static void error(String msg, FileInfo fi, long offset, long length) {
IJ.error(
"FileOpener",
"FileInfo parameter error. \n"
+ msg
+ "\n \n"
+ " Width: "
+ fi.width
+ "\n"
+ " Height: "
+ fi.height
+ "\n"
+ " Offset: "
+ offset
+ "\n"
+ " Bytes/pixel: "
+ fi.getBytesPerPixel()
+ "\n"
+ (length > 0 ? " File length: " + length + "\n" : ""));
}
static boolean validateFileInfo(File f, FileInfo fi) {
long offset = fi.getOffset();
long length = 0;
if (fi.width <= 0 || fi.height < 0) {
error("Width or height <= 0.", fi, offset, length);
return false;
}
if (offset >= 0 && offset < 1000L) return true;
if (offset < 0L) {
error("Offset is negative.", fi, offset, length);
return false;
}
if (fi.fileType == FileInfo.BITMAP || fi.compression != FileInfo.COMPRESSION_NONE) return true;
length = f.length();
long size = fi.width * fi.height * fi.getBytesPerPixel();
size = fi.nImages > 1 ? size : size / 4;
if (fi.height == 1) size = 0; // allows plugins to read info of unknown length at end of file
if (offset + size > length) {
error("Offset + image size > file length.", fi, offset, length);
return false;
}
return true;
}