本文整理匯總了Java中javax.imageio.metadata.IIOMetadataNode.insertBefore方法的典型用法代碼示例。如果您正苦於以下問題：Java IIOMetadataNode.insertBefore方法的具體用法？Java IIOMetadataNode.insertBefore怎麽用？Java IIOMetadataNode.insertBefore使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類javax.imageio.metadata.IIOMetadataNode的用法示例。
在下文中一共展示了IIOMetadataNode.insertBefore方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: getStandardDimensionNode
import javax.imageio.metadata.IIOMetadataNode; //導入方法依賴的package包/類
protected IIOMetadataNode getStandardDimensionNode() {
// If we have a JFIF marker segment, we know a little
// otherwise all we know is the orientation, which is always normal
IIOMetadataNode dim = new IIOMetadataNode("Dimension");
IIOMetadataNode orient = new IIOMetadataNode("ImageOrientation");
orient.setAttribute("value", "normal");
dim.appendChild(orient);
JFIFMarkerSegment jfif =
(JFIFMarkerSegment) findMarkerSegment(JFIFMarkerSegment.class, true);
if (jfif != null) {
// Aspect Ratio is width of pixel / height of pixel
float aspectRatio;
if (jfif.resUnits == 0) {
// In this case they just encode aspect ratio directly
aspectRatio = ((float) jfif.Xdensity)/jfif.Ydensity;
} else {
// They are true densities (e.g. dpi) and must be inverted
aspectRatio = ((float) jfif.Ydensity)/jfif.Xdensity;
}
IIOMetadataNode aspect = new IIOMetadataNode("PixelAspectRatio");
aspect.setAttribute("value", Float.toString(aspectRatio));
dim.insertBefore(aspect, orient);
// Pixel size
if (jfif.resUnits != 0) {
// 1 == dpi, 2 == dpc
float scale = (jfif.resUnits == 1) ? 25.4F : 10.0F;
IIOMetadataNode horiz =
new IIOMetadataNode("HorizontalPixelSize");
horiz.setAttribute("value",
Float.toString(scale/jfif.Xdensity));
dim.appendChild(horiz);
IIOMetadataNode vert =
new IIOMetadataNode("VerticalPixelSize");
vert.setAttribute("value",
Float.toString(scale/jfif.Ydensity));
dim.appendChild(vert);
}
}
return dim;
}