| /* pcfdriver.c |
| |
| FreeType font driver for pcf files |
| |
| Copyright (C) 2000-2001 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 "pcfdriver.h" |
| #include "pcfutil.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_pcfdriver |
| |
| |
| static FT_Error |
| PCF_Face_Done( PCF_Face face ) |
| { |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| FREE( face->encodings ); |
| FREE( face->metrics ); |
| |
| /* free properties */ |
| { |
| PCF_Property prop = face->properties; |
| FT_Int i; |
| |
| for ( i = 0; i < face->nprops; i++ ) |
| { |
| prop = &face->properties[i]; |
| |
| FREE( prop->name ); |
| if ( prop->isString ) |
| FREE( prop->value ); |
| } |
| |
| FREE( face->properties ); |
| } |
| |
| FREE( face->toc.tables ); |
| FREE( face->root.family_name ); |
| FREE( face->root.available_sizes ); |
| FREE( face->charset_encoding ); |
| FREE( face->charset_registry ); |
| |
| FT_TRACE4(( "DONE_FACE!!!\n" )); |
| |
| return PCF_Err_Ok; |
| } |
| |
| |
| static FT_Error |
| PCF_Face_Init( FT_Stream stream, |
| PCF_Face face, |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ) |
| { |
| 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 ) |
| goto Fail; |
| |
| return PCF_Err_Ok; |
| |
| Fail: |
| FT_TRACE2(( "[not a valid PCF file]\n" )); |
| PCF_Face_Done( face ); |
| |
| return PCF_Err_Unknown_File_Format; /* error */ |
| } |
| |
| |
| static FT_Error |
| PCF_Set_Pixel_Size( FT_Size size ) |
| { |
| PCF_Face face = (PCF_Face)FT_SIZE_FACE( size ); |
| |
| |
| FT_TRACE4(( "rec %d - pres %d\n", size->metrics.y_ppem, |
| face->root.available_sizes->height )); |
| |
| if ( size->metrics.y_ppem == face->root.available_sizes->height ) |
| { |
| size->metrics.ascender = face->accel.fontAscent << 6; |
| size->metrics.descender = face->accel.fontDescent * (-64); |
| #if 0 |
| size->metrics.height = face->accel.maxbounds.ascent << 6; |
| #endif |
| size->metrics.height = size->metrics.ascender - |
| size->metrics.descender; |
| |
| size->metrics.max_advance = face->accel.maxbounds.characterWidth << 6; |
| |
| return PCF_Err_Ok; |
| } |
| else |
| { |
| FT_TRACE4(( "size WRONG\n" )); |
| return PCF_Err_Invalid_Pixel_Size; |
| } |
| } |
| |
| |
| static FT_Error |
| PCF_Glyph_Load( FT_GlyphSlot slot, |
| FT_Size size, |
| FT_UInt glyph_index, |
| FT_Int load_flags ) |
| { |
| PCF_Face face = (PCF_Face)FT_SIZE_FACE( size ); |
| FT_Stream stream = face->root.stream; |
| FT_Error error = PCF_Err_Ok; |
| FT_Memory memory = FT_FACE(face)->memory; |
| FT_Bitmap* bitmap = &slot->bitmap; |
| PCF_Metric metric; |
| int bytes; |
| |
| |
| FT_UNUSED( load_flags ); |
| |
| |
| FT_TRACE4(( "load_glyph %d ---", glyph_index )); |
| |
| if ( !face ) |
| { |
| error = PCF_Err_Invalid_Argument; |
| goto Exit; |
| } |
| |
| 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; |
| |
| if ( ALLOC( bitmap->buffer, bytes ) ) |
| 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->bitmap_left = metric->leftSideBearing; |
| slot->bitmap_top = metric->ascent; |
| |
| slot->metrics.horiAdvance = metric->characterWidth << 6 ; |
| slot->metrics.horiBearingX = metric->rightSideBearing << 6 ; |
| slot->metrics.horiBearingY = metric->ascent << 6 ; |
| slot->metrics.width = metric->characterWidth << 6 ; |
| slot->metrics.height = bitmap->rows << 6; |
| |
| slot->linearHoriAdvance = (FT_Fixed)bitmap->width << 16; |
| slot->format = ft_glyph_format_bitmap; |
| slot->flags = FT_GLYPH_OWN_BITMAP; |
| |
| FT_TRACE4(( " --- ok\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static FT_UInt |
| PCF_Char_Get_Index( FT_CharMap charmap, |
| FT_Long char_code ) |
| { |
| PCF_Face face = (PCF_Face)charmap->face; |
| PCF_Encoding en_table = face->encodings; |
| int low, high, mid; |
| |
| |
| FT_TRACE4(( "get_char_index %ld\n", char_code )); |
| |
| low = 0; |
| high = face->nencodings - 1; |
| while ( low <= high ) |
| { |
| mid = ( low + high ) / 2; |
| if ( char_code < en_table[mid].enc ) |
| high = mid - 1; |
| else if ( char_code > en_table[mid].enc ) |
| low = mid + 1; |
| else |
| return en_table[mid].glyph; |
| } |
| |
| return 0; |
| } |
| |
| |
| static FT_Long |
| PCF_Char_Get_Next( FT_CharMap charmap, |
| FT_Long char_code ) |
| { |
| PCF_Face face = (PCF_Face)charmap->face; |
| PCF_Encoding en_table = face->encodings; |
| int low, high, mid; |
| |
| |
| FT_TRACE4(( "get_next_char %ld\n", char_code )); |
| |
| char_code++; |
| low = 0; |
| high = face->nencodings - 1; |
| |
| while ( low <= high ) |
| { |
| mid = ( low + high ) / 2; |
| if ( char_code < en_table[mid].enc ) |
| high = mid - 1; |
| else if ( char_code > en_table[mid].enc ) |
| low = mid + 1; |
| else |
| return char_code; |
| } |
| |
| if ( high < 0 ) |
| high = 0; |
| |
| while ( high < face->nencodings ) |
| { |
| if ( en_table[high].enc >= char_code ) |
| return en_table[high].enc; |
| high++; |
| } |
| |
| return 0; |
| } |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_Driver_ClassRec pcf_driver_class = |
| { |
| { |
| ft_module_font_driver, |
| sizeof ( FT_DriverRec ), |
| |
| "pcf", |
| 0x10000L, |
| 0x20000L, |
| |
| 0, |
| |
| (FT_Module_Constructor)0, |
| (FT_Module_Destructor) 0, |
| (FT_Module_Requester) 0 |
| }, |
| |
| sizeof( PCF_FaceRec ), |
| sizeof( FT_SizeRec ), |
| sizeof( FT_GlyphSlotRec ), |
| |
| (FT_Face_InitFunc) PCF_Face_Init, |
| (FT_Face_DoneFunc) PCF_Face_Done, |
| (FT_Size_InitFunc) 0, |
| (FT_Size_DoneFunc) 0, |
| (FT_Slot_InitFunc)0, |
| (FT_Slot_DoneFunc)0, |
| |
| (FT_Size_ResetPointsFunc) PCF_Set_Pixel_Size, |
| (FT_Size_ResetPixelsFunc)PCF_Set_Pixel_Size, |
| |
| (FT_Slot_LoadFunc) PCF_Glyph_Load, |
| (FT_CharMap_CharIndexFunc) PCF_Char_Get_Index, |
| |
| (FT_Face_GetKerningFunc) 0, |
| (FT_Face_AttachFunc) 0, |
| (FT_Face_GetAdvancesFunc) 0, |
| |
| (FT_CharMap_CharNextFunc) PCF_Char_Get_Next, |
| }; |
| |
| |
| #ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* getDriverClass */ |
| /* */ |
| /* <Description> */ |
| /* This function is used when compiling the TrueType driver as a */ |
| /* shared library (`.DLL' or `.so'). It will be used by the */ |
| /* high-level library of FreeType to retrieve the address of the */ |
| /* driver's generic interface. */ |
| /* */ |
| /* It shouldn't be implemented in a static build, as each driver must */ |
| /* have the same function as an exported entry point. */ |
| /* */ |
| /* <Return> */ |
| /* The address of the TrueType's driver generic interface. The */ |
| /* format-specific interface can then be retrieved through the method */ |
| /* interface->get_format_interface. */ |
| /* */ |
| FT_EXPORT_DEF( const FT_Driver_Class ) |
| getDriverClass( void ) |
| { |
| return &pcf_driver_class; |
| } |
| |
| |
| #endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */ |
| |
| |
| /* END */ |