PIKApp/app/tools/pikahandletransformtool.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikadisplay.h"
#include "display/pikatoolhandlegrid.h"
#include "display/pikatoolgui.h"
#include "pikahandletransformoptions.h"
#include "pikahandletransformtool.h"
#include "pikatoolcontrol.h"
#include "pika-intl.h"
/* the transformation is defined by 8 points:
*
* 4 points on the original image and 4 corresponding points on the
* transformed image. The first N_HANDLES points on the transformed
* image are visible as handles.
*
* For these handles, the constants TRANSFORM_HANDLE_N,
* TRANSFORM_HANDLE_S, TRANSFORM_HANDLE_E and TRANSFORM_HANDLE_W are
* used. Actually, it makes no sense to name the handles with north,
* south, east, and west. But this way, we don't need to define even
* more enum constants.
*/
/* index into trans_info array */
enum
{
X0,
Y0,
X1,
Y1,
X2,
Y2,
X3,
Y3,
OX0,
OY0,
OX1,
OY1,
OX2,
OY2,
OX3,
OY3,
N_HANDLES
};
/* local function prototypes */
static void pika_handle_transform_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_handle_transform_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
const PikaMatrix3 *transform);
static void pika_handle_transform_tool_prepare (PikaTransformGridTool *tg_tool);
static PikaToolWidget * pika_handle_transform_tool_get_widget (PikaTransformGridTool *tg_tool);
static void pika_handle_transform_tool_update_widget (PikaTransformGridTool *tg_tool);
static void pika_handle_transform_tool_widget_changed (PikaTransformGridTool *tg_tool);
static void pika_handle_transform_tool_info_to_points (PikaGenericTransformTool *generic);
G_DEFINE_TYPE (PikaHandleTransformTool, pika_handle_transform_tool,
PIKA_TYPE_GENERIC_TRANSFORM_TOOL)
#define parent_class pika_handle_transform_tool_parent_class
void
pika_handle_transform_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_HANDLE_TRANSFORM_TOOL,
PIKA_TYPE_HANDLE_TRANSFORM_OPTIONS,
pika_handle_transform_options_gui,
PIKA_CONTEXT_PROP_MASK_BACKGROUND,
"pika-handle-transform-tool",
_("Handle Transform"),
_("Handle Transform Tool: "
"Deform the layer, selection or path with handles"),
N_("_Handle Transform"), "<shift>L",
NULL, PIKA_HELP_TOOL_HANDLE_TRANSFORM,
PIKA_ICON_TOOL_HANDLE_TRANSFORM,
data);
}
static void
pika_handle_transform_tool_class_init (PikaHandleTransformToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaTransformToolClass *tr_class = PIKA_TRANSFORM_TOOL_CLASS (klass);
PikaTransformGridToolClass *tg_class = PIKA_TRANSFORM_GRID_TOOL_CLASS (klass);
PikaGenericTransformToolClass *generic_class = PIKA_GENERIC_TRANSFORM_TOOL_CLASS (klass);
tool_class->modifier_key = pika_handle_transform_tool_modifier_key;
tg_class->matrix_to_info = pika_handle_transform_tool_matrix_to_info;
tg_class->prepare = pika_handle_transform_tool_prepare;
tg_class->get_widget = pika_handle_transform_tool_get_widget;
tg_class->update_widget = pika_handle_transform_tool_update_widget;
tg_class->widget_changed = pika_handle_transform_tool_widget_changed;
generic_class->info_to_points = pika_handle_transform_tool_info_to_points;
tr_class->undo_desc = C_("undo-type", "Handle transform");
tr_class->progress_text = _("Handle transformation");
}
static void
pika_handle_transform_tool_init (PikaHandleTransformTool *ht_tool)
{
ht_tool->saved_handle_mode = PIKA_HANDLE_MODE_ADD_TRANSFORM;
}
static void
pika_handle_transform_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
PikaHandleTransformTool *ht_tool = PIKA_HANDLE_TRANSFORM_TOOL (tool);
PikaHandleTransformOptions *options;
GdkModifierType shift = pika_get_extend_selection_mask ();
GdkModifierType ctrl = pika_get_constrain_behavior_mask ();
PikaTransformHandleMode handle_mode;
options = PIKA_HANDLE_TRANSFORM_TOOL_GET_OPTIONS (tool);
handle_mode = options->handle_mode;
if (press)
{
if (key == (state & (shift | ctrl)))
{
/* first modifier pressed */
ht_tool->saved_handle_mode = options->handle_mode;
}
}
else
{
if (! (state & (shift | ctrl)))
{
/* last modifier released */
handle_mode = ht_tool->saved_handle_mode;
}
}
if (state & shift)
{
handle_mode = PIKA_HANDLE_MODE_MOVE;
}
else if (state & ctrl)
{
handle_mode = PIKA_HANDLE_MODE_REMOVE;
}
if (handle_mode != options->handle_mode)
{
g_object_set (options,
"handle-mode", handle_mode,
NULL);
}
PIKA_TOOL_CLASS (parent_class)->modifier_key (tool, key, press,
state, display);
}
static void
pika_handle_transform_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
const PikaMatrix3 *transform)
{
pika_matrix3_transform_point (transform,
tg_tool->trans_info[OX0],
tg_tool->trans_info[OY0],
&tg_tool->trans_info[X0],
&tg_tool->trans_info[Y0]);
pika_matrix3_transform_point (transform,
tg_tool->trans_info[OX1],
tg_tool->trans_info[OY1],
&tg_tool->trans_info[X1],
&tg_tool->trans_info[Y1]);
pika_matrix3_transform_point (transform,
tg_tool->trans_info[OX2],
tg_tool->trans_info[OY2],
&tg_tool->trans_info[X2],
&tg_tool->trans_info[Y2]);
pika_matrix3_transform_point (transform,
tg_tool->trans_info[OX3],
tg_tool->trans_info[OY3],
&tg_tool->trans_info[X3],
&tg_tool->trans_info[Y3]);
}
static void
pika_handle_transform_tool_prepare (PikaTransformGridTool *tg_tool)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->prepare (tg_tool);
tg_tool->trans_info[X0] = (gdouble) tr_tool->x1;
tg_tool->trans_info[Y0] = (gdouble) tr_tool->y1;
tg_tool->trans_info[X1] = (gdouble) tr_tool->x2;
tg_tool->trans_info[Y1] = (gdouble) tr_tool->y1;
tg_tool->trans_info[X2] = (gdouble) tr_tool->x1;
tg_tool->trans_info[Y2] = (gdouble) tr_tool->y2;
tg_tool->trans_info[X3] = (gdouble) tr_tool->x2;
tg_tool->trans_info[Y3] = (gdouble) tr_tool->y2;
tg_tool->trans_info[OX0] = (gdouble) tr_tool->x1;
tg_tool->trans_info[OY0] = (gdouble) tr_tool->y1;
tg_tool->trans_info[OX1] = (gdouble) tr_tool->x2;
tg_tool->trans_info[OY1] = (gdouble) tr_tool->y1;
tg_tool->trans_info[OX2] = (gdouble) tr_tool->x1;
tg_tool->trans_info[OY2] = (gdouble) tr_tool->y2;
tg_tool->trans_info[OX3] = (gdouble) tr_tool->x2;
tg_tool->trans_info[OY3] = (gdouble) tr_tool->y2;
tg_tool->trans_info[N_HANDLES] = 0;
}
static PikaToolWidget *
pika_handle_transform_tool_get_widget (PikaTransformGridTool *tg_tool)
{
PikaTool *tool = PIKA_TOOL (tg_tool);
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
PikaHandleTransformOptions *options;
PikaDisplayShell *shell = pika_display_get_shell (tool->display);
PikaToolWidget *widget;
options = PIKA_HANDLE_TRANSFORM_TOOL_GET_OPTIONS (tg_tool);
widget = pika_tool_handle_grid_new (shell,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2);
g_object_set (widget,
"n-handles", (gint) tg_tool->trans_info[N_HANDLES],
"orig-x1", tg_tool->trans_info[OX0],
"orig-y1", tg_tool->trans_info[OY0],
"orig-x2", tg_tool->trans_info[OX1],
"orig-y2", tg_tool->trans_info[OY1],
"orig-x3", tg_tool->trans_info[OX2],
"orig-y3", tg_tool->trans_info[OY2],
"orig-x4", tg_tool->trans_info[OX3],
"orig-y4", tg_tool->trans_info[OY3],
"trans-x1", tg_tool->trans_info[X0],
"trans-y1", tg_tool->trans_info[Y0],
"trans-x2", tg_tool->trans_info[X1],
"trans-y2", tg_tool->trans_info[Y1],
"trans-x3", tg_tool->trans_info[X2],
"trans-y3", tg_tool->trans_info[Y2],
"trans-x4", tg_tool->trans_info[X3],
"trans-y4", tg_tool->trans_info[Y3],
NULL);
g_object_bind_property (G_OBJECT (options), "handle-mode",
G_OBJECT (widget), "handle-mode",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
return widget;
}
static void
pika_handle_transform_tool_update_widget (PikaTransformGridTool *tg_tool)
{
PikaMatrix3 transform;
gboolean transform_valid;
PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
transform_valid = pika_transform_grid_tool_info_to_matrix (tg_tool,
&transform);
g_object_set (tg_tool->widget,
"show-guides", transform_valid,
"n-handles", (gint) tg_tool->trans_info[N_HANDLES],
"orig-x1", tg_tool->trans_info[OX0],
"orig-y1", tg_tool->trans_info[OY0],
"orig-x2", tg_tool->trans_info[OX1],
"orig-y2", tg_tool->trans_info[OY1],
"orig-x3", tg_tool->trans_info[OX2],
"orig-y3", tg_tool->trans_info[OY2],
"orig-x4", tg_tool->trans_info[OX3],
"orig-y4", tg_tool->trans_info[OY3],
"trans-x1", tg_tool->trans_info[X0],
"trans-y1", tg_tool->trans_info[Y0],
"trans-x2", tg_tool->trans_info[X1],
"trans-y2", tg_tool->trans_info[Y1],
"trans-x3", tg_tool->trans_info[X2],
"trans-y3", tg_tool->trans_info[Y2],
"trans-x4", tg_tool->trans_info[X3],
"trans-y4", tg_tool->trans_info[Y3],
NULL);
}
static void
pika_handle_transform_tool_widget_changed (PikaTransformGridTool *tg_tool)
{
gint n_handles;
g_object_get (tg_tool->widget,
"n-handles", &n_handles,
"orig-x1", &tg_tool->trans_info[OX0],
"orig-y1", &tg_tool->trans_info[OY0],
"orig-x2", &tg_tool->trans_info[OX1],
"orig-y2", &tg_tool->trans_info[OY1],
"orig-x3", &tg_tool->trans_info[OX2],
"orig-y3", &tg_tool->trans_info[OY2],
"orig-x4", &tg_tool->trans_info[OX3],
"orig-y4", &tg_tool->trans_info[OY3],
"trans-x1", &tg_tool->trans_info[X0],
"trans-y1", &tg_tool->trans_info[Y0],
"trans-x2", &tg_tool->trans_info[X1],
"trans-y2", &tg_tool->trans_info[Y1],
"trans-x3", &tg_tool->trans_info[X2],
"trans-y3", &tg_tool->trans_info[Y2],
"trans-x4", &tg_tool->trans_info[X3],
"trans-y4", &tg_tool->trans_info[Y3],
NULL);
tg_tool->trans_info[N_HANDLES] = n_handles;
PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
}
static void
pika_handle_transform_tool_info_to_points (PikaGenericTransformTool *generic)
{
PikaTransformGridTool *tg_tool = PIKA_TRANSFORM_GRID_TOOL (generic);
generic->input_points[0] = (PikaVector2) {tg_tool->trans_info[OX0],
tg_tool->trans_info[OY0]};
generic->input_points[1] = (PikaVector2) {tg_tool->trans_info[OX1],
tg_tool->trans_info[OY1]};
generic->input_points[2] = (PikaVector2) {tg_tool->trans_info[OX2],
tg_tool->trans_info[OY2]};
generic->input_points[3] = (PikaVector2) {tg_tool->trans_info[OX3],
tg_tool->trans_info[OY3]};
generic->output_points[0] = (PikaVector2) {tg_tool->trans_info[X0],
tg_tool->trans_info[Y0]};
generic->output_points[1] = (PikaVector2) {tg_tool->trans_info[X1],
tg_tool->trans_info[Y1]};
generic->output_points[2] = (PikaVector2) {tg_tool->trans_info[X2],
tg_tool->trans_info[Y2]};
generic->output_points[3] = (PikaVector2) {tg_tool->trans_info[X3],
tg_tool->trans_info[Y3]};
}