gimp/app/tools/gimpperspectivetool.c

235 lines
8.0 KiB
C

/* GIMP - The GNU Image Manipulation Program
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp-transform-utils.h"
#include "core/gimpimage.h"
#include "core/gimpdrawable-transform.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpperspectivetool.h"
#include "gimptoolcontrol.h"
#include "gimptransformoptions.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_perspective_tool_dialog (GimpTransformTool *tr_tool);
static void gimp_perspective_tool_dialog_update (GimpTransformTool *tr_tool);
static void gimp_perspective_tool_prepare (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_perspective_tool_motion (GimpTransformTool *tr_tool,
GimpDisplay *display);
static void gimp_perspective_tool_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display);
G_DEFINE_TYPE (GimpPerspectiveTool, gimp_perspective_tool,
GIMP_TYPE_TRANSFORM_TOOL)
void
gimp_perspective_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_PERSPECTIVE_TOOL,
GIMP_TYPE_TRANSFORM_OPTIONS,
gimp_transform_options_gui,
GIMP_CONTEXT_BACKGROUND_MASK,
"gimp-perspective-tool",
_("Perspective"),
_("Perspective Tool: "
"Change perspective of the layer, selection or path"),
N_("_Perspective"), "<shift>P",
NULL, GIMP_HELP_TOOL_PERSPECTIVE,
GIMP_STOCK_TOOL_PERSPECTIVE,
data);
}
static void
gimp_perspective_tool_class_init (GimpPerspectiveToolClass *klass)
{
GimpTransformToolClass *trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
trans_class->dialog = gimp_perspective_tool_dialog;
trans_class->dialog_update = gimp_perspective_tool_dialog_update;
trans_class->prepare = gimp_perspective_tool_prepare;
trans_class->motion = gimp_perspective_tool_motion;
trans_class->recalc = gimp_perspective_tool_recalc;
}
static void
gimp_perspective_tool_init (GimpPerspectiveTool *perspective_tool)
{
GimpTool *tool = GIMP_TOOL (perspective_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (perspective_tool);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_PERSPECTIVE);
tr_tool->undo_desc = C_("command", "Perspective");
tr_tool->progress_text = _("Perspective transformation");
tr_tool->use_grid = TRUE;
tr_tool->use_handles = TRUE;
tr_tool->use_center = TRUE;
}
static void
gimp_perspective_tool_dialog (GimpTransformTool *tr_tool)
{
GimpPerspectiveTool *perspective = GIMP_PERSPECTIVE_TOOL (tr_tool);
GtkWidget *frame;
GtkWidget *table;
gint x, y;
frame = gimp_frame_new (_("Transformation Matrix"));
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (tr_tool->dialog))),
frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (3, 3, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_table_set_col_spacings (GTK_TABLE (table), 2);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
for (y = 0; y < 3; y++)
for (x = 0; x < 3; x++)
{
GtkWidget *label = gtk_label_new (" ");
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_RIGHT);
gtk_label_set_width_chars (GTK_LABEL (label), 12);
gtk_table_attach (GTK_TABLE (table), label,
x, x + 1, y, y + 1, GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (label);
perspective->label[y][x] = label;
}
}
static void
gimp_perspective_tool_dialog_update (GimpTransformTool *tr_tool)
{
GimpPerspectiveTool *perspective = GIMP_PERSPECTIVE_TOOL (tr_tool);
gint x, y;
for (y = 0; y < 3; y++)
for (x = 0; x < 3; x++)
{
gchar buf[32];
g_snprintf (buf, sizeof (buf),
"%10.5f", tr_tool->transform.coeff[y][x]);
gtk_label_set_text (GTK_LABEL (perspective->label[y][x]), buf);
}
}
static void
gimp_perspective_tool_prepare (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
tr_tool->trans_info[X0] = (gdouble) tr_tool->x1;
tr_tool->trans_info[Y0] = (gdouble) tr_tool->y1;
tr_tool->trans_info[X1] = (gdouble) tr_tool->x2;
tr_tool->trans_info[Y1] = (gdouble) tr_tool->y1;
tr_tool->trans_info[X2] = (gdouble) tr_tool->x1;
tr_tool->trans_info[Y2] = (gdouble) tr_tool->y2;
tr_tool->trans_info[X3] = (gdouble) tr_tool->x2;
tr_tool->trans_info[Y3] = (gdouble) tr_tool->y2;
}
static void
gimp_perspective_tool_motion (GimpTransformTool *transform_tool,
GimpDisplay *display)
{
gdouble diff_x, diff_y;
diff_x = transform_tool->curx - transform_tool->lastx;
diff_y = transform_tool->cury - transform_tool->lasty;
switch (transform_tool->function)
{
case TRANSFORM_HANDLE_NW:
transform_tool->trans_info[X0] += diff_x;
transform_tool->trans_info[Y0] += diff_y;
break;
case TRANSFORM_HANDLE_NE:
transform_tool->trans_info[X1] += diff_x;
transform_tool->trans_info[Y1] += diff_y;
break;
case TRANSFORM_HANDLE_SW:
transform_tool->trans_info[X2] += diff_x;
transform_tool->trans_info[Y2] += diff_y;
break;
case TRANSFORM_HANDLE_SE:
transform_tool->trans_info[X3] += diff_x;
transform_tool->trans_info[Y3] += diff_y;
break;
case TRANSFORM_HANDLE_CENTER:
transform_tool->trans_info[X0] += diff_x;
transform_tool->trans_info[Y0] += diff_y;
transform_tool->trans_info[X1] += diff_x;
transform_tool->trans_info[Y1] += diff_y;
transform_tool->trans_info[X2] += diff_x;
transform_tool->trans_info[Y2] += diff_y;
transform_tool->trans_info[X3] += diff_x;
transform_tool->trans_info[Y3] += diff_y;
break;
default:
break;
}
}
static void
gimp_perspective_tool_recalc (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
gimp_matrix3_identity (&tr_tool->transform);
gimp_transform_matrix_perspective (&tr_tool->transform,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2 - tr_tool->x1,
tr_tool->y2 - tr_tool->y1,
tr_tool->trans_info[X0],
tr_tool->trans_info[Y0],
tr_tool->trans_info[X1],
tr_tool->trans_info[Y1],
tr_tool->trans_info[X2],
tr_tool->trans_info[Y2],
tr_tool->trans_info[X3],
tr_tool->trans_info[Y3]);
}