CairoOutputDev.cc 73.4 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
// Copyright (C) 2005-2008 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
19
// Copyright (C) 2005, 2009 Albert Astals Cid <aacid@kde.org>
20
// Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
21
// Copyright (C) 2006-2010 Carlos Garcia Campos <carlosgc@gnome.org>
22
// Copyright (C) 2008 Carl Worth <cworth@cworth.org>
Albert Astals Cid's avatar
Albert Astals Cid committed
23
// Copyright (C) 2008-2010 Adrian Johnson <ajohnson@redneon.com>
24
// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
Albert Astals Cid's avatar
Albert Astals Cid committed
25
// Copyright (C) 2008, 2009 Chris Wilson <chris@chris-wilson.co.uk>
26
// Copyright (C) 2008 Hib Eris <hib@hiberis.nl>
27
// Copyright (C) 2009, 2010 David Benjamin <davidben@mit.edu>
28 29 30 31 32
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
Kristian Høgsberg's avatar
Kristian Høgsberg committed
33 34 35 36 37 38 39 40 41

#include <config.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

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

#include "goo/gfile.h"
#include "GlobalParams.h"
#include "Error.h"
#include "Object.h"
49
#include "Gfx.h"
Kristian Høgsberg's avatar
Kristian Høgsberg committed
50 51
#include "GfxState.h"
#include "GfxFont.h"
52
#include "Page.h"
Kristian Høgsberg's avatar
Kristian Høgsberg committed
53 54 55
#include "Link.h"
#include "CharCodeToUnicode.h"
#include "FontEncodingTables.h"
56
#include "PDFDocEncoding.h"
Kristian Høgsberg's avatar
Kristian Høgsberg committed
57 58 59 60
#include <fofi/FoFiTrueType.h>
#include <splash/SplashBitmap.h>
#include "CairoOutputDev.h"
#include "CairoFontEngine.h"
61
#include "CairoRescaleBox.h"
Kristian Høgsberg's avatar
Kristian Høgsberg committed
62 63
//------------------------------------------------------------------------

64
// #define LOG_CAIRO
Kristian Høgsberg's avatar
Kristian Høgsberg committed
65 66 67 68 69 70 71

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

72 73 74 75 76 77
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);
}

78 79 80 81
//------------------------------------------------------------------------
// CairoImage
//------------------------------------------------------------------------

82 83
CairoImage::CairoImage (double x1, double y1, double x2, double y2) {
  this->image = NULL;
84 85 86 87 88 89 90 91 92 93
  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
94

95 96 97 98 99 100
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
101 102 103 104
//------------------------------------------------------------------------
// CairoOutputDev
//------------------------------------------------------------------------

105 106 107 108 109 110 111 112 113
// 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;

114
CairoOutputDev::CairoOutputDev() {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
115
  xref = NULL;
116
  catalog = NULL;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
117

118 119 120 121 122
  if (!ft_lib_initialized) {
    FT_Init_FreeType(&ft_lib);
    ft_lib_initialized = gTrue;
  }

Kristian Høgsberg's avatar
Kristian Høgsberg committed
123
  fontEngine = NULL;
124
  fontEngine_owner = gFalse;
125
  glyphs = NULL;
126
  fill_pattern = NULL;
127
  fill_color.r = fill_color.g = fill_color.b = 0;
128
  stroke_pattern = NULL;
129
  stroke_color.r = stroke_color.g = stroke_color.b = 0;
130 131
  stroke_opacity = 1.0;
  fill_opacity = 1.0;
132
  textClipPath = NULL;
133
  haveCSPattern = gFalse;
134
  cairo = NULL;
135
  currentFont = NULL;
136
  prescaleImages = gTrue;
137
  printing = gTrue;
138
  inType3Char = gFalse;
139
  t3_glyph_has_bbox = gFalse;
140 141

  groupColorSpaceStack = NULL;
142
  maskStack = NULL;
143 144
  group = NULL;
  mask = NULL;
145 146 147
  shape = NULL;
  cairo_shape = NULL;
  knockoutCount = 0;
148 149

  text = NULL;
150
  actualText = NULL;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
151 152 153
}

CairoOutputDev::~CairoOutputDev() {
154
  if (fontEngine_owner && fontEngine) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
155 156
    delete fontEngine;
  }
157

158 159
  if (cairo)
    cairo_destroy (cairo);
160 161
  cairo_pattern_destroy (stroke_pattern);
  cairo_pattern_destroy (fill_pattern);
162 163
  if (group)
    cairo_pattern_destroy (group);
Chris Wilson's avatar
Chris Wilson committed
164 165
  if (mask)
    cairo_pattern_destroy (mask);
166 167
  if (shape)
    cairo_pattern_destroy (shape);
168
  if (text) 
169 170 171
    text->decRefCnt();
  if (actualText)
    delete actualText;  
172
}
Kristian Høgsberg's avatar
Kristian Høgsberg committed
173

174
void CairoOutputDev::setCairo(cairo_t *cairo)
175
{
176 177 178 179 180
  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));
    }
181
    cairo_destroy (this->cairo);
182
    assert(!cairo_shape);
183
  }
184
  if (cairo != NULL) {
185
    this->cairo = cairo_reference (cairo);
186 187 188 189
	/* 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 {
190
    this->cairo = NULL;
191
    this->cairo_shape = NULL;
192
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
193 194
}

195 196 197 198
void CairoOutputDev::setTextPage(TextPage *text)
{
  if (this->text) 
    this->text->decRefCnt();
199 200
  if (actualText)
    delete actualText;
201 202 203
  if (text) {
    this->text = text;
    this->text->incRefCnt();
204
    actualText = new ActualText(text);
205 206
  } else {
    this->text = NULL;
207
    actualText = NULL;
208 209 210
  }
}

211 212
void CairoOutputDev::startDoc(XRef *xrefA, Catalog *catalogA,
			      CairoFontEngine *parentFontEngine) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
213
  xref = xrefA;
214
  catalog = catalogA;
215 216 217 218 219 220 221 222
  if (parentFontEngine) {
    fontEngine = parentFontEngine;
  } else {
    if (fontEngine) {
      delete fontEngine;
    }
    fontEngine = new CairoFontEngine(ft_lib);
    fontEngine_owner = gTrue;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
223 224 225
  }
}

226 227 228 229
void CairoOutputDev::startPage(int pageNum, GfxState *state) {
  /* set up some per page defaults */
  cairo_pattern_destroy(fill_pattern);
  cairo_pattern_destroy(stroke_pattern);
230 231 232

  fill_pattern = cairo_pattern_create_rgb(0., 0., 0.);
  stroke_pattern = cairo_pattern_reference(fill_pattern);
233 234 235 236 237 238 239 240 241 242

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

void CairoOutputDev::endPage() {
  if (text) {
    text->endPage();
    text->coalesce(gTrue, gFalse);
  }
243 244
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
245 246 247 248 249 250
void CairoOutputDev::drawLink(Link *link, Catalog *catalog) {
}

void CairoOutputDev::saveState(GfxState *state) {
  LOG(printf ("save\n"));
  cairo_save (cairo);
251 252
  if (cairo_shape)
      cairo_save (cairo_shape);
253 254 255 256 257

  MaskStack *ms = new MaskStack;
  ms->mask = cairo_pattern_reference(mask);
  ms->next = maskStack;
  maskStack = ms;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
258 259 260 261 262
}

void CairoOutputDev::restoreState(GfxState *state) {
  LOG(printf ("restore\n"));
  cairo_restore (cairo);
263 264
  if (cairo_shape)
      cairo_restore (cairo_shape);
265 266 267 268 269 270 271

  /* These aren't restored by cairo_restore() since we keep them in
   * the output device. */
  updateFillColor(state);
  updateStrokeColor(state);
  updateFillOpacity(state);
  updateStrokeOpacity(state);
272
  updateBlendMode(state);
273 274

  MaskStack* ms = maskStack;
275
  if (ms) {
276 277
    if (mask)
      cairo_pattern_destroy(mask);
278 279 280 281
    mask = ms->mask;
    maskStack = ms->next;
    delete ms;
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
282 283 284 285 286 287 288 289 290 291 292
}

void CairoOutputDev::updateAll(GfxState *state) {
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
  updateFlatness(state);
  updateMiterLimit(state);
  updateFillColor(state);
  updateStrokeColor(state);
293 294
  updateFillOpacity(state);
  updateStrokeOpacity(state);
295
  updateBlendMode(state);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
296
  needFontUpdate = gTrue;
297 298
  if (text)
    text->updateFont(state);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
299 300
}

301 302 303 304 305 306 307 308 309
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];

310
  cairo_transform (cairo, &matrix);
311
  if (cairo_shape)
312
      cairo_transform (cairo_shape, &matrix);
313 314 315 316

  OutputDev::setDefaultCTM(ctm);
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
317 318 319
void CairoOutputDev::updateCTM(GfxState *state, double m11, double m12,
				double m21, double m22,
				double m31, double m32) {
320
  cairo_matrix_t matrix, invert_matrix;
321 322 323 324 325 326 327
  matrix.xx = m11;
  matrix.yx = m12;
  matrix.xy = m21;
  matrix.yy = m22;
  matrix.x0 = m31;
  matrix.y0 = m32;

328 329 330 331 332 333 334 335
  /* 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
336 337 338
   * instead of having to invert the matrix. */
  invert_matrix = matrix;
  if (cairo_matrix_invert(&invert_matrix)) {
339 340 341 342
    warning("matrix not invertible\n");
    return;
  }

343
  cairo_transform (cairo, &matrix);
344 345
  if (cairo_shape)
    cairo_transform (cairo_shape, &matrix);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
346 347 348 349 350 351 352 353 354 355 356 357
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
}

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

  state->getLineDash(&dashPattern, &dashLength, &dashStart);
358
  cairo_set_dash (cairo, dashPattern, dashLength, dashStart);
359 360
  if (cairo_shape)
    cairo_set_dash (cairo_shape, dashPattern, dashLength, dashStart);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
361 362 363
}

void CairoOutputDev::updateFlatness(GfxState *state) {
364
  // cairo_set_tolerance (cairo, state->getFlatness());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
365 366 367 368 369 370 371 372 373 374 375 376 377 378
}

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;
  }
379 380
  if (cairo_shape)
    cairo_set_line_join (cairo_shape, cairo_get_line_join(cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
381 382 383 384 385 386 387 388 389 390 391 392 393 394
}

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;
  }
395 396
  if (cairo_shape)
    cairo_set_line_cap (cairo_shape, cairo_get_line_cap(cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
397 398 399 400
}

void CairoOutputDev::updateMiterLimit(GfxState *state) {
  cairo_set_miter_limit (cairo, state->getMiterLimit());
401 402
  if (cairo_shape)
    cairo_set_miter_limit (cairo_shape, state->getMiterLimit());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
403 404
}

405
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
406

Kristian Høgsberg's avatar
Kristian Høgsberg committed
407
void CairoOutputDev::updateLineWidth(GfxState *state) {
408 409
  LOG(printf ("line width: %f\n", state->getLineWidth()));
  if (state->getLineWidth() == 0.0) {
410 411 412 413 414
    /* 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)));
415
  } else {
416
    cairo_set_line_width (cairo, state->getLineWidth());
417
  }
418 419
  if (cairo_shape)
    cairo_set_line_width (cairo_shape, cairo_get_line_width (cairo));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
420 421 422
}

void CairoOutputDev::updateFillColor(GfxState *state) {
423
  GfxRGB color = fill_color;
424

425 426 427 428 429 430
  state->getFillRGB(&fill_color);
  if (color.r != fill_color.r ||
      color.g != fill_color.g ||
      color.b != fill_color.b)
  {
    cairo_pattern_destroy(fill_pattern);
431 432 433
    fill_pattern = cairo_pattern_create_rgba(colToDbl(fill_color.r),
					     colToDbl(fill_color.g),
					     colToDbl(fill_color.b),
434 435 436 437 438
					     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
439 440 441
}

void CairoOutputDev::updateStrokeColor(GfxState *state) {
442
  GfxRGB color = stroke_color;
443

444 445 446 447 448 449
  state->getStrokeRGB(&stroke_color);
  if (color.r != stroke_color.r ||
      color.g != stroke_color.g ||
      color.b != stroke_color.b)
  {
    cairo_pattern_destroy(stroke_pattern);
450 451 452
    stroke_pattern = cairo_pattern_create_rgba(colToDbl(stroke_color.r),
					       colToDbl(stroke_color.g),
					       colToDbl(stroke_color.b),
453 454 455 456 457
					       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
458 459
}

460
void CairoOutputDev::updateFillOpacity(GfxState *state) {
461
  double opacity = fill_opacity;
462

463 464 465
  fill_opacity = state->getFillOpacity();
  if (opacity != fill_opacity) {
    cairo_pattern_destroy(fill_pattern);
466 467 468
    fill_pattern = cairo_pattern_create_rgba(colToDbl(fill_color.r),
					     colToDbl(fill_color.g),
					     colToDbl(fill_color.b),
469 470 471 472
					     fill_opacity);

    LOG(printf ("fill opacity: %f\n", fill_opacity));
  }
473 474 475
}

void CairoOutputDev::updateStrokeOpacity(GfxState *state) {
476
  double opacity = stroke_opacity;
477

478 479 480
  stroke_opacity = state->getStrokeOpacity();
  if (opacity != stroke_opacity) {
    cairo_pattern_destroy(stroke_pattern);
481 482 483
    stroke_pattern = cairo_pattern_create_rgba(colToDbl(stroke_color.r),
					       colToDbl(stroke_color.g),
					       colToDbl(stroke_color.b),
484 485 486 487
					       stroke_opacity);

    LOG(printf ("stroke opacity: %f\n", stroke_opacity));
  }
488 489
}

490 491 492 493
void CairoOutputDev::updateFillColorStop(GfxState *state, double offset) {
  state->getFillRGB(&fill_color);

  cairo_pattern_add_color_stop_rgba(fill_pattern, offset,
494 495 496
				    colToDbl(fill_color.r),
				    colToDbl(fill_color.g),
				    colToDbl(fill_color.b),
497 498 499 500 501
				    fill_opacity);
  LOG(printf ("fill color stop: %f (%d, %d, %d)\n",
	      offset, fill_color.r, fill_color.g, fill_color.b));
}

502
void CairoOutputDev::updateBlendMode(GfxState *state) {
503
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 4)
504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555
  switch (state->getBlendMode()) {
  default:
  case gfxBlendNormal:
    cairo_set_operator (cairo, CAIRO_OPERATOR_OVER);
    break;
  case gfxBlendMultiply:
    cairo_set_operator (cairo, CAIRO_OPERATOR_MULTIPLY);
    break;
  case gfxBlendScreen:
    cairo_set_operator (cairo, CAIRO_OPERATOR_SCREEN);
    break;
  case gfxBlendOverlay:
    cairo_set_operator (cairo, CAIRO_OPERATOR_OVERLAY);
    break;
  case gfxBlendDarken:
    cairo_set_operator (cairo, CAIRO_OPERATOR_DARKEN);
    break;
  case gfxBlendLighten:
    cairo_set_operator (cairo, CAIRO_OPERATOR_LIGHTEN);
    break;
  case gfxBlendColorDodge:
    cairo_set_operator (cairo, CAIRO_OPERATOR_COLOR_DODGE);
    break;
  case gfxBlendColorBurn:
    cairo_set_operator (cairo, CAIRO_OPERATOR_COLOR_BURN);
    break;
  case gfxBlendHardLight:
    cairo_set_operator (cairo, CAIRO_OPERATOR_HARD_LIGHT);
    break;
  case gfxBlendSoftLight:
    cairo_set_operator (cairo, CAIRO_OPERATOR_SOFT_LIGHT);
    break;
  case gfxBlendDifference:
    cairo_set_operator (cairo, CAIRO_OPERATOR_DIFFERENCE);
    break;
  case gfxBlendExclusion:
    cairo_set_operator (cairo, CAIRO_OPERATOR_EXCLUSION);
    break;
  case gfxBlendHue:
    cairo_set_operator (cairo, CAIRO_OPERATOR_HSL_HUE);
    break;
  case gfxBlendSaturation:
    cairo_set_operator (cairo, CAIRO_OPERATOR_HSL_SATURATION);
    break;
  case gfxBlendColor:
    cairo_set_operator (cairo, CAIRO_OPERATOR_HSL_COLOR);
    break;
  case gfxBlendLuminosity:
    cairo_set_operator (cairo, CAIRO_OPERATOR_HSL_LUMINOSITY);
    break;
  }
  LOG(printf ("blend mode: %d\n", (int)state->getBlendMode()));
556
#endif /* CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 9, 4) */
557 558
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
559
void CairoOutputDev::updateFont(GfxState *state) {
560
  cairo_font_face_t *font_face;
561
  cairo_matrix_t matrix, invert_matrix;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
562 563

  LOG(printf ("updateFont() font=%s\n", state->getFont()->getName()->getCString()));
564

Kristian Høgsberg's avatar
Kristian Høgsberg committed
565 566
  needFontUpdate = gFalse;

567 568 569 570
  //FIXME: use cairo font engine?
  if (text)
    text->updateFont(state);
  
571
  currentFont = fontEngine->getFont (state->getFont(), xref, catalog, printing);
572

573 574
  if (!currentFont)
    return;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
575

576 577
  font_face = currentFont->getFontFace();
  cairo_set_font_face (cairo, font_face);
578 579 580
 
  double fontSize = state->getFontSize();
  double *m = state->getTextMat();
581 582 583 584 585 586
  /* 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;
587 588
  matrix.xy = -m[2] * fontSize;
  matrix.yy = -m[3] * fontSize;
589 590
  matrix.x0 = 0;
  matrix.y0 = 0;
591

592 593
  LOG(printf ("font matrix: %f %f %f %f\n", matrix.xx, matrix.yx, matrix.xy, matrix.yy));

594 595 596 597 598 599 600 601 602 603 604 605
 /* 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;
  }

606
  cairo_set_font_matrix (cairo, &matrix);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
607 608
}

609 610 611 612 613 614 615 616 617
void CairoOutputDev::updateRender(GfxState *state) {
  int rm;
  rm = state->getRender();
  if (rm == 7 && haveCSPattern) {
    haveCSPattern = gFalse;
    restoreState(state);
  }
}

618
void CairoOutputDev::doPath(cairo_t *cairo, GfxState *state, GfxPath *path) {
Kristian Høgsberg's avatar
Kristian Høgsberg committed
619 620
  GfxSubpath *subpath;
  int i, j;
621
  cairo_new_path (cairo);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
622 623 624
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
625 626
      cairo_move_to (cairo, subpath->getX(0), subpath->getY(0));
         j = 1;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
627 628
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
629 630 631 632 633
	  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
634 635
	  j += 3;
	} else {
636
	  cairo_line_to (cairo, subpath->getX(j), subpath->getY(j));
Kristian Høgsberg's avatar
Kristian Høgsberg committed
637 638 639 640 641 642 643 644 645 646 647 648
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	LOG (printf ("close\n"));
	cairo_close_path (cairo);
      }
    }
  }
}

void CairoOutputDev::stroke(GfxState *state) {
649 650 651 652 653 654 655
  if (inType3Char) {
      GfxGray gray;
      state->getFillGray(&gray);
      if (colToDbl(gray) > 0.5)
	  return;
  }

656
  doPath (cairo, state, state->getPath());
657
  cairo_set_source (cairo, stroke_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
658 659
  LOG(printf ("stroke\n"));
  cairo_stroke (cairo);
660 661 662 663
  if (cairo_shape) {
    doPath (cairo_shape, state, state->getPath());
    cairo_stroke (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
664 665 666
}

void CairoOutputDev::fill(GfxState *state) {
667 668 669 670 671 672 673
  if (inType3Char) {
      GfxGray gray;
      state->getFillGray(&gray);
      if (colToDbl(gray) > 0.5)
	  return;
  }

674
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
675
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_WINDING);
676
  cairo_set_source (cairo, fill_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
677
  LOG(printf ("fill\n"));
678
  //XXX: how do we get the path
679 680 681 682 683 684
  if (mask) {
    cairo_clip (cairo);
    cairo_mask (cairo, mask);
  } else {
    cairo_fill (cairo);
  }
685 686 687 688 689
  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
690 691 692
}

void CairoOutputDev::eoFill(GfxState *state) {
693
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
694
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_EVEN_ODD);
695
  cairo_set_source (cairo, fill_pattern);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
696 697
  LOG(printf ("fill-eo\n"));
  cairo_fill (cairo);
698 699 700 701 702 703 704

  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
705 706
}

707 708 709 710 711 712 713 714 715 716 717 718 719
GBool CairoOutputDev::tilingPatternFill(GfxState *state, Object *str,
					int paintType, Dict *resDict,
					double *mat, double *bbox,
					int x0, int y0, int x1, int y1,
					double xStep, double yStep)
{
  PDFRectangle box;
  Gfx *gfx;
  cairo_pattern_t *pattern;
  cairo_surface_t *surface;
  cairo_matrix_t matrix;
  cairo_t *old_cairo;
  double xMin, yMin, xMax, yMax;
720
  double width, height;
721

722 723 724 725
  width = bbox[2] - bbox[0];
  height = bbox[3] - bbox[1];

  if (xStep != width || yStep != height)
726 727 728 729 730
    return gFalse;
  /* TODO: implement the other cases here too */

  surface = cairo_surface_create_similar (cairo_get_target (cairo),
					  CAIRO_CONTENT_COLOR_ALPHA,
731
					  width, height);
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
  if (cairo_surface_status (surface))
    return gFalse;

  old_cairo = cairo;
  cairo = cairo_create (surface);
  cairo_surface_destroy (surface);

  box.x1 = bbox[0]; box.y1 = bbox[1];
  box.x2 = bbox[2]; box.y2 = bbox[3];
  gfx = new Gfx(xref, this, resDict, catalog, &box, NULL);
  gfx->display(str);
  delete gfx;

  pattern = cairo_pattern_create_for_surface (cairo_get_target (cairo));
  cairo_destroy (cairo);
  cairo = old_cairo;
  if (cairo_pattern_status (pattern))
    return gFalse;

  state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
  cairo_rectangle (cairo, xMin, yMin, xMax - xMin, yMax - yMin);

754 755 756
  cairo_matrix_init_scale (&matrix, (int)width / width, (int)height / height);
  cairo_pattern_set_matrix (pattern, &matrix);

757 758 759 760 761 762 763 764 765 766 767
  cairo_matrix_init (&matrix, mat[0], mat[1], mat[2], mat[3], mat[4], mat[5]);
  cairo_transform (cairo, &matrix);
  cairo_set_source (cairo, pattern);
  cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
  cairo_fill (cairo);

  cairo_pattern_destroy (pattern);

  return gTrue;
}

768 769 770 771 772 773 774 775 776 777 778
GBool CairoOutputDev::axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax) {
  double x0, y0, x1, y1;
  double dx, dy;

  shading->getCoords(&x0, &y0, &x1, &y1);
  dx = x1 - x0;
  dy = y1 - y0;

  cairo_pattern_destroy(fill_pattern);
  fill_pattern = cairo_pattern_create_linear (x0 + tMin * dx, y0 + tMin * dy,
					      x0 + tMax * dx, y0 + tMax * dy);
779 780 781 782
  if (!shading->getExtend0() && !shading->getExtend1())
    cairo_pattern_set_extend (fill_pattern, CAIRO_EXTEND_NONE);
  else
    cairo_pattern_set_extend (fill_pattern, CAIRO_EXTEND_PAD);
783

784 785
  LOG (printf ("axial-sh\n"));

786 787 788 789 790
  // TODO: use the actual stops in the shading in the case
  // of linear interpolation (Type 2 Exponential functions with N=1)
  return gFalse;
}

791 792 793 794 795
GBool CairoOutputDev::axialShadedSupportExtend(GfxState *state, GfxAxialShading *shading)
{
  return (shading->getExtend0() == shading->getExtend1());
}

796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
GBool CairoOutputDev::radialShadedFill(GfxState *state, GfxRadialShading *shading, double sMin, double sMax) {
  double x0, y0, r0, x1, y1, r1;
  double dx, dy, dr;

  shading->getCoords(&x0, &y0, &r0, &x1, &y1, &r1);
  dx = x1 - x0;
  dy = y1 - y0;
  dr = r1 - r0;
  cairo_pattern_destroy(fill_pattern);
  fill_pattern = cairo_pattern_create_radial (x0 + sMin * dx,
					      y0 + sMin * dy,
					      r0 + sMin * dr,
					      x0 + sMax * dx,
					      y0 + sMax * dy,
					      r0 + sMax * dr);
  if (shading->getExtend0() && shading->getExtend1())
    cairo_pattern_set_extend (fill_pattern, CAIRO_EXTEND_PAD);
  else
    cairo_pattern_set_extend (fill_pattern, CAIRO_EXTEND_NONE);

816 817
  LOG (printf ("radial-sh\n"));

818 819 820 821 822 823 824 825
  return gFalse;
}

GBool CairoOutputDev::radialShadedSupportExtend(GfxState *state, GfxRadialShading *shading)
{
  return (shading->getExtend0() == shading->getExtend1());
}

826
void CairoOutputDev::clip(GfxState *state) {
827
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
828 829 830
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_WINDING);
  cairo_clip (cairo);
  LOG (printf ("clip\n"));
831 832 833 834 835
  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
836 837 838
}

void CairoOutputDev::eoClip(GfxState *state) {
839
  doPath (cairo, state, state->getPath());
Kristian Høgsberg's avatar
Kristian Høgsberg committed
840 841 842
  cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_EVEN_ODD);
  cairo_clip (cairo);
  LOG (printf ("clip-eo\n"));
843 844 845 846 847 848
  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
849 850
}

851 852 853 854
void CairoOutputDev::clipToStrokePath(GfxState *state) {
  LOG(printf("clip-to-stroke-path\n"));
}

855
void CairoOutputDev::beginString(GfxState *state, GooString *s)
856 857
{
  int len = s->getLength();
858

859 860 861
  if (needFontUpdate)
    updateFont(state);

862 863 864
  if (!currentFont)
    return;

865
  glyphs = (cairo_glyph_t *) gmallocn (len, sizeof (cairo_glyph_t));
866 867 868 869 870 871
  glyphCount = 0;
}

void CairoOutputDev::drawChar(GfxState *state, double x, double y,
			      double dx, double dy,
			      double originX, double originY,
872
			      CharCode code, int nBytes, Unicode *u, int uLen)
873
{
874 875 876 877 878 879 880 881
  if (currentFont) {
    glyphs[glyphCount].index = currentFont->getGlyph (code, u, uLen);
    glyphs[glyphCount].x = x - originX;
    glyphs[glyphCount].y = y - originY;
    glyphCount++;
  }

  if (!text)
882
    return;
883
  actualText->addChar (state, x, y, dx, dy, code, nBytes, u, uLen);
884 885 886 887 888 889 890
}

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

  if (!currentFont)
Kristian Høgsberg's avatar
Kristian Høgsberg committed
891
    return;
892 893 894 895 896 897 898

  // 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;

899 900
  // ignore empty strings and invisible text -- this is used by
  // Acrobat Capture
Kristian Høgsberg's avatar
Kristian Høgsberg committed
901
  render = state->getRender();
902
  if (render == 3 || glyphCount == 0) {
903 904
    gfree(glyphs);
    glyphs = NULL;
905
    return;
906
  }
907
  
Kristian Høgsberg's avatar
Kristian Høgsberg committed
908
  if (!(render & 1)) {
909
    LOG (printf ("fill string\n"));
910
    cairo_set_source (cairo, fill_pattern);
911
    cairo_show_glyphs (cairo, glyphs, glyphCount);
912 913
    if (cairo_shape)
      cairo_show_glyphs (cairo_shape, glyphs, glyphCount);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
914
  }
915
  
Kristian Høgsberg's avatar
Kristian Høgsberg committed
916 917
  // stroke
  if ((render & 3) == 1 || (render & 3) == 2) {
918
    LOG (printf ("stroke string\n"));
919
    cairo_set_source (cairo, stroke_pattern);
920
    cairo_glyph_path (cairo, glyphs, glyphCount);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
921
    cairo_stroke (cairo);
922 923 924 925
    if (cairo_shape) {
      cairo_glyph_path (cairo_shape, glyphs, glyphCount);
      cairo_stroke (cairo_shape);
    }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
926 927 928 929
  }

  // clip
  if (render & 4) {
930
    LOG (printf ("clip string\n"));
931 932 933 934 935
    // append the glyph path to textClipPath.

    // set textClipPath as the currentPath
    if (textClipPath) {
      cairo_append_path (cairo, textClipPath);
936 937 938
      if (cairo_shape) {
	cairo_append_path (cairo_shape, textClipPath);
      }
939 940 941 942
      cairo_path_destroy (textClipPath);
    }
    
    // append the glyph path
943
    cairo_glyph_path (cairo, glyphs, glyphCount);
944 945 946 947 948
   
    // move the path back into textClipPath 
    // and clear the current path
    textClipPath = cairo_copy_path (cairo);
    cairo_new_path (cairo);
949 950 951
    if (cairo_shape) {
      cairo_new_path (cairo_shape);
    }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
952
  }
953

954
  gfree (glyphs);
955
  glyphs = NULL;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
956 957
}

958

Kristian Høgsberg's avatar
Kristian Høgsberg committed
959 960 961
GBool CairoOutputDev::beginType3Char(GfxState *state, double x, double y,
				      double dx, double dy,
				      CharCode code, Unicode *u, int uLen) {
962 963 964 965 966 967 968 969 970 971 972 973

  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];
974 975 976 977
  /* 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);
978 979 980 981 982
  if (cairo_shape) {
    cairo_save (cairo_shape);
    cairo_set_matrix(cairo_shape, &orig_matrix);
    cairo_transform(cairo_shape, &matrix);
  }
983 984
  cairo_pattern_destroy(stroke_pattern);
  cairo_pattern_reference(fill_pattern);
985
  stroke_pattern = fill_pattern;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
986 987 988 989
  return gFalse;
}

void CairoOutputDev::endType3Char(GfxState *state) {
990
  cairo_restore (cairo);
991 992 993
  if (cairo_shape) {
    cairo_restore (cairo_shape);
  }
Kristian Høgsberg's avatar
Kristian Høgsberg committed
994 995 996
}

void CairoOutputDev::type3D0(GfxState *state, double wx, double wy) {
997 998
  t3_glyph_wx = wx;
  t3_glyph_wy = wy;
Kristian Høgsberg's avatar
Kristian Høgsberg committed
999 1000 1001
}

void CairoOutputDev::type3D1(GfxState *state, double wx, double wy,
1002
			     double llx, double lly, double urx, double ury) {
1003 1004 1005 1006 1007 1008 1009
  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
1010 1011
}

1012 1013 1014 1015 1016 1017 1018 1019 1020
void CairoOutputDev::beginTextObject(GfxState *state) {
  if (state->getFillColorSpace()->getMode() == csPattern) {
    haveCSPattern = gTrue;
    saveState(state);
    savedRender = state->getRender();
    state->setRender(7); // Set clip to text path
  }
}

Kristian Høgsberg's avatar
Kristian Høgsberg committed
1021
void CairoOutputDev::endTextObject(GfxState *state) {
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
  if (haveCSPattern) {
    state->setRender(savedRender);
    haveCSPattern = gFalse;
    if (state->getFillColorSpace()->getMode() != csPattern) {
      if (textClipPath) {
	cairo_new_path (cairo);
	cairo_append_path (cairo, textClipPath);
	cairo_set_fill_rule (cairo, CAIRO_FILL_RULE_WINDING);
	cairo_set_source (cairo, fill_pattern);
	cairo_fill (cairo);
	if (cairo_shape) {
	  cairo_new_path (cairo_shape);
	  cairo_append_path (cairo_shape, textClipPath);
	  cairo_set_fill_rule (cairo_shape, CAIRO_FILL_RULE_WINDING);
	  cairo_fill (cairo_shape);
	}
	cairo_path_destroy (textClipPath);
	textClipPath = NULL;
      }
      restoreState(state);
      updateFillColor(state);
    }
  }

1046 1047 1048 1049
  if (textClipPath) {
    // clip the accumulated text path
    cairo_append_path (cairo, textClipPath);
    cairo_clip (cairo);
1050 1051 1052 1053
    if (cairo_shape) {
      cairo_append_path (cairo_shape, textClipPath);
      cairo_clip (cairo_shape);
    }
1054 1055 1056
    cairo_path_destroy (textClipPath);
    textClipPath = NULL;
  }
1057
}
1058

1059 1060
void CairoOutputDev::beginMarkedContent(char *name, Dict *properties)
{
1061 1062
  if (text)
    actualText->beginMC(properties);
1063 1064 1065 1066
}

void CairoOutputDev::endMarkedContent(GfxState *state)
{
1067 1068
  if (text)
    actualText->endMC(state);
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1069 1070
}

1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
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);
}

1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
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;
}



1113 1114
void CairoOutputDev::beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
                                      GfxColorSpace * blendingColorSpace,
1115
                                      GBool /*isolated*/, GBool knockout,
1116 1117 1118 1119
				      GBool forSoftMask) {
  /* push color space */
  ColorSpaceStack* css = new ColorSpaceStack;
  css->cs = blendingColorSpace;
1120
  css->knockout = knockout;
1121 1122
  css->next = groupColorSpaceStack;
  groupColorSpaceStack = css;
1123 1124 1125

  LOG(printf ("begin transparency group. knockout: %s\n", knockout ? "yes":"no"));

1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
  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);
  }
1148 1149 1150 1151
  if (0 && forSoftMask)
    cairo_push_group_with_content (cairo, CAIRO_CONTENT_ALPHA);
  else
    cairo_push_group (cairo);
1152 1153 1154 1155 1156 1157 1158 1159

  /* 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);
  }
1160
}
1161

1162 1163 1164 1165
void CairoOutputDev::endTransparencyGroup(GfxState * /*state*/) {
  if (group)
    cairo_pattern_destroy(group);
  group = cairo_pop_group (cairo);
1166

1167 1168
  LOG(printf ("end transparency group\n"));

1169 1170 1171 1172 1173
  if (groupColorSpaceStack->next && groupColorSpaceStack->next->knockout) {
    if (shape)
      cairo_pattern_destroy(shape);
    shape = cairo_pop_group (cairo_shape);
  }
1174
}
1175

1176 1177 1178
void CairoOutputDev::paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {
  cairo_set_source (cairo, group);

1179 1180
  LOG(printf ("paint transparency group\n"));

1181
  if (!mask) {
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
    //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));
1209 1210 1211 1212 1213 1214 1215
  } else {
    cairo_mask(cairo, mask);

    cairo_pattern_destroy(mask);
    mask = NULL;
  }

1216
  popTransparencyGroup();
1217 1218 1219 1220 1221 1222 1223 1224 1225
}

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;
1226 1227
  // an arbitrary integer approximation of .3*r + .59*g + .11*b
  int y = (r*19661+g*38666+b*7209 + 32829)>>16;
1228 1229 1230 1231
  return y << 24;
}


1232
/* XXX: do we need to deal with shape here? */
1233 1234
void CairoOutputDev::setSoftMask(GfxState * state, double * bbox, GBool alpha,
                                 Function * transferFunc, GfxColor * backdropColor) {
Chris Wilson's avatar
Chris Wilson committed
1235 1236
  cairo_pattern_destroy(mask);

1237 1238
  LOG(printf ("set softMask\n"));

1239 1240 1241 1242 1243
  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. */

1244
    double x1, y1, x2, y2, tmp;
1245
    cairo_clip_extents(cairo, &x1, &y1, &x2, &y2);
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
    cairo_user_to_device(cairo, &x1, &y1);
    cairo_user_to_device(cairo, &x2, &y2);
    if (x1 > x2) {
      tmp = x1;
      x1 = x2;
      x2 = tmp;
    }

    if (y1 > y2) {
      tmp = y1;
      y1 = y2;
      y2 = tmp;
    }

1260 1261
    int width = (int)(ceil(x2) - floor(x1));
    int height = (int)(ceil(y2) - floor(y1));
1262 1263 1264 1265 1266 1267 1268 1269

    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 */
1270 1271 1272 1273
    cairo_set_source_rgb(maskCtx,
			 colToDbl(backdropColorRGB.r),
			 colToDbl(backdropColorRGB.g),
			 colToDbl(backdropColorRGB.b));
1274
    cairo_paint(maskCtx);
1275 1276 1277 1278 1279

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

1280 1281
    /* make the device offset of the new mask match that of the group */
    double x_offset, y_offset;
1282 1283 1284 1285 1286 1287 1288
    if (cairo_get_group_target(cairo) == cairo_get_target(cairo)) {
      cairo_surface_get_device_offset(cairo_get_group_target(cairo), &x_offset, &y_offset);
    } else {
      cairo_surface_t *pats;
      cairo_pattern_get_surface(group, &pats);
      cairo_surface_get_device_offset(pats, &x_offset, &y_offset);
    }
1289 1290
    cairo_surface_set_device_offset(source, x_offset, y_offset);

1291 1292 1293 1294
    /* paint the group */
    cairo_set_source(maskCtx, group);
    cairo_paint(maskCtx);

Chris Wilson's avatar
Chris Wilson committed
1295 1296 1297
    /* XXX status = cairo_status(maskCtx); */
    cairo_destroy(maskCtx);

1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
    /* 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

      }
    }
Chris Wilson's avatar
Chris Wilson committed
1319
    cairo_surface_mark_dirty (source);
1320 1321 1322

    /* setup the new mask pattern */
    mask = cairo_pattern_create_for_surface(source);
1323 1324 1325 1326 1327 1328 1329 1330

    if (cairo_get_group_target(cairo) == cairo_get_target(cairo)) {
      cairo_pattern_set_matrix(mask, &mat);
    } else {
      cairo_matrix_t patMatrix;
      cairo_pattern_get_matrix(group, &patMatrix);
      cairo_pattern_set_matrix(mask, &patMatrix);
    }
1331 1332 1333

    cairo_surface_destroy(source);
  } else {
Chris Wilson's avatar
Chris Wilson committed
1334
    mask = cairo_pattern_reference(group);
1335
  }
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353

  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;
1354 1355
}

1356

1357
void CairoOutputDev::clearSoftMask(GfxState * /*state*/) {
1358 1359 1360
  if (mask)
    cairo_pattern_destroy(mask);
  mask = NULL;
1361
}
Kristian Høgsberg's avatar
Kristian Høgsberg committed
1362

1363 1364 1365 1366
void CairoOutputDev::endMaskClip(GfxState *state) {
  clearSoftMask(state);
}

1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382