本文整理汇总了Java中javax.imageio.ImageWriteParam.getSourceYSubsampling方法的典型用法代码示例。如果您正苦于以下问题：Java ImageWriteParam.getSourceYSubsampling方法的具体用法？Java ImageWriteParam.getSourceYSubsampling怎么用？Java ImageWriteParam.getSourceYSubsampling使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javax.imageio.ImageWriteParam的用法示例。
在下文中一共展示了ImageWriteParam.getSourceYSubsampling方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: computeRegions
import javax.imageio.ImageWriteParam; //导入方法依赖的package包/类
/**
* Compute the source region and destination dimensions taking any
* parameter settings into account.
*/
private static void computeRegions(Rectangle sourceBounds,
Dimension destSize,
ImageWriteParam p) {
ImageWriteParam param;
int periodX = 1;
int periodY = 1;
if (p != null) {
int[] sourceBands = p.getSourceBands();
if (sourceBands != null &&
(sourceBands.length != 1 ||
sourceBands[0] != 0)) {
throw new IllegalArgumentException("Cannot sub-band image!");
}
// Get source region and subsampling factors
Rectangle sourceRegion = p.getSourceRegion();
if (sourceRegion != null) {
// Clip to actual image bounds
sourceRegion = sourceRegion.intersection(sourceBounds);
sourceBounds.setBounds(sourceRegion);
}
// Adjust for subsampling offsets
int gridX = p.getSubsamplingXOffset();
int gridY = p.getSubsamplingYOffset();
sourceBounds.x += gridX;
sourceBounds.y += gridY;
sourceBounds.width -= gridX;
sourceBounds.height -= gridY;
// Get subsampling factors
periodX = p.getSourceXSubsampling();
periodY = p.getSourceYSubsampling();
}
// Compute output dimensions
destSize.setSize((sourceBounds.width + periodX - 1)/periodX,
(sourceBounds.height + periodY - 1)/periodY);
if (destSize.width <= 0 || destSize.height <= 0) {
throw new IllegalArgumentException("Empty source region!");
}
}