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August 2007
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2007.08.04 09:02 "Re: reading planar images using TIFFReadScanline", by Kai-uwe Behrmann
We always avoid TIFFReadEncodedStrip to not to unpack the data ourself. TIFFReadScanline works correct for PLANARCONFIG_SEPARATE continously reading the whole image, channel for channel. I attached the according code snippet from CinePaint's tiff plug-in. regards Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org + www.cinepaint.org Am 03.08.07, 11:17 -0400 schrieb Christian Henning: > Thanks for the advise. Yes, my code can read. But I'm using > TIFFReadEncodedStrip and I get the right data. I was just wondering if > there is a way to read it using TIFFReadScanline? > > Does anyone know if it's possible? > > Christian > > On 8/3/07, Kai-Uwe Behrmann <ku.b@gmx.de> wrote: > > CinePaint reads Caspian.tif fine. Is your code ready for the data? > > Bits/Sample: 64 > > Sample Format: IEEE floating point > > with libtiff 3.8.2 > > > > regards > > Kai-Uwe Behrmann > > -- > > developing for colour management > > www.behrmann.name + www.oyranos.org + www.cinepaint.org > > > > Am 02.08.07, 13:45 -0400 schrieb Christian Henning: > > > > > Sorry, I should have read my email before sending. My question > > > regarding TIFFReadScanline was in conjunction with planar images. Here > > > as everyone knows the channels are stored subsequently. So, it made me > > > wonder if TIFFReadScanline still works. A quite test with the > > > caspian.tif test image results in a messed up image. > > > > > > Regards, > > > Christian > > > } else { /* PLANARCONFIG_SEPARATE */ uint16 sample; gint start = TRUE; if (ci->channel->drawable->bpp != (int)((float)ci->bps/8 * (float)ci->spp) && ci->bps < 64) g_warning ("%s:%d %s() drawables and tiffs byte depth are different %d != %01f(%01f*%01f)\n",__FILE__,__LINE__,__func__, ci->channel->drawable->bpp, (float)ci->bps/8.0* (float)ci->spp, (float)ci->bps/8.0, (float)ci->spp); for (sample = 0; sample < (ci->spp + ci->extra); sample++) { m_new (text, char, 256, ;) sprintf (text, "%s '%s' plane %d ...",_("Opening"), ci->top->filename, sample + 1); gimp_progress_init (text); m_free (text) for (j_row = 0; j_row < ci->rows; j_row += tile_height) { gimp_progress_update ( (double) j_row / (double) ci->rows); rows = MIN (tile_height, ci->rows - j_row); for (g_row = 0; g_row < rows; ++g_row) { TIFFReadScanline(tif, buffer + g_row * lineSize, (uint32)(j_row + g_row), sample); } read_separate (buffer, ci, 0, j_row, ci->cols, rows, (gint)sample); start = FALSE; } } }