RenderTests.java 文件源码

private TexturePaint makeTexturePaint(int size, boolean alpha) {
    int s2 = size / 2;
    int type =
        alpha ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB;
    BufferedImage img = new BufferedImage(size, size, type);
    Color[] colors = makeGradientColors(4, alpha);
    Graphics2D g2d = img.createGraphics();
    g2d.setComposite(AlphaComposite.Src);
    g2d.setColor(colors[0]);
    g2d.fillRect(0, 0, s2, s2);
    g2d.setColor(colors[1]);
    g2d.fillRect(s2, 0, s2, s2);
    g2d.setColor(colors[3]);
    g2d.fillRect(0, s2, s2, s2);
    g2d.setColor(colors[2]);
    g2d.fillRect(s2, s2, s2, s2);
    g2d.dispose();
    Rectangle2D bounds = new Rectangle2D.Float(0, 0, size, size);
    return new TexturePaint(img, bounds);
}