SmoothingRenderer.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * JXClient 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff
 * Copyright (C) 2006-2017,2019-2023 Andreas Kirschbaum
 * Copyright (C) 2010-2012,2014-2018,2020-2023 Nicolas Weeger
 */
 
package com.realtime.crossfire.jxclient.gui.map;
 
import com.realtime.crossfire.jxclient.faces.Face;
import com.realtime.crossfire.jxclient.faces.FacesProvider;
import com.realtime.crossfire.jxclient.faces.SmoothFaces;
import com.realtime.crossfire.jxclient.map.CfMap;
import com.realtime.crossfire.jxclient.map.CfMapSquare;
import java.awt.Graphics;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.swing.ImageIcon;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
 
public class SmoothingRenderer {
 
    private static final int BORDER_WEST = 1;
 
    private static final int BORDER_NORTH = 2;
 
    private static final int BORDER_EAST = 4;
 
    private static final int BORDER_SOUTH = 8;
 
    private static final int CORNER_NORTHWEST = 1;
 
    private static final int CORNER_NORTHEAST = 2;
 
    private static final int CORNER_SOUTHEAST = 4;
 
    private static final int CORNER_SOUTHWEST = 8;
 
    private static final int @NotNull [] DX = {1, 2, 2, 2, 1, 0, 0, 0,};
 
    private static final int @NotNull [] DY = {0, 0, 1, 2, 2, 2, 1, 0,};
 
    private static final int @NotNull [] BORDER_WEIGHT = {BORDER_NORTH, 0, BORDER_EAST, 0, BORDER_SOUTH, 0, BORDER_WEST, 0,};
 
    private static final int @NotNull [] CORNER_WEIGHT = {0, CORNER_NORTHEAST, 0, CORNER_SOUTHEAST, 0, CORNER_SOUTHWEST, 0, CORNER_NORTHWEST,};
 
    private static final int @NotNull [] BORDER_CORNER_EXCLUDE = {CORNER_NORTHWEST|CORNER_NORTHEAST, 0, CORNER_NORTHEAST|CORNER_SOUTHEAST, 0, CORNER_SOUTHEAST|CORNER_SOUTHWEST, 0, CORNER_SOUTHWEST|CORNER_NORTHWEST, 0};
 
    @NotNull
    private final SmoothFaces smoothFaces;
 
    @NotNull
    private final FacesProvider facesProvider;
 
    @Nullable
    private final CfMapSquare @NotNull [] @NotNull [] layerNode = new CfMapSquare[3][3];
 
    private final int @NotNull [] smoothValue = new int[8];
 
    private final int @NotNull [] smoothFace = new int[8];
 
    private final boolean @NotNull [] done = new boolean[8];
 
    @NotNull
    private final AtomicBoolean isUnknownImage = new AtomicBoolean();
 
    protected SmoothingRenderer(@NotNull final SmoothFaces smoothFaces, @NotNull final FacesProvider facesProvider) {
        this.smoothFaces = smoothFaces;
        this.facesProvider = facesProvider;
    }
 
    public void paintSmooth(@NotNull final Graphics graphics, final int x, final int y, final int px, final int py, final int layer, @NotNull final CfMap map, final int tileSize) {
        for (int deltaX = 0; deltaX <= 2; deltaX++) {
            for (int deltaY = 0; deltaY <= 2; deltaY++) {
                if (deltaX != 1 || deltaY != 1) {
                    final CfMapSquare mapSquare = map.getMapSquare(x+deltaX-1, y+deltaY-1);
                    //noinspection AssignmentToNull,ConstantConditions
                    layerNode[deltaX][deltaY] = mapSquare.getSmooth(layer) > 0 ? mapSquare : null;
                }
            }
        }
 
        final int level = map.getSmooth(x, y, layer);
 
        for (int i = 0; i < 8; i++) {
            final CfMapSquare node = layerNode[DX[i]][DY[i]];
            //noinspection ConstantConditions
            if (node == null) {
                smoothValue[i] = 0;
                smoothFace[i] = 0;
            } else {
                final int smoothlevel = node.getSmooth(layer);
                if (smoothlevel <= level) {
                    smoothValue[i] = 0;
                    smoothFace[i] = 0;
                } else {
                    smoothValue[i] = smoothlevel;
                    final Face nodeFace = node.getFace(layer);
                    smoothFace[i] = nodeFace == null ? 0 : smoothFaces.getSmoothFace(nodeFace.getFaceNum());
                }
            }
        }
 
        // Now we have a list of smoothlevel higher than current square. There
        // are at most 8 different levels. so... let's check 8 times for the
        // lowest one (we draw from bottom to top!).
        Arrays.fill(done, false);
        while (true) {
            int lowest = -1;
            for (int i = 0; i < 8; i++) {
                if (smoothValue[i] > 0 && !done[i] && (lowest < 0 || smoothValue[i] < smoothValue[lowest])) {
                    lowest = i;
                }
            }
            if (lowest < 0) {
                // No more smooth to do on this square here we know 'what' to
                // smooth.
                break;
            }
            final int currentSmoothFace = smoothFace[lowest];
            // We need to calculate the weight for border and weight for
            // corners. Then we 'mark done' the corresponding squares.
            // First, the border, which may exclude some corners.
            int weight = 0;
            int weightC = 15;
            for (int i = 0; i < 8; i++) {
                if (smoothValue[i] == smoothValue[lowest] && smoothFace[i] == currentSmoothFace) {
                    done[i] = true;
                    weight |= BORDER_WEIGHT[i];
                    weightC &= ~BORDER_CORNER_EXCLUDE[i];
                } else {
                    weightC &= ~CORNER_WEIGHT[i];
                }
            }
            if (currentSmoothFace == 0) {
                continue;
            }
 
            final ImageIcon imageIcon = facesProvider.getImageIcon(currentSmoothFace, isUnknownImage);
            if (isUnknownImage.get()) {
                map.squarePendingFace(x, y, currentSmoothFace);
            } else {
                if (weight != 0) {
                    drawImage(graphics, px, py, tileSize*weight, 0, imageIcon, tileSize);
                }
                if (weightC != 0) {
                    drawImage(graphics, px, py, tileSize*weightC, tileSize, imageIcon, tileSize);
                }
            }
        }
    }
 
    private static void drawImage(@NotNull final Graphics graphics, final int dstX, final int dstY, final int srcX, final int srcY, @NotNull final ImageIcon imageIcon, final int tileSize) {
        graphics.drawImage(imageIcon.getImage(), dstX, dstY, dstX+tileSize, dstY+tileSize, srcX, srcY, srcX+tileSize, srcY+tileSize, null);
    }
 
}