DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (27a812186ff4)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
/* cairo - a vector graphics library with display and print output
 *
 * Copyright © 2005 Red Hat, Inc
 * Copyright © 2007 Adrian Johnson
 *
 * This library is free software; you can redistribute it and/or
 * modify it either under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation
 * (the "LGPL") or, at your option, under the terms of the Mozilla
 * Public License Version 1.1 (the "MPL"). If you do not alter this
 * notice, a recipient may use your version of this file under either
 * the MPL or the LGPL.
 *
 * You should have received a copy of the LGPL along with this library
 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
 * You should have received a copy of the MPL along with this library
 * in the file COPYING-MPL-1.1
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
 * the specific language governing rights and limitations.
 *
 * The Original Code is the cairo graphics library.
 *
 * The Initial Developer of the Original Code is Red Hat, Inc.
 *
 * Contributor(s):
 *	Carl Worth <cworth@cworth.org>
 *	Keith Packard <keithp@keithp.com>
 *	Adrian Johnson <ajohnson@redneon.com>
 */

/* The paginated surface layer exists to provide as much code sharing
 * as possible for the various paginated surface backends in cairo
 * (PostScript, PDF, etc.). See cairo-paginated-private.h for
 * more details on how it works and how to use it.
 */

#include "cairoint.h"

#include "cairo-paginated-private.h"
#include "cairo-paginated-surface-private.h"
#include "cairo-recording-surface-private.h"
#include "cairo-analysis-surface-private.h"
#include "cairo-error-private.h"

static const cairo_surface_backend_t cairo_paginated_surface_backend;

static cairo_int_status_t
_cairo_paginated_surface_show_page (void *abstract_surface);

static cairo_surface_t *
_cairo_paginated_surface_create_similar (void			*abstract_surface,
					 cairo_content_t	 content,
					 int			 width,
					 int			 height)
{
    cairo_rectangle_t rect;
    rect.x = rect.y = 0.;
    rect.width = width;
    rect.height = height;
    return cairo_recording_surface_create (content, &rect);
}

static cairo_surface_t *
_create_recording_surface_for_target (cairo_surface_t *target,
				      cairo_content_t content)
{
    cairo_rectangle_int_t rect;

    if (_cairo_surface_get_extents (target, &rect)) {
	cairo_rectangle_t recording_extents;

	recording_extents.x = rect.x;
	recording_extents.y = rect.y;
	recording_extents.width = rect.width;
	recording_extents.height = rect.height;

	return cairo_recording_surface_create (content, &recording_extents);
    } else {
	return cairo_recording_surface_create (content, NULL);
    }
}

cairo_surface_t *
_cairo_paginated_surface_create (cairo_surface_t				*target,
				 cairo_content_t				 content,
				 const cairo_paginated_surface_backend_t	*backend)
{
    cairo_paginated_surface_t *surface;
    cairo_status_t status;

    surface = malloc (sizeof (cairo_paginated_surface_t));
    if (unlikely (surface == NULL)) {
	status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
	goto FAIL;
    }

    _cairo_surface_init (&surface->base,
			 &cairo_paginated_surface_backend,
			 NULL, /* device */
			 content);

    /* Override surface->base.type with target's type so we don't leak
     * evidence of the paginated wrapper out to the user. */
    surface->base.type = target->type;

    surface->target = cairo_surface_reference (target);

    surface->content = content;
    surface->backend = backend;

    surface->recording_surface = _create_recording_surface_for_target (target, content);
    status = surface->recording_surface->status;
    if (unlikely (status))
	goto FAIL_CLEANUP_SURFACE;

    surface->page_num = 1;
    surface->base.is_clear = TRUE;

    return &surface->base;

  FAIL_CLEANUP_SURFACE:
    cairo_surface_destroy (target);
    free (surface);
  FAIL:
    return _cairo_surface_create_in_error (status);
}

cairo_bool_t
_cairo_surface_is_paginated (cairo_surface_t *surface)
{
    return surface->backend == &cairo_paginated_surface_backend;
}

cairo_surface_t *
_cairo_paginated_surface_get_target (cairo_surface_t *surface)
{
    cairo_paginated_surface_t *paginated_surface;

    assert (_cairo_surface_is_paginated (surface));

    paginated_surface = (cairo_paginated_surface_t *) surface;

    return paginated_surface->target;
}

static cairo_status_t
_cairo_paginated_surface_finish (void *abstract_surface)
{
    cairo_paginated_surface_t *surface = abstract_surface;
    cairo_status_t status = CAIRO_STATUS_SUCCESS;

    if (! surface->base.is_clear || surface->page_num == 1) {
	/* Bypass some of the sanity checking in cairo-surface.c, as we
	 * know that the surface is finished...
	 */
	status = _cairo_paginated_surface_show_page (surface);
    }

     /* XXX We want to propagate any errors from destroy(), but those are not
      * returned via the api. So we need to explicitly finish the target,
      * and check the status afterwards. However, we can only call finish()
      * on the target, if we own it.
      */
    if (CAIRO_REFERENCE_COUNT_GET_VALUE (&surface->target->ref_count) == 1)
	cairo_surface_finish (surface->target);
    if (status == CAIRO_STATUS_SUCCESS)
	status = cairo_surface_status (surface->target);
    cairo_surface_destroy (surface->target);

    cairo_surface_finish (surface->recording_surface);
    if (status == CAIRO_STATUS_SUCCESS)
	status = cairo_surface_status (surface->recording_surface);
    cairo_surface_destroy (surface->recording_surface);

    return status;
}

static cairo_surface_t *
_cairo_paginated_surface_create_image_surface (void	       *abstract_surface,
					       int		width,
					       int		height)
{
    cairo_paginated_surface_t *surface = abstract_surface;
    cairo_surface_t *image;
    cairo_font_options_t options;

    image = _cairo_image_surface_create_with_content (surface->content,
						      width,
						      height);

    cairo_surface_get_font_options (&surface->base, &options);
    _cairo_surface_set_font_options (image, &options);

    return image;
}

static cairo_status_t
_cairo_paginated_surface_acquire_source_image (void	       *abstract_surface,
					       cairo_image_surface_t **image_out,
					       void		   **image_extra)
{
    cairo_paginated_surface_t *surface = abstract_surface;
    cairo_bool_t is_bounded;
    cairo_surface_t *image;
    cairo_status_t status;
    cairo_rectangle_int_t extents;

    is_bounded = _cairo_surface_get_extents (surface->target, &extents);
    if (! is_bounded)
	return CAIRO_INT_STATUS_UNSUPPORTED;

    image = _cairo_paginated_surface_create_image_surface (surface,
							   extents.width,
							   extents.height);

    status = _cairo_recording_surface_replay (surface->recording_surface, image);
    if (unlikely (status)) {
	cairo_surface_destroy (image);
	return status;
    }

    *image_out = (cairo_image_surface_t*) image;
    *image_extra = NULL;

    return CAIRO_STATUS_SUCCESS;
}

static void
_cairo_paginated_surface_release_source_image (void	  *abstract_surface,
					       cairo_image_surface_t *image,
					       void	       *image_extra)
{
    cairo_surface_destroy (&image->base);
}

static cairo_int_status_t
_paint_fallback_image (cairo_paginated_surface_t *surface,
		       cairo_rectangle_int_t     *rect)
{
    double x_scale = surface->base.x_fallback_resolution / surface->target->x_resolution;
    double y_scale = surface->base.y_fallback_resolution / surface->target->y_resolution;
    int x, y, width, height;
    cairo_status_t status;
    cairo_surface_t *image;
    cairo_surface_pattern_t pattern;
    cairo_clip_t clip;

    x = rect->x;
    y = rect->y;
    width = rect->width;
    height = rect->height;
    image = _cairo_paginated_surface_create_image_surface (surface,
							   ceil (width  * x_scale),
							   ceil (height * y_scale));
    _cairo_surface_set_device_scale (image, x_scale, y_scale);
    /* set_device_offset just sets the x0/y0 components of the matrix;
     * so we have to do the scaling manually. */
    cairo_surface_set_device_offset (image, -x*x_scale, -y*y_scale);

    status = _cairo_recording_surface_replay (surface->recording_surface, image);
    if (unlikely (status))
	goto CLEANUP_IMAGE;

    _cairo_pattern_init_for_surface (&pattern, image);
    cairo_matrix_init (&pattern.base.matrix,
		       x_scale, 0, 0, y_scale, -x*x_scale, -y*y_scale);
    /* the fallback should be rendered at native resolution, so disable
     * filtering (if possible) to avoid introducing potential artifacts. */
    pattern.base.filter = CAIRO_FILTER_NEAREST;

    _cairo_clip_init (&clip);
    status = _cairo_clip_rectangle (&clip, rect);
    if (likely (status == CAIRO_STATUS_SUCCESS)) {
	status = _cairo_surface_paint (surface->target,
				       CAIRO_OPERATOR_SOURCE,
				       &pattern.base, &clip);
    }

    _cairo_clip_fini (&clip);
    _cairo_pattern_fini (&pattern.base);

CLEANUP_IMAGE:
    cairo_surface_destroy (image);

    return status;
}

static cairo_int_status_t
_paint_page (cairo_paginated_surface_t *surface)
{
    cairo_surface_t *analysis;
    cairo_status_t status;
    cairo_bool_t has_supported, has_page_fallback, has_finegrained_fallback;

    if (unlikely (surface->target->status))
	return surface->target->status;

    analysis = _cairo_analysis_surface_create (surface->target);
    if (unlikely (analysis->status))
	return _cairo_surface_set_error (surface->target, analysis->status);

    surface->backend->set_paginated_mode (surface->target,
	                                  CAIRO_PAGINATED_MODE_ANALYZE);
    status = _cairo_recording_surface_replay_and_create_regions (surface->recording_surface,
								 analysis);
    if (status || analysis->status) {
	if (status == CAIRO_STATUS_SUCCESS)
	    status = analysis->status;
	goto FAIL;
    }

     if (surface->backend->set_bounding_box) {
	 cairo_box_t bbox;

	 _cairo_analysis_surface_get_bounding_box (analysis, &bbox);
	 status = surface->backend->set_bounding_box (surface->target, &bbox);
	 if (unlikely (status))
	     goto FAIL;
     }

    if (surface->backend->set_fallback_images_required) {
	cairo_bool_t has_fallbacks = _cairo_analysis_surface_has_unsupported (analysis);

	status = surface->backend->set_fallback_images_required (surface->target,
								 has_fallbacks);
	if (unlikely (status))
	    goto FAIL;
    }

    /* Finer grained fallbacks are currently only supported for some
     * surface types */
    if (surface->backend->supports_fine_grained_fallbacks != NULL &&
	surface->backend->supports_fine_grained_fallbacks (surface->target))
    {
	has_supported = _cairo_analysis_surface_has_supported (analysis);
	has_page_fallback = FALSE;
	has_finegrained_fallback = _cairo_analysis_surface_has_unsupported (analysis);
    }
    else
    {
	if (_cairo_analysis_surface_has_unsupported (analysis)) {
	    has_supported = FALSE;
	    has_page_fallback = TRUE;
	} else {
	    has_supported = TRUE;
	    has_page_fallback = FALSE;
	}
	has_finegrained_fallback = FALSE;
    }

    if (has_supported) {
	surface->backend->set_paginated_mode (surface->target,
		                              CAIRO_PAGINATED_MODE_RENDER);

	status = _cairo_recording_surface_replay_region (surface->recording_surface,
							 NULL,
							 surface->target,
							 CAIRO_RECORDING_REGION_NATIVE);
	assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
	if (unlikely (status))
	    goto FAIL;
    }

    if (has_page_fallback) {
	cairo_rectangle_int_t extents;
	cairo_bool_t is_bounded;

	surface->backend->set_paginated_mode (surface->target,
		                              CAIRO_PAGINATED_MODE_FALLBACK);

	is_bounded = _cairo_surface_get_extents (surface->target, &extents);
	if (! is_bounded) {
	    status = CAIRO_INT_STATUS_UNSUPPORTED;
	    goto FAIL;
	}

	status = _paint_fallback_image (surface, &extents);
	if (unlikely (status))
	    goto FAIL;
    }

    if (has_finegrained_fallback) {
        cairo_region_t *region;
        int num_rects, i;

	surface->backend->set_paginated_mode (surface->target,
		                              CAIRO_PAGINATED_MODE_FALLBACK);

	region = _cairo_analysis_surface_get_unsupported (analysis);

	num_rects = cairo_region_num_rectangles (region);
	for (i = 0; i < num_rects; i++) {
	    cairo_rectangle_int_t rect;

	    cairo_region_get_rectangle (region, i, &rect);
	    status = _paint_fallback_image (surface, &rect);
	    if (unlikely (status))
		goto FAIL;
	}
    }

  FAIL:
    cairo_surface_destroy (analysis);

    return _cairo_surface_set_error (surface->target, status);
}

static cairo_status_t
_start_page (cairo_paginated_surface_t *surface)
{
    if (surface->target->status)
	return surface->target->status;

    if (! surface->backend->start_page)
	return CAIRO_STATUS_SUCCESS;

    return _cairo_surface_set_error (surface->target,
	                        surface->backend->start_page (surface->target));
}

static cairo_int_status_t
_cairo_paginated_surface_copy_page (void *abstract_surface)
{
    cairo_status_t status;
    cairo_paginated_surface_t *surface = abstract_surface;

    status = _start_page (surface);
    if (unlikely (status))
	return status;

    status = _paint_page (surface);
    if (unlikely (status))
	return status;

    surface->page_num++;

    /* XXX: It might make sense to add some support here for calling
     * cairo_surface_copy_page on the target surface. It would be an
     * optimization for the output, but the interaction with image
     * fallbacks gets tricky. For now, we just let the target see a
     * show_page and we implement the copying by simply not destroying
     * the recording-surface. */

    cairo_surface_show_page (surface->target);
    return cairo_surface_status (surface->target);
}

static cairo_int_status_t
_cairo_paginated_surface_show_page (void *abstract_surface)
{
    cairo_status_t status;
    cairo_paginated_surface_t *surface = abstract_surface;

    status = _start_page (surface);
    if (unlikely (status))
	return status;

    status = _paint_page (surface);
    if (unlikely (status))
	return status;

    cairo_surface_show_page (surface->target);
    status = surface->target->status;
    if (unlikely (status))
	return status;

    status = surface->recording_surface->status;
    if (unlikely (status))
	return status;

    if (! surface->base.finished) {
	cairo_surface_destroy (surface->recording_surface);

	surface->recording_surface = _create_recording_surface_for_target (surface->target,
									   surface->content);
	status = surface->recording_surface->status;
	if (unlikely (status))
	    return status;

	surface->page_num++;
	surface->base.is_clear = TRUE;
    }

    return CAIRO_STATUS_SUCCESS;
}

static cairo_bool_t
_cairo_paginated_surface_get_extents (void	              *abstract_surface,
				      cairo_rectangle_int_t   *rectangle)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_get_extents (surface->target, rectangle);
}

static void
_cairo_paginated_surface_get_font_options (void                  *abstract_surface,
					   cairo_font_options_t  *options)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    cairo_surface_get_font_options (surface->target, options);
}

static cairo_int_status_t
_cairo_paginated_surface_paint (void			*abstract_surface,
				cairo_operator_t	 op,
				const cairo_pattern_t	*source,
				cairo_clip_t		*clip)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_paint (surface->recording_surface, op, source, clip);
}

static cairo_int_status_t
_cairo_paginated_surface_mask (void		*abstract_surface,
			       cairo_operator_t	 op,
			       const cairo_pattern_t	*source,
			       const cairo_pattern_t	*mask,
			       cairo_clip_t		*clip)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_mask (surface->recording_surface, op, source, mask, clip);
}

static cairo_int_status_t
_cairo_paginated_surface_stroke (void			*abstract_surface,
				 cairo_operator_t	 op,
				 const cairo_pattern_t	*source,
				 cairo_path_fixed_t	*path,
				 const cairo_stroke_style_t	*style,
				 const cairo_matrix_t		*ctm,
				 const cairo_matrix_t		*ctm_inverse,
				 double			 tolerance,
				 cairo_antialias_t	 antialias,
				 cairo_clip_t		*clip)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_stroke (surface->recording_surface, op, source,
				  path, style,
				  ctm, ctm_inverse,
				  tolerance, antialias,
				  clip);
}

static cairo_int_status_t
_cairo_paginated_surface_fill (void			*abstract_surface,
			       cairo_operator_t		 op,
			       const cairo_pattern_t	*source,
			       cairo_path_fixed_t	*path,
			       cairo_fill_rule_t	 fill_rule,
			       double			 tolerance,
			       cairo_antialias_t	 antialias,
			       cairo_clip_t		*clip)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_fill (surface->recording_surface, op, source,
				path, fill_rule,
				tolerance, antialias,
				clip);
}

static cairo_bool_t
_cairo_paginated_surface_has_show_text_glyphs (void *abstract_surface)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return cairo_surface_has_show_text_glyphs (surface->target);
}

static cairo_int_status_t
_cairo_paginated_surface_show_text_glyphs (void			      *abstract_surface,
					   cairo_operator_t	       op,
					   const cairo_pattern_t      *source,
					   const char		      *utf8,
					   int			       utf8_len,
					   cairo_glyph_t	      *glyphs,
					   int			       num_glyphs,
					   const cairo_text_cluster_t *clusters,
					   int			       num_clusters,
					   cairo_text_cluster_flags_t  cluster_flags,
					   cairo_scaled_font_t	      *scaled_font,
					   cairo_clip_t		      *clip)
{
    cairo_paginated_surface_t *surface = abstract_surface;

    return _cairo_surface_show_text_glyphs (surface->recording_surface, op, source,
					    utf8, utf8_len,
					    glyphs, num_glyphs,
					    clusters, num_clusters,
					    cluster_flags,
					    scaled_font,
					    clip);
}

static cairo_surface_t *
_cairo_paginated_surface_snapshot (void *abstract_other)
{
    cairo_paginated_surface_t *other = abstract_other;

    return _cairo_surface_snapshot (other->recording_surface);
}

static const cairo_surface_backend_t cairo_paginated_surface_backend = {
    CAIRO_INTERNAL_SURFACE_TYPE_PAGINATED,
    _cairo_paginated_surface_create_similar,
    _cairo_paginated_surface_finish,
    _cairo_paginated_surface_acquire_source_image,
    _cairo_paginated_surface_release_source_image,
    NULL, /* acquire_dest_image */
    NULL, /* release_dest_image */
    NULL, /* clone_similar */
    NULL, /* composite */
    NULL, /* fill_rectangles */
    NULL, /* composite_trapezoids */
    NULL, /* create_span_renderer */
    NULL, /* check_span_renderer */
    _cairo_paginated_surface_copy_page,
    _cairo_paginated_surface_show_page,
    _cairo_paginated_surface_get_extents,
    NULL, /* old_show_glyphs */
    _cairo_paginated_surface_get_font_options,
    NULL, /* flush */
    NULL, /* mark_dirty_rectangle */
    NULL, /* scaled_font_fini */
    NULL, /* scaled_glyph_fini */
    _cairo_paginated_surface_paint,
    _cairo_paginated_surface_mask,
    _cairo_paginated_surface_stroke,
    _cairo_paginated_surface_fill,
    NULL, /* show_glyphs */
    _cairo_paginated_surface_snapshot,
    NULL, /* is_similar */
    NULL, /* fill_stroke */
    NULL, /* create_solid_pattern_surface */
    NULL, /* can_repaint_solid_pattern_surface */
    _cairo_paginated_surface_has_show_text_glyphs,
    _cairo_paginated_surface_show_text_glyphs
};