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/* sane - Scanner Access Now Easy.
Copyright (C) 2019 Touboul Nathane
Copyright (C) 2019 Thierry HUCHARD <thierry@ordissimo.com>
This file is part of the SANE package.
SANE is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
SANE is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with sane; see the file COPYING.
If not, see <https://www.gnu.org/licenses/>.
This file implements a SANE backend for eSCL scanners. */
#define DEBUG_DECLARE_ONLY
#include "../include/sane/config.h"
#include "escl.h"
#include "../include/sane/sanei.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if(defined HAVE_TIFFIO_H)
#include <tiffio.h>
#endif
#include <setjmp.h>
#if(defined HAVE_TIFFIO_H)
/**
* \fn SANE_Status escl_sane_decompressor(escl_sane_t *handler)
* \brief Function that aims to decompress the png image to SANE be able to read the image.
* This function is called in the "sane_read" function.
*
* \return SANE_STATUS_GOOD (if everything is OK, otherwise, SANE_STATUS_NO_MEM/SANE_STATUS_INVAL)
*/
SANE_Status
get_TIFF_data(capabilities_t *scanner, int *width, int *height, int *bps)
{
TIFF* tif = NULL;
uint32 w = 0;
uint32 h = 0;
unsigned char *surface = NULL; /* image data*/
int components = 4;
uint32 npixels = 0;
SANE_Status status = SANE_STATUS_GOOD;
lseek(fileno(scanner->tmp), 0, SEEK_SET);
tif = TIFFFdOpen(fileno(scanner->tmp), "temp", "r");
if (!tif) {
DBG( 1, "Escl Tiff : Can not open, or not a TIFF file.\n");
status = SANE_STATUS_INVAL;
goto close_file;
}
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
npixels = w * h;
surface = (unsigned char*) malloc(npixels * sizeof (uint32));
if (surface != NULL)
{
DBG( 1, "Escl Tiff : raster Memory allocation problem.\n");
status = SANE_STATUS_INVAL;
goto close_tiff;
}
if (!TIFFReadRGBAImage(tif, w, h, (uint32 *)surface, 0))
{
DBG( 1, "Escl Tiff : Problem reading image data.\n");
status = SANE_STATUS_INVAL;
free(surface);
goto close_tiff;
}
*bps = components;
// If necessary, trim the image.
surface = escl_crop_surface(scanner, surface, w, h, components, width, height);
if (!surface) {
DBG( 1, "Escl Tiff : Surface Memory allocation problem\n");
status = SANE_STATUS_INVAL;
}
close_tiff:
TIFFClose(tif);
close_file:
if (scanner->tmp)
fclose(scanner->tmp);
scanner->tmp = NULL;
return (status);
}
#else
SANE_Status
get_TIFF_data(capabilities_t __sane_unused__ *scanner,
int __sane_unused__ *w,
int __sane_unused__ *h,
int __sane_unused__ *bps)
{
return (SANE_STATUS_INVAL);
}
#endif
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