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alloc larger tiles for tiff read

This commit is contained in:
John Cupitt 2013-09-26 21:50:06 +01:00
parent d28fe365a6
commit 608170f00e
2 changed files with 17 additions and 6 deletions
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2
TODO
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@ -1,5 +1,3 @@
- assert fail with john.tif
- finish hist_ismonotonic()
needs im_conv()

21
libvips/foreign/tiff2vips.c
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@ -442,7 +442,7 @@ guess_format( ReadTiff *rtiff )
break;
}
vips_error( "tiff2vips", "%s", _( "unsupported image format\n" ) );
vips_error( "tiff2vips", "%s", _( "unsupported tiff image type\n" ) );
return( VIPS_FORMAT_NOTSET );
}
@ -1031,6 +1031,19 @@ parse_header( ReadTiff *rtiff, VipsImage *out )
return( 0 );
}
/* The size of the buffer written by TIFFReadTile(). We can't use
* TIFFTileSize() since that ignores the setting of TIFFTAG_JPEGCOLORMODE. If
* this pseudo tag has been set and the tile is encoded with YCbCr, the tile
* is returned with chrominance upsampled.
*
* This seems not to happen for old-style jpeg-compressed tiles.
*/
static size_t
tiff_tile_size( ReadTiff *rtiff )
{
return( TIFFTileRowSize( rtiff->tiff ) * rtiff->theight );
}
/* Allocate a tile buffer. Have one of these for each thread so we can unpack
* to vips in parallel.
*/
@ -1041,7 +1054,7 @@ tiff_seq_start( VipsImage *out, void *a, void *b )
tsize_t size;
tdata_t *buf;
size = TIFFTileSize( rtiff->tiff );
size = tiff_tile_size( rtiff );
if( !(buf = vips_malloc( NULL, size )) )
return( NULL );
@ -1096,7 +1109,7 @@ tiff_fill_region( VipsRegion *out, void *seq, void *a, void *b, gboolean *stop )
/* Sizeof a line of bytes in the TIFF tile.
*/
int tls = TIFFTileSize( rtiff->tiff ) / rtiff->theight;
int tls = tiff_tile_size( rtiff ) / rtiff->theight;
/* Sizeof a pel in the TIFF file. This won't work for formats which
* are <1 byte per pel, like onebit :-( Fortunately, it's only used
@ -1212,7 +1225,7 @@ read_tilewise( ReadTiff *rtiff, VipsImage *out )
vips_tile_size = VIPS_IMAGE_SIZEOF_PEL( raw ) *
rtiff->twidth * rtiff->theight;
if( TIFFTileSize( rtiff->tiff ) != vips_tile_size ) {
if( tiff_tile_size( rtiff ) != vips_tile_size ) {
vips_error( "tiff2vips",
"%s", _( "unsupported tiff image type" ) );
return( -1 );