forked from minhngoc25a/freetype2
[tfm] Add tfm_driver_class functions.
Note: Does not compile. * src/tfm/tfmdrivr.c: Add TFM_Face_Done, TFM_Face_Init, TFM_Glyph_Load, TFM_Size_Request and TFM_Size_Select functions.
This commit is contained in:
Parth Wazurkar
parent
5b74836c7a
commit
f2120af34b
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@ -1,5 +1,5 @@
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#
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# FreeType 2 GF Font module definition
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# FreeType 2 TFM Font module definition
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#
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@ -134,7 +134,18 @@
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FT_CALLBACK_DEF( void )
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TFM_Face_Done( FT_Face tfmface ) /* TFM_Face */
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{
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/* TO-DO */
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TFM_Face face = (TFM_Face)face;
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FT_Memory memory;
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if ( !face )
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return;
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memory = FT_FACE_MEMORY( face );
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tfm_free_font( face );
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FT_FREE( tfmface->available_sizes );
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}
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@ -145,21 +156,156 @@
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FT_Int num_params,
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FT_Parameter* params )
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{
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/* TO-DO */
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TFM_Face face = (TFM_Face)tfmface;
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FT_Error error = FT_Err_Ok;
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FT_Memory memory = FT_FACE_MEMORY( face );
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TFM_Glyph tfm=NULL;
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FT_UInt16 i,count;
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FT_UNUSED( num_params );
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FT_UNUSED( params );
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FT_TRACE2(( "TFM driver\n" ));
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/* load font */
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error = tfm_load_font( stream, memory, &tfm );
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if ( FT_ERR_EQ( error, Unknown_File_Format ) )
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{
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FT_TRACE2(( " not a TFM file\n" ));
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goto Fail;
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}
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else if ( error )
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goto Exit;
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/* we have a tfm font: let's construct the face object */
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face->tfm_glyph = tfm ;
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/* TFM cannot have multiple faces in a single font file.
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* XXX: non-zero face_index is already invalid argument, but
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* Type1, Type42 driver has a convention to return
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* an invalid argument error when the font could be
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* opened by the specified driver.
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*/
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if ( face_index > 0 && ( face_index & 0xFFFF ) > 0 )
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{
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FT_ERROR(( "TFM_Face_Init: invalid face index\n" ));
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TFM_Face_Done( tfmface );
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return FT_THROW( Invalid_Argument );
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}
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/* we now need to fill the root FT_Face fields */
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/* with relevant information */
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tfmface->num_faces = 1;
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tfmface->face_index = 0;
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tfmface->face_flags |= FT_FACE_FLAG_FIXED_SIZES |
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FT_FACE_FLAG_HORIZONTAL ;
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tfmface->family_name = NULL;
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FT_TRACE4(( " number of glyphs: allocated %d\n",tfmface->num_glyphs ));
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if ( tfmface->num_glyphs <= 0 )
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{
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FT_ERROR(( "TFM_Face_Init: glyphs not allocated\n" ));
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error = FT_THROW( Invalid_File_Format );
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goto Exit;
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}
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tfmface->num_fixed_sizes = 1;
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if ( FT_NEW_ARRAY( tfmface->available_sizes, 1 ) )
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goto Exit;
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{
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FT_Bitmap_Size* bsize = tfmface->available_sizes;
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FT_UShort x_res, y_res;
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bsize->height = (FT_Short)/* TO-DO */ ;
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bsize->width = (FT_Short)/* TO-DO */ ;
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bsize->size = (FT_Pos) /* TO-DO */ ;
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x_res = /* TO-DO */;
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y_res = /* TO-DO */;
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bsize->y_ppem = (FT_Pos) /* TO-DO */;
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bsize->x_ppem = (FT_Pos) /* TO-DO */;
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}
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/* Charmaps */
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{
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FT_CharMapRec charmap;
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/* Unicode Charmap */
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charmap.encoding = FT_ENCODING_UNICODE;
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charmap.platform_id = TT_PLATFORM_MICROSOFT;
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charmap.encoding_id = TT_MS_ID_UNICODE_CS;
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charmap.face = FT_FACE( face );
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error = FT_CMap_New( &tfm_cmap_class, NULL, &charmap, NULL );
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if ( error )
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goto Exit;
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}
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Exit:
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return error;
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Fail:
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TFM_Face_Done( tfmface );
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return FT_THROW( Unknown_File_Format );
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}
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FT_CALLBACK_DEF( FT_Error )
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TFM_Size_Select( FT_Size size,
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FT_ULong strike_index )
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{
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/* TO-DO */
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TFM_Face face = (TFM_Face)size->face;
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FT_UNUSED( strike_index );
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FT_Select_Metrics( size->face, 0 );
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size->metrics.ascender = /* TO-DO */;
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size->metrics.descender = /* TO-DO */;
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size->metrics.max_advance = /* TO-DO */;
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return FT_Err_Ok;
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}
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FT_CALLBACK_DEF( FT_Error )
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TFM_Size_Request( FT_Size size,
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FT_Size_Request req )
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{
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/* TO-DO */
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TFM_Face face = (TFM_Face)size->face;
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FT_Bitmap_Size* bsize = size->face->available_sizes;
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FT_Error error = FT_ERR( Invalid_Pixel_Size );
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FT_Long height;
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height = FT_REQUEST_HEIGHT( req );
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height = ( height + 32 ) >> 6;
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switch ( req->type )
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{
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case FT_SIZE_REQUEST_TYPE_NOMINAL:
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if ( height == ( ( bsize->y_ppem + 32 ) >> 6 ) )
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error = FT_Err_Ok;
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break;
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case FT_SIZE_REQUEST_TYPE_REAL_DIM:
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if ( height == /* TO-DO */ )
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error = FT_Err_Ok;
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break;
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default:
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error = FT_THROW( Unimplemented_Feature );
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break;
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}
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if ( error )
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return error;
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else
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return TFM_Size_Select( size, 0 );
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}
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@ -170,7 +316,56 @@
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FT_UInt glyph_index,
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FT_Int32 load_flags )
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{
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/* TO-DO */
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TFM_Face tfm = (TFM_Face)FT_SIZE_FACE( size );
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FT_Face face = FT_FACE( tfm );
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FT_Error error = FT_Err_Ok;
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FT_Bitmap* bitmap = &slot->bitmap;
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FT_UNUSED( load_flags );
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if ( !face )
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{
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error = FT_THROW( Invalid_Face_Handle );
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goto Exit;
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}
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if ( glyph_index >= (FT_UInt)( face->num_glyphs ) )
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{
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error = FT_THROW( Invalid_Argument );
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goto Exit;
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}
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FT_TRACE1(( "TFM_Glyph_Load: glyph index %d\n", glyph_index ));
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if ( glyph_index < 0 )
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glyph_index = 0;
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/* slot, bitmap => freetype, bm => tfmlib */
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bitmap->rows = /* TO-DO */;
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bitmap->width = /* TO-DO */;
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bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
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bitmap->pitch = (int)/* TO-DO */;
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/* note: we don't allocate a new array to hold the bitmap; */
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/* we can simply point to it */
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ft_glyphslot_set_bitmap( slot, /* TO-DO */);
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slot->format = FT_GLYPH_FORMAT_BITMAP;
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slot->bitmap_left = /* TO-DO */ ;
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slot->bitmap_top = /* TO-DO */ ;
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slot->metrics.horiAdvance = (FT_Pos) /* TO-DO */ * 64;
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slot->metrics.horiBearingX = (FT_Pos) /* TO-DO */ * 64;
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slot->metrics.horiBearingY = (FT_Pos) /* TO-DO */ * 64;
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slot->metrics.width = (FT_Pos) ( bitmap->width * 64 );
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slot->metrics.height = (FT_Pos) ( bitmap->rows * 64 );
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ft_synthesize_vertical_metrics( &slot->metrics, /* TO-DO */ * 64 );
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Exit:
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return error;
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}
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@ -17,7 +17,7 @@
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/**************************************************************************
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*
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* This file is used to define the GF error enumeration constants.
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* This file is used to define the TFM error enumeration constants.
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*
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*/
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