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Move common RLE code to function

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This commit is contained in:
Henri Chain 2016-05-23 18:21:13 +02:00
parent 922b237d9e
commit d2c4bbeda2
2 changed files with 27 additions and 80 deletions
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105
libvips/foreign/radiance.c
View File

@ -814,29 +814,16 @@ scanline_read( Buffer *buffer, COLR *scanline, int width )
*/
#define MAX_LINE (2 * MAXELEN * sizeof( COLR ))
/* Write a single scanline.
/* write an RLE scanline. Write magic header.
*/
static int
scanline_write( COLR *scanline, int width, FILE *fp )
static void
rle_scanline_write( COLR *scanline, int width, unsigned char *buffer, int *buffer_pos )
{
unsigned char buffer[MAX_LINE];
int buffer_pos = 0;
#define PUTC( CH ) { \
buffer[buffer_pos++] = (CH); \
g_assert( buffer_pos <= MAX_LINE ); \
buffer[(*buffer_pos)++] = (CH); \
g_assert( *buffer_pos <= MAX_LINE ); \
}
int i, j, beg, cnt;
if( width < MINELEN ||
width > MAXELEN )
/* Write as a flat scanline.
*/
return( fwrite( scanline, sizeof( COLR ), width, fp ) - width );
/* An RLE scanline. Write magic header.
*/
PUTC( 2 );
PUTC( 2 );
PUTC( width >> 8 );
@ -889,6 +876,25 @@ scanline_write( COLR *scanline, int width, FILE *fp )
}
}
}
}
/* Write a single scanline.
*/
static int
scanline_write( COLR *scanline, int width, FILE *fp )
{
unsigned char buffer[MAX_LINE];
int buffer_pos = 0;
if( width < MINELEN ||
width > MAXELEN )
/* Write as a flat scanline.
*/
return( fwrite( scanline, sizeof( COLR ), width, fp ) - width );
/* An RLE scanline.
*/
rle_scanline_write( scanline, width, buffer, &buffer_pos );
return( fwrite( buffer, 1, buffer_pos, fp ) - buffer_pos );
}
@ -1439,16 +1445,9 @@ scanline_write_buf( COLR *scanline, int width, WriteBuf *wbuf )
{
int buffer_pos = 0;
int i, j, beg, cnt;
write_buf_grow( wbuf, MAX_LINE );
unsigned char *buffer = (unsigned char *) wbuf->buf + wbuf->len;
#define PUTC_BUF( CH ) { \
buffer[buffer_pos++] = (CH); \
g_assert( buffer_pos <= MAX_LINE ); \
}
if( width < MINELEN ||
width > MAXELEN ) {
/* Write as a flat scanline.
@ -1458,60 +1457,10 @@ scanline_write_buf( COLR *scanline, int width, WriteBuf *wbuf )
return( 0 );
}
/* An RLE scanline. Write magic header.
/* An RLE scanline.
*/
PUTC( 2 );
PUTC( 2 );
PUTC( width >> 8 );
PUTC( width & 255 );
for( i = 0; i < 4; i++ ) {
for( j = 0; j < width; ) {
/* Not needed, but keeps gcc used-before-set wsrning
* quiet.
*/
cnt = 1;
/* Set beg / cnt to the start and length of the next
* run longer than MINRUN.
*/
for( beg = j; beg < width; beg += cnt ) {
for( cnt = 1;
cnt < 127 &&
beg + cnt < width &&
scanline[beg + cnt][i] ==
scanline[beg][i];
cnt++ )
;
if( cnt >= MINRUN )
break;
}
/* Code pixels leading up to the run as a set of
* non-runs.
*/
while( j < beg ) {
int len = VIPS_MIN( 128, beg - j );
COLR *p = scanline + j;
int k;
PUTC( len );
for( k = 0; k < len; k++ )
PUTC( p[k][i] );
j += len;
}
/* Code the run we found, if any
*/
if( cnt >= MINRUN ) {
PUTC( 128 + cnt );
PUTC( scanline[j][i] );
j += cnt;
}
}
}
rle_scanline_write( scanline, width, buffer, &buffer_pos );
wbuf->len += buffer_pos;
return( 0 );

2
libvips/foreign/radsave.c
View File

@ -125,7 +125,6 @@ static int
vips_foreign_save_rad_file_build( VipsObject *object )
{
VipsForeignSave *save = (VipsForeignSave *) object;
VipsForeignSaveRad *rad = (VipsForeignSaveRad *) object;
VipsForeignSaveRadFile *rad_file = (VipsForeignSaveRadFile *) object;
if( VIPS_OBJECT_CLASS( vips_foreign_save_rad_file_parent_class )->
@ -179,7 +178,6 @@ static int
vips_foreign_save_rad_buffer_build( VipsObject *object )
{
VipsForeignSave *save = (VipsForeignSave *) object;
VipsForeignSaveRad *rad = (VipsForeignSaveRad *) object;
void *obuf;
size_t olen;