kopia lustrzana https://gitlab.com/sane-project/backends
103 wiersze
3.6 KiB
C
103 wiersze
3.6 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.
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If not, see <https://www.gnu.org/licenses/>.
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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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double ratio = 1.0;
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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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ratio = (double)w / (double)scanner->caps[scanner->source].width;
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scanner->caps[scanner->source].width = w;
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if (scanner->caps[scanner->source].pos_x < 0)
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scanner->caps[scanner->source].pos_x = 0;
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if (scanner->caps[scanner->source].pos_x &&
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(scanner->caps[scanner->source].width >
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scanner->caps[scanner->source].pos_x))
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x_off = (int)((double)scanner->caps[scanner->source].pos_x * ratio);
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real_w = scanner->caps[scanner->source].width - x_off;
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scanner->caps[scanner->source].height = h;
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if (scanner->caps[scanner->source].pos_y &&
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(scanner->caps[scanner->source].height >
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scanner->caps[scanner->source].pos_y))
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y_off = (int)((double)scanner->caps[scanner->source].pos_y * ratio);
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real_h = scanner->caps[scanner->source].height - y_off;
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DBG( 1, "Escl Image Crop [%dx%d|%dx%d]\n", scanner->caps[scanner->source].pos_x, scanner->caps[scanner->source].pos_y,
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scanner->caps[scanner->source].width, scanner->caps[scanner->source].height);
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*width = real_w;
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*height = real_h;
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DBG( 1, "Escl Image Crop [%dx%d]\n", *width, *height);
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if (x_off > 0 || real_w < scanner->caps[scanner->source].width ||
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y_off > 0 || real_h < scanner->caps[scanner->source].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 * bps) + (x * bps)] =
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surface[((y + y_off) * w * bps) + ((x + x_off) * bps)];
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surface_crop[(y * real_w * bps) + (x * bps) + 1] =
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surface[((y + y_off) * w * bps) + ((x + x_off) * bps) + 1];
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surface_crop[(y * real_w * bps) + (x * bps) + 2] =
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surface[((y + y_off) * w * bps) + ((x + x_off) * bps) + 2];
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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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