/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */

/* 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):

 *  Kristian Høgsberg <krh@redhat.com>

 *  Carl Worth <cworth@cworth.org>

 *  Adrian Johnson <ajohnson@redneon.com>

 */

/**

 * SECTION:cairo-recording

 * @Title: Recording Surfaces

 * @Short_Description: Records all drawing operations

 * @See_Also: #cairo_surface_t

 *

 * A recording surface is a surface that records all drawing operations at

 * the highest level of the surface backend interface, (that is, the

 * level of paint, mask, stroke, fill, and show_text_glyphs). The recording

 * surface can then be "replayed" against any target surface by using it

 * as a source surface.

 *

 * If you want to replay a surface so that the results in target will be

 * identical to the results that would have been obtained if the original

 * operations applied to the recording surface had instead been applied to the

 * target surface, you can use code like this:

 * <informalexample><programlisting>

 * cairo_t *cr;

 *

 * cr = cairo_create (target);

 * cairo_set_source_surface (cr, recording_surface, 0.0, 0.0);

 * cairo_paint (cr);

 * cairo_destroy (cr);

 * </programlisting></informalexample>

 *

 * A recording surface is logically unbounded, i.e. it has no implicit constraint

 * on the size of the drawing surface. However, in practice this is rarely

 * useful as you wish to replay against a particular target surface with

 * known bounds. For this case, it is more efficient to specify the target

 * extents to the recording surface upon creation.

 *

 * The recording phase of the recording surface is careful to snapshot all

 * necessary objects (paths, patterns, etc.), in order to achieve

 * accurate replay. The efficiency of the recording surface could be

 * improved by improving the implementation of snapshot for the

 * various objects. For example, it would be nice to have a

 * copy-on-write implementation for _cairo_surface_snapshot.

 **/

#include "cairoint.h"

#include "cairo-array-private.h"

#include "cairo-analysis-surface-private.h"

#include "cairo-clip-private.h"

#include "cairo-combsort-inline.h"

#include "cairo-composite-rectangles-private.h"

#include "cairo-default-context-private.h"

#include "cairo-error-private.h"

#include "cairo-image-surface-private.h"

#include "cairo-list-inline.h"

#include "cairo-recording-surface-inline.h"

#include "cairo-surface-snapshot-inline.h"

#include "cairo-surface-wrapper-private.h"

#include "cairo-traps-private.h"

typedef struct _cairo_recording_surface_replay_params {

    const cairo_rectangle_int_t *surface_extents;

    const cairo_matrix_t *surface_transform;

    cairo_surface_t      *target;

    const cairo_clip_t *target_clip;

    cairo_bool_t surface_is_unbounded;

    cairo_recording_replay_type_t type;

    cairo_recording_region_type_t region;

    unsigned int regions_id;

    const cairo_color_t *foreground_color;

    cairo_bool_t foreground_used;

    cairo_bool_t replay_all;

} cairo_recording_surface_replay_params_t;

static const cairo_surface_backend_t cairo_recording_surface_backend;

/**

 * CAIRO_HAS_RECORDING_SURFACE:

 *

 * Defined if the recording surface backend is available.

 * The recording surface backend is always built in.

 * This macro was added for completeness in cairo 1.10.

 *

 * Since: 1.10

 **/

/* Currently all recording surfaces do have a size which should be passed

 * in as the maximum size of any target surface against which the

 * recording-surface will ever be replayed.

 *

 * XXX: The naming of "pixels" in the size here is a misnomer. It's

 * actually a size in whatever device-space units are desired (again,

 * according to the intended replay target).

 */

static int bbtree_left_or_right (struct bbtree *bbt,

         const cairo_box_t *box)

{

    int left, right;

    if (bbt->left) {

  cairo_box_t *e = &bbt->left->extents;

  cairo_box_t b;

  b.p1.x = MIN (e->p1.x, box->p1.x);

  b.p1.y = MIN (e->p1.y, box->p1.y);

  b.p2.x = MAX (e->p2.x, box->p2.x);

  b.p2.y = MAX (e->p2.y, box->p2.y);

  left = _cairo_fixed_integer_part (b.p2.x - b.p1.x) * _cairo_fixed_integer_part (b.p2.y - b.p1.y);

  left -= _cairo_fixed_integer_part (e->p2.x - e->p1.x) * _cairo_fixed_integer_part (e->p2.y - e->p1.y);

    } else

  left = 0;

    if (bbt->right) {

  cairo_box_t *e = &bbt->right->extents;

  cairo_box_t b;

  b.p1.x = MIN (e->p1.x, box->p1.x);

  b.p1.y = MIN (e->p1.y, box->p1.y);

  b.p2.x = MAX (e->p2.x, box->p2.x);

  b.p2.y = MAX (e->p2.y, box->p2.y);

  right = _cairo_fixed_integer_part (b.p2.x - b.p1.x) * _cairo_fixed_integer_part (b.p2.y - b.p1.y);

  right -= _cairo_fixed_integer_part (e->p2.x - e->p1.x) * _cairo_fixed_integer_part (e->p2.y - e->p1.y);

    } else

  right = 0;

    return left <= right;

}

#define INVALID_CHAIN ((cairo_command_header_t *)-1)

static struct bbtree *

bbtree_new (const cairo_box_t *box, cairo_command_header_t *chain)

{

    struct bbtree *bbt = _cairo_calloc (sizeof (*bbt));

    if (bbt == NULL)

  return NULL;

    bbt->extents = *box;

    bbt->left = bbt->right = NULL;

    bbt->chain = chain;

    return bbt;

}

static void

bbtree_init (struct bbtree *bbt, cairo_command_header_t *header)

{

    _cairo_box_from_rectangle (&bbt->extents, &header->extents);

    bbt->chain = header;

}

static cairo_status_t

bbtree_add (struct bbtree *bbt,

      cairo_command_header_t *header,

      const cairo_box_t *box)

{

    if (box->p1.x < bbt->extents.p1.x || box->p1.y < bbt->extents.p1.y ||

  box->p2.x > bbt->extents.p2.x || box->p2.y > bbt->extents.p2.y)

    {

  if (bbt->chain) {

      if (bbtree_left_or_right (bbt, &bbt->extents)) {

    if (bbt->left == NULL) {

        bbt->left = bbtree_new (&bbt->extents, bbt->chain);

        if (unlikely (bbt->left == NULL))

      return _cairo_error (CAIRO_STATUS_NO_MEMORY);

    } else

        bbtree_add (bbt->left, bbt->chain, &bbt->extents);

      } else {

    if (bbt->right == NULL) {

        bbt->right = bbtree_new (&bbt->extents, bbt->chain);

        if (unlikely (bbt->right == NULL))

      return _cairo_error (CAIRO_STATUS_NO_MEMORY);

    } else

        bbtree_add (bbt->right, bbt->chain, &bbt->extents);

      }

      bbt->chain = NULL;

  }

  bbt->extents.p1.x = MIN (bbt->extents.p1.x, box->p1.x);

  bbt->extents.p1.y = MIN (bbt->extents.p1.y, box->p1.y);

  bbt->extents.p2.x = MAX (bbt->extents.p2.x, box->p2.x);

  bbt->extents.p2.y = MAX (bbt->extents.p2.y, box->p2.y);

    }

    if (box->p1.x == bbt->extents.p1.x && box->p1.y == bbt->extents.p1.y &&

  box->p2.x == bbt->extents.p2.x && box->p2.y == bbt->extents.p2.y)

    {

  cairo_command_header_t *last = header;

  while (last->chain) /* expected to be infrequent */

      last = last->chain;

  last->chain = bbt->chain;

  bbt->chain = header;

  return CAIRO_STATUS_SUCCESS;

    }

    if (bbtree_left_or_right (bbt, box)) {

  if (bbt->left == NULL) {

      bbt->left = bbtree_new (box, header);

      if (unlikely (bbt->left == NULL))

    return _cairo_error (CAIRO_STATUS_NO_MEMORY);

  } else

      return bbtree_add (bbt->left, header, box);

    } else {

  if (bbt->right == NULL) {

      bbt->right = bbtree_new (box, header);

      if (unlikely (bbt->right == NULL))

    return _cairo_error (CAIRO_STATUS_NO_MEMORY);

  } else

      return bbtree_add (bbt->right, header, box);

    }

    return CAIRO_STATUS_SUCCESS;

}

static void bbtree_del (struct bbtree *bbt)

{

    if (bbt->left)

  bbtree_del (bbt->left);

    if (bbt->right)

  bbtree_del (bbt->right);

    free (bbt);

}

static cairo_bool_t box_outside (const cairo_box_t *a, const cairo_box_t *b)

{

    return

  a->p1.x >= b->p2.x || a->p1.y >= b->p2.y ||

  a->p2.x <= b->p1.x || a->p2.y <= b->p1.y;

}

static void

bbtree_foreach_mark_visible (struct bbtree *bbt,

           const cairo_box_t *box,

           unsigned int **indices)

{

    cairo_command_header_t *chain;

    for (chain = bbt->chain; chain; chain = chain->chain)

  *(*indices)++ = chain->index;

    if (bbt->left && ! box_outside (box, &bbt->left->extents))

  bbtree_foreach_mark_visible (bbt->left, box, indices);

    if (bbt->right && ! box_outside (box, &bbt->right->extents))

  bbtree_foreach_mark_visible (bbt->right, box, indices);

}

static inline int intcmp (const unsigned int a, const unsigned int b)

{

    return a - b;

}

CAIRO_COMBSORT_DECLARE (sort_indices, unsigned int, intcmp)

static inline int sizecmp (unsigned int a, unsigned int b, cairo_command_header_t **elements)

{

    const cairo_rectangle_int_t *r;

    r = &elements[a]->extents;

    a = r->width * r->height;

    r = &elements[b]->extents;

    b = r->width * r->height;

    return b - a;

}

CAIRO_COMBSORT_DECLARE_WITH_DATA (sort_commands, unsigned int, sizecmp)

static void

_cairo_recording_surface_destroy_bbtree (cairo_recording_surface_t *surface)

{

    cairo_command_t **elements;

    int i, num_elements;

    if (surface->bbtree.chain == INVALID_CHAIN)

  return;

    if (surface->bbtree.left) {

  bbtree_del (surface->bbtree.left);

  surface->bbtree.left = NULL;

    }

    if (surface->bbtree.right) {

  bbtree_del (surface->bbtree.right);

  surface->bbtree.right = NULL;

    }

    elements = _cairo_array_index (&surface->commands, 0);

    num_elements = surface->commands.num_elements;

    for (i = 0; i < num_elements; i++)

  elements[i]->header.chain = NULL;

    surface->bbtree.chain = INVALID_CHAIN;

}

static cairo_status_t

_cairo_recording_surface_create_bbtree (cairo_recording_surface_t *surface)

{

    cairo_command_t **elements = _cairo_array_index (&surface->commands, 0);

    unsigned int *indices;

    cairo_status_t status;

    unsigned int i, count;

    count = surface->commands.num_elements;

    if (count > surface->num_indices) {

  free (surface->indices);

  surface->indices = _cairo_malloc_ab (count, sizeof (int));

  if (unlikely (surface->indices == NULL))

      return _cairo_error (CAIRO_STATUS_NO_MEMORY);

  surface->num_indices = count;

    }

    indices = surface->indices;

    for (i = 0; i < count; i++)

  indices[i] = i;

    sort_commands (indices, count, elements);

    bbtree_init (&surface->bbtree, &elements[indices[0]]->header);

    for (i = 1; i < count; i++) {

  cairo_command_header_t *header = &elements[indices[i]]->header;

  cairo_box_t box;

  _cairo_box_from_rectangle (&box, &header->extents);

  status = bbtree_add (&surface->bbtree, header, &box);

  if (unlikely (status))

      goto cleanup;

    }

    return CAIRO_STATUS_SUCCESS;

cleanup:

    if (surface->bbtree.left)

  bbtree_del (surface->bbtree.left);

    if (surface->bbtree.right)

  bbtree_del (surface->bbtree.right);

    return status;

}

/**

 * cairo_recording_surface_create:

 * @content: the content of the recording surface

 * @extents: the extents to record in pixels, can be %NULL to record

 *           unbounded operations.

 *

 * Creates a recording-surface which can be used to record all drawing operations

 * at the highest level (that is, the level of paint, mask, stroke, fill

 * and show_text_glyphs). The recording surface can then be "replayed" against

 * any target surface by using it as a source to drawing operations.

 *

 * The recording phase of the recording surface is careful to snapshot all

 * necessary objects (paths, patterns, etc.), in order to achieve

 * accurate replay.

 *

 * Return value: a pointer to the newly created surface. The caller

 * owns the surface and should call cairo_surface_destroy() when done

 * with it.

 *

 * Since: 1.10

 **/

cairo_surface_t *

cairo_recording_surface_create (cairo_content_t    content,

        const cairo_rectangle_t *extents)

{

    cairo_recording_surface_t *surface;

    surface = _cairo_calloc (sizeof (cairo_recording_surface_t));

    if (unlikely (surface == NULL))

  return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));

    _cairo_surface_init (&surface->base,

       &cairo_recording_surface_backend,

       NULL, /* device */

       content,

       TRUE); /* is_vector */

    surface->unbounded = TRUE;

    /* unbounded -> 'infinite' extents */

    if (extents != NULL) {

  surface->extents_pixels = *extents;

  /* XXX check for overflow */

  surface->extents.x = floor (extents->x);

  surface->extents.y = floor (extents->y);

  surface->extents.width = ceil (extents->x + extents->width) - surface->extents.x;

  surface->extents.height = ceil (extents->y + extents->height) - surface->extents.y;

  surface->unbounded = FALSE;

    }

    _cairo_array_init (&surface->commands, sizeof (cairo_command_t *));

    surface->base.is_clear = TRUE;

    surface->bbtree.left = surface->bbtree.right = NULL;

    surface->bbtree.chain = INVALID_CHAIN;

    surface->indices = NULL;

    surface->num_indices = 0;

    surface->optimize_clears = TRUE;

    surface->has_bilevel_alpha = FALSE;

    surface->has_only_op_over = FALSE;

    surface->has_tags = FALSE;

    CAIRO_MUTEX_INIT (surface->mutex);

    cairo_list_init (&surface->region_array_list);

    return &surface->base;

}

static cairo_surface_t *

_cairo_recording_surface_create_similar (void          *abstract_surface,

           cairo_content_t  content,

           int      width,

           int      height)

{

    cairo_rectangle_t extents;

    extents.x = extents.y = 0;

    extents.width = width;

    extents.height = height;

    return cairo_recording_surface_create (content, &extents);

}

static void

destroy_pattern_region_array (const cairo_pattern_t *pattern,

            unsigned int region_id)

{

    if (region_id != 0) {

  if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {

      cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern;

      if (_cairo_surface_is_recording (surface_pattern->surface))

    _cairo_recording_surface_region_array_remove (surface_pattern->surface, region_id);

  }

    }

}

static void

_cairo_recording_surface_region_array_destroy (cairo_recording_surface_t       *surface,

                 cairo_recording_regions_array_t *region_array)

{

    cairo_command_t **elements;

    cairo_recording_region_element_t *region_elements;

    int i, num_elements;

    num_elements = MIN(surface->commands.num_elements, _cairo_array_num_elements(&region_array->regions));

    elements = _cairo_array_index (&surface->commands, 0);

    region_elements = _cairo_array_index (&region_array->regions, 0);

    for (i = 0; i < num_elements; i++) {

  cairo_command_t *command = elements[i];

  cairo_recording_region_element_t *region_element = &region_elements[i];

  switch (command->header.type) {

      case CAIRO_COMMAND_PAINT:

    destroy_pattern_region_array (&command->paint.source.base, region_element->source_id);

    break;

      case CAIRO_COMMAND_MASK:

    destroy_pattern_region_array (&command->mask.source.base, region_element->source_id);

    destroy_pattern_region_array (&command->mask.mask.base, region_element->mask_id);

    break;

      case CAIRO_COMMAND_STROKE:

    destroy_pattern_region_array (&command->stroke.source.base, region_element->source_id);

    break;

      case CAIRO_COMMAND_FILL:

    destroy_pattern_region_array (&command->fill.source.base, region_element->source_id);

    break;

      case CAIRO_COMMAND_SHOW_TEXT_GLYPHS:

    destroy_pattern_region_array (&command->show_text_glyphs.source.base, region_element->source_id);

    break;

      case CAIRO_COMMAND_TAG:

    break;

      default:

    ASSERT_NOT_REACHED;

  }

    }

    _cairo_array_fini (&region_array->regions);

    free (region_array);

}

static void

_cairo_recording_surface_reset (cairo_recording_surface_t *surface)

{

    cairo_command_t **elements;

    int i, num_elements;

    cairo_recording_regions_array_t *region_array, *region_next;

    /* Normally backend surfaces hold a reference to the surface as

     * well as the region and free the region before the surface. So

     * the regions should already be freed at this point but just in

     * case we ensure the regions are freed before destroying the

     * surface. */

    cairo_list_foreach_entry_safe (region_array, region_next,

           cairo_recording_regions_array_t,

           &surface->region_array_list, link)

    {

  cairo_list_del (&region_array->link);

  _cairo_recording_surface_region_array_destroy (surface, region_array);

    }

    num_elements = surface->commands.num_elements;

    elements = _cairo_array_index (&surface->commands, 0);

    for (i = 0; i < num_elements; i++) {

  cairo_command_t *command = elements[i];

  switch (command->header.type) {

  case CAIRO_COMMAND_PAINT:

      _cairo_pattern_fini (&command->paint.source.base);

      break;

  case CAIRO_COMMAND_MASK:

      _cairo_pattern_fini (&command->mask.source.base);

      _cairo_pattern_fini (&command->mask.mask.base);

      break;

  case CAIRO_COMMAND_STROKE:

      _cairo_pattern_fini (&command->stroke.source.base);

      _cairo_path_fixed_fini (&command->stroke.path);

      _cairo_stroke_style_fini (&command->stroke.style);

      break;

  case CAIRO_COMMAND_FILL:

      _cairo_pattern_fini (&command->fill.source.base);

      _cairo_path_fixed_fini (&command->fill.path);

      break;

  case CAIRO_COMMAND_SHOW_TEXT_GLYPHS:

      _cairo_pattern_fini (&command->show_text_glyphs.source.base);

      free (command->show_text_glyphs.utf8);

      free (command->show_text_glyphs.glyphs);

      free (command->show_text_glyphs.clusters);

      cairo_scaled_font_destroy (command->show_text_glyphs.scaled_font);

      break;

  case CAIRO_COMMAND_TAG:

      free (command->tag.tag_name);

      if (command->tag.begin) {

    free (command->tag.attributes);

      }

      break;

      default:

      ASSERT_NOT_REACHED;

  }

  _cairo_clip_destroy (command->header.clip);

  free (command);

    }

    _cairo_array_fini (&surface->commands);

    _cairo_array_init (&surface->commands, sizeof (cairo_command_t *));

    if (surface->bbtree.left)

  bbtree_del (surface->bbtree.left);

    if (surface->bbtree.right)

  bbtree_del (surface->bbtree.right);

    surface->bbtree.left = surface->bbtree.right = NULL;

    surface->bbtree.chain = INVALID_CHAIN;

    free (surface->indices);

    surface->indices = NULL;

    surface->num_indices = 0;

}

static cairo_status_t

_cairo_recording_surface_finish (void *abstract_surface)

{

    cairo_recording_surface_t *surface = abstract_surface;

    _cairo_recording_surface_reset (surface);

    CAIRO_MUTEX_FINI (surface->mutex);

    return CAIRO_STATUS_SUCCESS;

}

struct proxy {

    cairo_surface_t base;

    cairo_surface_t *image;

};

static cairo_status_t

proxy_acquire_source_image (void       *abstract_surface,

          cairo_image_surface_t **image_out,

          void      **image_extra)

{

    struct proxy *proxy = abstract_surface;

    return _cairo_surface_acquire_source_image (proxy->image, image_out, image_extra);

}

static void

proxy_release_source_image (void      *abstract_surface,

          cairo_image_surface_t *image,

          void      *image_extra)

{

    struct proxy *proxy = abstract_surface;

    _cairo_surface_release_source_image (proxy->image, image, image_extra);

}

static cairo_status_t

proxy_finish (void *abstract_surface)

{

    return CAIRO_STATUS_SUCCESS;

}

static const cairo_surface_backend_t proxy_backend  = {

    CAIRO_INTERNAL_SURFACE_TYPE_NULL,

    proxy_finish,

    NULL,

    NULL, /* create similar */

    NULL, /* create similar image */

    NULL, /* map to image */

    NULL, /* unmap image */

    _cairo_surface_default_source,

    proxy_acquire_source_image,

    proxy_release_source_image,

};

static cairo_surface_t *

attach_proxy (cairo_surface_t *source,

        cairo_surface_t *image)

{

    struct proxy *proxy;

    proxy = _cairo_calloc (sizeof (*proxy));

    if (unlikely (proxy == NULL))

  return _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);

    _cairo_surface_init (&proxy->base, &proxy_backend, NULL, image->content, FALSE);

    proxy->image = image;

    _cairo_surface_attach_snapshot (source, &proxy->base, NULL);

    return &proxy->base;

}

static void

detach_proxy (cairo_surface_t *source,

        cairo_surface_t *proxy)

{

    cairo_surface_finish (proxy);

    cairo_surface_destroy (proxy);

}

static cairo_surface_t *

get_proxy (cairo_surface_t *proxy)

{

    return ((struct proxy *)proxy)->image;

}

static cairo_status_t

_cairo_recording_surface_acquire_source_image (void      *abstract_surface,

                 cairo_image_surface_t  **image_out,

                 void     **image_extra)

{

    cairo_recording_surface_t *surface = abstract_surface;

    cairo_surface_t *image, *proxy;

    cairo_status_t status;

    proxy = _cairo_surface_has_snapshot (abstract_surface, &proxy_backend);

    if (proxy != NULL) {

  *image_out = (cairo_image_surface_t *)

      cairo_surface_reference (get_proxy (proxy));

  *image_extra = NULL;

  return CAIRO_STATUS_SUCCESS;

    }

    if (surface->unbounded)

  return CAIRO_INT_STATUS_UNSUPPORTED;

    image = _cairo_image_surface_create_with_content (surface->base.content,

                  surface->extents.width,

                  surface->extents.height);

    cairo_surface_set_device_offset (image, -surface->extents.x, -surface->extents.y);

    if (unlikely (image->status))

  return image->status;

    cairo_surface_set_device_offset(image, -surface->extents.x, -surface->extents.y);

    /* Handle recursion by returning future reads from the current image */

    proxy = attach_proxy (abstract_surface, image);

    status = _cairo_recording_surface_replay (&surface->base, image);

    detach_proxy (abstract_surface, proxy);

    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_recording_surface_release_source_image (void     *abstract_surface,

                 cairo_image_surface_t  *image,

                 void     *image_extra)

{

    cairo_surface_destroy (&image->base);

}

static cairo_status_t

_command_init (cairo_recording_surface_t *surface,

         cairo_command_header_t *command,

         cairo_command_type_t type,

         cairo_operator_t op,

         cairo_composite_rectangles_t *composite)

{

    cairo_status_t status = CAIRO_STATUS_SUCCESS;

    command->type = type;

    command->op = op;

    command->extents = composite ? composite->unbounded : _cairo_empty_rectangle;

    command->chain = NULL;

    command->index = surface->commands.num_elements;

    /* steal the clip */

    command->clip = NULL;

    if (composite && ! _cairo_composite_rectangles_can_reduce_clip (composite,

                    composite->clip))

    {

  command->clip = composite->clip;

  composite->clip = NULL;

    }

    return status;

}

static void

_cairo_recording_surface_break_self_copy_loop (cairo_recording_surface_t *surface)

{

    cairo_surface_flush (&surface->base);

}

static cairo_status_t

_cairo_recording_surface_commit (cairo_recording_surface_t *surface,

         cairo_command_header_t *command)

{

    _cairo_recording_surface_break_self_copy_loop (surface);

    return _cairo_array_append (&surface->commands, &command);

}

static cairo_int_status_t

_cairo_recording_surface_paint (void        *abstract_surface,

        cairo_operator_t     op,

        const cairo_pattern_t   *source,

        const cairo_clip_t    *clip)

{

    cairo_status_t status;

    cairo_recording_surface_t *surface = abstract_surface;

    cairo_command_paint_t *command;

    cairo_composite_rectangles_t composite;

    TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id));

    if (op == CAIRO_OPERATOR_CLEAR && clip == NULL) {

  if (surface->optimize_clears) {

      _cairo_recording_surface_reset (surface);

      return CAIRO_STATUS_SUCCESS;

  }

    }

    if (clip == NULL && surface->optimize_clears &&

  (op == CAIRO_OPERATOR_SOURCE ||

   (op == CAIRO_OPERATOR_OVER &&

    (surface->base.is_clear || _cairo_pattern_is_opaque_solid (source)))))

    {

  _cairo_recording_surface_reset (surface);

    }

    status = _cairo_composite_rectangles_init_for_paint (&composite,

               &surface->base,

               op, source,

               clip);

    if (unlikely (status))

  return status;

    command = _cairo_calloc (sizeof (cairo_command_paint_t));

    if (unlikely (command == NULL)) {

  status = _cairo_error (CAIRO_STATUS_NO_MEMORY);

  goto CLEANUP_COMPOSITE;

    }

    status = _command_init (surface,

          &command->header, CAIRO_COMMAND_PAINT, op,

          &composite);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_pattern_init_snapshot (&command->source.base, source);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_recording_surface_commit (surface, &command->header);

    if (unlikely (status))

  goto CLEANUP_SOURCE;

    _cairo_recording_surface_destroy_bbtree (surface);

    _cairo_composite_rectangles_fini (&composite);

    return CAIRO_STATUS_SUCCESS;

  CLEANUP_SOURCE:

    _cairo_pattern_fini (&command->source.base);

  CLEANUP_COMMAND:

    _cairo_clip_destroy (command->header.clip);

    free (command);

CLEANUP_COMPOSITE:

    _cairo_composite_rectangles_fini (&composite);

    return status;

}

static cairo_int_status_t

_cairo_recording_surface_mask (void     *abstract_surface,

             cairo_operator_t    op,

             const cairo_pattern_t  *source,

             const cairo_pattern_t  *mask,

             const cairo_clip_t *clip)

{

    cairo_status_t status;

    cairo_recording_surface_t *surface = abstract_surface;

    cairo_command_mask_t *command;

    cairo_composite_rectangles_t composite;

    TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id));

    status = _cairo_composite_rectangles_init_for_mask (&composite,

              &surface->base,

              op, source, mask,

              clip);

    if (unlikely (status))

  return status;

    command = _cairo_calloc (sizeof (cairo_command_mask_t));

    if (unlikely (command == NULL)) {

  status = _cairo_error (CAIRO_STATUS_NO_MEMORY);

  goto CLEANUP_COMPOSITE;

    }

    status = _command_init (surface,

          &command->header, CAIRO_COMMAND_MASK, op,

          &composite);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_pattern_init_snapshot (&command->source.base, source);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_pattern_init_snapshot (&command->mask.base, mask);

    if (unlikely (status))

  goto CLEANUP_SOURCE;

    status = _cairo_recording_surface_commit (surface, &command->header);

    if (unlikely (status))

  goto CLEANUP_MASK;

    _cairo_recording_surface_destroy_bbtree (surface);

    _cairo_composite_rectangles_fini (&composite);

    return CAIRO_STATUS_SUCCESS;

  CLEANUP_MASK:

    _cairo_pattern_fini (&command->mask.base);

  CLEANUP_SOURCE:

    _cairo_pattern_fini (&command->source.base);

  CLEANUP_COMMAND:

    _cairo_clip_destroy (command->header.clip);

    free (command);

CLEANUP_COMPOSITE:

    _cairo_composite_rectangles_fini (&composite);

    return status;

}

static cairo_int_status_t

_cairo_recording_surface_stroke (void     *abstract_surface,

         cairo_operator_t  op,

         const cairo_pattern_t  *source,

         const 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,

         const cairo_clip_t *clip)

{

    cairo_status_t status;

    cairo_recording_surface_t *surface = abstract_surface;

    cairo_command_stroke_t *command;

    cairo_composite_rectangles_t composite;

    TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id));

    status = _cairo_composite_rectangles_init_for_stroke (&composite,

                &surface->base,

                op, source,

                path, style, ctm,

                clip);

    if (unlikely (status))

  return status;

    command = _cairo_calloc (sizeof (cairo_command_stroke_t));

    if (unlikely (command == NULL)) {

  status = _cairo_error (CAIRO_STATUS_NO_MEMORY);

  goto CLEANUP_COMPOSITE;

    }

    status = _command_init (surface,

          &command->header, CAIRO_COMMAND_STROKE, op,

          &composite);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_pattern_init_snapshot (&command->source.base, source);

    if (unlikely (status))

  goto CLEANUP_COMMAND;

    status = _cairo_path_fixed_init_copy (&command->path, path);

    if (unlikely (status))

  goto CLEANUP_SOURCE;

    status = _cairo_stroke_style_init_copy (&command->style, style);

    if (unlikely (status))

  goto CLEANUP_PATH;

    command->ctm = *ctm;

    command->ctm_inverse = *ctm_inverse;

    command->tolerance = tolerance;

    command->antialias = antialias;

    status = _cairo_recording_surface_commit (surface, &command->header);

    if (unlikely (status))

  goto CLEANUP_STYLE;

    _cairo_recording_surface_destroy_bbtree (surface);

    _cairo_composite_rectangles_fini (&composite);

    return CAIRO_STATUS_SUCCESS;

  CLEANUP_STYLE: