mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2026-05-24 22:58:11 +02:00
cfd204824f
As a simple step to ensure that we do not inadvertently modify (or at least generate compiler warns if we try) user data, mark the incoming style and matrices as constant.
543 lines
15 KiB
C
543 lines
15 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2005 Red Hat, Inc
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* Copyright © 2007 Adrian Johnson
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* Copyright © 2009 Chris Wilson
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 Red Hat, Inc.
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*
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* Contributor(s):
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* Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#include "cairoint.h"
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#include "cairo-error-private.h"
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#include "cairo-surface-wrapper-private.h"
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/* A collection of routines to facilitate surface wrapping */
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static void
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_copy_transformed_pattern (cairo_pattern_t *pattern,
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const cairo_pattern_t *original,
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const cairo_matrix_t *ctm_inverse)
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{
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_cairo_pattern_init_static_copy (pattern, original);
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/* apply device_transform first so that it is transformed by ctm_inverse */
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if (original->type == CAIRO_PATTERN_TYPE_SURFACE) {
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cairo_surface_pattern_t *surface_pattern;
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cairo_surface_t *surface;
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surface_pattern = (cairo_surface_pattern_t *) original;
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surface = surface_pattern->surface;
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if (_cairo_surface_has_device_transform (surface))
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_cairo_pattern_transform (pattern, &surface->device_transform);
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}
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if (! _cairo_matrix_is_identity (ctm_inverse))
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_cairo_pattern_transform (pattern, ctm_inverse);
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}
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static cairo_bool_t
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_cairo_surface_wrapper_needs_device_transform (cairo_surface_wrapper_t *wrapper,
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cairo_matrix_t *matrix)
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{
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if (_cairo_matrix_is_identity (&wrapper->target->device_transform))
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return FALSE;
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*matrix = wrapper->target->device_transform;
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return TRUE;
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}
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cairo_status_t
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_cairo_surface_wrapper_acquire_source_image (cairo_surface_wrapper_t *wrapper,
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cairo_image_surface_t **image_out,
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void **image_extra)
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{
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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return _cairo_surface_acquire_source_image (wrapper->target,
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image_out, image_extra);
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}
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void
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_cairo_surface_wrapper_release_source_image (cairo_surface_wrapper_t *wrapper,
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cairo_image_surface_t *image,
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void *image_extra)
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{
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_cairo_surface_release_source_image (wrapper->target, image, image_extra);
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}
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cairo_status_t
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_cairo_surface_wrapper_paint (cairo_surface_wrapper_t *wrapper,
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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_status_t status;
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cairo_matrix_t device_transform;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_pattern_union_t source_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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if (clip != NULL) {
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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} else {
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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dev_clip = &clip_copy;
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_copy_transformed_pattern (&source_copy.base, source, &device_transform);
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source = &source_copy.base;
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}
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status = _cairo_surface_paint (wrapper->target, op, source, dev_clip);
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FINISH:
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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return status;
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}
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cairo_status_t
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_cairo_surface_wrapper_mask (cairo_surface_wrapper_t *wrapper,
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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_status_t status;
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cairo_matrix_t device_transform;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_pattern_union_t source_copy;
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cairo_pattern_union_t mask_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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if (clip != NULL) {
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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} else {
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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dev_clip = &clip_copy;
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_copy_transformed_pattern (&source_copy.base, source, &device_transform);
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source = &source_copy.base;
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_copy_transformed_pattern (&mask_copy.base, mask, &device_transform);
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mask = &mask_copy.base;
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}
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status = _cairo_surface_mask (wrapper->target, op, source, mask, dev_clip);
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FINISH:
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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return status;
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}
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cairo_status_t
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_cairo_surface_wrapper_stroke (cairo_surface_wrapper_t *wrapper,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_path_fixed_t *path,
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const cairo_stroke_style_t *stroke_style,
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const cairo_matrix_t *ctm,
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const cairo_matrix_t *ctm_inverse,
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double tolerance,
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cairo_antialias_t antialias,
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cairo_clip_t *clip)
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{
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cairo_status_t status;
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cairo_matrix_t device_transform;
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cairo_path_fixed_t path_copy, *dev_path = path;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_matrix_t dev_ctm = *ctm;
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cairo_matrix_t dev_ctm_inverse = *ctm_inverse;
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cairo_pattern_union_t source_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
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if (unlikely (status))
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goto FINISH;
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_cairo_path_fixed_transform (&path_copy, &device_transform);
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dev_path = &path_copy;
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if (clip != NULL) {
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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dev_clip = &clip_copy;
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}
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cairo_matrix_multiply (&dev_ctm, &dev_ctm, &device_transform);
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status = cairo_matrix_invert (&device_transform);
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assert (status == CAIRO_STATUS_SUCCESS);
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cairo_matrix_multiply (&dev_ctm_inverse,
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&device_transform,
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&dev_ctm_inverse);
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_copy_transformed_pattern (&source_copy.base, source, &device_transform);
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source = &source_copy.base;
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} else {
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if (clip != NULL) {
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dev_clip = &clip_copy;
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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}
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status = _cairo_surface_stroke (wrapper->target, op, source,
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dev_path, stroke_style,
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&dev_ctm, &dev_ctm_inverse,
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tolerance, antialias,
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dev_clip);
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FINISH:
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if (dev_path != path)
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_cairo_path_fixed_fini (dev_path);
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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return status;
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}
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cairo_status_t
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_cairo_surface_wrapper_fill_stroke (cairo_surface_wrapper_t *wrapper,
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cairo_operator_t fill_op,
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const cairo_pattern_t *fill_source,
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cairo_fill_rule_t fill_rule,
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double fill_tolerance,
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cairo_antialias_t fill_antialias,
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cairo_path_fixed_t *path,
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cairo_operator_t stroke_op,
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const cairo_pattern_t *stroke_source,
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const cairo_stroke_style_t *stroke_style,
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const cairo_matrix_t *stroke_ctm,
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const cairo_matrix_t *stroke_ctm_inverse,
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double stroke_tolerance,
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cairo_antialias_t stroke_antialias,
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cairo_clip_t *clip)
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{
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cairo_status_t status;
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cairo_matrix_t device_transform;
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cairo_path_fixed_t path_copy, *dev_path = path;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_matrix_t dev_ctm = *stroke_ctm;
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cairo_matrix_t dev_ctm_inverse = *stroke_ctm_inverse;
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cairo_pattern_union_t stroke_source_copy;
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cairo_pattern_union_t fill_source_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
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if (unlikely (status))
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goto FINISH;
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_cairo_path_fixed_transform (&path_copy, &device_transform);
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dev_path = &path_copy;
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if (clip != NULL) {
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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dev_clip = &clip_copy;
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}
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cairo_matrix_multiply (&dev_ctm, &dev_ctm, &device_transform);
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status = cairo_matrix_invert (&device_transform);
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assert (status == CAIRO_STATUS_SUCCESS);
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cairo_matrix_multiply (&dev_ctm_inverse,
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&device_transform,
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&dev_ctm_inverse);
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_copy_transformed_pattern (&stroke_source_copy.base, stroke_source, &device_transform);
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stroke_source = &stroke_source_copy.base;
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_copy_transformed_pattern (&fill_source_copy.base, fill_source, &device_transform);
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fill_source = &fill_source_copy.base;
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} else {
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if (clip != NULL) {
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dev_clip = &clip_copy;
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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}
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status = _cairo_surface_fill_stroke (wrapper->target,
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fill_op, fill_source, fill_rule,
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fill_tolerance, fill_antialias,
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dev_path,
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stroke_op, stroke_source,
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stroke_style,
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&dev_ctm, &dev_ctm_inverse,
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stroke_tolerance, stroke_antialias,
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dev_clip);
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FINISH:
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if (dev_path != path)
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_cairo_path_fixed_fini (dev_path);
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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return status;
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}
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cairo_status_t
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_cairo_surface_wrapper_fill (cairo_surface_wrapper_t *wrapper,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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cairo_path_fixed_t *path,
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cairo_fill_rule_t fill_rule,
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double tolerance,
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cairo_antialias_t antialias,
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cairo_clip_t *clip)
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{
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cairo_status_t status;
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cairo_matrix_t device_transform;
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cairo_path_fixed_t path_copy, *dev_path = path;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_pattern_union_t source_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
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if (unlikely (status))
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goto FINISH;
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_cairo_path_fixed_transform (&path_copy, &device_transform);
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dev_path = &path_copy;
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if (clip != NULL) {
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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dev_clip = &clip_copy;
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}
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_copy_transformed_pattern (&source_copy.base, source, &device_transform);
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source = &source_copy.base;
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} else {
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if (clip != NULL) {
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dev_clip = &clip_copy;
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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}
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status = _cairo_surface_fill (wrapper->target, op, source,
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dev_path, fill_rule,
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tolerance, antialias,
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dev_clip);
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FINISH:
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if (dev_path != path)
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_cairo_path_fixed_fini (dev_path);
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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return status;
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}
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cairo_status_t
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_cairo_surface_wrapper_show_text_glyphs (cairo_surface_wrapper_t *wrapper,
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cairo_operator_t op,
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const cairo_pattern_t *source,
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const char *utf8,
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int utf8_len,
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cairo_glyph_t *glyphs,
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int num_glyphs,
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const cairo_text_cluster_t *clusters,
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int num_clusters,
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cairo_text_cluster_flags_t cluster_flags,
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cairo_scaled_font_t *scaled_font,
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cairo_clip_t *clip)
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{
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cairo_status_t status;
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cairo_matrix_t device_transform;
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cairo_clip_t clip_copy, *dev_clip = clip;
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cairo_glyph_t *dev_glyphs = glyphs;
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cairo_pattern_union_t source_copy;
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if (unlikely (wrapper->target->status))
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return wrapper->target->status;
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if (glyphs == NULL || num_glyphs == 0)
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return CAIRO_STATUS_SUCCESS;
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if (clip && clip->all_clipped)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_wrapper_needs_device_transform (wrapper,
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&device_transform))
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{
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int i;
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if (clip != NULL) {
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dev_clip = &clip_copy;
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status = _cairo_clip_init_copy_transformed (&clip_copy, clip,
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&device_transform);
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if (unlikely (status))
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goto FINISH;
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}
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dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
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if (dev_glyphs == NULL) {
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status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
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goto FINISH;
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}
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for (i = 0; i < num_glyphs; i++) {
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dev_glyphs[i] = glyphs[i];
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cairo_matrix_transform_point (&device_transform,
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&dev_glyphs[i].x,
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&dev_glyphs[i].y);
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}
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_copy_transformed_pattern (&source_copy.base, source, &device_transform);
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source = &source_copy.base;
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} else {
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if (clip != NULL) {
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dev_clip = &clip_copy;
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_cairo_clip_init_copy (&clip_copy, clip);
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}
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}
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status = _cairo_surface_show_text_glyphs (wrapper->target, op, source,
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utf8, utf8_len,
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dev_glyphs, num_glyphs,
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clusters, num_clusters,
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cluster_flags,
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scaled_font,
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dev_clip);
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FINISH:
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if (dev_clip != clip)
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_cairo_clip_reset (dev_clip);
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if (dev_glyphs != glyphs)
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free (dev_glyphs);
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return status;
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}
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cairo_surface_t *
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_cairo_surface_wrapper_create_similar (cairo_surface_wrapper_t *wrapper,
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cairo_content_t content,
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int width,
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int height)
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{
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return _cairo_surface_create_similar_scratch (wrapper->target,
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content, width, height);
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}
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cairo_bool_t
|
|
_cairo_surface_wrapper_get_extents (cairo_surface_wrapper_t *wrapper,
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|
cairo_rectangle_int_t *extents)
|
|
{
|
|
return _cairo_surface_get_extents (wrapper->target, extents);
|
|
}
|
|
|
|
void
|
|
_cairo_surface_wrapper_get_font_options (cairo_surface_wrapper_t *wrapper,
|
|
cairo_font_options_t *options)
|
|
{
|
|
cairo_surface_get_font_options (wrapper->target, options);
|
|
}
|
|
|
|
cairo_surface_t *
|
|
_cairo_surface_wrapper_snapshot (cairo_surface_wrapper_t *wrapper)
|
|
{
|
|
return _cairo_surface_snapshot (wrapper->target);
|
|
}
|
|
|
|
cairo_bool_t
|
|
_cairo_surface_wrapper_has_show_text_glyphs (cairo_surface_wrapper_t *wrapper)
|
|
{
|
|
return cairo_surface_has_show_text_glyphs (wrapper->target);
|
|
}
|
|
|
|
void
|
|
_cairo_surface_wrapper_init (cairo_surface_wrapper_t *wrapper,
|
|
cairo_surface_t *target)
|
|
{
|
|
wrapper->target = cairo_surface_reference (target);
|
|
}
|
|
|
|
void
|
|
_cairo_surface_wrapper_fini (cairo_surface_wrapper_t *wrapper)
|
|
{
|
|
cairo_surface_destroy (wrapper->target);
|
|
}
|