ref: 2c3e895c745fe417e501195310de973867f0d43e
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
#include FT_SERVICE_PROPERTIES_H
#include FT_DRIVER_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
/*
* This file uses X11 terminology for PCF data; an `encoding' in X11 speak
* is the same as a `character code' in FreeType speak.
*/
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;
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;
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;
}
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, face_index );
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! */
FT_TRACE2(( " ... try gzip stream\n" ));
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! */
FT_TRACE2(( " ... try LZW stream\n" ));
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! */
FT_TRACE2(( " ... try Bzip2 stream\n" ));
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, face_index );
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 )
goto Exit;
else 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;
/* another name for ASCII */
else if ( !ft_strcmp( s, "646.1991" ) &&
!ft_strcmp( face->charset_encoding, "IRV" ) )
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 );
}
}
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_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;
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;
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 );
}
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 );
if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY )
goto Exit;
/* 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;
}
}
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 )
{
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" ));
}
/*
* 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 FT_Err_Ok;
}
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 FT_Err_Ok;
}
static const FT_Service_BDFRec pcf_service_bdf =
{
(FT_BDF_GetCharsetIdFunc)pcf_get_charset_id, /* get_charset_id */
(FT_BDF_GetPropertyFunc) pcf_get_bdf_property /* get_property */
};
/*
* PROPERTY SERVICE
*
*/
static FT_Error
pcf_property_set( FT_Module module, /* PCF_Driver */
const char* property_name,
const void* value,
FT_Bool value_is_string )
{
#ifdef PCF_CONFIG_OPTION_LONG_FAMILY_NAMES
FT_Error error = FT_Err_Ok;
PCF_Driver driver = (PCF_Driver)module;
#ifndef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
FT_UNUSED( value_is_string );
#endif
if ( !ft_strcmp( property_name, "no-long-family-names" ) )
{
#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
if ( value_is_string )
{
const char* s = (const char*)value;
long lfn = ft_strtol( s, NULL, 10 );
if ( lfn == 0 )
driver->no_long_family_names = 0;
else if ( lfn == 1 )
driver->no_long_family_names = 1;
else
return FT_THROW( Invalid_Argument );
}
else
#endif
{
FT_Bool* no_long_family_names = (FT_Bool*)value;
driver->no_long_family_names = *no_long_family_names;
}
return error;
}
#else /* !PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */
FT_UNUSED( module );
FT_UNUSED( value );
FT_UNUSED( value_is_string );
#ifndef FT_DEBUG_LEVEL_TRACE
FT_UNUSED( property_name );
#endif
#endif /* !PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */
FT_TRACE0(( "pcf_property_set: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}
static FT_Error
pcf_property_get( FT_Module module, /* PCF_Driver */
const char* property_name,
const void* value )
{
#ifdef PCF_CONFIG_OPTION_LONG_FAMILY_NAMES
FT_Error error = FT_Err_Ok;
PCF_Driver driver = (PCF_Driver)module;
if ( !ft_strcmp( property_name, "no-long-family-names" ) )
{
FT_Bool no_long_family_names = driver->no_long_family_names;
FT_Bool* val = (FT_Bool*)value;
*val = no_long_family_names;
return error;
}
#else /* !PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */
FT_UNUSED( module );
FT_UNUSED( value );
#ifndef FT_DEBUG_LEVEL_TRACE
FT_UNUSED( property_name );
#endif
#endif /* !PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */
FT_TRACE0(( "pcf_property_get: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}
FT_DEFINE_SERVICE_PROPERTIESREC(
pcf_service_properties,
(FT_Properties_SetFunc)pcf_property_set, /* set_property */
(FT_Properties_GetFunc)pcf_property_get ) /* get_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 },
{ FT_SERVICE_ID_PROPERTIES, &pcf_service_properties },
{ 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_DEF( FT_Error )
pcf_driver_init( FT_Module module ) /* PCF_Driver */
{
#ifdef PCF_CONFIG_OPTION_LONG_FAMILY_NAMES
PCF_Driver driver = (PCF_Driver)module;
driver->no_long_family_names = 0;
#else
FT_UNUSED( module );
#endif
return FT_Err_Ok;
}
FT_CALLBACK_DEF( void )
pcf_driver_done( FT_Module module ) /* PCF_Driver */
{
FT_UNUSED( module );
}
FT_CALLBACK_TABLE_DEF
const FT_Driver_ClassRec pcf_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_NO_OUTLINES,
sizeof ( PCF_DriverRec ),
"pcf",
0x10000L,
0x20000L,
NULL, /* module-specific interface */
pcf_driver_init, /* FT_Module_Constructor module_init */
pcf_driver_done, /* FT_Module_Destructor module_done */
pcf_driver_requester /* FT_Module_Requester get_interface */
},
sizeof ( PCF_FaceRec ),
sizeof ( FT_SizeRec ),
sizeof ( FT_GlyphSlotRec ),
PCF_Face_Init, /* FT_Face_InitFunc init_face */
PCF_Face_Done, /* FT_Face_DoneFunc done_face */
NULL, /* FT_Size_InitFunc init_size */
NULL, /* FT_Size_DoneFunc done_size */
NULL, /* FT_Slot_InitFunc init_slot */
NULL, /* FT_Slot_DoneFunc done_slot */
PCF_Glyph_Load, /* FT_Slot_LoadFunc load_glyph */
NULL, /* FT_Face_GetKerningFunc get_kerning */
NULL, /* FT_Face_AttachFunc attach_file */
NULL, /* FT_Face_GetAdvancesFunc get_advances */
PCF_Size_Request, /* FT_Size_RequestFunc request_size */
PCF_Size_Select /* FT_Size_SelectFunc select_size */
};
/* END */