xref: /aoo42x/main/vcl/source/fontsubset/xlat.cxx (revision 3935342b)
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21 
22 
23 
24 #include "rtl/textcvt.h"
25 #include <tools/debug.hxx>
26 
27 namespace { // anonymous namespace
28 
29 // ====================================================================
30 
31 #define MAX_CVT_SELECT 6
32 
33 class ConverterCache
34 {
35 public:
36 	explicit	ConverterCache( void );
37 				~ConverterCache( void );
38 	sal_uInt16	convertOne( int nSelect, sal_Unicode );
39 	void		convertStr( int nSelect, const sal_Unicode* pSrc, sal_uInt16* pDst, int nCount );
40 protected:
41 	void		ensureConverter( int nSelect );
42 private:
43 	rtl_UnicodeToTextConverter maConverterCache[ MAX_CVT_SELECT+1 ];
44 	rtl_UnicodeToTextContext maContexts[ MAX_CVT_SELECT+1 ];
45 };
46 
47 // ====================================================================
48 
ConverterCache(void)49 ConverterCache::ConverterCache( void)
50 {
51 	for( int i = 0; i <= MAX_CVT_SELECT; ++i)
52 	{
53 		maConverterCache[i] = NULL;
54 		maContexts[i] = NULL;
55 	}
56 }
57 
58 // --------------------------------------------------------------------
59 
~ConverterCache(void)60 ConverterCache::~ConverterCache( void)
61 {
62 	for( int i = 0; i <= MAX_CVT_SELECT; ++i)
63 	{
64 		if( !maContexts[i] )
65 			continue;
66 		rtl_destroyUnicodeToTextContext( maConverterCache[i], maContexts[i] );
67 		rtl_destroyUnicodeToTextConverter( maConverterCache[i] );
68 	}
69 }
70 
71 // --------------------------------------------------------------------
72 
ensureConverter(int nSelect)73 void ConverterCache::ensureConverter( int nSelect )
74 {
75 	// DBG_ASSERT( (2<=nSelect) && (nSelect<=MAX_CVT_SELECT)), "invalid XLAT.Converter requested" );
76 	rtl_UnicodeToTextContext aContext = maContexts[ nSelect ];
77 	if( !aContext )
78 	{
79 		rtl_TextEncoding eRecodeFrom = RTL_TEXTENCODING_UNICODE;
80 		switch( nSelect )
81 		{
82 			default: nSelect = 1; // fall through to unicode recoding
83 			case 1: eRecodeFrom = RTL_TEXTENCODING_UNICODE; break;
84 			case 2: eRecodeFrom = RTL_TEXTENCODING_SHIFT_JIS; break;
85 			case 3: eRecodeFrom = RTL_TEXTENCODING_GB_2312; break;
86 			case 4: eRecodeFrom = RTL_TEXTENCODING_BIG5; break;
87 			case 5: eRecodeFrom = RTL_TEXTENCODING_MS_949; break;
88 			case 6: eRecodeFrom = RTL_TEXTENCODING_MS_1361; break;
89 		}
90 		rtl_UnicodeToTextConverter aRecodeConverter = rtl_createUnicodeToTextConverter( eRecodeFrom );
91 		maConverterCache[ nSelect ] = aRecodeConverter;
92 
93 		aContext = rtl_createUnicodeToTextContext( aRecodeConverter );
94 		maContexts[ nSelect ] = aContext;
95 	}
96 
97 	rtl_resetUnicodeToTextContext( maConverterCache[ nSelect ], aContext );
98 }
99 
100 // --------------------------------------------------------------------
101 
convertOne(int nSelect,sal_Unicode aChar)102 sal_uInt16 ConverterCache::convertOne( int nSelect, sal_Unicode aChar )
103 {
104 	ensureConverter( nSelect );
105 
106 	sal_Unicode aUCS2Char = aChar;
107 	sal_Char aTempArray[8];
108 	sal_Size nTempSize;
109 	sal_uInt32 nCvtInfo;
110 
111 	// TODO: use direct unicode->mbcs converter should there ever be one
112 	int nCodeLen = rtl_convertUnicodeToText(
113 			maConverterCache[ nSelect ], maContexts[ nSelect ],
114 			&aUCS2Char, 1, aTempArray, sizeof(aTempArray),
115 			RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0
116 			| RTL_UNICODETOTEXT_FLAGS_INVALID_0,
117 			&nCvtInfo, &nTempSize );
118 
119 	sal_uInt16 aCode = aTempArray[0];
120 	for( int i = 1; i < nCodeLen; ++i )
121 		aCode = (aCode << 8) + (aTempArray[i] & 0xFF);
122 	return aCode;
123 }
124 
125 // --------------------------------------------------------------------
126 
convertStr(int nSelect,const sal_Unicode * pSrc,sal_uInt16 * pDst,int nCount)127 void ConverterCache::convertStr( int nSelect, const sal_Unicode* pSrc, sal_uInt16* pDst, int nCount )
128 {
129 	ensureConverter( nSelect );
130 
131 	for( int n = 0; n < nCount; ++n )
132 	{
133 		sal_Unicode aUCS2Char = pSrc[n];
134 
135 		sal_Char aTempArray[8];
136 		sal_Size nTempSize;
137 		sal_uInt32 nCvtInfo;
138 
139 		// assume that non-unicode-fonts do not support codepoints >U+FFFF
140 		// TODO: use direct unicode->mbcs converter should there ever be one
141 		int nCodeLen = rtl_convertUnicodeToText(
142 			maConverterCache[ nSelect ], maContexts[ nSelect ],
143 			&aUCS2Char, 1, aTempArray, sizeof(aTempArray),
144 			RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0
145 			| RTL_UNICODETOTEXT_FLAGS_INVALID_0,
146 			&nCvtInfo, &nTempSize );
147 
148 		sal_uInt16 aCode = aTempArray[0];
149 		for( int i = 1; i < nCodeLen; ++i )
150 			aCode = (aCode << 8) + (aTempArray[i] & 0xFF);
151 		pDst[n] = aCode;
152 	}
153 }
154 
155 } // anonymous namespace
156 
157 // ====================================================================
158 
159 #include "xlat.hxx"
160 
161 namespace vcl
162 {
163 
164 static ConverterCache aCC;
165 
TranslateChar12(sal_uInt16 src)166 sal_uInt16 TranslateChar12(sal_uInt16 src)
167 {
168 	return aCC.convertOne( 2, src);
169 }
170 
TranslateChar13(sal_uInt16 src)171 sal_uInt16 TranslateChar13(sal_uInt16 src)
172 {
173 	return aCC.convertOne( 3, src);
174 }
175 
TranslateChar14(sal_uInt16 src)176 sal_uInt16 TranslateChar14(sal_uInt16 src)
177 {
178 	return aCC.convertOne( 4, src);
179 }
180 
TranslateChar15(sal_uInt16 src)181 sal_uInt16 TranslateChar15(sal_uInt16 src)
182 {
183 	return aCC.convertOne( 5, src);
184 }
185 
TranslateChar16(sal_uInt16 src)186 sal_uInt16 TranslateChar16(sal_uInt16 src)
187 {
188 	return aCC.convertOne( 6, src);
189 }
190 
TranslateString12(sal_uInt16 * src,sal_uInt16 * dst,sal_uInt32 n)191 void TranslateString12(sal_uInt16 *src, sal_uInt16 *dst, sal_uInt32 n)
192 {
193 	aCC.convertStr( 2, src, dst, n);
194 }
195 
TranslateString13(sal_uInt16 * src,sal_uInt16 * dst,sal_uInt32 n)196 void TranslateString13(sal_uInt16 *src, sal_uInt16 *dst, sal_uInt32 n)
197 {
198 	aCC.convertStr( 3, src, dst, n);
199 }
200 
TranslateString14(sal_uInt16 * src,sal_uInt16 * dst,sal_uInt32 n)201 void TranslateString14(sal_uInt16 *src, sal_uInt16 *dst, sal_uInt32 n)
202 {
203 	aCC.convertStr( 4, src, dst, n);
204 }
205 
TranslateString15(sal_uInt16 * src,sal_uInt16 * dst,sal_uInt32 n)206 void TranslateString15(sal_uInt16 *src, sal_uInt16 *dst, sal_uInt32 n)
207 {
208 	aCC.convertStr( 5, src, dst, n);
209 }
210 
TranslateString16(sal_uInt16 * src,sal_uInt16 * dst,sal_uInt32 n)211 void TranslateString16(sal_uInt16 *src, sal_uInt16 *dst, sal_uInt32 n)
212 {
213 	aCC.convertStr( 6, src, dst, n);
214 }
215 
216 } // namespace vcl
217 
218 /* vim: set noet sw=4 ts=4: */
219