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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 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <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/gimpdrawable-transform.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/gimplayermask.h"
#include "core/gimppickable.h"
#include "core/gimpprogress.h"
#include "core/gimptoolinfo.h"
#include "vectors/gimpvectors.h"
#include "vectors/gimpstroke.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimptooldialog.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimptoolcontrol.h"
#include "gimptransformoptions.h"
#include "gimptransformtool.h"
#include "gimptransformtoolundo.h"
#include "gimp-intl.h"
#define HANDLE_SIZE 25
#define MIN_HANDLE_SIZE 6
static GObject * gimp_transform_tool_constructor (GType type,
guint n_params,
GObjectConstructParam *params);
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,
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_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,
gboolean mask_empty,
GimpDisplay *display);
static void gimp_transform_tool_halt (GimpTransformTool *tr_tool);
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_doit (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool);
static void gimp_transform_tool_grid_recalc (GimpTransformTool *tr_tool);
static void gimp_transform_tool_handles_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_transform_tool_force_expose_preview (GimpTransformTool *tr_tool);
static void gimp_transform_tool_response (GtkWidget *widget,
gint response_id,
GimpTransformTool *tr_tool);
static void gimp_transform_tool_notify_type (GimpTransformOptions *options,
GParamSpec *pspec,
GimpTransformTool *tr_tool);
static void gimp_transform_tool_notify_preview (GimpTransformOptions *options,
GParamSpec *pspec,
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->constructor = gimp_transform_tool_constructor;
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;
draw_class->draw = gimp_transform_tool_draw;
klass->dialog = NULL;
klass->dialog_update = NULL;
klass->prepare = NULL;
klass->motion = NULL;
klass->recalc = NULL;
klass->transform = gimp_transform_tool_real_transform;
}
static void
gimp_transform_tool_init (GimpTransformTool *tr_tool)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
gint i;
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;
tr_tool->original = NULL;
for (i = 0; i < TRANS_INFO_SIZE; i++)
{
tr_tool->trans_info[i] = 0.0;
tr_tool->old_trans_info[i] = 0.0;
}
gimp_matrix3_identity (&tr_tool->transform);
tr_tool->use_grid = FALSE;
tr_tool->use_handles = FALSE;
tr_tool->use_center = FALSE;
tr_tool->use_mid_handles = FALSE;
tr_tool->handle_w = HANDLE_SIZE;
tr_tool->handle_h = HANDLE_SIZE;
tr_tool->ngx = 0;
tr_tool->ngy = 0;
tr_tool->grid_coords = NULL;
tr_tool->tgrid_coords = NULL;
tr_tool->type = GIMP_TRANSFORM_TYPE_LAYER;
tr_tool->direction = GIMP_TRANSFORM_FORWARD;
tr_tool->undo_desc = NULL;
tr_tool->progress_text = _("Transforming");
tr_tool->dialog = NULL;
}
static GObject *
gimp_transform_tool_constructor (GType type,
guint n_params,
GObjectConstructParam *params)
{
GObject *object;
GimpTool *tool;
GimpTransformTool *tr_tool;
GimpTransformOptions *options;
object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);
tool = GIMP_TOOL (object);
tr_tool = GIMP_TRANSFORM_TOOL (object);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
if (tr_tool->use_grid)
{
tr_tool->type = options->type;
tr_tool->direction = options->direction;
g_signal_connect_object (options, "notify::type",
G_CALLBACK (gimp_transform_tool_notify_type),
tr_tool, 0);
g_signal_connect_object (options, "notify::type",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
g_signal_connect_object (options, "notify::direction",
G_CALLBACK (gimp_transform_tool_notify_type),
tr_tool, 0);
g_signal_connect_object (options, "notify::direction",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
g_signal_connect_object (options, "notify::preview-type",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
g_signal_connect_object (options, "notify::grid-type",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
g_signal_connect_object (options, "notify::grid-size",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
g_signal_connect_object (tool->tool_info->tool_options,
"notify::preview-opacity",
G_CALLBACK (gimp_transform_tool_notify_preview),
tr_tool, 0);
}
g_signal_connect_object (options, "notify::constrain",
G_CALLBACK (gimp_transform_tool_dialog_update),
tr_tool, G_CONNECT_SWAPPED);
return object;
}
static void
gimp_transform_tool_finalize (GObject *object)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (object);
if (tr_tool->original)
{
tile_manager_unref (tr_tool->original);
tr_tool->original = NULL;
}
if (tr_tool->dialog)
{
gtk_widget_destroy (tr_tool->dialog);
tr_tool->dialog = NULL;
}
if (tr_tool->grid_coords)
{
g_free (tr_tool->grid_coords);
tr_tool->grid_coords = NULL;
}
if (tr_tool->tgrid_coords)
{
g_free (tr_tool->tgrid_coords);
tr_tool->tgrid_coords = 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);
if (display != tool->display)
{
gint i;
/* Set the pointer to the active display */
tool->display = display;
tool->drawable = gimp_image_get_active_drawable (display->image);
/* 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);
gimp_transform_tool_prepare (tr_tool, display);
/* Recalculate the transform tool */
gimp_transform_tool_recalc (tr_tool, display);
/* start drawing the bounding box and handles... */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
gimp_transform_tool_expose_preview (tr_tool);
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];
}
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 (tr_tool, display);
break;
case GIMP_TOOL_ACTION_HALT:
gimp_transform_tool_halt (tr_tool);
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,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
if (tr_tool->function == TRANSFORM_CREATING)
gimp_transform_tool_oper_update (tool, coords, state, TRUE, display);
tr_tool->lastx = tr_tool->startx = coords->x;
tr_tool->lasty = tr_tool->starty = coords->y;
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;
/* 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));
/* get rid of preview artifacts left outside the drawable's area */
gimp_transform_tool_expose_preview (tr_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, display);
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc (tr_tool, display);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
gimp_tool_control_halt (tool->control);
}
static void
gimp_transform_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformToolClass *tr_tool_class;
/* 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;
tr_tool->state = state;
/* recalculate the tool's transformation matrix */
tr_tool_class = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);
if (tr_tool_class->motion)
{
tr_tool_class->motion (tr_tool, display);
gimp_transform_tool_recalc (tr_tool, display);
gimp_transform_tool_expose_preview (tr_tool);
}
tr_tool->lastx = tr_tool->curx;
tr_tool->lasty = tr_tool->cury;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
#define RESPONSE_RESET 1
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_Return:
case GDK_KP_Enter:
case GDK_ISO_Enter:
gimp_transform_tool_response (NULL, GTK_RESPONSE_OK, trans_tool);
return TRUE;
case GDK_BackSpace:
gimp_transform_tool_response (NULL, RESPONSE_RESET, trans_tool);
return TRUE;
case GDK_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 == GDK_CONTROL_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);
tr_tool->function = TRANSFORM_HANDLE_NONE;
if (display != tool->display)
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;
tr_tool->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;
tr_tool->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;
tr_tool->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;
tr_tool->function = TRANSFORM_HANDLE_SE;
}
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;
if (gimp_draw_tool_on_handle (draw_tool, display,
coords->x, coords->y,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE))
{
tr_tool->function = TRANSFORM_HANDLE_N;
}
x = (tr_tool->tx2 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty2 + tr_tool->ty4) / 2.0;
if (gimp_draw_tool_on_handle (draw_tool, display,
coords->x, coords->y,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE))
{
tr_tool->function = TRANSFORM_HANDLE_E;
}
x = (tr_tool->tx3 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty4) / 2.0;
if (gimp_draw_tool_on_handle (draw_tool, display,
coords->x, coords->y,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE))
{
tr_tool->function = TRANSFORM_HANDLE_S;
}
x = (tr_tool->tx3 + tr_tool->tx1) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty1) / 2.0;
if (gimp_draw_tool_on_handle (draw_tool, display,
coords->x, coords->y,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE))
{
tr_tool->function = TRANSFORM_HANDLE_W;
}
}
}
if (tr_tool->use_center &&
gimp_draw_tool_on_handle (draw_tool, display,
coords->x, coords->y,
GIMP_HANDLE_CIRCLE,
tr_tool->tcx, tr_tool->tcy,
MIN (tr_tool->handle_w, tr_tool->handle_h),
MIN (tr_tool->handle_w, tr_tool->handle_h),
GTK_ANCHOR_CENTER,
FALSE))
{
tr_tool->function = TRANSFORM_HANDLE_CENTER;
}
}
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;
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)
{
case GIMP_TRANSFORM_TYPE_LAYER:
case GIMP_TRANSFORM_TYPE_SELECTION:
break;
case GIMP_TRANSFORM_TYPE_PATH:
if (! gimp_image_get_active_vectors (display->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_draw (GimpDrawTool *draw_tool)
{
GimpTool *tool = GIMP_TOOL (draw_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
gdouble z1, z2, z3, z4;
if (tr_tool->use_grid)
{
/* draw the bounding box */
gimp_draw_tool_draw_line (draw_tool,
tr_tool->tx1, tr_tool->ty1,
tr_tool->tx2, tr_tool->ty2,
FALSE);
gimp_draw_tool_draw_line (draw_tool,
tr_tool->tx2, tr_tool->ty2,
tr_tool->tx4, tr_tool->ty4,
FALSE);
gimp_draw_tool_draw_line (draw_tool,
tr_tool->tx3, tr_tool->ty3,
tr_tool->tx4, tr_tool->ty4,
FALSE);
gimp_draw_tool_draw_line (draw_tool,
tr_tool->tx3, tr_tool->ty3,
tr_tool->tx1, tr_tool->ty1,
FALSE);
/* We test if the transformed polygon is convex.
* if z1 and z2 have the same sign as well as z3 and z4
* the polygon is convex.
*/
z1 = ((tr_tool->tx2 - tr_tool->tx1) * (tr_tool->ty4 - tr_tool->ty1) -
(tr_tool->tx4 - tr_tool->tx1) * (tr_tool->ty2 - tr_tool->ty1));
z2 = ((tr_tool->tx4 - tr_tool->tx1) * (tr_tool->ty3 - tr_tool->ty1) -
(tr_tool->tx3 - tr_tool->tx1) * (tr_tool->ty4 - tr_tool->ty1));
z3 = ((tr_tool->tx4 - tr_tool->tx2) * (tr_tool->ty3 - tr_tool->ty2) -
(tr_tool->tx3 - tr_tool->tx2) * (tr_tool->ty4 - tr_tool->ty2));
z4 = ((tr_tool->tx3 - tr_tool->tx2) * (tr_tool->ty1 - tr_tool->ty2) -
(tr_tool->tx1 - tr_tool->tx2) * (tr_tool->ty3 - tr_tool->ty2));
/* draw the grid */
if (tr_tool->grid_coords &&
tr_tool->tgrid_coords &&
z1 * z2 > 0 &&
z3 * z4 > 0)
{
gint gci, i, k;
k = tr_tool->ngx + tr_tool->ngy;
for (i = 0, gci = 0; i < k; i++, gci += 4)
{
gimp_draw_tool_draw_line (draw_tool,
tr_tool->tgrid_coords[gci],
tr_tool->tgrid_coords[gci + 1],
tr_tool->tgrid_coords[gci + 2],
tr_tool->tgrid_coords[gci + 3],
FALSE);
}
}
}
gimp_transform_tool_handles_recalc (tr_tool, tool->display);
if (tr_tool->use_handles)
{
/* draw the tool handles */
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx1, tr_tool->ty1,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx2, tr_tool->ty2,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx3, tr_tool->ty3,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
tr_tool->tx4, tr_tool->ty4,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
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;
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
x = (tr_tool->tx2 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty2 + tr_tool->ty4) / 2.0;
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
x = (tr_tool->tx3 + tr_tool->tx4) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty4) / 2.0;
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
x = (tr_tool->tx3 + tr_tool->tx1) / 2.0;
y = (tr_tool->ty3 + tr_tool->ty1) / 2.0;
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
x, y,
tr_tool->handle_w, tr_tool->handle_h,
GTK_ANCHOR_CENTER,
FALSE);
}
}
/* draw the center */
if (tr_tool->use_center)
{
gint d = MIN (tr_tool->handle_w, tr_tool->handle_h);
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_CIRCLE,
tr_tool->tcx, tr_tool->tcy,
d, d,
GTK_ANCHOR_CENTER,
FALSE);
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_CROSS,
tr_tool->tcx, tr_tool->tcy,
d, d,
GTK_ANCHOR_CENTER,
FALSE);
}
if (tr_tool->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;
gint num_groups;
gint i;
gimp_channel_boundary (gimp_image_get_mask (tool->display->image),
&orig_in, &orig_out,
&num_segs_in, &num_segs_out,
0, 0, 0, 0);
segs_in = boundary_sort (orig_in, num_segs_in, &num_groups);
num_segs_in += num_groups;
segs_out = boundary_sort (orig_out, num_segs_out, &num_groups);
num_segs_out += num_groups;
if (segs_in)
{
for (i = 0; i < num_segs_in; i++)
{
gdouble tx, ty;
if (segs_in[i].x1 != -1 &&
segs_in[i].y1 != -1 &&
segs_in[i].x2 != -1 &&
segs_in[i].y2 != -1)
{
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_draw_boundary (draw_tool,
segs_in, num_segs_in,
0, 0,
FALSE);
g_free (segs_in);
}
if (segs_out)
{
for (i = 0; i < num_segs_out; i++)
{
gdouble tx, ty;
if (segs_out[i].x1 != -1 &&
segs_out[i].y1 != -1 &&
segs_out[i].x2 != -1 &&
segs_out[i].y2 != -1)
{
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_draw_boundary (draw_tool,
segs_out, num_segs_out,
0, 0,
FALSE);
g_free (segs_out);
}
}
else if (tr_tool->type == GIMP_TRANSFORM_TYPE_PATH)
{
GimpVectors *vectors;
GimpStroke *stroke = NULL;
GimpMatrix3 matrix = tr_tool->transform;
vectors = gimp_image_get_active_vectors (tool->display->image);
if (vectors)
{
if (tr_tool->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_draw_strokes (draw_tool,
&g_array_index (coords,
GimpCoords, 0),
coords->len, FALSE, 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,
gboolean mask_empty,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpProgress *progress;
TileManager *ret = NULL;
if (tr_tool->dialog)
gtk_widget_set_sensitive (tr_tool->dialog, FALSE);
progress = gimp_progress_start (GIMP_PROGRESS (display),
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 (GIMP_IS_LAYER (active_item) &&
gimp_layer_get_mask (GIMP_LAYER (active_item)) &&
mask_empty)
{
GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (active_item));
gimp_item_transform (GIMP_ITEM (mask), context,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
options->clip,
progress);
}
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
case GIMP_TRANSFORM_TYPE_SELECTION:
{
GimpTransformResize clip_result = options->clip;
/* always clip the selction and unfloated channels
* so they keep their size
*/
if (tr_tool->original)
{
if (GIMP_IS_CHANNEL (active_item) &&
tile_manager_bpp (tr_tool->original) == 1)
clip_result = GIMP_TRANSFORM_RESIZE_CLIP;
ret =
gimp_drawable_transform_tiles_affine (GIMP_DRAWABLE (active_item),
context,
tr_tool->original,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
clip_result,
progress);
}
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
gimp_item_transform (active_item, context,
&tr_tool->transform,
options->direction,
options->interpolation,
options->recursion_level,
options->clip,
progress);
break;
}
if (progress)
gimp_progress_end (progress);
return ret;
}
static void
gimp_transform_tool_doit (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpDisplayShell *shell = GIMP_DISPLAY_SHELL (display->shell);
GimpItem *active_item = NULL;
TileManager *new_tiles;
const gchar *message = NULL;
gboolean new_layer;
gboolean mask_empty;
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
active_item = GIMP_ITEM (gimp_image_get_active_drawable (display->image));
message = _("There is no layer to transform.");
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
active_item = GIMP_ITEM (gimp_image_get_mask (display->image));
/* cannot happen, so don't translate this message */
message = "There is no selection to transform.";
break;
case GIMP_TRANSFORM_TYPE_PATH:
active_item = GIMP_ITEM (gimp_image_get_active_vectors (display->image));
message = _("There is no path to transform.");
break;
}
if (! active_item)
{
gimp_tool_message_literal (tool, display, message);
return;
}
gimp_dialog_factory_hide_dialog (tr_tool->dialog);
mask_empty = gimp_channel_is_empty (gimp_image_get_mask (display->image));
gimp_set_busy (display->image->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);
/* Start a transform undo group */
gimp_image_undo_group_start (display->image, GIMP_UNDO_GROUP_TRANSFORM,
tr_tool->undo_desc);
/* With the old UI, if original is NULL, then this is the
* first transformation. In the new UI, it is always so, right?
*/
g_assert (tr_tool->original == NULL);
/* Copy the current selection to the transform tool's private
* selection pointer, so that the original source can be repeatedly
* modified.
*/
tool->drawable = gimp_image_get_active_drawable (display->image);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
tr_tool->original = gimp_drawable_transform_cut (tool->drawable,
context,
&new_layer);
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
tr_tool->original = tile_manager_ref (gimp_drawable_get_tiles (GIMP_DRAWABLE (active_item)));
tile_manager_set_offsets (tr_tool->original, 0, 0);
break;
case GIMP_TRANSFORM_TYPE_PATH:
tr_tool->original = NULL;
break;
}
/* Send the request for the transformation to the tool...
*/
new_tiles = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->transform (tr_tool,
active_item,
mask_empty,
display);
gimp_transform_tool_bounds (tr_tool, display);
gimp_transform_tool_prepare (tr_tool, display);
gimp_transform_tool_recalc (tr_tool, display);
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_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);
}
tile_manager_unref (tr_tool->original);
tr_tool->original = NULL;
break;
case GIMP_TRANSFORM_TYPE_PATH:
/* Nothing to be done */
break;
}
/* Make a note of the new current drawable (since we may have
* a floating selection, etc now.
*/
tool->drawable = gimp_image_get_active_drawable (display->image);
gimp_image_undo_push (display->image, GIMP_TYPE_TRANSFORM_TOOL_UNDO,
GIMP_UNDO_TRANSFORM, NULL,
0,
"transform-tool", tr_tool,
NULL);
/* push the undo group end */
gimp_image_undo_group_end (display->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);
if (gimp_display_shell_get_show_transform (shell))
{
gimp_display_shell_set_show_transform (shell, FALSE);
/* get rid of preview artifacts left outside the drawable's area */
gtk_widget_queue_draw (shell->canvas);
}
gimp_unset_busy (display->image->gimp);
gimp_image_flush (display->image);
gimp_transform_tool_halt (tr_tool);
}
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);
if (tr_tool->grid_coords && tr_tool->tgrid_coords)
{
gint i, k;
gint gci;
gci = 0;
k = (tr_tool->ngx + tr_tool->ngy) * 2;
for (i = 0; i < k; i++)
{
gimp_matrix3_transform_point (&tr_tool->transform,
tr_tool->grid_coords[gci],
tr_tool->grid_coords[gci + 1],
&tr_tool->tgrid_coords[gci],
&tr_tool->tgrid_coords[gci + 1]);
gci += 2;
}
}
}
void
gimp_transform_tool_expose_preview (GimpTransformTool *tr_tool)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
if ((options->preview_type == GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE ||
options->preview_type == GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE_GRID) &&
options->type == GIMP_TRANSFORM_TYPE_LAYER &&
options->direction == GIMP_TRANSFORM_FORWARD)
{
gimp_transform_tool_force_expose_preview (tr_tool);
}
}
static void
gimp_transform_tool_force_expose_preview (GimpTransformTool *tr_tool)
{
static gint last_x = 0;
static gint last_y = 0;
static gint last_w = 0;
static gint last_h = 0;
GimpDisplayShell *shell;
gdouble dx[4], dy[4];
gint area_x, area_y, area_w, area_h;
gint i;
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
if (! tr_tool->use_grid)
return;
/* we might be called as the result of cancelling the transform
* tool dialog, return silently because the draw tool may have
* already been stopped by gimp_transform_tool_halt()
*/
if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
return;
shell = GIMP_DISPLAY_SHELL (GIMP_DRAW_TOOL (tr_tool)->display->shell);
gimp_display_shell_transform_xy_f (shell, tr_tool->tx1, tr_tool->ty1,
dx + 0, dy + 0, FALSE);
gimp_display_shell_transform_xy_f (shell, tr_tool->tx2, tr_tool->ty2,
dx + 1, dy + 1, FALSE);
gimp_display_shell_transform_xy_f (shell, tr_tool->tx3, tr_tool->ty3,
dx + 2, dy + 2, FALSE);
gimp_display_shell_transform_xy_f (shell, tr_tool->tx4, tr_tool->ty4,
dx + 3, dy + 3, FALSE);
/* find bounding box around preview */
area_x = area_w = (gint) dx[0];
area_y = area_h = (gint) dy[0];
for (i = 1; i < 4; i++)
{
if (dx[i] < area_x)
area_x = (gint) dx[i];
else if (dx[i] > area_w)
area_w = (gint) dx[i];
if (dy[i] < area_y)
area_y = (gint) dy[i];
else if (dy[i] > area_h)
area_h = (gint) dy[i];
}
area_w -= area_x;
area_h -= area_y;
gimp_display_shell_expose_area (shell,
MIN (area_x, last_x),
MIN (area_y, last_y),
MAX (area_w, last_w) + ABS (last_x - area_x),
MAX (area_h, last_h) + ABS (last_y - area_y));
/* area of last preview must be re-exposed to avoid leaving artifacts */
last_x = area_x;
last_y = area_y;
last_w = area_w;
last_h = area_h;
}
static void
gimp_transform_tool_halt (GimpTransformTool *tr_tool)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
{
GimpDisplayShell *shell;
shell = GIMP_DISPLAY_SHELL (GIMP_DRAW_TOOL (tr_tool)->display->shell);
if (gimp_display_shell_get_show_transform (shell))
{
gimp_display_shell_set_show_transform (shell, FALSE);
/* get rid of preview artifacts left outside the drawable's area */
gimp_transform_tool_expose_preview (tr_tool);
}
}
if (tr_tool->original)
{
tile_manager_unref (tr_tool->original);
tr_tool->original = NULL;
}
/* inactivate the tool */
tr_tool->function = TRANSFORM_CREATING;
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tr_tool));
if (tr_tool->dialog)
gimp_dialog_factory_hide_dialog (tr_tool->dialog);
tool->display = NULL;
tool->drawable = NULL;
}
static void
gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
g_return_if_fail (GIMP_IS_DISPLAY (display));
/* find the boundaries */
if (tr_tool->original)
{
tile_manager_get_offsets (tr_tool->original, &tr_tool->x1, &tr_tool->y1);
tr_tool->x2 = tr_tool->x1 + tile_manager_width (tr_tool->original);
tr_tool->y2 = tr_tool->y1 + tile_manager_height (tr_tool->original);
}
else
{
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
{
GimpDrawable *drawable;
gint offset_x;
gint offset_y;
drawable = gimp_image_get_active_drawable (display->image);
gimp_item_get_offset (GIMP_ITEM (drawable), &offset_x, &offset_y);
gimp_drawable_mask_bounds (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 (display->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));
/* changing the bounds invalidates any grid we may have */
if (tr_tool->use_grid)
gimp_transform_tool_grid_recalc (tr_tool);
}
static void
gimp_transform_tool_grid_recalc (GimpTransformTool *tr_tool)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
if (tr_tool->grid_coords != NULL)
{
g_free (tr_tool->grid_coords);
tr_tool->grid_coords = NULL;
}
if (tr_tool->tgrid_coords != NULL)
{
g_free (tr_tool->tgrid_coords);
tr_tool->tgrid_coords = NULL;
}
if (options->preview_type != GIMP_TRANSFORM_PREVIEW_TYPE_GRID &&
options->preview_type != GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE_GRID)
return;
switch (options->grid_type)
{
case GIMP_TRANSFORM_GRID_TYPE_N_LINES:
case GIMP_TRANSFORM_GRID_TYPE_SPACING:
{
GimpTool *tool;
gint i, gci;
gdouble *coords;
gint width, height;
width = MAX (1, tr_tool->x2 - tr_tool->x1);
height = MAX (1, tr_tool->y2 - tr_tool->y1);
tool = GIMP_TOOL (tr_tool);
if (options->grid_type == GIMP_TRANSFORM_GRID_TYPE_N_LINES)
{
if (width <= height)
{
tr_tool->ngx = options->grid_size;
tr_tool->ngy = tr_tool->ngx * MAX (1, height / width);
}
else
{
tr_tool->ngy = options->grid_size;
tr_tool->ngx = tr_tool->ngy * MAX (1, width / height);
}
}
else /* GIMP_TRANSFORM_GRID_TYPE_SPACING */
{
gint grid_size = MAX (2, options->grid_size);
tr_tool->ngx = width / grid_size;
tr_tool->ngy = height / grid_size;
}
tr_tool->grid_coords = coords =
g_new (gdouble, (tr_tool->ngx + tr_tool->ngy) * 4);
tr_tool->tgrid_coords =
g_new (gdouble, (tr_tool->ngx + tr_tool->ngy) * 4);
gci = 0;
for (i = 1; i <= tr_tool->ngx; i++)
{
coords[gci] = tr_tool->x1 + (((gdouble) i) / (tr_tool->ngx + 1) *
(tr_tool->x2 - tr_tool->x1));
coords[gci + 1] = tr_tool->y1;
coords[gci + 2] = coords[gci];
coords[gci + 3] = tr_tool->y2;
gci += 4;
}
for (i = 1; i <= tr_tool->ngy; i++)
{
coords[gci] = tr_tool->x1;
coords[gci + 1] = tr_tool->y1 + (((gdouble) i) / (tr_tool->ngy + 1) *
(tr_tool->y2 - tr_tool->y1));
coords[gci + 2] = tr_tool->x2;
coords[gci + 3] = coords[gci + 1];
gci += 4;
}
}
default:
break;
}
}
static void
gimp_transform_tool_handles_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
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_SHELL (display->shell),
tr_tool->tx1, tr_tool->ty1,
&dx1, &dy1,
FALSE);
gimp_display_shell_transform_xy (GIMP_DISPLAY_SHELL (display->shell),
tr_tool->tx2, tr_tool->ty2,
&dx2, &dy2,
FALSE);
gimp_display_shell_transform_xy (GIMP_DISPLAY_SHELL (display->shell),
tr_tool->tx3, tr_tool->ty3,
&dx3, &dy3,
FALSE);
gimp_display_shell_transform_xy (GIMP_DISPLAY_SHELL (display->shell),
tr_tool->tx4, tr_tool->ty4,
&dx4, &dy4,
FALSE);
x1 = MIN (MIN (dx1, dx2), MIN (dx3, dx4));
y1 = MIN (MIN (dy1, dy2), MIN (dy3, dy4));
x2 = MAX (MAX (dx1, dx2), MAX (dx3, dx4));
y2 = MAX (MAX (dy1, dy2), MAX (dy3, dy4));
tr_tool->handle_w = CLAMP ((x2 - x1) / 3, MIN_HANDLE_SIZE, HANDLE_SIZE);
tr_tool->handle_h = CLAMP ((y2 - y1) / 3, MIN_HANDLE_SIZE, HANDLE_SIZE);
}
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,
NULL /* tool->display->shell */,
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)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
gboolean show_transform;
show_transform =
((options->preview_type == GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE ||
options->preview_type == GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE_GRID) &&
options->type == GIMP_TRANSFORM_TYPE_LAYER &&
options->direction == GIMP_TRANSFORM_FORWARD);
gimp_display_shell_set_show_transform (GIMP_DISPLAY_SHELL (display->shell),
show_transform);
if (tr_tool->dialog)
{
GimpDrawable *drawable = gimp_image_get_active_drawable (display->image);
gimp_viewable_dialog_set_viewable (GIMP_VIEWABLE_DIALOG (tr_tool->dialog),
GIMP_VIEWABLE (drawable),
GIMP_CONTEXT (options));
gtk_widget_set_sensitive (tr_tool->dialog, TRUE);
}
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->prepare)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->prepare (tr_tool, display);
}
void
gimp_transform_tool_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_DISPLAY (display));
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc (tr_tool, display);
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 (tr_tool, tool->display);
/* update preview */
gimp_transform_tool_expose_preview (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_doit (tr_tool, tool->display);
break;
default:
gimp_transform_tool_halt (tr_tool);
break;
}
}
static void
gimp_transform_tool_notify_type (GimpTransformOptions *options,
GParamSpec *pspec,
GimpTransformTool *tr_tool)
{
GimpDisplay *display = GIMP_TOOL (tr_tool)->display;
if (tr_tool->function != TRANSFORM_CREATING)
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
tr_tool->type = options->type;
tr_tool->direction = options->direction;
if (tr_tool->function != TRANSFORM_CREATING)
{
if (display)
{
/* reget the selection bounds */
gimp_transform_tool_bounds (tr_tool, display);
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc (tr_tool, display);
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
}
}
static void
gimp_transform_tool_notify_preview (GimpTransformOptions *options,
GParamSpec *pspec,
GimpTransformTool *tr_tool)
{
GimpDisplayShell *shell = NULL;
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tr_tool)))
shell = GIMP_DISPLAY_SHELL (GIMP_DRAW_TOOL (tr_tool)->display->shell);
switch (options->preview_type)
{
default:
case GIMP_TRANSFORM_PREVIEW_TYPE_OUTLINE:
if (shell)
{
gimp_display_shell_set_show_transform (shell, FALSE);
gimp_transform_tool_force_expose_preview (tr_tool);
}
break;
case GIMP_TRANSFORM_PREVIEW_TYPE_GRID:
if (shell)
{
gimp_display_shell_set_show_transform (shell, FALSE);
gimp_transform_tool_force_expose_preview (tr_tool);
}
if (tr_tool->function != TRANSFORM_CREATING)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
gimp_transform_tool_grid_recalc (tr_tool);
gimp_transform_tool_transform_bounding_box (tr_tool);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
}
break;
case GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE:
if (shell)
{
if (options->type == GIMP_TRANSFORM_TYPE_LAYER &&
options->direction == GIMP_TRANSFORM_FORWARD)
gimp_display_shell_set_show_transform (shell, TRUE);
else
gimp_display_shell_set_show_transform (shell, FALSE);
gimp_transform_tool_force_expose_preview (tr_tool);
}
break;
case GIMP_TRANSFORM_PREVIEW_TYPE_IMAGE_GRID:
if (shell)
{
if (options->type == GIMP_TRANSFORM_TYPE_LAYER &&
options->direction == GIMP_TRANSFORM_FORWARD)
gimp_display_shell_set_show_transform (shell, TRUE);
else
gimp_display_shell_set_show_transform (shell, FALSE);
gimp_transform_tool_force_expose_preview (tr_tool);
}
if (tr_tool->function != TRANSFORM_CREATING)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
gimp_transform_tool_grid_recalc (tr_tool);
gimp_transform_tool_transform_bounding_box (tr_tool);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
}
break;
}
}
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