1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2016 and later: Unicode, Inc. and others. 5 * License & terms of use: http://www.unicode.org/copyright.html#License 6 * 7 ******************************************************************************* 8 ******************************************************************************* 9 * 10 * Copyright (C) 1999-2003, International Business Machines 11 * Corporation and others. All Rights Reserved. 12 * 13 ******************************************************************************* 14 * file name: ScriptCompositeFontInstance.cpp 15 * 16 * created on: 02/05/2003 17 * created by: Eric R. Mader 18 */ 19 20 #include "layout/LETypes.h" 21 22 #include "unicode/uscript.h" 23 24 #include "FontMap.h" 25 26 #include "ScriptCompositeFontInstance.h" 27 28 const char ScriptCompositeFontInstance::fgClassID=0; 29 30 ScriptCompositeFontInstance::ScriptCompositeFontInstance(FontMap *fontMap) 31 : fFontMap(fontMap) 32 { 33 // nothing else to do 34 } 35 36 ScriptCompositeFontInstance::~ScriptCompositeFontInstance() 37 { 38 delete fFontMap; 39 fFontMap = NULL; 40 } 41 42 void ScriptCompositeFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const 43 { 44 LEErrorCode status = LE_NO_ERROR; 45 le_int32 script = LE_GET_SUB_FONT(glyph); 46 const LEFontInstance *font = fFontMap->getScriptFont(script, status); 47 48 advance.fX = 0; 49 advance.fY = 0; 50 51 if (LE_SUCCESS(status)) { 52 font->getGlyphAdvance(LE_GET_GLYPH(glyph), advance); 53 } 54 } 55 56 le_bool ScriptCompositeFontInstance::getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const 57 { 58 LEErrorCode status = LE_NO_ERROR; 59 le_int32 script = LE_GET_SUB_FONT(glyph); 60 const LEFontInstance *font = fFontMap->getScriptFont(script, status); 61 62 if (LE_SUCCESS(status)) { 63 return font->getGlyphPoint(LE_GET_GLYPH(glyph), pointNumber, point); 64 } 65 66 return FALSE; 67 } 68 69 const LEFontInstance *ScriptCompositeFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, le_int32 script, LEErrorCode &success) const 70 { 71 if (LE_FAILURE(success)) { 72 return NULL; 73 } 74 75 if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) { 76 success = LE_ILLEGAL_ARGUMENT_ERROR; 77 return NULL; 78 } 79 80 const LEFontInstance *result = fFontMap->getScriptFont(script, success); 81 82 if (LE_FAILURE(success)) { 83 return NULL; 84 } 85 86 *offset = limit; 87 return result; 88 } 89 90 // This is the really stupid version that doesn't look in any other font for the character... 91 // It would be better to also look in the "DEFAULT:" font. Another thing to do would be to 92 // look in all the fonts in some order, script code order being the most obvious... 93 LEGlyphID ScriptCompositeFontInstance::mapCharToGlyph(LEUnicode32 ch) const 94 { 95 UErrorCode error = U_ZERO_ERROR; 96 LEErrorCode status = LE_NO_ERROR; 97 le_int32 script = uscript_getScript(ch, &error); 98 const LEFontInstance *scriptFont = fFontMap->getScriptFont(script, status); 99 LEGlyphID subFont = LE_SET_SUB_FONT(0, script); 100 101 if (LE_FAILURE(status)) { 102 return subFont; 103 } 104 105 LEGlyphID glyph = scriptFont->mapCharToGlyph(ch); 106 107 return LE_SET_GLYPH(subFont, glyph); 108 } 109 110