1 /*
2 *******************************************************************************
3 *
4 * © 2016 and later: Unicode, Inc. and others.
5 * License & terms of use: http://www.unicode.org/copyright.html
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
ScriptCompositeFontInstance(FontMap * fontMap)30 ScriptCompositeFontInstance::ScriptCompositeFontInstance(FontMap *fontMap)
31 : fFontMap(fontMap)
32 {
33 // nothing else to do
34 }
35
~ScriptCompositeFontInstance()36 ScriptCompositeFontInstance::~ScriptCompositeFontInstance()
37 {
38 delete fFontMap;
39 fFontMap = NULL;
40 }
41
getGlyphAdvance(LEGlyphID glyph,LEPoint & advance) const42 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
getGlyphPoint(LEGlyphID glyph,le_int32 pointNumber,LEPoint & point) const56 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
getSubFont(const LEUnicode chars[],le_int32 * offset,le_int32 limit,le_int32 script,LEErrorCode & success) const69 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...
mapCharToGlyph(LEUnicode32 ch) const93 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