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authorJörg Frings-Fürst <debian@jff-webhosting.net>2020-03-30 21:30:45 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2020-03-30 21:30:45 +0200
commitee770c2346eb37e0dcb8b6cf3eaacf3d8efd6bbc (patch)
tree58f05092be1a17a939e861f8cadcda1b6ca2ecef /backend/genesys_conv.c
parent0da9e21872802cfc6e975b1ebaf9efb9e5934d84 (diff)
parentfef76e17ed4c607ea73b81279f9ef1d7121be900 (diff)
Merge branch 'release/experimental/1.0.29-1_experimental1'experimental/1.0.29-1_experimental1
Diffstat (limited to 'backend/genesys_conv.c')
-rw-r--r--backend/genesys_conv.c478
1 files changed, 0 insertions, 478 deletions
diff --git a/backend/genesys_conv.c b/backend/genesys_conv.c
deleted file mode 100644
index 61f466e..0000000
--- a/backend/genesys_conv.c
+++ /dev/null
@@ -1,478 +0,0 @@
-/* sane - Scanner Access Now Easy.
-
- Copyright (C) 2005, 2006 Pierre Willenbrock <pierre@pirsoft.dnsalias.org>
- Copyright (C) 2010-2013 Stéphane Voltz <stef.dev@free.fr>
-
- This file is part of the SANE package.
-
- This program 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 2 of the
- License, or (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
-
- As a special exception, the authors of SANE give permission for
- additional uses of the libraries contained in this release of SANE.
-
- The exception is that, if you link a SANE library with other files
- to produce an executable, this does not by itself cause the
- resulting executable to be covered by the GNU General Public
- License. Your use of that executable is in no way restricted on
- account of linking the SANE library code into it.
-
- This exception does not, however, invalidate any other reasons why
- the executable file might be covered by the GNU General Public
- License.
-
- If you submit changes to SANE to the maintainers to be included in
- a subsequent release, you agree by submitting the changes that
- those changes may be distributed with this exception intact.
-
- If you write modifications of your own for SANE, it is your choice
- whether to permit this exception to apply to your modifications.
- If you do not wish that, delete this exception notice.
-*/
-
-/*
- * Conversion filters for genesys backend
- */
-
-
-/*8 bit*/
-#define SINGLE_BYTE
-#define BYTES_PER_COMPONENT 1
-#define COMPONENT_TYPE uint8_t
-
-#define FUNC_NAME(f) f ## _8
-
-#include "genesys_conv_hlp.c"
-
-#undef FUNC_NAME
-
-#undef COMPONENT_TYPE
-#undef BYTES_PER_COMPONENT
-#undef SINGLE_BYTE
-
-/*16 bit*/
-#define DOUBLE_BYTE
-#define BYTES_PER_COMPONENT 2
-#define COMPONENT_TYPE uint16_t
-
-#define FUNC_NAME(f) f ## _16
-
-#include "genesys_conv_hlp.c"
-
-#undef FUNC_NAME
-
-#undef COMPONENT_TYPE
-#undef BYTES_PER_COMPONENT
-#undef DOUBLE_BYTE
-
-static SANE_Status
-genesys_reverse_bits(
- uint8_t *src_data,
- uint8_t *dst_data,
- size_t bytes)
-{
- size_t i;
- for(i = 0; i < bytes; i++) {
- *dst_data++ = ~ *src_data++;
- }
- return SANE_STATUS_GOOD;
-}
-
-/**
- * uses the threshold/threshold_curve to control software binarization
- * This code was taken from the epjistsu backend by m. allan noah
- * @param dev device set up for the scan
- * @param src pointer to raw data
- * @param dst pointer where to store result
- * @param width width of the processed line
- * */
-static SANE_Status
-binarize_line(Genesys_Device * dev, uint8_t *src, uint8_t *dst, int width)
-{
- int j, windowX, sum = 0;
- int thresh;
- int offset, addCol, dropCol;
- unsigned char mask;
-
- int x;
- uint8_t min, max;
-
- /* normalize line */
- min = 255;
- max = 0;
- for (x = 0; x < width; x++)
- {
- if (src[x] > max)
- {
- max = src[x];
- }
- if (src[x] < min)
- {
- min = src[x];
- }
- }
-
- /* safeguard against dark or white areas */
- if(min>80)
- min=0;
- if(max<80)
- max=255;
- for (x = 0; x < width; x++)
- {
- src[x] = ((src[x] - min) * 255) / (max - min);
- }
-
- /* ~1mm works best, but the window needs to have odd # of pixels */
- windowX = (6 * dev->settings.xres) / 150;
- if (!(windowX % 2))
- windowX++;
-
- /* second, prefill the sliding sum */
- for (j = 0; j < windowX; j++)
- sum += src[j];
-
- /* third, walk the input buffer, update the sliding sum, */
- /* determine threshold, output bits */
- for (j = 0; j < width; j++)
- {
- /* output image location */
- offset = j % 8;
- mask = 0x80 >> offset;
- thresh = dev->settings.threshold;
-
- /* move sum/update threshold only if there is a curve */
- if (dev->settings.threshold_curve)
- {
- addCol = j + windowX / 2;
- dropCol = addCol - windowX;
-
- if (dropCol >= 0 && addCol < width)
- {
- sum -= src[dropCol];
- sum += src[addCol];
- }
- thresh = dev->lineart_lut[sum / windowX];
- }
-
- /* use average to lookup threshold */
- if (src[j] > thresh)
- *dst &= ~mask; /* white */
- else
- *dst |= mask; /* black */
-
- if (offset == 7)
- dst++;
- }
-
- return SANE_STATUS_GOOD;
-}
-
-/**
- * software lineart using data from a 8 bit gray scan. We assume true gray
- * or monochrome scan as input.
- */
-static SANE_Status
-genesys_gray_lineart(
- Genesys_Device *dev,
- uint8_t *src_data,
- uint8_t *dst_data,
- size_t pixels,
- size_t lines,
- uint8_t threshold)
-{
- size_t y;
-
- DBG (DBG_io2, "genesys_gray_lineart: converting %lu lines of %lu pixels\n",
- (unsigned long)lines, (unsigned long)pixels);
- DBG (DBG_io2, "genesys_gray_lineart: threshold=%d\n",threshold);
-
- for (y = 0; y < lines; y++)
- {
- binarize_line (dev, src_data + y * pixels, dst_data, pixels);
- dst_data += pixels / 8;
- }
- return SANE_STATUS_GOOD;
-}
-
-/** @brief shrink or grow scanned data to fit the final scan size
- * This function shrinks the scanned data it the required resolution is lower than the hardware one,
- * or grows it in case it is the opposite like when motor resolution is higher than
- * sensor's one.
- */
-static SANE_Status
-genesys_shrink_lines_1 (
- uint8_t *src_data,
- uint8_t *dst_data,
- unsigned int lines,
- unsigned int src_pixels,
- unsigned int dst_pixels,
- unsigned int channels)
-{
- unsigned int dst_x, src_x, y, c, cnt;
- unsigned int avg[3], val;
- uint8_t *src = (uint8_t *) src_data;
- uint8_t *dst = (uint8_t *) dst_data;
-
- /* choose between case where me must reduce or grow the scanned data */
- if (src_pixels > dst_pixels)
- {
- /* shrink data */
- /* TODO action must be taken at bit level, no bytes */
- src_pixels /= 8;
- dst_pixels /= 8;
- /*take first _byte_ */
- for (y = 0; y < lines; y++)
- {
- cnt = src_pixels / 2;
- src_x = 0;
- for (dst_x = 0; dst_x < dst_pixels; dst_x++)
- {
- while (cnt < src_pixels && src_x < src_pixels)
- {
- cnt += dst_pixels;
-
- for (c = 0; c < channels; c++)
- avg[c] = *src++;
- src_x++;
- }
- cnt -= src_pixels;
-
- for (c = 0; c < channels; c++)
- *dst++ = avg[c];
- }
- }
- }
- else
- {
- /* common case where y res is double x res */
- for (y = 0; y < lines; y++)
- {
- if (2 * src_pixels == dst_pixels)
- {
- /* double and interleave on line */
- for (c = 0; c < src_pixels/8; c++)
- {
- /* first 4 bits */
- val = 0;
- val |= (*src & 0x80) >> 0; /* X___ ____ --> X___ ____ */
- val |= (*src & 0x80) >> 1; /* X___ ____ --> _X__ ____ */
- val |= (*src & 0x40) >> 1; /* _X__ ____ --> __X_ ____ */
- val |= (*src & 0x40) >> 2; /* _X__ ____ --> ___X ____ */
- val |= (*src & 0x20) >> 2; /* __X_ ____ --> ____ X___ */
- val |= (*src & 0x20) >> 3; /* __X_ ____ --> ____ _X__ */
- val |= (*src & 0x10) >> 3; /* ___X ____ --> ____ __X_ */
- val |= (*src & 0x10) >> 4; /* ___X ____ --> ____ ___X */
- *dst = val;
- dst++;
-
- /* last for bits */
- val = 0;
- val |= (*src & 0x08) << 4; /* ____ X___ --> X___ ____ */
- val |= (*src & 0x08) << 3; /* ____ X___ --> _X__ ____ */
- val |= (*src & 0x04) << 3; /* ____ _X__ --> __X_ ____ */
- val |= (*src & 0x04) << 2; /* ____ _X__ --> ___X ____ */
- val |= (*src & 0x02) << 2; /* ____ __X_ --> ____ X___ */
- val |= (*src & 0x02) << 1; /* ____ __X_ --> ____ _X__ */
- val |= (*src & 0x01) << 1; /* ____ ___X --> ____ __X_ */
- val |= (*src & 0x01) << 0; /* ____ ___X --> ____ ___X */
- *dst = val;
- dst++;
- src++;
- }
- }
- else
- {
- /* TODO: since depth is 1, we must interpolate bit within bytes */
- DBG (DBG_warn, "%s: inaccurate bit expansion!\n", __func__);
- cnt = dst_pixels / 2;
- dst_x = 0;
- for (src_x = 0; src_x < src_pixels; src_x++)
- {
- for (c = 0; c < channels; c++)
- avg[c] = *src++;
- while (cnt < dst_pixels && dst_x < dst_pixels)
- {
- cnt += src_pixels;
- for (c = 0; c < channels; c++)
- *dst++ = avg[c];
- dst_x++;
- }
- cnt -= dst_pixels;
- }
- }
- }
- }
-
- return SANE_STATUS_GOOD;
-}
-
-
-/** Look in image for likely left/right/bottom paper edges, then crop image.
- * Since failing to crop isn't fatal, we always return SANE_STATUS_GOOD .
- */
-static SANE_Status
-genesys_crop(Genesys_Scanner *s)
-{
- SANE_Status status;
- Genesys_Device *dev = s->dev;
- int top = 0;
- int bottom = 0;
- int left = 0;
- int right = 0;
-
- DBG (DBG_proc, "%s: start\n", __func__);
-
- /* first find edges if any */
- status = sanei_magic_findEdges (&s->params,
- dev->img_buffer,
- dev->settings.xres,
- dev->settings.yres,
- &top,
- &bottom,
- &left,
- &right);
- if (status != SANE_STATUS_GOOD)
- {
- DBG (DBG_info, "%s: bad or no edges, bailing\n", __func__);
- goto cleanup;
- }
- DBG (DBG_io, "%s: t:%d b:%d l:%d r:%d\n", __func__, top, bottom, left,
- right);
-
- /* now crop the image */
- status =
- sanei_magic_crop (&(s->params), dev->img_buffer, top, bottom, left, right);
- if (status)
- {
- DBG (DBG_warn, "%s: failed to crop\n", __func__);
- goto cleanup;
- }
-
- /* update counters to new image size */
- dev->total_bytes_to_read = s->params.bytes_per_line * s->params.lines;
-
-cleanup:
- DBG (DBG_proc, "%s: completed\n", __func__);
- return SANE_STATUS_GOOD;
-}
-
-/** Look in image for likely upper and left paper edges, then rotate
- * image so that upper left corner of paper is upper left of image.
- * @return since failure doens't prevent scanning, we always return
- * SANE_STATUS_GOOD
- */
-static SANE_Status
-genesys_deskew(Genesys_Scanner *s)
-{
- SANE_Status status;
- Genesys_Device *dev = s->dev;
-
- int x = 0, y = 0, bg;
- double slope = 0;
-
- DBG (DBG_proc, "%s: start\n", __func__);
-
- bg=0;
- if(s->params.format==SANE_FRAME_GRAY && s->params.depth == 1)
- {
- bg=0xff;
- }
- status = sanei_magic_findSkew (&s->params,
- dev->img_buffer,
- dev->sensor.optical_res,
- dev->sensor.optical_res,
- &x,
- &y,
- &slope);
- if (status!=SANE_STATUS_GOOD)
- {
- DBG (DBG_error, "%s: bad findSkew, bailing\n", __func__);
- return SANE_STATUS_GOOD;
- }
- DBG(DBG_info, "%s: slope=%f => %f\n",__func__,slope, (slope/M_PI_2)*90);
- /* rotate image slope is in [-PI/2,PI/2]
- * positive values rotate trigonometric direction wise */
- status = sanei_magic_rotate (&s->params,
- dev->img_buffer,
- x,
- y,
- slope,
- bg);
- if (status!=SANE_STATUS_GOOD)
- {
- DBG (DBG_error, "%s: rotate error: %s", __func__, sane_strstatus(status));
- }
-
- DBG (DBG_proc, "%s: completed\n", __func__);
- return SANE_STATUS_GOOD;
-}
-
-/** remove lone dots
- * @return since failure doens't prevent scanning, we always return
- * SANE_STATUS_GOOD
- */
-static SANE_Status
-genesys_despeck(Genesys_Scanner *s)
-{
- if(sanei_magic_despeck(&s->params,
- s->dev->img_buffer,
- s->val[OPT_DESPECK].w)!=SANE_STATUS_GOOD)
- {
- DBG (DBG_error, "%s: bad despeck, bailing\n",__func__);
- }
-
- return SANE_STATUS_GOOD;
-}
-
-/** Look if image needs rotation and apply it
- * */
-static SANE_Status
-genesys_derotate (Genesys_Scanner * s)
-{
- SANE_Status status;
- int angle = 0;
- int resolution = s->val[OPT_RESOLUTION].w;
-
- DBGSTART;
- status = sanei_magic_findTurn (&s->params,
- s->dev->img_buffer,
- resolution,
- resolution,
- &angle);
-
- if (status)
- {
- DBG (DBG_warn, "%s: failed : %d\n", __func__, status);
- DBGCOMPLETED;
- return SANE_STATUS_GOOD;
- }
-
- /* apply rotation angle found */
- status = sanei_magic_turn (&s->params, s->dev->img_buffer, angle);
- if (status)
- {
- DBG (DBG_warn, "%s: failed : %d\n", __func__, status);
- DBGCOMPLETED;
- return SANE_STATUS_GOOD;
- }
-
- /* update counters to new image size */
- s->dev->total_bytes_to_read = s->params.bytes_per_line * s->params.lines;
-
- DBGCOMPLETED;
- return SANE_STATUS_GOOD;
-}
-
-/* vim: set sw=2 cino=>2se-1sn-1s{s^-1st0(0u0 smarttab expandtab: */