PIKApp/app/tools/pikaperspectivetool.c

297 lines
11 KiB
C

/* 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 "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikadisplayshell-transform.h"
#include "display/pikatoolgui.h"
#include "display/pikatooltransformgrid.h"
#include "pikaperspectivetool.h"
#include "pikatoolcontrol.h"
#include "pikatransformgridoptions.h"
#include "pika-intl.h"
/* index into trans_info array */
enum
{
X0,
Y0,
X1,
Y1,
X2,
Y2,
X3,
Y3
};
/* local function prototypes */
static void pika_perspective_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
const PikaMatrix3 *transform);
static void pika_perspective_tool_prepare (PikaTransformGridTool *tg_tool);
static void pika_perspective_tool_readjust (PikaTransformGridTool *tg_tool);
static PikaToolWidget * pika_perspective_tool_get_widget (PikaTransformGridTool *tg_tool);
static void pika_perspective_tool_update_widget (PikaTransformGridTool *tg_tool);
static void pika_perspective_tool_widget_changed (PikaTransformGridTool *tg_tool);
static void pika_perspective_tool_info_to_points (PikaGenericTransformTool *generic);
G_DEFINE_TYPE (PikaPerspectiveTool, pika_perspective_tool,
PIKA_TYPE_GENERIC_TRANSFORM_TOOL)
#define parent_class pika_perspective_tool_parent_class
void
pika_perspective_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_PERSPECTIVE_TOOL,
PIKA_TYPE_TRANSFORM_GRID_OPTIONS,
pika_transform_grid_options_gui,
PIKA_CONTEXT_PROP_MASK_BACKGROUND,
"pika-perspective-tool",
_("Perspective"),
_("Perspective Tool: "
"Change perspective of the layer, selection or path"),
N_("_Perspective"), "<shift>P",
NULL, PIKA_HELP_TOOL_PERSPECTIVE,
PIKA_ICON_TOOL_PERSPECTIVE,
data);
}
static void
pika_perspective_tool_class_init (PikaPerspectiveToolClass *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);
tg_class->matrix_to_info = pika_perspective_tool_matrix_to_info;
tg_class->prepare = pika_perspective_tool_prepare;
tg_class->readjust = pika_perspective_tool_readjust;
tg_class->get_widget = pika_perspective_tool_get_widget;
tg_class->update_widget = pika_perspective_tool_update_widget;
tg_class->widget_changed = pika_perspective_tool_widget_changed;
generic_class->info_to_points = pika_perspective_tool_info_to_points;
tr_class->undo_desc = C_("undo-type", "Perspective");
tr_class->progress_text = _("Perspective transformation");
}
static void
pika_perspective_tool_init (PikaPerspectiveTool *perspective_tool)
{
PikaTool *tool = PIKA_TOOL (perspective_tool);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_PERSPECTIVE);
}
static void
pika_perspective_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
const PikaMatrix3 *transform)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
pika_matrix3_transform_point (transform,
tr_tool->x1,
tr_tool->y1,
&tg_tool->trans_info[X0],
&tg_tool->trans_info[Y0]);
pika_matrix3_transform_point (transform,
tr_tool->x2,
tr_tool->y1,
&tg_tool->trans_info[X1],
&tg_tool->trans_info[Y1]);
pika_matrix3_transform_point (transform,
tr_tool->x1,
tr_tool->y2,
&tg_tool->trans_info[X2],
&tg_tool->trans_info[Y2]);
pika_matrix3_transform_point (transform,
tr_tool->x2,
tr_tool->y2,
&tg_tool->trans_info[X3],
&tg_tool->trans_info[Y3]);
}
static void
pika_perspective_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;
}
static void
pika_perspective_tool_readjust (PikaTransformGridTool *tg_tool)
{
PikaTool *tool = PIKA_TOOL (tg_tool);
PikaDisplayShell *shell = pika_display_get_shell (tool->display);
gdouble x;
gdouble y;
gdouble r;
x = shell->disp_width / 2.0;
y = shell->disp_height / 2.0;
r = MAX (MIN (x, y) / G_SQRT2 -
PIKA_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0,
PIKA_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0);
pika_display_shell_untransform_xy_f (shell,
x - r, y - r,
&tg_tool->trans_info[X0],
&tg_tool->trans_info[Y0]);
pika_display_shell_untransform_xy_f (shell,
x + r, y - r,
&tg_tool->trans_info[X1],
&tg_tool->trans_info[Y1]);
pika_display_shell_untransform_xy_f (shell,
x - r, y + r,
&tg_tool->trans_info[X2],
&tg_tool->trans_info[Y2]);
pika_display_shell_untransform_xy_f (shell,
x + r, y + r,
&tg_tool->trans_info[X3],
&tg_tool->trans_info[Y3]);
}
static PikaToolWidget *
pika_perspective_tool_get_widget (PikaTransformGridTool *tg_tool)
{
PikaTool *tool = PIKA_TOOL (tg_tool);
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
PikaDisplayShell *shell = pika_display_get_shell (tool->display);
PikaToolWidget *widget;
widget = pika_tool_transform_grid_new (shell,
&tr_tool->transform,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2);
g_object_set (widget,
"inside-function", PIKA_TRANSFORM_FUNCTION_PERSPECTIVE,
"outside-function", PIKA_TRANSFORM_FUNCTION_PERSPECTIVE,
"use-perspective-handles", TRUE,
"use-center-handle", TRUE,
NULL);
return widget;
}
static void
pika_perspective_tool_update_widget (PikaTransformGridTool *tg_tool)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
g_object_set (tg_tool->widget,
"x1", (gdouble) tr_tool->x1,
"y1", (gdouble) tr_tool->y1,
"x2", (gdouble) tr_tool->x2,
"y2", (gdouble) tr_tool->y2,
NULL);
}
static void
pika_perspective_tool_widget_changed (PikaTransformGridTool *tg_tool)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
PikaMatrix3 *transform;
g_object_get (tg_tool->widget,
"transform", &transform,
NULL);
pika_matrix3_transform_point (transform,
tr_tool->x1, tr_tool->y1,
&tg_tool->trans_info[X0],
&tg_tool->trans_info[Y0]);
pika_matrix3_transform_point (transform,
tr_tool->x2, tr_tool->y1,
&tg_tool->trans_info[X1],
&tg_tool->trans_info[Y1]);
pika_matrix3_transform_point (transform,
tr_tool->x1, tr_tool->y2,
&tg_tool->trans_info[X2],
&tg_tool->trans_info[Y2]);
pika_matrix3_transform_point (transform,
tr_tool->x2, tr_tool->y2,
&tg_tool->trans_info[X3],
&tg_tool->trans_info[Y3]);
g_free (transform);
PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
}
static void
pika_perspective_tool_info_to_points (PikaGenericTransformTool *generic)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (generic);
PikaTransformGridTool *tg_tool = PIKA_TRANSFORM_GRID_TOOL (generic);
generic->input_points[0] = (PikaVector2) {tr_tool->x1, tr_tool->y1};
generic->input_points[1] = (PikaVector2) {tr_tool->x2, tr_tool->y1};
generic->input_points[2] = (PikaVector2) {tr_tool->x1, tr_tool->y2};
generic->input_points[3] = (PikaVector2) {tr_tool->x2, tr_tool->y2};
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]};
}