forked from KolibriOS/kolibrios
906 lines
27 KiB
C
906 lines
27 KiB
C
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/*
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* Copyright © 2006 Keith Packard
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* Copyright © 2007 Adrian Johnson
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Keith Packard
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*
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* Contributor(s):
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* Keith Packard <keithp@keithp.com>
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* Adrian Johnson <ajohnson@redneon.com>
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*/
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#include "cairoint.h"
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#include "cairo-analysis-surface-private.h"
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#include "cairo-error-private.h"
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#include "cairo-paginated-private.h"
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#include "cairo-recording-surface-private.h"
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#include "cairo-surface-subsurface-private.h"
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#include "cairo-region-private.h"
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typedef struct {
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cairo_surface_t base;
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cairo_surface_t *target;
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cairo_bool_t first_op;
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cairo_bool_t has_supported;
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cairo_bool_t has_unsupported;
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cairo_region_t supported_region;
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cairo_region_t fallback_region;
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cairo_box_t page_bbox;
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cairo_bool_t has_ctm;
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cairo_matrix_t ctm;
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} cairo_analysis_surface_t;
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cairo_int_status_t
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_cairo_analysis_surface_merge_status (cairo_int_status_t status_a,
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cairo_int_status_t status_b)
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{
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/* fatal errors should be checked and propagated at source */
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assert (! _cairo_status_is_error (status_a));
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assert (! _cairo_status_is_error (status_b));
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/* return the most important status */
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if (status_a == CAIRO_INT_STATUS_UNSUPPORTED ||
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status_b == CAIRO_INT_STATUS_UNSUPPORTED)
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return CAIRO_INT_STATUS_UNSUPPORTED;
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if (status_a == CAIRO_INT_STATUS_IMAGE_FALLBACK ||
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status_b == CAIRO_INT_STATUS_IMAGE_FALLBACK)
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return CAIRO_INT_STATUS_IMAGE_FALLBACK;
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if (status_a == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN ||
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status_b == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
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return CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN;
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if (status_a == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY ||
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status_b == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
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return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
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/* at this point we have checked all the valid internal codes, so... */
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assert (status_a == CAIRO_STATUS_SUCCESS &&
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status_b == CAIRO_STATUS_SUCCESS);
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_int_status_t
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_analyze_recording_surface_pattern (cairo_analysis_surface_t *surface,
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const cairo_pattern_t *pattern)
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{
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const cairo_surface_pattern_t *surface_pattern;
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cairo_bool_t old_has_ctm;
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cairo_matrix_t old_ctm, p2d;
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cairo_status_t status;
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cairo_surface_t *source;
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assert (pattern->type == CAIRO_PATTERN_TYPE_SURFACE);
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surface_pattern = (const cairo_surface_pattern_t *) pattern;
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assert (surface_pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING);
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old_ctm = surface->ctm;
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old_has_ctm = surface->has_ctm;
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p2d = pattern->matrix;
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status = cairo_matrix_invert (&p2d);
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assert (status == CAIRO_STATUS_SUCCESS);
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cairo_matrix_multiply (&surface->ctm, &p2d, &surface->ctm);
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surface->has_ctm = ! _cairo_matrix_is_identity (&surface->ctm);
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source = surface_pattern->surface;
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if (source->backend->type == CAIRO_SURFACE_TYPE_SUBSURFACE) {
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cairo_surface_subsurface_t *sub = (cairo_surface_subsurface_t *) source;
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source = sub->target;
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}
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status = _cairo_recording_surface_replay_and_create_regions (source, &surface->base);
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surface->ctm = old_ctm;
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surface->has_ctm = old_has_ctm;
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return status;
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}
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static cairo_int_status_t
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_add_operation (cairo_analysis_surface_t *surface,
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cairo_rectangle_int_t *rect,
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cairo_int_status_t backend_status)
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{
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cairo_int_status_t status;
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cairo_box_t bbox;
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if (rect->width == 0 || rect->height == 0) {
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/* Even though the operation is not visible we must be careful
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* to not allow unsupported operations to be replayed to the
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* backend during CAIRO_PAGINATED_MODE_RENDER */
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if (backend_status == CAIRO_STATUS_SUCCESS ||
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backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
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{
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return CAIRO_STATUS_SUCCESS;
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}
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else
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{
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return CAIRO_INT_STATUS_IMAGE_FALLBACK;
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}
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}
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_cairo_box_from_rectangle (&bbox, rect);
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if (surface->has_ctm) {
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int tx, ty;
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if (_cairo_matrix_is_integer_translation (&surface->ctm, &tx, &ty)) {
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rect->x += tx;
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rect->y += ty;
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} else {
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_cairo_matrix_transform_bounding_box_fixed (&surface->ctm,
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&bbox, NULL);
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if (bbox.p1.x == bbox.p2.x || bbox.p1.y == bbox.p2.y) {
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/* Even though the operation is not visible we must be
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* careful to not allow unsupported operations to be
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* replayed to the backend during
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* CAIRO_PAGINATED_MODE_RENDER */
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if (backend_status == CAIRO_STATUS_SUCCESS ||
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backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
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{
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return CAIRO_STATUS_SUCCESS;
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}
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else
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{
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return CAIRO_INT_STATUS_IMAGE_FALLBACK;
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}
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}
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_cairo_box_round_to_rectangle (&bbox, rect);
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}
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}
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if (surface->first_op) {
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surface->first_op = FALSE;
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surface->page_bbox = bbox;
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} else {
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if (bbox.p1.x < surface->page_bbox.p1.x)
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surface->page_bbox.p1.x = bbox.p1.x;
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if (bbox.p1.y < surface->page_bbox.p1.y)
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surface->page_bbox.p1.y = bbox.p1.y;
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if (bbox.p2.x > surface->page_bbox.p2.x)
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surface->page_bbox.p2.x = bbox.p2.x;
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if (bbox.p2.y > surface->page_bbox.p2.y)
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surface->page_bbox.p2.y = bbox.p2.y;
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}
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/* If the operation is completely enclosed within the fallback
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* region there is no benefit in emitting a native operation as
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* the fallback image will be painted on top.
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*/
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if (cairo_region_contains_rectangle (&surface->fallback_region, rect) == CAIRO_REGION_OVERLAP_IN)
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return CAIRO_INT_STATUS_IMAGE_FALLBACK;
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if (backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY) {
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/* A status of CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY indicates
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* that the backend only supports this operation if the
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* transparency removed. If the extents of this operation does
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* not intersect any other native operation, the operation is
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* natively supported and the backend will blend the
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* transparency into the white background.
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*/
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if (cairo_region_contains_rectangle (&surface->supported_region, rect) == CAIRO_REGION_OVERLAP_OUT)
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backend_status = CAIRO_STATUS_SUCCESS;
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}
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if (backend_status == CAIRO_STATUS_SUCCESS) {
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/* Add the operation to the supported region. Operations in
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* this region will be emitted as native operations.
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*/
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surface->has_supported = TRUE;
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return cairo_region_union_rectangle (&surface->supported_region, rect);
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}
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/* Add the operation to the unsupported region. This region will
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* be painted as an image after all native operations have been
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* emitted.
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*/
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surface->has_unsupported = TRUE;
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status = cairo_region_union_rectangle (&surface->fallback_region, rect);
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/* The status CAIRO_INT_STATUS_IMAGE_FALLBACK is used to indicate
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* unsupported operations to the recording surface as using
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* CAIRO_INT_STATUS_UNSUPPORTED would cause cairo-surface to
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* invoke the cairo-surface-fallback path then return
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* CAIRO_STATUS_SUCCESS.
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*/
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if (status == CAIRO_STATUS_SUCCESS)
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return CAIRO_INT_STATUS_IMAGE_FALLBACK;
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else
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return status;
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}
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static cairo_status_t
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_cairo_analysis_surface_finish (void *abstract_surface)
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{
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cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
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_cairo_region_fini (&surface->supported_region);
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_cairo_region_fini (&surface->fallback_region);
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cairo_surface_destroy (surface->target);
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_bool_t
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_cairo_analysis_surface_get_extents (void *abstract_surface,
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cairo_rectangle_int_t *rectangle)
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{
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cairo_analysis_surface_t *surface = abstract_surface;
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return _cairo_surface_get_extents (surface->target, rectangle);
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}
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static void
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_rectangle_intersect_clip (cairo_rectangle_int_t *extents, cairo_clip_t *clip)
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{
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const cairo_rectangle_int_t *clip_extents;
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cairo_bool_t is_empty;
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clip_extents = NULL;
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if (clip != NULL)
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clip_extents = _cairo_clip_get_extents (clip);
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if (clip_extents != NULL)
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is_empty = _cairo_rectangle_intersect (extents, clip_extents);
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}
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static void
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_cairo_analysis_surface_operation_extents (cairo_analysis_surface_t *surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_clip_t *clip,
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cairo_rectangle_int_t *extents)
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{
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cairo_bool_t is_empty;
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is_empty = _cairo_surface_get_extents (&surface->base, extents);
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if (_cairo_operator_bounded_by_source (op)) {
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cairo_rectangle_int_t source_extents;
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_cairo_pattern_get_extents (source, &source_extents);
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is_empty = _cairo_rectangle_intersect (extents, &source_extents);
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}
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_rectangle_intersect_clip (extents, clip);
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}
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static cairo_int_status_t
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_cairo_analysis_surface_paint (void *abstract_surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_clip_t *clip)
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{
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cairo_analysis_surface_t *surface = abstract_surface;
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cairo_status_t backend_status;
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cairo_rectangle_int_t extents;
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if (surface->target->backend->paint == NULL) {
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backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
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} else {
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backend_status =
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surface->target->backend->paint (surface->target,
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op, source, clip);
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if (_cairo_status_is_error (backend_status))
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return backend_status;
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}
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if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
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backend_status = _analyze_recording_surface_pattern (surface, source);
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_cairo_analysis_surface_operation_extents (surface,
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op, source, clip,
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&extents);
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return _add_operation (surface, &extents, backend_status);
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}
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static cairo_int_status_t
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_cairo_analysis_surface_mask (void *abstract_surface,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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const cairo_pattern_t *mask,
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cairo_clip_t *clip)
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{
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cairo_analysis_surface_t *surface = abstract_surface;
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cairo_int_status_t backend_status;
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cairo_rectangle_int_t extents;
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cairo_bool_t is_empty;
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if (surface->target->backend->mask == NULL) {
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backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
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} else {
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backend_status =
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surface->target->backend->mask (surface->target,
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op, source, mask, clip);
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if (_cairo_status_is_error (backend_status))
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return backend_status;
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}
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if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN) {
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cairo_int_status_t backend_source_status = CAIRO_STATUS_SUCCESS;
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cairo_int_status_t backend_mask_status = CAIRO_STATUS_SUCCESS;
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if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
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const cairo_surface_pattern_t *surface_pattern = (const cairo_surface_pattern_t *) source;
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if (_cairo_surface_is_recording (surface_pattern->surface)) {
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backend_source_status =
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_analyze_recording_surface_pattern (surface, source);
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if (_cairo_status_is_error (backend_source_status))
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return backend_source_status;
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}
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}
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if (mask->type == CAIRO_PATTERN_TYPE_SURFACE) {
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cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) mask;
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if (_cairo_surface_is_recording (surface_pattern->surface)) {
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backend_mask_status =
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_analyze_recording_surface_pattern (surface, mask);
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if (_cairo_status_is_error (backend_mask_status))
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return backend_mask_status;
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}
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}
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backend_status =
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_cairo_analysis_surface_merge_status (backend_source_status,
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backend_mask_status);
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}
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_cairo_analysis_surface_operation_extents (surface,
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op, source, clip,
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&extents);
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if (_cairo_operator_bounded_by_mask (op)) {
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cairo_rectangle_int_t mask_extents;
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_cairo_pattern_get_extents (mask, &mask_extents);
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is_empty = _cairo_rectangle_intersect (&extents, &mask_extents);
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}
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return _add_operation (surface, &extents, backend_status);
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}
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static cairo_int_status_t
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_cairo_analysis_surface_stroke (void *abstract_surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_path_fixed_t *path,
|
||
|
const cairo_stroke_style_t *style,
|
||
|
const cairo_matrix_t *ctm,
|
||
|
const cairo_matrix_t *ctm_inverse,
|
||
|
double tolerance,
|
||
|
cairo_antialias_t antialias,
|
||
|
cairo_clip_t *clip)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = abstract_surface;
|
||
|
cairo_status_t backend_status;
|
||
|
cairo_rectangle_int_t extents;
|
||
|
cairo_bool_t is_empty;
|
||
|
|
||
|
if (surface->target->backend->stroke == NULL) {
|
||
|
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
|
||
|
} else {
|
||
|
backend_status =
|
||
|
surface->target->backend->stroke (surface->target, op,
|
||
|
source, path, style,
|
||
|
ctm, ctm_inverse,
|
||
|
tolerance, antialias,
|
||
|
clip);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
}
|
||
|
|
||
|
if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
|
||
|
backend_status = _analyze_recording_surface_pattern (surface, source);
|
||
|
|
||
|
_cairo_analysis_surface_operation_extents (surface,
|
||
|
op, source, clip,
|
||
|
&extents);
|
||
|
|
||
|
if (_cairo_operator_bounded_by_mask (op)) {
|
||
|
cairo_rectangle_int_t mask_extents;
|
||
|
cairo_status_t status;
|
||
|
|
||
|
status = _cairo_path_fixed_stroke_extents (path, style,
|
||
|
ctm, ctm_inverse,
|
||
|
tolerance,
|
||
|
&mask_extents);
|
||
|
if (unlikely (status))
|
||
|
return status;
|
||
|
|
||
|
is_empty = _cairo_rectangle_intersect (&extents, &mask_extents);
|
||
|
}
|
||
|
|
||
|
return _add_operation (surface, &extents, backend_status);
|
||
|
}
|
||
|
|
||
|
static cairo_int_status_t
|
||
|
_cairo_analysis_surface_fill (void *abstract_surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_path_fixed_t *path,
|
||
|
cairo_fill_rule_t fill_rule,
|
||
|
double tolerance,
|
||
|
cairo_antialias_t antialias,
|
||
|
cairo_clip_t *clip)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = abstract_surface;
|
||
|
cairo_status_t backend_status;
|
||
|
cairo_rectangle_int_t extents;
|
||
|
cairo_bool_t is_empty;
|
||
|
|
||
|
if (surface->target->backend->fill == NULL) {
|
||
|
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
|
||
|
} else {
|
||
|
backend_status =
|
||
|
surface->target->backend->fill (surface->target, op,
|
||
|
source, path, fill_rule,
|
||
|
tolerance, antialias,
|
||
|
clip);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
}
|
||
|
|
||
|
if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
|
||
|
backend_status = _analyze_recording_surface_pattern (surface, source);
|
||
|
|
||
|
_cairo_analysis_surface_operation_extents (surface,
|
||
|
op, source, clip,
|
||
|
&extents);
|
||
|
|
||
|
if (_cairo_operator_bounded_by_mask (op)) {
|
||
|
cairo_rectangle_int_t mask_extents;
|
||
|
|
||
|
_cairo_path_fixed_fill_extents (path, fill_rule, tolerance,
|
||
|
&mask_extents);
|
||
|
|
||
|
is_empty = _cairo_rectangle_intersect (&extents, &mask_extents);
|
||
|
}
|
||
|
|
||
|
return _add_operation (surface, &extents, backend_status);
|
||
|
}
|
||
|
|
||
|
static cairo_int_status_t
|
||
|
_cairo_analysis_surface_show_glyphs (void *abstract_surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_glyph_t *glyphs,
|
||
|
int num_glyphs,
|
||
|
cairo_scaled_font_t *scaled_font,
|
||
|
cairo_clip_t *clip,
|
||
|
int *remaining_glyphs)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = abstract_surface;
|
||
|
cairo_status_t status, backend_status;
|
||
|
cairo_rectangle_int_t extents, glyph_extents;
|
||
|
cairo_bool_t is_empty;
|
||
|
|
||
|
/* Adapted from _cairo_surface_show_glyphs */
|
||
|
if (surface->target->backend->show_glyphs != NULL) {
|
||
|
backend_status =
|
||
|
surface->target->backend->show_glyphs (surface->target, op,
|
||
|
source,
|
||
|
glyphs, num_glyphs,
|
||
|
scaled_font,
|
||
|
clip,
|
||
|
remaining_glyphs);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
}
|
||
|
else if (surface->target->backend->show_text_glyphs != NULL)
|
||
|
{
|
||
|
backend_status =
|
||
|
surface->target->backend->show_text_glyphs (surface->target, op,
|
||
|
source,
|
||
|
NULL, 0,
|
||
|
glyphs, num_glyphs,
|
||
|
NULL, 0,
|
||
|
FALSE,
|
||
|
scaled_font,
|
||
|
clip);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
|
||
|
}
|
||
|
|
||
|
if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
|
||
|
backend_status = _analyze_recording_surface_pattern (surface, source);
|
||
|
|
||
|
_cairo_analysis_surface_operation_extents (surface,
|
||
|
op, source, clip,
|
||
|
&extents);
|
||
|
|
||
|
if (_cairo_operator_bounded_by_mask (op)) {
|
||
|
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
|
||
|
glyphs,
|
||
|
num_glyphs,
|
||
|
&glyph_extents,
|
||
|
NULL);
|
||
|
if (unlikely (status))
|
||
|
return status;
|
||
|
|
||
|
is_empty = _cairo_rectangle_intersect (&extents, &glyph_extents);
|
||
|
}
|
||
|
|
||
|
return _add_operation (surface, &extents, backend_status);
|
||
|
}
|
||
|
|
||
|
static cairo_bool_t
|
||
|
_cairo_analysis_surface_has_show_text_glyphs (void *abstract_surface)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = abstract_surface;
|
||
|
|
||
|
return cairo_surface_has_show_text_glyphs (surface->target);
|
||
|
}
|
||
|
|
||
|
static cairo_int_status_t
|
||
|
_cairo_analysis_surface_show_text_glyphs (void *abstract_surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
const char *utf8,
|
||
|
int utf8_len,
|
||
|
cairo_glyph_t *glyphs,
|
||
|
int num_glyphs,
|
||
|
const cairo_text_cluster_t *clusters,
|
||
|
int num_clusters,
|
||
|
cairo_text_cluster_flags_t cluster_flags,
|
||
|
cairo_scaled_font_t *scaled_font,
|
||
|
cairo_clip_t *clip)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = abstract_surface;
|
||
|
cairo_status_t status, backend_status;
|
||
|
cairo_rectangle_int_t extents, glyph_extents;
|
||
|
cairo_bool_t is_empty;
|
||
|
|
||
|
/* Adapted from _cairo_surface_show_glyphs */
|
||
|
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
|
||
|
if (surface->target->backend->show_text_glyphs != NULL) {
|
||
|
backend_status =
|
||
|
surface->target->backend->show_text_glyphs (surface->target, op,
|
||
|
source,
|
||
|
utf8, utf8_len,
|
||
|
glyphs, num_glyphs,
|
||
|
clusters, num_clusters,
|
||
|
cluster_flags,
|
||
|
scaled_font,
|
||
|
clip);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
}
|
||
|
if (backend_status == CAIRO_INT_STATUS_UNSUPPORTED &&
|
||
|
surface->target->backend->show_glyphs != NULL)
|
||
|
{
|
||
|
int remaining_glyphs = num_glyphs;
|
||
|
backend_status =
|
||
|
surface->target->backend->show_glyphs (surface->target, op,
|
||
|
source,
|
||
|
glyphs, num_glyphs,
|
||
|
scaled_font,
|
||
|
clip,
|
||
|
&remaining_glyphs);
|
||
|
if (_cairo_status_is_error (backend_status))
|
||
|
return backend_status;
|
||
|
|
||
|
glyphs += num_glyphs - remaining_glyphs;
|
||
|
num_glyphs = remaining_glyphs;
|
||
|
if (remaining_glyphs == 0)
|
||
|
backend_status = CAIRO_STATUS_SUCCESS;
|
||
|
}
|
||
|
|
||
|
if (backend_status == CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN)
|
||
|
backend_status = _analyze_recording_surface_pattern (surface, source);
|
||
|
|
||
|
_cairo_analysis_surface_operation_extents (surface,
|
||
|
op, source, clip,
|
||
|
&extents);
|
||
|
|
||
|
if (_cairo_operator_bounded_by_mask (op)) {
|
||
|
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
|
||
|
glyphs,
|
||
|
num_glyphs,
|
||
|
&glyph_extents,
|
||
|
NULL);
|
||
|
if (unlikely (status))
|
||
|
return status;
|
||
|
|
||
|
is_empty = _cairo_rectangle_intersect (&extents, &glyph_extents);
|
||
|
}
|
||
|
|
||
|
return _add_operation (surface, &extents, backend_status);
|
||
|
}
|
||
|
|
||
|
static const cairo_surface_backend_t cairo_analysis_surface_backend = {
|
||
|
CAIRO_INTERNAL_SURFACE_TYPE_ANALYSIS,
|
||
|
NULL, /* create_similar */
|
||
|
_cairo_analysis_surface_finish,
|
||
|
NULL, /* acquire_source_image */
|
||
|
NULL, /* release_source_image */
|
||
|
NULL, /* acquire_dest_image */
|
||
|
NULL, /* release_dest_image */
|
||
|
NULL, /* clone_similar */
|
||
|
NULL, /* composite */
|
||
|
NULL, /* fill_rectangles */
|
||
|
NULL, /* composite_trapezoids */
|
||
|
NULL, /* create_span_renderer */
|
||
|
NULL, /* check_span_renderer */
|
||
|
NULL, /* copy_page */
|
||
|
NULL, /* show_page */
|
||
|
_cairo_analysis_surface_get_extents,
|
||
|
NULL, /* old_show_glyphs */
|
||
|
NULL, /* get_font_options */
|
||
|
NULL, /* flush */
|
||
|
NULL, /* mark_dirty_rectangle */
|
||
|
NULL, /* scaled_font_fini */
|
||
|
NULL, /* scaled_glyph_fini */
|
||
|
_cairo_analysis_surface_paint,
|
||
|
_cairo_analysis_surface_mask,
|
||
|
_cairo_analysis_surface_stroke,
|
||
|
_cairo_analysis_surface_fill,
|
||
|
_cairo_analysis_surface_show_glyphs,
|
||
|
NULL, /* snapshot */
|
||
|
NULL, /* is_similar */
|
||
|
NULL, /* fill_stroke */
|
||
|
NULL, /* create_solid_pattern_surface */
|
||
|
NULL, /* can_repaint_solid_pattern_surface */
|
||
|
_cairo_analysis_surface_has_show_text_glyphs,
|
||
|
_cairo_analysis_surface_show_text_glyphs
|
||
|
};
|
||
|
|
||
|
cairo_surface_t *
|
||
|
_cairo_analysis_surface_create (cairo_surface_t *target)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface;
|
||
|
cairo_status_t status;
|
||
|
|
||
|
status = target->status;
|
||
|
if (unlikely (status))
|
||
|
return _cairo_surface_create_in_error (status);
|
||
|
|
||
|
surface = malloc (sizeof (cairo_analysis_surface_t));
|
||
|
if (unlikely (surface == NULL))
|
||
|
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
|
||
|
|
||
|
/* I believe the content type here is truly arbitrary. I'm quite
|
||
|
* sure nothing will ever use this value. */
|
||
|
_cairo_surface_init (&surface->base,
|
||
|
&cairo_analysis_surface_backend,
|
||
|
NULL, /* device */
|
||
|
CAIRO_CONTENT_COLOR_ALPHA);
|
||
|
|
||
|
cairo_matrix_init_identity (&surface->ctm);
|
||
|
surface->has_ctm = FALSE;
|
||
|
|
||
|
surface->target = cairo_surface_reference (target);
|
||
|
surface->first_op = TRUE;
|
||
|
surface->has_supported = FALSE;
|
||
|
surface->has_unsupported = FALSE;
|
||
|
|
||
|
_cairo_region_init (&surface->supported_region);
|
||
|
_cairo_region_init (&surface->fallback_region);
|
||
|
|
||
|
surface->page_bbox.p1.x = 0;
|
||
|
surface->page_bbox.p1.y = 0;
|
||
|
surface->page_bbox.p2.x = 0;
|
||
|
surface->page_bbox.p2.y = 0;
|
||
|
|
||
|
return &surface->base;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
_cairo_analysis_surface_set_ctm (cairo_surface_t *abstract_surface,
|
||
|
const cairo_matrix_t *ctm)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface;
|
||
|
|
||
|
if (abstract_surface->status)
|
||
|
return;
|
||
|
|
||
|
surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
surface->ctm = *ctm;
|
||
|
surface->has_ctm = ! _cairo_matrix_is_identity (&surface->ctm);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
_cairo_analysis_surface_get_ctm (cairo_surface_t *abstract_surface,
|
||
|
cairo_matrix_t *ctm)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
*ctm = surface->ctm;
|
||
|
}
|
||
|
|
||
|
|
||
|
cairo_region_t *
|
||
|
_cairo_analysis_surface_get_supported (cairo_surface_t *abstract_surface)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
return &surface->supported_region;
|
||
|
}
|
||
|
|
||
|
cairo_region_t *
|
||
|
_cairo_analysis_surface_get_unsupported (cairo_surface_t *abstract_surface)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
return &surface->fallback_region;
|
||
|
}
|
||
|
|
||
|
cairo_bool_t
|
||
|
_cairo_analysis_surface_has_supported (cairo_surface_t *abstract_surface)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
return surface->has_supported;
|
||
|
}
|
||
|
|
||
|
cairo_bool_t
|
||
|
_cairo_analysis_surface_has_unsupported (cairo_surface_t *abstract_surface)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
return surface->has_unsupported;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
_cairo_analysis_surface_get_bounding_box (cairo_surface_t *abstract_surface,
|
||
|
cairo_box_t *bbox)
|
||
|
{
|
||
|
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
|
||
|
|
||
|
*bbox = surface->page_bbox;
|
||
|
}
|
||
|
|
||
|
/* null surface type: a surface that does nothing (has no side effects, yay!) */
|
||
|
|
||
|
static cairo_int_status_t
|
||
|
_return_success (void)
|
||
|
{
|
||
|
return CAIRO_STATUS_SUCCESS;
|
||
|
}
|
||
|
|
||
|
/* These typedefs are just to silence the compiler... */
|
||
|
typedef cairo_int_status_t
|
||
|
(*_paint_func) (void *surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_clip_t *clip);
|
||
|
|
||
|
typedef cairo_int_status_t
|
||
|
(*_mask_func) (void *surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
const cairo_pattern_t *mask,
|
||
|
cairo_clip_t *clip);
|
||
|
|
||
|
typedef cairo_int_status_t
|
||
|
(*_stroke_func) (void *surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_path_fixed_t *path,
|
||
|
const cairo_stroke_style_t *style,
|
||
|
const cairo_matrix_t *ctm,
|
||
|
const cairo_matrix_t *ctm_inverse,
|
||
|
double tolerance,
|
||
|
cairo_antialias_t antialias,
|
||
|
cairo_clip_t *clip);
|
||
|
|
||
|
typedef cairo_int_status_t
|
||
|
(*_fill_func) (void *surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_path_fixed_t *path,
|
||
|
cairo_fill_rule_t fill_rule,
|
||
|
double tolerance,
|
||
|
cairo_antialias_t antialias,
|
||
|
cairo_clip_t *clip);
|
||
|
|
||
|
typedef cairo_int_status_t
|
||
|
(*_show_glyphs_func) (void *surface,
|
||
|
cairo_operator_t op,
|
||
|
const cairo_pattern_t *source,
|
||
|
cairo_glyph_t *glyphs,
|
||
|
int num_glyphs,
|
||
|
cairo_scaled_font_t *scaled_font,
|
||
|
cairo_clip_t *clip,
|
||
|
int *remaining_glyphs);
|
||
|
|
||
|
static const cairo_surface_backend_t cairo_null_surface_backend = {
|
||
|
CAIRO_INTERNAL_SURFACE_TYPE_NULL,
|
||
|
|
||
|
NULL, /* create_similar */
|
||
|
NULL, /* finish */
|
||
|
NULL, /* acquire_source_image */
|
||
|
NULL, /* release_source_image */
|
||
|
NULL, /* acquire_dest_image */
|
||
|
NULL, /* release_dest_image */
|
||
|
NULL, /* clone_similar */
|
||
|
NULL, /* composite */
|
||
|
NULL, /* fill_rectangles */
|
||
|
NULL, /* composite_trapezoids */
|
||
|
NULL, /* create_span_renderer */
|
||
|
NULL, /* check_span_renderer */
|
||
|
NULL, /* copy_page */
|
||
|
NULL, /* show_page */
|
||
|
NULL, /* get_extents */
|
||
|
NULL, /* old_show_glyphs */
|
||
|
NULL, /* get_font_options */
|
||
|
NULL, /* flush */
|
||
|
NULL, /* mark_dirty_rectangle */
|
||
|
NULL, /* scaled_font_fini */
|
||
|
NULL, /* scaled_glyph_fini */
|
||
|
(_paint_func) _return_success, /* paint */
|
||
|
(_mask_func) _return_success, /* mask */
|
||
|
(_stroke_func) _return_success, /* stroke */
|
||
|
(_fill_func) _return_success, /* fill */
|
||
|
(_show_glyphs_func) _return_success, /* show_glyphs */
|
||
|
NULL, /* snapshot */
|
||
|
NULL, /* is_similar */
|
||
|
NULL, /* fill_stroke */
|
||
|
NULL, /* create_solid_pattern_surface */
|
||
|
NULL, /* can_repaint_solid_pattern_surface */
|
||
|
NULL, /* has_show_text_glyphs */
|
||
|
NULL /* show_text_glyphs */
|
||
|
};
|
||
|
|
||
|
cairo_surface_t *
|
||
|
_cairo_null_surface_create (cairo_content_t content)
|
||
|
{
|
||
|
cairo_surface_t *surface;
|
||
|
|
||
|
surface = malloc (sizeof (cairo_surface_t));
|
||
|
if (unlikely (surface == NULL)) {
|
||
|
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
|
||
|
}
|
||
|
|
||
|
_cairo_surface_init (surface,
|
||
|
&cairo_null_surface_backend,
|
||
|
NULL, /* device */
|
||
|
content);
|
||
|
|
||
|
return surface;
|
||
|
}
|