391 lines
7.9 KiB
C
391 lines
7.9 KiB
C
/* Some shared TIFF utilities.
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*
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* 14/10/16
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* - from vips2tiff.c
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*
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* 26/8/17
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* - add openout_read, to help tiffsave_buffer for pyramids
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/*
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#ifdef HAVE_TIFF
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /*HAVE_UNISTD_H*/
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#include <string.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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#include <tiffio.h>
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#include "tiff.h"
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/* Handle TIFF errors here. Shared with vips2tiff.c. These can be called from
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* more than one thread.
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*/
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static void
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vips__thandler_error( const char *module, const char *fmt, va_list ap )
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{
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vips_verror( module, fmt, ap );
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}
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/* It'd be nice to be able to support the @fail option for the tiff loader, but
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* there's no easy way to do this, since libtiff has a global warning handler.
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*/
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static void
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vips__thandler_warning( const char *module, const char *fmt, va_list ap )
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{
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g_logv( G_LOG_DOMAIN, G_LOG_LEVEL_WARNING, fmt, ap );
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}
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/* Called during library init.
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*
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* libtiff error and warning handlers may be called from other threads
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* running in other libs. Other libs may install error handlers and capture
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* messages caused by us.
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*/
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void
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vips__tiff_init( void )
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{
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TIFFSetErrorHandler( vips__thandler_error );
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TIFFSetWarningHandler( vips__thandler_warning );
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}
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/* Open TIFF for output.
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*/
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TIFF *
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vips__tiff_openout( const char *path, gboolean bigtiff )
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{
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TIFF *tif;
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const char *mode = bigtiff ? "w8" : "w";
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#ifdef DEBUG
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printf( "vips__tiff_openout( \"%s\", \"%s\" )\n", path, mode );
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#endif /*DEBUG*/
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/* Need the utf-16 version on Windows.
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*/
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#ifdef G_OS_WIN32
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{
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GError *error = NULL;
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wchar_t *path16;
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if( !(path16 = (wchar_t *)
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g_utf8_to_utf16( path, -1, NULL, NULL, &error )) ) {
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vips_g_error( &error );
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return( NULL );
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}
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tif = TIFFOpenW( path16, mode );
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g_free( path16 );
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}
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#else /*!G_OS_WIN32*/
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tif = TIFFOpen( path, mode );
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#endif /*G_OS_WIN32*/
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if( !tif ) {
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vips_error( "tiff",
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_( "unable to open \"%s\" for output" ), path );
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return( NULL );
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}
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return( tif );
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}
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/* TIFF input from a vips source.
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*/
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static tsize_t
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openin_source_read( thandle_t st, tdata_t data, tsize_t size )
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{
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VipsSource *source = VIPS_SOURCE( st );
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return( vips_source_read( source, data, size ) );
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}
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static tsize_t
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openin_source_write( thandle_t st, tdata_t buffer, tsize_t size )
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{
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g_assert_not_reached();
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return( 0 );
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}
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static toff_t
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openin_source_seek( thandle_t st, toff_t position, int whence )
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{
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VipsSource *source = VIPS_SOURCE( st );
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/* toff_t is usually uint64, with -1 cast to uint64 to indicate error.
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*/
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return( (toff_t) vips_source_seek( source, position, whence ) );
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}
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static int
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openin_source_close( thandle_t st )
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{
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VipsSource *source = VIPS_SOURCE( st );
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VIPS_UNREF( source );
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return( 0 );
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}
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static toff_t
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openin_source_length( thandle_t st )
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{
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VipsSource *source = VIPS_SOURCE( st );
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/* libtiff will use this to get file size if tags like StripByteCounts
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* are missing.
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*
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* toff_t is usually uint64, with -1 cast to uint64 to indicate error.
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*/
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return( (toff_t) vips_source_length( source ) );
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}
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static int
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openin_source_map( thandle_t st, tdata_t *start, toff_t *len )
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{
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g_assert_not_reached();
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return( 0 );
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}
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static void
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openin_source_unmap( thandle_t st, tdata_t start, toff_t len )
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{
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g_assert_not_reached();
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return;
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}
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TIFF *
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vips__tiff_openin_source( VipsSource *source )
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{
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TIFF *tiff;
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#ifdef DEBUG
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printf( "vips__tiff_openin_source:\n" );
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#endif /*DEBUG*/
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if( vips_source_rewind( source ) )
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return( NULL );
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/* Disable memory mapped input -- it chews up VM and the performance
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* gain is very small.
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*
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* C enables strip chopping: very large uncompressed strips are
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* chopped into c. 8kb chunks. This can reduce peak memory use for
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* this type of file.
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*/
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if( !(tiff = TIFFClientOpen( "source input", "rmC",
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(thandle_t) source,
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openin_source_read,
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openin_source_write,
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openin_source_seek,
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openin_source_close,
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openin_source_length,
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openin_source_map,
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openin_source_unmap )) ) {
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vips_error( "vips__tiff_openin_source", "%s",
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_( "unable to open source for input" ) );
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return( NULL );
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}
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/* Unreffed on close(), see above.
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*/
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g_object_ref( source );
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return( tiff );
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}
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/* TIFF output to a memory buffer.
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*/
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typedef struct _VipsTiffOpenoutBuffer {
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VipsDbuf dbuf;
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/* On close, consolidate and write the output here.
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*/
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void **out_data;
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size_t *out_length;
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} VipsTiffOpenoutBuffer;
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static tsize_t
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openout_buffer_read( thandle_t st, tdata_t data, tsize_t size )
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{
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VipsTiffOpenoutBuffer *buffer = (VipsTiffOpenoutBuffer *) st;
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#ifdef DEBUG
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printf( "openout_buffer_read: %zd bytes\n", size );
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#endif /*DEBUG*/
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return( vips_dbuf_read( &buffer->dbuf, data, size ) );
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}
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static tsize_t
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openout_buffer_write( thandle_t st, tdata_t data, tsize_t size )
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{
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VipsTiffOpenoutBuffer *buffer = (VipsTiffOpenoutBuffer *) st;
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#ifdef DEBUG
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printf( "openout_buffer_write: %zd bytes\n", size );
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#endif /*DEBUG*/
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vips_dbuf_write( &buffer->dbuf, data, size );
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return( size );
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}
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static int
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openout_buffer_close( thandle_t st )
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{
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VipsTiffOpenoutBuffer *buffer = (VipsTiffOpenoutBuffer *) st;
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*(buffer->out_data) = vips_dbuf_steal( &buffer->dbuf,
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buffer->out_length);
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return( 0 );
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}
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static toff_t
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openout_buffer_seek( thandle_t st, toff_t position, int whence )
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{
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VipsTiffOpenoutBuffer *buffer = (VipsTiffOpenoutBuffer *) st;
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#ifdef DEBUG
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printf( "openout_buffer_seek: position %zd, whence %d ",
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position, whence );
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switch( whence ) {
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case SEEK_SET:
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printf( "set" );
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break;
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case SEEK_END:
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printf( "end" );
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break;
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case SEEK_CUR:
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printf( "cur" );
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break;
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default:
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printf( "unknown" );
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break;
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}
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printf( "\n" );
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#endif /*DEBUG*/
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vips_dbuf_seek( &buffer->dbuf, position, whence );
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return( vips_dbuf_tell( &buffer->dbuf ) );
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}
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static toff_t
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openout_buffer_length( thandle_t st )
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{
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g_assert_not_reached();
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return( 0 );
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}
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static int
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openout_buffer_map( thandle_t st, tdata_t *start, toff_t *len )
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{
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g_assert_not_reached();
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return( 0 );
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}
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static void
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openout_buffer_unmap( thandle_t st, tdata_t start, toff_t len )
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{
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g_assert_not_reached();
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return;
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}
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/* On TIFFClose(), @data and @length are set to point to the output buffer.
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*/
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TIFF *
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vips__tiff_openout_buffer( VipsImage *image,
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gboolean bigtiff, void **out_data, size_t *out_length )
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{
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const char *mode = bigtiff ? "w8" : "w";
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VipsTiffOpenoutBuffer *buffer;
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TIFF *tiff;
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#ifdef DEBUG
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printf( "vips__tiff_openout_buffer:\n" );
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#endif /*DEBUG*/
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g_assert( out_data );
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g_assert( out_length );
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buffer = VIPS_NEW( image, VipsTiffOpenoutBuffer );
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vips_dbuf_init( &buffer->dbuf );
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buffer->out_data = out_data;
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buffer->out_length = out_length;
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if( !(tiff = TIFFClientOpen( "memory output", mode,
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(thandle_t) buffer,
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openout_buffer_read,
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openout_buffer_write,
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openout_buffer_seek,
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openout_buffer_close,
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openout_buffer_length,
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openout_buffer_map,
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openout_buffer_unmap )) ) {
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vips_error( "vips__tiff_openout_buffer", "%s",
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_( "unable to open memory buffer for output" ) );
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return( NULL );
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}
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return( tiff );
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}
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#endif /*HAVE_TIFF*/
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