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gimp/app/core/gimpimagefile.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpimagefile.c
*
* Copyright (C) 2001-2004 Sven Neumann <sven@gimp.org>
* Michael Natterer <mitch@gimp.org>
*
* 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.
*/
#include "config.h"
#include <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpthumb/gimpthumb.h"
#include "core-types.h"
#include "config/gimpcoreconfig.h"
#include "gimp.h"
#include "gimpcontainer.h"
#include "gimpcontext.h"
#include "gimpimage.h"
#include "gimpimagefile.h"
#include "gimpmarshal.h"
#include "gimpprogress.h"
#include "file/file-open.h"
#include "file/file-utils.h"
#include "gimp-intl.h"
enum
{
INFO_CHANGED,
LAST_SIGNAL
};
static void gimp_imagefile_class_init (GimpImagefileClass *klass);
static void gimp_imagefile_init (GimpImagefile *imagefile);
static void gimp_imagefile_finalize (GObject *object);
static void gimp_imagefile_name_changed (GimpObject *object);
static void gimp_imagefile_info_changed (GimpImagefile *imagefile);
static void gimp_imagefile_notify_thumbnail (GimpImagefile *imagefile,
GParamSpec *pspec);
static GdkPixbuf * gimp_imagefile_get_new_pixbuf (GimpViewable *viewable,
gint width,
gint height);
static GdkPixbuf * gimp_imagefile_load_thumb (GimpImagefile *imagefile,
gint width,
gint height);
static gboolean gimp_imagefile_save_thumb (GimpImagefile *imagefile,
GimpImage *gimage,
gint size,
gboolean replace,
GError **error);
static gchar * gimp_imagefile_get_description (GimpViewable *viewable,
gchar **tooltip);
static void gimp_thumbnail_set_info_from_image (GimpThumbnail *thumbnail,
const gchar *mime_type,
GimpImage *image);
static void gimp_thumbnail_set_info (GimpThumbnail *thumbnail,
const gchar *mime_type,
gint width,
gint height);
static guint gimp_imagefile_signals[LAST_SIGNAL] = { 0 };
static GimpViewableClass *parent_class = NULL;
GType
gimp_imagefile_get_type (void)
{
static GType imagefile_type = 0;
if (!imagefile_type)
{
static const GTypeInfo imagefile_info =
{
sizeof (GimpImagefileClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_imagefile_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpImagefile),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_imagefile_init,
};
imagefile_type = g_type_register_static (GIMP_TYPE_VIEWABLE,
"GimpImagefile",
&imagefile_info, 0);
}
return imagefile_type;
}
static void
gimp_imagefile_class_init (GimpImagefileClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
gchar *creator;
parent_class = g_type_class_peek_parent (klass);
gimp_imagefile_signals[INFO_CHANGED] =
g_signal_new ("info_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImagefileClass, info_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_imagefile_finalize;
gimp_object_class->name_changed = gimp_imagefile_name_changed;
viewable_class->name_changed_signal = "info_changed";
viewable_class->get_new_pixbuf = gimp_imagefile_get_new_pixbuf;
viewable_class->get_description = gimp_imagefile_get_description;
g_type_class_ref (GIMP_TYPE_IMAGE_TYPE);
creator = g_strdup_printf ("gimp-%d.%d",
GIMP_MAJOR_VERSION, GIMP_MINOR_VERSION);
gimp_thumb_init (creator, NULL);
g_free (creator);
}
static void
gimp_imagefile_init (GimpImagefile *imagefile)
{
imagefile->gimp = NULL;
imagefile->thumbnail = gimp_thumbnail_new ();
imagefile->description = NULL;
g_signal_connect_object (imagefile->thumbnail, "notify",
G_CALLBACK (gimp_imagefile_notify_thumbnail),
imagefile, G_CONNECT_SWAPPED);
}
static void
gimp_imagefile_finalize (GObject *object)
{
GimpImagefile *imagefile = GIMP_IMAGEFILE (object);
if (imagefile->description)
{
if (! imagefile->static_desc)
g_free (imagefile->description);
imagefile->description = NULL;
}
if (imagefile->thumbnail)
{
g_object_unref (imagefile->thumbnail);
imagefile->thumbnail = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GimpImagefile *
gimp_imagefile_new (Gimp *gimp,
const gchar *uri)
{
GimpImagefile *imagefile;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
imagefile = g_object_new (GIMP_TYPE_IMAGEFILE, NULL);
imagefile->gimp = gimp;
if (uri)
gimp_object_set_name (GIMP_OBJECT (imagefile), uri);
return imagefile;
}
void
gimp_imagefile_update (GimpImagefile *imagefile)
{
gchar *uri;
g_return_if_fail (GIMP_IS_IMAGEFILE (imagefile));
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (imagefile));
g_object_get (imagefile->thumbnail,
"image-uri", &uri,
NULL);
if (uri)
{
GimpImagefile *documents_imagefile = (GimpImagefile *)
gimp_container_get_child_by_name (imagefile->gimp->documents, uri);
if (documents_imagefile != imagefile &&
GIMP_IS_IMAGEFILE (documents_imagefile))
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (documents_imagefile));
g_free (uri);
}
}
void
gimp_imagefile_create_thumbnail (GimpImagefile *imagefile,
GimpContext *context,
GimpProgress *progress,
gint size,
gboolean replace)
{
GimpThumbnail *thumbnail;
GimpThumbState image_state;
g_return_if_fail (GIMP_IS_IMAGEFILE (imagefile));
g_return_if_fail (GIMP_IS_CONTEXT (context));
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
if (! imagefile->gimp->config->layer_previews)
return;
if (size < 1)
return;
thumbnail = imagefile->thumbnail;
gimp_thumbnail_set_uri (thumbnail,
gimp_object_get_name (GIMP_OBJECT (imagefile)));
image_state = gimp_thumbnail_peek_image (thumbnail);
if (image_state == GIMP_THUMB_STATE_REMOTE ||
image_state >= GIMP_THUMB_STATE_EXISTS)
{
GimpImage *image;
gboolean success;
gint width = 0;
gint height = 0;
const gchar *mime_type = NULL;
GError *error = NULL;
g_object_ref (imagefile);
image = file_open_thumbnail (imagefile->gimp, context, progress,
thumbnail->image_uri, size,
&mime_type, &width, &height);
if (image)
{
gimp_thumbnail_set_info (imagefile->thumbnail,
mime_type, width, height);
}
else
{
GimpPDBStatusType status;
image = file_open_image (imagefile->gimp, context, progress,
thumbnail->image_uri, thumbnail->image_uri,
NULL, GIMP_RUN_NONINTERACTIVE,
&status, &mime_type, NULL);
if (image)
gimp_thumbnail_set_info_from_image (imagefile->thumbnail,
mime_type, image);
}
if (image)
{
success = gimp_imagefile_save_thumb (imagefile,
image, size, replace,
&error);
g_object_unref (image);
}
else
{
success = gimp_thumbnail_save_failure (thumbnail,
"The GIMP " GIMP_VERSION,
&error);
gimp_imagefile_update (imagefile);
}
g_object_unref (imagefile);
if (! success)
{
g_message (error->message);
g_error_free (error);
}
}
}
/* The weak version doesn't ref the imagefile but deals gracefully
* with an imagefile that is destroyed while the thumbnail is
* created. Thia allows to use this function w/o the need to block
* the user interface.
*/
void
gimp_imagefile_create_thumbnail_weak (GimpImagefile *imagefile,
GimpContext *context,
GimpProgress *progress,
gint size,
gboolean replace)
{
GimpImagefile *local;
const gchar *uri;
g_return_if_fail (GIMP_IS_IMAGEFILE (imagefile));
if (! imagefile->gimp->config->layer_previews)
return;
if (size < 1)
return;
uri = gimp_object_get_name (GIMP_OBJECT (imagefile));
if (!uri)
return;
local = gimp_imagefile_new (imagefile->gimp, uri);
g_object_add_weak_pointer (G_OBJECT (imagefile), (gpointer) &imagefile);
gimp_imagefile_create_thumbnail (local, context, progress, size, replace);
if (imagefile)
{
uri = gimp_object_get_name (GIMP_OBJECT (imagefile));
if (uri &&
strcmp (uri, gimp_object_get_name (GIMP_OBJECT (local))) == 0)
{
gimp_imagefile_update (imagefile);
}
g_object_remove_weak_pointer (G_OBJECT (imagefile),
(gpointer) &imagefile);
}
g_object_unref (local);
}
gboolean
gimp_imagefile_check_thumbnail (GimpImagefile *imagefile)
{
gint size;
g_return_val_if_fail (GIMP_IS_IMAGEFILE (imagefile), FALSE);
size = imagefile->gimp->config->thumbnail_size;
if (size > 0)
{
GimpThumbState state;
state = gimp_thumbnail_check_thumb (imagefile->thumbnail, size);
return (state == GIMP_THUMB_STATE_OK);
}
return TRUE;
}
gboolean
gimp_imagefile_save_thumbnail (GimpImagefile *imagefile,
const gchar *mime_type,
GimpImage *gimage)
{
gint size;
gboolean success = TRUE;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_IMAGEFILE (imagefile), FALSE);
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
size = imagefile->gimp->config->thumbnail_size;
if (size > 0)
{
gimp_thumbnail_set_info_from_image (imagefile->thumbnail,
mime_type, gimage);
success = gimp_imagefile_save_thumb (imagefile,
gimage, size, FALSE,
&error);
if (! success)
{
g_message (error->message);
g_error_free (error);
}
}
return success;
}
static void
gimp_imagefile_name_changed (GimpObject *object)
{
GimpImagefile *imagefile = GIMP_IMAGEFILE (object);
if (GIMP_OBJECT_CLASS (parent_class)->name_changed)
GIMP_OBJECT_CLASS (parent_class)->name_changed (object);
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), NULL);
gimp_thumbnail_set_uri (imagefile->thumbnail, gimp_object_get_name (object));
}
static void
gimp_imagefile_info_changed (GimpImagefile *imagefile)
{
if (imagefile->description)
{
if (! imagefile->static_desc)
g_free (imagefile->description);
imagefile->description = NULL;
}
g_signal_emit (imagefile, gimp_imagefile_signals[INFO_CHANGED], 0);
}
static void
gimp_imagefile_notify_thumbnail (GimpImagefile *imagefile,
GParamSpec *pspec)
{
if (strcmp (pspec->name, "image-state") == 0 ||
strcmp (pspec->name, "thumb-state") == 0)
{
gimp_imagefile_info_changed (imagefile);
}
}
static GdkPixbuf *
gimp_imagefile_get_new_pixbuf (GimpViewable *viewable,
gint width,
gint height)
{
GimpImagefile *imagefile = GIMP_IMAGEFILE (viewable);
GdkPixbuf *pixbuf;
if (! GIMP_OBJECT (imagefile)->name)
return NULL;
pixbuf = gimp_imagefile_load_thumb (imagefile, width, height);
if (pixbuf)
{
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), NULL);
}
else if (imagefile->thumbnail->image_state == GIMP_THUMB_STATE_REMOTE)
{
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), "gtk-network");
}
else if (imagefile->thumbnail->image_state == GIMP_THUMB_STATE_FOLDER)
{
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), "gtk-open");
}
else if (imagefile->thumbnail->image_state == GIMP_THUMB_STATE_SPECIAL)
{
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), "gtk-harddisk");
}
else
{
gimp_viewable_set_stock_id (GIMP_VIEWABLE (imagefile), NULL);
}
return pixbuf;
}
static gchar *
gimp_imagefile_get_description (GimpViewable *viewable,
gchar **tooltip)
{
GimpImagefile *imagefile = GIMP_IMAGEFILE (viewable);
GimpThumbnail *thumbnail = imagefile->thumbnail;
gchar *basename;
if (! thumbnail->image_uri)
return NULL;
if (tooltip)
{
gchar *filename;
const gchar *desc;
filename = file_utils_uri_to_utf8_filename (thumbnail->image_uri);
desc = gimp_imagefile_get_desc_string (imagefile);
if (desc)
{
*tooltip = g_strdup_printf ("%s\n%s", filename, desc);
g_free (filename);
}
else
{
*tooltip = filename;
}
}
basename = file_utils_uri_to_utf8_basename (thumbnail->image_uri);
if (thumbnail->image_width > 0 && thumbnail->image_height > 0)
{
gchar *tmp = basename;
basename = g_strdup_printf ("%s (%d x %d)",
tmp,
thumbnail->image_width,
thumbnail->image_height);
g_free (tmp);
}
return basename;
}
const gchar *
gimp_imagefile_get_desc_string (GimpImagefile *imagefile)
{
GimpThumbnail *thumbnail;
g_return_val_if_fail (GIMP_IS_IMAGEFILE (imagefile), NULL);
if (imagefile->description)
return (const gchar *) imagefile->description;
thumbnail = imagefile->thumbnail;
switch (thumbnail->image_state)
{
case GIMP_THUMB_STATE_UNKNOWN:
imagefile->description = NULL;
imagefile->static_desc = TRUE;
break;
case GIMP_THUMB_STATE_FOLDER:
imagefile->description = _("Folder");
imagefile->static_desc = TRUE;
break;
case GIMP_THUMB_STATE_SPECIAL:
imagefile->description = _("Special File");
imagefile->static_desc = TRUE;
break;
case GIMP_THUMB_STATE_NOT_FOUND:
imagefile->description =
(gchar *) g_strerror (thumbnail->image_not_found_errno);
imagefile->static_desc = TRUE;
break;
default:
{
GString *str = g_string_new (NULL);
if (thumbnail->image_state == GIMP_THUMB_STATE_REMOTE)
{
g_string_append (str, _("Remote File"));
g_string_append_c (str, '\n');
}
if (thumbnail->image_filesize > 0)
{
gchar *size = gimp_memsize_to_string (thumbnail->image_filesize);
g_string_append (str, size);
g_free (size);
g_string_append_c (str, '\n');
}
switch (thumbnail->thumb_state)
{
case GIMP_THUMB_STATE_NOT_FOUND:
g_string_append (str, _("Click to create preview"));
break;
case GIMP_THUMB_STATE_EXISTS:
g_string_append (str, _("Loading preview ..."));
break;
case GIMP_THUMB_STATE_OLD:
g_string_append (str, _("Preview is out of date"));
break;
case GIMP_THUMB_STATE_FAILED:
g_string_append (str, _("Cannot create preview"));
break;
case GIMP_THUMB_STATE_OK:
{
if (thumbnail->image_state == GIMP_THUMB_STATE_REMOTE)
{
g_string_append (str, _("(Preview may be out of date)"));
g_string_append_c (str, '\n');
}
if (thumbnail->image_width > 0 && thumbnail->image_height > 0)
{
g_string_append_printf (str, _("%d x %d pixels"),
thumbnail->image_width,
thumbnail->image_height);
g_string_append_c (str, '\n');
}
if (thumbnail->image_type)
g_string_append (str, gettext (thumbnail->image_type));
if (thumbnail->image_num_layers > 0)
{
if (thumbnail->image_type)
g_string_append_len (str, ", ", 2);
if (thumbnail->image_num_layers == 1)
g_string_append (str, _("1 Layer"));
else
g_string_append_printf (str, _("%d Layers"),
thumbnail->image_num_layers);
}
}
break;
default:
break;
}
imagefile->description = g_string_free (str, FALSE);
imagefile->static_desc = FALSE;
}
}
return (const gchar *) imagefile->description;
}
static GdkPixbuf *
gimp_imagefile_load_thumb (GimpImagefile *imagefile,
gint width,
gint height)
{
GimpThumbnail *thumbnail = imagefile->thumbnail;
GdkPixbuf *pixbuf = NULL;
GError *error = NULL;
gint size = MAX (width, height);
gint pixbuf_width;
gint pixbuf_height;
gint preview_width;
gint preview_height;
if (gimp_thumbnail_peek_thumb (thumbnail, size) < GIMP_THUMB_STATE_EXISTS)
return NULL;
pixbuf = gimp_thumbnail_load_thumb (thumbnail, size, &error);
if (! pixbuf)
{
if (error)
{
g_message (_("Could not open thumbnail '%s': %s"),
thumbnail->thumb_filename, error->message);
g_error_free (error);
}
return NULL;
}
pixbuf_width = gdk_pixbuf_get_width (pixbuf);
pixbuf_height = gdk_pixbuf_get_height (pixbuf);
gimp_viewable_calc_preview_size (pixbuf_width,
pixbuf_height,
width,
height,
TRUE, 1.0, 1.0,
&preview_width,
&preview_height,
NULL);
if (preview_width < pixbuf_width || preview_height < pixbuf_height)
{
GdkPixbuf *scaled = gdk_pixbuf_scale_simple (pixbuf,
preview_width,
preview_height,
GDK_INTERP_BILINEAR);
g_object_unref (pixbuf);
pixbuf = scaled;
pixbuf_width = preview_width;
pixbuf_height = preview_height;
}
if (gdk_pixbuf_get_n_channels (pixbuf) != 3)
{
GdkPixbuf *tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
pixbuf_width, pixbuf_height);
gdk_pixbuf_composite_color (pixbuf, tmp,
0, 0, pixbuf_width, pixbuf_height,
0.0, 0.0, 1.0, 1.0,
GDK_INTERP_NEAREST, 255,
0, 0, GIMP_CHECK_SIZE_SM,
0x66666666, 0x99999999);
g_object_unref (pixbuf);
pixbuf = tmp;
}
return pixbuf;
}
static gboolean
gimp_imagefile_save_thumb (GimpImagefile *imagefile,
GimpImage *gimage,
gint size,
gboolean replace,
GError **error)
{
GimpThumbnail *thumbnail = imagefile->thumbnail;
GdkPixbuf *pixbuf;
gint width, height;
gboolean success = FALSE;
if (size < 1)
return TRUE;
if (gimage->width <= size && gimage->height <= size)
{
width = gimage->width;
height = gimage->height;
size = MAX (width, height);
}
else
{
if (gimage->width < gimage->height)
{
height = size;
width = MAX (1, (size * gimage->width) / gimage->height);
}
else
{
width = size;
height = MAX (1, (size * gimage->height) / gimage->width);
}
}
pixbuf = gimp_viewable_get_new_pixbuf (GIMP_VIEWABLE (gimage), width, height);
/* when layer previews are disabled, we won't get a pixbuf */
if (! pixbuf)
return TRUE;
success = gimp_thumbnail_save_thumb (thumbnail,
pixbuf,
"The GIMP " GIMP_VERSION,
error);
g_object_unref (pixbuf);
if (success)
{
if (replace)
gimp_thumbnail_delete_others (thumbnail, size);
else
gimp_thumbnail_delete_failure (thumbnail);
gimp_imagefile_update (imagefile);
}
return success;
}
static void
gimp_thumbnail_set_info_from_image (GimpThumbnail *thumbnail,
const gchar *mime_type,
GimpImage *image)
{
GimpEnumDesc *desc;
GimpImageType type;
/* peek the thumbnail to make sure that mtime and filesize are set */
gimp_thumbnail_peek_image (thumbnail);
type = GIMP_IMAGE_TYPE_FROM_BASE_TYPE (gimp_image_base_type (image));
if (gimp_image_has_alpha (image))
type = GIMP_IMAGE_TYPE_WITH_ALPHA (type);
desc = gimp_enum_get_desc (g_type_class_peek (GIMP_TYPE_IMAGE_TYPE), type);
g_object_set (thumbnail,
"image-mimetype", mime_type,
"image-width", gimp_image_get_width (image),
"image-height", gimp_image_get_height (image),
"image-type", desc->value_desc,
"image-num-layers", gimp_container_num_children (image->layers),
NULL);
}
static void
gimp_thumbnail_set_info (GimpThumbnail *thumbnail,
const gchar *mime_type,
gint width,
gint height)
{
/* peek the thumbnail to make sure that mtime and filesize are set */
gimp_thumbnail_peek_image (thumbnail);
g_object_set (thumbnail,
"image-mimetype", mime_type,
"image-width", width,
"image-height", height,
"image-type", NULL,
"image-num-layers", NULL,
NULL);
}
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