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authorJörg Frings-Fürst <debian@jff-webhosting.net>2020-09-10 19:11:27 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2020-09-10 19:11:27 +0200
commit7e9455b3b15671ff99ed168638c405e2acedb6df (patch)
tree444e59ece236e09dc153f665e42160aeb0208c24 /backend/escl/escl_crop.c
parentbc8a517abd2e11e1435f4ef042cfcc8648b62ef7 (diff)
parentbce41b3c37c2a68e7dab234ce0247755a61ceb40 (diff)
Merge branch 'release/debian/1.0.31-1_experimental1' into masterdebian/1.0.31-1_experimental1
Diffstat (limited to 'backend/escl/escl_crop.c')
-rw-r--r--backend/escl/escl_crop.c102
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;
+}