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libvips/libvips/foreign/tiff2vips.c

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/* TIFF parts: Copyright (c) 1988, 1990 by Sam Leffler.
* All rights reserved.
*
* This file is provided for unrestricted use provided that this
* legend is included on all tape media and as a part of the
* software program in whole or part. Users may copy, modify or
* distribute this file at will.
* -----------------------------
* Modifications for VIPS: Kirk Martinez 1994
* 22/11/94 JC
* - more general
* - memory leaks fixed
* 20/3/95 JC
* - TIFF error handler added
* - read errors detected correctly
*
* Modified to handle LAB in tiff format.
* It convert LAB-tiff format to VIPS_INTERPRETATION_LABQ in vips format.
* Copyright July-1995 Ahmed Abbood.
*
*
* 19/9/95 JC
* - now calls TIFFClose ... stupid
* 25/1/96 JC
* - typo on MINISBLACK ...
* 7/4/97 JC
* - completely redone for TIFF 6
* - now full baseline TIFF 6 reader, and does CIELAB as well
* 11/4/97 JC
* - added partial read for tiled images
* 23/4/97 JC
* - extra subsample parameter
* - im_istiffpyramid() added
* 5/12/97 JC
* - if loading YCbCr, convert to VIPS_CODING_LABQ
* 1/5/98 JC
* - now reads 16-bit greyscale and RGB
* 26/10/98 JC
* - now used "rb" mode on systems that need binary open
* 12/11/98 JC
* - no sub-sampling if sub == 1
* 26/2/99 JC
* - ooops, else missing for subsample stuff above
* 2/10/99 JC
* - tiled 16-bit greyscale read was broken
* - added mutex for TIFFReadTile() calls
* 11/5/00 JC
* - removed TIFFmalloc/TIFFfree usage
* 23/4/01 JC
* - HAVE_TIFF turns on TIFF goodness
* 24/5/01 JC
* - im_tiff2vips_header() added
* 11/7/01 JC
* - subsample now in input filename
* - ... and it's a page number (from 0) instead
* 21/8/02 JC
* - now reads CMYK
* - hmm, dpi -> ppm conversion was wrong!
* 10/9/02 JC
* - oops, handle TIFF errors better
* 2/12/02 JC
* - reads 8-bit RGBA
* 12/12/02 JC
* - reads 16-bit LAB
* 13/2/03 JC
* - pixels/cm res read was wrong
* 17/11/03 Andrey Kiselev
* - read 32-bit float greyscale and rgb
* 5/4/04
* - better handling of edge tiles (thanks Ruven)
* 16/4/04
* - cleanup
* - added broken tile read mode
* 18/5/04 Andrey Kiselev
* - better no resolution diagnostic
* 26/5/04
* - reads 16 bit RGBA
* 28/7/04
* - arrg, 16bit RGB was broken, thanks haida
* 26/11/04
* - add a TIFF warning handler, stops occasional libMagick exceptions
* 9/3/05
* - load 32-bit float LAB
* 8/4/05
* - onebit read no longer reads one byte too many on multiple of 8 wide
* images
* 22/6/05
* - 16 bit LAB read was broken
* 9/9/05
* - read any ICCPROFILE tag
* 8/5/06
* - set RGB16 and GREY16 Type
* 21/5/06
* - use external im_tile_cache() operation for great code shrinkage
* - less RAM usage too, esp. with >1 CPU
* - should be slightly faster
* - removed 'broken' read option
* 18/7/07 Andrey Kiselev
* - remove "b" option on TIFFOpen()
* 9/4/08
* - set VIPS_META_RESOLUTION_UNIT
* 17/4/08
* - allow CMYKA (thanks Doron)
* 17/7/08
* - convert YCbCr to RGB on read (thanks Ole)
* 15/8/08
* - reorganise for image format system
* 20/12/08
* - dont read with mmap: no performance advantage with libtiff, chews up
* VM wastefully
* 13/1/09
* - read strip-wise, not scanline-wise ... works with more compression /
* subsampling schemes (esp. subsampled YCbCr), and it's a bit quicker
* 4/2/10
* - gtkdoc
* 12/12/10
* - oops, we can just memcpy() now heh
* - avoid unpacking via buffers if we can: either read a tile directly
* into the output region, or writeline directly from the tiff buffer
* 4/4/11
* - argh int/uint mixup for rows_per_strip, thanks Bubba
* 21/4/11
* - palette read can do 1,2,4,8 bits per sample
* - palette read can do mono images
* 5/12/11
* - make into a simple function call ready to be wrapped as a new-style
* VipsForeign class
* 18/2/12
* - switch to sequential read
* - remove the lock ... tilecache does this for us
* 3/6/12
* - always offer THINSTRIP ... later stages can ask for something more
* relaxed if they wish
* 7/6/12
* - clip rows_per_strip down to image height to avoid overflows for huge
* values (thanks Nicolas)
* - better error msg for not PLANARCONFIG_CONTIG images
* 16/9/13
* - support alpha for 8, 16 and 32-bit greyscale images, thanks Robert
* 17/9/13
* - support separate planes for strip read
* - big cleanup
* - support for many more formats, eg. 32-bit int etc.
* 11/4/14
* - support 16 bits per sample palette images
* - palette images can have an alpha
* 22/4/14
* - add read from buffer
* 30/4/14
* - 1/2/4 bit palette images can have alpha
* 27/10/14 Lovell
* - better istiff detector spots bigtiff
* 3/12/14
* - read any XMP metadata
* 19/1/15
* - try to handle 8-bit colormaps
* 26/2/15
* - close the read down early for a header read ... this saves an
* fd during file read, handy for large numbers of input images
* 29/9/15
* - load IPCT metadata
* - load photoshop metadata
* 21/12/15
* - load TIFFTAG_IMAGEDESCRIPTION
* 11/4/16
* - non-int RGB images are tagged as scRGB ... matches photoshop
* convention
* 26/5/16
* - add autorotate support
* 17/11/16
* - add multi-page read
* 17/1/17
* - invalidate operation on read error
* 27/1/17
* - if rows_per_strip is large, read with scanline API instead
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#ifdef HAVE_TIFF
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include <vips/thread.h>
#include "pforeign.h"
#include "tiff.h"
/* What we read from the tiff dir to set our read strategy. For multipage
* read, we need to read and compare lots of these, so it needs to be broken
* out as a separate thing.
*/
typedef struct _RtiffHeader {
uint32 width;
uint32 height;
int samples_per_pixel;
int bits_per_sample;
int photometric_interpretation;
int sample_format;
gboolean separate;
int orientation;
/* Result of TIFFIsTiled().
*/
gboolean tiled;
/* Fields for tiled images.
*/
uint32 tile_width;
uint32 tile_height;
/* Fields for strip images.
*
* If read_scanlinewise is TRUE, the strips are too large to read in a
* single lump and we need to use the scanline API.
*/
uint32 rows_per_strip;
tsize_t strip_size;
int number_of_strips;
gboolean read_scanlinewise;
} RtiffHeader;
/* Scanline-type process function.
*/
struct _Rtiff;
typedef void (*scanline_process_fn)( struct _Rtiff *,
VipsPel *q, VipsPel *p, int n, void *client );
/* Stuff we track during a read.
*/
typedef struct _Rtiff {
/* Parameters.
*/
char *filename;
VipsImage *out;
int page;
int n;
gboolean autorotate;
/* The TIFF we read.
*/
TIFF *tiff;
/* The current page we have set.
*/
int current_page;
/* Process for this image type.
*/
scanline_process_fn sfn;
void *client;
/* Set this is the processfn is just doing a memcpy.
*/
gboolean memcpy;
/* Geometry as read from the TIFF header. This is read for the first
* page, and equal for all other pages.
*/
RtiffHeader header;
/* Hold a single strip or tile, possibly just an image plane.
*/
tdata_t plane_buf;
/* Hold a plane-assembled strip or tile ... a set of samples_per_pixel
* strips or tiles interleaved.
*/
tdata_t contig_buf;
} Rtiff;
/* Test for field exists.
*/
static int
tfexists( TIFF *tif, ttag_t tag )
{
uint32 a, b;
if( TIFFGetField( tif, tag, &a, &b ) )
return( 1 );
else
return( 0 );
}
/* Get a uint32 field.
*/
static int
tfget32( TIFF *tif, ttag_t tag, uint32 *out )
{
uint32 fld;
if( !TIFFGetFieldDefaulted( tif, tag, &fld ) ) {
vips_error( "tiff2vips",
_( "required field %d missing" ), tag );
return( 0 );
}
*out = fld;
return( 1 );
}
/* Get a uint16 field.
*/
static int
tfget16( TIFF *tif, ttag_t tag, int *out )
{
uint16 fld;
if( !TIFFGetFieldDefaulted( tif, tag, &fld ) ) {
vips_error( "tiff2vips",
_( "required field %d missing" ), tag );
return( 0 );
}
*out = fld;
return( 1 );
}
static int
get_resolution( TIFF *tiff, VipsImage *out )
{
float x, y;
int ru;
if( TIFFGetFieldDefaulted( tiff, TIFFTAG_XRESOLUTION, &x ) &&
TIFFGetFieldDefaulted( tiff, TIFFTAG_YRESOLUTION, &y ) &&
tfget16( tiff, TIFFTAG_RESOLUTIONUNIT, &ru ) ) {
switch( ru ) {
case RESUNIT_NONE:
break;
case RESUNIT_INCH:
/* In pixels-per-inch ... convert to mm.
*/
x /= 10.0 * 2.54;
y /= 10.0 * 2.54;
vips_image_set_string( out,
VIPS_META_RESOLUTION_UNIT, "in" );
break;
case RESUNIT_CENTIMETER:
/* In pixels-per-centimetre ... convert to mm.
*/
x /= 10.0;
y /= 10.0;
vips_image_set_string( out,
VIPS_META_RESOLUTION_UNIT, "cm" );
break;
default:
vips_error( "tiff2vips",
"%s", _( "unknown resolution unit" ) );
return( -1 );
}
}
else {
g_warning( _( "no resolution information for "
"TIFF image \"%s\" -- defaulting to 1 pixel per mm" ),
TIFFFileName( tiff ) );
x = 1.0;
y = 1.0;
}
out->Xres = x;
out->Yres = y;
return( 0 );
}
static int
get_sample_format( TIFF *tiff )
{
int sample_format;
uint16 v;
sample_format = SAMPLEFORMAT_INT;
if( TIFFGetFieldDefaulted( tiff, TIFFTAG_SAMPLEFORMAT, &v ) ) {
/* Some images have this set to void, bizarre.
*/
if( v == SAMPLEFORMAT_VOID )
v = SAMPLEFORMAT_UINT;
sample_format = v;
}
return( sample_format );
}
static int
get_orientation( TIFF *tiff )
{
int orientation;
uint16 v;
orientation = ORIENTATION_TOPLEFT;
if( TIFFGetFieldDefaulted( tiff, TIFFTAG_ORIENTATION, &v ) )
/* Can have mad values.
*/
orientation = VIPS_CLIP( 1, v, 8 );
return( orientation );
}
static int
rtiff_strip_read( Rtiff *rtiff, int strip, tdata_t buf )
{
tsize_t length;
#ifdef DEBUG
printf( "rtiff_strip_read: reading strip %d\n", strip );
#endif /*DEBUG*/
if( rtiff->header.read_scanlinewise )
length = TIFFReadScanline( rtiff->tiff,
buf, strip, (tsize_t) -1 );
else
length = TIFFReadEncodedStrip( rtiff->tiff,
strip, buf, (tsize_t) -1 );
if( length == -1 ) {
vips_foreign_load_invalidate( rtiff->out );
vips_error( "tiff2vips", "%s", _( "read error" ) );
return( -1 );
}
return( 0 );
}
static int
rtiff_set_page( Rtiff *rtiff, int page )
{
if( rtiff->current_page != page ) {
#ifdef DEBUG
printf( "rtiff_set_page: selecting page %d\n", page );
#endif /*DEBUG*/
if( !TIFFSetDirectory( rtiff->tiff, page ) ) {
vips_error( "tiff2vips",
_( "TIFF does not contain page %d" ), page );
return( -1 );
}
rtiff->current_page = page;
}
return( 0 );
}
static int
rtiff_n_pages( Rtiff *rtiff )
{
int n;
(void) TIFFSetDirectory( rtiff->tiff, 0 );
for( n = 1; TIFFReadDirectory( rtiff->tiff ); n++ )
;
(void) TIFFSetDirectory( rtiff->tiff, rtiff->current_page );
#ifdef DEBUG
printf( "rtiff_n_pages: found %d pages\n", n );
#endif /*DEBUG*/
return( n );
}
static int
rtiff_check_samples( Rtiff *rtiff, int samples_per_pixel )
{
if( rtiff->header.samples_per_pixel != samples_per_pixel ) {
vips_error( "tiff2vips",
_( "not %d bands" ), samples_per_pixel );
return( -1 );
}
return( 0 );
}
/* Check n and n+1 so we can have an alpha.
*/
static int
rtiff_check_min_samples( Rtiff *rtiff, int samples_per_pixel )
{
if( rtiff->header.samples_per_pixel < samples_per_pixel ) {
vips_error( "tiff2vips",
_( "not at least %d samples per pixel" ),
samples_per_pixel );
return( -1 );
}
return( 0 );
}
static int
rtiff_check_interpretation( Rtiff *rtiff, int photometric_interpretation )
{
if( rtiff->header.photometric_interpretation !=
photometric_interpretation ) {
vips_error( "tiff2vips",
_( "not photometric interpretation %d" ),
photometric_interpretation );
return( -1 );
}
return( 0 );
}
static int
rtiff_check_bits( Rtiff *rtiff, int bits_per_sample )
{
if( rtiff->header.bits_per_sample != bits_per_sample ) {
vips_error( "tiff2vips",
_( "not %d bits per sample" ), bits_per_sample );
return( -1 );
}
return( 0 );
}
static int
rtiff_check_bits_palette( Rtiff *rtiff )
{
if( rtiff->header.bits_per_sample != 16 &&
rtiff->header.bits_per_sample != 8 &&
rtiff->header.bits_per_sample != 4 &&
rtiff->header.bits_per_sample != 2 &&
rtiff->header.bits_per_sample != 1 ) {
vips_error( "tiff2vips",
_( "%d bits per sample palette image not supported" ),
rtiff->header.bits_per_sample );
return( -1 );
}
return( 0 );
}
static VipsBandFormat
rtiff_guess_format( Rtiff *rtiff )
{
int bits_per_sample = rtiff->header.bits_per_sample;
int sample_format = rtiff->header.sample_format;
switch( bits_per_sample ) {
case 1:
case 2:
case 4:
case 8:
if( sample_format == SAMPLEFORMAT_INT )
return( VIPS_FORMAT_CHAR );
if( sample_format == SAMPLEFORMAT_UINT )
return( VIPS_FORMAT_UCHAR );
break;
case 16:
if( sample_format == SAMPLEFORMAT_INT )
return( VIPS_FORMAT_SHORT );
if( sample_format == SAMPLEFORMAT_UINT )
return( VIPS_FORMAT_USHORT );
break;
case 32:
if( sample_format == SAMPLEFORMAT_INT )
return( VIPS_FORMAT_INT );
if( sample_format == SAMPLEFORMAT_UINT )
return( VIPS_FORMAT_UINT );
if( sample_format == SAMPLEFORMAT_IEEEFP )
return( VIPS_FORMAT_FLOAT );
break;
case 64:
if( sample_format == SAMPLEFORMAT_IEEEFP )
return( VIPS_FORMAT_DOUBLE );
if( sample_format == SAMPLEFORMAT_COMPLEXIEEEFP )
return( VIPS_FORMAT_COMPLEX );
break;
case 128:
if( sample_format == SAMPLEFORMAT_COMPLEXIEEEFP )
return( VIPS_FORMAT_DPCOMPLEX );
break;
default:
break;
}
vips_error( "tiff2vips", "%s", _( "unsupported tiff image type\n" ) );
return( VIPS_FORMAT_NOTSET );
}
/* Per-scanline process function for VIPS_CODING_LABQ.
*/
static void
rtiff_labpack_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *dummy )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int x;
for( x = 0; x < n; x++ ) {
q[0] = p[0];
q[1] = p[1];
q[2] = p[2];
q[3] = 0;
q += 4;
p += samples_per_pixel;
}
}
/* Read an 8-bit LAB image.
*/
static int
rtiff_parse_labpack( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_min_samples( rtiff, 3 ) ||
rtiff_check_bits( rtiff, 8 ) ||
rtiff_check_interpretation( rtiff, PHOTOMETRIC_CIELAB ) )
return( -1 );
out->Bands = 4;
out->BandFmt = VIPS_FORMAT_UCHAR;
out->Coding = VIPS_CODING_LABQ;
out->Type = VIPS_INTERPRETATION_LAB;
rtiff->sfn = rtiff_labpack_line;
return( 0 );
}
/* Per-scanline process function for LABS.
*/
static void
rtiff_labs_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *dummy )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
unsigned short *p1;
short *q1;
int x;
int i;
p1 = (unsigned short *) p;
q1 = (short *) q;
for( x = 0; x < n; x++ ) {
/* We use a signed int16 for L.
*/
q1[0] = p1[0] >> 1;
for( i = 1; i < samples_per_pixel; i++ )
q1[i] = p1[i];
q1 += samples_per_pixel;
p1 += samples_per_pixel;
}
}
/* Read a 16-bit LAB image.
*/
static int
rtiff_parse_labs( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_min_samples( rtiff, 3 ) ||
rtiff_check_bits( rtiff, 16 ) ||
rtiff_check_interpretation( rtiff, PHOTOMETRIC_CIELAB ) )
return( -1 );
out->Bands = rtiff->header.samples_per_pixel;
out->BandFmt = VIPS_FORMAT_SHORT;
out->Coding = VIPS_CODING_NONE;
out->Type = VIPS_INTERPRETATION_LABS;
rtiff->sfn = rtiff_labs_line;
return( 0 );
}
/* Per-scanline process function for 1 bit images.
*/
static void
rtiff_onebit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
{
int photometric_interpretation =
rtiff->header.photometric_interpretation;
int x, i, z;
VipsPel bits;
int black = photometric_interpretation == PHOTOMETRIC_MINISBLACK ?
0 : 255;
int white = black ^ 0xff;
/* (sigh) how many times have I written this?
*/
x = 0;
for( i = 0; i < (n >> 3); i++ ) {
bits = (VipsPel) p[i];
for( z = 0; z < 8; z++ ) {
q[x] = (bits & 128) ? white : black;
bits <<= 1;
x += 1;
}
}
/* Do last byte in line.
*/
if( n & 7 ) {
bits = p[i];
for( z = 0; z < (n & 7); z++ ) {
q[x + z] = (bits & 128) ? white : black;
bits <<= 1;
}
}
}
/* Read a 1-bit TIFF image.
*/
static int
rtiff_parse_onebit( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_samples( rtiff, 1 ) ||
rtiff_check_bits( rtiff, 1 ) )
return( -1 );
out->Bands = 1;
out->BandFmt = VIPS_FORMAT_UCHAR;
out->Coding = VIPS_CODING_NONE;
out->Type = VIPS_INTERPRETATION_B_W;
rtiff->sfn = rtiff_onebit_line;
return( 0 );
}
/* Swap the sense of the first channel, if necessary.
*/
#define GREY_LOOP( TYPE, MAX ) { \
TYPE *p1; \
TYPE *q1; \
\
p1 = (TYPE *) p; \
q1 = (TYPE *) q; \
for( x = 0; x < n; x++ ) { \
if( invert ) \
q1[0] = MAX - p1[0]; \
else \
q1[0] = p1[0]; \
\
for( i = 1; i < samples_per_pixel; i++ ) \
q1[i] = p1[i]; \
\
q1 += samples_per_pixel; \
p1 += samples_per_pixel; \
} \
}
/* Per-scanline process function for greyscale images.
*/
static void
rtiff_greyscale_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *client )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int photometric_interpretation =
rtiff->header.photometric_interpretation;
gboolean invert = photometric_interpretation == PHOTOMETRIC_MINISWHITE;
VipsBandFormat format = rtiff_guess_format( rtiff );
int x, i;
switch( format ) {
case VIPS_FORMAT_UCHAR:
case VIPS_FORMAT_CHAR:
GREY_LOOP( guchar, UCHAR_MAX );
break;
case VIPS_FORMAT_SHORT:
GREY_LOOP( gshort, SHRT_MAX );
break;
case VIPS_FORMAT_USHORT:
GREY_LOOP( gushort, USHRT_MAX );
break;
case VIPS_FORMAT_INT:
GREY_LOOP( gint, INT_MAX );
break;
case VIPS_FORMAT_UINT:
GREY_LOOP( guint, UINT_MAX );
break;
case VIPS_FORMAT_FLOAT:
GREY_LOOP( float, 1.0 );
break;
case VIPS_FORMAT_DOUBLE:
GREY_LOOP( double, 1.0 );
break;
default:
g_assert_not_reached();
}
}
/* Read a grey-scale TIFF image. We have to invert the first band if
* PHOTOMETRIC_MINISBLACK is set.
*/
static int
rtiff_parse_greyscale( Rtiff *rtiff, VipsImage *out )
{
if( rtiff_check_min_samples( rtiff, 1 ) )
return( -1 );
out->Bands = rtiff->header.samples_per_pixel;
out->BandFmt = rtiff_guess_format( rtiff );
if( out->BandFmt == VIPS_FORMAT_NOTSET )
return( -1 );
out->Coding = VIPS_CODING_NONE;
if( rtiff->header.bits_per_sample == 16 )
out->Type = VIPS_INTERPRETATION_GREY16;
else
out->Type = VIPS_INTERPRETATION_B_W;
/* rtiff_greyscale_line() doesn't do complex.
*/
if( vips_check_noncomplex( "tiff2vips", out ) )
return( -1 );
rtiff->sfn = rtiff_greyscale_line;
return( 0 );
}
typedef struct {
/* LUTs mapping image indexes to RGB.
*/
VipsPel *red8;
VipsPel *green8;
VipsPel *blue8;
guint16 *red16;
guint16 *green16;
guint16 *blue16;
/* All maps equal, so we write mono.
*/
gboolean mono;
} PaletteRead;
/* 1/2/4 bit samples with an 8-bit palette.
*/
static void
rtiff_palette_line_bit( Rtiff *rtiff,
VipsPel *q, VipsPel *p, int n, void *client )
{
PaletteRead *read = (PaletteRead *) client;
int samples_per_pixel = rtiff->header.samples_per_pixel;
int bits_per_sample = rtiff->header.bits_per_sample;
int bit;
VipsPel data;
int x;
bit = 0;
data = 0;
for( x = 0; x < n * samples_per_pixel; x++ ) {
int i;
if( bit <= 0 ) {
data = *p++;
bit = 8;
}
i = data >> (8 - bits_per_sample);
data <<= bits_per_sample;
bit -= bits_per_sample;
/* The first band goes through the LUT, subsequent bands are
* left-justified and copied.
*/
if( x % samples_per_pixel == 0 ) {
if( read->mono )
*q++ = read->red8[i];
else {
q[0] = read->red8[i];
q[1] = read->green8[i];
q[2] = read->blue8[i];
q += 3;
}
}
else
*q++ = i << (8 - bits_per_sample);
}
}
/* 8-bit samples with an 8-bit palette.
*/
static void
rtiff_palette_line8( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n,
void *client )
{
PaletteRead *read = (PaletteRead *) client;
int samples_per_pixel = rtiff->header.samples_per_pixel;
int x;
int s;
for( x = 0; x < n; x++ ) {
int i = p[0];
if( read->mono )
q[0] = read->red8[i];
else {
q[0] = read->red8[i];
q[1] = read->green8[i];
q[2] = read->blue8[i];
q += 2;
}
for( s = 1; s < samples_per_pixel; s++ )
q[s] = p[s];
q += samples_per_pixel;
p += samples_per_pixel;
}
}
/* 16-bit samples with 16-bit data in the palette.
*/
static void
rtiff_palette_line16( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n,
void *client )
{
PaletteRead *read = (PaletteRead *) client;
int samples_per_pixel = rtiff->header.samples_per_pixel;
guint16 *p16, *q16;
int x;
int s;
q16 = (guint16 *) q;
p16 = (guint16 *) p;
for( x = 0; x < n; x++ ) {
int i = p16[0];
if( read->mono )
q16[0] = read->red16[i];
else {
q16[0] = read->red16[i];
q16[1] = read->green16[i];
q16[2] = read->blue16[i];
q16 += 2;
}
for( s = 1; s < samples_per_pixel; s++ )
q16[s] = p16[s];
q16 += samples_per_pixel;
p16 += samples_per_pixel;
}
}
/* Read a palette-ised TIFF image.
*/
static int
rtiff_parse_palette( Rtiff *rtiff, VipsImage *out )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int bits_per_sample = rtiff->header.bits_per_sample;
int len;
PaletteRead *read;
int i;
if( rtiff_check_bits_palette( rtiff ) ||
rtiff_check_min_samples( rtiff, 1 ) )
return( -1 );
len = 1 << bits_per_sample;
if( !(read = VIPS_NEW( out, PaletteRead )) ||
!(read->red8 = VIPS_ARRAY( out, len, VipsPel )) ||
!(read->green8 = VIPS_ARRAY( out, len, VipsPel )) ||
!(read->blue8 = VIPS_ARRAY( out, len, VipsPel )) )
return( -1 );
/* Get maps, convert to 8-bit data.
*/
if( !TIFFGetField( rtiff->tiff,
TIFFTAG_COLORMAP,
&read->red16, &read->green16, &read->blue16 ) ) {
vips_error( "tiff2vips", "%s", _( "bad colormap" ) );
return( -1 );
}
/* Old-style colourmaps were 8-bit. If all the top bytes are zero,
* assume we have one of these.
*
* See: https://github.com/jcupitt/libvips/issues/220
*/
for( i = 0; i < len; i++ )
if( (read->red16[i] >> 8) |
(read->green16[i] >> 8) |
(read->blue16[i] >> 8) )
break;
if( i < len )
for( i = 0; i < len; i++ ) {
read->red8[i] = read->red16[i] >> 8;
read->green8[i] = read->green16[i] >> 8;
read->blue8[i] = read->blue16[i] >> 8;
}
else {
g_warning( "%s", _( "assuming 8-bit palette" ) );
for( i = 0; i < len; i++ ) {
read->red8[i] = read->red16[i] & 0xff;
read->green8[i] = read->green16[i] & 0xff;
read->blue8[i] = read->blue16[i] & 0xff;
}
}
/* Are all the maps equal? We have a mono image.
*/
read->mono = TRUE;
for( i = 0; i < len; i++ )
if( read->red16[i] != read->green16[i] ||
read->green16[i] != read->blue16[i] ) {
read->mono = FALSE;
break;
}
/* There's a TIFF extension, INDEXED, that is the preferred way to
* encode mono palette images, but few applications support it. So we
* just search the colormap.
*/
if( bits_per_sample <= 8 )
out->BandFmt = VIPS_FORMAT_UCHAR;
else
out->BandFmt = VIPS_FORMAT_USHORT;
out->Coding = VIPS_CODING_NONE;
if( read->mono ) {
out->Bands = samples_per_pixel;
if( bits_per_sample <= 8 )
out->Type = VIPS_INTERPRETATION_B_W;
else
out->Type = VIPS_INTERPRETATION_GREY16;
}
else {
out->Bands = samples_per_pixel + 2;
if( bits_per_sample <= 8 )
out->Type = VIPS_INTERPRETATION_sRGB;
else
out->Type = VIPS_INTERPRETATION_RGB16;
}
rtiff->client = read;
if( bits_per_sample < 8 )
rtiff->sfn = rtiff_palette_line_bit;
else if( bits_per_sample == 8 )
rtiff->sfn = rtiff_palette_line8;
else if( bits_per_sample == 16 )
rtiff->sfn = rtiff_palette_line16;
else
g_assert_not_reached();
return( 0 );
}
/* Per-scanline process function when we just need to copy.
*/
static void
rtiff_memcpy_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *client )
{
VipsImage *im = (VipsImage *) client;
size_t len = n * VIPS_IMAGE_SIZEOF_PEL( im );
memcpy( q, p, len );
}
/* Read a regular multiband image where we can just copy pixels from the tiff
* buffer.
*/
static int
rtiff_parse_copy( Rtiff *rtiff, VipsImage *out )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int photometric_interpretation =
rtiff->header.photometric_interpretation;
out->Bands = samples_per_pixel;
out->BandFmt = rtiff_guess_format( rtiff );
if( out->BandFmt == VIPS_FORMAT_NOTSET )
return( -1 );
out->Coding = VIPS_CODING_NONE;
if( samples_per_pixel >= 3 &&
(photometric_interpretation == PHOTOMETRIC_RGB ||
photometric_interpretation == PHOTOMETRIC_YCBCR) ) {
if( out->BandFmt == VIPS_FORMAT_USHORT )
out->Type = VIPS_INTERPRETATION_RGB16;
else if( !vips_band_format_isint( out->BandFmt ) )
/* Most float images use 0 - 1 for black - white.
* Photoshop uses 0 - 1 and no gamma.
*/
out->Type = VIPS_INTERPRETATION_scRGB;
else
out->Type = VIPS_INTERPRETATION_sRGB;
}
if( samples_per_pixel >= 3 &&
photometric_interpretation == PHOTOMETRIC_CIELAB )
out->Type = VIPS_INTERPRETATION_LAB;
if( samples_per_pixel >= 4 &&
photometric_interpretation == PHOTOMETRIC_SEPARATED )
out->Type = VIPS_INTERPRETATION_CMYK;
rtiff->sfn = rtiff_memcpy_line;
rtiff->client = out;
rtiff->memcpy = TRUE;
return( 0 );
}
typedef int (*reader_fn)( Rtiff *rtiff, VipsImage *out );
/* We have a range of output paths. Look at the tiff header and try to
* route the input image to the best output path.
*/
static reader_fn
rtiff_pick_reader( Rtiff *rtiff )
{
int bits_per_sample = rtiff->header.bits_per_sample;
int photometric_interpretation =
rtiff->header.photometric_interpretation;
if( photometric_interpretation == PHOTOMETRIC_CIELAB ) {
if( bits_per_sample == 8 )
return( rtiff_parse_labpack );
if( bits_per_sample == 16 )
return( rtiff_parse_labs );
}
if( photometric_interpretation == PHOTOMETRIC_MINISWHITE ||
photometric_interpretation == PHOTOMETRIC_MINISBLACK ) {
if( bits_per_sample == 1 )
return( rtiff_parse_onebit );
else
return( rtiff_parse_greyscale );
}
if( photometric_interpretation == PHOTOMETRIC_PALETTE )
return( rtiff_parse_palette );
if( photometric_interpretation == PHOTOMETRIC_YCBCR ) {
/* Sometimes JPEG in TIFF images are tagged as YCBCR. Ask
* libtiff to convert to RGB for us.
*/
TIFFSetField( rtiff->tiff,
TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB );
}
return( rtiff_parse_copy );
}
/* Set the header on @out from our rtiff. rtiff_header_read() has already been
* called.
*/
static int
rtiff_set_header( Rtiff *rtiff, VipsImage *out )
{
uint32 data_length;
void *data;
out->Xsize = rtiff->header.width;
out->Ysize = rtiff->header.height * rtiff->n;
if( rtiff->n > 1 )
vips_image_set_int( out,
VIPS_META_PAGE_HEIGHT, rtiff->header.height );
/* Even though we could end up serving tiled data, always hint
* THINSTRIP, since we're quite happy doing that too, and it could need
* a lot less memory.
*/
vips_image_pipelinev( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
#ifdef DEBUG
printf( "rtiff_set_header: header.samples_per_pixel = %d\n",
rtiff->header.samples_per_pixel );
printf( "rtiff_set_header: header.bits_per_sample = %d\n",
rtiff->header.bits_per_sample );
printf( "rtiff_set_header: header.sample_format = %d\n",
rtiff->header.sample_format );
printf( "rtiff_set_header: header.orientation = %d\n",
rtiff->header.orientation );
#endif /*DEBUG*/
/* We have a range of output paths. Look at the tiff header and try to
* route the input image to the best output path.
*/
if( rtiff_pick_reader( rtiff )( rtiff, out ) )
return( -1 );
/* Read any ICC profile.
*/
if( TIFFGetField( rtiff->tiff,
TIFFTAG_ICCPROFILE, &data_length, &data ) &&
data &&
data_length ) {
void *data_copy;
if( !(data_copy = vips_malloc( NULL, data_length )) )
return( -1 );
memcpy( data_copy, data, data_length );
vips_image_set_blob( out, VIPS_META_ICC_NAME,
(VipsCallbackFn) vips_free, data_copy, data_length );
}
/* Read any XMP metadata.
*/
if( TIFFGetField( rtiff->tiff,
TIFFTAG_XMLPACKET, &data_length, &data ) &&
data &&
data_length ) {
void *data_copy;
if( !(data_copy = vips_malloc( NULL, data_length )) )
return( -1 );
memcpy( data_copy, data, data_length );
vips_image_set_blob( out, VIPS_META_XMP_NAME,
(VipsCallbackFn) vips_free, data_copy, data_length );
}
/* Read any IPCT metadata.
*/
if( TIFFGetField( rtiff->tiff,
TIFFTAG_RICHTIFFIPTC, &data_length, &data ) &&
data &&
data_length ) {
void *data_copy;
/* For no very good reason, libtiff stores IPCT as an array of
* long, not byte.
*/
data_length *= 4;
if( !(data_copy = vips_malloc( NULL, data_length )) )
return( -1 );
memcpy( data_copy, data, data_length );
vips_image_set_blob( out, VIPS_META_IPCT_NAME,
(VipsCallbackFn) vips_free, data_copy, data_length );
}
/* Read any photoshop metadata.
*/
if( TIFFGetField( rtiff->tiff,
TIFFTAG_PHOTOSHOP, &data_length, &data ) &&
data &&
data_length ) {
void *data_copy;
if( !(data_copy = vips_malloc( NULL, data_length )) )
return( -1 );
memcpy( data_copy, data, data_length );
vips_image_set_blob( out, VIPS_META_PHOTOSHOP_NAME,
(VipsCallbackFn) vips_free, data_copy, data_length );
}
/* IMAGEDESCRIPTION often has useful metadata.
*/
if( TIFFGetField( rtiff->tiff, TIFFTAG_IMAGEDESCRIPTION, &data ) ) {
/* libtiff makes sure that data is null-terminated and contains
* no embedded null characters.
*/
vips_image_set_string( out,
VIPS_META_IMAGEDESCRIPTION, (char *) data );
}
if( get_resolution( rtiff->tiff, out ) )
return( -1 );
/* Set the "orientation" tag. This is picked up later by autorot, if
* requested.
*/
vips_image_set_int( out,
VIPS_META_ORIENTATION, rtiff->header.orientation );
/* Tell downstream if we are reading sequentially.
*/
if( !rtiff->header.tiled )
vips_image_set_area( out, VIPS_META_SEQUENTIAL, NULL, NULL );
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
rtiff_tile_size( Rtiff *rtiff )
{
return( TIFFTileRowSize( rtiff->tiff ) * rtiff->header.tile_height );
}
/* Allocate a tile buffer. Have one of these for each thread so we can unpack
* to vips in parallel.
*/
static void *
rtiff_seq_start( VipsImage *out, void *a, void *b )
{
Rtiff *rtiff = (Rtiff *) a;
tsize_t size;
tdata_t *buf;
size = rtiff_tile_size( rtiff );
if( !(buf = vips_malloc( NULL, size )) )
return( NULL );
return( (void *) buf );
}
static int
rtiff_read_tile( Rtiff *rtiff, tdata_t *buf, int x, int y )
{
if( TIFFReadTile( rtiff->tiff, buf, x, y, 0, 0 ) < 0 ) {
vips_foreign_load_invalidate( rtiff->out );
return( -1 );
}
return( 0 );
}
/* Paint a tile from the file. This is a
* special-case for when a region is exactly a tiff tile, and pixels need no
* conversion. In this case, libtiff can read tiles directly to our output
* region.
*/
static int
rtiff_fill_region_aligned( VipsRegion *out, void *seq, void *a, void *b )
{
Rtiff *rtiff = (Rtiff *) a;
VipsRect *r = &out->valid;
g_assert( (r->left % rtiff->header.tile_width) == 0 );
g_assert( (r->top % rtiff->header.tile_height) == 0 );
g_assert( r->width == rtiff->header.tile_width );
g_assert( r->height == rtiff->header.tile_height );
g_assert( VIPS_REGION_LSKIP( out ) == VIPS_REGION_SIZEOF_LINE( out ) );
#ifdef DEBUG
printf( "rtiff_fill_region_aligned: left = %d, top = %d\n",
r->left, r->top );
#endif /*DEBUG*/
VIPS_GATE_START( "rtiff_fill_region_aligned: work" );
/* Read that tile directly into the vips tile.
*/
if( rtiff_read_tile( rtiff,
(tdata_t *) VIPS_REGION_ADDR( out, r->left, r->top ),
r->left, r->top ) ) {
VIPS_GATE_STOP( "rtiff_fill_region_aligned: work" );
return( -1 );
}
VIPS_GATE_STOP( "rtiff_fill_region_aligned: work" );
return( 0 );
}
/* Loop over the output region painting in tiles from the file.
*/
static int
rtiff_fill_region( VipsRegion *out, void *seq, void *a, void *b, gboolean *stop )
{
tdata_t *buf = (tdata_t *) seq;
Rtiff *rtiff = (Rtiff *) a;
int tile_width = rtiff->header.tile_width;
int tile_height = rtiff->header.tile_height;
VipsRect *r = &out->valid;
/* Sizeof a line of bytes in the TIFF tile.
*/
int tls = rtiff_tile_size( rtiff ) / tile_height;
/* 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
* to calculate addresses within a tile and, because we are wrapped in
* vips_tilecache(), we will never have to calculate positions not
* within a tile.
*/
int tps = tls / tile_width;
int x, y, z;
/* Special case: we are filling a single tile exactly sized to match
* the tiff tile and we have no repacking to do for this format.
*/
if( rtiff->memcpy &&
r->left % tile_width == 0 &&
r->top % tile_height == 0 &&
r->width == tile_width &&
r->height == tile_height &&
VIPS_REGION_LSKIP( out ) == VIPS_REGION_SIZEOF_LINE( out ) )
return( rtiff_fill_region_aligned( out, seq, a, b ) );
VIPS_GATE_START( "rtiff_fill_region: work" );
y = 0;
while( y < r->height ) {
VipsRect tile, page, hit;
x = 0;
while( x < r->width ) {
int page_no = rtiff->page + (r->top + y) /
rtiff->header.height;
int page_y = (r->top + y) % rtiff->header.height;
/* Coordinate of the tile on this page that xy falls in.
*/
int xs = ((r->left + x) / tile_width) * tile_width;
int ys = (page_y / tile_height) * tile_height;
if( rtiff_set_page( rtiff, page_no ) ||
rtiff_read_tile( rtiff, buf, xs, ys ) ) {
VIPS_GATE_STOP( "rtiff_fill_region: work" );
return( -1 );
}
/* Position of tile on the page.
*/
tile.left = xs;
tile.top = ys;
tile.width = tile_width;
tile.height = tile_height;
/* It'll be clipped by this page.
*/
page.left = 0;
page.top = 0;
page.width = rtiff->header.width;
page.height = rtiff->header.height;
vips_rect_intersectrect( &tile, &page, &tile );
/* To image coordinates.
*/
tile.top += page_no * rtiff->header.height;
/* And clip again by this region.
*/
vips_rect_intersectrect( &tile, r, &hit );
/* Unpack to VIPS format.
* Just unpack the section of the tile we need.
*/
for( z = 0; z < hit.height; z++ ) {
VipsPel *p = (VipsPel *) buf +
(hit.left - tile.left) * tps +
(hit.top - tile.top + z) * tls;
VipsPel *q = VIPS_REGION_ADDR( out,
hit.left, hit.top + z );
rtiff->sfn( rtiff,
q, p, hit.width, rtiff->client );
}
x += tile.width;
}
y += tile.height;
}
VIPS_GATE_STOP( "rtiff_fill_region: work" );
return( 0 );
}
static int
rtiff_seq_stop( void *seq, void *a, void *b )
{
vips_free( seq );
return( 0 );
}
/* Auto-rotate handling.
*/
static int
rtiff_autorotate( Rtiff *rtiff, VipsImage *in, VipsImage **out )
{
VipsAngle angle = vips_autorot_get_angle( in );
if( rtiff->autorotate &&
angle != VIPS_ANGLE_D0 ) {
/* Need to copy to memory or disc, we have to stay seq.
*/
const guint64 image_size = VIPS_IMAGE_SIZEOF_IMAGE( in );
const guint64 disc_threshold = vips_get_disc_threshold();
VipsImage *x;
if( image_size > disc_threshold )
x = vips_image_new_temp_file( "%s.v" );
else
x = vips_image_new_memory();
if( vips_image_write( in, x ) ||
vips_rot( x, out, angle, NULL ) ) {
g_object_unref( x );
return( -1 );
}
g_object_unref( x );
/* We must remove the tag to prevent accidental
* double rotations.
*/
vips_autorot_remove_angle( *out );
}
else {
*out = in;
g_object_ref( in );
}
return( 0 );
}
/* Tile-type TIFF reader core - pass in a per-tile transform. Generate into
* the im and do it all partially.
*/
static int
rtiff_read_tilewise( Rtiff *rtiff, VipsImage *out )
{
int tile_width = rtiff->header.tile_width;
int tile_height = rtiff->header.tile_height;
VipsImage **t = (VipsImage **)
vips_object_local_array( VIPS_OBJECT( out ), 3 );
#ifdef DEBUG
printf( "tiff2vips: rtiff_read_tilewise\n" );
#endif /*DEBUG*/
/* I don't have a sample images for tiled + separate, ban it for now.
*/
if( rtiff->header.separate ) {
vips_error( "tiff2vips",
"%s", _( "tiled separate planes not supported" ) );
return( -1 );
}
/* Read to this image, then cache to out, see below.
*/
t[0] = vips_image_new();
if( rtiff_set_header( rtiff, t[0] ) )
return( -1 );
/* Double check: in memcpy mode, the vips tilesize should exactly
* match the tifftile size.
*/
if( rtiff->memcpy ) {
size_t vips_tile_size;
vips_tile_size = VIPS_IMAGE_SIZEOF_PEL( t[0] ) *
tile_width * tile_height;
if( rtiff_tile_size( rtiff ) != vips_tile_size ) {
vips_error( "tiff2vips",
"%s", _( "unsupported tiff image type" ) );
return( -1 );
}
}
/* Even though this is a tiled reader, we hint thinstrip since with
* the cache we are quite happy serving that if anything downstream
* would like it.
*/
vips_image_pipelinev( t[0], VIPS_DEMAND_STYLE_THINSTRIP, NULL );
if( vips_image_generate( t[0],
rtiff_seq_start, rtiff_fill_region, rtiff_seq_stop,
rtiff, NULL ) )
return( -1 );
/* Copy to out, adding a cache. Enough tiles for two complete rows.
*/
if( vips_tilecache( t[0], &t[1],
"tile_width", tile_width,
"tile_height", tile_height,
"max_tiles", 2 * (1 + t[0]->Xsize / tile_width),
NULL ) )
return( -1 );
if( rtiff_autorotate( rtiff, t[1], &t[2] ) )
return( -1 );
if( vips_image_write( t[2], out ) )
return( -1 );
return( 0 );
}
/* Read a strip. If the image is in separate planes, read each plane and
* interleave to the output.
*
* strip is the number of this strip in this page.
*/
static int
rtiff_strip_read_interleaved( Rtiff *rtiff, tstrip_t strip, tdata_t buf )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int rows_per_strip = rtiff->header.rows_per_strip;
int bits_per_sample = rtiff->header.bits_per_sample;
int strip_y = strip * rows_per_strip;
if( rtiff->header.separate ) {
int page_width = rtiff->header.width;
int page_height = rtiff->header.height;
int strips_per_plane = 1 + (page_height - 1) / rows_per_strip;
int strip_height = VIPS_MIN( rows_per_strip,
page_height - strip_y );
int pels_per_strip = page_width * strip_height;
int bytes_per_sample = bits_per_sample >> 3;
int i, j, k;
for( i = 0; i < samples_per_pixel; i++ ) {
VipsPel *p;
VipsPel *q;
if( rtiff_strip_read( rtiff,
strips_per_plane * i + strip,
rtiff->plane_buf ) )
return( -1 );
p = (VipsPel *) rtiff->plane_buf;
q = i * bytes_per_sample + (VipsPel *) buf;
for( j = 0; j < pels_per_strip; j++ ) {
for( k = 0; k < bytes_per_sample; k++ )
q[k] = p[k];
p += bytes_per_sample;
q += bytes_per_sample * samples_per_pixel;
}
}
}
else {
if( rtiff_strip_read( rtiff, strip, buf ) )
return( -1 );
}
return( 0 );
}
static int
rtiff_stripwise_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
Rtiff *rtiff = (Rtiff *) a;
int rows_per_strip = rtiff->header.rows_per_strip;
int page_height = rtiff->header.height;
tsize_t scanline_size = TIFFScanlineSize( rtiff->tiff );
VipsRect *r = &or->valid;
int y;
#ifdef DEBUG
printf( "tiff2vips: read_stripwise_generate: top = %d, height = %d\n",
r->top, r->height );
#endif /*DEBUG*/
/* We're inside a tilecache where tiles are the full image width, so
* this should always be true.
*/
g_assert( r->left == 0 );
g_assert( r->width == or->im->Xsize );
g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
/* If we're reading more than one page, tiles won't fall on strip
* boundaries.
*/
/* Tiles should always be a strip in height, unless it's the final
* strip in the image.
*/
g_assert( r->height ==
VIPS_MIN( rows_per_strip, or->im->Ysize - r->top ) );
VIPS_GATE_START( "rtiff_stripwise_generate: work" );
y = 0;
while( y < r->height ) {
/* Page number, position within this page.
*/
int page_no = rtiff->page + (r->top + y) / page_height;
int y_page = (r->top + y) % page_height;
/* Strip number.
*/
tstrip_t strip_no = y_page / rows_per_strip;
VipsRect image, page, strip, hit;
/* Our four (including the output region) rects, all in
* output image coordinates.
*/
image.left = 0;
image.top = 0;
image.width = rtiff->out->Xsize;
image.height = rtiff->out->Ysize;
page.left = 0;
page.top = page_height * ((r->top + y) / page_height);
page.width = rtiff->out->Xsize;
page.height = page_height;
strip.left = 0;
strip.top = page.top + strip_no * rows_per_strip;
strip.width = rtiff->out->Xsize;
strip.height = rows_per_strip;
/* Clip strip against page and image ... the final strip will
* be smaller.
*/
vips_rect_intersectrect( &strip, &image, &strip );
vips_rect_intersectrect( &strip, &page, &strip );
/* Now the bit that overlaps with the region we are filling.
*/
vips_rect_intersectrect( &strip, r, &hit );
g_assert( hit.height > 0 );
if( rtiff_set_page( rtiff, page_no ) ) {
VIPS_GATE_STOP( "rtiff_stripwise_generate: work" );
return( -1 );
}
/* Read directly into the image if we can. Otherwise, we must
* read to a temp buffer then unpack into the image.
*
* We need to read via a buffer if we need to reformat pixels,
* or if this strip is not aligned on a tile boundary.
*/
if( rtiff->memcpy &&
hit.top == strip.top &&
hit.height == strip.height ) {
if( rtiff_strip_read_interleaved( rtiff, strip_no,
VIPS_REGION_ADDR( or, 0, r->top + y ) ) ) {
VIPS_GATE_STOP(
"rtiff_stripwise_generate: work" );
return( -1 );
}
}
else {
VipsPel *p;
VipsPel *q;
int z;
/* Read and interleave the entire strip.
*/
if( rtiff_strip_read_interleaved( rtiff, strip_no,
rtiff->contig_buf ) ) {
VIPS_GATE_STOP(
"rtiff_stripwise_generate: work" );
return( -1 );
}
/* Do any repacking to generate pixels in vips layout.
*/
p = rtiff->contig_buf +
(hit.top - strip.top) * scanline_size;
q = VIPS_REGION_ADDR( or, 0, r->top + y );
for( z = 0; z < hit.height; z++ ) {
rtiff->sfn( rtiff,
q, p, or->im->Xsize, rtiff->client );
p += scanline_size;
q += VIPS_REGION_LSKIP( or );
}
}
y += hit.height;
}
VIPS_GATE_STOP( "rtiff_stripwise_generate: work" );
return( 0 );
}
/* Stripwise reading.
*
* We could potentially read strips in any order, but this would give
* catastrophic performance for operations like 90 degress rotate on a
* large image. Only offer sequential read.
*/
static int
rtiff_read_stripwise( Rtiff *rtiff, VipsImage *out )
{
VipsImage **t = (VipsImage **)
vips_object_local_array( VIPS_OBJECT( out ), 3 );
#ifdef DEBUG
printf( "tiff2vips: rtiff_read_stripwise\n" );
#endif /*DEBUG*/
t[0] = vips_image_new();
if( rtiff_set_header( rtiff, t[0] ) )
return( -1 );
vips_image_pipelinev( t[0], VIPS_DEMAND_STYLE_THINSTRIP, NULL );
#ifdef DEBUG
printf( "rtiff_read_stripwise: header.rows_per_strip = %u\n",
rtiff->header.rows_per_strip );
printf( "rtiff_read_stripwise: header.strip_size = %zd\n",
rtiff->header.strip_size );
printf( "rtiff_read_stripwise: header.number_of_strips = %d\n",
rtiff->header.number_of_strips );
#endif /*DEBUG*/
/* Double check: in memcpy mode, the vips linesize should exactly
* match the tiff line size.
*/
if( rtiff->memcpy ) {
size_t vips_line_size;
/* Lines are smaller in plane-separated mode.
*/
if( rtiff->header.separate )
vips_line_size = VIPS_IMAGE_SIZEOF_ELEMENT( t[0] ) *
t[0]->Xsize;
else
vips_line_size = VIPS_IMAGE_SIZEOF_LINE( t[0] );
if( vips_line_size != TIFFScanlineSize( rtiff->tiff ) ) {
vips_error( "tiff2vips",
"%s", _( "unsupported tiff image type" ) );
return( -1 );
}
}
/* If we have separate image planes, we must read to a plane buffer,
* then interleave to the output.
*
* We don't need a separate buffer per thread since the _generate()
* function runs inside the cache lock.
*/
if( rtiff->header.separate ) {
if( !(rtiff->plane_buf = vips_malloc( VIPS_OBJECT( out ),
rtiff->header.strip_size )) )
return( -1 );
}
/* If we need to manipulate pixels, we must read to an interleaved
* plane buffer before repacking to the output.
*
* If we are doing a multi-page read, we need a strip buffer, since
* strips may not be aligned on tile boundaries.
*
* We don't need a separate buffer per thread since the _generate()
* function runs inside the cache lock.
*/
if( !rtiff->memcpy ||
rtiff->n > 1 ) {
tsize_t size;
size = rtiff->header.strip_size;
if( rtiff->header.separate )
size *= rtiff->header.samples_per_pixel;
if( !(rtiff->contig_buf =
vips_malloc( VIPS_OBJECT( out ), size )) )
return( -1 );
}
if(
vips_image_generate( t[0],
NULL, rtiff_stripwise_generate, NULL,
rtiff, NULL ) ||
vips_sequential( t[0], &t[1],
"tile_height", rtiff->header.rows_per_strip,
NULL ) ||
rtiff_autorotate( rtiff, t[1], &t[2] ) ||
vips_image_write( t[2], out ) )
return( -1 );
return( 0 );
}
/* Can be called many times.
*/
static void
rtiff_free( Rtiff *rtiff )
{
VIPS_FREEF( TIFFClose, rtiff->tiff );
}
static void
rtiff_close( VipsObject *object, Rtiff *rtiff )
{
rtiff_free( rtiff );
}
static Rtiff *
rtiff_new( VipsImage *out, int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
if( !(rtiff = VIPS_NEW( out, Rtiff )) )
return( NULL );
rtiff->filename = NULL;
rtiff->out = out;
rtiff->page = page;
rtiff->n = n;
rtiff->autorotate = autorotate;
rtiff->tiff = NULL;
rtiff->current_page = -1;
rtiff->sfn = NULL;
rtiff->client = NULL;
rtiff->memcpy = FALSE;
rtiff->plane_buf = NULL;
rtiff->contig_buf = NULL;
g_signal_connect( out, "close",
G_CALLBACK( rtiff_close ), rtiff );
if( rtiff->page < 0 || rtiff->page > 1000000 ) {
vips_error( "tiff2vips", _( "bad page number %d" ),
rtiff->page );
return( NULL );
}
/* We allow n == -1, meaning all pages. It gets swapped for a real n
* value when we open the TIFF.
*/
if( rtiff->n != -1 &&
(rtiff->n < 1 || rtiff->n > 1000000) ) {
vips_error( "tiff2vips", _( "bad number of pages %d" ),
rtiff->n );
return( NULL );
}
return( rtiff );
}
/* Load from a tiff dir into one of our tiff header structs.
*/
static int
rtiff_header_read( Rtiff *rtiff, RtiffHeader *header )
{
if( !tfget32( rtiff->tiff, TIFFTAG_IMAGEWIDTH, &header->width ) ||
!tfget32( rtiff->tiff, TIFFTAG_IMAGELENGTH, &header->height ) ||
!tfget16( rtiff->tiff,
TIFFTAG_SAMPLESPERPIXEL, &header->samples_per_pixel ) ||
!tfget16( rtiff->tiff,
TIFFTAG_BITSPERSAMPLE, &header->bits_per_sample ) ||
!tfget16( rtiff->tiff,
TIFFTAG_PHOTOMETRIC,
&header->photometric_interpretation ) )
return( -1 );
/* Arbitrary sanity-checking limits.
*/
if( header->width <= 0 ||
header->width > VIPS_MAX_COORD ||
header->height <= 0 ||
header->height > VIPS_MAX_COORD ) {
vips_error( "tiff2vips",
"%s", _( "width/height out of range" ) );
return( -1 );
}
if( header->samples_per_pixel <= 0 ||
header->samples_per_pixel > 10000 ||
header->bits_per_sample <= 0 ||
header->bits_per_sample > 32 ) {
vips_error( "tiff2vips",
"%s", _( "samples out of range" ) );
return( -1 );
}
header->sample_format = get_sample_format( rtiff->tiff );
header->orientation = get_orientation( rtiff->tiff );
header->separate = FALSE;
if( tfexists( rtiff->tiff, TIFFTAG_PLANARCONFIG ) ) {
int v;
if( !tfget16( rtiff->tiff, TIFFTAG_PLANARCONFIG, &v ) )
return( -1 );
if( v == PLANARCONFIG_SEPARATE )
header->separate = TRUE;
}
/* Tiles and strip images have slightly different fields.
*/
header->tiled = TIFFIsTiled( rtiff->tiff );
if( header->tiled ) {
if( !tfget32( rtiff->tiff,
TIFFTAG_TILEWIDTH, &header->tile_width ) ||
!tfget32( rtiff->tiff,
TIFFTAG_TILELENGTH, &header->tile_height ) )
return( -1 );
}
else {
if( !tfget32( rtiff->tiff,
TIFFTAG_ROWSPERSTRIP, &header->rows_per_strip ) )
return( -1 );
header->strip_size = TIFFStripSize( rtiff->tiff );
header->number_of_strips = TIFFNumberOfStrips( rtiff->tiff );
header->read_scanlinewise = FALSE;
/* rows_per_strip can be 2 ** 32 - 1, meaning the whole image.
* Clip this down to height to avoid confusing vips.
*
* And it musn't be zero.
*/
header->rows_per_strip =
VIPS_CLIP( 1, header->rows_per_strip, header->height );
/* libtiff has two strip-wise readers. TIFFReadEncodedStrip()
* decompresses an entire strip to memory. It's fast, but it
* will need a lot of ram if the strip is large.
* TIFFReadScanline() reads a single scanline. It's slower, but
* will save a lot of memory if strips are large.
*
* If this image has a strip size of over 128 lines, fall back
* to TIFFReadScanline(), otherwise use TIFFReadEncodedStrip().
*/
if( header->rows_per_strip > 128 ) {
header->rows_per_strip = 1;
header->strip_size = TIFFScanlineSize( rtiff->tiff );
header->number_of_strips = header->height;
header->read_scanlinewise = TRUE;
}
}
return( 0 );
}
static int
rtiff_header_equal( RtiffHeader *h1, RtiffHeader *h2 )
{
if( h1->width != h2->width ||
h1->height != h2->height ||
h1->samples_per_pixel != h2->samples_per_pixel ||
h1->bits_per_sample != h2->bits_per_sample ||
h1->photometric_interpretation !=
h2->photometric_interpretation ||
h1->sample_format != h2->sample_format ||
h1->separate != h2->separate ||
h1->tiled != h2->tiled ||
h1->orientation != h2->orientation )
return( 0 );
if( h1->tiled ) {
if( h1->tile_width != h2->tile_width ||
h1->tile_height != h2->tile_height )
return( 0 );
}
else {
if( h1->rows_per_strip != h2->rows_per_strip ||
h1->strip_size != h2->strip_size ||
h1->number_of_strips != h2->number_of_strips )
return( 0 );
}
return( 1 );
}
static int
rtiff_header_read_all( Rtiff *rtiff )
{
#ifdef DEBUG
printf( "tiff2vips: reading header for page %d ...\n", rtiff->page );
#endif /*DEBUG*/
if( rtiff_set_page( rtiff, rtiff->page ) ||
rtiff_header_read( rtiff, &rtiff->header ) )
return( -1 );
/* -1 means "to the end".
*/
if( rtiff->n == -1 )
rtiff->n = rtiff_n_pages( rtiff ) - rtiff->page;
/* If we're to read many pages, verify that they are all identical.
*/
if( rtiff->n > 1 ) {
int i;
for( i = 1; i < rtiff->n; i++ ) {
RtiffHeader header;
#ifdef DEBUG
printf( "tiff2vips: verifying header for page %d ...\n",
rtiff->page + i );
#endif /*DEBUG*/
if( rtiff_set_page( rtiff, rtiff->page + i ) ||
rtiff_header_read( rtiff, &header ) )
return( -1 );
if( !rtiff_header_equal( &rtiff->header, &header ) ) {
vips_error( "tiff2vips",
_( "page %d differs from page %d" ),
rtiff->page + i, rtiff->page );
return( -1 );
}
}
}
return( 0 );
}
static Rtiff *
rtiff_new_filename( const char *filename, VipsImage *out,
int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
if( !(rtiff = rtiff_new( out, page, n, autorotate )) ||
!(rtiff->tiff = vips__tiff_openin( filename )) ||
rtiff_header_read_all( rtiff ) )
return( NULL );
rtiff->filename = vips_strdup( VIPS_OBJECT( out ), filename );
return( rtiff );
}
static Rtiff *
rtiff_new_buffer( const void *buf, size_t len, VipsImage *out,
int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
if( !(rtiff = rtiff_new( out, page, n, autorotate )) ||
!(rtiff->tiff = vips__tiff_openin_buffer( out, buf, len )) ||
rtiff_header_read_all( rtiff ) )
return( NULL );
return( rtiff );
}
/*
FIXME ... Unused for now, perhaps if we add another format flag.
static int
istiffpyramid( const char *name )
{
TIFF *tif;
vips__tiff_init();
if( (tif = get_directory( name, 2 )) ) {
// We can see page 2 ... assume it is.
TIFFClose( tif );
return( 1 );
}
return( 0 );
}
*/
int
vips__tiff_read( const char *filename, VipsImage *out,
int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
#ifdef DEBUG
printf( "tiff2vips: libtiff version is \"%s\"\n", TIFFGetVersion() );
printf( "tiff2vips: libtiff starting for %s\n", filename );
#endif /*DEBUG*/
vips__tiff_init();
if( !(rtiff = rtiff_new_filename( filename, out, page, n, autorotate )) )
return( -1 );
if( rtiff->header.tiled ) {
if( rtiff_read_tilewise( rtiff, out ) )
return( -1 );
}
else {
if( rtiff_read_stripwise( rtiff, out ) )
return( -1 );
}
return( 0 );
}
/* On a header-only read, we can just swap width/height if orientaion is 6 or
* 8.
*/
static void
vips__tiff_read_header_orientation( Rtiff *rtiff, VipsImage *out )
{
int orientation;
if( rtiff->autorotate &&
vips_image_get_typeof( out, VIPS_META_ORIENTATION ) &&
!vips_image_get_int( out,
VIPS_META_ORIENTATION, &orientation ) ) {
if( orientation == 3 ||
orientation == 6 )
VIPS_SWAP( int, out->Xsize, out->Ysize );
/* We must remove VIPS_META_ORIENTATION to prevent accidental
* double rotations.
*/
vips_image_remove( out, VIPS_META_ORIENTATION );
}
}
int
vips__tiff_read_header( const char *filename, VipsImage *out,
int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
vips__tiff_init();
if( !(rtiff = rtiff_new_filename( filename, out, page, n, autorotate )) )
return( -1 );
if( rtiff_set_header( rtiff, out ) )
return( -1 );
vips__tiff_read_header_orientation( rtiff, out );
/* Just a header read: we can free the tiff read early and save an fd.
*/
rtiff_free( rtiff );
return( 0 );
}
gboolean
vips__istifftiled( const char *filename )
{
TIFF *tif;
gboolean tiled;
vips__tiff_init();
if( !(tif = vips__tiff_openin( filename )) ) {
vips_error_clear();
return( FALSE );
}
tiled = TIFFIsTiled( tif );
TIFFClose( tif );
return( tiled );
}
gboolean
vips__istiff_buffer( const void *buf, size_t len )
{
char *str = (char *) buf;
if( len >= 4 &&
((str[0] == 'M' && str[1] == 'M' &&
str[2] == '\0' && (str[3] == '*' || str[3] == '+')) ||
(str[0] == 'I' && str[1] == 'I' &&
(str[2] == '*' || str[2] == '+') && str[3] == '\0')) )
return( TRUE );
return( FALSE );
}
gboolean
vips__istiff( const char *filename )
{
unsigned char buf[4];
if( vips__get_bytes( filename, buf, 4 ) &&
vips__istiff_buffer( buf, 4 ) )
return( TRUE );
return( FALSE );
}
int
vips__tiff_read_header_buffer( const void *buf, size_t len, VipsImage *out,
int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
vips__tiff_init();
if( !(rtiff = rtiff_new_buffer( buf, len, out, page, n, autorotate )) )
return( -1 );
if( rtiff_set_header( rtiff, out ) )
return( -1 );
vips__tiff_read_header_orientation( rtiff, out );
return( 0 );
}
int
vips__tiff_read_buffer( const void *buf, size_t len,
VipsImage *out, int page, int n, gboolean autorotate )
{
Rtiff *rtiff;
#ifdef DEBUG
printf( "tiff2vips: libtiff version is \"%s\"\n", TIFFGetVersion() );
printf( "tiff2vips: libtiff starting for buffer %p\n", buf );
#endif /*DEBUG*/
vips__tiff_init();
if( !(rtiff = rtiff_new_buffer( buf, len, out, page, n, autorotate )) )
return( -1 );
if( rtiff->header.tiled ) {
if( rtiff_read_tilewise( rtiff, out ) )
return( -1 );
}
else {
if( rtiff_read_stripwise( rtiff, out ) )
return( -1 );
}
return( 0 );
}
gboolean
vips__istifftiled_buffer( const void *buf, size_t len )
{
VipsImage *im;
TIFF *tif;
gboolean tiled;
vips__tiff_init();
im = vips_image_new();
if( !(tif = vips__tiff_openin_buffer( im, buf, len )) ) {
g_object_unref( im );
vips_error_clear();
return( FALSE );
}
tiled = TIFFIsTiled( tif );
TIFFClose( tif );
g_object_unref( im );
return( tiled );
}
#endif /*HAVE_TIFF*/
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