vcl/qt5/QtGraphics_Text.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <QtGraphics.hxx>
  23 #include <QtFontFace.hxx>
  24 #include <QtFont.hxx>
  25 #include <QtPainter.hxx>
  26
  27 #include <fontsubset.hxx>
  28 #include <vcl/fontcharmap.hxx>
  29 #include <unx/geninst.h>
  30 #include <unx/fontmanager.hxx>
  31 #include <unx/glyphcache.hxx>
  32 #include <unx/genpspgraphics.h>
  33
  34 #include <sallayout.hxx>
  35 #include <font/PhysicalFontCollection.hxx>
  36
  37 #include <QtGui/QGlyphRun>
  38 #include <QtGui/QFontDatabase>
  39 #include <QtGui/QRawFont>
  40 #include <QtCore/QStringList>
  41
  42 void QtGraphics::SetTextColor(Color nColor) { m_aTextColor = nColor; }
  43
  44 void QtGraphics::SetFont(LogicalFontInstance* pReqFont, int nFallbackLevel)
  45 {
  46     // release the text styles
  47     for (int i = nFallbackLevel; i < MAX_FALLBACK; ++i)
  48     {
  49         if (!m_pTextStyle[i])
  50             break;
  51         m_pTextStyle[i].clear();
  52     }
  53
  54     if (!pReqFont)
  55         return;
  56
  57     m_pTextStyle[nFallbackLevel] = static_cast<QtFont*>(pReqFont);
  58 }
  59
  60 void QtGraphics::GetFontMetric(ImplFontMetricDataRef& rFMD, int nFallbackLevel)
  61 {
  62     QRawFont aRawFont(QRawFont::fromFont(*m_pTextStyle[nFallbackLevel]));
  63     QtFontFace::fillAttributesFromQFont(*m_pTextStyle[nFallbackLevel], *rFMD);
  64
  65     rFMD->ImplCalcLineSpacing(m_pTextStyle[nFallbackLevel].get());
  66
  67     rFMD->SetSlant(0);
  68     rFMD->SetWidth(aRawFont.averageCharWidth());
  69
  70     rFMD->SetMinKashida(m_pTextStyle[nFallbackLevel]->GetKashidaWidth());
  71 }
  72
  73 FontCharMapRef QtGraphics::GetFontCharMap() const
  74 {
  75     if (!m_pTextStyle[0])
  76         return FontCharMapRef(new FontCharMap());
  77     return m_pTextStyle[0]->GetFontFace()->GetFontCharMap();
  78 }
  79
  80 bool QtGraphics::GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const
  81 {
  82     if (!m_pTextStyle[0])
  83         return false;
  84     return m_pTextStyle[0]->GetFontFace()->GetFontCapabilities(rFontCapabilities);
  85 }
  86
  87 void QtGraphics::GetDevFontList(vcl::font::PhysicalFontCollection* pPFC)
  88 {
  89     static const bool bUseFontconfig = (nullptr == getenv("SAL_VCL_QT5_NO_FONTCONFIG"));
  90
  91     if (pPFC->Count())
  92         return;
  93
  94     QFontDatabase aFDB;
  95     FreetypeManager& rFontManager = FreetypeManager::get();
  96     psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
  97     ::std::vector<psp::fontID> aList;
  98     psp::FastPrintFontInfo aInfo;
  99
 100     rMgr.getFontList(aList);
 101     for (auto const& elem : aList)
 102     {
 103         if (!rMgr.getFontFastInfo(elem, aInfo))
 104             continue;
 105
 106         // normalize face number to the FreetypeManager
 107         int nFaceNum = rMgr.getFontFaceNumber(aInfo.m_nID);
 108         int nVariantNum = rMgr.getFontFaceVariation(aInfo.m_nID);
 109
 110         // inform FreetypeManager about this font provided by the PsPrint subsystem
 111         FontAttributes aDFA = GenPspGraphics::Info2FontAttributes(aInfo);
 112         aDFA.IncreaseQualityBy(4096);
 113         const OString& rFileName = rMgr.getFontFileSysPath(aInfo.m_nID);
 114         rFontManager.AddFontFile(rFileName, nFaceNum, nVariantNum, aInfo.m_nID, aDFA);
 115     }
 116
 117     if (bUseFontconfig)
 118         SalGenericInstance::RegisterFontSubstitutors(pPFC);
 119
 120     for (auto& family : aFDB.families())
 121         for (auto& style : aFDB.styles(family))
 122             pPFC->Add(QtFontFace::fromQFontDatabase(family, style));
 123 }
 124
 125 void QtGraphics::ClearDevFontCache() {}
 126
 127 bool QtGraphics::AddTempDevFont(vcl::font::PhysicalFontCollection*, const OUString& /*rFileURL*/,
 128                                 const OUString& /*rFontName*/)
 129 {
 130     return false;
 131 }
 132
 133 namespace
 134 {
 135 class QtTrueTypeFont : public vcl::AbstractTrueTypeFont
 136 {
 137     const QRawFont& m_aRawFont;
 138     mutable QByteArray m_aFontTable[vcl::NUM_TAGS];
 139
 140 public:
 141     QtTrueTypeFont(const QtFontFace& aFontFace, const QRawFont& aRawFont);
 142
 143     bool hasTable(sal_uInt32 ord) const override;
 144     const sal_uInt8* table(sal_uInt32 ord, sal_uInt32& size) const override;
 145 };
 146
 147 QtTrueTypeFont::QtTrueTypeFont(const QtFontFace& aFontFace, const QRawFont& aRawFont)
 148     : vcl::AbstractTrueTypeFont(nullptr, aFontFace.GetFontCharMap())
 149     , m_aRawFont(aRawFont)
 150 {
 151     indexGlyphData();
 152 }
 153
 154 const char* vclFontTableAsChar(sal_uInt32 ord)
 155 {
 156     switch (ord)
 157     {
 158         case vcl::O_maxp:
 159             return "maxp";
 160         case vcl::O_glyf:
 161             return "glyf";
 162         case vcl::O_head:
 163             return "head";
 164         case vcl::O_loca:
 165             return "loca";
 166         case vcl::O_name:
 167             return "name";
 168         case vcl::O_hhea:
 169             return "hhea";
 170         case vcl::O_hmtx:
 171             return "hmtx";
 172         case vcl::O_cmap:
 173             return "cmap";
 174         case vcl::O_vhea:
 175             return "vhea";
 176         case vcl::O_vmtx:
 177             return "vmtx";
 178         case vcl::O_OS2:
 179             return "OS/2";
 180         case vcl::O_post:
 181             return "post";
 182         case vcl::O_cvt:
 183             return "cvt ";
 184         case vcl::O_prep:
 185             return "prep";
 186         case vcl::O_fpgm:
 187             return "fpgm";
 188         case vcl::O_gsub:
 189             return "gsub";
 190         case vcl::O_CFF:
 191             return "CFF ";
 192         default:
 193             return nullptr;
 194     }
 195 }
 196
 197 bool QtTrueTypeFont::hasTable(sal_uInt32 ord) const
 198 {
 199     const char* table_char = vclFontTableAsChar(ord);
 200     if (!table_char)
 201         return false;
 202     if (m_aFontTable[ord].isEmpty())
 203         m_aFontTable[ord] = m_aRawFont.fontTable(table_char);
 204     return !m_aFontTable[ord].isEmpty();
 205 }
 206
 207 const sal_uInt8* QtTrueTypeFont::table(sal_uInt32 ord, sal_uInt32& size) const
 208 {
 209     const char* table_char = vclFontTableAsChar(ord);
 210     if (!table_char)
 211         return nullptr;
 212     if (m_aFontTable[ord].isEmpty())
 213         m_aFontTable[ord] = m_aRawFont.fontTable(table_char);
 214     size = m_aFontTable[ord].size();
 215     return reinterpret_cast<const sal_uInt8*>(m_aFontTable[ord].data());
 216 }
 217 }
 218
 219 bool QtGraphics::CreateFontSubset(const OUString& rToFile,
 220                                   const vcl::font::PhysicalFontFace* pFontFace,
 221                                   const sal_GlyphId* pGlyphIds, const sal_uInt8* pEncoding,
 222                                   sal_Int32* pGlyphWidths, int nGlyphCount, FontSubsetInfo& rInfo)
 223 {
 224     OUString aSysPath;
 225     if (osl_File_E_None != osl_getSystemPathFromFileURL(rToFile.pData, &aSysPath.pData))
 226         return false;
 227
 228     // get the raw-bytes from the font to be subset
 229     const QtFontFace* pQtFontFace = static_cast<const QtFontFace*>(pFontFace);
 230     const QFont aFont = pQtFontFace->CreateFont();
 231     const QRawFont aRawFont(QRawFont::fromFont(aFont));
 232     const OString aToFile(OUStringToOString(aSysPath, osl_getThreadTextEncoding()));
 233
 234     // handle CFF-subsetting
 235     QByteArray aCFFtable = aRawFont.fontTable("CFF ");
 236     if (!aCFFtable.isEmpty())
 237         return SalGraphics::CreateCFFfontSubset(
 238             reinterpret_cast<const sal_uInt8*>(aCFFtable.data()), aCFFtable.size(), aToFile,
 239             pGlyphIds, pEncoding, pGlyphWidths, nGlyphCount, rInfo);
 240
 241     // fill details about the subsetted font
 242     rInfo.m_nFontType = FontType::SFNT_TTF;
 243     rInfo.m_aPSName = toOUString(aRawFont.familyName());
 244     rInfo.m_nCapHeight = aRawFont.capHeight();
 245     rInfo.m_nAscent = aRawFont.ascent();
 246     rInfo.m_nDescent = aRawFont.descent();
 247
 248     QtTrueTypeFont aTTF(*pQtFontFace, aRawFont);
 249     int nXmin, nYmin, nXmax, nYmax;
 250     sal_uInt16 nMacStyleFlags;
 251     if (GetTTGlobalFontHeadInfo(&aTTF, nXmin, nYmin, nXmax, nYmax, nMacStyleFlags))
 252         rInfo.m_aFontBBox = tools::Rectangle(Point(nXmin, nYmin), Point(nXmax, nYmax));
 253
 254     return SalGraphics::CreateTTFfontSubset(aTTF, aToFile, false /* use FontSelectPattern? */,
 255                                             pGlyphIds, pEncoding, pGlyphWidths, nGlyphCount);
 256 }
 257
 258 const void* QtGraphics::GetEmbedFontData(const vcl::font::PhysicalFontFace*,
 259                                          tools::Long* /*pDataLen*/)
 260 {
 261     return nullptr;
 262 }
 263
 264 void QtGraphics::FreeEmbedFontData(const void* /*pData*/, tools::Long /*nDataLen*/) {}
 265
 266 void QtGraphics::GetGlyphWidths(const vcl::font::PhysicalFontFace* pFontFace, bool bVertical,
 267                                 std::vector<sal_Int32>& rWidths, Ucs2UIntMap& rUnicodeEnc)
 268 {
 269     const QtFontFace* pQtFontFace = static_cast<const QtFontFace*>(pFontFace);
 270     const QRawFont aRawFont(QRawFont::fromFont(pQtFontFace->CreateFont()));
 271     QtTrueTypeFont aTTF(*pQtFontFace, aRawFont);
 272     SalGraphics::GetGlyphWidths(aTTF, *pFontFace, bVertical, rWidths, rUnicodeEnc);
 273 }
 274
 275 namespace
 276 {
 277 class QtCommonSalLayout : public GenericSalLayout
 278 {
 279 public:
 280     QtCommonSalLayout(LogicalFontInstance& rLFI)
 281         : GenericSalLayout(rLFI)
 282     {
 283     }
 284
 285     void SetOrientation(Degree10 nOrientation) { mnOrientation = nOrientation; }
 286 };
 287 }
 288
 289 std::unique_ptr<GenericSalLayout> QtGraphics::GetTextLayout(int nFallbackLevel)
 290 {
 291     assert(m_pTextStyle[nFallbackLevel]);
 292     if (!m_pTextStyle[nFallbackLevel])
 293         return nullptr;
 294     return std::make_unique<QtCommonSalLayout>(*m_pTextStyle[nFallbackLevel]);
 295 }
 296
 297 void QtGraphics::DrawTextLayout(const GenericSalLayout& rLayout)
 298 {
 299     const QtFont* pFont = static_cast<const QtFont*>(&rLayout.GetFont());
 300     assert(pFont);
 301     QRawFont aRawFont(QRawFont::fromFont(*pFont));
 302
 303     QVector<quint32> glyphIndexes;
 304     QVector<QPointF> positions;
 305
 306     // prevent glyph rotation inside the SalLayout
 307     // probably better to add a parameter to GetNextGlyphs?
 308     QtCommonSalLayout* pQtLayout
 309         = static_cast<QtCommonSalLayout*>(const_cast<GenericSalLayout*>(&rLayout));
 310     Degree10 nOrientation = rLayout.GetOrientation();
 311     if (nOrientation)
 312         pQtLayout->SetOrientation(0_deg10);
 313
 314     Point aPos;
 315     const GlyphItem* pGlyph;
 316     int nStart = 0;
 317     while (rLayout.GetNextGlyph(&pGlyph, aPos, nStart))
 318     {
 319         glyphIndexes.push_back(pGlyph->glyphId());
 320         positions.push_back(QPointF(aPos.X(), aPos.Y()));
 321     }
 322
 323     // seems to be common to try to layout an empty string...
 324     if (positions.empty())
 325         return;
 326
 327     if (nOrientation)
 328         pQtLayout->SetOrientation(nOrientation);
 329
 330     QGlyphRun aGlyphRun;
 331     aGlyphRun.setPositions(positions);
 332     aGlyphRun.setGlyphIndexes(glyphIndexes);
 333     aGlyphRun.setRawFont(aRawFont);
 334
 335     QtPainter aPainter(*m_pBackend);
 336     QColor aColor = toQColor(m_aTextColor);
 337     aPainter.setPen(aColor);
 338
 339     if (nOrientation)
 340     {
 341         // make text position the center of the rotation
 342         // then rotate and move back
 343         QRect window = aPainter.window();
 344         window.moveTo(-positions[0].x(), -positions[0].y());
 345         aPainter.setWindow(window);
 346
 347         QTransform p;
 348         p.rotate(-static_cast<qreal>(nOrientation.get()) / 10.0);
 349         p.translate(-positions[0].x(), -positions[0].y());
 350         aPainter.setTransform(p);
 351     }
 352
 353     aPainter.drawGlyphRun(QPointF(), aGlyphRun);
 354 }
 355
 356 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */