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merge parallel-read work

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This commit is contained in:
John Cupitt 2012-10-17 00:19:24 +01:00
parent 039ea63bba
commit d629e0cba7
4 changed files with 1 additions and 943 deletions
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5
TODO
View File

@ -1,8 +1,3 @@
- google maps write needs a bg colour option
- get more threading out of SVS read by opening multiple times?
could work for PNG read as well? also very slow
- see

438
libvips/foreign/joined-openslide2vips.c
View File

@ -1,438 +0,0 @@
/* Read a virtual microscope slide using OpenSlide.
*
* Benjamin Gilbert
*
* Copyright (c) 2011-2012 Carnegie Mellon University
*
* 26/11/11
* - initial version
* 27/11/11
* - fix black background in transparent areas
* - no need to set *stop on fill_region() error return
* - add OpenSlide properties to image metadata
* - consolidate setup into one function
* - support reading arbitrary layers
* - use VIPS_ARRAY()
* - add helper to copy a line of pixels
* - support reading associated images
* 7/12/11
* - redirect OpenSlide error logging to vips_error()
* 8/12/11
* - add more exposition to documentation
* 9/12/11
* - unpack to a tile cache
* 11/12/11
* - move argb->rgba into conversion
* - turn into a set of read fns ready to be called from a class
* 28/2/12
* - convert "layer" to "level" where externally visible
* 9/4/12
* - move argb2rgba back in here, we don't have a use for coded pixels
* - small cleanups
* 11/4/12
* - fail if both level and associated image are specified
* 20/9/12
* - update openslide_open error handling for 3.3.0 semantics
* - switch from deprecated _layer_ functions
* 11/10/12
* - look for tile-width and tile-height properties
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#ifdef HAVE_OPENSLIDE
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <vips/vips.h>
#include <vips/debug.h>
#include <openslide.h>
#include "openslide2vips.h"
typedef struct {
openslide_t *osr;
char *associated;
/* Only valid if associated == NULL.
*/
int32_t level;
double downsample;
uint32_t bg;
/* Try to get these from openslide properties.
*/
int tile_width;
int tile_height;
} ReadSlide;
int
vips__openslide_isslide( const char *filename )
{
openslide_t *osr;
const char *vendor;
int ok;
ok = 0;
if( (osr = openslide_open( filename )) ) {
/* Generic tiled tiff images can be opened by openslide as
* well. Only offer to load this file if it's not a generic
* tiff since we want vips_tiffload() to handle these.
*/
vendor = openslide_get_property_value( osr,
OPENSLIDE_PROPERTY_NAME_VENDOR );
/* vendor will be NULL if osr is in error state.
*/
if( vendor &&
strcmp( vendor, "generic-tiff" ) != 0 )
ok = 1;
openslide_close( osr );
}
VIPS_DEBUG_MSG( "vips__openslide_isslide: %s - %d\n", filename, ok );
return( ok );
}
static void
readslide_destroy_cb( VipsImage *image, ReadSlide *rslide )
{
VIPS_FREEF( openslide_close, rslide->osr );
VIPS_FREE( rslide->associated );
}
static int
check_associated_image( openslide_t *osr, const char *name )
{
const char * const *associated;
for( associated = openslide_get_associated_image_names( osr );
*associated != NULL; associated++ )
if( strcmp( *associated, name ) == 0 )
return( 0 );
vips_error( "openslide2vips",
"%s", _( "invalid associated image name" ) );
return( -1 );
}
static ReadSlide *
readslide_new( const char *filename, VipsImage *out,
int level, const char *associated )
{
ReadSlide *rslide;
int64_t w, h;
const char *error;
const char *background;
const char * const *properties;
if( level && associated ) {
vips_error( "openslide2vips",
"%s", _( "specify only one of level or associated "
"image" ) );
return( NULL );
}
rslide = VIPS_NEW( out, ReadSlide );
memset( rslide, 0, sizeof( *rslide ) );
g_signal_connect( out, "close", G_CALLBACK( readslide_destroy_cb ),
rslide );
rslide->level = level;
rslide->associated = g_strdup( associated );
/* Non-crazy defaults, override below if we can.
*/
rslide->tile_width = 256;
rslide->tile_height = 256;
rslide->osr = openslide_open( filename );
if( rslide->osr == NULL ) {
vips_error( "openslide2vips",
"%s", _( "unsupported slide format" ) );
return( NULL );
}
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "opening slide: %s" ), error );
return( NULL );
}
if( level < 0 ||
level >= openslide_get_level_count( rslide->osr ) ) {
vips_error( "openslide2vips",
"%s", _( "invalid slide level" ) );
return( NULL );
}
if( associated &&
check_associated_image( rslide->osr, associated ) )
return( NULL );
if( associated ) {
openslide_get_associated_image_dimensions( rslide->osr,
associated, &w, &h );
vips_image_set_string( out, "slide-associated-image",
associated );
vips_demand_hint( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
}
else {
char buf[256];
const char *value;
openslide_get_level_dimensions( rslide->osr,
level, &w, &h );
rslide->downsample = openslide_get_level_downsample(
rslide->osr, level );
vips_image_set_int( out, "slide-level", level );
vips_demand_hint( out, VIPS_DEMAND_STYLE_SMALLTILE, NULL );
/* Try to get tile width/height. An undocumented, experimental
* feature.
*/
vips_snprintf( buf, 256,
"openslide.level[%d].tile-width", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_width = atoi( value );
vips_snprintf( buf, 256,
"openslide.level[%d].tile-height", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_height = atoi( value );
if( value )
VIPS_DEBUG_MSG( "readslide_new: found tile-size\n" );
}
rslide->bg = 0xffffff;
if( (background = openslide_get_property_value( rslide->osr,
OPENSLIDE_PROPERTY_NAME_BACKGROUND_COLOR )) )
rslide->bg = strtoul( background, NULL, 16 );
if( w < 0 || h < 0 || rslide->downsample < 0 ) {
vips_error( "openslide2vips", _( "getting dimensions: %s" ),
openslide_get_error( rslide->osr ) );
return( NULL );
}
if( w > INT_MAX ||
h > INT_MAX ) {
vips_error( "openslide2vips",
"%s", _( "image dimensions overflow int" ) );
return( NULL );
}
vips_image_init_fields( out, w, h, 4, VIPS_FORMAT_UCHAR,
VIPS_CODING_NONE, VIPS_INTERPRETATION_RGB, 1.0, 1.0 );
for( properties = openslide_get_property_names( rslide->osr );
*properties != NULL; properties++ )
vips_image_set_string( out, *properties,
openslide_get_property_value( rslide->osr,
*properties ) );
associated = g_strjoinv( ", ", (char **)
openslide_get_associated_image_names( rslide->osr ) );
vips_image_set_string( out, "slide-associated-images", associated );
return( rslide );
}
int
vips__openslide_read_header( const char *filename, VipsImage *out,
int level, char *associated )
{
ReadSlide *rslide;
if( !(rslide = readslide_new( filename, out, level, associated )) )
return( -1 );
return( 0 );
}
static int
vips__openslide_generate( VipsRegion *out,
void *_seq, void *_rslide, void *unused, gboolean *stop )
{
ReadSlide *rslide = _rslide;
uint32_t bg = rslide->bg;
VipsRect *r = &out->valid;
int n = r->width * r->height;
uint32_t *buf = (uint32_t *) VIPS_REGION_ADDR( out, r->left, r->top );
const char *error;
int i;
VIPS_DEBUG_MSG( "vips__openslide_generate: %dx%d @ %dx%d\n",
r->width, r->height, r->left, r->top );
/*
printf( "vips__openslide_generate: %p %dx%d @ %dx%d\n",
g_thread_self(),
r->width, r->height, r->left, r->top );
*/
/* We're inside a cache, so requests should always be
* tile_width by tile_height pixels and on a tile boundary.
*/
g_assert( (r->left % rslide->tile_width) == 0 );
g_assert( (r->top % rslide->tile_height) == 0 );
g_assert( r->width <= rslide->tile_width );
/* The memory on the region should be contiguous for our ARGB->RGBA
* loop below.
*/
g_assert( VIPS_REGION_LSKIP( out ) == r->width * 4 );
openslide_read_region( rslide->osr,
buf,
r->left * rslide->downsample,
r->top * rslide->downsample,
rslide->level,
r->width, r->height );
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "reading region: %s" ), error );
return( -1 );
}
/* Convert from ARGB to RGBA and undo premultiplication. Since we are
* inside a cache, we know buf must be continuous.
*/
for( i = 0; i < n; i++ ) {
uint32_t *p = buf + i;
uint32_t x = *p;
uint8_t a = x >> 24;
VipsPel *out = (VipsPel *) p;
if( a != 0 ) {
out[0] = 255 * ((x >> 16) & 255) / a;
out[1] = 255 * ((x >> 8) & 255) / a;
out[2] = 255 * (x & 255) / a;
out[3] = a;
}
else {
/* Use background color.
*/
out[0] = (bg >> 16) & 255;
out[1] = (bg >> 8) & 255;
out[2] = bg & 255;
out[3] = 0;
}
}
return( 0 );
}
int
vips__openslide_read( const char *filename, VipsImage *out, int level )
{
ReadSlide *rslide;
VipsImage *raw;
VipsImage *t;
VIPS_DEBUG_MSG( "vips__openslide_read: %s %d\n",
filename, level );
raw = vips_image_new();
vips_object_local( out, raw );
if( !(rslide = readslide_new( filename, raw, level, NULL )) )
return( -1 );
if( vips_image_generate( raw,
NULL, vips__openslide_generate, NULL, rslide, NULL ) )
return( -1 );
/* Copy to out, adding a cache. Enough tiles for a complete row, plus
* 50%.
*/
if( vips_tilecache( raw, &t,
"tile_width", rslide->tile_width,
"tile_height", rslide->tile_height,
"max_tiles",
(int) (1.5 * (1 + raw->Xsize / rslide->tile_width)),
"threaded", TRUE,
NULL ) )
return( -1 );
if( vips_image_write( t, out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
int
vips__openslide_read_associated( const char *filename, VipsImage *out,
const char *associated )
{
ReadSlide *rslide;
VipsImage *raw;
const char *error;
VIPS_DEBUG_MSG( "vips__openslide_read_associated: %s %s\n",
filename, associated );
/* Memory buffer. Get associated directly to this, then copy to out.
*/
raw = vips_image_new_buffer();
vips_object_local( out, raw );
if( !(rslide = readslide_new( filename, raw, 0, associated )) ||
vips_image_write_prepare( raw ) )
return( -1 );
openslide_read_associated_image( rslide->osr, rslide->associated,
(uint32_t *) VIPS_IMAGE_ADDR( raw, 0, 0 ) );
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "reading associated image: %s" ), error );
return( -1 );
}
if( vips_image_write( raw, out ) )
return( -1 );
return( 0 );
}
#endif /*HAVE_OPENSLIDE*/

1
libvips/foreign/openslide2vips.c
View File

@ -36,6 +36,7 @@
* - switch from deprecated _layer_ functions
* 11/10/12
* - look for tile-width and tile-height properties
* - use threaded tile cache
*/
/*

500
libvips/foreign/split-openslide2vips.c
View File

@ -1,500 +0,0 @@
/* Read a virtual microscope slide using OpenSlide.
*
* Benjamin Gilbert
*
* Copyright (c) 2011-2012 Carnegie Mellon University
*
* 26/11/11
* - initial version
* 27/11/11
* - fix black background in transparent areas
* - no need to set *stop on fill_region() error return
* - add OpenSlide properties to image metadata
* - consolidate setup into one function
* - support reading arbitrary layers
* - use VIPS_ARRAY()
* - add helper to copy a line of pixels
* - support reading associated images
* 7/12/11
* - redirect OpenSlide error logging to vips_error()
* 8/12/11
* - add more exposition to documentation
* 9/12/11
* - unpack to a tile cache
* 11/12/11
* - move argb->rgba into conversion
* - turn into a set of read fns ready to be called from a class
* 28/2/12
* - convert "layer" to "level" where externally visible
* 9/4/12
* - move argb2rgba back in here, we don't have a use for coded pixels
* - small cleanups
* 11/4/12
* - fail if both level and associated image are specified
* 20/9/12
* - update openslide_open error handling for 3.3.0 semantics
* - switch from deprecated _layer_ functions
* 4/10/12
* - open the image once for each thread, so we get some parallelism on
* decode
* 11/10/12
* - look for tile-width and tile-height properties
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#ifdef HAVE_OPENSLIDE
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <vips/vips.h>
#include <vips/debug.h>
#include <openslide.h>
#include "openslide2vips.h"
typedef struct {
openslide_t *osr;
char *filename;
char *associated;
/* Only valid if associated == NULL.
*/
int32_t level;
double downsample;
uint32_t bg;
/* Try to get these from openslide properties.
*/
int tile_width;
int tile_height;
} ReadSlide;
int
vips__openslide_isslide( const char *filename )
{
openslide_t *osr;
const char *vendor;
int ok;
ok = 0;
if( (osr = openslide_open( filename )) ) {
/* Generic tiled tiff images can be opened by openslide as
* well. Only offer to load this file if it's not a generic
* tiff since we want vips_tiffload() to handle these.
*/
vendor = openslide_get_property_value( osr,
OPENSLIDE_PROPERTY_NAME_VENDOR );
/* vendor will be NULL if osr is in error state.
*/
if( vendor &&
strcmp( vendor, "generic-tiff" ) != 0 )
ok = 1;
openslide_close( osr );
}
VIPS_DEBUG_MSG( "vips__openslide_isslide: %s - %d\n", filename, ok );
return( ok );
}
static void
readslide_destroy_cb( VipsImage *image, ReadSlide *rslide )
{
VIPS_FREEF( openslide_close, rslide->osr );
VIPS_FREE( rslide->associated );
}
static int
check_associated_image( openslide_t *osr, const char *name )
{
const char * const *associated;
for( associated = openslide_get_associated_image_names( osr );
*associated != NULL; associated++ )
if( strcmp( *associated, name ) == 0 )
return( 0 );
vips_error( "openslide2vips",
"%s", _( "invalid associated image name" ) );
return( -1 );
}
static ReadSlide *
readslide_new( const char *filename, VipsImage *out,
int level, const char *associated )
{
ReadSlide *rslide;
int64_t w, h;
const char *error;
const char *background;
const char * const *properties;
if( level && associated ) {
vips_error( "openslide2vips",
"%s", _( "specify only one of level or associated "
"image" ) );
return( NULL );
}
rslide = VIPS_NEW( out, ReadSlide );
memset( rslide, 0, sizeof( *rslide ) );
g_signal_connect( out, "close", G_CALLBACK( readslide_destroy_cb ),
rslide );
rslide->filename = g_strdup( filename );
rslide->level = level;
rslide->associated = g_strdup( associated );
/* Non-crazy defaults, override below if we can.
*/
rslide->tile_width = 256;
rslide->tile_height = 256;
rslide->osr = openslide_open( rslide->filename );
if( rslide->osr == NULL ) {
vips_error( "openslide2vips",
"%s", _( "unsupported slide format" ) );
return( NULL );
}
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "opening slide: %s" ), error );
return( NULL );
}
if( level < 0 ||
level >= openslide_get_level_count( rslide->osr ) ) {
vips_error( "openslide2vips",
"%s", _( "invalid slide level" ) );
return( NULL );
}
if( associated &&
check_associated_image( rslide->osr, associated ) )
return( NULL );
if( associated ) {
openslide_get_associated_image_dimensions( rslide->osr,
associated, &w, &h );
vips_image_set_string( out, "slide-associated-image",
associated );
vips_demand_hint( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
}
else {
char buf[256];
const char *value;
openslide_get_level_dimensions( rslide->osr,
level, &w, &h );
rslide->downsample = openslide_get_level_downsample(
rslide->osr, level );
vips_image_set_int( out, "slide-level", level );
vips_demand_hint( out, VIPS_DEMAND_STYLE_SMALLTILE, NULL );
/* Try to get tile width/height. An undocumented, experimental
* feature.
*/
vips_snprintf( buf, 256,
"openslide.level[%d].tile-width", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_width = atoi( value );
vips_snprintf( buf, 256,
"openslide.level[%d].tile-height", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_height = atoi( value );
if( value )
VIPS_DEBUG_MSG( "readslide_new: found tile-size\n" );
}
rslide->bg = 0xffffff;
if( (background = openslide_get_property_value( rslide->osr,
OPENSLIDE_PROPERTY_NAME_BACKGROUND_COLOR )) )
rslide->bg = strtoul( background, NULL, 16 );
if( w < 0 || h < 0 || rslide->downsample < 0 ) {
vips_error( "openslide2vips", _( "getting dimensions: %s" ),
openslide_get_error( rslide->osr ) );
return( NULL );
}
if( w > INT_MAX ||
h > INT_MAX ) {
vips_error( "openslide2vips",
"%s", _( "image dimensions overflow int" ) );
return( NULL );
}
vips_image_init_fields( out, w, h, 4, VIPS_FORMAT_UCHAR,
VIPS_CODING_NONE, VIPS_INTERPRETATION_RGB, 1.0, 1.0 );
for( properties = openslide_get_property_names( rslide->osr );
*properties != NULL; properties++ )
vips_image_set_string( out, *properties,
openslide_get_property_value( rslide->osr,
*properties ) );
associated = g_strjoinv( ", ", (char **)
openslide_get_associated_image_names( rslide->osr ) );
vips_image_set_string( out, "slide-associated-images", associated );
return( rslide );
}
int
vips__openslide_read_header( const char *filename, VipsImage *out,
int level, char *associated )
{
ReadSlide *rslide;
if( !(rslide = readslide_new( filename, out, level, associated )) )
return( -1 );
return( 0 );
}
/* One of these for each thread.
*/
typedef struct {
openslide_t *osr;
/* A mem buffer we can read to. This must be continuous.
*/
uint32_t *buf;
size_t size;
} Seq;
static void *
vips__openslide_start( VipsImage *out, void *_rslide, void *unused )
{
ReadSlide *rslide = _rslide;
Seq *seq;
if( !(seq = VIPS_NEW( out, Seq )) )
return( NULL );
seq->buf = NULL;
if( !(seq->osr = openslide_open( rslide->filename )) ) {
vips_error( "openslide2vips",
"%s", _( "unsupported slide format" ) );
return( NULL );
}
return( (void *) seq );
}
static int
vips__openslide_generate( VipsRegion *out,
void *_seq, void *_rslide, void *unused, gboolean *stop )
{
Seq *seq = (Seq *) _seq;
ReadSlide *rslide = _rslide;
uint32_t bg = rslide->bg;
VipsRect *r = &out->valid;
uint32_t *p;
const char *error;
int x, y;
VIPS_DEBUG_MSG( "vips__openslide_generate: %dx%d @ %dx%d\n",
r->width, r->height, r->left, r->top );
/* Make sure our buffer is large enough.
*/
if( !seq->buf ||
(size_t) r->width * r->height > seq->size ) {
seq->size = (size_t) r->width * r->height;
VIPS_FREE( seq->buf );
if( !(seq->buf = (uint32_t *) VIPS_ARRAY( NULL, seq->size,
uint32_t )) )
return( -1 );
}
/* We're inside a cache, so requests should always be
* tile_width by tile_height pixels and on a tile boundary.
*/
g_assert( (r->left % rslide->tile_width) == 0 );
g_assert( (r->top % rslide->tile_height) == 0 );
g_assert( r->width <= rslide->tile_width );
g_assert( r->height <= rslide->tile_height );
openslide_read_region( seq->osr,
seq->buf,
r->left * rslide->downsample,
r->top * rslide->downsample,
rslide->level,
r->width, r->height );
error = openslide_get_error( seq->osr );
if( error ) {
vips_error( "openslide2vips",
_( "reading region: %s" ), error );
return( -1 );
}
/* Convert from ARGB to RGBA and undo premultiplication.
*/
p = seq->buf;
for( y = 0; y < r->height; y++ ) {
VipsPel *q = (VipsPel *)
VIPS_REGION_ADDR( out, r->left, r->top + y );
for( x = 0; x < r->width; x++ ) {
uint32_t b = p[x];
uint8_t a = b >> 24;
if( a != 0 ) {
q[0] = 255 * ((b >> 16) & 255) / a;
q[1] = 255 * ((b >> 8) & 255) / a;
q[2] = 255 * (b & 255) / a;
q[3] = b;
}
else {
/* Use background color.
*/
q[0] = (bg >> 16) & 255;
q[1] = (bg >> 8) & 255;
q[2] = bg & 255;
q[3] = 0;
}
q += 4;
}
p += r->width;
}
return( 0 );
}
static int
vips__openslide_stop( void *_seq, void *a, void *b )
{
Seq *seq = (Seq *) _seq;
VIPS_FREEF( openslide_close, seq->osr );
VIPS_FREE( seq->buf );
return( 0 );
}
int
vips__openslide_read( const char *filename, VipsImage *out, int level )
{
ReadSlide *rslide;
VIPS_DEBUG_MSG( "vips__openslide_read: %s %d\n",
filename, level );
/* Tile cache: keep enough for two complete rows of tiles. OpenSlide
* has its own tile cache, but it's not large enough for a complete
* scan line.
*/
VipsImage *raw;
VipsImage *t;
raw = vips_image_new();
vips_object_local( out, raw );
if( !(rslide = readslide_new( filename, raw, level, NULL )) )
return( -1 );
if( vips_image_generate( raw,
vips__openslide_start,
vips__openslide_generate,
vips__openslide_stop,
rslide, NULL ) )
return( -1 );
/* Copy to out, adding a cache. Enough tiles for a complete row, plus
* 50%.
*/
if( vips_tilecache( raw, &t,
"tile_width", rslide->tile_width,
"tile_height", rslide->tile_height,
"max_tiles",
(int) (1.5 * (1 + raw->Xsize / rslide->tile_width)),
"threaded", TRUE,
NULL ) )
return( -1 );
if( vips_image_write( t, out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
int
vips__openslide_read_associated( const char *filename, VipsImage *out,
const char *associated )
{
ReadSlide *rslide;
VipsImage *raw;
const char *error;
VIPS_DEBUG_MSG( "vips__openslide_read_associated: %s %s\n",
filename, associated );
/* Memory buffer. Get associated directly to this, then copy to out.
*/
raw = vips_image_new_buffer();
vips_object_local( out, raw );
if( !(rslide = readslide_new( filename, raw, 0, associated )) ||
vips_image_write_prepare( raw ) )
return( -1 );
openslide_read_associated_image( rslide->osr, rslide->associated,
(uint32_t *) VIPS_IMAGE_ADDR( raw, 0, 0 ) );
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "reading associated image: %s" ), error );
return( -1 );
}
if( vips_image_write( raw, out ) )
return( -1 );
return( 0 );
}
#endif /*HAVE_OPENSLIDE*/