LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
October 2006
Previous Thread
Next Thread
Previous by Thread
Next by Thread
Previous by Date
Next by Date
Contact
The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems
Thread
2006.10.25 08:48 "Newbie Question on Memory Usage within LibTiff", by Amarnath S
Hi,
I am a newcomer to LibTiff, and to TIFF in general; this question
relates to memory usage in the TIFF library. I have a simple C program to
create a TIFF file (modified slightly from its original, available on
www.stillhq.com). I ran it on Visual C++ 6.0. At the line marked AAAA in the
code, the memory usage was 1404 K, whereas at BBBB, it was 1516 K (as
monitored on the Windows Task Manager); this means that there is a memory
leak somewhere. I am using Windows XP SP2. The entire C program is given
below.
Now, my questions are:
Are there any known memory issues within the TIFF Library? I believe not,
but then, what am I missing? Please help me in finding a remedy this memory
usage issue.
Thanks and Regards
- Amarnath
/*-----------------------------------CODE
START-----------------------------*/
#include <stdio.h>
#include "tiffio.h"
int main(int argc, char *argv[]){
// Define the buffer for an image which is 64 pixels by 32 pixels - 1 bit
per pixel
char buffer[8 * 32];
TIFF *image;
int i;
for ( i = 0; i < 8 * 32; ++i ) /* ------------LINE AAAA---------------
*/
buffer[i] = (i % 2) ? 0x00 : 0xFF;
// Open the TIFF file
if((image = TIFFOpen("output.tif", "w")) == NULL){
printf("Could not open output.tif for writing\n");
return -1;
}
// Set values for basic tags before we can add any data
TIFFSetField(image, TIFFTAG_IMAGEWIDTH, 8 * 8);
TIFFSetField(image, TIFFTAG_IMAGELENGTH, 32);
TIFFSetField(image, TIFFTAG_BITSPERSAMPLE, 1);
TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField(image, TIFFTAG_ROWSPERSTRIP, 32);
TIFFSetField(image, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
TIFFSetField(image, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISWHITE);
TIFFSetField(image, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(image, TIFFTAG_XRESOLUTION, 150.0);
TIFFSetField(image, TIFFTAG_YRESOLUTION, 150.0);
TIFFSetField(image, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
// Write the information to the file
TIFFWriteEncodedStrip(image, 0, buffer, 8 * 32);
// Close the file
TIFFClose(image);
return 0; /* ------------LINE BBBB--------------- */
}
/*-----------------------------------CODE
END-------------------------------*/