diff options
Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-recording-surface.c')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-recording-surface.c | 2357 |
1 files changed, 2357 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-recording-surface.c b/libs/cairo-1.16.0/src/cairo-recording-surface.c new file mode 100644 index 0000000..6df8b08 --- /dev/null +++ b/libs/cairo-1.16.0/src/cairo-recording-surface.c @@ -0,0 +1,2357 @@ +/* -*- 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-recording-surface-inline.h" +#include "cairo-surface-snapshot-inline.h" +#include "cairo-surface-wrapper-private.h" +#include "cairo-traps-private.h" + +typedef enum { + CAIRO_RECORDING_REPLAY, + CAIRO_RECORDING_CREATE_REGIONS +} cairo_recording_replay_type_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_malloc (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: + bbtree_del (&surface->bbtree); + 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_malloc (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; + + return &surface->base; +} +slim_hidden_def (cairo_recording_surface_create); + +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 cairo_status_t +_cairo_recording_surface_finish (void *abstract_surface) +{ + cairo_recording_surface_t *surface = abstract_surface; + cairo_command_t **elements; + int i, num_elements; + + 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); + _cairo_pattern_fini (&command->tag.source.base); + _cairo_stroke_style_fini (&command->tag.style); + } + break; + + default: + ASSERT_NOT_REACHED; + } + + _cairo_clip_destroy (command->header.clip); + free (command); + } + + _cairo_array_fini (&surface->commands); + + if (surface->bbtree.left) + bbtree_del (surface->bbtree.left); + if (surface->bbtree.right) + bbtree_del (surface->bbtree.right); + + free (surface->indices); + + 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_malloc (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; + } + + assert (! surface->unbounded); + image = _cairo_image_surface_create_with_content (surface->base.content, + surface->extents.width, + surface->extents.height); + if (unlikely (image->status)) + return image->status; + + /* 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->region = CAIRO_RECORDING_REGION_ALL; + + command->extents = composite->unbounded; + command->chain = NULL; + command->index = surface->commands.num_elements; + + /* steal the clip */ + command->clip = NULL; + if (! _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 void +_cairo_recording_surface_reset (cairo_recording_surface_t *surface) +{ + /* Reset the commands and temporaries */ + _cairo_recording_surface_finish (surface); + + surface->bbtree.left = surface->bbtree.right = NULL; + surface->bbtree.chain = INVALID_CHAIN; + + surface->indices = NULL; + surface->num_indices = 0; + + _cairo_array_init (&surface->commands, sizeof (cairo_command_t *)); +} + +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_malloc (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_malloc (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_malloc (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: + _cairo_stroke_style_fini (&command->style); + CLEANUP_PATH: + _cairo_path_fixed_fini (&command->path); + 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_fill (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_path_fixed_t *path, + cairo_fill_rule_t fill_rule, + double tolerance, + cairo_antialias_t antialias, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_recording_surface_t *surface = abstract_surface; + cairo_command_fill_t *command; + cairo_composite_rectangles_t composite; + + TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id)); + + status = _cairo_composite_rectangles_init_for_fill (&composite, + &surface->base, + op, source, path, + clip); + if (unlikely (status)) + return status; + + command = _cairo_malloc (sizeof (cairo_command_fill_t)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_COMPOSITE; + } + + status =_command_init (surface, + &command->header, CAIRO_COMMAND_FILL, 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; + + command->fill_rule = fill_rule; + command->tolerance = tolerance; + command->antialias = antialias; + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto CLEANUP_PATH; + + _cairo_recording_surface_destroy_bbtree (surface); + + _cairo_composite_rectangles_fini (&composite); + return CAIRO_STATUS_SUCCESS; + + CLEANUP_PATH: + _cairo_path_fixed_fini (&command->path); + 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_bool_t +_cairo_recording_surface_has_show_text_glyphs (void *abstract_surface) +{ + return TRUE; +} + +static cairo_int_status_t +_cairo_recording_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, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_recording_surface_t *surface = abstract_surface; + cairo_command_show_text_glyphs_t *command; + cairo_composite_rectangles_t composite; + + TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id)); + + status = _cairo_composite_rectangles_init_for_glyphs (&composite, + &surface->base, + op, source, + scaled_font, + glyphs, num_glyphs, + clip, + NULL); + if (unlikely (status)) + return status; + + command = _cairo_malloc (sizeof (cairo_command_show_text_glyphs_t)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_COMPOSITE; + } + + status = _command_init (surface, + &command->header, CAIRO_COMMAND_SHOW_TEXT_GLYPHS, + op, &composite); + if (unlikely (status)) + goto CLEANUP_COMMAND; + + status = _cairo_pattern_init_snapshot (&command->source.base, source); + if (unlikely (status)) + goto CLEANUP_COMMAND; + + command->utf8 = NULL; + command->utf8_len = utf8_len; + command->glyphs = NULL; + command->num_glyphs = num_glyphs; + command->clusters = NULL; + command->num_clusters = num_clusters; + + if (utf8_len) { + command->utf8 = _cairo_malloc (utf8_len); + if (unlikely (command->utf8 == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_ARRAYS; + } + memcpy (command->utf8, utf8, utf8_len); + } + if (num_glyphs) { + command->glyphs = _cairo_malloc_ab (num_glyphs, sizeof (glyphs[0])); + if (unlikely (command->glyphs == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_ARRAYS; + } + memcpy (command->glyphs, glyphs, sizeof (glyphs[0]) * num_glyphs); + } + if (num_clusters) { + command->clusters = _cairo_malloc_ab (num_clusters, sizeof (clusters[0])); + if (unlikely (command->clusters == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_ARRAYS; + } + memcpy (command->clusters, clusters, sizeof (clusters[0]) * num_clusters); + } + + command->cluster_flags = cluster_flags; + + command->scaled_font = cairo_scaled_font_reference (scaled_font); + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto CLEANUP_SCALED_FONT; + + _cairo_composite_rectangles_fini (&composite); + return CAIRO_STATUS_SUCCESS; + + CLEANUP_SCALED_FONT: + cairo_scaled_font_destroy (command->scaled_font); + CLEANUP_ARRAYS: + free (command->utf8); + free (command->glyphs); + free (command->clusters); + + _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_tag (void *abstract_surface, + cairo_bool_t begin, + const char *tag_name, + const char *attributes, + const cairo_pattern_t *source, + const cairo_stroke_style_t *style, + const cairo_matrix_t *ctm, + const cairo_matrix_t *ctm_inverse, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_recording_surface_t *surface = abstract_surface; + cairo_command_tag_t *command; + cairo_composite_rectangles_t composite; + + TRACE ((stderr, "%s: surface=%d\n", __FUNCTION__, surface->base.unique_id)); + + status = _cairo_composite_rectangles_init_for_paint (&composite, + &surface->base, + CAIRO_OPERATOR_SOURCE, + source ? source : &_cairo_pattern_black.base, + clip); + if (unlikely (status)) + return status; + + command = calloc (1, sizeof (cairo_command_tag_t)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto CLEANUP_COMPOSITE; + } + + status = _command_init (surface, + &command->header, CAIRO_COMMAND_TAG, CAIRO_OPERATOR_SOURCE, + &composite); + if (unlikely (status)) + goto CLEANUP_COMMAND; + + command->begin = begin; + command->tag_name = strdup (tag_name); + if (begin) { + if (attributes) + command->attributes = strdup (attributes); + + status = _cairo_pattern_init_snapshot (&command->source.base, source); + if (unlikely (status)) + goto CLEANUP_STRINGS; + + status = _cairo_stroke_style_init_copy (&command->style, style); + if (unlikely (status)) + goto CLEANUP_SOURCE; + + command->ctm = *ctm; + command->ctm_inverse = *ctm_inverse; + } + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) { + if (begin) + goto CLEANUP_STRINGS; + else + goto CLEANUP_STYLE; + } + + _cairo_recording_surface_destroy_bbtree (surface); + + _cairo_composite_rectangles_fini (&composite); + return CAIRO_STATUS_SUCCESS; + + CLEANUP_STYLE: + _cairo_stroke_style_fini (&command->style); + CLEANUP_SOURCE: + _cairo_pattern_fini (&command->source.base); + CLEANUP_STRINGS: + free (command->tag_name); + free (command->attributes); + CLEANUP_COMMAND: + _cairo_clip_destroy (command->header.clip); + free (command); + CLEANUP_COMPOSITE: + _cairo_composite_rectangles_fini (&composite); + return status; +} + +static void +_command_init_copy (cairo_recording_surface_t *surface, + cairo_command_header_t *dst, + const cairo_command_header_t *src) +{ + dst->type = src->type; + dst->op = src->op; + dst->region = CAIRO_RECORDING_REGION_ALL; + + dst->extents = src->extents; + dst->chain = NULL; + dst->index = surface->commands.num_elements; + + dst->clip = _cairo_clip_copy (src->clip); +} + +static cairo_status_t +_cairo_recording_surface_copy__paint (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_paint_t *command; + cairo_status_t status; + + command = _cairo_malloc (sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->paint.source.base); + if (unlikely (status)) + goto err_command; + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto err_source; + + return CAIRO_STATUS_SUCCESS; + +err_source: + _cairo_pattern_fini (&command->source.base); +err_command: + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy__mask (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_mask_t *command; + cairo_status_t status; + + command = _cairo_malloc (sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->mask.source.base); + if (unlikely (status)) + goto err_command; + + status = _cairo_pattern_init_copy (&command->mask.base, + &src->mask.mask.base); + if (unlikely (status)) + goto err_source; + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto err_mask; + + return CAIRO_STATUS_SUCCESS; + +err_mask: + _cairo_pattern_fini (&command->mask.base); +err_source: + _cairo_pattern_fini (&command->source.base); +err_command: + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy__stroke (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_stroke_t *command; + cairo_status_t status; + + command = _cairo_malloc (sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->stroke.source.base); + if (unlikely (status)) + goto err_command; + + status = _cairo_path_fixed_init_copy (&command->path, &src->stroke.path); + if (unlikely (status)) + goto err_source; + + status = _cairo_stroke_style_init_copy (&command->style, + &src->stroke.style); + if (unlikely (status)) + goto err_path; + + command->ctm = src->stroke.ctm; + command->ctm_inverse = src->stroke.ctm_inverse; + command->tolerance = src->stroke.tolerance; + command->antialias = src->stroke.antialias; + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto err_style; + + return CAIRO_STATUS_SUCCESS; + +err_style: + _cairo_stroke_style_fini (&command->style); +err_path: + _cairo_path_fixed_fini (&command->path); +err_source: + _cairo_pattern_fini (&command->source.base); +err_command: + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy__fill (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_fill_t *command; + cairo_status_t status; + + command = _cairo_malloc (sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->fill.source.base); + if (unlikely (status)) + goto err_command; + + status = _cairo_path_fixed_init_copy (&command->path, &src->fill.path); + if (unlikely (status)) + goto err_source; + + command->fill_rule = src->fill.fill_rule; + command->tolerance = src->fill.tolerance; + command->antialias = src->fill.antialias; + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto err_path; + + return CAIRO_STATUS_SUCCESS; + +err_path: + _cairo_path_fixed_fini (&command->path); +err_source: + _cairo_pattern_fini (&command->source.base); +err_command: + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy__glyphs (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_show_text_glyphs_t *command; + cairo_status_t status; + + command = _cairo_malloc (sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->show_text_glyphs.source.base); + if (unlikely (status)) + goto err_command; + + command->utf8 = NULL; + command->utf8_len = src->show_text_glyphs.utf8_len; + command->glyphs = NULL; + command->num_glyphs = src->show_text_glyphs.num_glyphs; + command->clusters = NULL; + command->num_clusters = src->show_text_glyphs.num_clusters; + + if (command->utf8_len) { + command->utf8 = _cairo_malloc (command->utf8_len); + if (unlikely (command->utf8 == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err_arrays; + } + memcpy (command->utf8, src->show_text_glyphs.utf8, command->utf8_len); + } + if (command->num_glyphs) { + command->glyphs = _cairo_malloc_ab (command->num_glyphs, + sizeof (command->glyphs[0])); + if (unlikely (command->glyphs == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err_arrays; + } + memcpy (command->glyphs, src->show_text_glyphs.glyphs, + sizeof (command->glyphs[0]) * command->num_glyphs); + } + if (command->num_clusters) { + command->clusters = _cairo_malloc_ab (command->num_clusters, + sizeof (command->clusters[0])); + if (unlikely (command->clusters == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err_arrays; + } + memcpy (command->clusters, src->show_text_glyphs.clusters, + sizeof (command->clusters[0]) * command->num_clusters); + } + + command->cluster_flags = src->show_text_glyphs.cluster_flags; + + command->scaled_font = + cairo_scaled_font_reference (src->show_text_glyphs.scaled_font); + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) + goto err_arrays; + + return CAIRO_STATUS_SUCCESS; + +err_arrays: + free (command->utf8); + free (command->glyphs); + free (command->clusters); + _cairo_pattern_fini (&command->source.base); +err_command: + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy__tag (cairo_recording_surface_t *surface, + const cairo_command_t *src) +{ + cairo_command_tag_t *command; + cairo_status_t status; + + command = calloc (1, sizeof (*command)); + if (unlikely (command == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto err; + } + + _command_init_copy (surface, &command->header, &src->header); + + command->begin = src->tag.begin; + command->tag_name = strdup (src->tag.tag_name); + if (src->tag.begin) { + if (src->tag.attributes) + command->attributes = strdup (src->tag.attributes); + + status = _cairo_pattern_init_copy (&command->source.base, + &src->stroke.source.base); + if (unlikely (status)) + goto err_command; + + status = _cairo_stroke_style_init_copy (&command->style, + &src->stroke.style); + if (unlikely (status)) + goto err_source; + + command->ctm = src->stroke.ctm; + command->ctm_inverse = src->stroke.ctm_inverse; + } + + status = _cairo_recording_surface_commit (surface, &command->header); + if (unlikely (status)) { + if (src->tag.begin) + goto err_command; + else + goto err_style; + } + + return CAIRO_STATUS_SUCCESS; + +err_style: + _cairo_stroke_style_fini (&command->style); +err_source: + _cairo_pattern_fini (&command->source.base); +err_command: + free(command->tag_name); + free(command->attributes); + free(command); +err: + return status; +} + +static cairo_status_t +_cairo_recording_surface_copy (cairo_recording_surface_t *dst, + cairo_recording_surface_t *src) +{ + cairo_command_t **elements; + int i, num_elements; + cairo_status_t status; + + elements = _cairo_array_index (&src->commands, 0); + num_elements = src->commands.num_elements; + for (i = 0; i < num_elements; i++) { + const cairo_command_t *command = elements[i]; + + switch (command->header.type) { + case CAIRO_COMMAND_PAINT: + status = _cairo_recording_surface_copy__paint (dst, command); + break; + + case CAIRO_COMMAND_MASK: + status = _cairo_recording_surface_copy__mask (dst, command); + break; + + case CAIRO_COMMAND_STROKE: + status = _cairo_recording_surface_copy__stroke (dst, command); + break; + + case CAIRO_COMMAND_FILL: + status = _cairo_recording_surface_copy__fill (dst, command); + break; + + case CAIRO_COMMAND_SHOW_TEXT_GLYPHS: + status = _cairo_recording_surface_copy__glyphs (dst, command); + break; + + case CAIRO_COMMAND_TAG: + status = _cairo_recording_surface_copy__tag (dst, command); + break; + + default: + ASSERT_NOT_REACHED; + } + + if (unlikely (status)) + return status; + } + + return CAIRO_STATUS_SUCCESS; +} + +/** + * _cairo_recording_surface_snapshot: + * @surface: a #cairo_surface_t which must be a recording surface + * + * Make an immutable copy of @surface. It is an error to call a + * surface-modifying function on the result of this function. + * + * The caller owns the return value and should call + * cairo_surface_destroy() when finished with it. This function will not + * return %NULL, but will return a nil surface instead. + * + * Return value: The snapshot surface. + **/ +static cairo_surface_t * +_cairo_recording_surface_snapshot (void *abstract_other) +{ + cairo_recording_surface_t *other = abstract_other; + cairo_recording_surface_t *surface; + cairo_status_t status; + + surface = _cairo_malloc (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 */ + other->base.content, + other->base.is_vector); + + surface->extents_pixels = other->extents_pixels; + surface->extents = other->extents; + surface->unbounded = other->unbounded; + + surface->base.is_clear = other->base.is_clear; + + surface->bbtree.left = surface->bbtree.right = NULL; + surface->bbtree.chain = INVALID_CHAIN; + + surface->indices = NULL; + surface->num_indices = 0; + surface->optimize_clears = TRUE; + + _cairo_array_init (&surface->commands, sizeof (cairo_command_t *)); + status = _cairo_recording_surface_copy (surface, other); + if (unlikely (status)) { + cairo_surface_destroy (&surface->base); + return _cairo_surface_create_in_error (status); + } + + return &surface->base; +} + +static cairo_bool_t +_cairo_recording_surface_get_extents (void *abstract_surface, + cairo_rectangle_int_t *rectangle) +{ + cairo_recording_surface_t *surface = abstract_surface; + + if (surface->unbounded) + return FALSE; + + *rectangle = surface->extents; + return TRUE; +} + +static const cairo_surface_backend_t cairo_recording_surface_backend = { + CAIRO_SURFACE_TYPE_RECORDING, + _cairo_recording_surface_finish, + + _cairo_default_context_create, + + _cairo_recording_surface_create_similar, + NULL, /* create similar image */ + NULL, /* map to image */ + NULL, /* unmap image */ + + _cairo_surface_default_source, + _cairo_recording_surface_acquire_source_image, + _cairo_recording_surface_release_source_image, + _cairo_recording_surface_snapshot, + + NULL, /* copy_page */ + NULL, /* show_page */ + + _cairo_recording_surface_get_extents, + NULL, /* get_font_options */ + + NULL, /* flush */ + NULL, /* mark_dirty_rectangle */ + + /* Here are the 5 basic drawing operations, (which are in some + * sense the only things that cairo_recording_surface should need to + * implement). However, we implement the more generic show_text_glyphs + * instead of show_glyphs. One or the other is eough. */ + + _cairo_recording_surface_paint, + _cairo_recording_surface_mask, + _cairo_recording_surface_stroke, + _cairo_recording_surface_fill, + NULL, /* fill-stroke */ + NULL, + _cairo_recording_surface_has_show_text_glyphs, + _cairo_recording_surface_show_text_glyphs, + NULL, /* get_supported_mime_types */ + _cairo_recording_surface_tag, +}; + +cairo_int_status_t +_cairo_recording_surface_get_path (cairo_surface_t *abstract_surface, + cairo_path_fixed_t *path) +{ + cairo_recording_surface_t *surface; + cairo_command_t **elements; + int i, num_elements; + cairo_int_status_t status; + + if (unlikely (abstract_surface->status)) + return abstract_surface->status; + + surface = (cairo_recording_surface_t *) abstract_surface; + status = CAIRO_STATUS_SUCCESS; + + 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: + case CAIRO_COMMAND_MASK: + status = CAIRO_INT_STATUS_UNSUPPORTED; + break; + + case CAIRO_COMMAND_STROKE: + { + cairo_traps_t traps; + + _cairo_traps_init (&traps); + + /* XXX call cairo_stroke_to_path() when that is implemented */ + status = _cairo_path_fixed_stroke_polygon_to_traps (&command->stroke.path, + &command->stroke.style, + &command->stroke.ctm, + &command->stroke.ctm_inverse, + command->stroke.tolerance, + &traps); + + if (status == CAIRO_INT_STATUS_SUCCESS) + status = _cairo_traps_path (&traps, path); + + _cairo_traps_fini (&traps); + break; + } + case CAIRO_COMMAND_FILL: + { + status = _cairo_path_fixed_append (path, + &command->fill.path, + 0, 0); + break; + } + case CAIRO_COMMAND_SHOW_TEXT_GLYPHS: + { + status = _cairo_scaled_font_glyph_path (command->show_text_glyphs.scaled_font, + command->show_text_glyphs.glyphs, + command->show_text_glyphs.num_glyphs, + path); + break; + } + + case CAIRO_COMMAND_TAG: + break; + + default: + ASSERT_NOT_REACHED; + } + + if (unlikely (status)) + break; + } + + return status; +} + +static int +_cairo_recording_surface_get_visible_commands (cairo_recording_surface_t *surface, + const cairo_rectangle_int_t *extents) +{ + unsigned int num_visible, *indices; + cairo_box_t box; + + if (surface->commands.num_elements == 0) + return 0; + + _cairo_box_from_rectangle (&box, extents); + + if (surface->bbtree.chain == INVALID_CHAIN) + _cairo_recording_surface_create_bbtree (surface); + + indices = surface->indices; + bbtree_foreach_mark_visible (&surface->bbtree, &box, &indices); + num_visible = indices - surface->indices; + if (num_visible > 1) + sort_indices (surface->indices, num_visible); + + return num_visible; +} + +static void +_cairo_recording_surface_merge_source_attributes (cairo_recording_surface_t *surface, + cairo_operator_t op, + const cairo_pattern_t *source) +{ + if (op != CAIRO_OPERATOR_OVER) + surface->has_only_op_over = FALSE; + + if (source->type == CAIRO_PATTERN_TYPE_SURFACE) { + cairo_surface_pattern_t *surf_pat = (cairo_surface_pattern_t *) source; + cairo_surface_t *surf = surf_pat->surface; + cairo_surface_t *free_me = NULL; + + if (_cairo_surface_is_snapshot (surf)) + free_me = surf = _cairo_surface_snapshot_get_target (surf); + + if (surf->type == CAIRO_SURFACE_TYPE_RECORDING) { + cairo_recording_surface_t *rec_surf = (cairo_recording_surface_t *) surf; + + if (! _cairo_recording_surface_has_only_bilevel_alpha (rec_surf)) + surface->has_bilevel_alpha = FALSE; + + if (! _cairo_recording_surface_has_only_op_over (rec_surf)) + surface->has_only_op_over = FALSE; + + } else if (surf->type == CAIRO_SURFACE_TYPE_IMAGE) { + cairo_image_surface_t *img_surf = (cairo_image_surface_t *) surf; + + if (_cairo_image_analyze_transparency (img_surf) == CAIRO_IMAGE_HAS_ALPHA) + surface->has_bilevel_alpha = FALSE; + + } else { + if (!_cairo_pattern_is_clear (source) && !_cairo_pattern_is_opaque (source, NULL)) + surface->has_bilevel_alpha = FALSE; + } + + cairo_surface_destroy (free_me); + return; + + } else if (source->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) { + cairo_surface_t *image; + cairo_surface_t *raster; + + image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); + raster = _cairo_raster_source_pattern_acquire (source, image, NULL); + cairo_surface_destroy (image); + if (raster) { + if (raster->type == CAIRO_SURFACE_TYPE_IMAGE) { + if (_cairo_image_analyze_transparency ((cairo_image_surface_t *)raster) == CAIRO_IMAGE_HAS_ALPHA) + surface->has_bilevel_alpha = FALSE; + } + + _cairo_raster_source_pattern_release (source, raster); + if (raster->type == CAIRO_SURFACE_TYPE_IMAGE) + return; + } + } + + if (!_cairo_pattern_is_clear (source) && !_cairo_pattern_is_opaque (source, NULL)) + surface->has_bilevel_alpha = FALSE; +} + +static cairo_status_t +_cairo_recording_surface_replay_internal (cairo_recording_surface_t *surface, + 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) +{ + cairo_surface_wrapper_t wrapper; + cairo_command_t **elements; + cairo_bool_t replay_all = + type == CAIRO_RECORDING_CREATE_REGIONS || region == CAIRO_RECORDING_REGION_ALL; + cairo_int_status_t status = CAIRO_STATUS_SUCCESS; + cairo_rectangle_int_t extents; + cairo_bool_t use_indices = FALSE; + const cairo_rectangle_int_t *r; + unsigned int i, num_elements; + + if (unlikely (surface->base.status)) + return surface->base.status; + + if (unlikely (target->status)) + return target->status; + + if (unlikely (surface->base.finished)) + return _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); + + if (surface->base.is_clear) + return CAIRO_STATUS_SUCCESS; + + assert (_cairo_surface_is_recording (&surface->base)); + + _cairo_surface_wrapper_init (&wrapper, target); + if (surface_extents) + _cairo_surface_wrapper_intersect_extents (&wrapper, surface_extents); + r = &_cairo_unbounded_rectangle; + if (! surface->unbounded && !surface_is_unbounded) { + _cairo_surface_wrapper_intersect_extents (&wrapper, &surface->extents); + r = &surface->extents; + } + _cairo_surface_wrapper_set_inverse_transform (&wrapper, surface_transform); + _cairo_surface_wrapper_set_clip (&wrapper, target_clip); + + /* Compute the extents of the target clip in recorded device space */ + if (! _cairo_surface_wrapper_get_target_extents (&wrapper, surface_is_unbounded, &extents)) + goto done; + + surface->has_bilevel_alpha = TRUE; + surface->has_only_op_over = TRUE; + + num_elements = surface->commands.num_elements; + elements = _cairo_array_index (&surface->commands, 0); + if (extents.width < r->width || extents.height < r->height) { + num_elements = + _cairo_recording_surface_get_visible_commands (surface, &extents); + use_indices = num_elements != surface->commands.num_elements; + } + + for (i = 0; i < num_elements; i++) { + cairo_command_t *command = elements[use_indices ? surface->indices[i] : i]; + + if (! replay_all && command->header.region != region) + continue; + + if (! _cairo_rectangle_intersects (&extents, &command->header.extents)) + continue; + + switch (command->header.type) { + case CAIRO_COMMAND_PAINT: + status = _cairo_surface_wrapper_paint (&wrapper, + command->header.op, + &command->paint.source.base, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->paint.source.base); + } + break; + + case CAIRO_COMMAND_MASK: + status = _cairo_surface_wrapper_mask (&wrapper, + command->header.op, + &command->mask.source.base, + &command->mask.mask.base, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->mask.source.base); + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->mask.mask.base); + } + break; + + case CAIRO_COMMAND_STROKE: + status = _cairo_surface_wrapper_stroke (&wrapper, + command->header.op, + &command->stroke.source.base, + &command->stroke.path, + &command->stroke.style, + &command->stroke.ctm, + &command->stroke.ctm_inverse, + command->stroke.tolerance, + command->stroke.antialias, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->stroke.source.base); + } + break; + + case CAIRO_COMMAND_FILL: + status = CAIRO_INT_STATUS_UNSUPPORTED; + if (_cairo_surface_wrapper_has_fill_stroke (&wrapper)) { + cairo_command_t *stroke_command; + + stroke_command = NULL; + if (type != CAIRO_RECORDING_CREATE_REGIONS && i < num_elements - 1) + stroke_command = elements[i + 1]; + + if (stroke_command != NULL && + type == CAIRO_RECORDING_REPLAY && + region != CAIRO_RECORDING_REGION_ALL) + { + if (stroke_command->header.region != region) + stroke_command = NULL; + } + + if (stroke_command != NULL && + stroke_command->header.type == CAIRO_COMMAND_STROKE && + _cairo_path_fixed_equal (&command->fill.path, + &stroke_command->stroke.path) && + _cairo_clip_equal (command->header.clip, + stroke_command->header.clip)) + { + status = _cairo_surface_wrapper_fill_stroke (&wrapper, + command->header.op, + &command->fill.source.base, + command->fill.fill_rule, + command->fill.tolerance, + command->fill.antialias, + &command->fill.path, + stroke_command->header.op, + &stroke_command->stroke.source.base, + &stroke_command->stroke.style, + &stroke_command->stroke.ctm, + &stroke_command->stroke.ctm_inverse, + stroke_command->stroke.tolerance, + stroke_command->stroke.antialias, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->fill.source.base); + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->stroke.source.base); + } + i++; + } + } + if (status == CAIRO_INT_STATUS_UNSUPPORTED) { + status = _cairo_surface_wrapper_fill (&wrapper, + command->header.op, + &command->fill.source.base, + &command->fill.path, + command->fill.fill_rule, + command->fill.tolerance, + command->fill.antialias, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->fill.source.base); + } + } + break; + + case CAIRO_COMMAND_SHOW_TEXT_GLYPHS: + status = _cairo_surface_wrapper_show_text_glyphs (&wrapper, + command->header.op, + &command->show_text_glyphs.source.base, + command->show_text_glyphs.utf8, command->show_text_glyphs.utf8_len, + command->show_text_glyphs.glyphs, command->show_text_glyphs.num_glyphs, + command->show_text_glyphs.clusters, command->show_text_glyphs.num_clusters, + command->show_text_glyphs.cluster_flags, + command->show_text_glyphs.scaled_font, + command->header.clip); + if (type == CAIRO_RECORDING_CREATE_REGIONS) { + _cairo_recording_surface_merge_source_attributes (surface, + command->header.op, + &command->show_text_glyphs.source.base); + } + break; + + case CAIRO_COMMAND_TAG: + status = _cairo_surface_wrapper_tag (&wrapper, + command->tag.begin, + command->tag.tag_name, + command->tag.attributes, + &command->tag.source.base, + &command->tag.style, + &command->tag.ctm, + &command->tag.ctm_inverse, + command->header.clip); + break; + + default: + ASSERT_NOT_REACHED; + } + + if (type == CAIRO_RECORDING_CREATE_REGIONS && command->header.region != CAIRO_RECORDING_REGION_NATIVE) { + if (status == CAIRO_INT_STATUS_SUCCESS) { + command->header.region = CAIRO_RECORDING_REGION_NATIVE; + } else if (status == CAIRO_INT_STATUS_IMAGE_FALLBACK) { + command->header.region = CAIRO_RECORDING_REGION_IMAGE_FALLBACK; + status = CAIRO_INT_STATUS_SUCCESS; + } else { + assert (_cairo_int_status_is_error (status)); + } + } + + if (unlikely (status)) + break; + } + +done: + _cairo_surface_wrapper_fini (&wrapper); + return _cairo_surface_set_error (&surface->base, status); +} + +cairo_status_t +_cairo_recording_surface_replay_one (cairo_recording_surface_t *surface, + long unsigned index, + cairo_surface_t *target) +{ + cairo_surface_wrapper_t wrapper; + cairo_command_t **elements, *command; + cairo_int_status_t status; + + if (unlikely (surface->base.status)) + return surface->base.status; + + if (unlikely (target->status)) + return target->status; + + if (unlikely (surface->base.finished)) + return _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); + + assert (_cairo_surface_is_recording (&surface->base)); + + /* XXX + * Use a surface wrapper because we may want to do transformed + * replay in the future. + */ + _cairo_surface_wrapper_init (&wrapper, target); + + if (index > surface->commands.num_elements) + return _cairo_error (CAIRO_STATUS_READ_ERROR); + + elements = _cairo_array_index (&surface->commands, 0); + command = elements[index]; + switch (command->header.type) { + case CAIRO_COMMAND_PAINT: + status = _cairo_surface_wrapper_paint (&wrapper, + command->header.op, + &command->paint.source.base, + command->header.clip); + break; + + case CAIRO_COMMAND_MASK: + status = _cairo_surface_wrapper_mask (&wrapper, + command->header.op, + &command->mask.source.base, + &command->mask.mask.base, + command->header.clip); + break; + + case CAIRO_COMMAND_STROKE: + status = _cairo_surface_wrapper_stroke (&wrapper, + command->header.op, + &command->stroke.source.base, + &command->stroke.path, + &command->stroke.style, + &command->stroke.ctm, + &command->stroke.ctm_inverse, + command->stroke.tolerance, + command->stroke.antialias, + command->header.clip); + break; + + case CAIRO_COMMAND_FILL: + status = _cairo_surface_wrapper_fill (&wrapper, + command->header.op, + &command->fill.source.base, + &command->fill.path, + command->fill.fill_rule, + command->fill.tolerance, + command->fill.antialias, + command->header.clip); + break; + + case CAIRO_COMMAND_SHOW_TEXT_GLYPHS: + status = _cairo_surface_wrapper_show_text_glyphs (&wrapper, + command->header.op, + &command->show_text_glyphs.source.base, + command->show_text_glyphs.utf8, command->show_text_glyphs.utf8_len, + command->show_text_glyphs.glyphs, command->show_text_glyphs.num_glyphs, + command->show_text_glyphs.clusters, command->show_text_glyphs.num_clusters, + command->show_text_glyphs.cluster_flags, + command->show_text_glyphs.scaled_font, + command->header.clip); + break; + + case CAIRO_COMMAND_TAG: + status = _cairo_surface_wrapper_tag (&wrapper, + command->tag.begin, + command->tag.tag_name, + command->tag.attributes, + &command->tag.source.base, + &command->tag.style, + &command->tag.ctm, + &command->tag.ctm_inverse, + command->header.clip); + break; + + default: + ASSERT_NOT_REACHED; + } + + _cairo_surface_wrapper_fini (&wrapper); + return _cairo_surface_set_error (&surface->base, status); +} +/** + * _cairo_recording_surface_replay: + * @surface: the #cairo_recording_surface_t + * @target: a target #cairo_surface_t onto which to replay the operations + * @width_pixels: width of the surface, in pixels + * @height_pixels: height of the surface, in pixels + * + * A recording surface can be "replayed" against any target surface, + * after which 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. + **/ +cairo_status_t +_cairo_recording_surface_replay (cairo_surface_t *surface, + cairo_surface_t *target) +{ + return _cairo_recording_surface_replay_internal ((cairo_recording_surface_t *) surface, NULL, NULL, + target, NULL, FALSE, + CAIRO_RECORDING_REPLAY, + CAIRO_RECORDING_REGION_ALL); +} + +cairo_status_t +_cairo_recording_surface_replay_with_clip (cairo_surface_t *surface, + const cairo_matrix_t *surface_transform, + cairo_surface_t *target, + const cairo_clip_t *target_clip) +{ + return _cairo_recording_surface_replay_internal ((cairo_recording_surface_t *) surface, NULL, surface_transform, + target, target_clip, FALSE, + CAIRO_RECORDING_REPLAY, + CAIRO_RECORDING_REGION_ALL); +} + +/* Replay recording to surface. When the return status of each operation is + * one of %CAIRO_STATUS_SUCCESS, %CAIRO_INT_STATUS_UNSUPPORTED, or + * %CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY the status of each operation + * will be stored in the recording surface. Any other status will abort the + * replay and return the status. + */ +cairo_status_t +_cairo_recording_surface_replay_and_create_regions (cairo_surface_t *surface, + const cairo_matrix_t *surface_transform, + cairo_surface_t *target, + cairo_bool_t surface_is_unbounded) +{ + return _cairo_recording_surface_replay_internal ((cairo_recording_surface_t *) surface, NULL, surface_transform, + target, NULL, + surface_is_unbounded, + CAIRO_RECORDING_CREATE_REGIONS, + CAIRO_RECORDING_REGION_ALL); +} + +cairo_status_t +_cairo_recording_surface_replay_region (cairo_surface_t *surface, + const cairo_rectangle_int_t *surface_extents, + cairo_surface_t *target, + cairo_recording_region_type_t region) +{ + return _cairo_recording_surface_replay_internal ((cairo_recording_surface_t *) surface, + surface_extents, NULL, + target, NULL, FALSE, + CAIRO_RECORDING_REPLAY, + region); +} + +static cairo_status_t +_recording_surface_get_ink_bbox (cairo_recording_surface_t *surface, + cairo_box_t *bbox, + const cairo_matrix_t *transform) +{ + cairo_surface_t *null_surface; + cairo_surface_t *analysis_surface; + cairo_status_t status; + + null_surface = _cairo_null_surface_create (surface->base.content); + analysis_surface = _cairo_analysis_surface_create (null_surface); + cairo_surface_destroy (null_surface); + + status = analysis_surface->status; + if (unlikely (status)) + return status; + + if (transform != NULL) + _cairo_analysis_surface_set_ctm (analysis_surface, transform); + + status = _cairo_recording_surface_replay (&surface->base, analysis_surface); + _cairo_analysis_surface_get_bounding_box (analysis_surface, bbox); + cairo_surface_destroy (analysis_surface); + + return status; +} + +/** + * cairo_recording_surface_ink_extents: + * @surface: a #cairo_recording_surface_t + * @x0: the x-coordinate of the top-left of the ink bounding box + * @y0: the y-coordinate of the top-left of the ink bounding box + * @width: the width of the ink bounding box + * @height: the height of the ink bounding box + * + * Measures the extents of the operations stored within the recording-surface. + * This is useful to compute the required size of an image surface (or + * equivalent) into which to replay the full sequence of drawing operations. + * + * Since: 1.10 + **/ +void +cairo_recording_surface_ink_extents (cairo_surface_t *surface, + double *x0, + double *y0, + double *width, + double *height) +{ + cairo_status_t status; + cairo_box_t bbox; + + memset (&bbox, 0, sizeof (bbox)); + + if (surface->status || ! _cairo_surface_is_recording (surface)) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + goto DONE; + } + + status = _recording_surface_get_ink_bbox ((cairo_recording_surface_t *) surface, + &bbox, + NULL); + if (unlikely (status)) + status = _cairo_surface_set_error (surface, status); + +DONE: + if (x0) + *x0 = _cairo_fixed_to_double (bbox.p1.x); + if (y0) + *y0 = _cairo_fixed_to_double (bbox.p1.y); + if (width) + *width = _cairo_fixed_to_double (bbox.p2.x - bbox.p1.x); + if (height) + *height = _cairo_fixed_to_double (bbox.p2.y - bbox.p1.y); +} + +cairo_status_t +_cairo_recording_surface_get_bbox (cairo_recording_surface_t *surface, + cairo_box_t *bbox, + const cairo_matrix_t *transform) +{ + if (! surface->unbounded) { + _cairo_box_from_rectangle (bbox, &surface->extents); + if (transform != NULL) + _cairo_matrix_transform_bounding_box_fixed (transform, bbox, NULL); + + return CAIRO_STATUS_SUCCESS; + } + + return _recording_surface_get_ink_bbox (surface, bbox, transform); +} + +cairo_status_t +_cairo_recording_surface_get_ink_bbox (cairo_recording_surface_t *surface, + cairo_box_t *bbox, + const cairo_matrix_t *transform) +{ + return _recording_surface_get_ink_bbox (surface, bbox, transform); +} + +/** + * cairo_recording_surface_get_extents: + * @surface: a #cairo_recording_surface_t + * @extents: the #cairo_rectangle_t to be assigned the extents + * + * Get the extents of the recording-surface. + * + * Return value: %TRUE if the surface is bounded, of recording type, and + * not in an error state, otherwise %FALSE + * + * Since: 1.12 + **/ +cairo_bool_t +cairo_recording_surface_get_extents (cairo_surface_t *surface, + cairo_rectangle_t *extents) +{ + cairo_recording_surface_t *record; + + if (surface->status || ! _cairo_surface_is_recording (surface)) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + return FALSE; + } + + record = (cairo_recording_surface_t *)surface; + if (record->unbounded) + return FALSE; + + *extents = record->extents_pixels; + return TRUE; +} + +cairo_bool_t +_cairo_recording_surface_has_only_bilevel_alpha (cairo_recording_surface_t *surface) +{ + return surface->has_bilevel_alpha; +} + +cairo_bool_t +_cairo_recording_surface_has_only_op_over (cairo_recording_surface_t *surface) +{ + return surface->has_only_op_over; +} |