1 files changed, 119 insertions, 0 deletions
diff --git a/backend/escl/escl_tiff.c b/backend/escl/escl_tiff.c
new file mode 100644
index 0000000..52aec20
--- /dev/null
+++ b/backend/escl/escl_tiff.c
@@ -0,0 +1,119 @@
+/* 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, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+   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 *w, int *h, int *components)
+{
+    TIFF* tif = NULL;
+    uint32  width = 0;           /* largeur */
+    uint32  height = 0;          /* hauteur */
+    unsigned char *raster = NULL;         /* données de l'image */
+    int bps = 4;
+    uint32 npixels = 0;
+
+    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");
+        if (scanner->tmp) {
+           fclose(scanner->tmp);
+           scanner->tmp = NULL;
+        }
+        return (SANE_STATUS_INVAL);
+    }
+
+    TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
+    TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
+    npixels = width * height;
+    raster = (unsigned char*) malloc(npixels * sizeof (uint32));
+    if (raster != NULL)
+    {
+        DBG( 1, "Escl Tiff : Memory allocation problem.\n");
+        if (scanner->tmp) {
+           fclose(scanner->tmp);
+           scanner->tmp = NULL;
+        }
+        return (SANE_STATUS_INVAL);
+    }
+
+    if (!TIFFReadRGBAImage(tif, width, height, (uint32 *)raster, 0))
+    {
+        DBG( 1, "Escl Tiff : Problem reading image data.\n");
+        if (scanner->tmp) {
+           fclose(scanner->tmp);
+           scanner->tmp = NULL;
+        }
+        return (SANE_STATUS_INVAL);
+    }
+    *w = (int)width;
+    *h = (int)height;
+    *components = bps;
+    // we don't need row pointers anymore
+    scanner->img_data = raster;
+    scanner->img_size = (int)(width * height * bps);
+    scanner->img_read = 0;
+    TIFFClose(tif);
+    fclose(scanner->tmp);
+    scanner->tmp = NULL;
+    return (SANE_STATUS_GOOD);
+}
+#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