The fix in
http://trac.osgeo.org/gdal/changeset/19985
I can download and replace the file in the 1.7.2 version of gdal I have
and compile gdal again and it will work?
Or should I wait for 1.7.3?
Yours
Tomas
Tomas R skrev 2010-07-06 20:02:
So a solution/a fix is available when 1.7.3 is released somewhere in
the future? That somewhere might occur when?
If you are correct that is. But of course you are....
:)
/Tomas
Even Rouault skrev 2010-07-06 19:46:
Chaitanya,
Actually I think I've spotted the regression in
http://trac.osgeo.org/gdal/changeset/17398, which was a 1.7 change.
Namely the change from
int i;
for( i = 0; i< LZW_CLEAR; i++ )
character[i] = i;
to
GByte j;
for( j = 0; j< LZW_CLEAR; j++ )
character[j] = j;
The issue is that LZW_CLEAR = 256, so as j is an unsigned char -
restricted
from 0 to 255 -, the j< LZW_CLEAR condition is always true, thus the
infinite loop...
This part should be reverted. If you really want to shut up the compiler
warning character[i] = (GByte)i but in an ideal world, the compiler
should be
clever enough to see that there's no risk of data loss as i does fit
in a
GByte...
Best regards,
Even
Le Tuesday 06 July 2010 19:18:56 Tomas R, vous avez écrit :
The reason for the out of memory exception was because the RIK-map I
tested with i wasfar to big to be read into a bitmap. I have now
created
a smaller sample.
With the small RIK-fil I can reproduce the problem with the precompiled
binaries from dyndns so problem is not only on my part. Using the small
map (1000x750 pixels) the demo app from Gdal 1.6.1 works as it should.
1.7.2 hangs with no exception given.
See ticket http://trac.osgeo.org/gdal/ticket/3674
The post you answered I tried to delete and somewhat succeeded... I
happened to compile the wrong file. When I thought I was compiling the
GDALReadDirect.cs I instead compiled the GDALRead.cs.
Yours
Tomas
Chaitanya kumar CH skrev 2010-07-06 18:24:
Tomas,
I don't see any changes that could lead to infinite loops or memory
leaks recently.
If you can provide a sample dataset that gives this error please raise
a ticket at http://trac.osgeo.org/gdal/newticket
On Tue, Jul 6, 2010 at 6:43 PM, Tomas R<mon...@home.se
<mailto:mon...@home.se>> wrote:
I add - perhaps a problem with my comilation of Gdal. Note when
I compile the GdalReadDirect.cs as it is and run it the result
differs from the result of the GdalReadDirect.exe found in
Swig\Csharp.
The latter gives the Raster dataset Paramets and runs until an
Out
of memory Exception. Mine hangs and I have to abort it.
What have I done wrong this time?
Will try to recompile gdal and see if anything changes.
Tomas R skrev 2010-07-06 14:16:
I have a problem with RIK-maps and Gdal 1.7.2.
If I use Gdal 1.6.1 I have no problem reading the map but
doing the same with Gdal 1.7.2 my whole plugin/software
hangs.
I have identified that Gdal stops at the line
band.ReadRaster(x, y, width, height, r, width, height, 0,
0);
where x, y, width and height are controlled to be within the
image to load.
This line taken from the routine
private void SaveBitmapPaletteDirect(...)
from the C# samples. I have adapted it to load only a portion
of the map into a bitmap.
I have compiled Gdal myself, perhaps a problem with the
compilation? Do I miss the RIK-driver or something? Or is
there an error in Gdal? Or perhaps in the file(s)?
I have no problem opening and getting the properties of the
file, i.e. coordinate system and alike. It is when I try to
read the file that Gdal hangs.
I get no Exception, it just hangs and eats CPU-time.
I compile the C# sample GDALReadDirect.cs from Gdal 1.7.2
and
adapt it to read a portion of a big RIK file (500x500 pixels)
and it stops at the same point in code. Error in the driver
for RIK perhaps? or error in the sample code?
Yours
Tomas
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Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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