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Gimp/app/tools/gimptransformtool.c
Michael Natterer 38b8f0596d app: use the new modifier API instead of constants in all tools 
There are still many uses of literal SHIFT and MOD1 left, but all uses
of CONTROL are gone. Should work exactly as before on Win/X11, and
still has some glitches on OSX.
2011-10-06 21:59:07 +02:00

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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/boundary.h"
#include "base/tile-manager.h"
#include "core/gimp.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,
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 BoundSeg *orig_in;
const BoundSeg *orig_out;
BoundSeg *segs_in;
BoundSeg *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 (BoundSeg));
segs_out = g_memdup (orig_out, num_segs_out * sizeof (BoundSeg));
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,
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;
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,
options->clip,
progress);
if (orig_tiles)
{
/* this happens when transforming a selection cut out of a
* normal drawable, or the selection
*/
GimpTransformResize clip_result = options->clip;
/* 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_result = GIMP_TRANSFORM_RESIZE_CLIP;
ret = gimp_drawable_transform_tiles_affine (GIMP_DRAWABLE (active_item),
context,
orig_tiles,
orig_offset_x,
orig_offset_y,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
clip_result,
new_offset_x,
new_offset_y,
progress);
}
else
{
/* this happens for entire drawables, paths and layer groups */
gimp_item_transform (active_item, context,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
options->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;
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_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_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,
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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