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pixma: fix for 2400 dpi striping on MP760/770/780/790 by Gernot Hassenpflug. 

modified:   ChangeLog
	modified:   backend/pixma_mp750.c
merge-requests/1/head
Nicolas Martin 2010-09-07 21:46:55 +02:00
rodzic 018412102e
commit 3dd2b12f6e
2 zmienionych plików z 21 dodań i 6 usunięć
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4
ChangeLog
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@ -1,3 +1,7 @@
2010-09-07 Nicolas Martin <nicols-guest at users.alioth.debian.org>
* backend/pixma_mp750.c:
pixma: fix for 2400 dpi striping on MP760/770/780/790 by Gernot Hassenpflug.
2010-09-05 Nicolas Martin <nicols-guest at users.alioth.debian.org>
* doc/sane-pixma.man:
pixma: man page update for devices as reported by Gernot Hassenpflug.

23
backend/pixma_mp750.c
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@ -109,6 +109,7 @@ typedef struct mp750_t
uint8_t *buf, *rawimg, *img;
unsigned rawimg_left, imgbuf_len, last_block_size, imgbuf_ofs;
int shifted_bytes;
int stripe_shift; /* for 2400dpi */
unsigned last_block;
unsigned monochrome:1;
@ -408,13 +409,17 @@ step1 (pixma_t * s)
static void
shift_rgb (const uint8_t * src, unsigned pixels,
int sr, int sg, int sb, uint8_t * dst)
int sr, int sg, int sb, int stripe_shift,
int line_size, uint8_t * dst)
{
unsigned st;
for (; pixels != 0; pixels--)
{
*(dst++ + sr) = *src++;
*(dst++ + sg) = *src++;
*(dst++ + sb) = *src++;
st = (pixels % 2 == 0) ? -2 * stripe_shift * line_size : 0;
*(dst++ + sr + st) = *src++;
*(dst++ + sg + st) = *src++;
*(dst++ + sb + st) = *src++;
}
}
@ -578,7 +583,12 @@ mp750_scan (pixma_t * s)
mp->raw_width = ALIGN_SUP (s->param->w, 4);
dpi = s->param->ydpi;
spare = 2 * calc_component_shifting (s); /* FIXME: or maybe (2*... + 1)? */
/* add a stripe shift for 2400dpi */
mp->stripe_shift = (dpi == 2400) ? 4 : 0;
/* modify for stripe shift */
spare = 2 * calc_component_shifting (s) + 2 * mp->stripe_shift; /* FIXME: or maybe (2*... + 1)? */
mp->raw_height = s->param->h + spare;
PDBG (pixma_dbg (3, "raw_width=%u raw_height=%u dpi=%u\n",
mp->raw_width, mp->raw_height, dpi));
@ -746,7 +756,8 @@ mp750_fill_buffer (pixma_t * s, pixma_imagebuf_t * ib)
n = mp->rawimg_left / 3;
/* n = number of pixels in the buffer */
shift_rgb (mp->rawimg, n, shift[0], shift[1], shift[2],
mp->img + mp->imgbuf_ofs);
mp->stripe_shift, s->param->line_size,
mp->img + mp->imgbuf_ofs);
n *= 3;
mp->shifted_bytes += n;
mp->rawimg_left -= n; /* rawimg_left = 0, 1 or 2 bytes left in the buffer. */