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Code Issues Releases Wiki Activity

get_row_run_lengths() now fills in an array of run_t to provide more information.

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This commit is contained in:
Eric Smith 2003-02-23 17:40:41 +00:00
parent 916b305792
commit 8c877216d9
2 changed files with 22 additions and 6 deletions
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16
bitblt.c
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@ -4,7 +4,7 @@
* will be compressed using ITU-T T.6 (G4) fax encoding.
*
* bitblt routines
* $Id: bitblt.c,v 1.12 2003/02/20 04:11:06 eric Exp $
* $Id: bitblt.c,v 1.13 2003/02/23 09:40:41 eric Exp $
* Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
*
* This program is free software; you can redistribute it and/or modify
@ -730,7 +730,7 @@ int32_t get_row_run_lengths (Bitmap *src,
int32_t y,
int32_t min_x, int32_t max_x,
int32_t max_runs,
uint32_t *run_length)
run_t *runs)
{
uint8_t *byte_ptr;
uint8_t byte;
@ -742,6 +742,7 @@ int32_t get_row_run_lengths (Bitmap *src,
uint8_t pol = 0x00; /* 0x00 = counting zeros (white),
0xff = counting ones (black) */
int32_t left = 0; /* left x coordinate of current run, relative */
uint32_t rl;
int32_t i = 0;
@ -780,7 +781,11 @@ int32_t get_row_run_lengths (Bitmap *src,
if (last_flag)
{
if (rl)
run_length [i++] = rl;
{
runs [i].value = pol;
runs [i].left = left;
runs [i++].width = rl;
}
return (i);
}
bit_pos = 0;
@ -794,7 +799,10 @@ int32_t get_row_run_lengths (Bitmap *src,
}
else
{
run_length [i++] = rl;
runs [i].value = pol;
runs [i].left = left;
runs [i++].width = rl;
left += rl;
if (i == max_runs)
return (-i);
rl = 0;

12
bitblt.h
View File

@ -4,7 +4,7 @@
* will be compressed using ITU-T T.6 (G4) fax encoding.
*
* bitblt routines
* $Id: bitblt.h,v 1.11 2003/02/20 04:11:06 eric Exp $
* $Id: bitblt.h,v 1.12 2003/02/23 09:40:41 eric Exp $
* Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
*
* This program is free software; you can redistribute it and/or modify
@ -115,8 +115,16 @@ void reverse_bits (uint8_t *p, int byte_count);
* Returns the actual number of runs counted, or -max_runs if there
* was not enough room in the array.
*/
typedef struct
{
bool value;
int32_t left;
uint32_t width;
} run_t;
int32_t get_row_run_lengths (Bitmap *src,
int32_t y,
int32_t min_x, int32_t max_x,
int32_t max_runs,
uint32_t *run_length);
run_t *runs);