kopia lustrzana https://gitlab.com/sane-project/backends
96 wiersze
4.6 KiB
C
96 wiersze
4.6 KiB
C
/* sane - Scanner Access Now Easy.
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pieusb_buffer.h
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Copyright (C) 2012-2015 Jan Vleeshouwers, Michael Rickmann, Klaus Kaempf
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This file is part of the SANE package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 this program. If not, see <https://www.gnu.org/licenses/>.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice. */
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#ifndef PIEUSB_BUFFER_H
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#define PIEUSB_BUFFER_H
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#include "pieusb.h"
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#include "../include/sane/sanei_ir.h"
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#ifndef L_tmpnam
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#define L_tmpnam 20
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#endif
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struct Pieusb_Read_Buffer
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{
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SANE_Uint* data; /* image data - always store as 16 bit values; mmap'ed */
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unsigned int data_size; /* size of mmap region */
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SANE_Int data_file; /* associated file if memory mapped */
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char buffer_name[L_tmpnam];
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/* Buffer parameters */
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SANE_Int width; /* number of pixels on a line */
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SANE_Int height; /* number of lines in buffer */
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SANE_Int colors; /* number of colors in a pixel */
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SANE_Int depth; /* number of bits of a color */
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SANE_Int packing_density; /* number of single color samples packed together */
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/* Derived quantities
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* All derived quantities pertain to the image, not to the buffer */
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SANE_Int packet_size_bytes; /* number of bytes of a packet of samples = round_up(depth*packing_density/8) */
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SANE_Int line_size_packets; /* number of packets on a single color line = round-down((width+packing_density-1)/packing_density) */
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SANE_Int line_size_bytes; /* number of bytes on a single color line = line_size_packets*packet_size_bytes */
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SANE_Int image_size_bytes; /* total number of bytes in the buffer (= colors * height * line_size_packets* packet_size_bytes) */
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SANE_Int color_index_red; /* color index of the red color plane (-1 if not used) */
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SANE_Int color_index_green; /* color index of the green color plane (-1 if not used) */
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SANE_Int color_index_blue; /* color index of the blue color plane (-1 if not used) */
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SANE_Int color_index_infrared; /* color index of the infrared color plane (-1 if not used) */
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/* Reading - byte oriented */
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SANE_Uint** p_read; /* array of pointers to next sample to read for each color plane */
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SANE_Int read_index[4]; /* location where to read next (color-index, height-index, width-index, byte-index) */
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SANE_Int bytes_read; /* number of bytes read from the buffer */
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SANE_Int bytes_unread; /* number of bytes not yet read from the buffer */
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SANE_Int bytes_written; /* number of bytes written to the buffer */
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/* Writing */
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SANE_Uint** p_write; /* array of pointers to next byte to write for each color plane */
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};
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void sanei_pieusb_buffer_get(struct Pieusb_Read_Buffer* buffer, SANE_Byte* data, SANE_Int max_len, SANE_Int* len);
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SANE_Status sanei_pieusb_buffer_create(struct Pieusb_Read_Buffer* buffer, SANE_Int width, SANE_Int height, SANE_Byte colors, SANE_Byte depth);
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void sanei_pieusb_buffer_delete(struct Pieusb_Read_Buffer* buffer);
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SANE_Int sanei_pieusb_buffer_put_full_color_line(struct Pieusb_Read_Buffer* buffer, void* line, int size);
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SANE_Int sanei_pieusb_buffer_put_single_color_line(struct Pieusb_Read_Buffer* buffer, SANE_Byte color, void* line, SANE_Int size);
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#endif /* PIEUSB_BUFFER_H */
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