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imageinfo.c
2367 lines (1938 loc) · 54.3 KB
/
imageinfo.c
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/* image management ... a layer over the VIPS IMAGE type
*/
/*
Copyright (C) 1991-2003 The National Gallery
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU 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
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
jobs:
- reference counting layer ... in Managed base class, plus links to heap
garbage collection
- filesystem tracking: we stat open files and signal file_changed if we see a
change
- cache: several open( "fred.v" )s share a single Imageinfo, provided their
mtimes are all the same
- lookup table management ... if an operation can work with pixel lookup
tables (found by examining a flag in the VIPS function descriptor), then
instead of operating on the image, the operation runs on the LUT associated
with that image ... Imageinfo tracks the LUTs representing delayed eval
- dependency tracking ... an imageinfo can require several other imageinfos
to be open for it to work properly; we follow these dependencies, and
delay destroying an imageinfo until it's not required by any others
- temp file management ... we can make temp images on disc; we unlink() these
temps when they're no longer needed
- imageinfo/expr association tracking ... we track when an expr
receives an imageinfo as its value; the info is used to get region views
to display in the right image ... see expr_real_new_value()
- paint stuff: also undo/redo buffers, each with a "*_changed" signal
*/
/*
more stuff:
while we transition to vips8, also use imageinfo to wrap VipsImage
most of the jobs above are pushed down into vips8 now ... except for
- reference counting layer ... in Managed base class
- filesystem tracking: we stat open files and signal file_changed if we see a
change
- cache: several open( "fred.v" )s share a single Imageinfo, provided their
mtimes are all the same
*/
#include "ip.h"
/*
#define DEBUG
#define DEBUG_MAKE
#define DEBUG_RGB
#define DEBUG_CHECK
#define DEBUG_OPEN
*/
static iContainerClass *imageinfogroup_parent_class = NULL;
static void
imageinfogroup_finalize( GObject *gobject )
{
Imageinfogroup *imageinfogroup = IMAGEINFOGROUP( gobject );
IM_FREEF( g_hash_table_destroy, imageinfogroup->filename_hash );
G_OBJECT_CLASS( imageinfogroup_parent_class )->finalize( gobject );
}
static void
imageinfogroup_child_add( iContainer *parent, iContainer *child, int pos )
{
Imageinfogroup *imageinfogroup = IMAGEINFOGROUP( parent );
Imageinfo *imageinfo = IMAGEINFO( child );
const char *name = IOBJECT( imageinfo )->name;
GSList *hits;
hits = (GSList *) g_hash_table_lookup( imageinfogroup->filename_hash,
name );
hits = g_slist_prepend( hits, imageinfo );
g_hash_table_insert( imageinfogroup->filename_hash,
(gpointer) name, (gpointer) hits );
ICONTAINER_CLASS( imageinfogroup_parent_class )->
child_add( parent, child, pos );
}
static void
imageinfogroup_child_remove( iContainer *parent, iContainer *child )
{
Imageinfogroup *imageinfogroup = IMAGEINFOGROUP( parent );
Imageinfo *imageinfo = IMAGEINFO( child );
const char *name = IOBJECT( imageinfo )->name;
GSList *hits;
hits = (GSList *) g_hash_table_lookup( imageinfogroup->filename_hash,
name );
g_assert( hits );
hits = g_slist_remove( hits, imageinfo );
/* child is going away (probably), so we don't want to link hits back
* on again with child->name as the key ... if possible, look down
* hits for another name we can use instead.
*/
if( hits ) {
const char *new_name = IOBJECT( hits->data )->name;
g_hash_table_replace( imageinfogroup->filename_hash,
(gpointer) new_name, (gpointer) hits );
}
else
g_hash_table_remove( imageinfogroup->filename_hash,
(gpointer) name );
ICONTAINER_CLASS( imageinfogroup_parent_class )->
child_remove( parent, child );
}
static void
imageinfogroup_class_init( ImageinfogroupClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
iContainerClass *icontainer_class = ICONTAINER_CLASS( class );
imageinfogroup_parent_class = g_type_class_peek_parent( class );
gobject_class->finalize = imageinfogroup_finalize;
icontainer_class->child_add = imageinfogroup_child_add;
icontainer_class->child_remove = imageinfogroup_child_remove;
}
static void
imageinfogroup_init( Imageinfogroup *imageinfogroup )
{
#ifdef DEBUG
printf( "imageinfogroup_init\n" );
#endif /*DEBUG*/
imageinfogroup->filename_hash =
g_hash_table_new( g_str_hash, g_str_equal );
}
GType
imageinfogroup_get_type( void )
{
static GType imageinfogroup_type = 0;
if( !imageinfogroup_type ) {
static const GTypeInfo info = {
sizeof( ImageinfogroupClass ),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) imageinfogroup_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof( Imageinfogroup ),
32, /* n_preallocs */
(GInstanceInitFunc) imageinfogroup_init,
};
imageinfogroup_type = g_type_register_static( TYPE_ICONTAINER,
"Imageinfogroup", &info, 0 );
}
return( imageinfogroup_type );
}
Imageinfogroup *
imageinfogroup_new( void )
{
Imageinfogroup *imageinfogroup = IMAGEINFOGROUP(
g_object_new( TYPE_IMAGEINFOGROUP, NULL ) );
return( imageinfogroup );
}
static void *
imageinfogroup_lookup_test( Imageinfo *imageinfo, struct stat *buf )
{
const char *name = IOBJECT( imageinfo )->name;
if( name && buf->st_mtime == imageinfo->mtime )
return( imageinfo );
return( NULL );
}
/* Look up by filename ... mtimes have to match too.
*/
static Imageinfo *
imageinfogroup_lookup( Imageinfogroup *imageinfogroup, const char *filename )
{
GSList *hits;
Imageinfo *imageinfo;
struct stat buf;
if( stat( filename, &buf ) == 0 &&
(hits = (GSList *) g_hash_table_lookup(
imageinfogroup->filename_hash, filename )) &&
(imageinfo = IMAGEINFO( slist_map( hits,
(SListMapFn) imageinfogroup_lookup_test, &buf ) )) )
return( imageinfo );
return( NULL );
}
/* Our signals.
*/
enum {
SIG_AREA_CHANGED, /* Area of image has changed: update screen */
SIG_AREA_PAINTED, /* Area of image has been painted */
SIG_UNDO_CHANGED, /* Undo/redo state has changed */
SIG_FILE_CHANGED, /* Underlying file seems to have changed */
SIG_INVALIDATE, /* IMAGE* has been invalidated */
SIG_LAST
};
static ManagedClass *parent_class = NULL;
static guint imageinfo_signals[SIG_LAST] = { 0 };
#if defined(DEBUG) || defined(DEBUG_OPEN) || defined(DEBUG_RGB) || \
defined(DEBUG_CHECK) || defined(DEBUG_MAKE)
static void
imageinfo_print( Imageinfo *imageinfo )
{
printf( " \"%s\" mtime = %d (%p)\n",
IOBJECT( imageinfo )->name,
(int) imageinfo->mtime,
imageinfo );
}
#endif
void *
imageinfo_area_changed( Imageinfo *imageinfo, Rect *dirty )
{
g_assert( IS_IMAGEINFO( imageinfo ) );
#ifdef DEBUG
printf( "imageinfo_area_changed: "
"left = %d, top = %d, width = %d, height = %d\n",
dirty->left, dirty->top, dirty->width, dirty->height );
#endif /*DEBUG*/
g_signal_emit( G_OBJECT( imageinfo ),
imageinfo_signals[SIG_AREA_CHANGED], 0, dirty );
return( NULL );
}
void *
imageinfo_area_painted( Imageinfo *imageinfo, Rect *dirty )
{
g_assert( IS_IMAGEINFO( imageinfo ) );
#ifdef DEBUG
printf( "imageinfo_area_painted: left = %d, top = %d, "
"width = %d, height = %d\n",
dirty->left, dirty->top, dirty->width, dirty->height );
#endif /*DEBUG*/
g_signal_emit( G_OBJECT( imageinfo ),
imageinfo_signals[SIG_AREA_PAINTED], 0, dirty );
return( NULL );
}
static void *
imageinfo_undo_changed( Imageinfo *imageinfo )
{
g_assert( IS_IMAGEINFO( imageinfo ) );
g_signal_emit( G_OBJECT( imageinfo ),
imageinfo_signals[SIG_UNDO_CHANGED], 0 );
return( NULL );
}
static void *
imageinfo_file_changed( Imageinfo *imageinfo )
{
g_assert( IS_IMAGEINFO( imageinfo ) );
#ifdef DEBUG_CHECK
printf( "imageinfo_file_changed:" );
imageinfo_print( imageinfo );
#endif /*DEBUG_CHECK*/
g_signal_emit( G_OBJECT( imageinfo ),
imageinfo_signals[SIG_FILE_CHANGED], 0 );
return( NULL );
}
static void *
imageinfo_invalidate( Imageinfo *imageinfo )
{
g_assert( IS_IMAGEINFO( imageinfo ) );
#ifdef DEBUG_CHECK
printf( "imageinfo_invalidate:" );
imageinfo_print( imageinfo );
#endif /*DEBUG_CHECK*/
g_signal_emit( G_OBJECT( imageinfo ),
imageinfo_signals[SIG_INVALIDATE], 0 );
return( NULL );
}
void
imageinfo_expr_add( Imageinfo *imageinfo, Expr *expr )
{
#ifdef DEBUG
printf( "imageinfo_expr_add: " );
expr_name_print( expr );
printf( "has imageinfo \"%s\" as value\n", imageinfo->im->filename );
#endif /*DEBUG*/
g_assert( !g_slist_find( imageinfo->exprs, expr ) );
g_assert( !expr->imageinfo );
expr->imageinfo = imageinfo;
imageinfo->exprs = g_slist_prepend( imageinfo->exprs, expr );
}
void *
imageinfo_expr_remove( Expr *expr, Imageinfo *imageinfo )
{
#ifdef DEBUG
printf( "imageinfo_expr_remove: " );
expr_name_print( expr );
printf( "has lost imageinfo \"%s\" as value\n",
imageinfo->im->filename );
#endif /*DEBUG*/
g_assert( expr->imageinfo );
g_assert( g_slist_find( imageinfo->exprs, expr ) );
g_assert( expr->imageinfo == imageinfo );
expr->imageinfo = NULL;
imageinfo->exprs = g_slist_remove( imageinfo->exprs, expr );
return( NULL );
}
GSList *
imageinfo_expr_which( Imageinfo *imageinfo )
{
return( imageinfo->exprs );
}
/* Find the underlying image in an imageinfo.
*/
IMAGE *
imageinfo_get_underlying( Imageinfo *imageinfo )
{
if( imageinfo->underlying )
return( imageinfo_get_underlying( imageinfo->underlying ) );
else
return( imageinfo->im );
}
/* Free up an undo fragment.
*/
static void
imageinfo_undofragment_free( Undofragment *frag )
{
IM_FREEF( im_close, frag->im );
IM_FREE( frag );
}
/* Free an undo buffer.
*/
static void
imageinfo_undobuffer_free( Undobuffer *undo )
{
slist_map( undo->frags,
(SListMapFn) imageinfo_undofragment_free, NULL );
IM_FREEF( g_slist_free, undo->frags );
IM_FREE( undo );
}
/* Free all undo information attached to an imageinfo.
*/
static void
imageinfo_undo_free( Imageinfo *imageinfo )
{
slist_map( imageinfo->redo,
(SListMapFn) imageinfo_undobuffer_free, NULL );
IM_FREEF( g_slist_free, imageinfo->redo );
slist_map( imageinfo->undo,
(SListMapFn) imageinfo_undobuffer_free, NULL );
IM_FREEF( g_slist_free, imageinfo->undo );
IM_FREEF( imageinfo_undobuffer_free, imageinfo->cundo );
}
static void
imageinfo_dispose_eval( Imageinfo *imageinfo )
{
imageinfo->monitored = FALSE;
/* Make sure any callbacks from the IMAGE stop working.
*/
if( imageinfo->proxy ) {
imageinfo->proxy->imageinfo = NULL;
imageinfo->proxy = NULL;
}
}
static void
imageinfo_dispose( GObject *gobject )
{
Imageinfo *imageinfo = IMAGEINFO( gobject );
#ifdef DEBUG_OPEN
printf( "imageinfo_dispose:" );
imageinfo_print( imageinfo );
#endif /*DEBUG_OPEN*/
slist_map( imageinfo->exprs,
(SListMapFn) imageinfo_expr_remove, imageinfo );
g_assert( !imageinfo->exprs );
imageinfo_dispose_eval( imageinfo );
IM_FREEF( g_source_remove, imageinfo->check_tid );
G_OBJECT_CLASS( parent_class )->dispose( gobject );
}
/* Final death!
*/
static void
imageinfo_finalize( GObject *gobject )
{
Imageinfo *imageinfo = IMAGEINFO( gobject );
gboolean isfile = imageinfo->im ? im_isfile( imageinfo->im ) : FALSE;
char name[FILENAME_MAX];
#ifdef DEBUG_MAKE
printf( "imageinfo_finalize:" );
imageinfo_print( imageinfo );
#endif /*DEBUG_MAKE*/
if( imageinfo->dfile && isfile ) {
/* We must close before we delete ... save the filename.
*/
im_strncpy( name, imageinfo->im->filename, FILENAME_MAX - 5 );
#ifdef DEBUG_OPEN
printf( "imageinfo_destroy: unlinking \"%s\"\n", name );
#endif /*DEBUG_OPEN*/
}
IM_FREEF( im_close, imageinfo->im );
IM_FREEF( im_close, imageinfo->mapped_im );
IM_FREEF( im_close, imageinfo->identity_lut );
if( imageinfo->dfile && isfile ) {
unlinkf( "%s", name );
iobject_changed( IOBJECT( main_imageinfogroup ) );
}
MANAGED_UNREF( imageinfo->underlying );
imageinfo_undo_free( imageinfo );
G_OBJECT_CLASS( parent_class )->finalize( gobject );
}
/* Make an info string about an imageinfo.
*/
static void
imageinfo_info( iObject *iobject, VipsBuf *buf )
{
Imageinfo *imageinfo = IMAGEINFO( iobject );
vips_buf_appendi( buf, imageinfo_get( FALSE, imageinfo ) );
/* Don't chain up to parent->info(), we don't want all the other
* stuff, this is going to be used for a caption.
*/
}
static void
imageinfo_real_area_changed( Imageinfo *imageinfo, Rect *dirty )
{
}
static void
imageinfo_real_area_painted( Imageinfo *imageinfo, Rect *dirty )
{
/* Cache attaches to this signal and invalidates on paint. Trigger a
* repaint in turn.
*/
imageinfo_area_changed( imageinfo, dirty );
}
static void
imageinfo_real_undo_changed( Imageinfo *imageinfo )
{
}
static void
imageinfo_real_file_changed( Imageinfo *imageinfo )
{
}
static void
imageinfo_real_invalidate( Imageinfo *imageinfo )
{
}
static void
imageinfo_class_init( ImageinfoClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
iObjectClass *iobject_class = IOBJECT_CLASS( class );
ManagedClass *managed_class = MANAGED_CLASS( class );
parent_class = g_type_class_peek_parent( class );
gobject_class->dispose = imageinfo_dispose;
gobject_class->finalize = imageinfo_finalize;
iobject_class->info = imageinfo_info;
/* Timeout on unreffed images.
*/
managed_class->keepalive = 60.0;
class->area_changed = imageinfo_real_area_changed;
class->area_painted = imageinfo_real_area_painted;
class->undo_changed = imageinfo_real_undo_changed;
class->file_changed = imageinfo_real_file_changed;
class->invalidate = imageinfo_real_invalidate;
/* Create signals.
*/
imageinfo_signals[SIG_AREA_CHANGED] = g_signal_new( "area_changed",
G_OBJECT_CLASS_TYPE( gobject_class ),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET( ImageinfoClass, area_changed ),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER );
imageinfo_signals[SIG_AREA_PAINTED] = g_signal_new( "area_painted",
G_OBJECT_CLASS_TYPE( gobject_class ),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET( ImageinfoClass, area_painted ),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER );
imageinfo_signals[SIG_UNDO_CHANGED] = g_signal_new( "undo_changed",
G_OBJECT_CLASS_TYPE( gobject_class ),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET( ImageinfoClass, undo_changed ),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0 );
imageinfo_signals[SIG_FILE_CHANGED] = g_signal_new( "file_changed",
G_OBJECT_CLASS_TYPE( gobject_class ),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET( ImageinfoClass, file_changed ),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0 );
imageinfo_signals[SIG_INVALIDATE] = g_signal_new( "invalidate",
G_OBJECT_CLASS_TYPE( gobject_class ),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET( ImageinfoClass, invalidate ),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0 );
}
static void
imageinfo_init( Imageinfo *imageinfo )
{
#ifdef DEBUG_MAKE
printf( "imageinfo_init: %p\n", imageinfo );
#endif /*DEBUG_MAKE*/
imageinfo->im = NULL;
imageinfo->mapped_im = NULL;
imageinfo->identity_lut = NULL;
imageinfo->underlying = NULL;
imageinfo->proxy = NULL;
imageinfo->dfile = FALSE;
imageinfo->from_file = FALSE;
imageinfo->mtime = 0;
imageinfo->exprs = NULL;
imageinfo->ok_to_paint = FALSE;
imageinfo->undo = NULL;
imageinfo->redo = NULL;
imageinfo->cundo = NULL;
imageinfo->monitored = FALSE;
imageinfo->check_mtime = 0;
imageinfo->check_tid = 0;
}
GType
imageinfo_get_type( void )
{
static GType type = 0;
if( !type ) {
static const GTypeInfo info = {
sizeof( ImageinfoClass ),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) imageinfo_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof( Imageinfo ),
32, /* n_preallocs */
(GInstanceInitFunc) imageinfo_init,
};
type = g_type_register_static( TYPE_MANAGED,
"Imageinfo", &info, 0 );
}
return( type );
}
static int
imageinfo_proxy_eval( Imageinfoproxy *proxy )
{
Imageinfo *imageinfo = proxy->imageinfo;
if( imageinfo && imageinfo->im->time )
if( progress_update_percent( imageinfo->im->time->percent,
imageinfo->im->time->eta ) )
return( -1 );
return( 0 );
}
static int
imageinfo_proxy_invalidate( Imageinfoproxy *proxy )
{
Imageinfo *imageinfo = proxy->imageinfo;
if( imageinfo )
imageinfo_invalidate( imageinfo );
return( 0 );
}
static int
imageinfo_proxy_preclose( Imageinfoproxy *proxy )
{
Imageinfo *imageinfo = proxy->imageinfo;
/* Remove everything related to progress.
*/
if( imageinfo )
imageinfo_dispose_eval( imageinfo );
return( 0 );
}
/* Add a proxy to track IMAGE events.
*/
static void
imageinfo_proxy_add( Imageinfo *imageinfo )
{
/* Only if we're running interactively.
*/
if( !main_window_top )
return;
/* Already being monitored?
*/
if( imageinfo->monitored )
return;
imageinfo->monitored = TRUE;
/* Need a proxy on IMAGE.
*/
g_assert( !imageinfo->proxy );
if( !(imageinfo->proxy = IM_NEW( imageinfo->im, Imageinfoproxy )) )
if( !(imageinfo->proxy = IM_NEW( NULL, Imageinfoproxy )) )
return;
imageinfo->proxy->im = imageinfo->im;
imageinfo->proxy->imageinfo = imageinfo;
(void) im_add_eval_callback( imageinfo->im,
(im_callback_fn) imageinfo_proxy_eval,
imageinfo->proxy, NULL );
(void) im_add_invalidate_callback( imageinfo->im,
(im_callback_fn) imageinfo_proxy_invalidate,
imageinfo->proxy, NULL );
/* Has to be preclose, because we want to be sure we disconnect before
* the proxy is freed on a close callback.
*/
(void) im_add_preclose_callback( imageinfo->im,
(im_callback_fn) imageinfo_proxy_preclose,
imageinfo->proxy, NULL );
}
/* Make a basic imageinfo. No refs, will be destroyed on next GC. If name is
* NULL, make a temp name up; otherwise name needs to be unique.
*/
Imageinfo *
imageinfo_new( Imageinfogroup *imageinfogroup,
Heap *heap, IMAGE *im, const char *name )
{
Imageinfo *imageinfo =
IMAGEINFO( g_object_new( TYPE_IMAGEINFO, NULL ) );
char buf[FILENAME_MAX];
#ifdef DEBUG_OPEN
printf( "imageinfo_new: %p \"%s\"\n", imageinfo, im->filename );
#endif /*DEBUG_OPEN*/
managed_link_heap( MANAGED( imageinfo ), heap );
if( !name ) {
if( !temp_name( buf, "v" ) )
/* Will be freed on next GC.
*/
return( NULL );
name = buf;
}
iobject_set( IOBJECT( imageinfo ), name, NULL );
/* Only record the pointer when we know we will make the imageinfo
* successfully.
*/
imageinfo->im = im;
icontainer_child_add( ICONTAINER( imageinfogroup ),
ICONTAINER( imageinfo ), -1 );
imageinfo_proxy_add( imageinfo );
return( imageinfo );
}
/* An image is a result of a LUT operation on an earlier imageinfo.
*/
void
imageinfo_set_underlying( Imageinfo *top_imageinfo, Imageinfo *imageinfo )
{
g_assert( !top_imageinfo->underlying );
top_imageinfo->underlying = imageinfo;
MANAGED_REF( top_imageinfo->underlying );
}
/* Make a temp image. Deleted on close. No refs: closed on next GC. If you
* want it to stick around, ref it!
*/
Imageinfo *
imageinfo_new_temp( Imageinfogroup *imageinfogroup,
Heap *heap, const char *name, const char *mode )
{
IMAGE *im;
char tname[FILENAME_MAX];
Imageinfo *imageinfo;
if( !temp_name( tname, "v" ) || !(im = im_open( tname, mode )) )
return( NULL );
if( !(imageinfo = imageinfo_new( imageinfogroup, heap, im, name )) ) {
im_close( im );
return( NULL );
}
imageinfo->dfile = TRUE;
return( imageinfo );
}
/* Need this context during imageinfo_open_image_input().
*/
typedef struct _ImageinfoOpen {
Imageinfogroup *imageinfogroup;
Heap *heap;
const char *filename;
GtkWidget *parent;
} ImageinfoOpen;
/* Open for read ... returns a non-heap pointer, destroy if it goes in the
* heap.
*/
static Imageinfo *
imageinfo_open_image_input( const char *filename, ImageinfoOpen *open )
{
Imageinfo *imageinfo;
VipsFormatClass *format;
if( !(format = vips_format_for_file( filename )) )
return( NULL );
if( strcmp( VIPS_OBJECT_CLASS( format )->nickname, "vips" ) == 0 ) {
IMAGE *im;
if( !(im = im_open( filename, "r" )) )
return( NULL );
if( !(imageinfo = imageinfo_new( open->imageinfogroup,
open->heap, im, open->filename )) ) {
im_close( im );
return( NULL );
}
MANAGED_REF( imageinfo );
#ifdef DEBUG_OPEN
printf( "imageinfo_open_image_input: opened VIPS \"%s\"\n",
filename );
#endif /*DEBUG_OPEN*/
}
else {
VipsFormatFlags flags =
vips_format_get_flags( format, filename );
const char *mode = flags & VIPS_FORMAT_PARTIAL ? "p" : "w";
if( !(imageinfo = imageinfo_new_temp( open->imageinfogroup,
open->heap, open->filename, mode )) )
return( NULL );
MANAGED_REF( imageinfo );
if( format->load( filename, imageinfo->im ) ||
im_histlin( imageinfo->im, "im_copy %s %s",
filename, imageinfo->im->filename ) ) {
MANAGED_UNREF( imageinfo );
return( NULL );
}
#ifdef DEBUG_OPEN
printf( "imageinfo_open_image_input: opened %s \"%s\"\n",
VIPS_OBJECT_CLASS( format )->nickname, filename );
#endif /*DEBUG_OPEN*/
}
/* Get ready for input.
*/
if( im_pincheck( imageinfo->im ) )
return( NULL );
/* The rewind will have removed everything from the IMAGE. Reattach
* progress.
*/
imageinfo_proxy_add( imageinfo );
/* Attach the original filename ... pick this up again later as a
* save default.
*/
if( im_meta_set_string( imageinfo->im, ORIGINAL_FILENAME, filename ) )
return( NULL );
return( imageinfo );
}
/* Was this ii loaded from a file (ie. ->name contains a filename the user
* might recognise).
*/
gboolean
imageinfo_is_from_file( Imageinfo *imageinfo )
{
return( IOBJECT( imageinfo )->name && imageinfo->from_file );
}
static gint
imageinfo_attach_check_cb( Imageinfo *imageinfo )
{
if( imageinfo_is_from_file( imageinfo ) && imageinfo->check_tid ) {
struct stat buf;
if( !stat( IOBJECT( imageinfo )->name, &buf ) &&
buf.st_mtime != imageinfo->check_mtime ) {
imageinfo->check_mtime = buf.st_mtime;
imageinfo_file_changed( imageinfo );
}
}
return( TRUE );
}
/* Start checking this file for updates, signal reload if there is one.
*/
static void
imageinfo_attach_check( Imageinfo *imageinfo )
{
if( imageinfo_is_from_file( imageinfo ) && !imageinfo->check_tid ) {
struct stat buf;
/* Need to be able to state to be able to track a file.
*/
if( stat( IOBJECT( imageinfo )->name, &buf ) )
return;
imageinfo->mtime = buf.st_mtime;
imageinfo->check_mtime = imageinfo->mtime;
imageinfo->check_tid = g_timeout_add( 1000,
(GSourceFunc) imageinfo_attach_check_cb, imageinfo );
#ifdef DEBUG_CHECK
printf( "imageinfo_attach_check: starting to check" );
imageinfo_print( imageinfo );
#endif /*DEBUG_CHECK*/
}
else
IM_FREEF( g_source_remove, imageinfo->check_tid );
}
/* Open a filename for input. The filenmae can have an embedded mode.
*/
Imageinfo *
imageinfo_new_input( Imageinfogroup *imageinfogroup, GtkWidget *parent,
Heap *heap, const char *name )
{
Imageinfo *imageinfo;
ImageinfoOpen open;
if( (imageinfo = imageinfogroup_lookup( imageinfogroup, name )) ) {
/* We always make a new non-heap pointer.
*/
MANAGED_REF( imageinfo );
return( imageinfo );
}
open.imageinfogroup = imageinfogroup;
open.heap = heap;
open.filename = name;
open.parent = parent;
if( !(imageinfo = (Imageinfo *) callv_string_filename(
(callv_string_fn) imageinfo_open_image_input,
name, &open, NULL, NULL )) ) {
error_top( _( "Unable to open image." ) );
error_sub( _( "Unable to open file \"%s\" as image." ),
name );
error_vips();
return( NULL );
}
imageinfo->from_file = TRUE;
imageinfo_attach_check( imageinfo );
return( imageinfo );
}
/* Add an identity lut, if this is a LUTtable image.
*/
static IMAGE *
imageinfo_get_identity_lut( Imageinfo *imageinfo )
{
if( imageinfo->im->Coding == IM_CODING_NONE &&
imageinfo->im->BandFmt == IM_BANDFMT_UCHAR ) {
if( !imageinfo->identity_lut ) {
char tname[FILENAME_MAX];
IMAGE *im;
if( !temp_name( tname, "v" ) ||
!(im = im_open( tname, "p" )) )
return( NULL );