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Merge pull request #1672 from MathemanFlo/master 

Added write functionality for 2 and 4 bit tiff
This commit is contained in:
John Cupitt 2020-06-16 16:18:22 +01:00 committed by GitHub
parent c307d3686f 0f0e8cb677
commit 63b8e162f8
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 267 additions and 38 deletions
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4
libvips/foreign/pforeign.h
View File

@ -53,7 +53,7 @@ int vips__tiff_write( VipsImage *in, const char *filename,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
int bitdepth,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,
@ -73,7 +73,7 @@ int vips__tiff_write_buf( VipsImage *in,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
int bitdepth,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,

121
libvips/foreign/tiff2vips.c
View File

@ -199,6 +199,8 @@
* - better handling of aligned reads in multipage tiffs
* 28/5/20
* - add subifd
* 06/6/20
* - add load functionality for 2 and 4 bit greyscale tiffs
*/
/*
@ -1056,6 +1058,78 @@ rtiff_onebit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
}
}
/* Per-scanline process function for 2 bit greyscale images.
*/
static void
rtiff_twobit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
{
int x, i, z;
int minisblack =
rtiff->header.photometric_interpretation == PHOTOMETRIC_MINISBLACK;
VipsPel twobits, fourbits, bits;
x = 0;
for( i = 0; i < (n >> 2); i++ ) {
bits = (VipsPel) minisblack ? p[i] : ~p[i];
for( z = 0; z < 4; z++ ) {
/* The grey shade is the value four times concatenated */
twobits = bits >> 6;
fourbits = twobits | (twobits << 2);
q[x] = fourbits | (fourbits << 4);
bits <<= 2;
x += 1;
}
}
/* Do last byte in line.
*/
if( n & 3 ) {
bits = (VipsPel) minisblack ? p[i] : ~p[i];
for( z = 0; z < (n & 3) ; z++ ) {
twobits = bits >> 6;
fourbits = twobits | (twobits << 2);
q[x + z] = fourbits | (fourbits << 4);
bits <<= 2;
}
}
}
/* Per-scanline process function for 4 bit greyscale images.
*/
static void
rtiff_fourbit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
{
int x, i, z;
int minisblack =
rtiff->header.photometric_interpretation == PHOTOMETRIC_MINISBLACK;
VipsPel bits;
x = 0;
for( i = 0; i < (n >> 1); i++ ) {
bits = (VipsPel) minisblack ? p[i] : ~p[i];
for( z = 0; z < 2; z++ ) {
/* The grey shade is the value two times concatenated */
q[x] = (bits & 0xF0) | (bits >> 4);
bits <<= 4;
x += 1;
}
}
/* Do last byte in line.
*/
if( n & 1) {
bits = (VipsPel) minisblack ? p[i] : ~p[i];
for( z = 0; z < (n & 1) ; z++ ) {
q[x + z] = (bits & 0xF0) | (bits >> 4);
bits <<= 4;
}
}
}
/* Read a 1-bit TIFF image.
*/
static int
@ -1075,6 +1149,44 @@ rtiff_parse_onebit( Rtiff *rtiff, VipsImage *out )
return( 0 );
}
/* Read a 2-bit TIFF image.
*/
static int
rtiff_parse_twobit( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_samples( rtiff, 1 ) ||
rtiff_check_bits( rtiff, 2 ) )
return( -1 );
out->Bands = 1;
out->BandFmt = VIPS_FORMAT_UCHAR;
out->Coding = VIPS_CODING_NONE;
out->Type = VIPS_INTERPRETATION_B_W;
rtiff->sfn = rtiff_twobit_line;
return( 0 );
}
/* Read a 4-bit TIFF image.
*/
static int
rtiff_parse_fourbit( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_samples( rtiff, 1 ) ||
rtiff_check_bits( rtiff, 4 ) )
return( -1 );
out->Bands = 1;
out->BandFmt = VIPS_FORMAT_UCHAR;
out->Coding = VIPS_CODING_NONE;
out->Type = VIPS_INTERPRETATION_B_W;
rtiff->sfn = rtiff_fourbit_line;
return( 0 );
}
/* Swap the sense of the first channel, if necessary.
*/
#define GREY_LOOP( TYPE, MAX ) { \
@ -1517,8 +1629,13 @@ rtiff_pick_reader( Rtiff *rtiff )
if( photometric_interpretation == PHOTOMETRIC_MINISWHITE ||
photometric_interpretation == PHOTOMETRIC_MINISBLACK ) {
if( bits_per_sample == 1 )
return( rtiff_parse_onebit );
if( bits_per_sample == 1)
return ( rtiff_parse_onebit );
else if ( bits_per_sample == 2 )
return ( rtiff_parse_twobit);
else if ( bits_per_sample == 4 )
return ( rtiff_parse_fourbit);
else
return( rtiff_parse_greyscale );
}

41
libvips/foreign/tiffsave.c
View File

@ -23,6 +23,8 @@
* - add "depth" to set pyr depth
* 12/5/20
* - add "subifd" to create pyr layers as sub-directories
* 8/6/20
* - add bitdepth support for 2 and 4 bit greyscale images
*/
/*
@ -89,6 +91,7 @@ typedef struct _VipsForeignSaveTiff {
int tile_height;
gboolean pyramid;
gboolean squash;
int bitdepth;
gboolean miniswhite;
VipsForeignTiffResunit resunit;
double xres;
@ -263,9 +266,16 @@ vips_foreign_save_tiff_class_init( VipsForeignSaveTiffClass *class )
VIPS_ARG_BOOL( class, "squash", 14,
_( "Squash" ),
_( "Squash images down to 1 bit" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
G_STRUCT_OFFSET( VipsForeignSaveTiff, squash ),
FALSE );
VIPS_ARG_INT( class, "bitdepth", 14,
_( "bitdepth" ),
_( "Change greyscale image bit depth to 1,2, 4 or 8." ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveTiff, bitdepth ),
1,8,8 );
VIPS_ARG_BOOL( class, "miniswhite", 14,
_( "Miniswhite" ),
@ -368,6 +378,7 @@ vips_foreign_save_tiff_init( VipsForeignSaveTiff *tiff )
tiff->level = 10;
tiff->lossless = FALSE;
tiff->depth = VIPS_FOREIGN_DZ_DEPTH_ONETILE;
tiff->bitdepth = 0;
}
typedef struct _VipsForeignSaveTiffFile {
@ -392,12 +403,17 @@ vips_foreign_save_tiff_file_build( VipsObject *object )
build( object ) )
return( -1 );
/* handle the deprecated squash parameter */
if( vips_object_argument_isset(object,"squash") ) {
tiff->bitdepth = 1; /*we set that even in the case of LAB to LABQ */
}
if( vips__tiff_write( save->ready, file->filename,
tiff->compression, tiff->Q, tiff->predictor,
tiff->profile,
tiff->tile, tiff->tile_width, tiff->tile_height,
tiff->pyramid,
tiff->squash,
tiff->bitdepth,
tiff->miniswhite,
tiff->resunit, tiff->xres, tiff->yres,
tiff->bigtiff,
@ -470,7 +486,7 @@ vips_foreign_save_tiff_buffer_build( VipsObject *object )
tiff->profile,
tiff->tile, tiff->tile_width, tiff->tile_height,
tiff->pyramid,
tiff->squash,
tiff->bitdepth,
tiff->miniswhite,
tiff->resunit, tiff->xres, tiff->yres,
tiff->bigtiff,
@ -540,6 +556,7 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
* * @tile_height: %gint for tile size
* * @pyramid: %gboolean, write an image pyramid
* * @squash: %gboolean, squash 8-bit images down to 1 bit
* * @bitdepth: %int, change bit depth to 1,2, or 4 bit
* * @miniswhite: %gboolean, write 1-bit images as MINISWHITE
* * @resunit: #VipsForeignTiffResunit for resolution unit
* * @xres: %gdouble horizontal resolution in pixels/mm
@ -605,10 +622,25 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
* MINISBLACK TIFFs where black is a 0 bit, but if you set @miniswhite, it
* will use 0 for a white bit. Many pre-press applications only work with
* images which use this sense. @miniswhite only affects one-bit images, it
* does nothing for greyscale images.
* does nothing for greyscale images. Consider @bitdepth for depths 1, 2 and 4.
*
* Set @squash to squash 3-band float CIELAB images down to 8-bit CIELAB.
*
* Set @bitdepth to make 8-bit uchar images write as 1,2 or 4-bit TIFFs.
* In case of depth 1: Values >128 are written as white, values <=128 as black.
* Normally vips will write MINISBLACK TIFFs where black is a 0 bit, but if you
* set @miniswhite, it will use 0 for a white bit. Many pre-press applications
* only work with images which use this sense. @miniswhite only affects one-bit
* images, it does nothing for greyscale images.
* In case of depth 2: The same holds but values < 64 are written as black.
* For 64 <= values < 128 they are written as dark grey, for 128 <= values < 192
* they are written as light gray and values above are written as white.
* In case @miniswhite is set to true this behavior is inverted.
* In case of depth 4: values < 16 are written as black, and so on for the
* lighter shades. In case @miniswhite is set to true this behavior is inverted.
*
* Set @bitdepth to 8 to squash 3-band float CIELAB images down to 8-bit CIELAB.
*
* Use @resunit to override the default resolution unit.
* The default
* resolution unit is taken from the header field
@ -673,6 +705,7 @@ vips_tiffsave( VipsImage *in, const char *filename, ... )
* * @tile_height: %gint for tile size
* * @pyramid: %gboolean, write an image pyramid
* * @squash: %gboolean, squash 8-bit images down to 1 bit
* * @bitdepth: %int, change bit depth to 1,2 or 4-bit or squash float to 8 bit
* * @miniswhite: %gboolean, write 1-bit images as MINISWHITE
* * @resunit: #VipsForeignTiffResunit for resolution unit
* * @xres: %gdouble horizontal resolution in pixels/mm

139
libvips/foreign/vips2tiff.c
View File

@ -195,8 +195,9 @@
* - add PAGENUMBER support
* 23/5/20
* - add support for subifd pyramid layers
* 8/6/20
* - add bitdepth support for 2 and 4 bit greyscale images
*/
/*
This file is part of VIPS.
@ -337,7 +338,7 @@ struct _Wtiff {
int tile; /* Tile or not */
int tilew, tileh; /* Tile size */
int pyramid; /* Wtiff pyramid */
int squash; /* Write as small format */
int bitdepth; /* Write as 1, 2 or 4 bit */
int miniswhite; /* Wtiff as 0 == white */
int resunit; /* Resolution unit (inches or cm) */
double xres; /* Resolution in X */
@ -694,13 +695,14 @@ wtiff_write_header( Wtiff *wtiff, Layer *layer )
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, 8 );
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_CIELAB );
}
else if( wtiff->squash ) {
else if( wtiff->bitdepth == 1 || wtiff->bitdepth == 2 ||
wtiff->bitdepth == 4 ) {
TIFFSetField( tif, TIFFTAG_SAMPLESPERPIXEL, 1 );
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, 1 );
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC,
wtiff->miniswhite ?
PHOTOMETRIC_MINISWHITE :
PHOTOMETRIC_MINISBLACK );
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, wtiff->bitdepth );
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC,
wtiff->miniswhite ?
PHOTOMETRIC_MINISWHITE :
PHOTOMETRIC_MINISBLACK );
}
else {
int photometric;
@ -1039,13 +1041,13 @@ ready_to_write( Wtiff *wtiff )
/* "squash" float LAB down to LABQ.
*/
if( wtiff->squash &&
if( wtiff->bitdepth &&
wtiff->input->Bands == 3 &&
wtiff->input->BandFmt == VIPS_FORMAT_FLOAT &&
wtiff->input->Type == VIPS_INTERPRETATION_LAB ) {
if( vips_Lab2LabQ( wtiff->input, &wtiff->ready, NULL ) )
return( -1 );
wtiff->squash = 0;
wtiff->bitdepth = 0;
}
else {
wtiff->ready = wtiff->input;
@ -1062,7 +1064,7 @@ wtiff_new( VipsImage *input, const char *filename,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
int bitdepth,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,
@ -1091,7 +1093,7 @@ wtiff_new( VipsImage *input, const char *filename,
wtiff->tilew = tile_width;
wtiff->tileh = tile_height;
wtiff->pyramid = pyramid;
wtiff->squash = squash;
wtiff->bitdepth = bitdepth;
wtiff->miniswhite = miniswhite;
wtiff->resunit = get_resunit( resunit );
wtiff->xres = xres;
@ -1188,23 +1190,30 @@ wtiff_new( VipsImage *input, const char *filename,
}
}
/* Can only squash 8 bit mono. 3-band float should have been squashed
* above.
if( wtiff->bitdepth && !(wtiff->bitdepth == 1 || wtiff->bitdepth == 2
|| wtiff->bitdepth == 4) ) {
g_warning( "%s",
_( "allows only bitdepth values 1,2 or 4. "
"-- disabling bitdepth") );
wtiff->bitdepth = 0;
}
/* Can only have byte fractional bit depths for 8 bit mono.
* 3-band float should have been packed above.
*/
if( wtiff->squash &&
!(wtiff->ready->Coding == VIPS_CODING_NONE &&
wtiff->ready->BandFmt == VIPS_FORMAT_UCHAR &&
wtiff->ready->Bands == 1) ) {
if( wtiff->bitdepth && !(wtiff->ready->Coding == VIPS_CODING_NONE &&
wtiff->ready->BandFmt == VIPS_FORMAT_UCHAR &&
wtiff->ready->Bands == 1) ) {
g_warning( "%s",
_( "can only squash 1-band uchar and "
"3-band float lab -- disabling squash" ) );
wtiff->squash = 0;
( "can only set bitdepth for 1-band uchar and "
"3-band float lab -- disabling bitdepth" ) );
wtiff->bitdepth = 0;
}
if( wtiff->squash &&
if( wtiff->bitdepth &&
wtiff->compression == COMPRESSION_JPEG ) {
g_warning( "%s",
_( "can't have 1-bit JPEG -- disabling JPEG" ) );
_( "can't have 1,2 or 4-bit JPEG -- disabling JPEG" ) );
wtiff->compression = COMPRESSION_NONE;
}
@ -1239,8 +1248,12 @@ wtiff_new( VipsImage *input, const char *filename,
*/
if( wtiff->ready->Coding == VIPS_CODING_LABQ )
wtiff->tls = wtiff->tilew * 3;
else if( wtiff->squash )
else if( wtiff->bitdepth == 1 )
wtiff->tls = VIPS_ROUND_UP( wtiff->tilew, 8 ) / 8;
else if( wtiff->bitdepth == 2 )
wtiff->tls = VIPS_ROUND_UP( wtiff->tilew, 4 ) / 4;
else if( wtiff->bitdepth == 4 )
wtiff->tls = VIPS_ROUND_UP( wtiff->tilew, 2 ) / 2;
else
wtiff->tls = VIPS_IMAGE_SIZEOF_PEL( wtiff->ready ) *
wtiff->tilew;
@ -1300,6 +1313,60 @@ eightbit2onebit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
*q++ = bits << (8 - (x & 0x7));
}
/* Pack 8 bit VIPS to 2 bit TIFF.
*/
static void
eightbit2twobit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
{
int x;
VipsPel bits;
VipsPel mask = wtiff->miniswhite ? 3 : 0;
bits = 0;
for( x = 0; x < n; x++ ) {
bits <<= 2;
bits |= (p[x] >> 6) ^ mask;
if( (x & 0x3) == 0x3 ) {
*q++ = bits;
bits = 0;
}
}
/* Any left-over bits? Need to be left-aligned.
*/
if( (x & 0x3) != 0 )
*q++ = (wtiff->miniswhite ? ~bits : bits) << (8 - ((x & 0x3) << 1));
}
/* Pack 8 bit VIPS to 4 bit TIFF.
*/
static void
eightbit2fourbit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
{
int x;
VipsPel bits;
VipsPel mask = wtiff->miniswhite ? 15 : 0;
bits = 0;
for( x = 0; x < n; x++ ) {
bits <<= 4;
bits |= (p[x] >> 4) ^ mask;
if( (x & 0x1) == 0x1 ) {
*q++ = bits;
bits = 0;
}
}
/* Any left-over bits? Need to be left-aligned.
*/
if( (x & 0x1) != 0 )
*q++ = ((VipsPel)(wtiff->miniswhite ? ~bits : bits))
<< (8 - ((x & 0x1) << 2));
}
/* Swap the sense of the first channel, if necessary.
*/
#define GREY_LOOP( TYPE, MAX ) { \
@ -1444,8 +1511,12 @@ wtiff_pack2tiff( Wtiff *wtiff, Layer *layer,
if( wtiff->ready->Coding == VIPS_CODING_LABQ )
LabQ2LabC( q, p, area->width );
else if( wtiff->squash )
else if( wtiff->bitdepth == 1 )
eightbit2onebit( wtiff, q, p, area->width );
else if( wtiff->bitdepth == 2 )
eightbit2twobit( wtiff, q, p, area->width );
else if( wtiff->bitdepth == 4 )
eightbit2fourbit( wtiff, q, p, area->width );
else if( wtiff->input->Type == VIPS_INTERPRETATION_XYZ )
XYZ2tiffxyz( q, p, area->width, in->im->Bands );
else if( (in->im->Bands == 1 || in->im->Bands == 2) &&
@ -1543,10 +1614,18 @@ wtiff_layer_write_strip( Wtiff *wtiff, Layer *layer, VipsRegion *strip )
XYZ2tiffxyz( wtiff->tbuf, p, im->Xsize, im->Bands );
p = wtiff->tbuf;
}
else if( wtiff->squash ) {
else if( wtiff->bitdepth == 1 ) {
eightbit2onebit( wtiff, wtiff->tbuf, p, im->Xsize );
p = wtiff->tbuf;
}
else if( wtiff->bitdepth == 2 ) {
eightbit2twobit( wtiff, wtiff->tbuf, p, im->Xsize );
p = wtiff->tbuf;
}
else if( wtiff->bitdepth == 4 ) {
eightbit2fourbit( wtiff, wtiff->tbuf, p, im->Xsize );
p = wtiff->tbuf;
}
else if( (im->Bands == 1 || im->Bands == 2) &&
wtiff->miniswhite ) {
invert_band0( wtiff, wtiff->tbuf, p, im->Xsize );
@ -2042,7 +2121,7 @@ vips__tiff_write( VipsImage *input, const char *filename,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
int bitdepth,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,
@ -2064,7 +2143,7 @@ vips__tiff_write( VipsImage *input, const char *filename,
if( !(wtiff = wtiff_new( input, filename,
compression, Q, predictor, profile,
tile, tile_width, tile_height, pyramid, squash,
tile, tile_width, tile_height, pyramid, bitdepth,
miniswhite, resunit, xres, yres, bigtiff, rgbjpeg,
properties, strip, region_shrink, level, lossless, depth,
subifd )) )
@ -2088,7 +2167,7 @@ vips__tiff_write_buf( VipsImage *input,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
int bitdepth,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,
@ -2106,7 +2185,7 @@ vips__tiff_write_buf( VipsImage *input,
if( !(wtiff = wtiff_new( input, NULL,
compression, Q, predictor, profile,
tile, tile_width, tile_height, pyramid, squash,
tile, tile_width, tile_height, pyramid, bitdepth,
miniswhite, resunit, xres, yres, bigtiff, rgbjpeg,
properties, strip, region_shrink, level, lossless, depth,
subifd )) )