font_id },
{ 3, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_stem_snaps },
{ 0, NULL }
};
FT_LOCAL_DEF( void )
pfr_phy_font_done( PFR_PhyFont phy_font,
FT_Memory memory )
{
if ( phy_font->font_id )
FT_FREE( phy_font->font_id );
FT_FREE( phy_font->vertical.stem_snaps );
phy_font->vertical.num_stem_snaps = 0;
phy_font->horizontal.stem_snaps = NULL;
phy_font->horizontal.num_stem_snaps = 0;
FT_FREE( phy_font->strikes );
phy_font->num_strikes = 0;
phy_font->max_strikes = 0;
FT_FREE( phy_font->chars );
phy_font->num_chars = 0;
phy_font->chars_offset = 0;
}
FT_LOCAL_DEF( FT_Error )
pfr_phy_font_load( PFR_PhyFont phy_font,
FT_Stream stream,
FT_UInt32 offset,
FT_UInt32 size )
{
FT_Error error;
FT_Memory memory = stream->memory;
FT_UInt flags, num_aux;
FT_Byte* p;
FT_Byte* limit;
phy_font->memory = memory;
phy_font->offset = offset;
if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( size ) )
goto Exit;
p = stream->cursor;
limit = p + size;
PFR_CHECK( 15 );
phy_font->font_ref_number = PFR_NEXT_USHORT( p );
phy_font->outline_resolution = PFR_NEXT_USHORT( p );
phy_font->metrics_resolution = PFR_NEXT_USHORT( p );
phy_font->bbox.xMin = PFR_NEXT_SHORT( p );
phy_font->bbox.yMin = PFR_NEXT_SHORT( p );
phy_font->bbox.xMax = PFR_NEXT_SHORT( p );
phy_font->bbox.yMax = PFR_NEXT_SHORT( p );
phy_font->flags = flags = PFR_NEXT_BYTE( p );
/* get the standard advance for non-proprotional fonts */
if ( !(flags & PFR_PHY_PROPORTIONAL) )
{
PFR_CHECK( 2 );
phy_font->standard_advance = PFR_NEXT_SHORT( p );
}
/* load the extra items when present */
if ( flags & PFR_PHY_EXTRA_ITEMS )
{
error = pfr_extra_items_parse( &p, limit,
pfr_phy_font_extra_items, phy_font );
if ( error )
goto Fail;
}
/* skip the aux bytes */
PFR_CHECK( 3 );
num_aux = PFR_NEXT_ULONG( p );
PFR_CHECK( num_aux );
p += num_aux;
/* read the blue values */
{
FT_UInt n, count;
PFR_CHECK( 1 );
phy_font->num_blue_values = count = PFR_NEXT_BYTE( p );
PFR_CHECK( count * 2 );
if ( FT_NEW_ARRAY( phy_font->blue_values, count ) )
goto Fail;
for ( n = 0; n < count; n++ )
phy_font->blue_values[n] = PFR_NEXT_SHORT( p );
}
PFR_CHECK( 8 );
phy_font->blue_fuzz = PFR_NEXT_BYTE( p );
phy_font->blue_scale = PFR_NEXT_BYTE( p );
phy_font->vertical.standard = PFR_NEXT_USHORT( p );
phy_font->horizontal.standard = PFR_NEXT_USHORT( p );
/* read the character descriptors */
{
FT_UInt n, count, Size;
phy_font->num_chars = count = PFR_NEXT_USHORT( p );
phy_font->chars_offset = offset + ( p - stream->cursor );
if ( FT_NEW_ARRAY( phy_font->chars, count ) )
goto Fail;
Size = 1 + 1 + 2;
if ( flags & PFR_PHY_2BYTE_CHARCODE )
Size += 1;
if ( flags & PFR_PHY_PROPORTIONAL )
Size += 2;
if ( flags & PFR_PHY_ASCII_CODE )
Size += 1;
if ( flags & PFR_PHY_2BYTE_GPS_SIZE )
Size += 1;
if ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
Size += 1;
PFR_CHECK( count * Size );
for ( n = 0; n < count; n++ )
{
PFR_Char cur = &phy_font->chars[n];
cur->char_code = ( flags & PFR_PHY_2BYTE_CHARCODE )
? PFR_NEXT_USHORT( p )
: PFR_NEXT_BYTE( p );
cur->advance = ( flags & PFR_PHY_PROPORTIONAL )
? PFR_NEXT_SHORT( p )
: phy_font->standard_advance;
#if 0
cur->ascii = ( flags & PFR_PHY_ASCII_CODE )
? PFR_NEXT_BYTE( p )
: 0;
#else
if ( flags & PFR_PHY_ASCII_CODE )
p += 1;
#endif
cur->gps_size = ( flags & PFR_PHY_2BYTE_GPS_SIZE )
? PFR_NEXT_USHORT( p )
: PFR_NEXT_BYTE( p );
cur->gps_offset = ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
? PFR_NEXT_ULONG( p )
: PFR_NEXT_USHORT( p );
}
}
/* that's it !! */
Fail:
FT_FRAME_EXIT();
Exit:
return error;
Too_Short:
error = PFR_Err_Invalid_Table;
FT_ERROR(( "pfr_phy_font_load: invalid physical font table\n" ));
goto Fail;
}
/* END */