110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
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*******************************************************************************
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*
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* © 2016 and later: Unicode, Inc. and others.
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* License & terms of use: http://www.unicode.org/copyright.html#License
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*
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*******************************************************************************
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*******************************************************************************
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*
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* Copyright (C) 1999-2003, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: ScriptCompositeFontInstance.cpp
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*
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* created on: 02/05/2003
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* created by: Eric R. Mader
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*/
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#include "layout/LETypes.h"
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#include "unicode/uscript.h"
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#include "FontMap.h"
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#include "ScriptCompositeFontInstance.h"
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const char ScriptCompositeFontInstance::fgClassID=0;
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ScriptCompositeFontInstance::ScriptCompositeFontInstance(FontMap *fontMap)
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: fFontMap(fontMap)
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{
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// nothing else to do
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}
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ScriptCompositeFontInstance::~ScriptCompositeFontInstance()
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{
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delete fFontMap;
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fFontMap = NULL;
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}
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void ScriptCompositeFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
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{
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LEErrorCode status = LE_NO_ERROR;
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le_int32 script = LE_GET_SUB_FONT(glyph);
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const LEFontInstance *font = fFontMap->getScriptFont(script, status);
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advance.fX = 0;
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advance.fY = 0;
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if (LE_SUCCESS(status)) {
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font->getGlyphAdvance(LE_GET_GLYPH(glyph), advance);
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}
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}
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le_bool ScriptCompositeFontInstance::getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const
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{
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LEErrorCode status = LE_NO_ERROR;
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le_int32 script = LE_GET_SUB_FONT(glyph);
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const LEFontInstance *font = fFontMap->getScriptFont(script, status);
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if (LE_SUCCESS(status)) {
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return font->getGlyphPoint(LE_GET_GLYPH(glyph), pointNumber, point);
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}
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return FALSE;
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}
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const LEFontInstance *ScriptCompositeFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, le_int32 script, LEErrorCode &success) const
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{
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if (LE_FAILURE(success)) {
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return NULL;
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}
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if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {
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success = LE_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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const LEFontInstance *result = fFontMap->getScriptFont(script, success);
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if (LE_FAILURE(success)) {
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return NULL;
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}
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*offset = limit;
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return result;
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}
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// This is the really stupid version that doesn't look in any other font for the character...
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// It would be better to also look in the "DEFAULT:" font. Another thing to do would be to
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// look in all the fonts in some order, script code order being the most obvious...
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LEGlyphID ScriptCompositeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
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{
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UErrorCode error = U_ZERO_ERROR;
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LEErrorCode status = LE_NO_ERROR;
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le_int32 script = uscript_getScript(ch, &error);
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const LEFontInstance *scriptFont = fFontMap->getScriptFont(script, status);
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LEGlyphID subFont = LE_SET_SUB_FONT(0, script);
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if (LE_FAILURE(status)) {
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return subFont;
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}
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LEGlyphID glyph = scriptFont->mapCharToGlyph(ch);
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return LE_SET_GLYPH(subFont, glyph);
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}
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