--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/pcf/pcfread.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,1278 @@
+/* pcfread.c
+
+ FreeType font driver for pcf fonts
+
+ Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010 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 "pcf.h"
+#include "pcfread.h"
+
+#include "pcferror.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_pcfread
+
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+ static const char* const tableNames[] =
+ {
+ "prop", "accl", "mtrcs", "bmps", "imtrcs",
+ "enc", "swidth", "names", "accel"
+ };
+#endif
+
+
+ static
+ const FT_Frame_Field pcf_toc_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_TocRec
+
+ FT_FRAME_START( 8 ),
+ FT_FRAME_ULONG_LE( version ),
+ FT_FRAME_ULONG_LE( count ),
+ FT_FRAME_END
+ };
+
+
+ static
+ const FT_Frame_Field pcf_table_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_TableRec
+
+ FT_FRAME_START( 16 ),
+ FT_FRAME_ULONG_LE( type ),
+ FT_FRAME_ULONG_LE( format ),
+ FT_FRAME_ULONG_LE( size ),
+ FT_FRAME_ULONG_LE( offset ),
+ FT_FRAME_END
+ };
+
+
+ static FT_Error
+ pcf_read_TOC( FT_Stream stream,
+ PCF_Face face )
+ {
+ FT_Error error;
+ PCF_Toc toc = &face->toc;
+ PCF_Table tables;
+
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_UInt n;
+
+
+ if ( FT_STREAM_SEEK ( 0 ) ||
+ FT_STREAM_READ_FIELDS ( pcf_toc_header, toc ) )
+ return PCF_Err_Cannot_Open_Resource;
+
+ if ( toc->version != PCF_FILE_VERSION ||
+ toc->count > FT_ARRAY_MAX( face->toc.tables ) ||
+ toc->count == 0 )
+ return PCF_Err_Invalid_File_Format;
+
+ if ( FT_NEW_ARRAY( face->toc.tables, toc->count ) )
+ return PCF_Err_Out_Of_Memory;
+
+ tables = face->toc.tables;
+ for ( n = 0; n < toc->count; n++ )
+ {
+ if ( FT_STREAM_READ_FIELDS( pcf_table_header, tables ) )
+ goto Exit;
+ tables++;
+ }
+
+ /* Sort tables and check for overlaps. Because they are almost */
+ /* always ordered already, an in-place bubble sort with simultaneous */
+ /* boundary checking seems appropriate. */
+ tables = face->toc.tables;
+
+ for ( n = 0; n < toc->count - 1; n++ )
+ {
+ FT_UInt i, have_change;
+
+
+ have_change = 0;
+
+ for ( i = 0; i < toc->count - 1 - n; i++ )
+ {
+ PCF_TableRec tmp;
+
+
+ if ( tables[i].offset > tables[i + 1].offset )
+ {
+ tmp = tables[i];
+ tables[i] = tables[i + 1];
+ tables[i + 1] = tmp;
+
+ have_change = 1;
+ }
+
+ if ( ( tables[i].size > tables[i + 1].offset ) ||
+ ( tables[i].offset > tables[i + 1].offset - tables[i].size ) )
+ return PCF_Err_Invalid_Offset;
+ }
+
+ if ( !have_change )
+ break;
+ }
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+
+ {
+ FT_UInt i, j;
+ const char* name = "?";
+
+
+ FT_TRACE4(( "pcf_read_TOC:\n" ));
+
+ FT_TRACE4(( " number of tables: %ld\n", face->toc.count ));
+
+ tables = face->toc.tables;
+ for ( i = 0; i < toc->count; i++ )
+ {
+ for ( j = 0; j < sizeof ( tableNames ) / sizeof ( tableNames[0] );
+ j++ )
+ if ( tables[i].type == (FT_UInt)( 1 << j ) )
+ name = tableNames[j];
+
+ FT_TRACE4(( " %d: type=%s, format=0x%X, "
+ "size=%ld (0x%lX), offset=%ld (0x%lX)\n",
+ i, name,
+ tables[i].format,
+ tables[i].size, tables[i].size,
+ tables[i].offset, tables[i].offset ));
+ }
+ }
+
+#endif
+
+ return PCF_Err_Ok;
+
+ Exit:
+ FT_FREE( face->toc.tables );
+ return error;
+ }
+
+
+#define PCF_METRIC_SIZE 12
+
+ static
+ const FT_Frame_Field pcf_metric_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_MetricRec
+
+ FT_FRAME_START( PCF_METRIC_SIZE ),
+ FT_FRAME_SHORT_LE( leftSideBearing ),
+ FT_FRAME_SHORT_LE( rightSideBearing ),
+ FT_FRAME_SHORT_LE( characterWidth ),
+ FT_FRAME_SHORT_LE( ascent ),
+ FT_FRAME_SHORT_LE( descent ),
+ FT_FRAME_SHORT_LE( attributes ),
+ FT_FRAME_END
+ };
+
+
+ static
+ const FT_Frame_Field pcf_metric_msb_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_MetricRec
+
+ FT_FRAME_START( PCF_METRIC_SIZE ),
+ FT_FRAME_SHORT( leftSideBearing ),
+ FT_FRAME_SHORT( rightSideBearing ),
+ FT_FRAME_SHORT( characterWidth ),
+ FT_FRAME_SHORT( ascent ),
+ FT_FRAME_SHORT( descent ),
+ FT_FRAME_SHORT( attributes ),
+ FT_FRAME_END
+ };
+
+
+#define PCF_COMPRESSED_METRIC_SIZE 5
+
+ static
+ const FT_Frame_Field pcf_compressed_metric_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_Compressed_MetricRec
+
+ FT_FRAME_START( PCF_COMPRESSED_METRIC_SIZE ),
+ FT_FRAME_BYTE( leftSideBearing ),
+ FT_FRAME_BYTE( rightSideBearing ),
+ FT_FRAME_BYTE( characterWidth ),
+ FT_FRAME_BYTE( ascent ),
+ FT_FRAME_BYTE( descent ),
+ FT_FRAME_END
+ };
+
+
+ static FT_Error
+ pcf_get_metric( FT_Stream stream,
+ FT_ULong format,
+ PCF_Metric metric )
+ {
+ FT_Error error = PCF_Err_Ok;
+
+
+ if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ {
+ const FT_Frame_Field* fields;
+
+
+ /* parsing normal metrics */
+ fields = PCF_BYTE_ORDER( format ) == MSBFirst
+ ? pcf_metric_msb_header
+ : pcf_metric_header;
+
+ /* the following sets `error' but doesn't return in case of failure */
+ (void)FT_STREAM_READ_FIELDS( fields, metric );
+ }
+ else
+ {
+ PCF_Compressed_MetricRec compr;
+
+
+ /* parsing compressed metrics */
+ if ( FT_STREAM_READ_FIELDS( pcf_compressed_metric_header, &compr ) )
+ goto Exit;
+
+ metric->leftSideBearing = (FT_Short)( compr.leftSideBearing - 0x80 );
+ metric->rightSideBearing = (FT_Short)( compr.rightSideBearing - 0x80 );
+ metric->characterWidth = (FT_Short)( compr.characterWidth - 0x80 );
+ metric->ascent = (FT_Short)( compr.ascent - 0x80 );
+ metric->descent = (FT_Short)( compr.descent - 0x80 );
+ metric->attributes = 0;
+ }
+
+ Exit:
+ return error;
+ }
+
+
+ static FT_Error
+ pcf_seek_to_table_type( FT_Stream stream,
+ PCF_Table tables,
+ FT_ULong ntables, /* same as PCF_Toc->count */
+ FT_ULong type,
+ FT_ULong *aformat,
+ FT_ULong *asize )
+ {
+ FT_Error error = PCF_Err_Invalid_File_Format;
+ FT_ULong i;
+
+
+ for ( i = 0; i < ntables; i++ )
+ if ( tables[i].type == type )
+ {
+ if ( stream->pos > tables[i].offset )
+ {
+ error = PCF_Err_Invalid_Stream_Skip;
+ goto Fail;
+ }
+
+ if ( FT_STREAM_SKIP( tables[i].offset - stream->pos ) )
+ {
+ error = PCF_Err_Invalid_Stream_Skip;
+ goto Fail;
+ }
+
+ *asize = tables[i].size;
+ *aformat = tables[i].format;
+
+ return PCF_Err_Ok;
+ }
+
+ Fail:
+ *asize = 0;
+ return error;
+ }
+
+
+ static FT_Bool
+ pcf_has_table_type( PCF_Table tables,
+ FT_ULong ntables, /* same as PCF_Toc->count */
+ FT_ULong type )
+ {
+ FT_ULong i;
+
+
+ for ( i = 0; i < ntables; i++ )
+ if ( tables[i].type == type )
+ return TRUE;
+
+ return FALSE;
+ }
+
+
+#define PCF_PROPERTY_SIZE 9
+
+ static
+ const FT_Frame_Field pcf_property_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_ParsePropertyRec
+
+ FT_FRAME_START( PCF_PROPERTY_SIZE ),
+ FT_FRAME_LONG_LE( name ),
+ FT_FRAME_BYTE ( isString ),
+ FT_FRAME_LONG_LE( value ),
+ FT_FRAME_END
+ };
+
+
+ static
+ const FT_Frame_Field pcf_property_msb_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_ParsePropertyRec
+
+ FT_FRAME_START( PCF_PROPERTY_SIZE ),
+ FT_FRAME_LONG( name ),
+ FT_FRAME_BYTE( isString ),
+ FT_FRAME_LONG( value ),
+ FT_FRAME_END
+ };
+
+
+ FT_LOCAL_DEF( PCF_Property )
+ pcf_find_property( PCF_Face face,
+ const FT_String* prop )
+ {
+ PCF_Property properties = face->properties;
+ FT_Bool found = 0;
+ int i;
+
+
+ for ( i = 0 ; i < face->nprops && !found; i++ )
+ {
+ if ( !ft_strcmp( properties[i].name, prop ) )
+ found = 1;
+ }
+
+ if ( found )
+ return properties + i - 1;
+ else
+ return NULL;
+ }
+
+
+ static FT_Error
+ pcf_get_properties( FT_Stream stream,
+ PCF_Face face )
+ {
+ PCF_ParseProperty props = 0;
+ PCF_Property properties;
+ FT_ULong nprops, i;
+ FT_ULong format, size;
+ FT_Error error;
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_ULong string_size;
+ FT_String* strings = 0;
+
+
+ error = pcf_seek_to_table_type( stream,
+ face->toc.tables,
+ face->toc.count,
+ PCF_PROPERTIES,
+ &format,
+ &size );
+ if ( error )
+ goto Bail;
+
+ if ( FT_READ_ULONG_LE( format ) )
+ goto Bail;
+
+ FT_TRACE4(( "pcf_get_properties:\n" ));
+
+ FT_TRACE4(( " format = %ld\n", format ));
+
+ if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ goto Bail;
+
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_ULONG( nprops );
+ else
+ (void)FT_READ_ULONG_LE( nprops );
+ if ( error )
+ goto Bail;
+
+ FT_TRACE4(( " nprop = %d (truncate %d props)\n",
+ (int)nprops, nprops - (int)nprops ));
+
+ nprops = (int)nprops;
+
+ /* rough estimate */
+ if ( nprops > size / PCF_PROPERTY_SIZE )
+ {
+ error = PCF_Err_Invalid_Table;
+ goto Bail;
+ }
+
+ face->nprops = (int)nprops;
+
+ if ( FT_NEW_ARRAY( props, nprops ) )
+ goto Bail;
+
+ for ( i = 0; i < nprops; i++ )
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ {
+ if ( FT_STREAM_READ_FIELDS( pcf_property_msb_header, props + i ) )
+ goto Bail;
+ }
+ else
+ {
+ if ( FT_STREAM_READ_FIELDS( pcf_property_header, props + i ) )
+ goto Bail;
+ }
+ }
+
+ /* pad the property array */
+ /* */
+ /* clever here - nprops is the same as the number of odd-units read, */
+ /* as only isStringProp are odd length (Keith Packard) */
+ /* */
+ if ( nprops & 3 )
+ {
+ i = 4 - ( nprops & 3 );
+ if ( FT_STREAM_SKIP( i ) )
+ {
+ error = PCF_Err_Invalid_Stream_Skip;
+ goto Bail;
+ }
+ }
+
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_ULONG( string_size );
+ else
+ (void)FT_READ_ULONG_LE( string_size );
+ if ( error )
+ goto Bail;
+
+ FT_TRACE4(( " string_size = %ld\n", string_size ));
+
+ /* rough estimate */
+ if ( string_size > size - nprops * PCF_PROPERTY_SIZE )
+ {
+ error = PCF_Err_Invalid_Table;
+ goto Bail;
+ }
+
+ if ( FT_NEW_ARRAY( strings, string_size ) )
+ goto Bail;
+
+ error = FT_Stream_Read( stream, (FT_Byte*)strings, string_size );
+ if ( error )
+ goto Bail;
+
+ if ( FT_NEW_ARRAY( properties, nprops ) )
+ goto Bail;
+
+ face->properties = properties;
+
+ for ( i = 0; i < nprops; i++ )
+ {
+ FT_Long name_offset = props[i].name;
+
+
+ if ( ( name_offset < 0 ) ||
+ ( (FT_ULong)name_offset > string_size ) )
+ {
+ error = PCF_Err_Invalid_Offset;
+ goto Bail;
+ }
+
+ if ( FT_STRDUP( properties[i].name, strings + name_offset ) )
+ goto Bail;
+
+ FT_TRACE4(( " %s:", properties[i].name ));
+
+ properties[i].isString = props[i].isString;
+
+ if ( props[i].isString )
+ {
+ FT_Long value_offset = props[i].value;
+
+
+ if ( ( value_offset < 0 ) ||
+ ( (FT_ULong)value_offset > string_size ) )
+ {
+ error = PCF_Err_Invalid_Offset;
+ goto Bail;
+ }
+
+ if ( FT_STRDUP( properties[i].value.atom, strings + value_offset ) )
+ goto Bail;
+
+ FT_TRACE4(( " `%s'\n", properties[i].value.atom ));
+ }
+ else
+ {
+ properties[i].value.l = props[i].value;
+
+ FT_TRACE4(( " %d\n", properties[i].value.l ));
+ }
+ }
+
+ error = PCF_Err_Ok;
+
+ Bail:
+ FT_FREE( props );
+ FT_FREE( strings );
+
+ return error;
+ }
+
+
+ static FT_Error
+ pcf_get_metrics( FT_Stream stream,
+ PCF_Face face )
+ {
+ FT_Error error = PCF_Err_Ok;
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_ULong format, size;
+ PCF_Metric metrics = 0;
+ FT_ULong nmetrics, i;
+
+
+ error = pcf_seek_to_table_type( stream,
+ face->toc.tables,
+ face->toc.count,
+ PCF_METRICS,
+ &format,
+ &size );
+ if ( error )
+ return error;
+
+ if ( FT_READ_ULONG_LE( format ) )
+ goto Bail;
+
+ if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) &&
+ !PCF_FORMAT_MATCH( format, PCF_COMPRESSED_METRICS ) )
+ return PCF_Err_Invalid_File_Format;
+
+ if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_ULONG( nmetrics );
+ else
+ (void)FT_READ_ULONG_LE( nmetrics );
+ }
+ else
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_USHORT( nmetrics );
+ else
+ (void)FT_READ_USHORT_LE( nmetrics );
+ }
+ if ( error )
+ return PCF_Err_Invalid_File_Format;
+
+ face->nmetrics = nmetrics;
+
+ if ( !nmetrics )
+ return PCF_Err_Invalid_Table;
+
+ FT_TRACE4(( "pcf_get_metrics:\n" ));
+
+ FT_TRACE4(( " number of metrics: %d\n", nmetrics ));
+
+ /* rough estimate */
+ if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ {
+ if ( nmetrics > size / PCF_METRIC_SIZE )
+ return PCF_Err_Invalid_Table;
+ }
+ else
+ {
+ if ( nmetrics > size / PCF_COMPRESSED_METRIC_SIZE )
+ return PCF_Err_Invalid_Table;
+ }
+
+ if ( FT_NEW_ARRAY( face->metrics, nmetrics ) )
+ return PCF_Err_Out_Of_Memory;
+
+ metrics = face->metrics;
+ for ( i = 0; i < nmetrics; i++ )
+ {
+ error = pcf_get_metric( stream, format, metrics + i );
+
+ metrics[i].bits = 0;
+
+ FT_TRACE5(( " idx %d: width=%d, "
+ "lsb=%d, rsb=%d, ascent=%d, descent=%d, swidth=%d\n",
+ i,
+ ( metrics + i )->characterWidth,
+ ( metrics + i )->leftSideBearing,
+ ( metrics + i )->rightSideBearing,
+ ( metrics + i )->ascent,
+ ( metrics + i )->descent,
+ ( metrics + i )->attributes ));
+
+ if ( error )
+ break;
+ }
+
+ if ( error )
+ FT_FREE( face->metrics );
+
+ Bail:
+ return error;
+ }
+
+
+ static FT_Error
+ pcf_get_bitmaps( FT_Stream stream,
+ PCF_Face face )
+ {
+ FT_Error error = PCF_Err_Ok;
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_Long* offsets;
+ FT_Long bitmapSizes[GLYPHPADOPTIONS];
+ FT_ULong format, size;
+ FT_ULong nbitmaps, i, sizebitmaps = 0;
+
+
+ error = pcf_seek_to_table_type( stream,
+ face->toc.tables,
+ face->toc.count,
+ PCF_BITMAPS,
+ &format,
+ &size );
+ if ( error )
+ return error;
+
+ error = FT_Stream_EnterFrame( stream, 8 );
+ if ( error )
+ return error;
+
+ format = FT_GET_ULONG_LE();
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ nbitmaps = FT_GET_ULONG();
+ else
+ nbitmaps = FT_GET_ULONG_LE();
+
+ FT_Stream_ExitFrame( stream );
+
+ if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ return PCF_Err_Invalid_File_Format;
+
+ FT_TRACE4(( "pcf_get_bitmaps:\n" ));
+
+ FT_TRACE4(( " number of bitmaps: %d\n", nbitmaps ));
+
+ /* XXX: PCF_Face->nmetrics is singed FT_Long, see pcf.h */
+ if ( face->nmetrics < 0 || nbitmaps != ( FT_ULong )face->nmetrics )
+ return PCF_Err_Invalid_File_Format;
+
+ if ( FT_NEW_ARRAY( offsets, nbitmaps ) )
+ return error;
+
+ for ( i = 0; i < nbitmaps; i++ )
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_LONG( offsets[i] );
+ else
+ (void)FT_READ_LONG_LE( offsets[i] );
+
+ FT_TRACE5(( " bitmap %d: offset %ld (0x%lX)\n",
+ i, offsets[i], offsets[i] ));
+ }
+ if ( error )
+ goto Bail;
+
+ for ( i = 0; i < GLYPHPADOPTIONS; i++ )
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ (void)FT_READ_LONG( bitmapSizes[i] );
+ else
+ (void)FT_READ_LONG_LE( bitmapSizes[i] );
+ if ( error )
+ goto Bail;
+
+ sizebitmaps = bitmapSizes[PCF_GLYPH_PAD_INDEX( format )];
+
+ FT_TRACE4(( " padding %d implies a size of %ld\n", i, bitmapSizes[i] ));
+ }
+
+ FT_TRACE4(( " %d bitmaps, padding index %ld\n",
+ nbitmaps,
+ PCF_GLYPH_PAD_INDEX( format ) ));
+ FT_TRACE4(( " bitmap size = %d\n", sizebitmaps ));
+
+ FT_UNUSED( sizebitmaps ); /* only used for debugging */
+
+ for ( i = 0; i < nbitmaps; i++ )
+ {
+ /* rough estimate */
+ if ( ( offsets[i] < 0 ) ||
+ ( (FT_ULong)offsets[i] > size ) )
+ {
+ FT_TRACE0(( "pcf_get_bitmaps:"
+ " invalid offset to bitmap data of glyph %d\n", i ));
+ }
+ else
+ face->metrics[i].bits = stream->pos + offsets[i];
+ }
+
+ face->bitmapsFormat = format;
+
+ Bail:
+ FT_FREE( offsets );
+ return error;
+ }
+
+
+ static FT_Error
+ pcf_get_encodings( FT_Stream stream,
+ PCF_Face face )
+ {
+ FT_Error error = PCF_Err_Ok;
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_ULong format, size;
+ int firstCol, lastCol;
+ int firstRow, lastRow;
+ int nencoding, encodingOffset;
+ int i, j;
+ PCF_Encoding tmpEncoding, encoding = 0;
+
+
+ error = pcf_seek_to_table_type( stream,
+ face->toc.tables,
+ face->toc.count,
+ PCF_BDF_ENCODINGS,
+ &format,
+ &size );
+ if ( error )
+ return error;
+
+ error = FT_Stream_EnterFrame( stream, 14 );
+ if ( error )
+ return error;
+
+ format = FT_GET_ULONG_LE();
+
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ {
+ firstCol = FT_GET_SHORT();
+ lastCol = FT_GET_SHORT();
+ firstRow = FT_GET_SHORT();
+ lastRow = FT_GET_SHORT();
+ face->defaultChar = FT_GET_SHORT();
+ }
+ else
+ {
+ firstCol = FT_GET_SHORT_LE();
+ lastCol = FT_GET_SHORT_LE();
+ firstRow = FT_GET_SHORT_LE();
+ lastRow = FT_GET_SHORT_LE();
+ face->defaultChar = FT_GET_SHORT_LE();
+ }
+
+ FT_Stream_ExitFrame( stream );
+
+ if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
+ return PCF_Err_Invalid_File_Format;
+
+ FT_TRACE4(( "pdf_get_encodings:\n" ));
+
+ FT_TRACE4(( " firstCol %d, lastCol %d, firstRow %d, lastRow %d\n",
+ firstCol, lastCol, firstRow, lastRow ));
+
+ nencoding = ( lastCol - firstCol + 1 ) * ( lastRow - firstRow + 1 );
+
+ if ( FT_NEW_ARRAY( tmpEncoding, nencoding ) )
+ return PCF_Err_Out_Of_Memory;
+
+ error = FT_Stream_EnterFrame( stream, 2 * nencoding );
+ if ( error )
+ goto Bail;
+
+ for ( i = 0, j = 0 ; i < nencoding; i++ )
+ {
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ encodingOffset = FT_GET_SHORT();
+ else
+ encodingOffset = FT_GET_SHORT_LE();
+
+ if ( encodingOffset != -1 )
+ {
+ tmpEncoding[j].enc = ( ( ( i / ( lastCol - firstCol + 1 ) ) +
+ firstRow ) * 256 ) +
+ ( ( i % ( lastCol - firstCol + 1 ) ) +
+ firstCol );
+
+ tmpEncoding[j].glyph = (FT_Short)encodingOffset;
+
+ FT_TRACE5(( " code %d (0x%04X): idx %d\n",
+ tmpEncoding[j].enc, tmpEncoding[j].enc,
+ tmpEncoding[j].glyph ));
+
+ j++;
+ }
+ }
+ FT_Stream_ExitFrame( stream );
+
+ if ( FT_NEW_ARRAY( encoding, j ) )
+ goto Bail;
+
+ for ( i = 0; i < j; i++ )
+ {
+ encoding[i].enc = tmpEncoding[i].enc;
+ encoding[i].glyph = tmpEncoding[i].glyph;
+ }
+
+ face->nencodings = j;
+ face->encodings = encoding;
+ FT_FREE( tmpEncoding );
+
+ return error;
+
+ Bail:
+ FT_FREE( encoding );
+ FT_FREE( tmpEncoding );
+ return error;
+ }
+
+
+ static
+ const FT_Frame_Field pcf_accel_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_AccelRec
+
+ FT_FRAME_START( 20 ),
+ FT_FRAME_BYTE ( noOverlap ),
+ FT_FRAME_BYTE ( constantMetrics ),
+ FT_FRAME_BYTE ( terminalFont ),
+ FT_FRAME_BYTE ( constantWidth ),
+ FT_FRAME_BYTE ( inkInside ),
+ FT_FRAME_BYTE ( inkMetrics ),
+ FT_FRAME_BYTE ( drawDirection ),
+ FT_FRAME_SKIP_BYTES( 1 ),
+ FT_FRAME_LONG_LE ( fontAscent ),
+ FT_FRAME_LONG_LE ( fontDescent ),
+ FT_FRAME_LONG_LE ( maxOverlap ),
+ FT_FRAME_END
+ };
+
+
+ static
+ const FT_Frame_Field pcf_accel_msb_header[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PCF_AccelRec
+
+ FT_FRAME_START( 20 ),
+ FT_FRAME_BYTE ( noOverlap ),
+ FT_FRAME_BYTE ( constantMetrics ),
+ FT_FRAME_BYTE ( terminalFont ),
+ FT_FRAME_BYTE ( constantWidth ),
+ FT_FRAME_BYTE ( inkInside ),
+ FT_FRAME_BYTE ( inkMetrics ),
+ FT_FRAME_BYTE ( drawDirection ),
+ FT_FRAME_SKIP_BYTES( 1 ),
+ FT_FRAME_LONG ( fontAscent ),
+ FT_FRAME_LONG ( fontDescent ),
+ FT_FRAME_LONG ( maxOverlap ),
+ FT_FRAME_END
+ };
+
+
+ static FT_Error
+ pcf_get_accel( FT_Stream stream,
+ PCF_Face face,
+ FT_ULong type )
+ {
+ FT_ULong format, size;
+ FT_Error error = PCF_Err_Ok;
+ PCF_Accel accel = &face->accel;
+
+
+ error = pcf_seek_to_table_type( stream,
+ face->toc.tables,
+ face->toc.count,
+ type,
+ &format,
+ &size );
+ if ( error )
+ goto Bail;
+
+ if ( FT_READ_ULONG_LE( format ) )
+ goto Bail;
+
+ if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) &&
+ !PCF_FORMAT_MATCH( format, PCF_ACCEL_W_INKBOUNDS ) )
+ goto Bail;
+
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ {
+ if ( FT_STREAM_READ_FIELDS( pcf_accel_msb_header, accel ) )
+ goto Bail;
+ }
+ else
+ {
+ if ( FT_STREAM_READ_FIELDS( pcf_accel_header, accel ) )
+ goto Bail;
+ }
+
+ error = pcf_get_metric( stream,
+ format & ( ~PCF_FORMAT_MASK ),
+ &(accel->minbounds) );
+ if ( error )
+ goto Bail;
+
+ error = pcf_get_metric( stream,
+ format & ( ~PCF_FORMAT_MASK ),
+ &(accel->maxbounds) );
+ if ( error )
+ goto Bail;
+
+ if ( PCF_FORMAT_MATCH( format, PCF_ACCEL_W_INKBOUNDS ) )
+ {
+ error = pcf_get_metric( stream,
+ format & ( ~PCF_FORMAT_MASK ),
+ &(accel->ink_minbounds) );
+ if ( error )
+ goto Bail;
+
+ error = pcf_get_metric( stream,
+ format & ( ~PCF_FORMAT_MASK ),
+ &(accel->ink_maxbounds) );
+ if ( error )
+ goto Bail;
+ }
+ else
+ {
+ accel->ink_minbounds = accel->minbounds; /* I'm not sure about this */
+ accel->ink_maxbounds = accel->maxbounds;
+ }
+
+ Bail:
+ return error;
+ }
+
+
+ static FT_Error
+ pcf_interpret_style( PCF_Face pcf )
+ {
+ FT_Error error = PCF_Err_Ok;
+ FT_Face face = FT_FACE( pcf );
+ FT_Memory memory = face->memory;
+
+ PCF_Property prop;
+
+ size_t nn, len;
+ char* strings[4] = { NULL, NULL, NULL, NULL };
+ size_t lengths[4];
+
+
+ face->style_flags = 0;
+
+ prop = pcf_find_property( pcf, "SLANT" );
+ if ( prop && prop->isString &&
+ ( *(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' ) ? (char *)"Oblique"
+ : (char *)"Italic";
+ }
+
+ prop = pcf_find_property( pcf, "WEIGHT_NAME" );
+ if ( prop && prop->isString &&
+ ( *(prop->value.atom) == 'B' || *(prop->value.atom) == 'b' ) )
+ {
+ face->style_flags |= FT_STYLE_FLAG_BOLD;
+ strings[1] = (char *)"Bold";
+ }
+
+ prop = pcf_find_property( pcf, "SETWIDTH_NAME" );
+ if ( prop && prop->isString &&
+ *(prop->value.atom) &&
+ !( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
+ strings[3] = (char *)(prop->value.atom);
+
+ prop = pcf_find_property( pcf, "ADD_STYLE_NAME" );
+ if ( prop && prop->isString &&
+ *(prop->value.atom) &&
+ !( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
+ strings[0] = (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] = (char *)"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++ )
+ {
+ char* src = strings[nn];
+
+
+ len = lengths[nn];
+
+ if ( src == NULL )
+ 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_LOCAL_DEF( FT_Error )
+ pcf_load_font( FT_Stream stream,
+ PCF_Face face )
+ {
+ FT_Error error = PCF_Err_Ok;
+ FT_Memory memory = FT_FACE(face)->memory;
+ FT_Bool hasBDFAccelerators;
+
+
+ error = pcf_read_TOC( stream, face );
+ if ( error )
+ goto Exit;
+
+ error = pcf_get_properties( stream, face );
+ if ( error )
+ goto Exit;
+
+ /* Use the old accelerators if no BDF accelerators are in the file. */
+ hasBDFAccelerators = pcf_has_table_type( face->toc.tables,
+ face->toc.count,
+ PCF_BDF_ACCELERATORS );
+ if ( !hasBDFAccelerators )
+ {
+ error = pcf_get_accel( stream, face, PCF_ACCELERATORS );
+ if ( error )
+ goto Exit;
+ }
+
+ /* metrics */
+ error = pcf_get_metrics( stream, face );
+ if ( error )
+ goto Exit;
+
+ /* bitmaps */
+ error = pcf_get_bitmaps( stream, face );
+ if ( error )
+ goto Exit;
+
+ /* encodings */
+ error = pcf_get_encodings( stream, face );
+ if ( error )
+ goto Exit;
+
+ /* BDF style accelerators (i.e. bounds based on encoded glyphs) */
+ if ( hasBDFAccelerators )
+ {
+ error = pcf_get_accel( stream, face, PCF_BDF_ACCELERATORS );
+ if ( error )
+ goto Exit;
+ }
+
+ /* XXX: TO DO: inkmetrics and glyph_names are missing */
+
+ /* now construct the face object */
+ {
+ FT_Face root = FT_FACE( face );
+ PCF_Property prop;
+
+
+ root->num_faces = 1;
+ root->face_index = 0;
+ root->face_flags = FT_FACE_FLAG_FIXED_SIZES |
+ FT_FACE_FLAG_HORIZONTAL |
+ FT_FACE_FLAG_FAST_GLYPHS;
+
+ if ( face->accel.constantWidth )
+ root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
+
+ if ( ( error = pcf_interpret_style( face ) ) != 0 )
+ goto Exit;
+
+ prop = pcf_find_property( face, "FAMILY_NAME" );
+ if ( prop && prop->isString )
+ {
+ if ( FT_STRDUP( root->family_name, prop->value.atom ) )
+ goto Exit;
+ }
+ else
+ root->family_name = NULL;
+
+ /*
+ * Note: We shift all glyph indices by +1 since we must
+ * respect the convention that glyph 0 always corresponds
+ * to the `missing glyph'.
+ *
+ * This implies bumping the number of `available' glyphs by 1.
+ */
+ root->num_glyphs = face->nmetrics + 1;
+
+ root->num_fixed_sizes = 1;
+ if ( FT_NEW_ARRAY( root->available_sizes, 1 ) )
+ goto Exit;
+
+ {
+ FT_Bitmap_Size* bsize = root->available_sizes;
+ FT_Short resolution_x = 0, resolution_y = 0;
+
+
+ FT_MEM_ZERO( bsize, sizeof ( FT_Bitmap_Size ) );
+
+#if 0
+ bsize->height = face->accel.maxbounds.ascent << 6;
+#endif
+ bsize->height = (FT_Short)( face->accel.fontAscent +
+ face->accel.fontDescent );
+
+ prop = pcf_find_property( face, "AVERAGE_WIDTH" );
+ if ( prop )
+ bsize->width = (FT_Short)( ( prop->value.l + 5 ) / 10 );
+ else
+ bsize->width = (FT_Short)( bsize->height * 2/3 );
+
+ prop = pcf_find_property( face, "POINT_SIZE" );
+ if ( prop )
+ /* convert from 722.7 decipoints to 72 points per inch */
+ bsize->size =
+ (FT_Pos)( ( prop->value.l * 64 * 7200 + 36135L ) / 72270L );
+
+ prop = pcf_find_property( face, "PIXEL_SIZE" );
+ if ( prop )
+ bsize->y_ppem = (FT_Short)prop->value.l << 6;
+
+ prop = pcf_find_property( face, "RESOLUTION_X" );
+ if ( prop )
+ resolution_x = (FT_Short)prop->value.l;
+
+ prop = pcf_find_property( face, "RESOLUTION_Y" );
+ if ( prop )
+ resolution_y = (FT_Short)prop->value.l;
+
+ if ( bsize->y_ppem == 0 )
+ {
+ bsize->y_ppem = bsize->size;
+ if ( resolution_y )
+ bsize->y_ppem = bsize->y_ppem * resolution_y / 72;
+ }
+ if ( resolution_x && resolution_y )
+ bsize->x_ppem = bsize->y_ppem * resolution_x / resolution_y;
+ else
+ bsize->x_ppem = bsize->y_ppem;
+ }
+
+ /* set up charset */
+ {
+ PCF_Property charset_registry = 0, charset_encoding = 0;
+
+
+ charset_registry = pcf_find_property( face, "CHARSET_REGISTRY" );
+ charset_encoding = pcf_find_property( face, "CHARSET_ENCODING" );
+
+ if ( charset_registry && charset_registry->isString &&
+ charset_encoding && charset_encoding->isString )
+ {
+ if ( FT_STRDUP( face->charset_encoding,
+ charset_encoding->value.atom ) ||
+ FT_STRDUP( face->charset_registry,
+ charset_registry->value.atom ) )
+ goto Exit;
+ }
+ }
+ }
+
+ Exit:
+ if ( error )
+ {
+ /* This is done to respect the behaviour of the original */
+ /* PCF font driver. */
+ error = PCF_Err_Invalid_File_Format;
+ }
+
+ return error;
+ }
+
+
+/* END */