ArthurOutputDev.cc 38.2 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 30 31
//
// 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
32 33 34 35 36 37 38 39 40 41 42 43
//
//========================================================================

#include <config.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

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

44 45
#include <array>

46 47 48 49 50 51 52 53 54 55
#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"
56 57 58
#include "Page.h"
#include "Gfx.h"
#include "PDFDoc.h"
59 60

#include <QtCore/QtDebug>
61 62
#include <QRawFont>
#include <QGlyphRun>
63
#include <QtGui/QPainterPath>
64 65
#include <QPicture>

66 67
//------------------------------------------------------------------------

68
#ifdef HAVE_SPLASH
69
#include "splash/SplashFontFileID.h"
70
#include "splash/SplashFTFontFile.h"
71 72 73 74 75 76 77 78
#include "splash/SplashFontEngine.h"
//------------------------------------------------------------------------
// SplashOutFontFileID
//------------------------------------------------------------------------

class SplashOutFontFileID: public SplashFontFileID {
public:

79
  SplashOutFontFileID(const Ref *rA) { r = *rA; }
80 81 82

  ~SplashOutFontFileID() {}

Albert Astals Cid's avatar
Albert Astals Cid committed
83
  GBool matches(SplashFontFileID *id) override {
84 85 86 87 88 89 90 91 92
    return ((SplashOutFontFileID *)id)->r.num == r.num &&
           ((SplashOutFontFileID *)id)->r.gen == r.gen;
  }

private:

  Ref r;
};

93
#endif
94

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
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;
152
    glyphs[gid] = std::make_unique<QPicture>();
153
    glyphPainter.begin(glyphs[gid].get());
154
    auto output_dev = std::make_unique<ArthurOutputDev>(&glyphPainter);
155

156 157 158 159 160
    auto gfx = std::make_unique<Gfx>(
	  m_doc, output_dev.get(), resDict,
	  &box,  // pagebox
	  nullptr  // cropBox
    );
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176

    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];
}


177 178 179 180 181
//------------------------------------------------------------------------
// ArthurOutputDev
//------------------------------------------------------------------------

ArthurOutputDev::ArthurOutputDev(QPainter *painter):
182
  m_lastTransparencyGroupPicture(nullptr),
183
  m_fontHinting(NoHinting)
184
{
185
  m_painter.push(painter);
186
  m_currentBrush = QBrush(Qt::SolidPattern);
187
  m_fontEngine = nullptr;
188 189 190 191
}

ArthurOutputDev::~ArthurOutputDev()
{
192
#ifdef HAVE_SPLASH
193
  delete m_fontEngine;
194
#endif
195 196
}

197 198 199
void ArthurOutputDev::startDoc(PDFDoc* doc) {
  xref = doc->getXRef();
  m_doc = doc;
200
#ifdef HAVE_SPLASH
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
201
  delete m_fontEngine;
202 203 204 205

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

206
  m_fontEngine = new SplashFontEngine(
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
207
  globalParams->getEnableFreeType(),
208 209
  isHintingEnabled,
  isSlightHinting,
210
  m_painter.top()->testRenderHint(QPainter::TextAntialiasing));
211
#endif
212 213
}

Albert Astals Cid's avatar
Albert Astals Cid committed
214
void ArthurOutputDev::startPage(int pageNum, GfxState *state, XRef *)
215
{}
216 217 218 219 220 221

void ArthurOutputDev::endPage() {
}

void ArthurOutputDev::saveState(GfxState *state)
{
222 223 224
  m_currentPenStack.push(m_currentPen);
  m_currentBrushStack.push(m_currentBrush);
  m_rawFontStack.push(m_rawFont);
225
  m_type3FontStack.push(m_currentType3Font);
226 227
  m_codeToGIDStack.push(m_codeToGID);

228
  m_painter.top()->save();
229 230 231 232
}

void ArthurOutputDev::restoreState(GfxState *state)
{
233
  m_painter.top()->restore();
234 235 236 237 238

  m_codeToGID = m_codeToGIDStack.top();
  m_codeToGIDStack.pop();
  m_rawFont = m_rawFontStack.top();
  m_rawFontStack.pop();
239 240
  m_currentType3Font = m_type3FontStack.top();
  m_type3FontStack.pop();
241 242 243 244
  m_currentBrush = m_currentBrushStack.top();
  m_currentBrushStack.pop();
  m_currentPen = m_currentPenStack.top();
  m_currentPenStack.pop();
245 246 247 248
}

void ArthurOutputDev::updateAll(GfxState *state)
{
249
  OutputDev::updateAll(state);
250 251 252
  m_needFontUpdate = gTrue;
}

253 254 255
// Set CTM (Current Transformation Matrix) to a fixed matrix
void ArthurOutputDev::setDefaultCTM(double *ctm)
{
256
  m_painter.top()->setTransform(QTransform(ctm[0], ctm[1], ctm[2], ctm[3], ctm[4], ctm[5]));
257 258 259 260
}

// Update the CTM (Current Transformation Matrix), i.e., compose the old
// CTM with a new matrix.
261 262 263 264
void ArthurOutputDev::updateCTM(GfxState *state, double m11, double m12,
				double m21, double m22,
				double m31, double m32)
{
265 266 267 268
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
269 270 271 272

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

  // We could also set (rather than update) the painter transformation to state->getCMT();
273
  m_painter.top()->setTransform(update, true);
274 275 276 277
}

void ArthurOutputDev::updateLineDash(GfxState *state)
{
278 279 280 281
  double *dashPattern;
  int dashLength;
  double dashStart;
  state->getLineDash(&dashPattern, &dashLength, &dashStart);
282 283 284 285 286 287 288 289

  // 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);
290
    m_painter.top()->setPen(m_currentPen);
291 292 293
    return;
  }

294 295
  QVector<qreal> pattern(dashLength);
  for (int i = 0; i < dashLength; ++i) {
296 297 298
    // pdf measures the dash pattern in dots, but Qt uses the
    // line width as the unit.
    pattern[i] = dashPattern[i] / state->getLineWidth();
299 300 301
  }
  m_currentPen.setDashPattern(pattern);
  m_currentPen.setDashOffset(dashStart);
302
  m_painter.top()->setPen(m_currentPen);
303 304 305 306
}

void ArthurOutputDev::updateFlatness(GfxState *state)
{
307
  // qDebug() << "updateFlatness";
308 309 310 311 312 313
}

void ArthurOutputDev::updateLineJoin(GfxState *state)
{
  switch (state->getLineJoin()) {
  case 0:
314 315 316 317
    // 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);
318 319 320 321 322 323 324 325
    break;
  case 1:
    m_currentPen.setJoinStyle(Qt::RoundJoin);
    break;
  case 2:
    m_currentPen.setJoinStyle(Qt::BevelJoin);
    break;
  }
326
  m_painter.top()->setPen(m_currentPen);
327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
}

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;
  }
342
  m_painter.top()->setPen(m_currentPen);
343 344 345 346
}

void ArthurOutputDev::updateMiterLimit(GfxState *state)
{
Pino Toscano's avatar
Pino Toscano committed
347
  m_currentPen.setMiterLimit(state->getMiterLimit());
348
  m_painter.top()->setPen(m_currentPen);
349 350 351 352
}

void ArthurOutputDev::updateLineWidth(GfxState *state)
{
353
  m_currentPen.setWidthF(state->getLineWidth());
354
  m_painter.top()->setPen(m_currentPen);
355 356 357 358 359
  // 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);
360 361 362 363 364 365 366
}

void ArthurOutputDev::updateFillColor(GfxState *state)
{
  GfxRGB rgb;
  QColor brushColour = m_currentBrush.color();
  state->getFillRGB(&rgb);
367
  brushColour.setRgbF(colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b), brushColour.alphaF());
368 369 370 371 372 373 374 375
  m_currentBrush.setColor(brushColour);
}

void ArthurOutputDev::updateStrokeColor(GfxState *state)
{
  GfxRGB rgb;
  QColor penColour = m_currentPen.color();
  state->getStrokeRGB(&rgb);
376
  penColour.setRgbF(colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b), penColour.alphaF());
377
  m_currentPen.setColor(penColour);
378
  m_painter.top()->setPen(m_currentPen);
379 380
}

381 382 383 384 385 386 387 388 389 390 391 392
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:
393
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Multiply);
394 395
    break;
  case gfxBlendScreen:
396
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Screen);
397 398
    break;
  case gfxBlendDarken:
399
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Darken);
400 401
    break;
  case gfxBlendLighten:
402
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Lighten);
403 404
    break;
  case gfxBlendColorDodge:
405
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_ColorDodge);
406 407
    break;
  case gfxBlendColorBurn:
408
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_ColorBurn);
409 410
    break;
  case gfxBlendHardLight:
411
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_HardLight);
412 413
    break;
  case gfxBlendSoftLight:
414
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_SoftLight);
415 416
    break;
  case gfxBlendDifference:
417
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Difference);
418 419
    break;
  case gfxBlendExclusion:
420
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Exclusion);
421 422
    break;
  case gfxBlendColor:
423
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_Plus);
424 425 426 427
    break;
  default:
    qDebug() << "Unsupported blend mode, falling back to CompositionMode_SourceOver";
  case gfxBlendNormal:
428
    m_painter.top()->setCompositionMode(QPainter::CompositionMode_SourceOver);
429 430 431 432
    break;
  }
}

433 434 435 436 437 438 439 440 441 442 443 444
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);
445
  m_painter.top()->setPen(m_currentPen);
446 447 448 449
}

void ArthurOutputDev::updateFont(GfxState *state)
{
450 451
  GfxFont *gfxFont = state->getFont();
  if (!gfxFont)
452 453 454 455
  {
    return;
  }

456
  // The key to look in the font caches
457
  ArthurFontID fontID = {*gfxFont->getID(), state->getFontSize()};
458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479

  // 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?
480 481 482 483 484 485 486 487 488 489 490 491
  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();

492
    std::unique_ptr<GfxFontLoc> fontLoc(gfxFont->locateFont(xref, nullptr));
493 494 495 496 497 498

    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;
499
        const char* fontData = gfxFont->readEmbFontFile(xref, &fontDataLen);
500 501 502

        m_rawFont = new QRawFont(QByteArray(fontData, fontDataLen), fontSize);
        m_rawFontCache.insert(std::make_pair(fontID,std::unique_ptr<QRawFont>(m_rawFont)));
503 504 505

        // Free the font data, it was copied in the QByteArray constructor
        free((char*)fontData);
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539
        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.
  // *****************************************************************************

540
#ifdef HAVE_SPLASH
541 542
  GfxFontType fontType;
  SplashFontFile *fontFile;
543
  SplashFontSrc *fontsrc = nullptr;
544
  FoFiTrueType *ff;
545
  GooString *fileName;
546
  char *tmpBuf;
Albert Astals Cid's avatar
Albert Astals Cid committed
547
  int tmpBufLen = 0;
Albert Astals Cid's avatar
Albert Astals Cid committed
548
  int *codeToGID;
549
  SplashCoord mat[4] = {0,0,0,0};
Albert Astals Cid's avatar
Albert Astals Cid committed
550
  int n;
551
  int faceIndex = 0;
552 553
  SplashCoord matrix[6] = {1,0,0,1,0,0};
  SplashFTFontFile* ftFontFile;
554 555

  m_needFontUpdate = false;
556 557
  fileName = nullptr;
  tmpBuf = nullptr;
558 559 560

  fontType = gfxFont->getType();
  if (fontType == fontType3) {
561
    return;
562 563
  }

564 565 566
  // Default: no codeToGID table
  m_codeToGID = nullptr;

567
  // check the font file cache
568
  SplashOutFontFileID *id = new SplashOutFontFileID(gfxFont->getID());
569 570 571 572 573
  if ((fontFile = m_fontEngine->getFontFile(id))) {
    delete id;

  } else {

574 575
    std::unique_ptr<GfxFontLoc> fontLoc(gfxFont->locateFont(xref, nullptr));
    if (!fontLoc) {
576 577 578 579 580 581 582 583 584
      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
585 586
      tmpBuf = gfxFont->readEmbFontFile(xref, &tmpBufLen);
      if (! tmpBuf)
587 588
	goto err2;

589 590 591 592
    // external font
    } else { // gfxFontLocExternal
      fileName = fontLoc->path;
      fontType = fontLoc->fontType;
593 594
    }

595 596 597 598
    fontsrc = new SplashFontSrc;
    if (fileName)
      fontsrc->setFile(fileName, gFalse);
    else
599
      fontsrc->setBuf(tmpBuf, tmpBufLen, gTrue);
600
    
601 602 603 604 605
    // load the font file
    switch (fontType) {
    case fontType1:
      if (!(fontFile = m_fontEngine->loadType1Font(
			   id,
606
			   fontsrc,
607
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
608
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
609 610 611 612 613 614 615 616
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontType1C:
      if (!(fontFile = m_fontEngine->loadType1CFont(
			   id,
617
			   fontsrc,
618
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
619
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
620 621 622 623 624
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
625 626 627 628
    case fontType1COT:
      if (!(fontFile = m_fontEngine->loadOpenTypeT1CFont(
			   id,
			   fontsrc,
629
			   (const char **)((Gfx8BitFont *)gfxFont)->getEncoding()))) {
630
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
631 632
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
633 634
	goto err2;
      }
635 636 637 638 639 640 641 642 643 644 645 646
      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 {
647
	codeToGID = nullptr;
648 649
	n = 0;
      }
650 651
      if (!(fontFile = m_fontEngine->loadTrueTypeFont(
			   id,
652
			   fontsrc,
653
			   codeToGID, n))) {
654
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
655 656 657 658 659 660 661 662 663
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontCIDType0:
    case fontCIDType0C:
      if (!(fontFile = m_fontEngine->loadCIDFont(
			   id,
664
			   fontsrc))) {
665
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
666 667 668 669 670
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
671
    case fontCIDType0COT:
Albert Astals Cid's avatar
Albert Astals Cid committed
672 673 674 675 676 677
      if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
	n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
	codeToGID = (int *)gmallocn(n, sizeof(int));
	memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
	       n * sizeof(int));
      } else {
678
	codeToGID = nullptr;
Albert Astals Cid's avatar
Albert Astals Cid committed
679 680
	n = 0;
      }      
681 682
      if (!(fontFile = m_fontEngine->loadOpenTypeCFFFont(
			   id,
Albert Astals Cid's avatar
Albert Astals Cid committed
683 684
			   fontsrc,
			   codeToGID, n))) {
685
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
686 687 688 689 690
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
691
    case fontCIDType2:
692
    case fontCIDType2OT:
693
      codeToGID = nullptr;
694 695 696 697
      n = 0;
      if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
	n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
	if (n) {
Albert Astals Cid's avatar
Albert Astals Cid committed
698
	  codeToGID = (int *)gmallocn(n, sizeof(int));
699 700 701 702 703 704 705 706 707 708 709 710 711
	  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;
      }
712 713
      if (!(fontFile = m_fontEngine->loadTrueTypeFont(
			   id,
714
			   fontsrc,
715
			   codeToGID, n, faceIndex))) {
716
	error(errSyntaxError, -1, "Couldn't create a font for '{0:s}'",
717 718 719 720 721 722 723 724 725 726
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    default:
      // this shouldn't happen
      goto err2;
    }
  }
727

728 729 730
  ftFontFile = dynamic_cast<SplashFTFontFile*>(fontFile);
  if (ftFontFile)
    m_codeToGID = ftFontFile->getCodeToGID();
731

732 733 734 735 736
  // 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);
737

738 739
  if (fontsrc && !fontsrc->isFile)
      fontsrc->unref();
740 741 742 743
  return;

 err2:
  delete id;
744
#endif
745 746
}

747
static QPainterPath convertPath(GfxState *state, GfxPath *path, Qt::FillRule fillRule)
748 749 750 751 752
{
  GfxSubpath *subpath;
  int i, j;

  QPainterPath qPath;
753
  qPath.setFillRule(fillRule);
754 755 756
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
757
      qPath.moveTo(subpath->getX(0), subpath->getY(0));
758 759 760
      j = 1;
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
761 762 763
          qPath.cubicTo( subpath->getX(j),   subpath->getY(j),
                         subpath->getX(j+1), subpath->getY(j+1),
                         subpath->getX(j+2), subpath->getY(j+2));
764 765
	  j += 3;
	} else {
766
	  qPath.lineTo(subpath->getX(j), subpath->getY(j));
767 768 769 770 771 772 773 774 775 776 777 778 779
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	qPath.closeSubpath();
      }
    }
  }
  return qPath;
}

void ArthurOutputDev::stroke(GfxState *state)
{
780
  m_painter.top()->strokePath( convertPath( state, state->getPath(), Qt::OddEvenFill ), m_currentPen );
781 782 783 784
}

void ArthurOutputDev::fill(GfxState *state)
{
785
  m_painter.top()->fillPath( convertPath( state, state->getPath(), Qt::WindingFill ), m_currentBrush );
786 787 788 789
}

void ArthurOutputDev::eoFill(GfxState *state)
{
790
  m_painter.top()->fillPath( convertPath( state, state->getPath(), Qt::OddEvenFill ), m_currentBrush );
791 792
}

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
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;
}

919 920
void ArthurOutputDev::clip(GfxState *state)
{
921
  m_painter.top()->setClipPath(convertPath( state, state->getPath(), Qt::WindingFill ), Qt::IntersectClip );
922 923 924 925
}

void ArthurOutputDev::eoClip(GfxState *state)
{
926
  m_painter.top()->setClipPath(convertPath( state, state->getPath(), Qt::OddEvenFill ), Qt::IntersectClip );
927 928
}

929 930 931
void ArthurOutputDev::drawChar(GfxState *state, double x, double y,
			       double dx, double dy,
			       double originX, double originY,
932
			       CharCode code, int nBytes, Unicode *u, int uLen) {
933

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
  // 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;
  }


980
  // check for invisible text -- this is used by Acrobat Capture
981 982 983
  int render = state->getRender();
  if (render == 3 || !m_rawFont) {
    qDebug() << "Invisible text found!";
984 985 986
    return;
  }

987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
  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
1003
    m_painter.top()->save();
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013

    // 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();

1014
    m_painter.top()->translate(QPointF(glyphPosition.x(),glyphPosition.y()));
1015 1016 1017 1018 1019 1020 1021 1022

    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);

1023
    m_painter.top()->setTransform(textTransform,true);
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035

    // 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());
1036
    m_painter.top()->setPen(fontColor);
1037 1038

    // Actually draw the glyph
1039
    m_painter.top()->drawGlyphRun(QPointF(-glyphPosition.x(),-glyphPosition.y()), glyphRun);
1040 1041

    // Restore transformation and pen color
1042
    m_painter.top()->restore();
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
  }
}

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,
1062
				    GBool interpolate, GBool inlineImg)
1063
{
1064 1065 1066 1067 1068
  auto imgStr = std::make_unique<ImageStream>(
	str, width,
	1,  // numPixelComps
	1  // getBits
  );
1069 1070
  imgStr->reset();

1071 1072 1073 1074
  // 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;
1075

1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
  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;
1090 1091 1092 1093

    }
  }

1094 1095 1096
  // 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 );
1097
  imgStr->close ();
1098 1099 1100 1101 1102 1103
}

//TODO: lots more work here.
void ArthurOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
				int width, int height,
				GfxImageColorMap *colorMap,
1104
				GBool interpolate, int *maskColors, GBool inlineImg)
1105
{
1106 1107
  unsigned int *data;
  unsigned int *line;
1108 1109
  int x, y;
  Guchar *pix;
Krzysztof Kowalczyk's avatar
Krzysztof Kowalczyk committed
1110
  int i;
1111 1112
  QImage image;
  int stride;
1113 1114
  
  /* TODO: Do we want to cache these? */
1115