Java Swing重/慢paintComponent - 任何建议？ [英] Java Swing heavy/slow paintComponent - any advice?

问题描述

我正在制作一个滚动的2D地图/平铺游戏。每个图块（存储为图块[21] [11] - 每个图总共231个图块）最多可包含21个值（存储为int [3] [7]）。全屏时我一次看到大约8张地图。

I'm making a scrolling 2D map/tile based game. Each tile (stored as tile[21][11] - 231 tiles total per map) can contain up to 21 values (stored as int[3][7]). While full-screen I see about 8 maps at once.

平均来说，每张地图需要大约0.03秒来绘制（使用System.nanoTime找到）。问题是，只要屏幕上有多个地图，Swing事件轮询就会明显减慢。

On average, each map takes about 0.03 seconds to draw (found with System.nanoTime). The problem is that as soon as more than 1 map is on the screen, the Swing event polling noticeably slows down.

有没有解决方法呢？我无法一次绘制地图以将其保存为图像，因为它具有涉及移动演员的透明度，因此它变化太频繁。另外我不认为我可以在paintComponent中调用一个线程来绘制地图而不会出现故障，但我不是肯定的。

Is there any solution to this? I can't draw the map a single time to save it as an image because it has transparency involving moving actors, so it changes too frequently. Also I don't think I can call a thread in paintComponent to draw the maps without it glitching out, but I'm not positive.

推荐答案

我的 Tiles 不是任何类型的 JComponent ，它们是只是数据。我将其容器称为 MapPane ，它会在 paintComponent 中绘制所有切片。

My Tiles aren't any type of JComponent, they're just data. I call their container the MapPane, which draws all of the tiles in its paintComponent.

同样， JTable 单元格只是在 JComponent ; 此处提到的flyweight模式仍然适用：目标是省略任何渲染不可见单元格的工作。 个人资料和自我时间以优化渲染为目的; 此处引用的 KineticModel 中检查了一些方法。

Likewise, JTable cells are just data rendered inside a JComponent; the flyweight pattern, mentioned here, is still applicable: the goal is to omit any effort to render non-visible cells. Profile and self-time with a view toward optimizing the rendering; some approaches are examined in the KineticModel cited here.

最好不需要缩放的 BufferedImage 。如果必须缩放，请尝试与插值类型相关的 RenderingHints 。如果合成太贵，可以使用 SwingWorker在后台构建地图 ; publish（）它们可用， process（）它们在EDT上，如图所示其他。

A BufferedImage that needs no scaling is best. If you must scale, experiment with RenderingHints related to interpolation type. If composition is too expensive, construct maps in the background using SwingWorker; publish() them as they become available and process() them on the EDT, as shown here.

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