Tumble-users Digest, Vol 2, Issue 1

[Fred Jan Kraan]

"Eric Smith" wrote:
>
> There are three possibilities for input B/W TIFF files:
>
> No photometric interpretation flag
> photometric interpretation black=0, white=1
> photometric interpretation black=1, white=0
>
> I know that tumble as released gets at least one of these cases
> wrong, and more likely two, but I have not had time to sort it out.
>   
For my usage the problems were fixed by the following changes:

removed the pbm support from the Makefile (could not find the library
and did not need it):

fjkraan at UbVar:~$ diff tumble/Makefile tumble-0.33/Makefile
34c34
< LDLIBS = -ltiff -ljpeg -lpbm -lz -lm
---
> LDLIBS = -ltiff -ljpeg -lz -lm
110c110
<               tumble_input.o tumble_tiff.o tumble_jpeg.o tumble_pbm.o \
---
>               tumble_input.o tumble_tiff.o tumble_jpeg.o \

tumble_input.h:
fjkraan at UbVar:~$ diff tumble/tumble_input.h tumble-0.33/tumble_input.h
29a30
>   uint16_t photometric;

tumble_tiff.c:
fjkraan at UbVar:~$ diff tumble/tumble_tiff.c tumble-0.33/tumble_tiff.c
103a104
>   uint16_t photometric;
145a147,159
>   if (1 != TIFFGetField (tiff_in, TIFFTAG_PHOTOMETRIC, & photometric))
>     {
>       fprintf (stderr, "can't get photometric tag\n");
>       return (0);
>     } else {
>       if (photometric != 0 && photometric != 1)
>       {
>           fprintf (stderr, "value for photometric tag \'%d\' not
supported\n", photometric);
>         return (0);
>       }
>       image_info->photometric = photometric;
>     }
>
336c350,352
<                         0); /* BlackIs1 */
---
>                         image_info->photometric);
>                         /*1);  BlackIs1 (original value was 0, reversing
>                                tiff originated pdf. fjk20061223*/

Fred Jan