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gimp/app/tools/gimptransformtool.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "core/gimpimage-item-list.h"
#include "core/gimpimage-undo.h"
#include "core/gimpitem-linked.h"
#include "core/gimplayer.h"
#include "core/gimplayermask.h"
#include "core/gimpprogress.h"
#include "core/gimp-transform-resize.h"
#include "vectors/gimpvectors.h"
#include "display/gimpdisplay.h"
#include "widgets/gimpmessagedialog.h"
#include "widgets/gimpmessagebox.h"
#include "widgets/gimpwidgets-utils.h"
#include "gimptoolcontrol.h"
#include "gimptools-utils.h"
#include "gimptransformoptions.h"
#include "gimptransformtool.h"
#include "gimp-intl.h"
/* the minimal ratio between the transformed item size and the image size,
* above which confirmation is required.
*/
#define MIN_CONFIRMATION_RATIO 10
/* local function prototypes */
static gchar * gimp_transform_tool_real_get_undo_desc (GimpTransformTool *tr_tool);
static GimpTransformDirection gimp_transform_tool_real_get_direction (GimpTransformTool *tr_tool);
static GeglBuffer * gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GimpItem *item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y);
static gboolean gimp_transform_tool_confirm (GimpTransformTool *tr_tool,
GimpDisplay *display);
G_DEFINE_TYPE (GimpTransformTool, gimp_transform_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_transform_tool_parent_class
/* private functions */
static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
klass->recalc_matrix = NULL;
klass->get_undo_desc = gimp_transform_tool_real_get_undo_desc;
klass->get_direction = gimp_transform_tool_real_get_direction;
klass->transform = gimp_transform_tool_real_transform;
klass->undo_desc = _("Transform");
klass->progress_text = _("Transforming");
}
static void
gimp_transform_tool_init (GimpTransformTool *tr_tool)
{
gimp_matrix3_identity (&tr_tool->transform);
tr_tool->transform_valid = TRUE;
}
static gchar *
gimp_transform_tool_real_get_undo_desc (GimpTransformTool *tr_tool)
{
return g_strdup (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->undo_desc);
}
static GimpTransformDirection
gimp_transform_tool_real_get_direction (GimpTransformTool *tr_tool)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
return options->direction;
}
static GeglBuffer *
gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GimpItem *active_item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpTransformToolClass *klass = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GeglBuffer *ret = NULL;
GimpTransformResize clip = options->clip;
GimpTransformDirection direction;
GimpProgress *progress;
direction = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (tr_tool);
progress = gimp_progress_start (GIMP_PROGRESS (tool), FALSE,
"%s", klass->progress_text);
while (g_main_context_pending (NULL))
g_main_context_iteration (NULL, FALSE);
if (orig_buffer)
{
/* this happens when transforming a selection cut out of a
* normal drawable, or the selection
*/
/* always clip the selection and unfloated channels
* so they keep their size
*/
if (GIMP_IS_CHANNEL (active_item) &&
! babl_format_has_alpha (gegl_buffer_get_format (orig_buffer)))
clip = GIMP_TRANSFORM_RESIZE_CLIP;
ret = gimp_drawable_transform_buffer_affine (GIMP_DRAWABLE (active_item),
context,
orig_buffer,
orig_offset_x,
orig_offset_y,
&tr_tool->transform,
direction,
options->interpolation,
clip,
buffer_profile,
new_offset_x,
new_offset_y,
progress);
}
else
{
/* this happens for entire drawables, paths and layer groups */
if (gimp_item_get_linked (active_item))
{
gimp_item_linked_transform (active_item, context,
&tr_tool->transform,
direction,
options->interpolation,
clip,
progress);
}
else
{
/* always clip layer masks so they keep their size
*/
if (GIMP_IS_CHANNEL (active_item))
clip = GIMP_TRANSFORM_RESIZE_CLIP;
gimp_item_transform (active_item, context,
&tr_tool->transform,
direction,
options->interpolation,
clip,
progress);
}
}
if (progress)
gimp_progress_end (progress);
return ret;
}
static gboolean
gimp_transform_tool_confirm (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpItem *active_item;
gdouble max_ratio = 0.0;
active_item = gimp_transform_tool_get_active_item (tr_tool, display);
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
{
GimpMatrix3 transform;
GimpTransformDirection direction;
GeglRectangle selection_bounds;
gboolean selection_empty = TRUE;
GList *items;
GList *iter;
transform = tr_tool->transform;
direction = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (
tr_tool);
if (direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&transform);
if (options->type == GIMP_TRANSFORM_TYPE_LAYER &&
! gimp_viewable_get_children (GIMP_VIEWABLE (active_item)))
{
selection_empty = ! gimp_item_bounds (
GIMP_ITEM (gimp_image_get_mask (image)),
&selection_bounds.x, &selection_bounds.y,
&selection_bounds.width, &selection_bounds.height);
}
if (selection_empty && gimp_item_get_linked (active_item))
{
items = gimp_image_item_list_get_list (image,
GIMP_ITEM_TYPE_ALL,
GIMP_ITEM_SET_LINKED);
}
else
{
items = g_list_append (NULL, active_item);
}
for (iter = items; iter; iter = g_list_next (iter))
{
GimpItem *item = iter->data;
GimpTransformResize clip = options->clip;
GeglRectangle orig_bounds;
GeglRectangle new_bounds;
if (GIMP_IS_DRAWABLE (item))
{
if (selection_empty)
{
gimp_item_get_offset (item, &orig_bounds.x, &orig_bounds.y);
orig_bounds.width = gimp_item_get_width (item);
orig_bounds.height = gimp_item_get_height (item);
}
else
{
orig_bounds = selection_bounds;
}
clip = gimp_drawable_transform_get_effective_clip (
GIMP_DRAWABLE (item), NULL, clip);
}
else
{
gimp_item_bounds (item,
&orig_bounds.x, &orig_bounds.y,
&orig_bounds.width, &orig_bounds.height);
clip = GIMP_TRANSFORM_RESIZE_ADJUST;
}
gimp_transform_resize_boundary (&transform, clip,
orig_bounds.x,
orig_bounds.y,
orig_bounds.x + orig_bounds.width,
orig_bounds.y + orig_bounds.height,
&new_bounds.x,
&new_bounds.y,
&new_bounds.width,
&new_bounds.height);
new_bounds.width -= new_bounds.x;
new_bounds.height -= new_bounds.y;
if (new_bounds.width > orig_bounds.width)
{
max_ratio = MAX (max_ratio,
(gdouble) new_bounds.width /
(gdouble) gimp_image_get_width (image));
}
if (new_bounds.height > orig_bounds.height)
{
max_ratio = MAX (max_ratio,
(gdouble) new_bounds.height /
(gdouble) gimp_image_get_height (image));
}
}
g_list_free (items);
}
if (max_ratio > MIN_CONFIRMATION_RATIO)
{
GtkWidget *dialog;
gint response;
dialog = gimp_message_dialog_new (_("Confirm Transformation"),
GIMP_ICON_DIALOG_WARNING,
GTK_WIDGET (shell),
GTK_DIALOG_MODAL |
GTK_DIALOG_DESTROY_WITH_PARENT,
gimp_standard_help_func, NULL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Transform"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_message_box_set_primary_text (GIMP_MESSAGE_DIALOG (dialog)->box,
_("Transformation creates "
"a very large item."));
gimp_message_box_set_text (GIMP_MESSAGE_DIALOG (dialog)->box,
_("Applying the transformation will result "
"in an item that is over %g times larger "
"than the image."),
floor (max_ratio));
response = gtk_dialog_run (GTK_DIALOG (dialog));
gtk_widget_destroy (dialog);
if (response != GTK_RESPONSE_OK)
return FALSE;
}
return TRUE;
}
/* public functions */
gboolean
gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options;
GimpImage *image;
gboolean non_empty = TRUE;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), FALSE);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = gimp_display_get_image (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
{
GimpDrawable *drawable;
gint offset_x;
gint offset_y;
gint x, y;
gint width, height;
drawable = gimp_image_get_active_drawable (image);
gimp_item_get_offset (GIMP_ITEM (drawable), &offset_x, &offset_y);
non_empty = gimp_item_mask_intersect (GIMP_ITEM (drawable),
&x, &y, &width, &height);
tr_tool->x1 = x + offset_x;
tr_tool->y1 = y + offset_y;
tr_tool->x2 = x + width + offset_x;
tr_tool->y2 = y + height + offset_y;
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
{
gimp_item_bounds (GIMP_ITEM (gimp_image_get_mask (image)),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
tr_tool->x2 += tr_tool->x1;
tr_tool->y2 += tr_tool->y1;
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
{
GimpChannel *selection = gimp_image_get_mask (image);
/* if selection is not empty, use its bounds to perform the
* transformation of the path
*/
if (! gimp_channel_is_empty (selection))
{
gimp_item_bounds (GIMP_ITEM (selection),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
}
else
{
/* without selection, test the emptiness of the path bounds :
* if empty, use the canvas bounds
* else use the path bounds
*/
if (! gimp_item_bounds (GIMP_ITEM (gimp_image_get_active_vectors (image)),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2))
{
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = gimp_image_get_width (image);
tr_tool->y2 = gimp_image_get_height (image);
}
}
tr_tool->x2 += tr_tool->x1;
tr_tool->y2 += tr_tool->y1;
}
break;
}
return non_empty;
}
void
gimp_transform_tool_recalc_matrix (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
g_return_if_fail (GIMP_IS_DISPLAY (display));
gimp_transform_tool_bounds (tr_tool, display);
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix (tr_tool);
}
GimpItem *
gimp_transform_tool_get_active_item (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options;
GimpImage *image;
GimpItem *item = NULL;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = gimp_display_get_image (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
if (tr_tool->item)
return tr_tool->item;
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
item = GIMP_ITEM (gimp_image_get_active_drawable (image));
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
item = GIMP_ITEM (gimp_image_get_mask (image));
if (gimp_channel_is_empty (GIMP_CHANNEL (item)))
item = NULL;
break;
case GIMP_TRANSFORM_TYPE_PATH:
item = GIMP_ITEM (gimp_image_get_active_vectors (image));
break;
}
return item;
}
GimpItem *
gimp_transform_tool_check_active_item (GimpTransformTool *tr_tool,
GimpDisplay *display,
GError **error)
{
GimpTransformOptions *options;
GimpItem *item;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
item = gimp_transform_tool_get_active_item (tr_tool, display);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
null_message = _("There is no layer to transform.");
if (item)
{
if (gimp_item_is_content_locked (item))
locked_message = _("The active layer's pixels are locked.");
else if (gimp_item_is_position_locked (item))
locked_message = _("The active layer's position and size are locked.");
if (! gimp_item_is_visible (item) &&
item != tr_tool->item) /* see bug #759194 */
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The active layer is not visible."));
return NULL;
}
if (! gimp_transform_tool_bounds (tr_tool, display))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The selection does not intersect with the layer."));
return NULL;
}
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
null_message = _("There is no selection to transform.");
if (item)
{
/* cannot happen, so don't translate these messages */
if (gimp_item_is_content_locked (item))
locked_message = "The selection's pixels are locked.";
else if (gimp_item_is_position_locked (item))
locked_message = "The selection's position and size are locked.";
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
null_message = _("There is no path to transform.");
if (item)
{
if (gimp_item_is_content_locked (item))
locked_message = _("The active path's strokes are locked.");
else if (gimp_item_is_position_locked (item))
locked_message = _("The active path's position is locked.");
else if (! gimp_vectors_get_n_strokes (GIMP_VECTORS (item)))
locked_message = _("The active path has no strokes.");
}
break;
}
if (! item)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, null_message);
if (error)
gimp_widget_blink (options->type_box);
return NULL;
}
if (locked_message)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, locked_message);
if (error)
gimp_tools_blink_lock_box (display->gimp, item);
return NULL;
}
return item;
}
gboolean
gimp_transform_tool_transform (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTool *tool;
GimpTransformOptions *options;
GimpContext *context;
GimpImage *image;
GimpItem *active_item;
GeglBuffer *orig_buffer = NULL;
gint orig_offset_x = 0;
gint orig_offset_y = 0;
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
GimpColorProfile *buffer_profile;
gchar *undo_desc = NULL;
gboolean new_layer = FALSE;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
tool = GIMP_TOOL (tr_tool);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
context = GIMP_CONTEXT (options);
image = gimp_display_get_image (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
active_item = gimp_transform_tool_check_active_item (tr_tool, display,
&error);
if (! active_item)
{
gimp_tool_message_literal (tool, display, error->message);
g_clear_error (&error);
return FALSE;
}
gimp_transform_tool_recalc_matrix (tr_tool, display);
if (! tr_tool->transform_valid)
{
gimp_tool_message_literal (tool, display,
_("The current transform is invalid"));
return FALSE;
}
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix &&
gimp_matrix3_is_identity (&tr_tool->transform))
{
/* No need to commit an identity transformation! */
return TRUE;
}
if (! gimp_transform_tool_confirm (tr_tool, display))
return FALSE;
gimp_set_busy (display->gimp);
/* We're going to dirty this image, but we want to keep the tool around */
gimp_tool_control_push_preserve (tool->control, TRUE);
undo_desc = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_undo_desc (tr_tool);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TRANSFORM, undo_desc);
g_free (undo_desc);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
if (! gimp_viewable_get_children (GIMP_VIEWABLE (active_item)) &&
! gimp_channel_is_empty (gimp_image_get_mask (image)))
{
orig_buffer = gimp_drawable_transform_cut (GIMP_DRAWABLE (active_item),
context,
&orig_offset_x,
&orig_offset_y,
&new_layer);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
orig_buffer = g_object_ref (gimp_drawable_get_buffer (GIMP_DRAWABLE (active_item)));
break;
case GIMP_TRANSFORM_TYPE_PATH:
break;
}
/* Send the request for the transformation to the tool...
*/
new_buffer = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->transform (tr_tool,
active_item,
orig_buffer,
orig_offset_x,
orig_offset_y,
&buffer_profile,
&new_offset_x,
&new_offset_y);
if (orig_buffer)
g_object_unref (orig_buffer);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
if (new_buffer)
{
/* paste the new transformed image to the image...also implement
* undo...
*/
gimp_drawable_transform_paste (GIMP_DRAWABLE (active_item),
new_buffer, buffer_profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
if (new_buffer)
{
gimp_channel_push_undo (GIMP_CHANNEL (active_item), NULL);
gimp_drawable_set_buffer (GIMP_DRAWABLE (active_item),
FALSE, NULL, new_buffer);
g_object_unref (new_buffer);
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
/* Nothing to be done */
break;
}
gimp_image_undo_group_end (image);
/* We're done dirtying the image, and would like to be restarted if
* the image gets dirty while the tool exists
*/
gimp_tool_control_pop_preserve (tool->control);
gimp_unset_busy (display->gimp);
gimp_image_flush (image);
return TRUE;
}
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