ArthurOutputDev.cc 38.3 KB
Newer Older
1 2 3 4 5
//========================================================================
//
// ArthurOutputDev.cc
//
// Copyright 2003 Glyph & Cog, LLC
6 7 8 9 10 11 12
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
13 14 15
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
16
// Copyright (C) 2005 Brad Hards <bradh@frogmouth.net>
Albert Astals Cid's avatar
Albert Astals Cid committed
17
// Copyright (C) 2005-2009, 2011, 2012, 2014, 2015, 2018 Albert Astals Cid <aacid@kde.org>
Pino Toscano's avatar
Pino Toscano committed
18
// Copyright (C) 2008, 2010 Pino Toscano <pino@kde.org>
Albert Astals Cid's avatar
Albert Astals Cid committed
19
// Copyright (C) 2009, 2011 Carlos Garcia Campos <carlosgc@gnome.org>
20
// Copyright (C) 2009 Petr Gajdos <pgajdos@novell.com>
21
// Copyright (C) 2010 Matthias Fauconneau <matthias.fauconneau@gmail.com>
22
// Copyright (C) 2011 Andreas Hartmetz <ahartmetz@gmail.com>
Thomas Freitag's avatar
Thomas Freitag committed
23
// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
24
// Copyright (C) 2013 Dominik Haumann <dhaumann@kde.org>
25
// Copyright (C) 2013 Mihai Niculescu <q.quark@gmail.com>
26
// Copyright (C) 2017, 2018 Oliver Sander <oliver.sander@tu-dresden.de>
27
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
28
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
29
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
30 31 32
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
33 34 35 36 37 38 39 40 41 42 43 44
//
//========================================================================

#include <config.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

#include <string.h>
#include <math.h>

45 46
#include <array>

47 48 49 50 51 52 53 54 55 56
#include "goo/gfile.h"
#include "GlobalParams.h"
#include "Error.h"
#include "Object.h"
#include "GfxState.h"
#include "GfxFont.h"
#include "Link.h"
#include "FontEncodingTables.h"
#include <fofi/FoFiTrueType.h>
#include "ArthurOutputDev.h"
57 58 59
#include "Page.h"
#include "Gfx.h"
#include "PDFDoc.h"
60 61

#include <QtCore/QtDebug>
62 63
#include <QRawFont>
#include <QGlyphRun>
64
#include <QtGui/QPainterPath>
65 66
#include <QPicture>

67 68
//------------------------------------------------------------------------

69
#ifdef HAVE_SPLASH
70
#include "splash/SplashFontFileID.h"
71
#include "splash/SplashFTFontFile.h"
72 73 74 75 76 77 78 79
#include "splash/SplashFontEngine.h"
//------------------------------------------------------------------------
// SplashOutFontFileID
//------------------------------------------------------------------------

class SplashOutFontFileID: public SplashFontFileID {
public:

80
  SplashOutFontFileID(const Ref *rA) { r = *rA; }
81 82 83

  ~SplashOutFontFileID() {}

Albert Astals Cid's avatar
Albert Astals Cid committed
84
  GBool matches(SplashFontFileID *id) override {
85 86 87 88 89 90 91 92 93
    return ((SplashOutFontFileID *)id)->r.num == r.num &&
           ((SplashOutFontFileID *)id)->r.gen == r.gen;
  }

private:

  Ref r;
};

94
#endif
95

96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
class ArthurType3Font
{
public:

  ArthurType3Font(PDFDoc* doc, Gfx8BitFont* font);

  const QPicture& getGlyph(int gid) const;

private:
  PDFDoc* m_doc;
  Gfx8BitFont* m_font;

  mutable std::vector<std::unique_ptr<QPicture> > glyphs;

public:
  std::vector<int> codeToGID;
};

ArthurType3Font::ArthurType3Font(PDFDoc* doc, Gfx8BitFont* font)
: m_doc(doc), m_font(font)
{
  char *name;
  const Dict* charProcs = font->getCharProcs();

  // Storage for the rendered glyphs
  glyphs.resize(charProcs->getLength());

  // Compute the code-to-GID map
  char **enc = font->getEncoding();

  codeToGID.resize(256);

  for (int i = 0; i < 256; ++i) {
    codeToGID[i] = 0;
    if (charProcs && (name = enc[i])) {
      for (int j = 0; j < charProcs->getLength(); j++) {
        if (strcmp(name, charProcs->getKey(j)) == 0) {
          codeToGID[i] = j;
        }
      }
    }
  }
}

const QPicture& ArthurType3Font::getGlyph(int gid) const
{
  if (!glyphs[gid]) {

    // Glyph has not been rendered before: render it now

    // Smallest box that contains all the glyphs from this font
    const double* fontBBox = m_font->getFontBBox();
    PDFRectangle box(fontBBox[0], fontBBox[1], fontBBox[2], fontBBox[3]);

    Dict* resDict = m_font->getResources();

    QPainter glyphPainter;
153
    glyphs[gid] = std::make_unique<QPicture>();
154
    glyphPainter.begin(glyphs[gid].get());
155
    auto output_dev = std::make_unique<ArthurOutputDev>(&glyphPainter);
156

157 158 159 160 161
    auto gfx = std::make_unique<Gfx>(
	  m_doc, output_dev.get(), resDict,
	  &box,  // pagebox
	  nullptr  // cropBox
    );
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177

    output_dev->startDoc(m_doc);

    output_dev->startPage (1, gfx->getState(), gfx->getXRef());

    const Dict* charProcs = m_font->getCharProcs();
    Object charProc = charProcs->getVal(gid);
    gfx->display(&charProc);

    glyphPainter.end();
  }

  return *glyphs[gid];
}


178 179 180 181 182
//------------------------------------------------------------------------
// ArthurOutputDev
//------------------------------------------------------------------------

ArthurOutputDev::ArthurOutputDev(QPainter *painter):
183
  m_lastTransparencyGroupPicture(nullptr),
184
  m_fontHinting(NoHinting)
185
{
186
  m_painter.push(painter);
187
  m_currentBrush = QBrush(Qt::SolidPattern);
188
  m_fontEngine = nullptr;
189 190 191 192
}

ArthurOutputDev::~ArthurOutputDev()
{
193
#ifdef HAVE_SPLASH
194
  delete m_fontEngine;
195
#endif
196 197
}

198 199 200
void ArthurOutputDev::startDoc(PDFDoc* doc) {
  xref = doc->getXRef();
  m_doc = doc;
201
#ifdef HAVE_SPLASH
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
202
  delete m_fontEngine;
203 204 205 206

  const bool isHintingEnabled = m_fontHinting != NoHinting;
  const bool isSlightHinting = m_fontHinting == SlightHinting;

207
  m_fontEngine = new SplashFontEngine(
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
208
  globalParams->getEnableFreeType(),
209 210
  isHintingEnabled,
  isSlightHinting,
211
  m_painter.top()->testRenderHint(QPainter::TextAntialiasing));
212
#endif
213 214
}

Albert Astals Cid's avatar
Albert Astals Cid committed
215
void ArthurOutputDev::startPage(int pageNum, GfxState *state, XRef *)
216
{}
217 218 219 220 221 222

void ArthurOutputDev::endPage() {
}

void ArthurOutputDev::saveState(GfxState *state)
{
223 224 225
  m_currentPenStack.push(m_currentPen);
  m_currentBrushStack.push(m_currentBrush);
  m_rawFontStack.push(m_rawFont);
226
  m_type3FontStack.push(m_currentType3Font);
227 228
  m_codeToGIDStack.push(m_codeToGID);

229
  m_painter.top()->save();
230 231 232 233
}

void ArthurOutputDev::restoreState(GfxState *state)
{
234
  m_painter.top()->restore();
235 236 237 238 239

  m_codeToGID = m_codeToGIDStack.top();
  m_codeToGIDStack.pop();
  m_rawFont = m_rawFontStack.top();
  m_rawFontStack.pop();
240 241
  m_currentType3Font = m_type3FontStack.top();
  m_type3FontStack.pop();
242 243 244 245
  m_currentBrush = m_currentBrushStack.top();
  m_currentBrushStack.pop();
  m_currentPen = m_currentPenStack.top();
  m_currentPenStack.pop();
246 247 248 249
}

void ArthurOutputDev::updateAll(GfxState *state)
{
250
  OutputDev::updateAll(state);
251 252 253
  m_needFontUpdate = gTrue;
}

254 255 256
// Set CTM (Current Transformation Matrix) to a fixed matrix
void ArthurOutputDev::setDefaultCTM(double *ctm)
{
257
  m_painter.top()->setTransform(QTransform(ctm[0], ctm[1], ctm[2], ctm[3], ctm[4], ctm[5]));
258 259 260 261
}

// Update the CTM (Current Transformation Matrix), i.e., compose the old
// CTM with a new matrix.
262 263 264 265
void ArthurOutputDev::updateCTM(GfxState *state, double m11, double m12,
				double m21, double m22,
				double m31, double m32)
{
266 267 268 269
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
270 271 272 273

  QTransform update(m11, m12, m21, m22, m31, m32);

  // We could also set (rather than update) the painter transformation to state->getCMT();
274
  m_painter.top()->setTransform(update, true);
275 276 277 278
}

void ArthurOutputDev::updateLineDash(GfxState *state)
{
279 280 281 282
  double *dashPattern;
  int dashLength;
  double dashStart;
  state->getLineDash(&dashPattern, &dashLength, &dashStart);
283 284 285 286 287 288 289 290

  // Special handling for zero-length patterns, i.e., solid lines.
  // Simply calling QPen::setDashPattern with an empty pattern does *not*
  // result in a solid line.  Rather, the current pattern is unchanged.
  // See the implementation of the setDashPattern method in the file qpen.cpp.
  if (dashLength==0)
  {
    m_currentPen.setStyle(Qt::SolidLine);
291
    m_painter.top()->setPen(m_currentPen);
292 293 294
    return;
  }

295 296
  QVector<qreal> pattern(dashLength);
  for (int i = 0; i < dashLength; ++i) {
297 298 299
    // pdf measures the dash pattern in dots, but Qt uses the
    // line width as the unit.
    pattern[i] = dashPattern[i] / state->getLineWidth();
300 301 302
  }
  m_currentPen.setDashPattern(pattern);
  m_currentPen.setDashOffset(dashStart);
303
  m_painter.top()->setPen(m_currentPen);
304 305 306 307
}

void ArthurOutputDev::updateFlatness(GfxState *state)
{
308
  // qDebug() << "updateFlatness";
309 310 311 312 313 314
}

void ArthurOutputDev::updateLineJoin(GfxState *state)
{
  switch (state->getLineJoin()) {
  case 0:
315 316 317 318
    // The correct style here is Qt::SvgMiterJoin, *not* Qt::MiterJoin.
    // The two differ in what to do if the miter limit is exceeded.
    // See https://bugs.freedesktop.org/show_bug.cgi?id=102356
    m_currentPen.setJoinStyle(Qt::SvgMiterJoin);
319 320 321 322 323 324 325 326
    break;
  case 1:
    m_currentPen.setJoinStyle(Qt::RoundJoin);
    break;
  case 2:
    m_currentPen.setJoinStyle(Qt::BevelJoin);
    break;
  }
327
  m_painter.top()->setPen(m_currentPen);
328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
}

void ArthurOutputDev::updateLineCap(GfxState *state)
{
  switch (state->getLineCap()) {
  case 0:
    m_currentPen.setCapStyle(Qt::FlatCap);
    break;
  case 1:
    m_currentPen.setCapStyle(Qt::RoundCap);
    break;
  case 2:
    m_currentPen.setCapStyle(Qt::SquareCap);
    break;
  }
343
  m_painter.top()->setPen(m_currentPen);
344 345 346 347
}

void ArthurOutputDev::updateMiterLimit(GfxState *state)
{
Pino Toscano's avatar
Pino Toscano committed
348
  m_currentPen.setMiterLimit(state->getMiterLimit());
349
  m_painter.top()->setPen(m_currentPen);
350 351 352 353
}

void ArthurOutputDev::updateLineWidth(GfxState *state)
{
354
  m_currentPen.setWidthF(state->getLineWidth());
355
  m_painter.top()->setPen(m_currentPen);
356 357 358 359 360
  // The updateLineDash method needs to know the line width, but it is sometimes
  // called before the updateLineWidth method.  To make sure that the last call
  // to updateLineDash before a drawing operation is always with the correct line
  // width, we call it here, right after a change to the line width.
  updateLineDash(state);
361 362 363 364 365 366 367
}

void ArthurOutputDev::updateFillColor(GfxState *state)
{
  GfxRGB rgb;
  QColor brushColour = m_currentBrush.color();
  state->getFillRGB(&rgb);
368
  brushColour.setRgbF(colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b), brushColour.alphaF());
369 370 371 372 373 374 375 376
  m_currentBrush.setColor(brushColour);
}

void ArthurOutputDev::updateStrokeColor(GfxState *state)
{
  GfxRGB rgb;
  QColor penColour = m_currentPen.color();
  state->getStrokeRGB(&rgb);
377
  penColour.setRgbF(colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b), penColour.alphaF());
378
  m_currentPen.setColor(penColour);
379
  m_painter.top()->setPen(m_currentPen);
380 381
}

382 383 384 385 386 387 388 389 390 391 392 393
void ArthurOutputDev::updateBlendMode(GfxState * state)
{
  GfxBlendMode blendMode = state->getBlendMode();

  // missing composition modes in QPainter:
  // - CompositionMode_Hue
  // - CompositionMode_Color
  // - CompositionMode_Luminosity
  // - CompositionMode_Saturation

  switch(blendMode){
  case gfxBlendMultiply:
394
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Multiply);
395 396
    break;
  case gfxBlendScreen:
397
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Screen);
398 399
    break;
  case gfxBlendDarken:
400
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Darken);
401 402
    break;
  case gfxBlendLighten:
403
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Lighten);
404 405
    break;
  case gfxBlendColorDodge:
406
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_ColorDodge);
407 408
    break;
  case gfxBlendColorBurn:
409
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_ColorBurn);
410 411
    break;
  case gfxBlendHardLight:
412
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_HardLight);
413 414
    break;
  case gfxBlendSoftLight:
415
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_SoftLight);
416 417
    break;
  case gfxBlendDifference:
418
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Difference);
419 420
    break;
  case gfxBlendExclusion:
421
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Exclusion);
422 423
    break;
  case gfxBlendColor:
424
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Plus);
425 426 427 428
    break;
  default:
    qDebug() << "Unsupported blend mode, falling back to CompositionMode_SourceOver";
  case gfxBlendNormal:
429
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_SourceOver);
430 431 432 433
    break;
  }
}

434 435 436 437 438 439 440 441 442 443 444 445
void ArthurOutputDev::updateFillOpacity(GfxState *state)
{
  QColor brushColour= m_currentBrush.color();
  brushColour.setAlphaF(state->getFillOpacity());
  m_currentBrush.setColor(brushColour);
}

void ArthurOutputDev::updateStrokeOpacity(GfxState *state)
{
  QColor penColour= m_currentPen.color();
  penColour.setAlphaF(state->getStrokeOpacity());
  m_currentPen.setColor(penColour);
446
  m_painter.top()->setPen(m_currentPen);
447 448 449 450
}

void ArthurOutputDev::updateFont(GfxState *state)
{
451 452
  GfxFont *gfxFont = state->getFont();
  if (!gfxFont)
453 454 455 456
  {
    return;
  }

457
  // The key to look in the font caches
458
  ArthurFontID fontID = {*gfxFont->getID(), state->getFontSize()};
459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480

  // Current font is a type3 font
  if (gfxFont->getType() == fontType3)
  {
    auto cacheEntry = m_type3FontCache.find(fontID);

    if (cacheEntry!=m_type3FontCache.end()) {

      // Take the font from the cache
      m_currentType3Font = cacheEntry->second.get();

    } else {

      m_currentType3Font = new ArthurType3Font(m_doc, (Gfx8BitFont*)gfxFont);
      m_type3FontCache.insert(std::make_pair(fontID,std::unique_ptr<ArthurType3Font>(m_currentType3Font)));

    }

    return;
  }

  // Non-type3: is the font in the cache?
481 482 483 484 485 486 487 488 489 490 491 492
  auto cacheEntry = m_rawFontCache.find(fontID);

  if (cacheEntry!=m_rawFontCache.end()) {

    // Take the font from the cache
    m_rawFont = cacheEntry->second.get();

  } else {

    // New font: load it into the cache
    float fontSize = state->getFontSize();

493
    std::unique_ptr<GfxFontLoc> fontLoc(gfxFont->locateFont(xref, nullptr));
494 495 496 497 498 499

    if (fontLoc) {
      // load the font from respective location
      switch (fontLoc->locType) {
      case gfxFontLocEmbedded: {// if there is an embedded font, read it to memory
        int fontDataLen;
500
        const char* fontData = gfxFont->readEmbFontFile(xref, &fontDataLen);
501 502 503

        m_rawFont = new QRawFont(QByteArray(fontData, fontDataLen), fontSize);
        m_rawFontCache.insert(std::make_pair(fontID,std::unique_ptr<QRawFont>(m_rawFont)));
504 505 506

        // Free the font data, it was copied in the QByteArray constructor
        free((char*)fontData);
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
        break;
      }
      case gfxFontLocExternal:{ // font is in an external font file
        QString fontFile(fontLoc->path->getCString());
        m_rawFont = new QRawFont(fontFile, fontSize);
        m_rawFontCache.insert(std::make_pair(fontID,std::unique_ptr<QRawFont>(m_rawFont)));
        break;
      }
      case gfxFontLocResident:{ // font resides in a PS printer
        qDebug() << "Font Resident Encoding:" << fontLoc->encoding->getCString() << ", not implemented yet!";

      break;
      }
      }// end switch

    } else {
      qDebug() << "Font location not found!";
      return;
    }
  }

  if (!m_rawFont->isValid()) {
    qDebug() << "RawFont is not valid";
  }

  // *****************************************************************************
  //  We have now successfully loaded the font into a QRawFont object.  This
  //  allows us to draw all the glyphs in the font.  However, what is missing is
  //  the charcode-to-glyph-index mapping.  Apparently, Qt does not provide this
  //  information at all.  We therefore now load the font again, this time into
  //  a Splash font object.  This is wasteful, but I see no other way to access
  //  the important glyph-index mapping.
  // *****************************************************************************

541
#ifdef HAVE_SPLASH
542 543
  GfxFontType fontType;
  SplashFontFile *fontFile;
544
  SplashFontSrc *fontsrc = nullptr;
545
  FoFiTrueType *ff;
546
  GooString *fileName;
547
  char *tmpBuf;
Albert Astals Cid's avatar
Albert Astals Cid committed
548
  int tmpBufLen = 0;
Albert Astals Cid's avatar
Albert Astals Cid committed
549
  int *codeToGID;
550
  SplashCoord mat[4] = {0,0,0,0};
Albert Astals Cid's avatar
Albert Astals Cid committed
551
  int n;
552
  int faceIndex = 0;
553 554
  SplashCoord matrix[6] = {1,0,0,1,0,0};
  SplashFTFontFile* ftFontFile;
555 556

  m_needFontUpdate = false;
557 558
  fileName = nullptr;
  tmpBuf = nullptr;
559 560 561

  fontType = gfxFont->getType();
  if (fontType == fontType3) {
562
    return;
563 564
  }

565 566 567
  // Default: no codeToGID table
  m_codeToGID = nullptr;

568
  // check the font file cache
569
  SplashOutFontFileID *id = new SplashOutFontFileID(gfxFont->getID());
570 571 572 573 574
  if ((fontFile = m_fontEngine->getFontFile(id))) {
    delete id;

  } else {

575 576
    std::unique_ptr<GfxFontLoc> fontLoc(gfxFont->locateFont(xref, nullptr));
    if (!fontLoc) {
577 578 579 580 581 582 583 584 585
      error(errSyntaxError, -1, "Couldn't find a font for '{0:s}'",
	    gfxFont->getName() ? gfxFont->getName()->getCString()
	                       : "(unnamed)");
      goto err2;
    }

    // embedded font
    if (fontLoc->locType == gfxFontLocEmbedded) {
      // if there is an embedded font, read it to memory
586 587
      tmpBuf = gfxFont->readEmbFontFile(xref, &tmpBufLen);
      if (! tmpBuf)
588 589
	goto err2;

590 591 592 593
    // external font
    } else { // gfxFontLocExternal
      fileName = fontLoc->path;
      fontType = fontLoc->fontType;
594 595
    }

596 597 598 599
    fontsrc = new SplashFontSrc;
    if (fileName)
      fontsrc->setFile(fileName, gFalse);
    else
600
      fontsrc->setBuf(tmpBuf, tmpBufLen, gTrue);
601
    
602 603 604 605 606
    // load the font file
    switch (fontType) {
    case fontType1:
      if (!(fontFile = m_fontEngine->loadType1Font(
			   id,
607
			   fontsrc,
608
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
609
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
610 611 612 613 614 615 616 617
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontType1C:
      if (!(fontFile = m_fontEngine->loadType1CFont(
			   id,
618
			   fontsrc,
619
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
620
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
621 622 623 624 625
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
626 627 628 629
    case fontType1COT:
      if (!(fontFile = m_fontEngine->loadOpenTypeT1CFont(
			   id,
			   fontsrc,
630
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
631
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
632 633
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
634 635
	goto err2;
      }
636 637 638 639 640 641 642 643 644 645 646 647
      break;
    case fontTrueType:
    case fontTrueTypeOT:
	if (fileName)
	 ff = FoFiTrueType::load(fileName->getCString());
	else
	ff = FoFiTrueType::make(tmpBuf, tmpBufLen);
      if (ff) {
	codeToGID = ((Gfx8BitFont *)gfxFont)->getCodeToGIDMap(ff);
	n = 256;
	delete ff;
      } else {
648
	codeToGID = nullptr;
649 650
	n = 0;
      }
651 652
      if (!(fontFile = m_fontEngine->loadTrueTypeFont(
			   id,
653
			   fontsrc,
654
			   codeToGID, n))) {
655
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
656 657 658 659 660 661 662 663 664
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontCIDType0:
    case fontCIDType0C:
      if (!(fontFile = m_fontEngine->loadCIDFont(
			   id,
665
			   fontsrc))) {
666
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
667 668 669 670 671
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
672
    case fontCIDType0COT:
Albert Astals Cid's avatar
Albert Astals Cid committed
673 674 675 676 677 678
      if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
	n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
	codeToGID = (int *)gmallocn(n, sizeof(int));
	memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
	       n * sizeof(int));
      } else {
679
	codeToGID = nullptr;
Albert Astals Cid's avatar
Albert Astals Cid committed
680 681
	n = 0;
      }      
682 683
      if (!(fontFile = m_fontEngine->loadOpenTypeCFFFont(
			   id,
Albert Astals Cid's avatar
Albert Astals Cid committed
684 685
			   fontsrc,
			   codeToGID, n))) {
686
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
687 688 689 690 691
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
692
    case fontCIDType2:
693
    case fontCIDType2OT:
694
      codeToGID = nullptr;
695 696 697 698
      n = 0;
      if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
	n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
	if (n) {
Albert Astals Cid's avatar
Albert Astals Cid committed
699
	  codeToGID = (int *)gmallocn(n, sizeof(int));
700 701 702 703 704 705 706 707 708 709 710 711 712
	  memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
		  n * sizeof(Gushort));
	}
      } else {
	if (fileName)
	  ff = FoFiTrueType::load(fileName->getCString());
	else
	  ff = FoFiTrueType::make(tmpBuf, tmpBufLen);
	if (! ff)
	  goto err2;
	codeToGID = ((GfxCIDFont *)gfxFont)->getCodeToGIDMap(ff, &n);
	delete ff;
      }
713 714
      if (!(fontFile = m_fontEngine->loadTrueTypeFont(
			   id,
715
			   fontsrc,
716
			   codeToGID, n, faceIndex))) {
717
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
718 719 720 721 722 723 724 725 726 727
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    default:
      // this shouldn't happen
      goto err2;
    }
  }
728

729 730 731
  ftFontFile = dynamic_cast<SplashFTFontFile*>(fontFile);
  if (ftFontFile)
    m_codeToGID = ftFontFile->getCodeToGID();
732

733 734 735 736 737
  // create dummy font
  // The font matrices are bogus, but we will never use the glyphs anyway.
  // However we need to call m_fontEngine->getFont, in order to have the
  // font in the Splash font cache.  Otherwise we'd load it again and again.
  m_fontEngine->getFont(fontFile, mat, matrix);
738

739 740
  if (fontsrc && !fontsrc->isFile)
      fontsrc->unref();
741 742 743 744
  return;

 err2:
  delete id;
745
#endif
746 747
}

748
static QPainterPath convertPath(GfxState *state, GfxPath *path, Qt::FillRule fillRule)
749 750 751 752 753
{
  GfxSubpath *subpath;
  int i, j;

  QPainterPath qPath;
754
  qPath.setFillRule(fillRule);
755 756 757
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
758
      qPath.moveTo(subpath->getX(0), subpath->getY(0));
759 760 761
      j = 1;
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
762 763 764
          qPath.cubicTo( subpath->getX(j),   subpath->getY(j),
                         subpath->getX(j+1), subpath->getY(j+1),
                         subpath->getX(j+2), subpath->getY(j+2));
765 766
	  j += 3;
	} else {
767
	  qPath.lineTo(subpath->getX(j), subpath->getY(j));
768 769 770 771 772 773 774 775 776 777 778 779 780
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	qPath.closeSubpath();
      }
    }
  }
  return qPath;
}

void ArthurOutputDev::stroke(GfxState *state)
{
781
  m_painter.top()->strokePath( convertPath( state, state->getPath(), Qt::OddEvenFill ), m_currentPen );
782 783 784 785
}

void ArthurOutputDev::fill(GfxState *state)
{
786
  m_painter.top()->fillPath( convertPath( state, state->getPath(), Qt::WindingFill ), m_currentBrush );
787 788 789 790
}

void ArthurOutputDev::eoFill(GfxState *state)
{
791
  m_painter.top()->fillPath( convertPath( state, state->getPath(), Qt::OddEvenFill ), m_currentBrush );
792 793
}

794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919
GBool ArthurOutputDev::axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax)
{
  double x0, y0, x1, y1;
  shading->getCoords(&x0, &y0, &x1, &y1);

  // get the clip region bbox
  double xMin, yMin, xMax, yMax;
  state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);

  // get the function domain
  double t0 = shading->getDomain0();
  double t1 = shading->getDomain1();

  // Max number of splits along the t axis
  constexpr int maxSplits = 256;

  // Max delta allowed in any color component
  const double colorDelta = (dblToCol(1 / 256.0));

  // Number of color space components
  auto nComps = shading->getColorSpace()->getNComps();

  // Helper function to test two color objects for 'almost-equality'
  auto isSameGfxColor = [&nComps,&colorDelta](const GfxColor &colorA, const GfxColor &colorB)
                        {
                          for (int k = 0; k < nComps; ++k) {
                            if (abs(colorA.c[k] - colorB.c[k]) > colorDelta) {
                              return false;
                            }
                          }
                          return true;
                        };

  // Helper function: project a number into an interval
  // With C++17 this is part of the standard library
  auto clamp = [](double v, double lo, double hi)
                  { return std::min(std::max(v,lo), hi); };

  // ta stores all parameter values where we evaluate the input shading function.
  // In between, QLinearGradient will interpolate linearly.
  // We set up the array with three values.
  std::array<double, maxSplits+1> ta;
  ta[0] = tMin;
  std::array<int, maxSplits+1> next;
  next[0] = maxSplits / 2;
  ta[maxSplits / 2] = 0.5 * (tMin + tMax);
  next[maxSplits / 2] = maxSplits;
  ta[maxSplits] = tMax;

  // compute the color at t = tMin
  double tt = clamp(t0 + (t1 - t0) * tMin, t0, t1);

  GfxColor color0, color1;
  shading->getColor(tt, &color0);

  // Construct a gradient object and set its color at one parameter end
  QLinearGradient gradient(QPointF(x0 + tMin * (x1 - x0), y0 + tMin * (y1 - y0)),
                           QPointF(x0 + tMax * (x1 - x0), y0 + tMax * (y1 - y0)));

  GfxRGB rgb;
  shading->getColorSpace()->getRGB(&color0, &rgb);
  QColor qColor(colToByte(rgb.r), colToByte(rgb.g), colToByte(rgb.b));
  gradient.setColorAt(0,qColor);

  // Look for more relevant parameter values by bisection
  int i = 0;
  while (i < maxSplits) {

    int j = next[i];
    while (j > i + 1) {

      // Next parameter value to try
      tt = clamp(t0 + (t1 - t0) * ta[j], t0, t1);
      shading->getColor(tt, &color1);

      // j is a good next color stop if the input shading can be approximated well
      // on the interval (ta[i], ta[j]) by a linear interpolation.
      // We test this by comparing the real color in the middle between ta[i] and ta[j]
      // with the linear interpolant there.
      auto midPoint = 0.5 * (ta[i] + ta[j]);
      GfxColor colorAtMidPoint;
      shading->getColor(midPoint, &colorAtMidPoint);

      GfxColor linearlyInterpolatedColor;
      for (int ii=0; ii<nComps; ii++)
        linearlyInterpolatedColor.c[ii] = 0.5 * (color0.c[ii] + color1.c[ii]);

      // If the two colors are equal, ta[j] is a good place for the next color stop; take it!
      if (isSameGfxColor(colorAtMidPoint, linearlyInterpolatedColor))
        break;

      // Otherwise: bisect further
      int k = (i + j) / 2;
      ta[k] = midPoint;
      next[i] = k;
      next[k] = j;
      j = k;
    }

    // set the color
    GfxRGB rgb;
    shading->getColorSpace()->getRGB(&color1, &rgb);
    qColor.setRgb(colToByte(rgb.r), colToByte(rgb.g), colToByte(rgb.b));
    gradient.setColorAt((ta[j] - tMin)/(tMax - tMin), qColor);

    // Move to the next parameter region
    color0 = color1;
    i = next[i];
  }

  state->moveTo(xMin, yMin);
  state->lineTo(xMin, yMax);
  state->lineTo(xMax, yMax);
  state->lineTo(xMax, yMin);
  state->closePath();

  // Actually paint the shaded region
  QBrush newBrush(gradient);
  m_painter.top()->fillPath( convertPath( state, state->getPath(), Qt::WindingFill ), newBrush );

  state->clearPath();

  // True means: The shaded region has been painted
  return gTrue;
}

920 921
void ArthurOutputDev::clip(GfxState *state)
{
922
  m_painter.top()->setClipPath(convertPath( state, state->getPath(), Qt::WindingFill ), Qt::IntersectClip );
923 924 925 926
}

void ArthurOutputDev::eoClip(GfxState *state)
{
927
  m_painter.top()->setClipPath(convertPath( state, state->getPath(), Qt::OddEvenFill ), Qt::IntersectClip );
928 929
}

930 931 932
void ArthurOutputDev::drawChar(GfxState *state, double x, double y,
			       double dx, double dy,
			       double originX, double originY,
933
			       CharCode code, int nBytes, Unicode *u, int uLen) {
934

935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980
  // First handle type3 fonts
  GfxFont *gfxFont = state->getFont();

  GfxFontType fontType = gfxFont->getType();
  if (fontType == fontType3) {

    /////////////////////////////////////////////////////////////////////
    //  Draw the QPicture that contains the glyph onto the page
    /////////////////////////////////////////////////////////////////////

    // Store the QPainter state; we need to modify it temporarily
    m_painter.top()->save();

    // Make the glyph position the coordinate origin -- that's our center of scaling
    m_painter.top()->translate(QPointF(x-originX, y-originY));

    const double* mat = gfxFont->getFontMatrix();
    QTransform fontMatrix(mat[0], mat[1], mat[2], mat[3], mat[4], mat[5]);

    // Scale with the font size
    fontMatrix.scale(state->getFontSize(), state->getFontSize());
    m_painter.top()->setTransform(fontMatrix,true);

    // Apply the text matrix on top
    const double *textMat = state->getTextMat();

    QTransform textTransform(textMat[0] * state->getHorizScaling(),
                             textMat[1] * state->getHorizScaling(),
                             textMat[2],
                             textMat[3],
                             0,
                             0);

    m_painter.top()->setTransform(textTransform,true);

    // Actually draw the glyph
    int gid = m_currentType3Font->codeToGID[code];
    m_painter.top()->drawPicture(QPointF(0,0), m_currentType3Font->getGlyph(gid));

    // Restore transformation
    m_painter.top()->restore();

    return;
  }


981
  // check for invisible text -- this is used by Acrobat Capture
982 983 984
  int render = state->getRender();
  if (render == 3 || !m_rawFont) {
    qDebug() << "Invisible text found!";
985 986 987
    return;
  }

988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003
  if (!(render & 1))
  {
    quint32 glyphIndex = (m_codeToGID) ? m_codeToGID[code] : code;
    QPointF glyphPosition = QPointF(x-originX, y-originY);

    // QGlyphRun objects can hold an entire sequence of glyphs, and it would possibly
    // be more efficient to simply note the glyph and glyph position here and then
    // draw several glyphs at once in the endString method.  What keeps us from doing
    // that is the transformation below: each glyph needs to be drawn upside down,
    // i.e., reflected at its own baseline.  Since we have no guarantee that this
    // baseline is the same for all glyphs in a string we have to do it one by one.
    QGlyphRun glyphRun;
    glyphRun.setRawData(&glyphIndex, &glyphPosition, 1);
    glyphRun.setRawFont(*m_rawFont);

    // Store the QPainter state; we need to modify it temporarily
1004
    m_painter.top()->save();
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014

    // Apply the text matrix to the glyph.  The glyph is not scaled by the font size,
    // because the font in m_rawFont already has the correct size.
    // Additionally, the CTM is upside down, i.e., it contains a negative Y-scaling
    // entry.  Therefore, Qt will paint the glyphs upside down.  We need to temporarily
    // reflect the page at glyphPosition.y().

    // Make the glyph position the coordinate origin -- that's our center of scaling
    const double *textMat = state->getTextMat();

1015
    m_painter.top()->translate(QPointF(glyphPosition.x(),glyphPosition.y()));
1016 1017 1018 1019 1020 1021 1022 1023

    QTransform textTransform(textMat[0] * state->getHorizScaling(),
                             textMat[1] * state->getHorizScaling(),
                             -textMat[2], // reflect at the horizontal axis,
                             -textMat[3], // because CTM is upside-down.
                             0,
                             0);

1024
    m_painter.top()->setTransform(textTransform,true);
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036

    // We are painting a filled glyph here.  But QPainter uses the pen to draw even filled text,
    // not the brush.  (see, e.g.,  http://doc.qt.io/qt-5/qpainter.html#setPen )
    // Therefore we have to temporarily overwrite the pen color.

    // Since we are drawing a filled glyph, one would really expect to have m_currentBrush
    // have the correct color.  However, somehow state->getFillRGB can change without
    // updateFillColor getting called.  Then m_currentBrush may not contain the correct color.
    GfxRGB rgb;
    state->getFillRGB(&rgb);
    QColor fontColor;
    fontColor.setRgbF(colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b), state->getFillOpacity());
1037
    m_painter.top()->setPen(fontColor);
1038 1039

    // Actually draw the glyph
1040
    m_painter.top()->drawGlyphRun(QPointF(-glyphPosition.x(),-glyphPosition.y()), glyphRun);
1041 1042

    // Restore transformation and pen color
1043
    m_painter.top()->restore();
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
  }
}

void ArthurOutputDev::type3D0(GfxState *state, double wx, double wy)
{
}

void ArthurOutputDev::type3D1(GfxState *state, double wx, double wy,
			      double llx, double lly, double urx, double ury)
{
}

void ArthurOutputDev::endTextObject(GfxState *state)
{
}


void ArthurOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
				    int width, int height, GBool invert,
1063
				    GBool interpolate, GBool inlineImg)
1064
{
1065 1066 1067 1068 1069
  auto imgStr = std::make_unique<ImageStream>(
	str, width,
	1,  // numPixelComps
	1  // getBits
  );
1070 1071
  imgStr->reset();

1072 1073 1074 1075
  // TODO: Would using QImage::Format_Mono be more efficient here?
  QImage image(width, height, QImage::Format_ARGB32);
  unsigned int *data = (unsigned int *)image.bits();
  int stride = image.bytesPerLine()/4;
1076

1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
  QRgb fillColor = m_currentBrush.color().rgb();

  for (int y = 0; y < height; y++) {

    Guchar *pix = imgStr->getLine();

    // Invert the vertical coordinate: y is increasing from top to bottom
    // on the page, but y is increasing bottom to top in the picture.
    unsigned int* dest = data + (height-1-y) * stride;

    for (int x = 0; x < width; x++) {

      bool opaque = ((bool)pix[x]) == invert;
      dest[x] = (opaque) ? fillColor : 0;
1091 1092 1093 1094

    }
  }

1095 1096 1097
  // At this point, the QPainter coordinate transformation (CTM) is such
  // that QRect(0,0,1,1) is exactly the area of the image.
  m_painter.top()->drawImage( QRect(0,0,1,1), image );
1098
  imgStr->close ();
1099 1100 1101 1102 1103 1104
}

//TODO: lots more work here.
void ArthurOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
				int width, int height,
				GfxImageColorMap *colorMap,
1105
				GBool interpolate, int *maskColors, GBool inlineImg)
1106
{
1107 1108
  unsigned int *data;
  unsigned int *line;
1109 1110
  int x, y;
  Guchar *pix;
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
1111
  int i;
1112 1113
  QImage image;
  int stride;
1114 1115