kopia lustrzana https://gitlab.com/sane-project/backends
90 wiersze
2.6 KiB
C
90 wiersze
2.6 KiB
C
/* sane - Scanner Access Now Easy.
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Copyright (C) 2020 Thierry HUCHARD <thierry@ordissimo.com>
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This file is part of the SANE package.
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SANE is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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SANE is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with sane; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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This file implements a SANE backend for eSCL scanners. */
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#define DEBUG_DECLARE_ONLY
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#include "../include/sane/config.h"
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#include "escl.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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unsigned char *
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escl_crop_surface(capabilities_t *scanner,
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unsigned char *surface,
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int w,
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int h,
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int bps,
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int *width,
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int *height)
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{
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int x_off = 0, x = 0;
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int real_w = 0;
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int y_off = 0, y = 0;
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int real_h = 0;
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unsigned char *surface_crop = NULL;
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DBG( 1, "Escl Image Crop\n");
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if (w < (int)scanner->width)
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scanner->width = w;
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if (scanner->pos_x < 0)
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scanner->pos_x = 0;
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if (h < (int)scanner->height)
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scanner->height = h;
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if (scanner->pos_x < 0)
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scanner->pos_x = 0;
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x_off = scanner->pos_x;
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real_w = scanner->width - x_off;
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y_off = scanner->pos_y;
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real_h = scanner->height - y_off;
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*width = real_w;
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*height = real_h;
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if (x_off > 0 || real_w < scanner->width ||
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y_off > 0 || real_h < scanner->height) {
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surface_crop = (unsigned char *)malloc (sizeof (unsigned char) * real_w
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* real_h * bps);
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if(!surface_crop) {
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DBG( 1, "Escl Crop : Surface_crop Memory allocation problem\n");
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free(surface);
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surface = NULL;
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goto finish;
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}
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for (y = 0; y < real_h; y++)
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{
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for (x = 0; x < real_w; x++)
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{
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surface_crop[y * real_w + x] = surface[(y + y_off) * w + x + x_off];
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}
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}
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free(surface);
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surface = surface_crop;
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}
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// we don't need row pointers anymore
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scanner->img_data = surface;
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scanner->img_size = (int)(real_w * real_h * bps);
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scanner->img_read = 0;
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finish:
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return surface;
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}
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