直接以 data 的方法绘制地图像素画，这样实现的好处就是即使插件卸载，也可以继续显示地图像素画
游戏的每一张地图数据都会保存在world/data/map_x.dat下，最大地图ID会保存在world/data/idcounts.dat下
地图数据的colors是一个大小为16384的字节数组，代表了128*128内每个点的颜色数据
游戏原版有这些颜色可供选择
public static final MapColor CLEAR = new MapColor(0, 0);
public static final MapColor PALE_GREEN = new MapColor(1, 8368696);
public static final MapColor PALE_YELLOW = new MapColor(2, 16247203);
public static final MapColor WHITE_GRAY = new MapColor(3, 0xC7C7C7);
public static final MapColor BRIGHT_RED = new MapColor(4, 0xFF0000);
public static final MapColor PALE_PURPLE = new MapColor(5, 0xA0A0FF);
public static final MapColor IRON_GRAY = new MapColor(6, 0xA7A7A7);
public static final MapColor DARK_GREEN = new MapColor(7, 31744);
public static final MapColor WHITE = new MapColor(8, 0xFFFFFF);
public static final MapColor LIGHT_BLUE_GRAY = new MapColor(9, 10791096);
public static final MapColor DIRT_BROWN = new MapColor(10, 9923917);
public static final MapColor STONE_GRAY = new MapColor(11, 0x707070);
public static final MapColor WATER_BLUE = new MapColor(12, 0x4040FF);
public static final MapColor OAK_TAN = new MapColor(13, 9402184);
public static final MapColor OFF_WHITE = new MapColor(14, 0xFFFCF5);
public static final MapColor ORANGE = new MapColor(15, 14188339);
public static final MapColor MAGENTA = new MapColor(16, 11685080);
public static final MapColor LIGHT_BLUE = new MapColor(17, 6724056);
public static final MapColor YELLOW = new MapColor(18, 0xE5E533);
public static final MapColor LIME = new MapColor(19, 8375321);
public static final MapColor PINK = new MapColor(20, 15892389);
public static final MapColor GRAY = new MapColor(21, 0x4C4C4C);
public static final MapColor LIGHT_GRAY = new MapColor(22, 0x999999);
public static final MapColor CYAN = new MapColor(23, 5013401);
public static final MapColor PURPLE = new MapColor(24, 8339378);
public static final MapColor BLUE = new MapColor(25, 3361970);
public static final MapColor BROWN = new MapColor(26, 6704179);
public static final MapColor GREEN = new MapColor(27, 6717235);
public static final MapColor RED = new MapColor(28, 0x993333);
public static final MapColor BLACK = new MapColor(29, 0x191919);
public static final MapColor GOLD = new MapColor(30, 16445005);
public static final MapColor DIAMOND_BLUE = new MapColor(31, 6085589);
public static final MapColor LAPIS_BLUE = new MapColor(32, 4882687);
public static final MapColor EMERALD_GREEN = new MapColor(33, 55610);
public static final MapColor SPRUCE_BROWN = new MapColor(34, 8476209);
public static final MapColor DARK_RED = new MapColor(35, 0x700200);
public static final MapColor TERRACOTTA_WHITE = new MapColor(36, 13742497);
public static final MapColor TERRACOTTA_ORANGE = new MapColor(37, 10441252);
public static final MapColor TERRACOTTA_MAGENTA = new MapColor(38, 9787244);
public static final MapColor TERRACOTTA_LIGHT_BLUE = new MapColor(39, 7367818);
public static final MapColor TERRACOTTA_YELLOW = new MapColor(40, 12223780);
public static final MapColor TERRACOTTA_LIME = new MapColor(41, 6780213);
public static final MapColor TERRACOTTA_PINK = new MapColor(42, 10505550);
public static final MapColor TERRACOTTA_GRAY = new MapColor(43, 0x392923);
public static final MapColor TERRACOTTA_LIGHT_GRAY = new MapColor(44, 8874850);
public static final MapColor TERRACOTTA_CYAN = new MapColor(45, 0x575C5C);
public static final MapColor TERRACOTTA_PURPLE = new MapColor(46, 8014168);
public static final MapColor TERRACOTTA_BLUE = new MapColor(47, 4996700);
public static final MapColor TERRACOTTA_BROWN = new MapColor(48, 4993571);
public static final MapColor TERRACOTTA_GREEN = new MapColor(49, 5001770);
public static final MapColor TERRACOTTA_RED = new MapColor(50, 9321518);
public static final MapColor TERRACOTTA_BLACK = new MapColor(51, 2430480);
public static final MapColor DULL_RED = new MapColor(52, 12398641);
public static final MapColor DULL_PINK = new MapColor(53, 9715553);
public static final MapColor DARK_CRIMSON = new MapColor(54, 6035741);
public static final MapColor TEAL = new MapColor(55, 1474182);
public static final MapColor DARK_AQUA = new MapColor(56, 3837580);
public static final MapColor DARK_DULL_PINK = new MapColor(57, 5647422);
public static final MapColor BRIGHT_TEAL = new MapColor(58, 1356933);
public static final MapColor DEEPSLATE_GRAY = new MapColor(59, 0x646464);
public static final MapColor RAW_IRON_PINK = new MapColor(60, 14200723);
public static final MapColor LICHEN_GREEN = new MapColor(61, 8365974);其中第一个参数是 id，用于存储在数组中，第二个参数是基础颜色
每一种基础颜色还有4种不同的阴影，可以让基础颜色的 RGB 分别乘以一个数，然后除以 255 向下取整，得到一个新的颜色
LOW(0, 180),
NORMAL(1, 220),
HIGH(2, 255),
LOWEST(3, 135);而数组中存储颜色的方式就是
(颜色ID << 2) | (阴影ID & 3)
使用上面的阶梯型，就可以有241种不同的颜色（60*4加一个完全透明色）
https://en.wikipedia.org/wiki/Floyd%E2%80%93Steinberg_dithering
由于我们只有240色，必然导致颜色精度丢失，从而导致一些色块颜色不均
因此我们可以使用一种叫作 Floyd–Steinberg dithering 的图像抖动算法，来让图像更有渐变感
本项目的算法实现来自 Regarrzo/Java-Floyd-Steinberg-Dithering
配置仓库
maven() {
url = 'https://repo.flowerinsnow.online/repository/maven-public/'
}配置依赖
compileOnly('online.flowerinsnow.mappicture:api:1.0.0')配置前置
depend:
- MapPicture绘制地图像素画
MapPicture mp = MapPictureAPI.getInstance(); // 获取 API 对象
FilledMapPicture fmp = mp.createFilledMapPicture(); // 创建一副地图像素画
BufferedImage image = ...; // 从某种方式得到一张图片
fmp.draw(image, mp.getColourSelector(), mp.getColourSelector().getDitherer()); // 绘制此地图像素画
ItemStack itemStack = fmp.createItemStack(64); // 创建64个此地图像素画的物品插件目前只适用于 1.20.4-paper
/mappicture give <player> <width> <height> <dithering> <url>
此命令需要mappicture.give权限
例如，抖动绘制一张2格*2格的本地图片，给予flowerinsnow：
/mappicture give flowerinsnow 2 2 true file:///var/picture/cat.png
- flowerinsnowdh/ReflectionUtils (Apache-2.0 license)
- CarmJos/MineConfiguration (LGPL-3.0 license)
- Incendo/cloud (MIT license)
- Regarrzo/Java-Floyd-Steinberg-Dithering (Unlicense license)
本项目 plugin-r1-20-4/ 目录下的文件采用 GPL-3.0 license 开源
其余文件采用 Apache-2.0 license 开源
为编译 API 到本地仓库，请使用
cd api/
gradle publish为编译插件，请使用
cd plugin-r1-20-4/
gradle shadowJar
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