| /* |
| * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.java2d.marlin; |
| |
| final class DPathSimplifier implements DPathConsumer2D { |
| |
| // distance threshold in pixels (device) |
| private static final double PIX_THRESHOLD = MarlinProperties.getPathSimplifierPixelTolerance(); |
| |
| private static final double SQUARE_TOLERANCE = PIX_THRESHOLD * PIX_THRESHOLD; |
| |
| // members: |
| private DPathConsumer2D delegate; |
| private double cx, cy; |
| |
| DPathSimplifier() { |
| } |
| |
| DPathSimplifier init(final DPathConsumer2D delegate) { |
| this.delegate = delegate; |
| return this; // fluent API |
| } |
| |
| @Override |
| public void pathDone() { |
| delegate.pathDone(); |
| } |
| |
| @Override |
| public void closePath() { |
| delegate.closePath(); |
| } |
| |
| @Override |
| public long getNativeConsumer() { |
| return 0; |
| } |
| |
| @Override |
| public void quadTo(final double x1, final double y1, |
| final double xe, final double ye) |
| { |
| // Test if curve is too small: |
| double dx = (xe - cx); |
| double dy = (ye - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| // check control points P1: |
| dx = (x1 - cx); |
| dy = (y1 - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| return; |
| } |
| } |
| delegate.quadTo(x1, y1, xe, ye); |
| // final end point: |
| cx = xe; |
| cy = ye; |
| } |
| |
| @Override |
| public void curveTo(final double x1, final double y1, |
| final double x2, final double y2, |
| final double xe, final double ye) |
| { |
| // Test if curve is too small: |
| double dx = (xe - cx); |
| double dy = (ye - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| // check control points P1: |
| dx = (x1 - cx); |
| dy = (y1 - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| // check control points P2: |
| dx = (x2 - cx); |
| dy = (y2 - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| return; |
| } |
| } |
| } |
| delegate.curveTo(x1, y1, x2, y2, xe, ye); |
| // final end point: |
| cx = xe; |
| cy = ye; |
| } |
| |
| @Override |
| public void moveTo(final double xe, final double ye) { |
| delegate.moveTo(xe, ye); |
| // starting point: |
| cx = xe; |
| cy = ye; |
| } |
| |
| @Override |
| public void lineTo(final double xe, final double ye) { |
| // Test if segment is too small: |
| double dx = (xe - cx); |
| double dy = (ye - cy); |
| |
| if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) { |
| return; |
| } |
| delegate.lineTo(xe, ye); |
| // final end point: |
| cx = xe; |
| cy = ye; |
| } |
| } |