CairoOutputDev.cc 56 KB
Newer Older
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1 2 3 4 5 6 7 8
//========================================================================
//
// CairoOutputDev.cc
//
// Copyright 2003 Glyph & Cog, LLC
// Copyright 2004 Red Hat, Inc
//
//========================================================================
9 10 11 12 13

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
14 15 16
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
17 18 19 20 21 22 23 24 25 26 27 28 29 30
// Copyright (C) 2005-2008 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
// Copyright (C) 2006-2008 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2008 Carl Worth <cworth@cworth.org>
// Copyright (C) 2008 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
// Copyright (C) 2008 Chris Wilson <chris@chris-wilson.co.uk>
//
// 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
//
//========================================================================
Kristian Høgsberg's avatar
Kristian Høgsberg committed
31 32 33 34 35 36 37 38 39

#include <config.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

#include <string.h>
#include <math.h>
40
#include <assert.h>
Kristian Høgsberg's avatar
Kristian Høgsberg committed
41 42 43 44 45 46 47 48 49 50 51
#include <cairo.h>

#include "goo/gfile.h"
#include "GlobalParams.h"
#include "Error.h"
#include "Object.h"
#include "GfxState.h"
#include "GfxFont.h"
#include "Link.h"
#include "CharCodeToUnicode.h"
#include "FontEncodingTables.h"
52
#include "PDFDocEncoding.h"
Kristian Høgsberg's avatar
Kristian Høgsberg committed
53 54 55 56 57 58
#include <fofi/FoFiTrueType.h>
#include <splash/SplashBitmap.h>
#include "CairoOutputDev.h"
#include "CairoFontEngine.h"
//------------------------------------------------------------------------

59
// #define LOG_CAIRO
Kristian Høgsberg's avatar
Kristian Høgsberg committed
60 61 62 63 64 65 66

#ifdef LOG_CAIRO
#define LOG(x) (x)
#else
#define LOG(x)
#endif

67 68 69 70 71 72
static inline void printMatrix(cairo_matrix_t *matrix){
	printf("%f %f, %f %f (%f %f)\n", matrix->xx, matrix->yx,
			matrix->xy, matrix->yy,
			matrix->x0, matrix->y0);
}

73 74 75 76
//------------------------------------------------------------------------
// CairoImage
//------------------------------------------------------------------------

77 78
CairoImage::CairoImage (double x1, double y1, double x2, double y2) {
  this->image = NULL;
79 80 81 82 83 84 85 86 87 88
  this->x1 = x1;
  this->y1 = y1;
  this->x2 = x2;
  this->y2 = y2;
}

CairoImage::~CairoImage () {
  if (image)
    cairo_surface_destroy (image);
}
Kristian Høgsberg's avatar
Kristian Høgsberg committed
89

90 91 92 93 94 95
void CairoImage::setImage (cairo_surface_t *image) {
  if (this->image)
    cairo_surface_destroy (this->image);
  this->image = cairo_surface_reference (image);
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
96 97 98 99
//------------------------------------------------------------------------
// CairoOutputDev
//------------------------------------------------------------------------

100 101 102 103 104 105 106 107 108
// We cannot tie the lifetime of an FT_Library object to that of
// CairoOutputDev, since any FT_Faces created with it may end up with a
// reference by Cairo which can be held long after the CairoOutputDev is
// deleted.  The simplest way to avoid problems is to never tear down the
// FT_Library instance; to avoid leaks, just use a single global instance
// initialized the first time it is needed.
FT_Library CairoOutputDev::ft_lib;
GBool CairoOutputDev::ft_lib_initialized = gFalse;

109
CairoOutputDev::CairoOutputDev() {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
110
  xref = NULL;
111
  catalog = NULL;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
112

113 114 115 116 117
  if (!ft_lib_initialized) {
    FT_Init_FreeType(&ft_lib);
    ft_lib_initialized = gTrue;
  }

Kristian Høgsberg's avatar
Kristian Høgsberg committed
118
  fontEngine = NULL;
119
  fontEngine_owner = gFalse;
120
  glyphs = NULL;
121 122
  fill_pattern = NULL;
  stroke_pattern = NULL;
123 124
  stroke_opacity = 1.0;
  fill_opacity = 1.0;
125
  textClipPath = NULL;
126
  cairo = NULL;
127
  currentFont = NULL;
128
  prescaleImages = gTrue;
129
  printing = gTrue;
130
  inType3Char = gFalse;
131
  t3_glyph_has_bbox = gFalse;
132 133 134 135

  groupColorSpaceStack = NULL;
  group = NULL;
  mask = NULL;
136 137 138
  shape = NULL;
  cairo_shape = NULL;
  knockoutCount = 0;
139 140 141

  text = NULL;
  actualTextBMCLevel = 0;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
142 143 144
}

CairoOutputDev::~CairoOutputDev() {
145
  if (fontEngine_owner && fontEngine) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
146 147
    delete fontEngine;
  }
148

149 150
  if (cairo)
    cairo_destroy (cairo);
151 152
  cairo_pattern_destroy (stroke_pattern);
  cairo_pattern_destroy (fill_pattern);
153 154
  if (group)
    cairo_pattern_destroy (group);
Chris Wilson's avatar
Chris Wilson committed
155 156
  if (mask)
    cairo_pattern_destroy (mask);
157 158
  if (shape)
    cairo_pattern_destroy (shape);
159 160
  if (text) 
    text->decRefCnt();  
161
}
Kristian Høgsberg's avatar
Kristian Høgsberg committed
162

163
void CairoOutputDev::setCairo(cairo_t *cairo)
164
{
165 166 167 168 169
  if (this->cairo != NULL) {
    cairo_status_t status = cairo_status (this->cairo);
    if (status) {
      warning("cairo context error: %s\n", cairo_status_to_string(status));
    }
170
    cairo_destroy (this->cairo);
171
    assert(!cairo_shape);
172
  }
173
  if (cairo != NULL) {
174
    this->cairo = cairo_reference (cairo);
175 176 177 178
	/* save the initial matrix so that we can use it for type3 fonts. */
	//XXX: is this sufficient? could we miss changes to the matrix somehow?
	cairo_get_matrix(cairo, &orig_matrix);
  } else {
179
    this->cairo = NULL;
180
    this->cairo_shape = NULL;
181
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
182 183
}

184 185 186 187 188 189 190 191 192 193 194 195
void CairoOutputDev::setTextPage(TextPage *text)
{
  if (this->text) 
    this->text->decRefCnt();
  if (text) {
    this->text = text;
    this->text->incRefCnt();
  } else {
    this->text = NULL;
  }
}

196 197
void CairoOutputDev::startDoc(XRef *xrefA, Catalog *catalogA,
			      CairoFontEngine *parentFontEngine) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
198
  xref = xrefA;
199
  catalog = catalogA;
200 201 202 203 204 205 206 207
  if (parentFontEngine) {
    fontEngine = parentFontEngine;
  } else {
    if (fontEngine) {
      delete fontEngine;
    }
    fontEngine = new CairoFontEngine(ft_lib);
    fontEngine_owner = gTrue;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
208 209 210
  }
}

211 212 213 214 215 216 217
void CairoOutputDev::startPage(int pageNum, GfxState *state) {
  /* set up some per page defaults */
  cairo_pattern_destroy(fill_pattern);
  fill_pattern = cairo_pattern_create_rgb(0., 0., 0.);

  cairo_pattern_destroy(stroke_pattern);
  stroke_pattern = cairo_pattern_create_rgb(0., 0., 0.);
218 219 220 221 222 223 224 225 226 227

  if (text)
    text->startPage(state);
}

void CairoOutputDev::endPage() {
  if (text) {
    text->endPage();
    text->coalesce(gTrue, gFalse);
  }
228 229
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
230 231 232 233 234 235
void CairoOutputDev::drawLink(Link *link, Catalog *catalog) {
}

void CairoOutputDev::saveState(GfxState *state) {
  LOG(printf ("save\n"));
  cairo_save (cairo);
236 237
  if (cairo_shape)
      cairo_save (cairo_shape);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
238 239 240 241 242
}

void CairoOutputDev::restoreState(GfxState *state) {
  LOG(printf ("restore\n"));
  cairo_restore (cairo);
243 244
  if (cairo_shape)
      cairo_restore (cairo_shape);
245 246 247 248 249 250 251

  /* These aren't restored by cairo_restore() since we keep them in
   * the output device. */
  updateFillColor(state);
  updateStrokeColor(state);
  updateFillOpacity(state);
  updateStrokeOpacity(state);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
252 253 254 255 256 257 258 259 260 261 262
}

void CairoOutputDev::updateAll(GfxState *state) {
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
  updateFlatness(state);
  updateMiterLimit(state);
  updateFillColor(state);
  updateStrokeColor(state);
263 264
  updateFillOpacity(state);
  updateStrokeOpacity(state);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
265 266 267
  needFontUpdate = gTrue;
}

268 269 270 271 272 273 274 275 276
void CairoOutputDev::setDefaultCTM(double *ctm) {
  cairo_matrix_t matrix;
  matrix.xx = ctm[0];
  matrix.yx = ctm[1];
  matrix.xy = ctm[2];
  matrix.yy = ctm[3];
  matrix.x0 = ctm[4];
  matrix.y0 = ctm[5];

277
  cairo_transform (cairo, &matrix);
278 279
  if (shape)
      cairo_transform (cairo_shape, &matrix);
280 281 282 283

  OutputDev::setDefaultCTM(ctm);
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
284 285 286
void CairoOutputDev::updateCTM(GfxState *state, double m11, double m12,
				double m21, double m22,
				double m31, double m32) {
287
  cairo_matrix_t matrix, invert_matrix;
288 289 290 291 292 293 294
  matrix.xx = m11;
  matrix.yx = m12;
  matrix.xy = m21;
  matrix.yy = m22;
  matrix.x0 = m31;
  matrix.y0 = m32;

295 296 297 298 299 300 301 302
  /* Make sure the matrix is invertible before setting it.
   * cairo will blow up if we give it a matrix that's not
   * invertible, so we need to check before passing it
   * to cairo_transform. Ignoring it is likely to give better
   * results than not rendering anything at all. See #14398
   *
   * Ideally, we could do the cairo_transform
   * and then check if anything went wrong and fix it then
303 304 305
   * instead of having to invert the matrix. */
  invert_matrix = matrix;
  if (cairo_matrix_invert(&invert_matrix)) {
306 307 308 309
    warning("matrix not invertible\n");
    return;
  }

310
  cairo_transform (cairo, &matrix);
311 312
  if (cairo_shape)
    cairo_transform (cairo_shape, &matrix);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
313 314 315 316 317 318 319 320 321 322 323 324
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
}

void CairoOutputDev::updateLineDash(GfxState *state) {
  double *dashPattern;
  int dashLength;
  double dashStart;

  state->getLineDash(&dashPattern, &dashLength, &dashStart);
325
  cairo_set_dash (cairo, dashPattern, dashLength, dashStart);
326 327
  if (cairo_shape)
    cairo_set_dash (cairo_shape, dashPattern, dashLength, dashStart);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
328 329 330
}

void CairoOutputDev::updateFlatness(GfxState *state) {
331
  // cairo_set_tolerance (cairo, state->getFlatness());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
332 333 334 335 336 337 338 339 340 341 342 343 344 345
}

void CairoOutputDev::updateLineJoin(GfxState *state) {
  switch (state->getLineJoin()) {
  case 0:
    cairo_set_line_join (cairo, CAIRO_LINE_JOIN_MITER);
    break;
  case 1:
    cairo_set_line_join (cairo, CAIRO_LINE_JOIN_ROUND);
    break;
  case 2:
    cairo_set_line_join (cairo, CAIRO_LINE_JOIN_BEVEL);
    break;
  }
346 347
  if (cairo_shape)
    cairo_set_line_join (cairo_shape, cairo_get_line_join(cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
348 349 350 351 352 353 354 355 356 357 358 359 360 361
}

void CairoOutputDev::updateLineCap(GfxState *state) {
  switch (state->getLineCap()) {
  case 0:
    cairo_set_line_cap (cairo, CAIRO_LINE_CAP_BUTT);
    break;
  case 1:
    cairo_set_line_cap (cairo, CAIRO_LINE_CAP_ROUND);
    break;
  case 2:
    cairo_set_line_cap (cairo, CAIRO_LINE_CAP_SQUARE);
    break;
  }
362 363
  if (cairo_shape)
    cairo_set_line_cap (cairo_shape, cairo_get_line_cap(cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
364 365 366 367
}

void CairoOutputDev::updateMiterLimit(GfxState *state) {
  cairo_set_miter_limit (cairo, state->getMiterLimit());
368 369
  if (cairo_shape)
    cairo_set_miter_limit (cairo_shape, state->getMiterLimit());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
370 371
}

372
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
373

Kristian Høgsberg's avatar
Kristian Høgsberg committed
374
void CairoOutputDev::updateLineWidth(GfxState *state) {
375 376
  LOG(printf ("line width: %f\n", state->getLineWidth()));
  if (state->getLineWidth() == 0.0) {
377 378 379 380 381
    /* find out how big pixels (device unit) are in the x and y directions
     * choose the smaller of the two as our line width */
    double x = 1.0, y = 1.0;
    cairo_device_to_user_distance(cairo, &x, &y);
    cairo_set_line_width (cairo, MIN(fabs(x),fabs(y)));
382
  } else {
383
    cairo_set_line_width (cairo, state->getLineWidth());
384
  }
385 386
  if (cairo_shape)
    cairo_set_line_width (cairo_shape, cairo_get_line_width (cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
387 388 389 390
}

void CairoOutputDev::updateFillColor(GfxState *state) {
  state->getFillRGB(&fill_color);
391 392 393 394 395 396 397 398 399

  cairo_pattern_destroy(fill_pattern);
  fill_pattern = cairo_pattern_create_rgba(fill_color.r / 65535.0,
					   fill_color.g / 65535.0,
					   fill_color.b / 65535.0,
					   fill_opacity);

  LOG(printf ("fill color: %d %d %d\n",
	      fill_color.r, fill_color.g, fill_color.b));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
400 401 402 403
}

void CairoOutputDev::updateStrokeColor(GfxState *state) {
  state->getStrokeRGB(&stroke_color);
404 405 406 407 408 409 410 411 412

  cairo_pattern_destroy(stroke_pattern);
  stroke_pattern = cairo_pattern_create_rgba(stroke_color.r / 65535.0,
					     stroke_color.g / 65535.0,
					     stroke_color.b / 65535.0,
					     stroke_opacity);
  
  LOG(printf ("stroke color: %d %d %d\n",
	      stroke_color.r, stroke_color.g, stroke_color.b));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
413 414
}

415 416
void CairoOutputDev::updateFillOpacity(GfxState *state) {
  fill_opacity = state->getFillOpacity();
417 418 419 420 421 422 423

  cairo_pattern_destroy(fill_pattern);
  fill_pattern = cairo_pattern_create_rgba(fill_color.r / 65535.0,
					   fill_color.g / 65535.0,
					   fill_color.b / 65535.0,
					   fill_opacity);

424 425 426 427 428
  LOG(printf ("fill opacity: %f\n", fill_opacity));
}

void CairoOutputDev::updateStrokeOpacity(GfxState *state) {
  stroke_opacity = state->getStrokeOpacity();
429 430 431 432 433 434 435

  cairo_pattern_destroy(stroke_pattern);
  stroke_pattern = cairo_pattern_create_rgba(stroke_color.r / 65535.0,
					     stroke_color.g / 65535.0,
					     stroke_color.b / 65535.0,
					     stroke_opacity);
  
436 437 438
  LOG(printf ("stroke opacity: %f\n", stroke_opacity));
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
439
void CairoOutputDev::updateFont(GfxState *state) {
440
  cairo_font_face_t *font_face;
441
  cairo_matrix_t matrix, invert_matrix;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
442 443

  LOG(printf ("updateFont() font=%s\n", state->getFont()->getName()->getCString()));
444

Kristian Høgsberg's avatar
Kristian Høgsberg committed
445 446
  needFontUpdate = gFalse;

447 448 449 450
  //FIXME: use cairo font engine?
  if (text)
    text->updateFont(state);
  
451
  currentFont = fontEngine->getFont (state->getFont(), xref, catalog, printing);
452

453 454
  if (!currentFont)
    return;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
455

456
  LOG(printf ("font matrix: %f %f %f %f\n", m11, m12, m21, m22));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
457
  
458 459
  font_face = currentFont->getFontFace();
  cairo_set_font_face (cairo, font_face);
460 461 462
 
  double fontSize = state->getFontSize();
  double *m = state->getTextMat();
463 464 465 466 467 468
  /* NOTE: adjusting by a constant is hack. The correct solution
   * is probably to use user-fonts and compute the scale on a per
   * glyph basis instead of for the entire font */
  double w = currentFont->getSubstitutionCorrection(state->getFont());
  matrix.xx = m[0] * fontSize * state->getHorizScaling() * w;
  matrix.yx = m[1] * fontSize * state->getHorizScaling() * w;
469 470
  matrix.xy = -m[2] * fontSize;
  matrix.yy = -m[3] * fontSize;
471 472
  matrix.x0 = 0;
  matrix.y0 = 0;
473 474 475 476 477 478 479 480 481 482 483 484 485

 /* Make sure the font matrix is invertible before setting it.  cairo
  * will blow up if we give it a matrix that's not invertible, so we
  * need to check before passing it to cairo_set_font_matrix. Ignoring it
  * is likely to give better results than not rendering anything at
  * all. See #18254.
  */
  invert_matrix = matrix;
  if (cairo_matrix_invert(&invert_matrix)) {
    warning("font matrix not invertible\n");
    return;
  }

486
  cairo_set_font_matrix (cairo, &matrix);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
487 488
}

489
void CairoOutputDev::doPath(cairo_t *cairo, GfxState *state, GfxPath *path) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
490 491 492 493 494
  GfxSubpath *subpath;
  int i, j;
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
495 496
      cairo_move_to (cairo, subpath->getX(0), subpath->getY(0));
         j = 1;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
497 498
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
499 500 501 502 503
	  cairo_curve_to( cairo,
			  subpath->getX(j), subpath->getY(j),
			  subpath->getX(j+1), subpath->getY(j+1),
			  subpath->getX(j+2), subpath->getY(j+2));

Kristian Høgsberg's avatar
Kristian Høgsberg committed
504 505
	  j += 3;
	} else {
506
	  cairo_line_to (cairo, subpath->getX(j), subpath->getY(j));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
507 508 509 510 511 512 513 514 515 516 517 518
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	LOG (printf ("close\n"));
	cairo_close_path (cairo);
      }
    }
  }
}

void CairoOutputDev::stroke(GfxState *state) {
519
  doPath (cairo, state, state->getPath());
520
  cairo_set_source (cairo, stroke_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
521 522
  LOG(printf ("stroke\n"));
  cairo_stroke (cairo);
523 524 525 526
  if (cairo_shape) {
    doPath (cairo_shape, state, state->getPath());
    cairo_stroke (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
527 528 529
}

void CairoOutputDev::fill(GfxState *state) {
530
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
531
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_WINDING);
532
  cairo_set_source (cairo, fill_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
533
  LOG(printf ("fill\n"));
534
  //XXX: how do we get the path
Kristian Høgsberg's avatar
Kristian Høgsberg committed
535
  cairo_fill (cairo);
536 537 538 539 540
  if (cairo_shape) {
    cairo_set_fill_rule (cairo_shape, CAIRO_FILL_RULE_WINDING);
    doPath (cairo_shape, state, state->getPath());
    cairo_fill (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
541 542 543
}

void CairoOutputDev::eoFill(GfxState *state) {
544
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
545
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_EVEN_ODD);
546
  cairo_set_source (cairo, fill_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
547 548
  LOG(printf ("fill-eo\n"));
  cairo_fill (cairo);
549 550 551 552 553 554 555

  if (cairo_shape) {
    cairo_set_fill_rule (cairo_shape, CAIRO_FILL_RULE_EVEN_ODD);
    doPath (cairo_shape, state, state->getPath());
    cairo_fill (cairo_shape);
  }

Kristian Høgsberg's avatar
Kristian Høgsberg committed
556 557
}

558
void CairoOutputDev::clip(GfxState *state) {
559
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
560 561 562
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_WINDING);
  cairo_clip (cairo);
  LOG (printf ("clip\n"));
563 564 565 566 567
  if (cairo_shape) {
    doPath (cairo_shape, state, state->getPath());
    cairo_set_fill_rule (cairo_shape, CAIRO_FILL_RULE_WINDING);
    cairo_clip (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
568 569 570
}

void CairoOutputDev::eoClip(GfxState *state) {
571
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
572 573 574
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_EVEN_ODD);
  cairo_clip (cairo);
  LOG (printf ("clip-eo\n"));
575 576 577 578 579 580
  if (cairo_shape) {
    doPath (cairo_shape, state, state->getPath());
    cairo_set_fill_rule (cairo_shape, CAIRO_FILL_RULE_EVEN_ODD);
    cairo_clip (cairo_shape);
  }

Kristian Høgsberg's avatar
Kristian Høgsberg committed
581 582
}

583
void CairoOutputDev::beginString(GfxState *state, GooString *s)
584 585
{
  int len = s->getLength();
586

587 588 589
  if (needFontUpdate)
    updateFont(state);

590 591 592
  if (!currentFont)
    return;

593 594 595 596 597 598 599
  glyphs = (cairo_glyph_t *) gmalloc (len * sizeof (cairo_glyph_t));
  glyphCount = 0;
}

void CairoOutputDev::drawChar(GfxState *state, double x, double y,
			      double dx, double dy,
			      double originX, double originY,
600
			      CharCode code, int nBytes, Unicode *u, int uLen)
601
{
602 603 604 605 606 607 608 609
  if (currentFont) {
    glyphs[glyphCount].index = currentFont->getGlyph (code, u, uLen);
    glyphs[glyphCount].x = x - originX;
    glyphs[glyphCount].y = y - originY;
    glyphCount++;
  }

  if (!text)
610 611
    return;
  
612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
  if (actualTextBMCLevel == 0) {
    text->addChar(state, x, y, dx, dy, code, nBytes, u, uLen);
  } else {
    // Inside ActualText span.
    if (newActualTextSpan) {
      actualText_x = x;
      actualText_y = y;
      actualText_dx = dx;
      actualText_dy = dy;
      newActualTextSpan = gFalse;
    } else {
      if (x < actualText_x)
	actualText_x = x;
      if (y < actualText_y)
	actualText_y = y;
      if (x + dx > actualText_x + actualText_dx)
	actualText_dx = x + dx - actualText_x;
      if (y + dy > actualText_y + actualText_dy)
	actualText_dy = y + dy - actualText_y;
    }
  }
633 634 635 636 637 638 639
}

void CairoOutputDev::endString(GfxState *state)
{
  int render;

  if (!currentFont)
Kristian Høgsberg's avatar
Kristian Høgsberg committed
640
    return;
641 642 643 644 645 646 647

  // endString can be called without a corresponding beginString. If this
  // happens glyphs will be null so don't draw anything, just return.
  // XXX: OutputDevs should probably not have to deal with this...
  if (!glyphs)
    return;

648 649
  // ignore empty strings and invisible text -- this is used by
  // Acrobat Capture
Kristian Høgsberg's avatar
Kristian Høgsberg committed
650
  render = state->getRender();
651
  if (render == 3 || glyphCount == 0) {
652 653
    gfree(glyphs);
    glyphs = NULL;
654
    return;
655
  }
656
  
Kristian Høgsberg's avatar
Kristian Høgsberg committed
657
  if (!(render & 1)) {
658
    LOG (printf ("fill string\n"));
659
    cairo_set_source (cairo, fill_pattern);
660
    cairo_show_glyphs (cairo, glyphs, glyphCount);
661 662
    if (cairo_shape)
      cairo_show_glyphs (cairo_shape, glyphs, glyphCount);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
663
  }
664
  
Kristian Høgsberg's avatar
Kristian Høgsberg committed
665 666
  // stroke
  if ((render & 3) == 1 || (render & 3) == 2) {
667
    LOG (printf ("stroke string\n"));
668
    cairo_set_source (cairo, stroke_pattern);
669
    cairo_glyph_path (cairo, glyphs, glyphCount);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
670
    cairo_stroke (cairo);
671 672 673 674
    if (cairo_shape) {
      cairo_glyph_path (cairo_shape, glyphs, glyphCount);
      cairo_stroke (cairo_shape);
    }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
675 676 677 678
  }

  // clip
  if (render & 4) {
679
    LOG (printf ("clip string\n"));
680 681 682 683 684
    // append the glyph path to textClipPath.

    // set textClipPath as the currentPath
    if (textClipPath) {
      cairo_append_path (cairo, textClipPath);
685 686 687
      if (cairo_shape) {
	cairo_append_path (cairo_shape, textClipPath);
      }
688 689 690 691
      cairo_path_destroy (textClipPath);
    }
    
    // append the glyph path
692
    cairo_glyph_path (cairo, glyphs, glyphCount);
693 694 695 696 697
   
    // move the path back into textClipPath 
    // and clear the current path
    textClipPath = cairo_copy_path (cairo);
    cairo_new_path (cairo);
698 699 700
    if (cairo_shape) {
      cairo_new_path (cairo_shape);
    }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
701
  }
702

703
  gfree (glyphs);
704
  glyphs = NULL;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
705 706
}

707

Kristian Høgsberg's avatar
Kristian Høgsberg committed
708 709 710
GBool CairoOutputDev::beginType3Char(GfxState *state, double x, double y,
				      double dx, double dy,
				      CharCode code, Unicode *u, int uLen) {
711 712 713 714 715 716 717 718 719 720 721 722

  cairo_save (cairo);
  double *ctm;
  cairo_matrix_t matrix;

  ctm = state->getCTM();
  matrix.xx = ctm[0];
  matrix.yx = ctm[1];
  matrix.xy = ctm[2];
  matrix.yy = ctm[3];
  matrix.x0 = ctm[4];
  matrix.y0 = ctm[5];
723 724 725 726
  /* Restore the original matrix and then transform to matrix needed for the
   * type3 font. This is ugly but seems to work. Perhaps there is a better way to do it?*/
  cairo_set_matrix(cairo, &orig_matrix);
  cairo_transform(cairo, &matrix);
727 728 729 730 731
  if (cairo_shape) {
    cairo_save (cairo_shape);
    cairo_set_matrix(cairo_shape, &orig_matrix);
    cairo_transform(cairo_shape, &matrix);
  }
732 733
  cairo_pattern_destroy(stroke_pattern);
  cairo_pattern_reference(fill_pattern);
734
  stroke_pattern = fill_pattern;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
735 736 737 738
  return gFalse;
}

void CairoOutputDev::endType3Char(GfxState *state) {
739
  cairo_restore (cairo);
740 741 742
  if (cairo_shape) {
    cairo_restore (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
743 744 745
}

void CairoOutputDev::type3D0(GfxState *state, double wx, double wy) {
746 747
  t3_glyph_wx = wx;
  t3_glyph_wy = wy;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
748 749 750
}

void CairoOutputDev::type3D1(GfxState *state, double wx, double wy,
751
			     double llx, double lly, double urx, double ury) {
752 753 754 755 756 757 758
  t3_glyph_wx = wx;
  t3_glyph_wy = wy;
  t3_glyph_bbox[0] = llx;
  t3_glyph_bbox[1] = lly;
  t3_glyph_bbox[2] = urx;
  t3_glyph_bbox[3] = ury;
  t3_glyph_has_bbox = gTrue;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
759 760 761
}

void CairoOutputDev::endTextObject(GfxState *state) {
762 763 764 765
  if (textClipPath) {
    // clip the accumulated text path
    cairo_append_path (cairo, textClipPath);
    cairo_clip (cairo);
766 767 768 769
    if (cairo_shape) {
      cairo_append_path (cairo_shape, textClipPath);
      cairo_clip (cairo_shape);
    }
770 771 772
    cairo_path_destroy (textClipPath);
    textClipPath = NULL;
  }
773
}
774

775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
void CairoOutputDev::beginMarkedContent(char *name, Dict *properties)
{
  Object obj;

  if (!text)
    return;
  
  if (actualTextBMCLevel > 0) {
    // Already inside a ActualText span.
    actualTextBMCLevel++;
    return;
  }

  if (properties->lookup("ActualText", &obj)) {
    if (obj.isString()) {
      actualText = obj.getString();
      actualTextBMCLevel = 1;
      newActualTextSpan = gTrue;
    }
  }
}

void CairoOutputDev::endMarkedContent(GfxState *state)
{
  char *uniString = NULL;
  Unicode *uni;
  int length, i;

  if (!text)
    return;
  
  if (actualTextBMCLevel > 0) {
    actualTextBMCLevel--;
    if (actualTextBMCLevel == 0) {
      // ActualText span closed. Output the span text and the
      // extents of all the glyphs inside the span

      if (newActualTextSpan) {
	// No content inside span.
	actualText_x = state->getCurX();
	actualText_y = state->getCurY();
	actualText_dx = 0;
	actualText_dy = 0;
      }

      if (!actualText->hasUnicodeMarker()) {
	if (actualText->getLength() > 0) {
	  //non-unicode string -- assume pdfDocEncoding and
	  //try to convert to UTF16BE
	  uniString = pdfDocEncodingToUTF16(actualText, &length);
	} else {
	  length = 0;
	}
      } else {
	uniString = actualText->getCString();
	length = actualText->getLength();
      }

      if (length < 3)
	length = 0;
      else
	length = length/2 - 1;
      uni = new Unicode[length];
      for (i = 0 ; i < length; i++)
	uni[i] = (uniString[2 + i*2]<<8) + uniString[2 + i*2+1];

      text->addChar(state,
		    actualText_x, actualText_y,
		    actualText_dx, actualText_dy,
		    0, 1, uni, length);

      delete [] uni;
      if (!actualText->hasUnicodeMarker())
	delete [] uniString;
      delete actualText;
    }
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
852 853
}

854 855 856 857 858 859 860 861 862 863 864 865
static inline int splashRound(SplashCoord x) {
  return (int)floor(x + 0.5);
}

static inline int splashCeil(SplashCoord x) {
  return (int)ceil(x);
}

static inline int splashFloor(SplashCoord x) {
  return (int)floor(x);
}

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
static
cairo_surface_t *cairo_surface_create_similar_clip (cairo_t *cairo, cairo_content_t content)
{
  double x1, y1, x2, y2;
  int width, height;
  cairo_clip_extents (cairo, &x1, &y1, &x2, &y2);
  cairo_matrix_t matrix;
  cairo_get_matrix (cairo, &matrix);
  //cairo_matrix_transform_point(&matrix, &x1, &y1);
  //cairo_matrix_transform_point(&matrix, &x2, &y2);*/
  cairo_user_to_device(cairo, &x1, &y1);
  cairo_user_to_device(cairo, &x2, &y2);
  width = splashCeil(x2) - splashFloor(x1);
  //XXX: negative matrix
  ////height = splashCeil(y2) - splashFloor(y1);
  height = splashFloor(y1) - splashCeil(y2);
  cairo_surface_t *target = cairo_get_target (cairo);
  cairo_surface_t *result;

  result = cairo_surface_create_similar (target, content, width, height);
  double x_offset, y_offset;
    cairo_surface_get_device_offset(target, &x_offset, &y_offset);
    cairo_surface_set_device_offset(result, x_offset, y_offset);

 
  return result;
}



896 897
void CairoOutputDev::beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
                                      GfxColorSpace * blendingColorSpace,
898
                                      GBool /*isolated*/, GBool knockout,
899 900 901 902
				      GBool forSoftMask) {
  /* push color space */
  ColorSpaceStack* css = new ColorSpaceStack;
  css->cs = blendingColorSpace;
903
  css->knockout = knockout;
904 905
  css->next = groupColorSpaceStack;
  groupColorSpaceStack = css;
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927
  if (knockout) {
    knockoutCount++;
    if (!cairo_shape) {
      /* create a surface for tracking the shape */
      cairo_surface_t *cairo_shape_surface = cairo_surface_create_similar_clip (cairo, CAIRO_CONTENT_ALPHA);
      cairo_shape = cairo_create (cairo_shape_surface);
      cairo_surface_destroy (cairo_shape_surface);

      /* the color doesn't matter as long as it is opaque */
      cairo_set_source_rgb (cairo_shape, 0, 0, 0);
      cairo_matrix_t matrix;
      cairo_get_matrix (cairo, &matrix);
      //printMatrix(&matrix);
      cairo_set_matrix (cairo_shape, &matrix);
    } else {
      cairo_reference (cairo_shape);
    }
  }
  if (groupColorSpaceStack->next && groupColorSpaceStack->next->knockout) {
    /* we need to track the shape */
    cairo_push_group (cairo_shape);
  }
928 929 930 931
  if (0 && forSoftMask)
    cairo_push_group_with_content (cairo, CAIRO_CONTENT_ALPHA);
  else
    cairo_push_group (cairo);
932 933 934 935 936 937 938 939

  /* push_group has an implicit cairo_save() */
  if (knockout) {
    /*XXX: let's hope this matches the semantics needed */
    cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
  } else {
    cairo_set_operator(cairo, CAIRO_OPERATOR_OVER);
  }
940
}
941

942
void CairoOutputDev::endTransparencyGroup(GfxState * /*state*/) {
943

944 945 946
  if (group)
    cairo_pattern_destroy(group);
  group = cairo_pop_group (cairo);
947 948 949 950 951 952

  if (groupColorSpaceStack->next && groupColorSpaceStack->next->knockout) {
    if (shape)
      cairo_pattern_destroy(shape);
    shape = cairo_pop_group (cairo_shape);
  }
953
}
954

955 956 957 958
void CairoOutputDev::paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {
  cairo_set_source (cairo, group);

  if (!mask) {
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
    //XXX: deal with mask && shape case
    if (shape) {
      cairo_save (cairo);

      /* OPERATOR_SOURCE w/ a mask is defined as (src IN mask) ADD (dest OUT mask)
       * however our source has already been clipped to mask so we only need to
       * do ADD and OUT */

      /* clear the shape mask */
      cairo_set_source (cairo, shape);
      cairo_set_operator (cairo, CAIRO_OPERATOR_DEST_OUT);
      cairo_paint (cairo);

      cairo_set_operator (cairo, CAIRO_OPERATOR_ADD);
      cairo_set_source (cairo, group);
      cairo_paint (cairo);

      cairo_restore (cairo);

      cairo_pattern_destroy (shape);
      shape = NULL;
    } else {
      cairo_paint_with_alpha (cairo, fill_opacity);
    }
    cairo_status_t status = cairo_status(cairo);
    if (status)
      printf("BAD status: %s\n", cairo_status_to_string(status));
986 987 988 989 990 991 992
  } else {
    cairo_mask(cairo, mask);

    cairo_pattern_destroy(mask);
    mask = NULL;
  }

993
  popTransparencyGroup();
994 995 996 997 998 999 1000 1001 1002
}

typedef unsigned int uint32_t;

static uint32_t luminocity(uint32_t x)
{
  int r = (x >> 16) & 0xff;
  int g = (x >>  8) & 0xff;
  int b = (x >>  0) & 0xff;
1003 1004
  // an arbitrary integer approximation of .3*r + .59*g + .11*b
  int y = (r*19661+g*38666+b*7209 + 32829)>>16;
1005 1006 1007 1008
  return y << 24;
}


1009
/* XXX: do we need to deal with shape here? */
1010 1011
void CairoOutputDev::setSoftMask(GfxState * state, double * bbox, GBool alpha,
                                 Function * transferFunc, GfxColor * backdropColor) {
Chris Wilson's avatar
Chris Wilson committed
1012 1013
  cairo_pattern_destroy(mask);

1014 1015 1016 1017 1018 1019 1020
  if (alpha == false) {
    /* We need to mask according to the luminocity of the group.
     * So we paint the group to an image surface convert it to a luminocity map
     * and then use that as the mask. */

    double x1, y1, x2, y2;
    cairo_clip_extents(cairo, &x1, &y1, &x2, &y2);
1021 1022
    int width = (int)(ceil(x2) - floor(x1));
    int height = (int)(ceil(y2) - floor(y1));
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050

    cairo_surface_t *source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
    cairo_t *maskCtx = cairo_create(source);

    //XXX: hopefully this uses the correct color space */
    GfxRGB backdropColorRGB;
    groupColorSpaceStack->cs->getRGB(backdropColor, &backdropColorRGB);
    /* paint the backdrop */
    cairo_set_source_rgb(maskCtx, backdropColorRGB.r / 65535.0,
			 backdropColorRGB.g / 65535.0,
			 backdropColorRGB.b / 65535.0);


    cairo_matrix_t mat;
    cairo_get_matrix(cairo, &mat);
    cairo_set_matrix(maskCtx, &mat);

    /* make the device offset of the new mask match that of the group */
    double x_offset, y_offset;
    cairo_surface_t *pats;
    cairo_pattern_get_surface(group, &pats);
    cairo_surface_get_device_offset(pats, &x_offset, &y_offset);
    cairo_surface_set_device_offset(source, x_offset, y_offset);

    /* paint the group */
    cairo_set_source(maskCtx, group);
    cairo_paint(maskCtx);

Chris Wilson's avatar
Chris Wilson committed
1051 1052 1053
    /* XXX status = cairo_status(maskCtx); */
    cairo_destroy(maskCtx);

1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
    /* convert to a luminocity map */
    uint32_t *source_data = (uint32_t*)cairo_image_surface_get_data(source);
    /* get stride in units of 32 bits */
    int stride = cairo_image_surface_get_stride(source)/4;
    for (int y=0; y<height; y++) {
      for (int x=0; x<width; x++) {
	source_data[y*stride + x] = luminocity(source_data[y*stride + x]);

#if 0
	here is how splash deals with the transferfunction we should deal with this
	  at some point
	if (transferFunc) {
	  transferFunc->transform(&lum, &lum2);
	} else {
	  lum2 = lum;
	}
	p[x] = (int)(lum2 * 255.0 + 0.5);
#endif

      }
    }

    /* setup the new mask pattern */
    mask = cairo_pattern_create_for_surface(source);
    cairo_matrix_t patMatrix;
    cairo_pattern_get_matrix(group, &patMatrix);
    cairo_pattern_set_matrix(mask, &patMatrix);

    cairo_surface_destroy(source);
  } else {
Chris Wilson's avatar
Chris Wilson committed
1084
    mask = cairo_pattern_reference(group);
1085
  }
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103

  popTransparencyGroup();
}

void CairoOutputDev::popTransparencyGroup() {
  /* pop color space */
  ColorSpaceStack *css = groupColorSpaceStack;
  if (css->knockout) {
    knockoutCount--;
    if (!knockoutCount) {
      /* we don't need to track the shape anymore because
       * we are not above any knockout groups */
      cairo_destroy(cairo_shape);
      cairo_shape = NULL;
    }
  }
  groupColorSpaceStack = css->next;
  delete css;
1104 1105
}

1106

1107 1108 1109
void CairoOutputDev::clearSoftMask(GfxState * /*state*/) {
  //XXX: should we be doing anything here?
}
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1110 1111 1112 1113

void CairoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
				    int width, int height, GBool invert,
				    GBool inlineImg) {
1114

1115 1116 1117 1118
  /* FIXME: Doesn't the image mask support any colorspace? */
  cairo_set_source (cairo, fill_pattern);

  /* work around a cairo bug when scaling 1x1 surfaces */
1119 1120
  if (width == 1 && height == 1) {
    cairo_save (cairo);
1121
    cairo_rectangle (cairo, 0., 0., width, height);
1122 1123
    cairo_fill (cairo);
    cairo_restore (cairo);
1124 1125 1126 1127 1128 1129
    if (cairo_shape) {
      cairo_save (cairo_shape);
      cairo_rectangle (cairo_shape, 0., 0., width, height);
      cairo_fill (cairo_shape);
      cairo_restore (cairo_shape);
    }
1130 1131 1132
    return;
  }

1133 1134
  /* shape is 1.0 for painted areas, 0.0 for unpainted ones */

1135 1136
  cairo_matrix_t matrix;
  cairo_get_matrix (cairo, &matrix);
1137 1138
  //XXX: it is possible that we should only do sub pixel positioning if 
  // we are rendering fonts */
1139
  if (!printing && prescaleImages && matrix.xy == 0.0 && matrix.yx == 0.0) {
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
    drawImageMaskPrescaled(state, ref, str, width, height, invert, inlineImg);
  } else {
    drawImageMaskRegular(state, ref, str, width, height, invert, inlineImg);
  }
}

void CairoOutputDev::drawImageMaskRegular(GfxState *state, Object *ref, Stream *str,
				    int width, int height, GBool invert,
				    GBool inlineImg) {
  unsigned char *buffer;
  unsigned char *dest;
  cairo_surface_t *image;
  cairo_pattern_t *pattern;
  int x, y;
  ImageStream *imgStr;
  Guchar *pix;
  cairo_matrix_t matrix;
  int invert_bit;
  int row_stride;

1160 1161
  row_stride = (width + 3) & ~3;
  buffer = (unsigned char *) malloc (height * row_stride);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1162 1163 1164 1165 1166 1167
  if (buffer == NULL) {
    error(-1, "Unable to allocate memory for image.");
    return;
  }

  /* TODO: Do we want to cache these? */
1168
  imgStr = new ImageStream(str, width, 1, 1);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1169 1170
  imgStr->reset();

1171 1172
  invert_bit = invert ? 1 : 0;

Kristian Høgsberg's avatar
Kristian Høgsberg committed
1173
  for (y = 0; y < height; y++) {
1174
    pix = imgStr->getLine();
1175
    dest = buffer + y * row_stride;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1176
    for (x = 0; x < width; x++) {
1177 1178

      if (pix[x] ^ invert_bit)
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1179
	*dest++ = 0;
1180 1181
      else
	*dest++ = 255;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1182 1183 1184
    }
  }

1185
  image = cairo_image_surface_create_for_data (buffer, CAIRO_FORMAT_A8,
1186
					       width, height, row_stride);
1187 1188
  if (image == NULL) {
    delete imgStr;
1189
    return;
1190
  }
1191
  pattern = cairo_pattern_create_for_surface (image);
1192 1193
  if (pattern == NULL) {
    delete imgStr;
1194
    return;
1195
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1196

1197 1198 1199
  cairo_matrix_init_translate (&matrix, 0, height);
  cairo_matrix_scale (&matrix, width, -height);

1200
  cairo_pattern_set_matrix (pattern, &matrix);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1201

1202 1203 1204
  /* we should actually be using CAIRO_FILTER_NEAREST here. However,
   * cairo doesn't yet do minifaction filtering causing scaled down
   * images with CAIRO_FILTER_NEAREST to look really bad */
1205
  cairo_pattern_set_filter (pattern, CAIRO_FILTER_BEST);
1206

1207
  cairo_mask (cairo, pattern);
1208

1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
  if (cairo_shape) {
#if 0
    cairo_rectangle (cairo_shape, 0., 0., width, height);
    cairo_fill (cairo_shape);
#else
    cairo_save (cairo_shape);
    /* this should draw a rectangle the size of the image
     * we use this instead of rect,fill because of the lack
     * of EXTEND_PAD */
    /* NOTE: this will multiply the edges of the image twice */
    cairo_set_source (cairo_shape, pattern);
    cairo_mask (cairo_shape, pattern);
    cairo_restore (cairo_shape);
#endif
  }


1226
  cairo_pattern_destroy (pattern);
1227 1228
  cairo_surface_destroy (image);
  free (buffer);
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
  delete imgStr;
}


void CairoOutputDev::drawImageMaskPrescaled(GfxState *state, Object *ref, Stream *str,
				    int width, int height, GBool invert,
				    GBool inlineImg) {
  unsigned char *buffer;
  cairo_surface_t *image;
  cairo_pattern_t *pattern;
  ImageStream *imgStr;
  Guchar *pix;
  cairo_matrix_t matrix;
  int invert_bit;
  int row_stride;

  /* cairo does a very poor job of scaling down images so we scale them ourselves */

  /* this scaling code is adopted from the splash image scaling code */
  cairo_get_matrix(cairo, &matrix);
#if 0
  printf("[%f %f], [%f %f], %f %f\n", matrix.xx, matrix.xy, matrix.yx, matrix.yy, matrix.x0, matrix.y0);
#endif
1252
  /* this whole computation should be factored out */
1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
  double xScale = matrix.xx;
  double yScale = matrix.yy;
  int tx, tx2, ty, ty2; /* the integer co-oridinates of the resulting image */
  int scaledHeight;
  int scaledWidth;
  if (xScale >= 0) {
    tx = splashRound(matrix.x0 - 0.01);
    tx2 = splashRound(matrix.x0 + xScale + 0.01) - 1;
  } else {
    tx = splashRound(matrix.x0 + 0.01) - 1;
    tx2 = splashRound(matrix.x0 + xScale - 0.01);
  }
  scaledWidth = abs(tx2 - tx) + 1;
  //scaledWidth = splashRound(fabs(xScale));
  if (scaledWidth == 0) {
    // technically, this should draw nothing, but it generally seems
    // better to draw a one-pixel-wide stripe rather than throwing it
    // away
    scaledWidth = 1;
  }
  if (yScale >= 0) {
    ty = splashFloor(matrix.y0 + 0.01);
    ty2 = splashCeil(matrix.y0 + yScale - 0.01);
  } else {
    ty = splashCeil(matrix.y0 - 0.01);
    ty2 = splashFloor(matrix.y0 + yScale + 0.01);
  }
  scaledHeight = abs(ty2 - ty);
1281 1282 1283
  if (scaledHeight == 0) {
    scaledHeight = 1;
  }
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
#if 0
  printf("xscale: %g, yscale: %g\n", xScale, yScale);
  printf("width: %d, height: %d\n", width, height);
  printf("scaledWidth: %d, scaledHeight: %d\n", scaledWidth, scaledHeight);
#endif

  /* compute the required padding */
  /* Padding is used to preserve the aspect ratio.
     We compute total_pad to make (height+total_pad)/scaledHeight as close to height/yScale as possible */
  int head_pad = 0;
  int tail_pad = 0;
  int total_pad = splashRound(height*(scaledHeight/fabs(yScale)) - height);

  /* compute the two pieces of padding */
  if (total_pad > 0) {
1299 1300 1301
    //XXX: i'm not positive fabs() is correct
    float tail_error = fabs(matrix.y0 - ty);
    float head_error = fabs(ty2 - (matrix.y0 + yScale));
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
    float tail_fraction = tail_error/(tail_error + head_error);
    tail_pad = splashRound(total_pad*tail_fraction);
    head_pad = total_pad - tail_pad;
  } else {
    tail_pad = 0;
    head_pad = 0;
  }
  int origHeight = height;
  height += tail_pad;
  height += head_pad;
#if 0
  printf("head_pad: %d tail_pad: %d\n", head_pad, tail_pad);
  printf("origHeight: %d height: %d\n", origHeight, height);
  printf("ty: %d, ty2: %d\n", ty, ty2);
#endif

  /* TODO: Do we want to cache these? */
  imgStr = new ImageStream(str, width, 1, 1);
  imgStr->reset();

  invert_bit = invert ? 1 : 0;

  row_stride = (scaledWidth + 3) & ~3;
  buffer = (unsigned char *) malloc (scaledHeight * row_stride);
  if (buffer == NULL) {
    error(-1, "Unable to allocate memory for image.");
    return;
  }

  int yp = height / scaledHeight;
  int yq = height % scaledHeight;
  int xp = width / scaledWidth;
  int xq = width % scaledWidth;
  int yt = 0;
  int origHeight_c = origHeight;
  /* use MIN() because yp might be > origHeight because of padding */
  unsigned char *pixBuf = (unsigned char *)malloc(MIN(yp+1, origHeight)*width);
  int lastYStep = 1;
  int total = 0;
  for (int y = 0; y < scaledHeight; y++) {
    // y scale Bresenham
    int yStep = yp;
    yt += yq;

    if (yt >= scaledHeight) {
      yt -= scaledHeight;
      ++yStep;
    }

    // read row (s) from image ignoring the padding as appropriate
    {
      int n = (yp > 0) ? yStep : lastYStep;
      total += n;
      if (n > 0) {
	unsigned char *p = pixBuf;
	int head_pad_count = head_pad;
	int origHeight_count = origHeight;
	int tail_pad_count = tail_pad;
	for (int i=0; i<n; i++) {
	  // get row
	  if (head_pad_count) {
	    head_pad_count--;
	  } else if (origHeight_count) {
	    pix = imgStr->getLine();
	    for (int j=0; j<width; j++) {
	      if (pix[j] ^ invert_bit)
		p[j] = 0;
	      else
		p[j] = 255;
	    }
	    origHeight_count--;
	    p += width;
	  } else if (tail_pad_count) {
	    tail_pad_count--;
	  } else {
	    printf("%d %d\n", n, total);
	    assert(0 && "over run\n");
	  }
	}
      }
    }

    lastYStep = yStep;
    int k1 = y;

    int xt = 0;
    int xSrc = 0;
    int x1 = k1;
    int n = yStep > 0 ? yStep : 1;
    int origN = n;

    /* compute the size of padding and pixels that will be used for this row */
    int head_pad_size = MIN(n, head_pad);
    n -= head_pad_size;
    head_pad -= MIN(head_pad_size, yStep);

    int pix_size = MIN(n, origHeight);
    n -= pix_size;
    origHeight -= MIN(pix_size, yStep);

    int tail_pad_size = MIN(n, tail_pad);
    n -= tail_pad_size;
    tail_pad -= MIN(tail_pad_size, yStep);
    if (n != 0) {
      printf("n = %d (%d %d %d)\n", n, head_pad_size, pix_size, tail_pad_size);
      assert(n == 0);
    }

    for (int x = 0; x < scaledWidth; ++x) {
      int xStep = xp;
      xt += xq;
      if (xt >= scaledWidth) {
	xt -= scaledWidth;
	++xStep;
      }
      int m = xStep > 0 ? xStep : 1;
      float pixAcc0 = 0;
      /* could m * head_pad_size * tail_pad_size  overflow? */
      if (invert_bit) {
	pixAcc0 += m * head_pad_size * tail_pad_size * 255;
      } else {
	pixAcc0 += m * head_pad_size * tail_pad_size * 0;
      }
      /* Accumulate all of the source pixels for the destination pixel */
      for (int i = 0; i < pix_size; ++i) {
	for (int j = 0; j< m; ++j) {
	  if (xSrc + i*width + j > MIN(yp + 1, origHeight_c)*width) {
	    printf("%d > %d (%d %d %d %d) (%d %d %d)\n", xSrc + i*width + j, MIN(yp + 1, origHeight_c)*width, xSrc, i , width, j, yp, origHeight_c, width);
	    printf("%d %d %d\n", head_pad_size, pix_size, tail_pad_size);
	    assert(0 && "bad access\n");
	  }
	  pixAcc0 += pixBuf[xSrc + i*width + j];
	}
      }
      buffer[y * row_stride + x] = splashFloor(pixAcc0 / (origN*m));
      xSrc += xStep;
      x1 += 1;
    }

  }
  free(pixBuf);

  //XXX: we should handle error's better than this
  image = cairo_image_surface_create_for_data (buffer, CAIRO_FORMAT_A8,
      scaledWidth, scaledHeight, row_stride);
  if (image == NULL) {
    delete imgStr;
    return;
  }
  pattern = cairo_pattern_create_for_surface (image);
  if (pattern == NULL) {
    delete imgStr;
    return;
  }

  /* we should actually be using CAIRO_FILTER_NEAREST here. However,
   * cairo doesn't yet do minifaction filtering causing scaled down
   * images with CAIRO_FILTER_NEAREST to look really bad */
  cairo_pattern_set_filter (pattern, CAIRO_FILTER_BEST);

  cairo_save (cairo);

  /* modify our current transformation so that the prescaled image
   * goes where it is supposed to */
  cairo_get_matrix(cairo, &matrix);
  cairo_scale(cairo, 1.0/matrix.xx, 1.0/matrix.yy);
  // get integer co-ords
  cairo_translate (cairo, tx - matrix.x0, ty2 - matrix.y0);
  if (yScale > 0)
    cairo_scale(cairo, 1, -1);

  cairo_mask (cairo, pattern);

  //cairo_get_matrix(cairo, &matrix);
  //printf("mask at: [%f %f], [%f %f], %f %f\n\n", matrix.xx, matrix.xy, matrix.yx, matrix.yy, matrix.x0, matrix.y0);
  cairo_restore(cairo);

1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
  if (cairo_shape) {
    cairo_save (cairo_shape);

    /* modify our current transformation so that the prescaled image
     * goes where it is supposed to */
    cairo_get_matrix(cairo_shape, &matrix);
    cairo_scale(cairo_shape, 1.0/matrix.xx, 1.0/matrix.yy);
    // get integer co-ords
    cairo_translate (cairo_shape, tx - matrix.x0, ty2 - matrix.y0);
    if (yScale > 0)
      cairo_scale(cairo_shape, 1, -1);

    cairo_mask (cairo_shape, pattern);

    cairo_restore(cairo_shape);
  }


1497 1498 1499
  cairo_pattern_destroy (pattern);
  cairo_surface_destroy (image);
  free (buffer);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1500 1501 1502
  delete imgStr;
}

1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525
void CairoOutputDev::drawMaskedImage(GfxState *state, Object *ref,
				Stream *str, int width, int height,
				GfxImageColorMap *colorMap,
				Stream *maskStr, int maskWidth,
				int maskHeight, GBool maskInvert)
{
  ImageStream *maskImgStr;
  maskImgStr = new ImageStream(maskStr, maskWidth, 1, 1);
  maskImgStr->reset();

  int row_stride = (maskWidth + 3) & ~3;
  unsigned char *maskBuffer;
  maskBuffer = (unsigned char *)gmalloc (row_stride * maskHeight);
  unsigned char *maskDest;
  cairo_surface_t *maskImage;
  cairo_pattern_t *maskPattern;
  Guchar *pix;
  int x, y;

  int invert_bit;
  
  invert_bit = maskInvert ? 1 : 0;

1526
  for (y = 0; y < maskHeight; y++) {
1527 1528
    pix = maskImgStr->getLine();
    maskDest = maskBuffer + y * row_stride;
1529
    for (x = 0; x < maskWidth; x++) {
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
      if (pix[x] ^ invert_bit)
	*maskDest++ = 0;
      else
	*maskDest++ = 255;
    }
  }

  maskImage = cairo_image_surface_create_for_data (maskBuffer, CAIRO_FORMAT_A8,
						 maskWidth, maskHeight, row_stride);

  delete maskImgStr;
  maskStr->close();

  unsigned char *buffer;
  unsigned int *dest;
  cairo_surface_t *image;
  cairo_pattern_t *pattern;
  ImageStream *imgStr;
  cairo_matrix_t matrix;
  int is_identity_transform;

  buffer = (unsigned char *)gmalloc (width * height * 4);

  /* TODO: Do we want to cache these? */
  imgStr = new ImageStream(str, width,
			   colorMap->getNumPixelComps(),
			   colorMap->getBits());
  imgStr->reset();
  
  /* ICCBased color space doesn't do any color correction
   * so check its underlying color space as well */
  is_identity_transform = colorMap->getColorSpace()->getMode() == csDeviceRGB ||
		  colorMap->getColorSpace()->getMode() == csICCBased && 
		  ((GfxICCBasedColorSpace*)colorMap->getColorSpace())->getAlt()->getMode() == csDeviceRGB;

  for (y = 0; y < height; y++) {
    dest = (unsigned int *) (buffer + y * 4 * width);
    pix = imgStr->getLine();
    colorMap->getRGBLine (pix, dest, width);
  }

  image = cairo_image_surface_create_for_data (buffer, CAIRO_FORMAT_RGB24,
						 width, height, width * 4);

1574 1575
  if (image == NULL) {
    delete imgStr;
1576
    return;
1577
  }
1578 1579
  pattern = cairo_pattern_create_for_surface (image);
  maskPattern = cairo_pattern_create_for_surface (maskImage);
1580 1581
  if (pattern == NULL) {
    delete imgStr;
1582
    return;
1583
  }
1584

1585 1586 1587 1588 1589
  LOG (printf ("drawMaskedImage %dx%d\n", width, height));

  cairo_matrix_init_translate (&matrix, 0, height);
  cairo_matrix_scale (&matrix, width, -height);

1590
  /* scale the mask to the size of the image unlike softMask */
1591
  cairo_pattern_set_matrix (pattern, &matrix);