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comparison libinterp/corefcn/__tiff__.cc @ 31191:8ada1e68d961

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__tiff__.cc (F__tiff_imread__): added support for PixelRegion option.
author magedrifaat <magedrifaat@gmail.com>
date Fri, 26 Aug 2022 23:30:55 +0200
parents a91f2f79e58c
children 6a2bb6f4e41e
comparison
equal deleted inserted replaced
31190:a91f2f79e58c 31191:8ada1e68d961
3693 default: 3693 default:
3694 // FIXME: should this fallback to magick instead? 3694 // FIXME: should this fallback to magick instead?
3695 error ("Unsupported sample format"); 3695 error ("Unsupported sample format");
3696 } 3696 }
3697 3697
3698 // Use octave_value methods to slice the data without knowledge of
3699 // the underlying data type to avoid code duplication
3700 // FIXME: this approach is slow when the needed region is much smaller
3701 // than the image size because the entire image will be read first
3702 octave_value_list idx (3);
3703 // Need to use range because normal idx_vector constuctor handles steps
3704 // in a wrong way (FIXME?)
3705 idx(0) = idx_vector (range<double> (row_region (0), row_region (1),
3706 row_region(2)));
3707 idx(1) = idx_vector (range<double> (col_region (0), col_region (1),
3708 col_region(2)));
3709 idx(2) = idx_vector (':');
3710 retval(0) = retval(0).index_op (idx);
3711
3698 if (nargout > 1) 3712 if (nargout > 1)
3699 { 3713 {
3700 // Also return the color map if available 3714 // Also return the color map if available
3701 uint16_t photometric; 3715 uint16_t photometric;
3702 if (TIFFGetField (tif, TIFFTAG_PHOTOMETRIC, &photometric) 3716 if (TIFFGetField (tif, TIFFTAG_PHOTOMETRIC, &photometric)