forked from minhngoc25a/freetype2
[pk] Define `pk_driver_class' functions.
* src/pk/pkdrivr.c: Define all the `pk_driver_class' functions.
This commit is contained in:
Parth Wazurkar
parent
ab86ec699d
commit
86a901d198
261
src/pk/pkdrivr.c
261
src/pk/pkdrivr.c
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@ -133,7 +133,18 @@
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FT_CALLBACK_DEF( void )
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PK_Face_Done( FT_Face pkface ) /* PK_Face */
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{
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/* TO-DO */
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PK_Face face = (PK_Face)pkface;
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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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pk_free_font( face );
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FT_FREE( pkface->available_sizes );
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}
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@ -144,21 +155,183 @@
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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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PK_Face face = (PK_Face)pkface;
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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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PK_Glyph go=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(( "PK driver\n" ));
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/* load font */
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error = pk_load_font( stream, memory, &go );
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if ( FT_ERR_EQ( error, Unknown_File_Format ) )
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{
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FT_TRACE2(( " not a PK 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 pk font: let's construct the face object */
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face->pk_glyph = go ;
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/* sanity check */
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if ( !face->pk_glyph->bm_table )
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{
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FT_TRACE2(( "glyph bitmaps 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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/* PK 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(( "PK_Face_Init: invalid face index\n" ));
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PK_Face_Done( pkface );
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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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pkface->num_faces = 1;
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pkface->face_index = 0;
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pkface->face_flags |= FT_FACE_FLAG_FIXED_SIZES |
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FT_FACE_FLAG_HORIZONTAL ;
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/*
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* XXX: TO-DO: pkface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
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* XXX: I have to check for this.
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*/
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pkface->family_name = NULL;
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count=0;
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for (i = 0; i < 256; i++)
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{
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if(go->bm_table[i].bitmap != NULL)
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count++;
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}
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pkface->num_glyphs = (FT_Long)count;
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FT_TRACE4(( " number of glyphs: allocated %d\n",pkface->num_glyphs ));
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if ( pkface->num_glyphs <= 0 )
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{
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FT_ERROR(( "PK_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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pkface->num_fixed_sizes = 1;
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if ( FT_NEW_ARRAY( pkface->available_sizes, 1 ) )
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goto Exit;
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{
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FT_Bitmap_Size* bsize = pkface->available_sizes;
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/* FT_UShort x_res, y_res; */
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bsize->height = (FT_Short) face->pk_glyph->font_bbx_h ;
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bsize->width = (FT_Short) face->pk_glyph->font_bbx_w ;
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bsize->size = (FT_Pos) face->pk_glyph->ds << 6 ;
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/* x_res = toint( go->hppp * 72.27 ); */
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/* y_res = toint( go->vppp * 72.27 ); */
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bsize->y_ppem = (FT_Pos)(bsize->size/10) << 6 ;
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bsize->x_ppem = (FT_Pos)bsize->y_ppem ;
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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( &pk_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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if ( go->code_max < go->code_min )
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{
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FT_TRACE2(( "invalid number of glyphs\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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Exit:
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return error;
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Fail:
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PK_Face_Done( pkface );
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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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PK_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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PK_Face face = (PK_Face)size->face;
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PK_Glyph go = face->pk_glyph;
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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 = (go->font_bbx_h - go->font_bbx_yoff) * 64;
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size->metrics.descender = -go->font_bbx_yoff * 64;
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size->metrics.max_advance = go->font_bbx_w * 64;
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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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PK_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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PK_Face face = (PK_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 == face->pk_glyph->font_bbx_h )
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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 PK_Size_Select( size, 0 );
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}
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@ -169,7 +342,85 @@
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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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PK_Face pk = (PK_Face)FT_SIZE_FACE( size );
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FT_Face face = FT_FACE( pk );
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FT_Error error = FT_Err_Ok;
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FT_Bitmap* bitmap = &slot->bitmap;
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PK_BitmapRec bm;
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PK_Glyph go;
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FT_Int ascent;
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go = pk->pk_glyph;
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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 ( !go ||
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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(( "PK_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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if ((glyph_index < go->code_min) || (go->code_max < glyph_index))
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{
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FT_TRACE2(( "invalid glyph index\n" ));
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error = FT_THROW( Invalid_Argument );
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goto Exit;
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}
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if ( !go->bm_table )
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{
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FT_TRACE2(( "invalid bitmap table\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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/* slot, bitmap => freetype, bm => pklib */
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bm = pk->pk_glyph->bm_table[glyph_index];
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bitmap->rows = bm.bbx_height;
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bitmap->width = bm.bbx_width;
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bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
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if ( !bm.raster )
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{
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FT_TRACE2(( "invalid bitmap width\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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bitmap->pitch = (int)bm.raster ;
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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, bm.bitmap );
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ascent = (bm.bbx_height + bm.off_y);
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slot->format = FT_GLYPH_FORMAT_BITMAP;
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slot->bitmap_left = bm.off_x ;
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slot->bitmap_top = ascent ;
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slot->metrics.horiAdvance = (FT_Pos) (bm.mv_x ) * 64;
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slot->metrics.horiBearingX = (FT_Pos) (bm.off_x ) * 64;
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slot->metrics.horiBearingY = (FT_Pos) ascent * 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, bm.bbx_height * 64 );
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Exit:
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return error;
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}
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