创建具有宽度，高度和位深度的BufferedImage

Question

我想创建一个带有certin宽度，高度（800x600）和位深度为24的 BufferedImage ，我希望图像背景是透明的。

我该怎么做？

感谢你。

Answer 1

使用构造函数并传递合适的格式参数：

new BufferedImage(w, h, BufferedImage.TYPE_?);

TYPE_在哪里？是定义具有alpha通道格式的常量，如TYPE_INT_ARGB。

编辑：直接来自BufferedImage

/**
 * Represents an image with 8-bit RGBA color components packed into
 * integer pixels.  The image has a <code>DirectColorModel</code>
 * with alpha. The color data in this image is considered not to be
 * premultiplied with alpha.  When this type is used as the
 * <code>imageType</code> argument to a <code>BufferedImage</code>
 * constructor, the created image is consistent with images
 * created in the JDK1.1 and earlier releases.
 */
public static final int TYPE_INT_ARGB = 2;

Answer 2

这些是BufferedImage的选项：

BufferedImage(ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied, Hashtable<?,?> properties) 

BufferedImage(int width, int height, int imageType) 

BufferedImage(int width, int height, int imageType, IndexColorModel cm)