ref: a724dcf5c36aa426719c1c12b88eab94a3b53f25
dir: /src/pcf/pcfdrivr.c/
/* pcfdrivr.c
FreeType font driver for pcf files
Copyright (C) 2000-2004, 2006-2011, 2013, 2014 by
Francesco Zappa Nardelli
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_OBJECTS_H
#include FT_GZIP_H
#include FT_LZW_H
#include FT_BZIP2_H
#include FT_ERRORS_H
#include FT_BDF_H
#include FT_TRUETYPE_IDS_H
#include "pcf.h"
#include "pcfdrivr.h"
#include "pcfread.h"
#include "pcferror.h"
#include "pcfutil.h"
#undef FT_COMPONENT
#define FT_COMPONENT trace_pcfread
#include FT_SERVICE_BDF_H
#include FT_SERVICE_FONT_FORMAT_H
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_pcfdriver
typedef struct PCF_CMapRec_
{
FT_CMapRec root;
FT_ULong num_encodings;
PCF_Encoding encodings;
} PCF_CMapRec, *PCF_CMap;
FT_CALLBACK_DEF( FT_Error )
pcf_cmap_init( FT_CMap pcfcmap, /* PCF_CMap */
FT_Pointer init_data )
{
PCF_CMap cmap = (PCF_CMap)pcfcmap;
PCF_Face face = (PCF_Face)FT_CMAP_FACE( pcfcmap );
FT_UNUSED( init_data );
cmap->num_encodings = face->nencodings;
cmap->encodings = face->encodings;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( void )
pcf_cmap_done( FT_CMap pcfcmap ) /* PCF_CMap */
{
PCF_CMap cmap = (PCF_CMap)pcfcmap;
cmap->encodings = NULL;
cmap->num_encodings = 0;
}
FT_CALLBACK_DEF( FT_UInt )
pcf_cmap_char_index( FT_CMap pcfcmap, /* PCF_CMap */
FT_UInt32 charcode )
{
PCF_CMap cmap = (PCF_CMap)pcfcmap;
PCF_Encoding encodings = cmap->encodings;
FT_ULong min, max, mid;
FT_UInt result = 0;
min = 0;
max = cmap->num_encodings;
while ( min < max )
{
FT_ULong code;
mid = ( min + max ) >> 1;
code = (FT_ULong)encodings[mid].enc;
if ( charcode == code )
{
result = encodings[mid].glyph + 1;
break;
}
if ( charcode < code )
max = mid;
else
min = mid + 1;
}
return result;
}
FT_CALLBACK_DEF( FT_UInt )
pcf_cmap_char_next( FT_CMap pcfcmap, /* PCF_CMap */
FT_UInt32 *acharcode )
{
PCF_CMap cmap = (PCF_CMap)pcfcmap;
PCF_Encoding encodings = cmap->encodings;
FT_ULong min, max, mid;
FT_ULong charcode = *acharcode + 1;
FT_UInt result = 0;
min = 0;
max = cmap->num_encodings;
while ( min < max )
{
FT_ULong code;
mid = ( min + max ) >> 1;
code = (FT_ULong)encodings[mid].enc;
if ( charcode == code )
{
result = encodings[mid].glyph + 1;
goto Exit;
}
if ( charcode < code )
max = mid;
else
min = mid + 1;
}
charcode = 0;
if ( min < cmap->num_encodings )
{
charcode = (FT_ULong)encodings[min].enc;
result = encodings[min].glyph + 1;
}
Exit:
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "pcf_cmap_char_next: charcode 0x%x > 32bit API" ));
*acharcode = 0;
/* XXX: result should be changed to indicate an overflow error */
}
else
*acharcode = (FT_UInt32)charcode;
return result;
}
static
const FT_CMap_ClassRec pcf_cmap_class =
{
sizeof ( PCF_CMapRec ),
pcf_cmap_init,
pcf_cmap_done,
pcf_cmap_char_index,
pcf_cmap_char_next,
NULL, NULL, NULL, NULL, NULL
};
FT_CALLBACK_DEF( void )
PCF_Face_Done( FT_Face pcfface ) /* PCF_Face */
{
PCF_Face face = (PCF_Face)pcfface;
FT_Memory memory;
if ( !face )
return;
memory = FT_FACE_MEMORY( face );
FT_FREE( face->encodings );
FT_FREE( face->metrics );
/* free properties */
if ( face->properties )
{
FT_Int i;
for ( i = 0; i < face->nprops; i++ )
{
PCF_Property prop = &face->properties[i];
if ( prop )
{
FT_FREE( prop->name );
if ( prop->isString )
FT_FREE( prop->value.atom );
}
}
FT_FREE( face->properties );
}
FT_FREE( face->toc.tables );
FT_FREE( pcfface->family_name );
FT_FREE( pcfface->style_name );
FT_FREE( pcfface->available_sizes );
FT_FREE( face->charset_encoding );
FT_FREE( face->charset_registry );
/* close compressed stream if any */
if ( pcfface->stream == &face->comp_stream )
{
FT_Stream_Close( &face->comp_stream );
pcfface->stream = face->comp_source;
}
}
FT_CALLBACK_DEF( FT_Error )
PCF_Face_Init( FT_Stream stream,
FT_Face pcfface, /* PCF_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
PCF_Face face = (PCF_Face)pcfface;
FT_Error error;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_TRACE2(( "PCF driver\n" ));
error = pcf_load_font( stream, face );
if ( error )
{
PCF_Face_Done( pcfface );
#if defined( FT_CONFIG_OPTION_USE_ZLIB ) || \
defined( FT_CONFIG_OPTION_USE_LZW ) || \
defined( FT_CONFIG_OPTION_USE_BZIP2 )
#ifdef FT_CONFIG_OPTION_USE_ZLIB
{
FT_Error error2;
/* this didn't work, try gzip support! */
error2 = FT_Stream_OpenGzip( &face->comp_stream, stream );
if ( FT_ERR_EQ( error2, Unimplemented_Feature ) )
goto Fail;
error = error2;
}
#endif /* FT_CONFIG_OPTION_USE_ZLIB */
#ifdef FT_CONFIG_OPTION_USE_LZW
if ( error )
{
FT_Error error3;
/* this didn't work, try LZW support! */
error3 = FT_Stream_OpenLZW( &face->comp_stream, stream );
if ( FT_ERR_EQ( error3, Unimplemented_Feature ) )
goto Fail;
error = error3;
}
#endif /* FT_CONFIG_OPTION_USE_LZW */
#ifdef FT_CONFIG_OPTION_USE_BZIP2
if ( error )
{
FT_Error error4;
/* this didn't work, try Bzip2 support! */
error4 = FT_Stream_OpenBzip2( &face->comp_stream, stream );
if ( FT_ERR_EQ( error4, Unimplemented_Feature ) )
goto Fail;
error = error4;
}
#endif /* FT_CONFIG_OPTION_USE_BZIP2 */
if ( error )
goto Fail;
face->comp_source = stream;
pcfface->stream = &face->comp_stream;
stream = pcfface->stream;
error = pcf_load_font( stream, face );
if ( error )
goto Fail;
#else /* !(FT_CONFIG_OPTION_USE_ZLIB ||
FT_CONFIG_OPTION_USE_LZW ||
FT_CONFIG_OPTION_USE_BZIP2) */
goto Fail;
#endif
}
/* PCF cannot have multiple faces in a single font file.
* XXX: A non-zero face_index is already an invalid argument, but
* Type1, Type42 drivers have a convention to return
* an invalid argument error when the font could be
* opened by the specified driver.
*/
if ( face_index > 0 && ( face_index & 0xFFFF ) > 0 )
{
FT_ERROR(( "PCF_Face_Init: invalid face index\n" ));
PCF_Face_Done( pcfface );
return FT_THROW( Invalid_Argument );
}
/* set up charmap */
{
FT_String *charset_registry = face->charset_registry;
FT_String *charset_encoding = face->charset_encoding;
FT_Bool unicode_charmap = 0;
if ( charset_registry && charset_encoding )
{
char* s = charset_registry;
/* Uh, oh, compare first letters manually to avoid dependency
on locales. */
if ( ( s[0] == 'i' || s[0] == 'I' ) &&
( s[1] == 's' || s[1] == 'S' ) &&
( s[2] == 'o' || s[2] == 'O' ) )
{
s += 3;
if ( !ft_strcmp( s, "10646" ) ||
( !ft_strcmp( s, "8859" ) &&
!ft_strcmp( face->charset_encoding, "1" ) ) )
unicode_charmap = 1;
}
}
{
FT_CharMapRec charmap;
charmap.face = FT_FACE( face );
charmap.encoding = FT_ENCODING_NONE;
/* initial platform/encoding should indicate unset status? */
charmap.platform_id = TT_PLATFORM_APPLE_UNICODE;
charmap.encoding_id = TT_APPLE_ID_DEFAULT;
if ( unicode_charmap )
{
charmap.encoding = FT_ENCODING_UNICODE;
charmap.platform_id = TT_PLATFORM_MICROSOFT;
charmap.encoding_id = TT_MS_ID_UNICODE_CS;
}
error = FT_CMap_New( &pcf_cmap_class, NULL, &charmap, NULL );
#if 0
/* Select default charmap */
if ( pcfface->num_charmaps )
pcfface->charmap = pcfface->charmaps[0];
#endif
}
}
Exit:
return error;
Fail:
FT_TRACE2(( " not a PCF file\n" ));
PCF_Face_Done( pcfface );
error = FT_THROW( Unknown_File_Format ); /* error */
goto Exit;
}
FT_CALLBACK_DEF( FT_Error )
PCF_Size_Select( FT_Size size,
FT_ULong strike_index )
{
PCF_Accel accel = &( (PCF_Face)size->face )->accel;
FT_Select_Metrics( size->face, strike_index );
size->metrics.ascender = accel->fontAscent * 64;
size->metrics.descender = -accel->fontDescent * 64;
size->metrics.max_advance = accel->maxbounds.characterWidth * 64;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( FT_Error )
PCF_Size_Request( FT_Size size,
FT_Size_Request req )
{
PCF_Face face = (PCF_Face)size->face;
FT_Bitmap_Size* bsize = size->face->available_sizes;
FT_Error error = FT_ERR( Invalid_Pixel_Size );
FT_Long height;
height = FT_REQUEST_HEIGHT( req );
height = ( height + 32 ) >> 6;
switch ( req->type )
{
case FT_SIZE_REQUEST_TYPE_NOMINAL:
if ( height == ( ( bsize->y_ppem + 32 ) >> 6 ) )
error = FT_Err_Ok;
break;
case FT_SIZE_REQUEST_TYPE_REAL_DIM:
if ( height == ( face->accel.fontAscent +
face->accel.fontDescent ) )
error = FT_Err_Ok;
break;
default:
error = FT_THROW( Unimplemented_Feature );
break;
}
if ( error )
return error;
else
return PCF_Size_Select( size, 0 );
}
FT_CALLBACK_DEF( FT_Error )
PCF_Glyph_Load( FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
PCF_Face face = (PCF_Face)FT_SIZE_FACE( size );
FT_Stream stream;
FT_Error error = FT_Err_Ok;
FT_Bitmap* bitmap = &slot->bitmap;
PCF_Metric metric;
FT_ULong bytes;
FT_UNUSED( load_flags );
FT_TRACE1(( "PCF_Glyph_Load: glyph index %d\n", glyph_index ));
if ( !face )
{
error = FT_THROW( Invalid_Face_Handle );
goto Exit;
}
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
stream = face->root.stream;
if ( glyph_index > 0 )
glyph_index--;
metric = face->metrics + glyph_index;
bitmap->rows = (unsigned int)( metric->ascent +
metric->descent );
bitmap->width = (unsigned int)( metric->rightSideBearing -
metric->leftSideBearing );
bitmap->num_grays = 1;
bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
FT_TRACE6(( "BIT_ORDER %d ; BYTE_ORDER %d ; GLYPH_PAD %d\n",
PCF_BIT_ORDER( face->bitmapsFormat ),
PCF_BYTE_ORDER( face->bitmapsFormat ),
PCF_GLYPH_PAD( face->bitmapsFormat ) ));
switch ( PCF_GLYPH_PAD( face->bitmapsFormat ) )
{
case 1:
bitmap->pitch = (int)( ( bitmap->width + 7 ) >> 3 );
break;
case 2:
bitmap->pitch = (int)( ( ( bitmap->width + 15 ) >> 4 ) << 1 );
break;
case 4:
bitmap->pitch = (int)( ( ( bitmap->width + 31 ) >> 5 ) << 2 );
break;
case 8:
bitmap->pitch = (int)( ( ( bitmap->width + 63 ) >> 6 ) << 3 );
break;
default:
return FT_THROW( Invalid_File_Format );
}
/* XXX: to do: are there cases that need repadding the bitmap? */
bytes = (FT_ULong)bitmap->pitch * bitmap->rows;
error = ft_glyphslot_alloc_bitmap( slot, (FT_ULong)bytes );
if ( error )
goto Exit;
if ( FT_STREAM_SEEK( metric->bits ) ||
FT_STREAM_READ( bitmap->buffer, bytes ) )
goto Exit;
if ( PCF_BIT_ORDER( face->bitmapsFormat ) != MSBFirst )
BitOrderInvert( bitmap->buffer, bytes );
if ( ( PCF_BYTE_ORDER( face->bitmapsFormat ) !=
PCF_BIT_ORDER( face->bitmapsFormat ) ) )
{
switch ( PCF_SCAN_UNIT( face->bitmapsFormat ) )
{
case 1:
break;
case 2:
TwoByteSwap( bitmap->buffer, bytes );
break;
case 4:
FourByteSwap( bitmap->buffer, bytes );
break;
}
}
slot->format = FT_GLYPH_FORMAT_BITMAP;
slot->bitmap_left = metric->leftSideBearing;
slot->bitmap_top = metric->ascent;
slot->metrics.horiAdvance = (FT_Pos)( metric->characterWidth * 64 );
slot->metrics.horiBearingX = (FT_Pos)( metric->leftSideBearing * 64 );
slot->metrics.horiBearingY = (FT_Pos)( metric->ascent * 64 );
slot->metrics.width = (FT_Pos)( ( metric->rightSideBearing -
metric->leftSideBearing ) * 64 );
slot->metrics.height = (FT_Pos)( bitmap->rows * 64 );
ft_synthesize_vertical_metrics( &slot->metrics,
( face->accel.fontAscent +
face->accel.fontDescent ) * 64 );
Exit:
return error;
}
/*
*
* BDF SERVICE
*
*/
static FT_Error
pcf_get_bdf_property( PCF_Face face,
const char* prop_name,
BDF_PropertyRec *aproperty )
{
PCF_Property prop;
prop = pcf_find_property( face, prop_name );
if ( prop != NULL )
{
if ( prop->isString )
{
aproperty->type = BDF_PROPERTY_TYPE_ATOM;
aproperty->u.atom = prop->value.atom;
}
else
{
if ( prop->value.l > 0x7FFFFFFFL || prop->value.l < ( -1 - 0x7FFFFFFFL ) )
{
FT_TRACE1(( "pcf_get_bdf_property: " ));
FT_TRACE1(( "too large integer 0x%x is truncated\n" ));
}
/* Apparently, the PCF driver loads all properties as signed integers!
* This really doesn't seem to be a problem, because this is
* sufficient for any meaningful values.
*/
aproperty->type = BDF_PROPERTY_TYPE_INTEGER;
aproperty->u.integer = (FT_Int32)prop->value.l;
}
return 0;
}
return FT_THROW( Invalid_Argument );
}
static FT_Error
pcf_get_charset_id( PCF_Face face,
const char* *acharset_encoding,
const char* *acharset_registry )
{
*acharset_encoding = face->charset_encoding;
*acharset_registry = face->charset_registry;
return 0;
}
static const FT_Service_BDFRec pcf_service_bdf =
{
(FT_BDF_GetCharsetIdFunc)pcf_get_charset_id,
(FT_BDF_GetPropertyFunc) pcf_get_bdf_property
};
/*
*
* SERVICE LIST
*
*/
static const FT_ServiceDescRec pcf_services[] =
{
{ FT_SERVICE_ID_BDF, &pcf_service_bdf },
{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_PCF },
{ NULL, NULL }
};
FT_CALLBACK_DEF( FT_Module_Interface )
pcf_driver_requester( FT_Module module,
const char* name )
{
FT_UNUSED( module );
return ft_service_list_lookup( pcf_services, name );
}
FT_CALLBACK_TABLE_DEF
const FT_Driver_ClassRec pcf_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_NO_OUTLINES,
sizeof ( FT_DriverRec ),
"pcf",
0x10000L,
0x20000L,
0,
0, /* FT_Module_Constructor */
0, /* FT_Module_Destructor */
pcf_driver_requester
},
sizeof ( PCF_FaceRec ),
sizeof ( FT_SizeRec ),
sizeof ( FT_GlyphSlotRec ),
PCF_Face_Init,
PCF_Face_Done,
0, /* FT_Size_InitFunc */
0, /* FT_Size_DoneFunc */
0, /* FT_Slot_InitFunc */
0, /* FT_Slot_DoneFunc */
PCF_Glyph_Load,
0, /* FT_Face_GetKerningFunc */
0, /* FT_Face_AttachFunc */
0, /* FT_Face_GetAdvancesFunc */
PCF_Size_Request,
PCF_Size_Select
};
/* END */