Merge branch 'release/debian/1.0.31-1_experimental1' into masterdebian/1.0.31-1_experimental1

1 files changed, 102 insertions, 0 deletions

diff --git a/backend/escl/escl_crop.c b/backend/escl/escl_crop.c
new file mode 100644
index 0000000..8740d22
--- /dev/null
+++ b/backend/escl/escl_crop.c
@@ -0,0 +1,102 @@
+/* sane - Scanner Access Now Easy.
+
+   Copyright (C) 2020 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+unsigned char *
+escl_crop_surface(capabilities_t *scanner,
+               unsigned char *surface,
+	       int w,
+	       int h,
+	       int bps,
+	       int *width,
+	       int *height)
+{
+    double ratio = 1.0;
+    int x_off = 0, x = 0;
+    int real_w = 0;
+    int y_off = 0, y = 0;
+    int real_h = 0;
+    unsigned char *surface_crop = NULL;
+
+    DBG( 1, "Escl Image Crop\n");
+    ratio = (double)w / (double)scanner->caps[scanner->source].width;
+    scanner->caps[scanner->source].width = w;
+    if (scanner->caps[scanner->source].pos_x < 0)
+       scanner->caps[scanner->source].pos_x = 0;
+    if (scanner->caps[scanner->source].pos_x &&
+        (scanner->caps[scanner->source].width >
+        scanner->caps[scanner->source].pos_x))
+       x_off = (int)((double)scanner->caps[scanner->source].pos_x * ratio);
+    real_w = scanner->caps[scanner->source].width - x_off;
+
+    scanner->caps[scanner->source].height = h;
+    if (scanner->caps[scanner->source].pos_y &&
+        (scanner->caps[scanner->source].height >
+        scanner->caps[scanner->source].pos_y))
+       y_off = (int)((double)scanner->caps[scanner->source].pos_y * ratio);
+    real_h = scanner->caps[scanner->source].height - y_off;
+
+    DBG( 1, "Escl Image Crop [%dx%d|%dx%d]\n", scanner->caps[scanner->source].pos_x, scanner->caps[scanner->source].pos_y,
+		    scanner->caps[scanner->source].width, scanner->caps[scanner->source].height);
+
+    *width = real_w;
+    *height = real_h;
+    DBG( 1, "Escl Image Crop [%dx%d]\n", *width, *height);
+    if (x_off > 0 || real_w < scanner->caps[scanner->source].width ||
+        y_off > 0 || real_h < scanner->caps[scanner->source].height) {
+          surface_crop = (unsigned char *)malloc (sizeof (unsigned char) * real_w
+                     * real_h * bps);
+	  if(!surface_crop) {
+             DBG( 1, "Escl Crop : Surface_crop Memory allocation problem\n");
+	     free(surface);
+	     surface = NULL;
+	     goto finish;
+	  }
+          for (y = 0; y < real_h; y++)
+          {
+             for (x = 0; x < real_w; x++)
+             {
+                surface_crop[(y * real_w * bps) + (x * bps)] =
+                   surface[((y + y_off) * w  * bps) + ((x + x_off) * bps)];
+                surface_crop[(y * real_w * bps) + (x * bps) + 1] =
+	           surface[((y + y_off) * w  * bps) + ((x + x_off) * bps) + 1];
+	        surface_crop[(y * real_w * bps) + (x * bps) + 2] =
+	           surface[((y + y_off) * w  * bps) + ((x + x_off) * bps) + 2];
+             }
+          }
+          free(surface);
+	  surface = surface_crop;
+    }
+    // we don't need row pointers anymore
+    scanner->img_data = surface;
+    scanner->img_size = (int)(real_w * real_h * bps);
+    scanner->img_read = 0;
+finish:
+    return surface;
+}