ref: 093f87bfe45160195ade7bd5174bbaaf50ebd6be
dir: /src/bdf/bdfdrivr.c/
/* bdfdrivr.c
FreeType font driver for bdf files
Copyright (C) 2001-2008, 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_BDF_H
#include FT_TRUETYPE_IDS_H
#include FT_SERVICE_BDF_H
#include FT_SERVICE_FONT_FORMAT_H
#include "bdf.h"
#include "bdfdrivr.h"
#include "bdferror.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 bdfdriver
typedef struct BDF_CMapRec_
{
FT_CMapRec cmap;
FT_ULong num_encodings; /* ftobjs.h: FT_CMap->clazz->size */
BDF_encoding_el* encodings;
} BDF_CMapRec, *BDF_CMap;
FT_CALLBACK_DEF( FT_Error )
bdf_cmap_init( FT_CMap bdfcmap,
FT_Pointer init_data )
{
BDF_CMap cmap = (BDF_CMap)bdfcmap;
BDF_Face face = (BDF_Face)FT_CMAP_FACE( cmap );
FT_UNUSED( init_data );
cmap->num_encodings = face->bdffont->glyphs_used;
cmap->encodings = face->en_table;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( void )
bdf_cmap_done( FT_CMap bdfcmap )
{
BDF_CMap cmap = (BDF_CMap)bdfcmap;
cmap->encodings = NULL;
cmap->num_encodings = 0;
}
FT_CALLBACK_DEF( FT_UInt )
bdf_cmap_char_index( FT_CMap bdfcmap,
FT_UInt32 charcode )
{
BDF_CMap cmap = (BDF_CMap)bdfcmap;
BDF_encoding_el* encodings = cmap->encodings;
FT_ULong min, max, mid; /* num_encodings */
FT_UShort result = 0; /* encodings->glyph */
min = 0;
max = cmap->num_encodings;
mid = ( min + max ) >> 1;
while ( min < max )
{
FT_ULong code;
if ( mid >= max || mid < min )
mid = ( min + max ) >> 1;
code = encodings[mid].enc;
if ( charcode == code )
{
/* increase glyph index by 1 -- */
/* we reserve slot 0 for the undefined glyph */
result = encodings[mid].glyph + 1;
break;
}
if ( charcode < code )
max = mid;
else
min = mid + 1;
/* prediction in a continuous block */
mid += charcode - code;
}
return result;
}
FT_CALLBACK_DEF( FT_UInt )
bdf_cmap_char_next( FT_CMap bdfcmap,
FT_UInt32 *acharcode )
{
BDF_CMap cmap = (BDF_CMap)bdfcmap;
BDF_encoding_el* encodings = cmap->encodings;
FT_ULong min, max, mid; /* num_encodings */
FT_UShort result = 0; /* encodings->glyph */
FT_ULong charcode = *acharcode + 1;
min = 0;
max = cmap->num_encodings;
mid = ( min + max ) >> 1;
while ( min < max )
{
FT_ULong code; /* same as BDF_encoding_el.enc */
if ( mid >= max || mid < min )
mid = ( min + max ) >> 1;
code = encodings[mid].enc;
if ( charcode == code )
{
/* increase glyph index by 1 -- */
/* we reserve slot 0 for the undefined glyph */
result = encodings[mid].glyph + 1;
goto Exit;
}
if ( charcode < code )
max = mid;
else
min = mid + 1;
/* prediction in a continuous block */
mid += charcode - code;
}
charcode = 0;
if ( min < cmap->num_encodings )
{
charcode = encodings[min].enc;
result = encodings[min].glyph + 1;
}
Exit:
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "bdf_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 bdf_cmap_class =
{
sizeof ( BDF_CMapRec ),
bdf_cmap_init,
bdf_cmap_done,
bdf_cmap_char_index,
bdf_cmap_char_next,
NULL, NULL, NULL, NULL, NULL
};
static FT_Error
bdf_interpret_style( BDF_Face bdf )
{
FT_Error error = FT_Err_Ok;
FT_Face face = FT_FACE( bdf );
FT_Memory memory = face->memory;
bdf_font_t* font = bdf->bdffont;
bdf_property_t* prop;
const char* strings[4] = { NULL, NULL, NULL, NULL };
size_t lengths[4], nn, len;
face->style_flags = 0;
prop = bdf_get_font_property( font, "SLANT" );
if ( prop && prop->format == BDF_ATOM &&
prop->value.atom &&
( *(prop->value.atom) == 'O' || *(prop->value.atom) == 'o' ||
*(prop->value.atom) == 'I' || *(prop->value.atom) == 'i' ) )
{
face->style_flags |= FT_STYLE_FLAG_ITALIC;
strings[2] = ( *(prop->value.atom) == 'O' || *(prop->value.atom) == 'o' )
? "Oblique"
: "Italic";
}
prop = bdf_get_font_property( font, "WEIGHT_NAME" );
if ( prop && prop->format == BDF_ATOM &&
prop->value.atom &&
( *(prop->value.atom) == 'B' || *(prop->value.atom) == 'b' ) )
{
face->style_flags |= FT_STYLE_FLAG_BOLD;
strings[1] = "Bold";
}
prop = bdf_get_font_property( font, "SETWIDTH_NAME" );
if ( prop && prop->format == BDF_ATOM &&
prop->value.atom && *(prop->value.atom) &&
!( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
strings[3] = (const char *)(prop->value.atom);
prop = bdf_get_font_property( font, "ADD_STYLE_NAME" );
if ( prop && prop->format == BDF_ATOM &&
prop->value.atom && *(prop->value.atom) &&
!( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
strings[0] = (const char *)(prop->value.atom);
for ( len = 0, nn = 0; nn < 4; nn++ )
{
lengths[nn] = 0;
if ( strings[nn] )
{
lengths[nn] = ft_strlen( strings[nn] );
len += lengths[nn] + 1;
}
}
if ( len == 0 )
{
strings[0] = "Regular";
lengths[0] = ft_strlen( strings[0] );
len = lengths[0] + 1;
}
{
char* s;
if ( FT_ALLOC( face->style_name, len ) )
return error;
s = face->style_name;
for ( nn = 0; nn < 4; nn++ )
{
const char* src = strings[nn];
len = lengths[nn];
if ( !src )
continue;
/* separate elements with a space */
if ( s != face->style_name )
*s++ = ' ';
ft_memcpy( s, src, len );
/* need to convert spaces to dashes for */
/* add_style_name and setwidth_name */
if ( nn == 0 || nn == 3 )
{
size_t mm;
for ( mm = 0; mm < len; mm++ )
if ( s[mm] == ' ' )
s[mm] = '-';
}
s += len;
}
*s = 0;
}
return error;
}
FT_CALLBACK_DEF( void )
BDF_Face_Done( FT_Face bdfface ) /* BDF_Face */
{
BDF_Face face = (BDF_Face)bdfface;
FT_Memory memory;
if ( !face )
return;
memory = FT_FACE_MEMORY( face );
bdf_free_font( face->bdffont );
FT_FREE( face->en_table );
FT_FREE( face->charset_encoding );
FT_FREE( face->charset_registry );
FT_FREE( bdfface->family_name );
FT_FREE( bdfface->style_name );
FT_FREE( bdfface->available_sizes );
FT_FREE( face->bdffont );
}
FT_CALLBACK_DEF( FT_Error )
BDF_Face_Init( FT_Stream stream,
FT_Face bdfface, /* BDF_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
FT_Error error = FT_Err_Ok;
BDF_Face face = (BDF_Face)bdfface;
FT_Memory memory = FT_FACE_MEMORY( face );
bdf_font_t* font = NULL;
bdf_options_t options;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_TRACE2(( "BDF driver\n" ));
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
options.correct_metrics = 1; /* FZ XXX: options semantics */
options.keep_unencoded = 1;
options.keep_comments = 0;
options.font_spacing = BDF_PROPORTIONAL;
error = bdf_load_font( stream, memory, &options, &font );
if ( FT_ERR_EQ( error, Missing_Startfont_Field ) )
{
FT_TRACE2(( " not a BDF file\n" ));
goto Fail;
}
else if ( error )
goto Exit;
/* we have a bdf font: let's construct the face object */
face->bdffont = font;
/* BDF cannot have multiple faces in a single font file.
* XXX: non-zero face_index is already invalid argument, but
* Type1, Type42 driver has 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(( "BDF_Face_Init: invalid face index\n" ));
BDF_Face_Done( bdfface );
return FT_THROW( Invalid_Argument );
}
{
bdf_property_t* prop = NULL;
FT_TRACE4(( " number of glyphs: allocated %d (used %d)\n",
font->glyphs_size,
font->glyphs_used ));
FT_TRACE4(( " number of unencoded glyphs: allocated %d (used %d)\n",
font->unencoded_size,
font->unencoded_used ));
bdfface->num_faces = 1;
bdfface->face_index = 0;
bdfface->face_flags |= FT_FACE_FLAG_FIXED_SIZES |
FT_FACE_FLAG_HORIZONTAL;
prop = bdf_get_font_property( font, "SPACING" );
if ( prop && prop->format == BDF_ATOM &&
prop->value.atom &&
( *(prop->value.atom) == 'M' || *(prop->value.atom) == 'm' ||
*(prop->value.atom) == 'C' || *(prop->value.atom) == 'c' ) )
bdfface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* FZ XXX: TO DO: FT_FACE_FLAGS_VERTICAL */
/* FZ XXX: I need a font to implement this */
prop = bdf_get_font_property( font, "FAMILY_NAME" );
if ( prop && prop->value.atom )
{
if ( FT_STRDUP( bdfface->family_name, prop->value.atom ) )
goto Exit;
}
else
bdfface->family_name = NULL;
if ( FT_SET_ERROR( bdf_interpret_style( face ) ) )
goto Exit;
/* the number of glyphs (with one slot for the undefined glyph */
/* at position 0 and all unencoded glyphs) */
bdfface->num_glyphs = (FT_Long)( font->glyphs_size + 1 );
bdfface->num_fixed_sizes = 1;
if ( FT_NEW_ARRAY( bdfface->available_sizes, 1 ) )
goto Exit;
{
FT_Bitmap_Size* bsize = bdfface->available_sizes;
FT_Short resolution_x = 0, resolution_y = 0;
long value;
FT_ZERO( bsize );
/* sanity checks */
if ( font->font_ascent > 0x7FFF || font->font_ascent < -0x7FFF )
{
font->font_ascent = font->font_ascent < 0 ? -0x7FFF : 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping font ascent to value %d\n",
font->font_ascent ));
}
if ( font->font_descent > 0x7FFF || font->font_descent < -0x7FFF )
{
font->font_descent = font->font_descent < 0 ? -0x7FFF : 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping font descent to value %d\n",
font->font_descent ));
}
bsize->height = (FT_Short)( font->font_ascent + font->font_descent );
prop = bdf_get_font_property( font, "AVERAGE_WIDTH" );
if ( prop )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( prop->value.l < 0 )
FT_TRACE0(( "BDF_Face_Init: negative average width\n" ));
#endif
if ( prop->value.l > 0x7FFFL * 10 - 5 ||
prop->value.l < -( 0x7FFFL * 10 - 5 ) )
{
bsize->width = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping average width to value %d\n",
bsize->width ));
}
else
bsize->width = FT_ABS( (FT_Short)( ( prop->value.l + 5 ) / 10 ) );
}
else
{
/* this is a heuristical value */
bsize->width = (FT_Short)FT_MulDiv( bsize->height, 2, 3 );
}
prop = bdf_get_font_property( font, "POINT_SIZE" );
if ( prop )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( prop->value.l < 0 )
FT_TRACE0(( "BDF_Face_Init: negative point size\n" ));
#endif
/* convert from 722.7 decipoints to 72 points per inch */
if ( prop->value.l > 0x504C2L || /* 0x7FFF * 72270/7200 */
prop->value.l < -0x504C2L )
{
bsize->size = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping point size to value %d\n",
bsize->size ));
}
else
bsize->size = FT_MulDiv( FT_ABS( prop->value.l ),
64 * 7200,
72270L );
}
else if ( font->point_size )
{
if ( font->point_size > 0x7FFF )
{
bsize->size = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping point size to value %d\n",
bsize->size ));
}
else
bsize->size = (FT_Pos)font->point_size << 6;
}
else
{
/* this is a heuristical value */
bsize->size = bsize->width * 64;
}
prop = bdf_get_font_property( font, "PIXEL_SIZE" );
if ( prop )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( prop->value.l < 0 )
FT_TRACE0(( "BDF_Face_Init: negative pixel size\n" ));
#endif
if ( prop->value.l > 0x7FFF || prop->value.l < -0x7FFF )
{
bsize->y_ppem = 0x7FFF << 6;
FT_TRACE0(( "BDF_Face_Init: clamping pixel size to value %d\n",
bsize->y_ppem ));
}
else
bsize->y_ppem = FT_ABS( (FT_Short)prop->value.l ) << 6;
}
prop = bdf_get_font_property( font, "RESOLUTION_X" );
if ( prop )
value = prop->value.l;
else
value = (long)font->resolution_x;
if ( value )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( value < 0 )
FT_TRACE0(( "BDF_Face_Init: negative X resolution\n" ));
#endif
if ( value > 0x7FFF || value < -0x7FFF )
{
resolution_x = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping X resolution to value %d\n",
resolution_x ));
}
else
resolution_x = FT_ABS( (FT_Short)value );
}
prop = bdf_get_font_property( font, "RESOLUTION_Y" );
if ( prop )
value = prop->value.l;
else
value = (long)font->resolution_y;
if ( value )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( value < 0 )
FT_TRACE0(( "BDF_Face_Init: negative Y resolution\n" ));
#endif
if ( value > 0x7FFF || value < -0x7FFF )
{
resolution_y = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping Y resolution to value %d\n",
resolution_y ));
}
else
resolution_y = FT_ABS( (FT_Short)value );
}
if ( bsize->y_ppem == 0 )
{
bsize->y_ppem = bsize->size;
if ( resolution_y )
bsize->y_ppem = FT_MulDiv( bsize->y_ppem, resolution_y, 72 );
}
if ( resolution_x && resolution_y )
bsize->x_ppem = FT_MulDiv( bsize->y_ppem,
resolution_x,
resolution_y );
else
bsize->x_ppem = bsize->y_ppem;
}
/* encoding table */
{
bdf_glyph_t* cur = font->glyphs;
unsigned long n;
if ( FT_NEW_ARRAY( face->en_table, font->glyphs_size ) )
goto Exit;
face->default_glyph = 0;
for ( n = 0; n < font->glyphs_size; n++ )
{
(face->en_table[n]).enc = cur[n].encoding;
FT_TRACE4(( " idx %d, val 0x%lX\n", n, cur[n].encoding ));
(face->en_table[n]).glyph = (FT_UShort)n;
if ( cur[n].encoding == font->default_char )
{
if ( n < FT_UINT_MAX )
face->default_glyph = (FT_UInt)n;
else
FT_TRACE1(( "BDF_Face_Init:"
" idx %d is too large for this system\n", n ));
}
}
}
/* charmaps */
{
bdf_property_t *charset_registry, *charset_encoding;
FT_Bool unicode_charmap = 0;
charset_registry =
bdf_get_font_property( font, "CHARSET_REGISTRY" );
charset_encoding =
bdf_get_font_property( font, "CHARSET_ENCODING" );
if ( charset_registry && charset_encoding )
{
if ( charset_registry->format == BDF_ATOM &&
charset_encoding->format == BDF_ATOM &&
charset_registry->value.atom &&
charset_encoding->value.atom )
{
const char* s;
if ( FT_STRDUP( face->charset_encoding,
charset_encoding->value.atom ) ||
FT_STRDUP( face->charset_registry,
charset_registry->value.atom ) )
goto Exit;
/* Uh, oh, compare first letters manually to avoid dependency */
/* on locales. */
s = face->charset_registry;
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( &bdf_cmap_class, NULL, &charmap, NULL );
}
goto Exit;
}
}
/* otherwise assume Adobe standard encoding */
{
FT_CharMapRec charmap;
charmap.face = FT_FACE( face );
charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
charmap.platform_id = TT_PLATFORM_ADOBE;
charmap.encoding_id = TT_ADOBE_ID_STANDARD;
error = FT_CMap_New( &bdf_cmap_class, NULL, &charmap, NULL );
/* Select default charmap */
if ( bdfface->num_charmaps )
bdfface->charmap = bdfface->charmaps[0];
}
}
}
Exit:
return error;
Fail:
BDF_Face_Done( bdfface );
return FT_THROW( Unknown_File_Format );
}
FT_CALLBACK_DEF( FT_Error )
BDF_Size_Select( FT_Size size,
FT_ULong strike_index )
{
bdf_font_t* bdffont = ( (BDF_Face)size->face )->bdffont;
FT_Select_Metrics( size->face, strike_index );
size->metrics.ascender = bdffont->font_ascent * 64;
size->metrics.descender = -bdffont->font_descent * 64;
size->metrics.max_advance = bdffont->bbx.width * 64;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( FT_Error )
BDF_Size_Request( FT_Size size,
FT_Size_Request req )
{
FT_Face face = size->face;
FT_Bitmap_Size* bsize = face->available_sizes;
bdf_font_t* bdffont = ( (BDF_Face)face )->bdffont;
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 == ( bdffont->font_ascent +
bdffont->font_descent ) )
error = FT_Err_Ok;
break;
default:
error = FT_THROW( Unimplemented_Feature );
break;
}
if ( error )
return error;
else
return BDF_Size_Select( size, 0 );
}
FT_CALLBACK_DEF( FT_Error )
BDF_Glyph_Load( FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
BDF_Face bdf = (BDF_Face)FT_SIZE_FACE( size );
FT_Face face = FT_FACE( bdf );
FT_Error error = FT_Err_Ok;
FT_Bitmap* bitmap = &slot->bitmap;
bdf_glyph_t glyph;
int bpp = bdf->bdffont->bpp;
FT_UNUSED( load_flags );
if ( !face )
{
error = FT_THROW( Invalid_Face_Handle );
goto Exit;
}
if ( glyph_index >= (FT_UInt)face->num_glyphs )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
FT_TRACE1(( "BDF_Glyph_Load: glyph index %d\n", glyph_index ));
/* index 0 is the undefined glyph */
if ( glyph_index == 0 )
glyph_index = bdf->default_glyph;
else
glyph_index--;
/* slot, bitmap => freetype, glyph => bdflib */
glyph = bdf->bdffont->glyphs[glyph_index];
bitmap->rows = glyph.bbx.height;
bitmap->width = glyph.bbx.width;
if ( glyph.bpr > FT_INT_MAX )
FT_TRACE1(( "BDF_Glyph_Load: too large pitch %d is truncated\n",
glyph.bpr ));
bitmap->pitch = (int)glyph.bpr; /* same as FT_Bitmap.pitch */
/* note: we don't allocate a new array to hold the bitmap; */
/* we can simply point to it */
ft_glyphslot_set_bitmap( slot, glyph.bitmap );
switch ( bpp )
{
case 1:
bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
break;
case 2:
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY2;
break;
case 4:
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY4;
break;
case 8:
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
bitmap->num_grays = 256;
break;
}
slot->format = FT_GLYPH_FORMAT_BITMAP;
slot->bitmap_left = glyph.bbx.x_offset;
slot->bitmap_top = glyph.bbx.ascent;
slot->metrics.horiAdvance = (FT_Pos)( glyph.dwidth * 64 );
slot->metrics.horiBearingX = (FT_Pos)( glyph.bbx.x_offset * 64 );
slot->metrics.horiBearingY = (FT_Pos)( glyph.bbx.ascent * 64 );
slot->metrics.width = (FT_Pos)( bitmap->width * 64 );
slot->metrics.height = (FT_Pos)( bitmap->rows * 64 );
/*
* XXX DWIDTH1 and VVECTOR should be parsed and
* used here, provided such fonts do exist.
*/
ft_synthesize_vertical_metrics( &slot->metrics,
bdf->bdffont->bbx.height * 64 );
Exit:
return error;
}
/*
*
* BDF SERVICE
*
*/
static FT_Error
bdf_get_bdf_property( BDF_Face face,
const char* prop_name,
BDF_PropertyRec *aproperty )
{
bdf_property_t* prop;
FT_ASSERT( face && face->bdffont );
prop = bdf_get_font_property( face->bdffont, prop_name );
if ( prop )
{
switch ( prop->format )
{
case BDF_ATOM:
aproperty->type = BDF_PROPERTY_TYPE_ATOM;
aproperty->u.atom = prop->value.atom;
break;
case BDF_INTEGER:
if ( prop->value.l > 0x7FFFFFFFL || prop->value.l < ( -1 - 0x7FFFFFFFL ) )
{
FT_TRACE1(( "bdf_get_bdf_property:"
" too large integer 0x%x is truncated\n" ));
}
aproperty->type = BDF_PROPERTY_TYPE_INTEGER;
aproperty->u.integer = (FT_Int32)prop->value.l;
break;
case BDF_CARDINAL:
if ( prop->value.ul > 0xFFFFFFFFUL )
{
FT_TRACE1(( "bdf_get_bdf_property:"
" too large cardinal 0x%x is truncated\n" ));
}
aproperty->type = BDF_PROPERTY_TYPE_CARDINAL;
aproperty->u.cardinal = (FT_UInt32)prop->value.ul;
break;
default:
goto Fail;
}
return 0;
}
Fail:
return FT_THROW( Invalid_Argument );
}
static FT_Error
bdf_get_charset_id( BDF_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 bdf_service_bdf =
{
(FT_BDF_GetCharsetIdFunc)bdf_get_charset_id, /* get_charset_id */
(FT_BDF_GetPropertyFunc) bdf_get_bdf_property /* get_property */
};
/*
*
* SERVICES LIST
*
*/
static const FT_ServiceDescRec bdf_services[] =
{
{ FT_SERVICE_ID_BDF, &bdf_service_bdf },
{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_BDF },
{ NULL, NULL }
};
FT_CALLBACK_DEF( FT_Module_Interface )
bdf_driver_requester( FT_Module module,
const char* name )
{
FT_UNUSED( module );
return ft_service_list_lookup( bdf_services, name );
}
FT_CALLBACK_TABLE_DEF
const FT_Driver_ClassRec bdf_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_NO_OUTLINES,
sizeof ( FT_DriverRec ),
"bdf",
0x10000L,
0x20000L,
NULL, /* module-specific interface */
NULL, /* FT_Module_Constructor module_init */
NULL, /* FT_Module_Destructor module_done */
bdf_driver_requester /* FT_Module_Requester get_interface */
},
sizeof ( BDF_FaceRec ),
sizeof ( FT_SizeRec ),
sizeof ( FT_GlyphSlotRec ),
BDF_Face_Init, /* FT_Face_InitFunc init_face */
BDF_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 */
BDF_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 */
BDF_Size_Request, /* FT_Size_RequestFunc request_size */
BDF_Size_Select /* FT_Size_SelectFunc select_size */
};
/* END */