hdfls(1) [debian man page]
HDFLS(1) General Commands Manual HDFLS(1) NAME
hdfls - list basic information about an HDF file SYNOPSIS
hdfls [-o] [-l] [-d] [-v] [-g] [-s] [-h] [-t n] hdf_file DESCRIPTION
hdfls provides general information about the tags, reference numbers, and if requested, lengths of the data elements. OPTIONS
-o display the reference numbers in ascending order. -l long format. Display more information about the file. -d Display offset and length information for each element in the file. -v verbose. Display annotation and label text, along with the format triggered by the -l flag. -g Group. List items by group. -s Special elements. Display detailed information about special elements. -d Display offset and length information for each element in the file. -h Dump DD block information. -t n Tag. Only list information about the specified tag. Must be followed by a tag number. EXAMPLES
A file called "aa.hdf" contains three items associated with a raster image; the image dimensions, a palette, and the raster image. To dis- play information about the contents of this file, the following command is used. hdfls aa.hdf The following output is displayed: aa.hdf: Image Dimensions-8: (Raster-8): (tag 200) Ref nos: 1 Image Palette-8: (Raster-8): (tag 201) Ref nos: 3 Raster Image-8: (Raster-8): (tag 202) Ref nos: 1 The following displays the same information with the length of each data element: hdfls -l aa.hdf This would result in the following information being displayed: aa.hdf: Image Dimensions-8: (Raster-8) : (tag 200) Ref no 1 4 bytes Image Palette-8: (Raster-8) : (tag 201) Ref no 3 768 bytes Raster Image-8: (Raster-8) : (tag 202) Ref no 1 120000 bytes SEE ALSO
hdf(5) October 31, 1999 HDFLS(1)
Check Out this Related Man Page
TIFFReadRGBAImage(3T) TIFFReadRGBAImage(3T) NAME
TIFFReadRGBAImage - read and decode an image into a fixed-format raster SYNOPSIS
#include <tiffio.h> #define TIFFGetR(abgr) ((abgr) & 0xff) #define TIFFGetG(abgr) (((abgr) >> 8) & 0xff) #define TIFFGetB(abgr) (((abgr) >> 16) & 0xff) #define TIFFGetA(abgr) (((abgr) >> 24) & 0xff) int TIFFReadRGBAImage(TIFF* tif, u_long width, u_long height, u_long* raster, int stopOnError) DESCRIPTION
TIFFReadRGBAImage reads a strip- or tile-based image into memory, storing the result in the user supplied raster. The raster is assumed to be an array of width times height 32-bit entries, where width must be less than or equal to the width of the image (height may be any non- zero size). If the raster dimensions are smaller than the image, the image data is cropped to the raster bounds. If the raster height is greater than that of the image, then the image data are placed in the lower part of the raster. (Note that the raster is assume to be organized such that the pixel at location (x,y) is raster[y*width+x]; with the raster origin in the lower-left hand corner.) Raster pixels are 8-bit packed red, green, blue, alpha samples. The macros TIFFGetR, TIFFGetG, TIFFGetB, and TIFFGetA should be used to access individual samples. Images without Associated Alpha matting information have a constant Alpha of 1.0(255). TIFFReadRGBAImage converts non-8-bit images by scaling sample values. Palette, grayscale, bilevel, CMYK, and YCbCr images are converted to RGB transparently. Raster pixels are returned uncorrected by any colorimetry information present in the directory. The paramater stopOnError specifies how to act if an error is encountered while reading the image. If stopOnError is non-zero, then an error will terminate the operation; otherwise TIFFReadRGBAImage will continue processing data until all the possible data in the image have been requested. NOTES
In C++ the stopOnError parameter defaults to 0. Samples must be either 1, 2, 4, 8, or 16 bits. Colorimetric samples/pixel must be either 1, 3, or 4 (i.e. SamplesPerPixel minus ExtraSam- ples). Palettte image colormaps that appear to be incorrectly written as 8-bit values are automatically scaled to 16-bits. TIFFReadRGBAImage is just a wrapper around the more general TIFFRGBAImage(3T) facilities. RETURN VALUES
1 is returned if the image was successfully read and converted. Otherwise, 0 is returned if an error was encountered and stopOnError is zero. DIAGNOSTICS
All error messages are directed to the TIFFError(3T) routine. Sorry, can not handle %d-bit pictures. The image had BitsPerSample other than 1, 2, 4, 8, or 16. Sorry, can not handle %d-channel images. The image had SamplesPerPixel other than 1, 3, or 4. Missing needed "PhotometricInterpretation" tag. The image did not have a tag that describes how to display the data. No "PhotometricInterpretation" tag, assuming RGB. The image was missing a tag that describes how to display it, but because it has 3 or 4 samples/pixel, it is assumed to be RGB. No "PhotometricInterpretation" tag, assuming min-is-black. The image was missing a tag that describes how to display it, but because it has 1 sample/pixel, it is assumed to be a grayscale or bilevel image. No space for photometric conversion table. There was insufficient memory for a table used to convert image samples to 8-bit RGB. Missing required "Colormap" tag. A Palette image did not have a required Colormap tag. No space for tile buffer. There was insufficient memory to allocate an i/o buffer. No space for strip buffer. There was insufficient memory to allocate an i/o buffer. Can not handle format. The image has a format (combination of BitsPerSample, SamplesPerPixel, and PhotometricInterpretation) that TIFF- ReadRGBAImage can not handle. No space for B&W mapping table. There was insufficient memory to allocate a table used to map grayscale data to RGB. No space for Palette mapping table. There was insufficient memory to allocate a table used to map data to 8-bit RGB. BUGS
Orientations other than bottom-left, or top-left are not handled correctly. SEE ALSO
libtiff(3T), TIFFOpen(3T), TIFFRGBAImage(3T), TIFFReadRGBAStrip(3T), TIFFReadRGBATile(3T) February 14, 1992 TIFFReadRGBAImage(3T)