您可以实现 DynamicOperation 接口并将其添加到您的操作堆栈中。
示例用例:
需要将给定图像的大小调整为图像大小集中的所有其他图像大小。
例如:
Set1:[16x16、32x32、64x64],
Set2:[12x12、24x24、48x48]。
如果输入图像的大小为 32x32,则需要将其大小调整为 16x16、64x64。
代码:
...
DynamicResizeOperation drOp = new DynamicResizeOperation();
IMOperation op = new IMOperation();
op.addImage(inputImagePath);
op.addDynamicOperation(drOp);
op.addImage(); //place holder for out put image
...
for (IMSize imSize : resizeList) {
//set the dynamic size to resize
drOp.setSize(imSize.getWidth(), imSize.getHeight());
...
class DynamicResizeOperation implements DynamicOperation {
private int height;
private int width;
public DynamicResizeOperation() {}
public void setSize(int width, int height) {
this.height = height;
this.width = width;
}
@Override
public Operation resolveOperation(Object... pImages) throws IM4JavaException {
//return the resize operation if and only if both height and width are non zero positive values
if (height > 0 && width > 0) {
IMOperation op = new IMOperation();
op.resize(width, height, "!");
return op;
}
return null;
}
}