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