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fix jp2k pyramid generation

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8.11.1 broke it, unfortunately
This commit is contained in:
John Cupitt 2021-07-02 17:19:27 +01:00
parent 951e900a32
commit d4c5556c83
1 changed files with 58 additions and 21 deletions
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79
libvips/foreign/vips2tiff.c
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@ -1907,6 +1907,62 @@ write_strip( VipsRegion *region, VipsRect *area, void *a )
#define CopyField( tag, v ) \
if( TIFFGetField( in, tag, &v ) ) TIFFSetField( out, tag, v )
static int
wtiff_copy_tiles( Wtiff *wtiff, TIFF *out, TIFF *in )
{
const ttile_t n_tiles = TIFFNumberOfTiles( in );
tsize_t tile_size;
tdata_t buf;
ttile_t i;
if( wtiff->compression == COMPRESSION_JPEG )
tile_size = TIFFTileSize( in );
else
/* If we will be copying raw tiles we need a buffer large
* enough to hold the largest compressed tile in any page.
*
* Allocate a buffer 2x the uncompressed tile size ... much
* simpler than searching every page for the largest tile with
* TIFFTAG_TILEBYTECOUNTS.
*/
tile_size = 2 * wtiff->tls * wtiff->tileh;
buf = vips_malloc( NULL, tile_size );
for( i = 0; i < n_tiles; i++ ) {
tsize_t len;
/* If this is a JPEG-compressed TIFF, we need to decompress
* and recompress, since tiles are actually written in several
* places (coefficients go in the tile, huffman tables go
* elsewhere).
*
* For all other compression types, we can just use
* TIFFReadRawTile()/TIFFWriteRawTile().
*/
if( wtiff->compression == COMPRESSION_JPEG ) {
len = TIFFReadEncodedTile( in, i, buf, tile_size );
if( len <= 0 ||
TIFFWriteEncodedTile( out, i, buf, len ) < 0 ) {
g_free( buf );
return( -1 );
}
}
else {
len = TIFFReadRawTile( in, i, buf, tile_size );
if( len <= 0 ||
TIFFWriteRawTile( out, i, buf, len ) < 0 ) {
g_free( buf );
return( -1 );
}
}
}
g_free( buf );
return( 0 );
}
/* Copy a TIFF file ... we know we wrote it, so just copy the tags we know
* we might have set.
*/
@ -1917,9 +1973,6 @@ wtiff_copy_tiff( Wtiff *wtiff, TIFF *out, TIFF *in )
uint16 ui16;
uint16 ui16_2;
float f;
tdata_t buf;
ttile_t tile_no;
ttile_t n;
uint16 *a;
/* All the fields we might have set.
@ -2004,24 +2057,8 @@ wtiff_copy_tiff( Wtiff *wtiff, TIFF *out, TIFF *in )
wtiff_embed_imagedescription( wtiff, out ) )
return( -1 );
buf = vips_malloc( NULL, TIFFTileSize( in ) );
n = TIFFNumberOfTiles( in );
for( tile_no = 0; tile_no < n; tile_no++ ) {
tsize_t len;
/* TIFFReadRawTile()/TIFFWriteRawTile() would save us
* decompress/recompress, but they won't work for
* JPEG-compressed tiles since they won't copy the
* JPEG quant tables we need.
*/
len = TIFFReadEncodedTile( in, tile_no, buf, -1 );
if( len < 0 ||
TIFFWriteEncodedTile( out, tile_no, buf, len ) < 0 ) {
g_free( buf );
return( -1 );
}
}
g_free( buf );
if( wtiff_copy_tiles( wtiff, out, in ) )
return( -1 );
return( 0 );
}