JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2015, 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
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 */

package sun.java2d.marlin;

/**
 * Marlin constant holder using System properties
 */
interface MarlinConst {
    // enable Logs (logger or stdout)
    static final boolean ENABLE_LOGS = MarlinProperties.isLoggingEnabled();
    // use Logger instead of stdout
    static final boolean USE_LOGGER = ENABLE_LOGS && MarlinProperties.isUseLogger();

    // log new RendererContext
    static final boolean LOG_CREATE_CONTEXT = ENABLE_LOGS
        && MarlinProperties.isLogCreateContext();
    // log misc.Unsafe alloc/realloc/free
    static final boolean LOG_UNSAFE_MALLOC = ENABLE_LOGS
        && MarlinProperties.isLogUnsafeMalloc();
    // do check unsafe alignment:
    static final boolean DO_CHECK_UNSAFE = false;

    // do statistics
    static final boolean DO_STATS = ENABLE_LOGS && MarlinProperties.isDoStats();
    // do monitors
    // disabled to reduce byte-code size a bit...
    static final boolean DO_MONITORS = false;
//    static final boolean DO_MONITORS = ENABLE_LOGS && MarlinProperties.isDoMonitors();
    // do checks
    static final boolean DO_CHECKS = ENABLE_LOGS && MarlinProperties.isDoChecks();

    // do AA range checks: disable when algorithm / code is stable
    static final boolean DO_AA_RANGE_CHECK = false;

    // enable logs
    static final boolean DO_LOG_WIDEN_ARRAY = ENABLE_LOGS && false;
    // enable oversize logs
    static final boolean DO_LOG_OVERSIZE = ENABLE_LOGS && false;
    // enable traces
    static final boolean DO_TRACE = ENABLE_LOGS && false;

    // do flush stats
    static final boolean DO_FLUSH_STATS = true;
    // do flush monitors
    static final boolean DO_FLUSH_MONITORS = true;
    // use one polling thread to dump statistics/monitors
    static final boolean USE_DUMP_THREAD = false;
    // thread dump interval (ms)
    static final long DUMP_INTERVAL = 5000L;

    // do clean dirty array
    static final boolean DO_CLEAN_DIRTY = false;

    // flag to use collinear simplifier
    static final boolean USE_SIMPLIFIER = MarlinProperties.isUseSimplifier();

    // flag to use path simplifier
    static final boolean USE_PATH_SIMPLIFIER = MarlinProperties.isUsePathSimplifier();

    static final boolean DO_CLIP_SUBDIVIDER = MarlinProperties.isDoClipSubdivider();

    // flag to enable logs related to bounds checks
    static final boolean DO_LOG_BOUNDS = ENABLE_LOGS && false;

    // flag to enable logs related to clip rect
    static final boolean DO_LOG_CLIP = ENABLE_LOGS && false;

    // Initial Array sizing (initial context capacity) ~ 450K

    // 4096 pixels (width) for initial capacity
    static final int INITIAL_PIXEL_WIDTH
        = MarlinProperties.getInitialPixelWidth();
    // 2176 pixels (height) for initial capacity
    static final int INITIAL_PIXEL_HEIGHT
        = MarlinProperties.getInitialPixelHeight();

    // typical array sizes: only odd numbers allowed below
    static final int INITIAL_ARRAY        = 256;

    // alpha row dimension
    static final int INITIAL_AA_ARRAY     = INITIAL_PIXEL_WIDTH;

    // 4096 edges for initial capacity
    static final int INITIAL_EDGES_COUNT = MarlinProperties.getInitialEdges();

    // initial edges = edges count (4096)
    // 6 ints per edges = 24 bytes
    // edges capacity = 24 x initial edges = 24 * edges count (4096) = 96K
    static final int INITIAL_EDGES_CAPACITY = INITIAL_EDGES_COUNT * 24;

    // zero value as byte
    static final byte BYTE_0 = (byte) 0;

    // subpixels expressed as log2
    public static final int SUBPIXEL_LG_POSITIONS_X
        = MarlinProperties.getSubPixel_Log2_X();
    public static final int SUBPIXEL_LG_POSITIONS_Y
        = MarlinProperties.getSubPixel_Log2_Y();

    public static final int MIN_SUBPIXEL_LG_POSITIONS
        = Math.min(SUBPIXEL_LG_POSITIONS_X, SUBPIXEL_LG_POSITIONS_Y);

    // number of subpixels
    public static final int SUBPIXEL_POSITIONS_X = 1 << (SUBPIXEL_LG_POSITIONS_X);
    public static final int SUBPIXEL_POSITIONS_Y = 1 << (SUBPIXEL_LG_POSITIONS_Y);

    public static final float MIN_SUBPIXELS = 1 << MIN_SUBPIXEL_LG_POSITIONS;

    public static final int MAX_AA_ALPHA
        = (SUBPIXEL_POSITIONS_X * SUBPIXEL_POSITIONS_Y);

    public static final int TILE_H_LG = MarlinProperties.getTileSize_Log2();
    public static final int TILE_H = 1 << TILE_H_LG; // 32 by default

    public static final int TILE_W_LG = MarlinProperties.getTileWidth_Log2();
    public static final int TILE_W = 1 << TILE_W_LG; // 32 by default

    public static final int BLOCK_SIZE_LG = MarlinProperties.getBlockSize_Log2();
    public static final int BLOCK_SIZE    = 1 << BLOCK_SIZE_LG;

    // Constants
    public static final int WIND_EVEN_ODD = 0;
    public static final int WIND_NON_ZERO = 1;

    /**
     * Constant value for join style.
     */
    public static final int JOIN_MITER = 0;

    /**
     * Constant value for join style.
     */
    public static final int JOIN_ROUND = 1;

    /**
     * Constant value for join style.
     */
    public static final int JOIN_BEVEL = 2;

    /**

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