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ba531642f7
This custom stroking code allows backends to use optimized region-based drawing operations for rectilinear strokes. This results in a 5-25x performance improvement when drawing rectilinear shapes: image-rgb box-outline-stroke-100 0.18 -> 0.01: 25.58x speedup ████████████████████████▋ image-rgba box-outline-stroke-100 0.18 -> 0.01: 25.57x speedup ████████████████████████▋ xlib-rgb box-outline-stroke-100 0.49 -> 0.06: 8.67x speedup ███████▋ xlib-rgba box-outline-stroke-100 0.22 -> 0.04: 5.39x speedup ████▍ In other words, using cairo_stroke instead of cairo_fill to draw the same shape was 5-15x slower before, but is 1.2-2x faster now.
75 lines
2.5 KiB
C
75 lines
2.5 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., 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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* Carl D. Worth <cworth@redhat.com>
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*/
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#ifndef CAIRO_PATH_FIXED_PRIVATE_H
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#define CAIRO_PATH_FIXED_PRIVATE_H
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typedef enum cairo_path_op {
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CAIRO_PATH_OP_MOVE_TO = 0,
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CAIRO_PATH_OP_LINE_TO = 1,
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CAIRO_PATH_OP_CURVE_TO = 2,
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CAIRO_PATH_OP_CLOSE_PATH = 3
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} __attribute__ ((packed)) cairo_path_op_t; /* Don't want 32 bits if we can avoid it. */
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#define CAIRO_PATH_BUF_SIZE 64
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typedef struct _cairo_path_op_buf {
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int num_ops;
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cairo_path_op_t op[CAIRO_PATH_BUF_SIZE];
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struct _cairo_path_op_buf *next, *prev;
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} cairo_path_op_buf_t;
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typedef struct _cairo_path_arg_buf {
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int num_points;
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cairo_point_t points[CAIRO_PATH_BUF_SIZE];
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struct _cairo_path_arg_buf *next, *prev;
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} cairo_path_arg_buf_t;
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struct _cairo_path_fixed {
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cairo_path_op_buf_t *op_buf_head;
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cairo_path_op_buf_t *op_buf_tail;
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cairo_path_arg_buf_t *arg_buf_head;
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cairo_path_arg_buf_t *arg_buf_tail;
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cairo_point_t last_move_point;
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cairo_point_t current_point;
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unsigned int has_current_point : 1;
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unsigned int has_curve_to : 1;
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};
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#endif /* CAIRO_PATH_FIXED_PRIVATE_H */
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