| /* pcfdrivr.c |
| |
| FreeType font driver for pcf files |
| |
| Copyright (C) 2000, 2001, 2002, 2003, 2004, 2006 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_ERRORS_H |
| #include FT_BDF_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_XFREE86_NAME_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_UInt 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 = (FT_UInt)face->nencodings; |
| cmap->encodings = face->encodings; |
| |
| return PCF_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_UInt min, max, mid; |
| FT_UInt result = 0; |
| |
| |
| min = 0; |
| max = cmap->num_encodings; |
| |
| while ( min < max ) |
| { |
| FT_UInt32 code; |
| |
| |
| mid = ( min + max ) >> 1; |
| code = 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_UInt min, max, mid; |
| FT_UInt32 charcode = *acharcode + 1; |
| FT_UInt result = 0; |
| |
| |
| min = 0; |
| max = cmap->num_encodings; |
| |
| while ( min < max ) |
| { |
| FT_UInt32 code; |
| |
| |
| mid = ( min + max ) >> 1; |
| code = 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 = encodings[min].enc; |
| result = encodings[min].glyph + 1; |
| } |
| |
| Exit: |
| *acharcode = charcode; |
| return result; |
| } |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_CMap_ClassRec pcf_cmap_class = |
| { |
| sizeof ( PCF_CMapRec ), |
| pcf_cmap_init, |
| pcf_cmap_done, |
| pcf_cmap_char_index, |
| pcf_cmap_char_next |
| }; |
| |
| |
| FT_CALLBACK_DEF( void ) |
| PCF_Face_Done( FT_Face pcfface ) /* PCF_Face */ |
| { |
| PCF_Face face = (PCF_Face)pcfface; |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| FT_FREE( face->encodings ); |
| FT_FREE( face->metrics ); |
| |
| /* free properties */ |
| { |
| PCF_Property prop; |
| FT_Int i; |
| |
| |
| if ( face->properties ) |
| { |
| for ( i = 0; i < face->nprops; i++ ) |
| { |
| 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 ); |
| |
| FT_TRACE4(( "PCF_Face_Done: done face\n" )); |
| |
| /* close gzip/LZW stream if any */ |
| if ( pcfface->stream == &face->gzip_stream ) |
| { |
| FT_Stream_Close( &face->gzip_stream ); |
| pcfface->stream = face->gzip_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 = PCF_Err_Ok; |
| |
| FT_UNUSED( num_params ); |
| FT_UNUSED( params ); |
| FT_UNUSED( face_index ); |
| |
| |
| error = pcf_load_font( stream, face ); |
| if ( error ) |
| { |
| FT_Error error2; |
| |
| |
| PCF_Face_Done( pcfface ); |
| |
| /* this didn't work, try gzip support! */ |
| error2 = FT_Stream_OpenGzip( &face->gzip_stream, stream ); |
| if ( FT_ERROR_BASE( error2 ) == FT_Err_Unimplemented_Feature ) |
| goto Fail; |
| |
| error = error2; |
| if ( error ) |
| { |
| FT_Error error3; |
| |
| |
| /* this didn't work, try LZW support! */ |
| error3 = FT_Stream_OpenLZW( &face->gzip_stream, stream ); |
| if ( FT_ERROR_BASE( error3 ) == FT_Err_Unimplemented_Feature ) |
| goto Fail; |
| |
| error = error3; |
| if ( error ) |
| goto Fail; |
| |
| face->gzip_source = stream; |
| pcfface->stream = &face->gzip_stream; |
| |
| stream = pcfface->stream; |
| |
| error = pcf_load_font( stream, face ); |
| if ( error ) |
| goto Fail; |
| } |
| else |
| { |
| face->gzip_source = stream; |
| pcfface->stream = &face->gzip_stream; |
| |
| stream = pcfface->stream; |
| |
| error = pcf_load_font( stream, face ); |
| if ( error ) |
| goto Fail; |
| } |
| } |
| |
| /* 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; |
| charmap.platform_id = 0; |
| charmap.encoding_id = 0; |
| |
| if ( unicode_charmap ) |
| { |
| charmap.encoding = FT_ENCODING_UNICODE; |
| charmap.platform_id = 3; |
| charmap.encoding_id = 1; |
| } |
| |
| 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 valid PCF file]\n" )); |
| PCF_Face_Done( pcfface ); |
| error = PCF_Err_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 << 6; |
| size->metrics.descender = -accel->fontDescent << 6; |
| size->metrics.max_advance = accel->maxbounds.characterWidth << 6; |
| |
| return PCF_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 = PCF_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 = PCF_Err_Ok; |
| break; |
| |
| case FT_SIZE_REQUEST_TYPE_REAL_DIM: |
| if ( height == ( face->accel.fontAscent + |
| face->accel.fontDescent ) ) |
| error = PCF_Err_Ok; |
| break; |
| |
| default: |
| error = PCF_Err_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 = face->root.stream; |
| FT_Error error = PCF_Err_Ok; |
| FT_Bitmap* bitmap = &slot->bitmap; |
| PCF_Metric metric; |
| int bytes; |
| |
| FT_UNUSED( load_flags ); |
| |
| |
| FT_TRACE4(( "load_glyph %d ---", glyph_index )); |
| |
| if ( !face || glyph_index >= (FT_UInt)face->root.num_glyphs ) |
| { |
| error = PCF_Err_Invalid_Argument; |
| goto Exit; |
| } |
| |
| if ( glyph_index > 0 ) |
| glyph_index--; |
| |
| metric = face->metrics + glyph_index; |
| |
| bitmap->rows = metric->ascent + metric->descent; |
| bitmap->width = 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 = ( bitmap->width + 7 ) >> 3; |
| break; |
| |
| case 2: |
| bitmap->pitch = ( ( bitmap->width + 15 ) >> 4 ) << 1; |
| break; |
| |
| case 4: |
| bitmap->pitch = ( ( bitmap->width + 31 ) >> 5 ) << 2; |
| break; |
| |
| case 8: |
| bitmap->pitch = ( ( bitmap->width + 63 ) >> 6 ) << 3; |
| break; |
| |
| default: |
| return PCF_Err_Invalid_File_Format; |
| } |
| |
| /* XXX: to do: are there cases that need repadding the bitmap? */ |
| bytes = bitmap->pitch * bitmap->rows; |
| |
| error = ft_glyphslot_alloc_bitmap( slot, 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 = metric->characterWidth << 6; |
| slot->metrics.horiBearingX = metric->leftSideBearing << 6; |
| slot->metrics.horiBearingY = metric->ascent << 6; |
| slot->metrics.width = ( metric->rightSideBearing - |
| metric->leftSideBearing ) << 6; |
| slot->metrics.height = bitmap->rows << 6; |
| |
| ft_synthesize_vertical_metrics( &slot->metrics, |
| ( face->accel.fontAscent + |
| face->accel.fontDescent ) << 6 ); |
| |
| FT_TRACE4(( " --- ok\n" )); |
| |
| 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 |
| { |
| /* 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 = prop->value.integer; |
| } |
| return 0; |
| } |
| |
| return PCF_Err_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_XF86_NAME, FT_XF86_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, |
| 0, |
| 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 */ |
| |
| #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
| ft_stub_set_char_sizes, |
| ft_stub_set_pixel_sizes, |
| #endif |
| PCF_Glyph_Load, |
| |
| 0, /* FT_Face_GetKerningFunc */ |
| 0, /* FT_Face_AttachFunc */ |
| 0, /* FT_Face_GetAdvancesFunc */ |
| |
| PCF_Size_Request, |
| PCF_Size_Select |
| }; |
| |
| |
| /* END */ |
