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2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
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11 * http://www.apache.org/licenses/LICENSE-2.0
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15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
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21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_vcl.hxx"
26
27 #include <tools/debug.hxx>
28
29 #include <fontsubset.hxx>
30 #include <sft.hxx>
31
32 // ====================================================================
33
FontSubsetInfo()34 FontSubsetInfo::FontSubsetInfo()
35 : m_nAscent( 0)
36 , m_nDescent( 0)
37 , m_nCapHeight( 0)
38 , m_nFontType( FontSubsetInfo::NO_FONT)
39 , mpInFontBytes( NULL)
40 , mnInByteLength( 0)
41 , meInFontType( FontSubsetInfo::NO_FONT)
42 , mpSftTTFont( NULL)
43 {}
44
45 // --------------------------------------------------------------------
46
~FontSubsetInfo()47 FontSubsetInfo::~FontSubsetInfo()
48 {}
49
50 // --------------------------------------------------------------------
51
52 // prepare subsetting for fonts where the input font file is mapped
LoadFont(FontSubsetInfo::FontType eInFontType,const unsigned char * pInFontBytes,int nInByteLength)53 bool FontSubsetInfo::LoadFont(
54 FontSubsetInfo::FontType eInFontType,
55 const unsigned char* pInFontBytes, int nInByteLength)
56 {
57 DBG_ASSERT( (mpSftTTFont == NULL), "Subset from SFT and from mapped font-file requested");
58 meInFontType = eInFontType;
59 mpInFontBytes = pInFontBytes;
60 mnInByteLength = nInByteLength;
61 return (mnInByteLength > 0);
62 }
63
64 // --------------------------------------------------------------------
65
66 // prepare subsetting for fonts that are known to the SFT-parser
LoadFont(vcl::_TrueTypeFont * pSftTTFont)67 bool FontSubsetInfo::LoadFont( vcl::_TrueTypeFont* pSftTTFont )
68 {
69 DBG_ASSERT( (mpInFontBytes == NULL), "Subset from SFT and from mapped font-file requested");
70 mpSftTTFont = pSftTTFont;
71 meInFontType = ANY_SFNT;
72 return (mpSftTTFont == NULL);
73 }
74
75 // --------------------------------------------------------------------
76
CreateFontSubset(int nReqFontTypeMask,FILE * pOutFile,const char * pReqFontName,const sal_GlyphId * pReqGlyphIds,const sal_uInt8 * pReqEncodedIds,int nReqGlyphCount,sal_Int32 * pOutGlyphWidths)77 bool FontSubsetInfo::CreateFontSubset(
78 int nReqFontTypeMask,
79 FILE* pOutFile, const char* pReqFontName,
80 const sal_GlyphId* pReqGlyphIds, const sal_uInt8* pReqEncodedIds, int nReqGlyphCount,
81 sal_Int32* pOutGlyphWidths)
82 {
83 // prepare request details needed by all underlying subsetters
84 mnReqFontTypeMask = nReqFontTypeMask;
85 mpOutFile = pOutFile;
86 mpReqFontName = pReqFontName;
87 mpReqGlyphIds = pReqGlyphIds;
88 mpReqEncodedIds = pReqEncodedIds;
89 mnReqGlyphCount = nReqGlyphCount;
90
91 // TODO: move the glyphid/encid/notdef reshuffling from the callers to here
92
93 // dispatch to underlying subsetters
94 bool bOK = false;
95
96 // TODO: better match available input-type to possible subset-types
97 switch( meInFontType) {
98 case SFNT_TTF:
99 case SFNT_CFF:
100 case ANY_SFNT:
101 bOK = CreateFontSubsetFromSfnt( pOutGlyphWidths);
102 break;
103 case CFF_FONT:
104 bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
105 break;
106 case TYPE1_PFA:
107 case TYPE1_PFB:
108 case ANY_TYPE1:
109 bOK = CreateFontSubsetFromType1( pOutGlyphWidths);
110 break;
111 // fall trough
112 case NO_FONT:
113 // fall trough
114 default:
115 DBG_ERROR( "unhandled type in CreateFontSubset()");
116 break;
117 }
118
119 return bOK;
120 }
121
122 // --------------------------------------------------------------------
123
124 // TODO: move function to sft.cxx to replace dummy implementation
CreateFontSubsetFromSfnt(sal_Int32 * pOutGlyphWidths)125 bool FontSubsetInfo::CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths )
126 {
127 // handle SFNT_CFF fonts
128 int nCffLength = 0;
129 const sal_uInt8* pCffBytes = NULL;
130 if( GetSfntTable( mpSftTTFont, O_CFF, &pCffBytes, &nCffLength))
131 {
132 LoadFont( CFF_FONT, pCffBytes, nCffLength);
133 const bool bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
134 return bOK;
135 }
136
137 // handle SFNT_TTF fonts
138 // by forwarding the subset request to AG's sft subsetter
139 #if 1 // TODO: remove conversion tp 16bit glyphids when sft-subsetter has been updated
140 sal_uInt16 aShortGlyphIds[256];
141 for( int i = 0; i < mnReqGlyphCount; ++i)
142 aShortGlyphIds[i] = (sal_uInt16)mpReqGlyphIds[i];
143 // remove const_cast when sft-subsetter is const-correct
144 sal_uInt8* pEncArray = const_cast<sal_uInt8*>( mpReqEncodedIds );
145 #endif
146 int nSFTErr = vcl::SF_BADARG;
147 if( (mnReqFontTypeMask & TYPE42_FONT) != 0 )
148 {
149 nSFTErr = CreateT42FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
150 aShortGlyphIds, pEncArray, mnReqGlyphCount );
151 }
152 else if( (mnReqFontTypeMask & TYPE3_FONT) != 0 )
153 {
154 nSFTErr = CreateT3FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
155 aShortGlyphIds, pEncArray, mnReqGlyphCount,
156 0 /* 0 = horizontal, 1 = vertical */ );
157 }
158 else if( (mnReqFontTypeMask & SFNT_TTF) != 0 )
159 {
160 // TODO: use CreateTTFromTTGlyphs()
161 // TODO: move functionality from callers here
162 }
163
164 return (nSFTErr != vcl::SF_OK);
165 }
166
167 // --------------------------------------------------------------------
168
169 // TODO: replace dummy implementation
CreateFontSubsetFromType1(sal_Int32 * pOutGlyphWidths)170 bool FontSubsetInfo::CreateFontSubsetFromType1( sal_Int32* pOutGlyphWidths)
171 {
172 #if 0
173 // TODO: replace dummy implementation when someone needs this
174 #else
175 (void)pOutGlyphWidths;
176 fprintf(stderr,"CreateFontSubsetFromType1: replace dummy implementation\n");
177 #endif
178 return false;
179 }
180
181 // ====================================================================
182
183