Example #1
0
 /** 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;
 }
Example #2
0
 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;
 }