diff options
Diffstat (limited to 'backend/escl/escl_crop.c')
| -rw-r--r-- | backend/escl/escl_crop.c | 102 |
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; +} |