/** Opens a stack of images. */
ImagePlus openStack(ColorModel cm, boolean show) {
ImageStack stack = new ImageStack(fi.width, fi.height, cm);
long skip = fi.getOffset();
Object pixels;
try {
ImageReader reader = new ImageReader(fi);
InputStream is = createInputStream(fi);
if (is == null) return null;
IJ.resetEscape();
for (int i = 1; i <= fi.nImages; i++) {
if (!silentMode) IJ.showStatus("Reading: " + i + "/" + fi.nImages);
if (IJ.escapePressed()) {
IJ.beep();
IJ.showProgress(1.0);
silentMode = false;
return null;
}
pixels = reader.readPixels(is, skip);
if (pixels == null) break;
stack.addSlice(null, pixels);
skip = fi.gapBetweenImages;
if (!silentMode) IJ.showProgress(i, fi.nImages);
}
is.close();
} catch (Exception e) {
IJ.log("" + e);
} catch (OutOfMemoryError e) {
IJ.outOfMemory(fi.fileName);
stack.trim();
}
if (!silentMode) IJ.showProgress(1.0);
if (stack.getSize() == 0) return null;
if (fi.sliceLabels != null && fi.sliceLabels.length <= stack.getSize()) {
for (int i = 0; i < fi.sliceLabels.length; i++) stack.setSliceLabel(fi.sliceLabels[i], i + 1);
}
ImagePlus imp = new ImagePlus(fi.fileName, stack);
if (fi.info != null) imp.setProperty("Info", fi.info);
if (show) imp.show();
imp.setFileInfo(fi);
setCalibration(imp);
ImageProcessor ip = imp.getProcessor();
if (ip.getMin() == ip.getMax()) // find stack min and max if first slice is blank
setStackDisplayRange(imp);
if (!silentMode) IJ.showProgress(1.0);
silentMode = false;
return imp;
}
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;
}
/**
* Constructs a new ImageReader using a FileInfo object to describe the file to be read.
*
* @see ij.io.FileInfo
*/
public ImageReader(FileInfo fi) {
this.fi = fi;
width = fi.width;
height = fi.height;
skipCount = fi.getOffset();
}
