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https://gitlab.freedesktop.org/cairo/cairo.git
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83bfd85a13
Allow a backend to completely reimplement the Cairo API as it wants. The goal is to pass operations to the native backends such as Quartz, Direct2D, Qt, Skia, OpenVG with no overhead. And to permit complete logging contexts, and whatever else the imagination holds. Perhaps to experiment with double-paths? Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
293 lines
9.1 KiB
C
293 lines
9.1 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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*
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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 Red Hat, Inc.
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*
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* Contributor(s):
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* Carl Worth <cworth@cworth.org>
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*/
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/* This isn't a "real" surface, but just something to be used by the
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* test suite to help exercise the paginated-surface paths in cairo.
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*
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* The defining feature of this backend is that it uses a paginated
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* surface to record all operations, and then replays everything to an
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* image surface.
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*
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* It's possible that this code might serve as a good starting point
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* for someone working on bringing up a new paginated-surface-based
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* backend.
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*/
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#include "cairoint.h"
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#include "test-paginated-surface.h"
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#include "cairo-default-context-private.h"
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#include "cairo-error-private.h"
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#include "cairo-paginated-private.h"
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typedef struct _test_paginated_surface {
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cairo_surface_t base;
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cairo_surface_t *target;
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cairo_paginated_mode_t paginated_mode;
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} test_paginated_surface_t;
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static const cairo_surface_backend_t test_paginated_surface_backend;
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static const cairo_paginated_surface_backend_t test_paginated_surface_paginated_backend;
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cairo_surface_t *
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_cairo_test_paginated_surface_create (cairo_surface_t *target)
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{
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cairo_status_t status;
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cairo_surface_t *paginated;
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test_paginated_surface_t *surface;
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status = cairo_surface_status (target);
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if (unlikely (status))
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return _cairo_surface_create_in_error (status);
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surface = malloc (sizeof (test_paginated_surface_t));
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if (unlikely (surface == NULL))
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return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
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_cairo_surface_init (&surface->base,
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&test_paginated_surface_backend,
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NULL, /* device */
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target->content);
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surface->target = cairo_surface_reference (target);
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paginated = _cairo_paginated_surface_create (&surface->base,
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target->content,
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&test_paginated_surface_paginated_backend);
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status = paginated->status;
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if (status == CAIRO_STATUS_SUCCESS) {
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/* paginated keeps the only reference to surface now, drop ours */
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cairo_surface_destroy (&surface->base);
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return paginated;
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}
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cairo_surface_destroy (target);
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free (surface);
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return _cairo_surface_create_in_error (status);
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}
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static cairo_status_t
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_test_paginated_surface_finish (void *abstract_surface)
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{
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test_paginated_surface_t *surface = abstract_surface;
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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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_test_paginated_surface_get_extents (void *abstract_surface,
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cairo_rectangle_int_t *rectangle)
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{
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test_paginated_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 cairo_int_status_t
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_test_paginated_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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test_paginated_surface_t *surface = abstract_surface;
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if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
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return CAIRO_STATUS_SUCCESS;
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return _cairo_surface_paint (surface->target, op, source, clip);
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}
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static cairo_int_status_t
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_test_paginated_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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test_paginated_surface_t *surface = abstract_surface;
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if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
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return CAIRO_STATUS_SUCCESS;
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return _cairo_surface_mask (surface->target,
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op, source, mask, clip);
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}
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static cairo_int_status_t
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_test_paginated_surface_stroke (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_path_fixed_t *path,
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const cairo_stroke_style_t *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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test_paginated_surface_t *surface = abstract_surface;
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if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
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return CAIRO_STATUS_SUCCESS;
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return _cairo_surface_stroke (surface->target, op, source,
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path, style,
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ctm, ctm_inverse,
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tolerance, antialias,
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clip);
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}
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static cairo_int_status_t
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_test_paginated_surface_fill (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_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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test_paginated_surface_t *surface = abstract_surface;
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if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
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return CAIRO_STATUS_SUCCESS;
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return _cairo_surface_fill (surface->target, op, source,
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path, fill_rule,
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tolerance, antialias,
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clip);
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}
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static cairo_bool_t
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_test_paginated_surface_has_show_text_glyphs (void *abstract_surface)
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{
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test_paginated_surface_t *surface = abstract_surface;
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return cairo_surface_has_show_text_glyphs (surface->target);
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}
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static cairo_int_status_t
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_test_paginated_surface_show_text_glyphs (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 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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test_paginated_surface_t *surface = abstract_surface;
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if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
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return CAIRO_STATUS_SUCCESS;
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return _cairo_surface_show_text_glyphs (surface->target, op, source,
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utf8, utf8_len,
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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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clip);
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}
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static void
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_test_paginated_surface_set_paginated_mode (void *abstract_surface,
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cairo_paginated_mode_t mode)
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{
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test_paginated_surface_t *surface = abstract_surface;
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surface->paginated_mode = mode;
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}
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static const cairo_surface_backend_t test_paginated_surface_backend = {
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CAIRO_INTERNAL_SURFACE_TYPE_TEST_PAGINATED,
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_cairo_default_context_create,
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/* Since we are a paginated user, we get to regard most of the
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* surface backend interface as historical cruft and ignore it. */
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NULL, /* create_similar */
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_test_paginated_surface_finish,
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NULL, /* acquire_source_image */
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NULL, /* release_source_image */
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NULL, /* acquire_dest_image */
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NULL, /* release_dest_image */
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NULL, /* clone_similar */
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NULL, /* composite */
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NULL, /* fill_rectangles */
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NULL, /* composite_trapezoids */
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NULL, /* create_span_renderer */
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NULL, /* check_span_renderer */
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NULL, /* copy_page */
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NULL, /* show_page */
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_test_paginated_surface_get_extents,
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NULL, /* old_show_glyphs */
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NULL, /* get_font_options */
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NULL, /* flush */
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NULL, /* mark_dirty_rectangle */
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NULL, /* scaled_font_fini */
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NULL, /* scaled_glyph_fini */
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/* Here is the more "modern" section of the surface backend
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* interface which is mostly just drawing functions */
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_test_paginated_surface_paint,
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_test_paginated_surface_mask,
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_test_paginated_surface_stroke,
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_test_paginated_surface_fill,
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NULL, /* replaced by show_text_glyphs */
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NULL, /* snapshot */
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NULL, /* is_similar */
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NULL, /* fill_stroke */
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NULL, /* create_solid_pattern_surface */
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NULL, /* can_repaint_solid_pattern_surface */
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_test_paginated_surface_has_show_text_glyphs,
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_test_paginated_surface_show_text_glyphs
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};
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static const cairo_paginated_surface_backend_t test_paginated_surface_paginated_backend = {
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NULL, /* start_page */
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_test_paginated_surface_set_paginated_mode
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};
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