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-rw-r--r--src/cid/cidload.c644
1 files changed, 644 insertions, 0 deletions
diff --git a/src/cid/cidload.c b/src/cid/cidload.c
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+++ b/src/cid/cidload.c
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+/***************************************************************************/
+/* */
+/* cidload.c */
+/* */
+/* CID-keyed Type1 font loader (body). */
+/* */
+/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 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 <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_CONFIG_CONFIG_H
+#include FT_MULTIPLE_MASTERS_H
+#include FT_INTERNAL_TYPE1_TYPES_H
+
+#include "cidload.h"
+
+#include "ciderrs.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_cidload
+
+
+ /* read a single offset */
+ FT_LOCAL_DEF( FT_Long )
+ cid_get_offset( FT_Byte* *start,
+ FT_Byte offsize )
+ {
+ FT_Long result;
+ FT_Byte* p = *start;
+
+
+ for ( result = 0; offsize > 0; offsize-- )
+ {
+ result <<= 8;
+ result |= *p++;
+ }
+
+ *start = p;
+ return result;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** TYPE 1 SYMBOL PARSING *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+
+ static FT_Error
+ cid_load_keyword( CID_Face face,
+ CID_Loader* loader,
+ const T1_Field keyword )
+ {
+ FT_Error error;
+ CID_Parser* parser = &loader->parser;
+ FT_Byte* object;
+ void* dummy_object;
+ CID_FaceInfo cid = &face->cid;
+
+
+ /* if the keyword has a dedicated callback, call it */
+ if ( keyword->type == T1_FIELD_TYPE_CALLBACK )
+ {
+ keyword->reader( (FT_Face)face, parser );
+ error = parser->root.error;
+ goto Exit;
+ }
+
+ /* we must now compute the address of our target object */
+ switch ( keyword->location )
+ {
+ case T1_FIELD_LOCATION_CID_INFO:
+ object = (FT_Byte*)cid;
+ break;
+
+ case T1_FIELD_LOCATION_FONT_INFO:
+ object = (FT_Byte*)&cid->font_info;
+ break;
+
+ case T1_FIELD_LOCATION_BBOX:
+ object = (FT_Byte*)&cid->font_bbox;
+ break;
+
+ default:
+ {
+ CID_FaceDict dict;
+
+
+ if ( parser->num_dict < 0 )
+ {
+ FT_ERROR(( "cid_load_keyword: invalid use of `%s'!\n",
+ keyword->ident ));
+ error = CID_Err_Syntax_Error;
+ goto Exit;
+ }
+
+ dict = cid->font_dicts + parser->num_dict;
+ switch ( keyword->location )
+ {
+ case T1_FIELD_LOCATION_PRIVATE:
+ object = (FT_Byte*)&dict->private_dict;
+ break;
+
+ default:
+ object = (FT_Byte*)dict;
+ }
+ }
+ }
+
+ dummy_object = object;
+
+ /* now, load the keyword data in the object's field(s) */
+ if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
+ keyword->type == T1_FIELD_TYPE_FIXED_ARRAY )
+ error = cid_parser_load_field_table( &loader->parser, keyword,
+ &dummy_object );
+ else
+ error = cid_parser_load_field( &loader->parser,
+ keyword, &dummy_object );
+ Exit:
+ return error;
+ }
+
+
+ FT_CALLBACK_DEF( FT_Error )
+ parse_font_matrix( CID_Face face,
+ CID_Parser* parser )
+ {
+ FT_Matrix* matrix;
+ FT_Vector* offset;
+ CID_FaceDict dict;
+ FT_Face root = (FT_Face)&face->root;
+ FT_Fixed temp[6];
+ FT_Fixed temp_scale;
+
+
+ if ( parser->num_dict >= 0 )
+ {
+ dict = face->cid.font_dicts + parser->num_dict;
+ matrix = &dict->font_matrix;
+ offset = &dict->font_offset;
+
+ (void)cid_parser_to_fixed_array( parser, 6, temp, 3 );
+
+ temp_scale = FT_ABS( temp[3] );
+
+ /* Set units per EM based on FontMatrix values. We set the value to */
+ /* `1000/temp_scale', because temp_scale was already multiplied by */
+ /* 1000 (in `t1_tofixed', from psobjs.c). */
+ root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L,
+ FT_DivFix( temp_scale, 1000 ) ) );
+
+ /* we need to scale the values by 1.0/temp[3] */
+ if ( temp_scale != 0x10000L )
+ {
+ temp[0] = FT_DivFix( temp[0], temp_scale );
+ temp[1] = FT_DivFix( temp[1], temp_scale );
+ temp[2] = FT_DivFix( temp[2], temp_scale );
+ temp[4] = FT_DivFix( temp[4], temp_scale );
+ temp[5] = FT_DivFix( temp[5], temp_scale );
+ temp[3] = 0x10000L;
+ }
+
+ matrix->xx = temp[0];
+ matrix->yx = temp[1];
+ matrix->xy = temp[2];
+ matrix->yy = temp[3];
+
+ /* note that the font offsets are expressed in integer font units */
+ offset->x = temp[4] >> 16;
+ offset->y = temp[5] >> 16;
+ }
+
+ return CID_Err_Ok; /* this is a callback function; */
+ /* we must return an error code */
+ }
+
+
+ FT_CALLBACK_DEF( FT_Error )
+ parse_fd_array( CID_Face face,
+ CID_Parser* parser )
+ {
+ CID_FaceInfo cid = &face->cid;
+ FT_Memory memory = face->root.memory;
+ FT_Error error = CID_Err_Ok;
+ FT_Long num_dicts;
+
+
+ num_dicts = cid_parser_to_int( parser );
+
+ if ( !cid->font_dicts )
+ {
+ FT_Int n;
+
+
+ if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
+ goto Exit;
+
+ cid->num_dicts = (FT_UInt)num_dicts;
+
+ /* don't forget to set a few defaults */
+ for ( n = 0; n < cid->num_dicts; n++ )
+ {
+ CID_FaceDict dict = cid->font_dicts + n;
+
+
+ /* default value for lenIV */
+ dict->private_dict.lenIV = 4;
+ }
+ }
+
+ Exit:
+ return error;
+ }
+
+
+ static
+ const T1_FieldRec cid_field_records[] =
+ {
+
+#include "cidtoken.h"
+
+ T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 )
+ T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix, 0 )
+
+ { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
+ };
+
+
+ static FT_Error
+ cid_parse_dict( CID_Face face,
+ CID_Loader* loader,
+ FT_Byte* base,
+ FT_Long size )
+ {
+ CID_Parser* parser = &loader->parser;
+
+
+ parser->root.cursor = base;
+ parser->root.limit = base + size;
+ parser->root.error = CID_Err_Ok;
+
+ {
+ FT_Byte* cur = base;
+ FT_Byte* limit = cur + size;
+
+
+ for (;;)
+ {
+ FT_Byte* newlimit;
+
+
+ parser->root.cursor = cur;
+ cid_parser_skip_spaces( parser );
+
+ if ( parser->root.cursor >= limit )
+ newlimit = limit - 1 - 17;
+ else
+ newlimit = parser->root.cursor - 17;
+
+ /* look for `%ADOBeginFontDict' */
+ for ( ; cur < newlimit; cur++ )
+ {
+ if ( *cur == '%' &&
+ ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
+ {
+ /* if /FDArray was found, then cid->num_dicts is > 0, and */
+ /* we can start increasing parser->num_dict */
+ if ( face->cid.num_dicts > 0 )
+ parser->num_dict++;
+ }
+ }
+
+ cur = parser->root.cursor;
+ /* no error can occur in cid_parser_skip_spaces */
+ if ( cur >= limit )
+ break;
+
+ cid_parser_skip_PS_token( parser );
+ if ( parser->root.cursor >= limit || parser->root.error )
+ break;
+
+ /* look for immediates */
+ if ( *cur == '/' && cur + 2 < limit )
+ {
+ FT_PtrDist len;
+
+
+ cur++;
+ len = parser->root.cursor - cur;
+
+ if ( len > 0 && len < 22 )
+ {
+ /* now compare the immediate name to the keyword table */
+ T1_Field keyword = (T1_Field)cid_field_records;
+
+
+ for (;;)
+ {
+ FT_Byte* name;
+
+
+ name = (FT_Byte*)keyword->ident;
+ if ( !name )
+ break;
+
+ if ( cur[0] == name[0] &&
+ len == (FT_PtrDist)ft_strlen( (const char*)name ) )
+ {
+ FT_PtrDist n;
+
+
+ for ( n = 1; n < len; n++ )
+ if ( cur[n] != name[n] )
+ break;
+
+ if ( n >= len )
+ {
+ /* we found it - run the parsing callback */
+ parser->root.error = cid_load_keyword( face,
+ loader,
+ keyword );
+ if ( parser->root.error )
+ return parser->root.error;
+ break;
+ }
+ }
+ keyword++;
+ }
+ }
+ }
+
+ cur = parser->root.cursor;
+ }
+ }
+ return parser->root.error;
+ }
+
+
+ /* read the subrmap and the subrs of each font dict */
+ static FT_Error
+ cid_read_subrs( CID_Face face )
+ {
+ CID_FaceInfo cid = &face->cid;
+ FT_Memory memory = face->root.memory;
+ FT_Stream stream = face->cid_stream;
+ FT_Error error;
+ FT_Int n;
+ CID_Subrs subr;
+ FT_UInt max_offsets = 0;
+ FT_ULong* offsets = 0;
+ PSAux_Service psaux = (PSAux_Service)face->psaux;
+
+
+ if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
+ goto Exit;
+
+ subr = face->subrs;
+ for ( n = 0; n < cid->num_dicts; n++, subr++ )
+ {
+ CID_FaceDict dict = cid->font_dicts + n;
+ FT_Int lenIV = dict->private_dict.lenIV;
+ FT_UInt count, num_subrs = dict->num_subrs;
+ FT_ULong data_len;
+ FT_Byte* p;
+
+
+ /* reallocate offsets array if needed */
+ if ( num_subrs + 1 > max_offsets )
+ {
+ FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 );
+
+
+ if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
+ goto Fail;
+
+ max_offsets = new_max;
+ }
+
+ /* read the subrmap's offsets */
+ if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
+ FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) )
+ goto Fail;
+
+ p = (FT_Byte*)stream->cursor;
+ for ( count = 0; count <= num_subrs; count++ )
+ offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );
+
+ FT_FRAME_EXIT();
+
+ /* now, compute the size of subrs charstrings, */
+ /* allocate, and read them */
+ data_len = offsets[num_subrs] - offsets[0];
+
+ if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
+ FT_ALLOC( subr->code[0], data_len ) )
+ goto Fail;
+
+ if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
+ FT_STREAM_READ( subr->code[0], data_len ) )
+ goto Fail;
+
+ /* set up pointers */
+ for ( count = 1; count <= num_subrs; count++ )
+ {
+ FT_ULong len;
+
+
+ len = offsets[count] - offsets[count - 1];
+ subr->code[count] = subr->code[count - 1] + len;
+ }
+
+ /* decrypt subroutines, but only if lenIV >= 0 */
+ if ( lenIV >= 0 )
+ {
+ for ( count = 0; count < num_subrs; count++ )
+ {
+ FT_ULong len;
+
+
+ len = offsets[count + 1] - offsets[count];
+ psaux->t1_decrypt( subr->code[count], len, 4330 );
+ }
+ }
+
+ subr->num_subrs = num_subrs;
+ }
+
+ Exit:
+ FT_FREE( offsets );
+ return error;
+
+ Fail:
+ if ( face->subrs )
+ {
+ for ( n = 0; n < cid->num_dicts; n++ )
+ {
+ if ( face->subrs[n].code )
+ FT_FREE( face->subrs[n].code[0] );
+
+ FT_FREE( face->subrs[n].code );
+ }
+ FT_FREE( face->subrs );
+ }
+ goto Exit;
+ }
+
+
+ static void
+ t1_init_loader( CID_Loader* loader,
+ CID_Face face )
+ {
+ FT_UNUSED( face );
+
+ FT_MEM_ZERO( loader, sizeof ( *loader ) );
+ }
+
+
+ static void
+ t1_done_loader( CID_Loader* loader )
+ {
+ CID_Parser* parser = &loader->parser;
+
+
+ /* finalize parser */
+ cid_parser_done( parser );
+ }
+
+
+ static FT_Error
+ cid_hex_to_binary( FT_Byte* data,
+ FT_Long data_len,
+ FT_ULong offset,
+ CID_Face face )
+ {
+ FT_Stream stream = face->root.stream;
+ FT_Error error;
+
+ FT_Byte buffer[256];
+ FT_Byte *p, *plimit;
+ FT_Byte *d, *dlimit;
+ FT_Byte val;
+
+ FT_Bool upper_nibble, done;
+
+
+ if ( FT_STREAM_SEEK( offset ) )
+ goto Exit;
+
+ d = data;
+ dlimit = d + data_len;
+ p = buffer;
+ plimit = p;
+
+ upper_nibble = 1;
+ done = 0;
+
+ while ( d < dlimit )
+ {
+ if ( p >= plimit )
+ {
+ FT_ULong oldpos = FT_STREAM_POS();
+ FT_ULong size = stream->size - oldpos;
+
+
+ if ( size == 0 )
+ {
+ error = CID_Err_Syntax_Error;
+ goto Exit;
+ }
+
+ if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
+ goto Exit;
+ p = buffer;
+ plimit = p + FT_STREAM_POS() - oldpos;
+ }
+
+ if ( ft_isdigit( *p ) )
+ val = (FT_Byte)( *p - '0' );
+ else if ( *p >= 'a' && *p <= 'f' )
+ val = (FT_Byte)( *p - 'a' );
+ else if ( *p >= 'A' && *p <= 'F' )
+ val = (FT_Byte)( *p - 'A' + 10 );
+ else if ( *p == ' ' ||
+ *p == '\t' ||
+ *p == '\r' ||
+ *p == '\n' ||
+ *p == '\f' ||
+ *p == '\0' )
+ {
+ p++;
+ continue;
+ }
+ else if ( *p == '>' )
+ {
+ val = 0;
+ done = 1;
+ }
+ else
+ {
+ error = CID_Err_Syntax_Error;
+ goto Exit;
+ }
+
+ if ( upper_nibble )
+ *d = (FT_Byte)( val << 4 );
+ else
+ {
+ *d = (FT_Byte)( *d + val );
+ d++;
+ }
+
+ upper_nibble = (FT_Byte)( 1 - upper_nibble );
+
+ if ( done )
+ break;
+
+ p++;
+ }
+
+ error = CID_Err_Ok;
+
+ Exit:
+ return error;
+ }
+
+
+ FT_LOCAL_DEF( FT_Error )
+ cid_face_open( CID_Face face,
+ FT_Int face_index )
+ {
+ CID_Loader loader;
+ CID_Parser* parser;
+ FT_Memory memory = face->root.memory;
+ FT_Error error;
+
+
+ t1_init_loader( &loader, face );
+
+ parser = &loader.parser;
+ error = cid_parser_new( parser, face->root.stream, face->root.memory,
+ (PSAux_Service)face->psaux );
+ if ( error )
+ goto Exit;
+
+ error = cid_parse_dict( face, &loader,
+ parser->postscript,
+ parser->postscript_len );
+ if ( error )
+ goto Exit;
+
+ if ( face_index < 0 )
+ goto Exit;
+
+ if ( FT_NEW( face->cid_stream ) )
+ goto Exit;
+
+ if ( parser->binary_length )
+ {
+ /* we must convert the data section from hexadecimal to binary */
+ if ( FT_ALLOC( face->binary_data, parser->binary_length ) ||
+ cid_hex_to_binary( face->binary_data, parser->binary_length,
+ parser->data_offset, face ) )
+ goto Exit;
+
+ FT_Stream_OpenMemory( face->cid_stream,
+ face->binary_data, parser->binary_length );
+ face->cid.data_offset = 0;
+ }
+ else
+ {
+ *face->cid_stream = *face->root.stream;
+ face->cid.data_offset = loader.parser.data_offset;
+ }
+
+ error = cid_read_subrs( face );
+
+ Exit:
+ t1_done_loader( &loader );
+ return error;
+ }
+
+
+/* END */
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