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d6c578c56784ca14872f9d42ef30a13b51f072bc
gimp/libgimp/gimpexport.c
Michael Natterer 8005eea835 Remove the "GIMP" from all "Since: GIMP 2.x" API doc comments 
because it confuses gtk-doc and breaks some links. Also change the
"Index of new symbols in GIMP 2.x" sections to be what seems to be the
modern standard (looked at the GLib and GTK+ docs), and update some
other stuff.
2015-05-31 21:18:09 +02:00

1046 lines
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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpexport.c
* Copyright (C) 1999-2004 Sven Neumann <sven@gimp.org>
*
* This library 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 3 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gimp.h"
#include "gimpui.h"
#include "libgimp-intl.h"
/**
* SECTION: gimpexport
* @title: gimpexport
* @short_description: Export an image before it is saved.
*
* This function should be called by all save_plugins unless they are
* able to save all image formats GIMP knows about. It takes care of
* asking the user if she wishes to export the image to a format the
* save_plugin can handle. It then performs the necessary conversions
* (e.g. Flatten) on a copy of the image so that the image can be
* saved without changing the original image.
*
* The capabilities of the save_plugin are specified by combining
* #GimpExportCapabilities using a bitwise OR.
*
* Make sure you have initialized GTK+ before you call this function
* as it will most probably have to open a dialog.
**/
typedef void (* ExportFunc) (gint32 imageID,
gint32 *drawable_ID);
/* the export action structure */
typedef struct
{
ExportFunc default_action;
ExportFunc alt_action;
const gchar *reason;
const gchar *possibilities[2];
gint choice;
} ExportAction;
/* the functions that do the actual export */
static void
export_merge (gint32 image_ID,
gint32 *drawable_ID)
{
gint32 nlayers;
gint32 nvisible = 0;
gint32 i;
gint32 *layers;
gint32 merged;
gint32 transp;
layers = gimp_image_get_layers (image_ID, &nlayers);
for (i = 0; i < nlayers; i++)
{
if (gimp_item_get_visible (layers[i]))
nvisible++;
}
if (nvisible <= 1)
{
/* if there is only one (or zero) visible layer, add a new transparent
layer that has the same size as the canvas. The merge that follows
will ensure that the offset, opacity and size are correct */
transp = gimp_layer_new (image_ID, "-",
gimp_image_width (image_ID),
gimp_image_height (image_ID),
gimp_drawable_type (*drawable_ID) | 1,
100.0, GIMP_NORMAL_MODE);
gimp_image_insert_layer (image_ID, transp, -1, 1);
gimp_selection_none (image_ID);
gimp_edit_clear (transp);
nvisible++;
}
if (nvisible > 1)
{
g_free (layers);
merged = gimp_image_merge_visible_layers (image_ID, GIMP_CLIP_TO_IMAGE);
if (merged != -1)
*drawable_ID = merged;
else
return; /* shouldn't happen */
layers = gimp_image_get_layers (image_ID, &nlayers);
/* make sure that the merged drawable matches the image size */
if (gimp_drawable_width (merged) != gimp_image_width (image_ID) ||
gimp_drawable_height (merged) != gimp_image_height (image_ID))
{
gint off_x, off_y;
gimp_drawable_offsets (merged, &off_x, &off_y);
gimp_layer_resize (merged,
gimp_image_width (image_ID),
gimp_image_height (image_ID),
off_x, off_y);
}
}
/* remove any remaining (invisible) layers */
for (i = 0; i < nlayers; i++)
{
if (layers[i] != *drawable_ID)
gimp_image_remove_layer (image_ID, layers[i]);
}
g_free (layers);
}
static void
export_flatten (gint32 image_ID,
gint32 *drawable_ID)
{
gint32 flattened;
flattened = gimp_image_flatten (image_ID);
if (flattened != -1)
*drawable_ID = flattened;
}
static void
export_apply_masks (gint32 image_ID,
gint *drawable_ID)
{
gint32 n_layers;
gint32 *layers;
gint i;
layers = gimp_image_get_layers (image_ID, &n_layers);
for (i = 0; i < n_layers; i++)
{
if (gimp_layer_get_mask (layers[i]) != -1)
gimp_layer_remove_mask (layers[i], GIMP_MASK_APPLY);
}
g_free (layers);
}
static void
export_convert_rgb (gint32 image_ID,
gint32 *drawable_ID)
{
gimp_image_convert_rgb (image_ID);
}
static void
export_convert_grayscale (gint32 image_ID,
gint32 *drawable_ID)
{
gimp_image_convert_grayscale (image_ID);
}
static void
export_convert_indexed (gint32 image_ID,
gint32 *drawable_ID)
{
gint32 nlayers;
/* check alpha */
g_free (gimp_image_get_layers (image_ID, &nlayers));
if (nlayers > 1 || gimp_drawable_has_alpha (*drawable_ID))
gimp_image_convert_indexed (image_ID, GIMP_NO_DITHER,
GIMP_MAKE_PALETTE, 255, FALSE, FALSE, "");
else
gimp_image_convert_indexed (image_ID, GIMP_NO_DITHER,
GIMP_MAKE_PALETTE, 256, FALSE, FALSE, "");
}
static void
export_convert_bitmap (gint32 image_ID,
gint32 *drawable_ID)
{
if (gimp_image_base_type (image_ID) == GIMP_INDEXED)
gimp_image_convert_rgb (image_ID);
gimp_image_convert_indexed (image_ID, GIMP_FS_DITHER,
GIMP_MAKE_PALETTE, 2, FALSE, FALSE, "");
}
static void
export_add_alpha (gint32 image_ID,
gint32 *drawable_ID)
{
gint32 nlayers;
gint32 i;
gint32 *layers;
layers = gimp_image_get_layers (image_ID, &nlayers);
for (i = 0; i < nlayers; i++)
{
if (!gimp_drawable_has_alpha (layers[i]))
gimp_layer_add_alpha (layers[i]);
}
g_free (layers);
}
static void
export_void (gint32 image_ID,
gint32 *drawable_ID)
{
/* do nothing */
}
/* a set of predefined actions */
static ExportAction export_action_merge =
{
export_merge,
NULL,
N_("%s plug-in can't handle layers"),
{ N_("Merge Visible Layers"), NULL },
0
};
static ExportAction export_action_merge_single =
{
export_merge,
NULL,
N_("%s plug-in can't handle layer offsets, size or opacity"),
{ N_("Merge Visible Layers"), NULL },
0
};
static ExportAction export_action_animate_or_merge =
{
export_merge,
NULL,
N_("%s plug-in can only handle layers as animation frames"),
{ N_("Merge Visible Layers"), N_("Save as Animation")},
0
};
static ExportAction export_action_animate_or_flatten =
{
export_flatten,
NULL,
N_("%s plug-in can only handle layers as animation frames"),
{ N_("Flatten Image"), N_("Save as Animation") },
0
};
static ExportAction export_action_merge_or_flatten =
{
export_flatten,
export_merge,
N_("%s plug-in can't handle layers"),
{ N_("Flatten Image"), N_("Merge Visible Layers") },
1
};
static ExportAction export_action_flatten =
{
export_flatten,
NULL,
N_("%s plug-in can't handle transparency"),
{ N_("Flatten Image"), NULL },
0
};
static ExportAction export_action_apply_masks =
{
export_apply_masks,
NULL,
N_("%s plug-in can't handle layer masks"),
{ N_("Apply Layer Masks"), NULL },
0
};
static ExportAction export_action_convert_rgb =
{
export_convert_rgb,
NULL,
N_("%s plug-in can only handle RGB images"),
{ N_("Convert to RGB"), NULL },
0
};
static ExportAction export_action_convert_grayscale =
{
export_convert_grayscale,
NULL,
N_("%s plug-in can only handle grayscale images"),
{ N_("Convert to Grayscale"), NULL },
0
};
static ExportAction export_action_convert_indexed =
{
export_convert_indexed,
NULL,
N_("%s plug-in can only handle indexed images"),
{ N_("Convert to Indexed using default settings\n"
"(Do it manually to tune the result)"), NULL },
0
};
static ExportAction export_action_convert_bitmap =
{
export_convert_bitmap,
NULL,
N_("%s plug-in can only handle bitmap (two color) indexed images"),
{ N_("Convert to Indexed using bitmap default settings\n"
"(Do it manually to tune the result)"), NULL },
0
};
static ExportAction export_action_convert_rgb_or_grayscale =
{
export_convert_rgb,
export_convert_grayscale,
N_("%s plug-in can only handle RGB or grayscale images"),
{ N_("Convert to RGB"), N_("Convert to Grayscale")},
0
};
static ExportAction export_action_convert_rgb_or_indexed =
{
export_convert_rgb,
export_convert_indexed,
N_("%s plug-in can only handle RGB or indexed images"),
{ N_("Convert to RGB"), N_("Convert to Indexed using default settings\n"
"(Do it manually to tune the result)")},
0
};
static ExportAction export_action_convert_indexed_or_grayscale =
{
export_convert_indexed,
export_convert_grayscale,
N_("%s plug-in can only handle grayscale or indexed images"),
{ N_("Convert to Indexed using default settings\n"
"(Do it manually to tune the result)"),
N_("Convert to Grayscale") },
0
};
static ExportAction export_action_add_alpha =
{
export_add_alpha,
NULL,
N_("%s plug-in needs an alpha channel"),
{ N_("Add Alpha Channel"), NULL},
0
};
static ExportFunc
export_action_get_func (const ExportAction *action)
{
if (action->choice == 0 && action->default_action)
return action->default_action;
if (action->choice == 1 && action->alt_action)
return action->alt_action;
return export_void;
}
static void
export_action_perform (const ExportAction *action,
gint32 image_ID,
gint32 *drawable_ID)
{
export_action_get_func (action) (image_ID, drawable_ID);
}
/* dialog functions */
static void
export_toggle_callback (GtkWidget *widget,
gpointer data)
{
gint *choice = (gint *) data;
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
*choice = FALSE;
else
*choice = TRUE;
}
static GimpExportReturn
confirm_save_dialog (const gchar *message,
const gchar *format_name)
{
GtkWidget *dialog;
GtkWidget *hbox;
GtkWidget *image;
GtkWidget *main_vbox;
GtkWidget *label;
gchar *text;
GimpExportReturn retval;
g_return_val_if_fail (message != NULL, GIMP_EXPORT_CANCEL);
g_return_val_if_fail (format_name != NULL, GIMP_EXPORT_CANCEL);
dialog = gimp_dialog_new (_("Confirm Save"), "gimp-export-image-confirm",
NULL, 0,
gimp_standard_help_func,
"gimp-export-confirm-dialog",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
_("Confirm"), GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
gimp_window_set_transient (GTK_WINDOW (dialog));
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
hbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_widget_show (hbox);
image = gtk_image_new_from_icon_name ("dialog-warning",
GTK_ICON_SIZE_DIALOG);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 0);
gtk_widget_show (image);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (hbox), main_vbox, FALSE, FALSE, 0);
gtk_widget_show (main_vbox);
text = g_strdup_printf (message, format_name);
label = gtk_label_new (text);
g_free (text);
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_SCALE, PANGO_SCALE_LARGE,
PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
-1);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.0);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_box_pack_start (GTK_BOX (main_vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_show (dialog);
switch (gimp_dialog_run (GIMP_DIALOG (dialog)))
{
case GTK_RESPONSE_OK:
retval = GIMP_EXPORT_EXPORT;
break;
default:
retval = GIMP_EXPORT_CANCEL;
break;
}
gtk_widget_destroy (dialog);
return retval;
}
static GimpExportReturn
export_dialog (GSList *actions,
const gchar *format_name)
{
GtkWidget *dialog;
GtkWidget *hbox;
GtkWidget *image;
GtkWidget *main_vbox;
GtkWidget *label;
GSList *list;
gchar *text;
GimpExportReturn retval;
g_return_val_if_fail (actions != NULL, GIMP_EXPORT_CANCEL);
g_return_val_if_fail (format_name != NULL, GIMP_EXPORT_CANCEL);
dialog = gimp_dialog_new (_("Export File"), "gimp-export-image",
NULL, 0,
gimp_standard_help_func, "gimp-export-dialog",
_("_Ignore"), GTK_RESPONSE_NO,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
_("_Export"), GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_NO,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
gimp_window_set_transient (GTK_WINDOW (dialog));
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
hbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_widget_show (hbox);
image = gtk_image_new_from_icon_name ("dialog-information",
GTK_ICON_SIZE_DIALOG);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 0);
gtk_widget_show (image);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (hbox), main_vbox, FALSE, FALSE, 0);
gtk_widget_show (main_vbox);
/* the headline */
text = g_strdup_printf (_("Your image should be exported before it "
"can be saved as %s for the following reasons:"),
format_name);
label = gtk_label_new (text);
g_free (text);
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_SCALE, PANGO_SCALE_LARGE,
-1);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.0);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_box_pack_start (GTK_BOX (main_vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
for (list = actions; list; list = g_slist_next (list))
{
ExportAction *action = list->data;
GtkWidget *frame;
GtkWidget *vbox;
text = g_strdup_printf (gettext (action->reason), format_name);
frame = gimp_frame_new (text);
g_free (text);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
if (action->possibilities[0] && action->possibilities[1])
{
GtkWidget *button;
GSList *radio_group = NULL;
button = gtk_radio_button_new_with_label (radio_group,
gettext (action->possibilities[0]));
gtk_label_set_justify (GTK_LABEL (gtk_bin_get_child (GTK_BIN (button))),
GTK_JUSTIFY_LEFT);
radio_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect (button, "toggled",
G_CALLBACK (export_toggle_callback),
&action->choice);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
(action->choice == 0));
gtk_widget_show (button);
button = gtk_radio_button_new_with_label (radio_group,
gettext (action->possibilities[1]));
gtk_label_set_justify (GTK_LABEL (gtk_bin_get_child (GTK_BIN (button))),
GTK_JUSTIFY_LEFT);
radio_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
(action->choice == 1));
gtk_widget_show (button);
}
else if (action->possibilities[0])
{
label = gtk_label_new (gettext (action->possibilities[0]));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.0);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
action->choice = 0;
}
gtk_widget_show (vbox);
}
/* the footline */
label = gtk_label_new (_("The export conversion won't modify your "
"original image."));
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.0);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_box_pack_start (GTK_BOX (main_vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_show (dialog);
switch (gimp_dialog_run (GIMP_DIALOG (dialog)))
{
case GTK_RESPONSE_OK:
retval = GIMP_EXPORT_EXPORT;
break;
case GTK_RESPONSE_NO:
retval = GIMP_EXPORT_IGNORE;
break;
default:
retval = GIMP_EXPORT_CANCEL;
break;
}
gtk_widget_destroy (dialog);
return retval;
}
/**
* gimp_export_image:
* @image_ID: Pointer to the image_ID.
* @drawable_ID: Pointer to the drawable_ID.
* @format_name: The (short) name of the image_format (e.g. JPEG or GIF).
* @capabilities: What can the image_format do?
*
* Takes an image and a drawable to be saved together with a
* description of the capabilities of the image_format. If the
* type of image doesn't match the capabilities of the format
* a dialog is opened that informs the user that the image has
* to be exported and offers to do the necessary conversions.
*
* If the user chooses to export the image, a copy is created.
* This copy is then converted, the image_ID and drawable_ID
* are changed to point to the new image and the procedure returns
* GIMP_EXPORT_EXPORT. The save_plugin has to take care of deleting the
* created image using gimp_image_delete() when it has saved it.
*
* If the user chooses to Ignore the export problem, the image_ID
* and drawable_ID is not altered, GIMP_EXPORT_IGNORE is returned and
* the save_plugin should try to save the original image. If the
* user chooses Cancel, GIMP_EXPORT_CANCEL is returned and the
* save_plugin should quit itself with status %GIMP_PDB_CANCEL.
*
* If @format_name is NULL, no dialogs will be shown and this function
* will behave as if the user clicked on the 'Export' button, if a
* dialog would have been shown.
*
* Returns: An enum of #GimpExportReturn describing the user_action.
**/
GimpExportReturn
gimp_export_image (gint32 *image_ID,
gint32 *drawable_ID,
const gchar *format_name,
GimpExportCapabilities capabilities)
{
GSList *actions = NULL;
GimpImageBaseType type;
gint32 i;
gint32 n_layers;
gint32 *layers;
gboolean interactive = FALSE;
gboolean added_flatten = FALSE;
gboolean has_layer_masks = FALSE;
gboolean background_has_alpha = TRUE;
GimpExportReturn retval = GIMP_EXPORT_CANCEL;
g_return_val_if_fail (*image_ID > -1 && *drawable_ID > -1, FALSE);
/* do some sanity checks */
if (capabilities & GIMP_EXPORT_NEEDS_ALPHA)
capabilities |= GIMP_EXPORT_CAN_HANDLE_ALPHA;
if (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS_AS_ANIMATION)
capabilities |= GIMP_EXPORT_CAN_HANDLE_LAYERS;
if (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYER_MASKS)
capabilities |= GIMP_EXPORT_CAN_HANDLE_LAYERS;
if (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS)
capabilities |= GIMP_EXPORT_CAN_HANDLE_ALPHA;
if (format_name && g_getenv ("GIMP_INTERACTIVE_EXPORT"))
interactive = TRUE;
/* ask for confirmation if the user is not saving a layer (see bug #51114) */
if (interactive &&
! gimp_item_is_layer (*drawable_ID) &&
! (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS))
{
if (gimp_item_is_layer_mask (*drawable_ID))
{
retval = confirm_save_dialog
(_("You are about to save a layer mask as %s.\n"
"This will not save the visible layers."), format_name);
}
else if (gimp_item_is_channel (*drawable_ID))
{
retval = confirm_save_dialog
(_("You are about to save a channel (saved selection) as %s.\n"
"This will not save the visible layers."), format_name);
}
else
{
/* this should not happen */
g_warning ("%s: unknown drawable type!", G_STRFUNC);
}
/* cancel - the user can then select an appropriate layer to save */
if (retval == GIMP_EXPORT_CANCEL)
return GIMP_EXPORT_CANCEL;
}
/* check alpha and layer masks */
layers = gimp_image_get_layers (*image_ID, &n_layers);
for (i = 0; i < n_layers; i++)
{
if (gimp_drawable_has_alpha (layers[i]))
{
if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_ALPHA))
{
actions = g_slist_prepend (actions, &export_action_flatten);
added_flatten = TRUE;
break;
}
}
else
{
/* If this is the last layer, it's visible and has no alpha
* channel, then the image has a "flat" background
*/
if (i == n_layers - 1 && gimp_item_get_visible (layers[i]))
background_has_alpha = FALSE;
if (capabilities & GIMP_EXPORT_NEEDS_ALPHA)
{
actions = g_slist_prepend (actions, &export_action_add_alpha);
break;
}
}
}
if (! added_flatten)
{
for (i = 0; i < n_layers; i++)
{
if (gimp_layer_get_mask (layers[i]) != -1)
has_layer_masks = TRUE;
}
}
if (! added_flatten)
{
gint32 n_children;
gint32 *children;
children = gimp_item_get_children (layers[0], &n_children);
/* check if layer size != canvas size, opacity != 100%, or offsets != 0 */
if (n_layers == 1 &&
! children &&
gimp_item_is_layer (*drawable_ID) &&
! (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS))
{
gint offset_x;
gint offset_y;
gimp_drawable_offsets (*drawable_ID, &offset_x, &offset_y);
if ((gimp_layer_get_opacity (*drawable_ID) < 100.0) ||
(gimp_image_width (*image_ID) !=
gimp_drawable_width (*drawable_ID)) ||
(gimp_image_height (*image_ID) !=
gimp_drawable_height (*drawable_ID)) ||
offset_x || offset_y)
{
if (capabilities & GIMP_EXPORT_CAN_HANDLE_ALPHA)
{
actions = g_slist_prepend (actions,
&export_action_merge_single);
}
else
{
actions = g_slist_prepend (actions,
&export_action_flatten);
}
}
}
/* check multiple layers */
else if (n_layers > 1)
{
if (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS_AS_ANIMATION)
{
if (background_has_alpha ||
capabilities & GIMP_EXPORT_NEEDS_ALPHA)
actions = g_slist_prepend (actions,
&export_action_animate_or_merge);
else
actions = g_slist_prepend (actions,
&export_action_animate_or_flatten);
}
else if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS))
{
if (capabilities & GIMP_EXPORT_NEEDS_ALPHA)
actions = g_slist_prepend (actions,
&export_action_merge);
else
actions = g_slist_prepend (actions,
&export_action_merge_or_flatten);
}
}
/* check for a single toplevel layer group */
else if (children)
{
if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYERS))
{
if (capabilities & GIMP_EXPORT_NEEDS_ALPHA)
actions = g_slist_prepend (actions,
&export_action_merge);
else
actions = g_slist_prepend (actions,
&export_action_merge_or_flatten);
}
}
g_free (children);
/* check layer masks */
if (has_layer_masks &&
! (capabilities & GIMP_EXPORT_CAN_HANDLE_LAYER_MASKS))
actions = g_slist_prepend (actions, &export_action_apply_masks);
}
g_free (layers);
/* check the image type */
type = gimp_image_base_type (*image_ID);
switch (type)
{
case GIMP_RGB:
if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_RGB))
{
if ((capabilities & GIMP_EXPORT_CAN_HANDLE_INDEXED) &&
(capabilities & GIMP_EXPORT_CAN_HANDLE_GRAY))
actions = g_slist_prepend (actions,
&export_action_convert_indexed_or_grayscale);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_INDEXED)
actions = g_slist_prepend (actions,
&export_action_convert_indexed);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_GRAY)
actions = g_slist_prepend (actions,
&export_action_convert_grayscale);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_BITMAP)
actions = g_slist_prepend (actions,
&export_action_convert_bitmap);
}
break;
case GIMP_GRAY:
if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_GRAY))
{
if ((capabilities & GIMP_EXPORT_CAN_HANDLE_RGB) &&
(capabilities & GIMP_EXPORT_CAN_HANDLE_INDEXED))
actions = g_slist_prepend (actions,
&export_action_convert_rgb_or_indexed);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_RGB)
actions = g_slist_prepend (actions,
&export_action_convert_rgb);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_INDEXED)
actions = g_slist_prepend (actions,
&export_action_convert_indexed);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_BITMAP)
actions = g_slist_prepend (actions,
&export_action_convert_bitmap);
}
break;
case GIMP_INDEXED:
if (! (capabilities & GIMP_EXPORT_CAN_HANDLE_INDEXED))
{
if ((capabilities & GIMP_EXPORT_CAN_HANDLE_RGB) &&
(capabilities & GIMP_EXPORT_CAN_HANDLE_GRAY))
actions = g_slist_prepend (actions,
&export_action_convert_rgb_or_grayscale);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_RGB)
actions = g_slist_prepend (actions,
&export_action_convert_rgb);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_GRAY)
actions = g_slist_prepend (actions,
&export_action_convert_grayscale);
else if (capabilities & GIMP_EXPORT_CAN_HANDLE_BITMAP)
{
gint n_colors;
g_free (gimp_image_get_colormap (*image_ID, &n_colors));
if (n_colors > 2)
actions = g_slist_prepend (actions,
&export_action_convert_bitmap);
}
}
break;
}
if (actions)
{
actions = g_slist_reverse (actions);
if (interactive)
retval = export_dialog (actions, format_name);
else
retval = GIMP_EXPORT_EXPORT;
}
else
{
retval = GIMP_EXPORT_IGNORE;
}
if (retval == GIMP_EXPORT_EXPORT)
{
GSList *list;
*image_ID = gimp_image_duplicate (*image_ID);
*drawable_ID = gimp_image_get_active_layer (*image_ID);
gimp_image_undo_disable (*image_ID);
for (list = actions; list; list = list->next)
{
export_action_perform (list->data, *image_ID, drawable_ID);
}
}
g_slist_free (actions);
return retval;
}
/**
* gimp_export_dialog_new:
* @format_name: The short name of the image_format (e.g. JPEG or PNG).
* @role: The dialog's @role which will be set with
* gtk_window_set_role().
* @help_id: The GIMP help id.
*
* Creates a new export dialog. All file plug-ins should use this
* dialog to get a consistent look on the export dialogs. Use
* gimp_export_dialog_get_content_area() to get a #GtkVBox to be
* filled with export options. The export dialog is a wrapped
* #GimpDialog.
*
* The dialog response when the user clicks on the Export button is
* %GTK_RESPONSE_OK, and when the Cancel button is clicked it is
* %GTK_RESPONSE_CANCEL.
*
* Returns: The new export dialog.
*
* Since: 2.8
**/
GtkWidget *
gimp_export_dialog_new (const gchar *format_name,
const gchar *role,
const gchar *help_id)
{
GtkWidget *dialog = NULL;
GtkWidget *button = NULL;
gchar *title = g_strconcat (_("Export Image as "), format_name, NULL);
dialog = gimp_dialog_new (title, role,
NULL, 0,
gimp_standard_help_func, help_id,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
NULL);
button = gimp_dialog_add_button (GIMP_DIALOG (dialog),
_("_Export"), GTK_RESPONSE_OK);
gtk_button_set_image (GTK_BUTTON (button),
gtk_image_new_from_icon_name ("document-save",
GTK_ICON_SIZE_BUTTON));
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
g_free (title);
return dialog;
}
/**
* gimp_export_dialog_get_content_area:
* @dialog: A dialog created with gimp_export_dialog_new()
*
* Returns the #GtkVBox of the passed export dialog to be filled with
* export options.
*
* Returns: The #GtkVBox to fill with export options.
*
* Since: 2.8
**/
GtkWidget *
gimp_export_dialog_get_content_area (GtkWidget *dialog)
{
return gtk_dialog_get_content_area (GTK_DIALOG (dialog));
}
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