| /* pcfdriver.c |
| |
| FreeType font driver for pcf files |
| |
| Copyright (C) 2000-2001, 2002 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" |
| |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_pcfread |
| |
| |
| typedef struct PCF_CMapRec_ |
| { |
| FT_CMapRec cmap; |
| FT_UInt num_encodings; |
| PCF_Encoding encodings; |
| |
| } PCF_CMapRec, *PCF_CMap; |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| pcf_cmap_init( PCF_CMap cmap ) |
| { |
| PCF_Face face = (PCF_Face)FT_CMAP_FACE( cmap ); |
| |
| |
| cmap->num_encodings = (FT_UInt)face->nencodings; |
| cmap->encodings = face->encodings; |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| FT_CALLBACK_DEF( void ) |
| pcf_cmap_done( PCF_CMap cmap ) |
| { |
| cmap->encodings = NULL; |
| cmap->num_encodings = 0; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt ) |
| pcf_cmap_char_index( PCF_CMap cmap, |
| FT_UInt32 charcode ) |
| { |
| 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( PCF_CMap cmap, |
| FT_UInt32 *acharcode ) |
| { |
| 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 ), |
| (FT_CMap_InitFunc) pcf_cmap_init, |
| (FT_CMap_DoneFunc) pcf_cmap_done, |
| (FT_CMap_CharIndexFunc)pcf_cmap_char_index, |
| (FT_CMap_CharNextFunc) pcf_cmap_char_next |
| }; |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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 |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| PCF_Face_Done( PCF_Face face ) |
| { |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| FT_FREE( face->encodings ); |
| FT_FREE( face->metrics ); |
| |
| /* free properties */ |
| { |
| PCF_Property prop = face->properties; |
| FT_Int i; |
| |
| |
| for ( i = 0; i < face->nprops; i++ ) |
| { |
| prop = &face->properties[i]; |
| |
| FT_FREE( prop->name ); |
| if ( prop->isString ) |
| FT_FREE( prop->value ); |
| } |
| |
| FT_FREE( face->properties ); |
| } |
| |
| FT_FREE( face->toc.tables ); |
| FT_FREE( face->root.family_name ); |
| FT_FREE( face->root.available_sizes ); |
| FT_FREE( face->charset_encoding ); |
| FT_FREE( face->charset_registry ); |
| |
| FT_TRACE4(( "DONE_FACE!!!\n" )); |
| |
| return PCF_Err_Ok; |
| } |
| |
| |
| FT_CALLBACK_DEF( 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; |
| |
| /* set-up charmap */ |
| { |
| FT_String *charset_registry, *charset_encoding; |
| FT_Bool unicode_charmap = 0; |
| |
| |
| charset_registry = face->charset_registry; |
| charset_encoding = face->charset_encoding; |
| |
| if ( ( charset_registry != NULL ) && |
| ( charset_encoding != NULL ) ) |
| { |
| if ( !ft_strcmp( face->charset_registry, "ISO10646" ) || |
| ( !ft_strcmp( face->charset_registry, "ISO8859" ) && |
| !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 (face->root.num_charmaps) |
| face->root.charmap = face->root.charmaps[0]; |
| #endif |
| } |
| } |
| |
| Exit: |
| return error; |
| |
| Fail: |
| FT_TRACE2(( "[not a valid PCF file]\n" )); |
| error = PCF_Err_Unknown_File_Format; /* error */ |
| goto Exit; |
| } |
| |
| |
| 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; |
| } |
| |
| 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; |
| |
| if ( FT_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->leftSideBearing << 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; |
| } |
| |
| |
| 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_Face_GetKerningFunc) 0, |
| (FT_Face_AttachFunc) 0, |
| (FT_Face_GetAdvancesFunc) 0 |
| }; |
| |
| |
| /* END */ |