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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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/tile-manager.h"
#include "core/gimp.h"
#include "core/gimpboundary.h"
#include "core/gimpcontext.h"
#include "core/gimpchannel.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimpitem-linked.h"
#include "core/gimplayer.h"
#include "core/gimpprogress.h"
#include "core/gimptoolinfo.h"
#include "core/gimp-transform-utils.h"
#include "core/gimp-utils.h"
#include "vectors/gimpvectors.h"
#include "vectors/gimpstroke.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasgroup.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-transform.h"
#include "display/gimptooldialog.h"
#include "gimptoolcontrol.h"
#include "gimpperspectivetool.h"
#include "gimptransformoptions.h"
#include "gimptransformtool.h"
#include "gimptransformtoolundo.h"
#include "gimp-intl.h"
#define RESPONSE_RESET 1
#define MIN_HANDLE_SIZE 6
static void gimp_transform_tool_finalize (GObject *object);
static gboolean gimp_transform_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_transform_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_transform_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_transform_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_transform_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static gboolean gimp_transform_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_transform_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_transform_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_transform_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_transform_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec);
static void gimp_transform_tool_draw (GimpDrawTool *draw_tool);
static void gimp_transform_tool_dialog_update (GimpTransformTool *tr_tool);
static TileManager *
gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GimpItem *item,
TileManager *orig_tiles,
const Babl *orig_format,
gint orig_offset_x,
gint orig_offset_y,
gint *new_offset_x,
gint *new_offset_y);
static void gimp_transform_tool_set_function (GimpTransformTool *tr_tool,
TransformAction function);
static void gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_transform_tool_dialog (GimpTransformTool *tr_tool);
static void gimp_transform_tool_prepare (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_transform_tool_transform (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool);
static void gimp_transform_tool_handles_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display,
gint *handle_w,
gint *handle_h);
static void gimp_transform_tool_response (GtkWidget *widget,
gint response_id,
GimpTransformTool *tr_tool);
G_DEFINE_TYPE (GimpTransformTool, gimp_transform_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_transform_tool_parent_class
static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_class = GIMP_DRAW_TOOL_CLASS (klass);
object_class->finalize = gimp_transform_tool_finalize;
tool_class->initialize = gimp_transform_tool_initialize;
tool_class->control = gimp_transform_tool_control;
tool_class->button_press = gimp_transform_tool_button_press;
tool_class->button_release = gimp_transform_tool_button_release;
tool_class->motion = gimp_transform_tool_motion;
tool_class->key_press = gimp_transform_tool_key_press;
tool_class->modifier_key = gimp_transform_tool_modifier_key;
tool_class->active_modifier_key = gimp_transform_tool_modifier_key;
tool_class->oper_update = gimp_transform_tool_oper_update;
tool_class->cursor_update = gimp_transform_tool_cursor_update;
tool_class->options_notify = gimp_transform_tool_options_notify;
draw_class->draw = gimp_transform_tool_draw;
klass->dialog = NULL;
klass->dialog_update = NULL;
klass->prepare = NULL;
klass->motion = NULL;
klass->recalc_matrix = NULL;
klass->get_undo_desc = NULL;
klass->transform = gimp_transform_tool_real_transform;
}
static void
gimp_transform_tool_init (GimpTransformTool *tr_tool)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
gimp_tool_control_set_action_value_1 (tool->control,
"tools/tools-transform-preview-opacity-set");
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_preserve (tool->control, FALSE);
gimp_tool_control_set_dirty_mask (tool->control,
GIMP_DIRTY_IMAGE_SIZE |
GIMP_DIRTY_DRAWABLE |
GIMP_DIRTY_SELECTION);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_SUBPIXEL);
tr_tool->function = TRANSFORM_CREATING;
gimp_matrix3_identity (&tr_tool->transform);
tr_tool->progress_text = _("Transforming");
}
static void
gimp_transform_tool_finalize (GObject *object)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (object);
if (tr_tool->dialog)
{
gtk_widget_destroy (tr_tool->dialog);
tr_tool->dialog = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_transform_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The active layer's pixels are locked."));
return FALSE;
}
if (display != tool->display)
{
gint i;
/* Set the pointer to the active display */
tool->display = display;
tool->drawable = drawable;
/* Initialize the transform tool dialog */
if (! tr_tool->dialog)
gimp_transform_tool_dialog (tr_tool);
/* Find the transform bounds for some tools (like scale,
* perspective) that actually need the bounds for initializing
*/
gimp_transform_tool_bounds (tr_tool, display);
/* Inizialize the tool-specific trans_info, and adjust the
* tool dialog
*/
gimp_transform_tool_prepare (tr_tool, display);
/* Recalculate the transform tool */
gimp_transform_tool_recalc_matrix (tr_tool);
/* start drawing the bounding box and handles... */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
tr_tool->function = TRANSFORM_CREATING;
/* Save the current transformation info */
for (i = 0; i < TRANS_INFO_SIZE; i++)
{
tr_tool->old_trans_info[i] = tr_tool->trans_info[i];
tr_tool->prev_trans_info[i] = tr_tool->trans_info[i];
}
}
return TRUE;
}
static void
gimp_transform_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
break;
case GIMP_TOOL_ACTION_RESUME:
gimp_transform_tool_bounds (tr_tool, display);
gimp_transform_tool_recalc_matrix (tr_tool);
break;
case GIMP_TOOL_ACTION_HALT:
tr_tool->function = TRANSFORM_CREATING;
if (tr_tool->dialog)
gimp_dialog_factory_hide_dialog (tr_tool->dialog);
tool->drawable = NULL;
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_transform_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
gint i;
if (tr_tool->function == TRANSFORM_CREATING)
gimp_transform_tool_oper_update (tool, coords, state, TRUE, display);
tr_tool->lastx = coords->x;
tr_tool->lasty = coords->y;
/* Store current trans_info */
for (i = 0; i < TRANS_INFO_SIZE; i++)
tr_tool->prev_trans_info[i] = tr_tool->trans_info[i];
gimp_tool_control_activate (tool->control);
}
static void
gimp_transform_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
gint i;
gimp_tool_control_halt (tool->control);
/* if we are creating, there is nothing to be done...exit */
if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
return;
if (release_type != GIMP_BUTTON_RELEASE_CANCEL)
{
/* Shift-clicking is another way to approve the transform */
if ((state & GDK_SHIFT_MASK) || ! tr_tool->use_grid)
{
gimp_transform_tool_response (NULL, GTK_RESPONSE_OK, tr_tool);
}
}
else
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* Restore the previous trans_info */
for (i = 0; i < TRANS_INFO_SIZE; i++)
tr_tool->trans_info[i] = tr_tool->prev_trans_info[i];
/* reget the selection bounds */
gimp_transform_tool_bounds (tr_tool, display);
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
}
static void
gimp_transform_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
/* if we are creating, there is nothing to be done so exit. */
if (tr_tool->function == TRANSFORM_CREATING || ! tr_tool->use_grid)
return;
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
tr_tool->curx = coords->x;
tr_tool->cury = coords->y;
/* recalculate the tool's transformation matrix */
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->motion)
{
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->motion (tr_tool);
gimp_transform_tool_recalc_matrix (tr_tool);
}
tr_tool->lastx = tr_tool->curx;
tr_tool->lasty = tr_tool->cury;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static gboolean
gimp_transform_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpTransformTool *trans_tool = GIMP_TRANSFORM_TOOL (tool);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
if (display == draw_tool->display)
{
switch (kevent->keyval)
{
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
case GDK_KEY_ISO_Enter:
gimp_transform_tool_response (NULL, GTK_RESPONSE_OK, trans_tool);
return TRUE;
case GDK_KEY_BackSpace:
gimp_transform_tool_response (NULL, RESPONSE_RESET, trans_tool);
return TRUE;
case GDK_KEY_Escape:
gimp_transform_tool_response (NULL, GTK_RESPONSE_CANCEL, trans_tool);
return TRUE;
}
}
return FALSE;
}
static void
gimp_transform_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
if (key == gimp_get_constrain_behavior_mask ())
g_object_set (options,
"constrain", ! options->constrain,
NULL);
}
static void
gimp_transform_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
TransformAction function = TRANSFORM_HANDLE_NONE;
if (display != tool->display || draw_tool->item == NULL)
{
gimp_transform_tool_set_function (tr_tool, function);
return;
}
if (tr_tool->use_handles)
{
gdouble closest_dist;
gdouble dist;
dist = gimp_draw_tool_calc_distance_square (draw_tool, display,
coords->x, coords->y,
tr_tool->tx1, tr_tool->ty1);
closest_dist = dist;
function = TRANSFORM_HANDLE_NW;
dist = gimp_draw_tool_calc_distance_square (draw_tool, display,
coords->x, coords->y,
tr_tool->tx2, tr_tool->ty2);
if (dist < closest_dist)
{
closest_dist = dist;
function = TRANSFORM_HANDLE_NE;
}
dist = gimp_draw_tool_calc_distance_square (draw_tool, display,
coords->x, coords->y,
tr_tool->tx3, tr_tool->ty3);
if (dist < closest_dist)
{
closest_dist = dist;
function = TRANSFORM_HANDLE_SW;
}
dist = gimp_draw_tool_calc_distance_square (draw_tool, display,
coords->x, coords->y,
tr_tool->tx4, tr_tool->ty4);
if (dist < closest_dist)
{
closest_dist = dist;
function = TRANSFORM_HANDLE_SE;
}
if (tr_tool->use_mid_handles)
{
if (gimp_canvas_item_hit (tr_tool->handles[TRANSFORM_HANDLE_N],
coords->x, coords->y))
{
function = TRANSFORM_HANDLE_N;
}
else if (gimp_canvas_item_hit (tr_tool->handles[TRANSFORM_HANDLE_E],
coords->x, coords->y))
{
function = TRANSFORM_HANDLE_E;
}
else if (gimp_canvas_item_hit (tr_tool->handles[TRANSFORM_HANDLE_S],
coords->x, coords->y))
{
function = TRANSFORM_HANDLE_S;
}
else if (gimp_canvas_item_hit (tr_tool->handles[TRANSFORM_HANDLE_W],
coords->x, coords->y))
{
function = TRANSFORM_HANDLE_W;
}
}
}
if (tr_tool->use_center &&
gimp_canvas_item_hit (tr_tool->handles[TRANSFORM_HANDLE_CENTER],
coords->x, coords->y))
{
function = TRANSFORM_HANDLE_CENTER;
}
gimp_transform_tool_set_function (tr_tool, function);
}
static void
gimp_transform_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpCursorType cursor;
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_NONE;
GimpImage *image = gimp_display_get_image (display);
cursor = gimp_tool_control_get_cursor (tool->control);
if (tr_tool->use_handles)
{
switch (tr_tool->function)
{
case TRANSFORM_HANDLE_NW:
cursor = GIMP_CURSOR_CORNER_TOP_LEFT;
break;
case TRANSFORM_HANDLE_NE:
cursor = GIMP_CURSOR_CORNER_TOP_RIGHT;
break;
case TRANSFORM_HANDLE_SW:
cursor = GIMP_CURSOR_CORNER_BOTTOM_LEFT;
break;
case TRANSFORM_HANDLE_SE:
cursor = GIMP_CURSOR_CORNER_BOTTOM_RIGHT;
break;
case TRANSFORM_HANDLE_N:
cursor = GIMP_CURSOR_SIDE_TOP;
break;
case TRANSFORM_HANDLE_E:
cursor = GIMP_CURSOR_SIDE_RIGHT;
break;
case TRANSFORM_HANDLE_S:
cursor = GIMP_CURSOR_SIDE_BOTTOM;
break;
case TRANSFORM_HANDLE_W:
cursor = GIMP_CURSOR_SIDE_LEFT;
break;
default:
cursor = GIMP_CURSOR_CROSSHAIR_SMALL;
break;
}
}
if (tr_tool->use_center && tr_tool->function == TRANSFORM_HANDLE_CENTER)
{
modifier = GIMP_CURSOR_MODIFIER_MOVE;
}
switch (options->type)
{
GimpDrawable *drawable;
case GIMP_TRANSFORM_TYPE_LAYER:
drawable = gimp_image_get_active_drawable (image);
if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
modifier = GIMP_CURSOR_MODIFIER_BAD;
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
break;
case GIMP_TRANSFORM_TYPE_PATH:
if (! gimp_image_get_active_vectors (image))
modifier = GIMP_CURSOR_MODIFIER_BAD;
break;
}
gimp_tool_control_set_cursor (tool->control, cursor);
gimp_tool_control_set_cursor_modifier (tool->control, modifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_transform_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GIMP_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
if (tr_tool->use_grid)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
if (! strcmp (pspec->name, "type") ||
! strcmp (pspec->name, "direction"))
{
if (tr_tool->function != TRANSFORM_CREATING)
{
if (tool->display)
{
/* reget the selection bounds */
gimp_transform_tool_bounds (tr_tool, tool->display);
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool);
}
}
}
if (tr_tool->function != TRANSFORM_CREATING)
{
gimp_transform_tool_transform_bounding_box (tr_tool);
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
}
if (! strcmp (pspec->name, "constrain"))
{
gimp_transform_tool_dialog_update (tr_tool);
}
}
static void
gimp_transform_tool_draw (GimpDrawTool *draw_tool)
{
GimpTool *tool = GIMP_TOOL (draw_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpImage *image = gimp_display_get_image (tool->display);
gint handle_w;
gint handle_h;
gint i;
for (i = 0; i < G_N_ELEMENTS (tr_tool->handles); i++)
tr_tool->handles[i] = NULL;
if (tr_tool->use_grid)
{
if (gimp_transform_options_show_preview (options))
{
gimp_draw_tool_add_transform_preview (draw_tool,
tool->drawable,
&tr_tool->transform,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2,
GIMP_IS_PERSPECTIVE_TOOL (tr_tool),
options->preview_opacity);
}
gimp_draw_tool_add_transform_guides (draw_tool,
&tr_tool->transform,
options->grid_type,
options->grid_size,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2);
}
gimp_transform_tool_handles_recalc (tr_tool, tool->display,
&handle_w, &handle_h);
if (tr_tool->use_handles)
{
/* draw the tool handles */
tr_tool->handles[TRANSFORM_HANDLE_NW] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx1, tr_tool->ty1,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
tr_tool->handles[TRANSFORM_HANDLE_NE] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx2, tr_tool->ty2,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
tr_tool->handles[TRANSFORM_HANDLE_SW] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx3, tr_tool->ty3,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
tr_tool->handles[TRANSFORM_HANDLE_SE] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx4, tr_tool->ty4,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
if (tr_tool->use_mid_handles)
{
gdouble x, y;
x = (tr_tool->tx1 + tr_tool->tx2) / 2.0;
y = (tr_tool->ty1 + tr_tool->ty2) / 2.0;
tr_tool->handles[TRANSFORM_HANDLE_N] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
x = (tr_tool->tx2 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty2 + tr_tool->ty4) / 2.0;
tr_tool->handles[TRANSFORM_HANDLE_E] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
x = (tr_tool->tx3 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty4) / 2.0;
tr_tool->handles[TRANSFORM_HANDLE_S] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
x = (tr_tool->tx3 + tr_tool->tx1) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty1) / 2.0;
tr_tool->handles[TRANSFORM_HANDLE_W] =
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
handle_w, handle_h,
GIMP_HANDLE_ANCHOR_CENTER);
}
}
/* draw the center */
if (tr_tool->use_center)
{
GimpCanvasGroup *stroke_group;
gint d = MIN (handle_w, handle_h);
stroke_group = gimp_draw_tool_add_stroke_group (draw_tool);
tr_tool->handles[TRANSFORM_HANDLE_CENTER] = GIMP_CANVAS_ITEM (stroke_group);
gimp_draw_tool_push_group (draw_tool, stroke_group);
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_CIRCLE,
tr_tool->tcx, tr_tool->tcy,
d, d,
GIMP_HANDLE_ANCHOR_CENTER);
gimp_draw_tool_add_handle (draw_tool,
GIMP_HANDLE_CROSS,
tr_tool->tcx, tr_tool->tcy,
d, d,
GIMP_HANDLE_ANCHOR_CENTER);
gimp_draw_tool_pop_group (draw_tool);
}
if (tr_tool->handles[tr_tool->function])
{
gimp_canvas_item_set_highlight (tr_tool->handles[tr_tool->function],
TRUE);
}
if (options->type == GIMP_TRANSFORM_TYPE_SELECTION)
{
GimpMatrix3 matrix = tr_tool->transform;
const GimpBoundSeg *orig_in;
const GimpBoundSeg *orig_out;
GimpBoundSeg *segs_in;
GimpBoundSeg *segs_out;
gint num_segs_in;
gint num_segs_out;
gimp_channel_boundary (gimp_image_get_mask (image),
&orig_in, &orig_out,
&num_segs_in, &num_segs_out,
0, 0, 0, 0);
segs_in = g_memdup (orig_in, num_segs_in * sizeof (GimpBoundSeg));
segs_out = g_memdup (orig_out, num_segs_out * sizeof (GimpBoundSeg));
if (segs_in)
{
for (i = 0; i < num_segs_in; i++)
{
gdouble tx, ty;
gimp_matrix3_transform_point (&matrix,
segs_in[i].x1, segs_in[i].y1,
&tx, &ty);
segs_in[i].x1 = RINT (tx);
segs_in[i].y1 = RINT (ty);
gimp_matrix3_transform_point (&matrix,
segs_in[i].x2, segs_in[i].y2,
&tx, &ty);
segs_in[i].x2 = RINT (tx);
segs_in[i].y2 = RINT (ty);
}
gimp_draw_tool_add_boundary (draw_tool,
segs_in, num_segs_in,
NULL,
0, 0);
g_free (segs_in);
}
if (segs_out)
{
for (i = 0; i < num_segs_out; i++)
{
gdouble tx, ty;
gimp_matrix3_transform_point (&matrix,
segs_out[i].x1, segs_out[i].y1,
&tx, &ty);
segs_out[i].x1 = RINT (tx);
segs_out[i].y1 = RINT (ty);
gimp_matrix3_transform_point (&matrix,
segs_out[i].x2, segs_out[i].y2,
&tx, &ty);
segs_out[i].x2 = RINT (tx);
segs_out[i].y2 = RINT (ty);
}
gimp_draw_tool_add_boundary (draw_tool,
segs_out, num_segs_out,
NULL,
0, 0);
g_free (segs_out);
}
}
else if (options->type == GIMP_TRANSFORM_TYPE_PATH)
{
GimpVectors *vectors;
GimpStroke *stroke = NULL;
GimpMatrix3 matrix = tr_tool->transform;
vectors = gimp_image_get_active_vectors (image);
if (vectors)
{
if (options->direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&matrix);
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GArray *coords;
gboolean closed;
coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
if (coords && coords->len)
{
gint i;
for (i = 0; i < coords->len; i++)
{
GimpCoords *curr = &g_array_index (coords, GimpCoords, i);
gimp_matrix3_transform_point (&matrix,
curr->x, curr->y,
&curr->x, &curr->y);
}
gimp_draw_tool_add_strokes (draw_tool,
&g_array_index (coords,
GimpCoords, 0),
coords->len, FALSE);
}
if (coords)
g_array_free (coords, TRUE);
}
}
}
}
static void
gimp_transform_tool_dialog_update (GimpTransformTool *tr_tool)
{
if (tr_tool->dialog &&
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->dialog_update)
{
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->dialog_update (tr_tool);
}
}
static TileManager *
gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GimpItem *active_item,
TileManager *orig_tiles,
const Babl *orig_format,
gint orig_offset_x,
gint orig_offset_y,
gint *new_offset_x,
gint *new_offset_y)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpProgress *progress;
TileManager *ret = NULL;
GimpTransformResize clip = options->clip;
progress = gimp_progress_start (GIMP_PROGRESS (tool),
tr_tool->progress_text, FALSE);
if (gimp_item_get_linked (active_item))
gimp_item_linked_transform (active_item, context,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
clip,
progress);
if (orig_tiles)
{
/* this happens when transforming a selection cut out of a
* normal drawable, or the selection
*/
/* always clip the selction and unfloated channels
* so they keep their size
*/
if (GIMP_IS_CHANNEL (active_item) &&
tile_manager_bpp (orig_tiles) == 1)
clip = GIMP_TRANSFORM_RESIZE_CLIP;
ret = gimp_drawable_transform_tiles_affine (GIMP_DRAWABLE (active_item),
context,
orig_tiles,
orig_format,
orig_offset_x,
orig_offset_y,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
clip,
new_offset_x,
new_offset_y,
progress);
}
else
{
/* this happens for entire drawables, paths and layer groups */
/* 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,
options->direction,
options->interpolation,
options->recursion_level,
clip,
progress);
}
if (progress)
gimp_progress_end (progress);
return ret;
}
static void
gimp_transform_tool_transform (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpImage *image = gimp_display_get_image (display);
GimpItem *active_item = NULL;
TileManager *orig_tiles = NULL;
const Babl *orig_format = NULL;
gint orig_offset_x;
gint orig_offset_y;
TileManager *new_tiles;
gint new_offset_x;
gint new_offset_y;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
gchar *undo_desc = NULL;
gboolean new_layer;
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
active_item = GIMP_ITEM (gimp_image_get_active_drawable (image));
null_message = _("There is no layer to transform.");
locked_message = _("The active layer's pixels are locked.");
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
active_item = GIMP_ITEM (gimp_image_get_mask (image));
/* cannot happen, so don't translate these messages */
null_message = "There is no selection to transform.";
locked_message = "The selection's pixels are locked.";
break;
case GIMP_TRANSFORM_TYPE_PATH:
active_item = GIMP_ITEM (gimp_image_get_active_vectors (image));
null_message = _("There is no path to transform.");
locked_message = _("The active path's strokes are locked.");
break;
}
if (! active_item)
{
gimp_tool_message_literal (tool, display, null_message);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return;
}
if (gimp_item_is_content_locked (active_item))
{
gimp_tool_message_literal (tool, display, locked_message);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return;
}
if (tr_tool->dialog)
gimp_dialog_factory_hide_dialog (tr_tool->dialog);
gimp_set_busy (display->gimp);
/* undraw the tool before we muck around with the transform matrix */
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tr_tool));
/* We're going to dirty this image, but we want to keep the tool around */
gimp_tool_control_set_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 (tool->drawable)) &&
! gimp_channel_is_empty (gimp_image_get_mask (image)))
{
orig_tiles = gimp_drawable_transform_cut (tool->drawable,
context,
&orig_format,
&orig_offset_x,
&orig_offset_y,
&new_layer);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
orig_tiles = tile_manager_ref (gimp_drawable_get_tiles (GIMP_DRAWABLE (active_item)));
orig_offset_x = 0;
orig_offset_y = 0;
break;
case GIMP_TRANSFORM_TYPE_PATH:
break;
}
/* Send the request for the transformation to the tool...
*/
new_tiles = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->transform (tr_tool,
active_item,
orig_tiles,
orig_format,
orig_offset_x,
orig_offset_y,
&new_offset_x,
&new_offset_y);
if (orig_tiles)
tile_manager_unref (orig_tiles);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
if (new_tiles)
{
/* paste the new transformed image to the image...also implement
* undo...
*/
gimp_drawable_transform_paste (tool->drawable,
new_tiles, orig_format,
new_offset_x, new_offset_y,
new_layer);
tile_manager_unref (new_tiles);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
if (new_tiles)
{
gimp_channel_push_undo (GIMP_CHANNEL (active_item), NULL);
gimp_drawable_set_tiles (GIMP_DRAWABLE (active_item),
FALSE, NULL, new_tiles,
gimp_drawable_type (GIMP_DRAWABLE (active_item)));
tile_manager_unref (new_tiles);
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
/* Nothing to be done */
break;
}
gimp_image_undo_push (image, GIMP_TYPE_TRANSFORM_TOOL_UNDO,
GIMP_UNDO_TRANSFORM, NULL,
0,
"transform-tool", tr_tool,
NULL);
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_set_preserve (tool->control, FALSE);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
gimp_unset_busy (display->gimp);
gimp_image_flush (image);
}
static void
gimp_transform_tool_set_function (GimpTransformTool *tr_tool,
TransformAction function)
{
if (function != tr_tool->function)
{
if (tr_tool->handles[tr_tool->function] &&
gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
{
gimp_canvas_item_set_highlight (tr_tool->handles[tr_tool->function],
FALSE);
}
tr_tool->function = function;
if (tr_tool->handles[tr_tool->function] &&
gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
{
gimp_canvas_item_set_highlight (tr_tool->handles[tr_tool->function],
TRUE);
}
}
}
static void
gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool)
{
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->x1, tr_tool->y1,
&tr_tool->tx1, &tr_tool->ty1);
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->x2, tr_tool->y1,
&tr_tool->tx2, &tr_tool->ty2);
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->x1, tr_tool->y2,
&tr_tool->tx3, &tr_tool->ty3);
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->x2, tr_tool->y2,
&tr_tool->tx4, &tr_tool->ty4);
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->cx, tr_tool->cy,
&tr_tool->tcx, &tr_tool->tcy);
}
static void
gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpImage *image = gimp_display_get_image (display);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
{
GimpDrawable *drawable;
gint offset_x;
gint offset_y;
drawable = gimp_image_get_active_drawable (image);
gimp_item_get_offset (GIMP_ITEM (drawable), &offset_x, &offset_y);
gimp_item_mask_bounds (GIMP_ITEM (drawable),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
tr_tool->x1 += offset_x;
tr_tool->y1 += offset_y;
tr_tool->x2 += offset_x;
tr_tool->y2 += offset_y;
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
case GIMP_TRANSFORM_TYPE_PATH:
gimp_channel_bounds (gimp_image_get_mask (image),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
break;
}
tr_tool->cx = (gdouble) (tr_tool->x1 + tr_tool->x2) / 2.0;
tr_tool->cy = (gdouble) (tr_tool->y1 + tr_tool->y2) / 2.0;
tr_tool->aspect = ((gdouble) (tr_tool->x2 - tr_tool->x1) /
(gdouble) (tr_tool->y2 - tr_tool->y1));
}
static void
gimp_transform_tool_handles_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display,
gint *handle_w,
gint *handle_h)
{
gint dx1, dy1;
gint dx2, dy2;
gint dx3, dy3;
gint dx4, dy4;
gint x1, y1;
gint x2, y2;
gimp_display_shell_transform_xy (gimp_display_get_shell (display),
tr_tool->tx1, tr_tool->ty1,
&dx1, &dy1);
gimp_display_shell_transform_xy (gimp_display_get_shell (display),
tr_tool->tx2, tr_tool->ty2,
&dx2, &dy2);
gimp_display_shell_transform_xy (gimp_display_get_shell (display),
tr_tool->tx3, tr_tool->ty3,
&dx3, &dy3);
gimp_display_shell_transform_xy (gimp_display_get_shell (display),
tr_tool->tx4, tr_tool->ty4,
&dx4, &dy4);
x1 = MIN4 (dx1, dx2, dx3, dx4);
y1 = MIN4 (dy1, dy2, dy3, dy4);
x2 = MAX4 (dx1, dx2, dx3, dx4);
y2 = MAX4 (dy1, dy2, dy3, dy4);
*handle_w = CLAMP ((x2 - x1) / 3,
MIN_HANDLE_SIZE, GIMP_TOOL_HANDLE_SIZE_LARGE);
*handle_h = CLAMP ((y2 - y1) / 3,
MIN_HANDLE_SIZE, GIMP_TOOL_HANDLE_SIZE_LARGE);
}
static void
gimp_transform_tool_dialog (GimpTransformTool *tr_tool)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpToolInfo *tool_info = tool->tool_info;
const gchar *stock_id;
if (! GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->dialog)
return;
stock_id = gimp_viewable_get_stock_id (GIMP_VIEWABLE (tool_info));
tr_tool->dialog = gimp_tool_dialog_new (tool_info,
gimp_display_get_shell (tool->display),
tool_info->blurb,
GIMP_STOCK_RESET, RESPONSE_RESET,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
stock_id, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_default_response (GTK_DIALOG (tr_tool->dialog),
GTK_RESPONSE_OK);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (tr_tool->dialog),
RESPONSE_RESET,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_signal_connect (tr_tool->dialog, "response",
G_CALLBACK (gimp_transform_tool_response),
tr_tool);
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->dialog (tr_tool);
}
static void
gimp_transform_tool_prepare (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
if (tr_tool->dialog)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
gimp_viewable_dialog_set_viewable (GIMP_VIEWABLE_DIALOG (tr_tool->dialog),
GIMP_VIEWABLE (drawable),
GIMP_CONTEXT (options));
gimp_tool_dialog_set_shell (GIMP_TOOL_DIALOG (tr_tool->dialog),
gimp_display_get_shell (display));
}
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->prepare)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->prepare (tr_tool);
}
void
gimp_transform_tool_recalc_matrix (GimpTransformTool *tr_tool)
{
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix (tr_tool);
gimp_transform_tool_transform_bounding_box (tr_tool);
gimp_transform_tool_dialog_update (tr_tool);
if (tr_tool->dialog)
gtk_widget_show (tr_tool->dialog);
}
static void
gimp_transform_tool_response (GtkWidget *widget,
gint response_id,
GimpTransformTool *tr_tool)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
switch (response_id)
{
case RESPONSE_RESET:
{
gint i;
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* Restore the previous transformation info */
for (i = 0; i < TRANS_INFO_SIZE; i++)
tr_tool->trans_info[i] = tr_tool->old_trans_info[i];
/* reget the selection bounds */
gimp_transform_tool_bounds (tr_tool, tool->display);
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
break;
case GTK_RESPONSE_OK:
g_return_if_fail (tool->display != NULL);
gimp_transform_tool_transform (tr_tool, tool->display);
break;
default:
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, tool->display);
break;
}
}
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