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gimp/app/tools/gimpperspectivetool.c

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/* The GIMP -- an 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 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 <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "gui/gui-types.h"
#include "core/gimpimage.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimpdrawable-transform-utils.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "gui/info-dialog.h"
#include "gimpperspectivetool.h"
#include "transform_options.h"
#include "libgimp/gimpintl.h"
/* local function prototypes */
static void gimp_perspective_tool_class_init (GimpPerspectiveToolClass *klass);
static void gimp_perspective_tool_init (GimpPerspectiveTool *perspective_tool);
static TileManager * gimp_perspective_tool_transform (GimpTransformTool *transform_tool,
GimpDisplay *gdisp,
TransformState state);
static void perspective_tool_recalc (GimpTransformTool *tr_tool,
GimpDisplay *gdisp);
static void perspective_tool_motion (GimpTransformTool *tr_tool,
GimpDisplay *gdisp);
static void perspective_info_update (GimpTransformTool *tr_tool);
/* storage for information dialog fields */
static gchar matrix_row_buf [3][MAX_INFO_BUF];
static GimpTransformToolClass *parent_class = NULL;
/* public functions */
void
gimp_perspective_tool_register (Gimp *gimp,
GimpToolRegisterCallback callback)
{
(* callback) (gimp,
GIMP_TYPE_PERSPECTIVE_TOOL,
transform_options_new,
FALSE,
"gimp:perspective_tool",
_("Perspective Tool"),
_("Change perspective of the layer or selection"),
N_("/Tools/Transform Tools/Perspective"), "<shift>P",
NULL, "tools/perspective.html",
GIMP_STOCK_TOOL_PERSPECTIVE);
}
GType
gimp_perspective_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpPerspectiveToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_perspective_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPerspectiveTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_perspective_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_TRANSFORM_TOOL,
"GimpPerspectiveTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_perspective_tool_class_init (GimpPerspectiveToolClass *klass)
{
GimpTransformToolClass *trans_class;
trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
trans_class->transform = gimp_perspective_tool_transform;
}
static void
gimp_perspective_tool_init (GimpPerspectiveTool *perspective_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (perspective_tool);
tool->tool_cursor = GIMP_PERSPECTIVE_TOOL_CURSOR;
}
static TileManager *
gimp_perspective_tool_transform (GimpTransformTool *transform_tool,
GimpDisplay *gdisp,
TransformState state)
{
switch (state)
{
case TRANSFORM_INIT:
if (! transform_tool->info_dialog)
{
transform_tool->info_dialog =
info_dialog_new (_("Perspective Transform Information"),
gimp_standard_help_func,
"tools/transform_perspective.html");
gimp_transform_tool_info_dialog_connect (transform_tool,
GIMP_STOCK_TOOL_PERSPECTIVE);
info_dialog_add_label (transform_tool->info_dialog, _("Matrix:"),
matrix_row_buf[0]);
info_dialog_add_label (transform_tool->info_dialog, "",
matrix_row_buf[1]);
info_dialog_add_label (transform_tool->info_dialog, "",
matrix_row_buf[2]);
}
gtk_widget_set_sensitive (GTK_WIDGET (transform_tool->info_dialog->shell),
TRUE);
transform_tool->trans_info[X0] = (gdouble) transform_tool->x1;
transform_tool->trans_info[Y0] = (gdouble) transform_tool->y1;
transform_tool->trans_info[X1] = (gdouble) transform_tool->x2;
transform_tool->trans_info[Y1] = (gdouble) transform_tool->y1;
transform_tool->trans_info[X2] = (gdouble) transform_tool->x1;
transform_tool->trans_info[Y2] = (gdouble) transform_tool->y2;
transform_tool->trans_info[X3] = (gdouble) transform_tool->x2;
transform_tool->trans_info[Y3] = (gdouble) transform_tool->y2;
break;
case TRANSFORM_MOTION:
perspective_tool_motion (transform_tool, gdisp);
perspective_tool_recalc (transform_tool, gdisp);
break;
case TRANSFORM_RECALC:
perspective_tool_recalc (transform_tool, gdisp);
break;
case TRANSFORM_FINISH:
return gimp_transform_tool_transform_tiles (transform_tool,
_("Perspective..."));
break;
}
return NULL;
}
static void
perspective_info_update (GimpTransformTool *transform_tool)
{
gint i;
for (i = 0; i < 3; i++)
{
gchar *p = matrix_row_buf[i];
gint j;
for (j = 0; j < 3; j++)
{
p += g_snprintf (p, MAX_INFO_BUF - (p - matrix_row_buf[i]),
"%10.3g", transform_tool->transform[i][j]);
}
}
info_dialog_update (transform_tool->info_dialog);
info_dialog_popup (transform_tool->info_dialog);
}
static void
perspective_tool_motion (GimpTransformTool *transform_tool,
GimpDisplay *gdisp)
{
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_1:
transform_tool->trans_info[X0] += diff_x;
transform_tool->trans_info[Y0] += diff_y;
break;
case TRANSFORM_HANDLE_2:
transform_tool->trans_info[X1] += diff_x;
transform_tool->trans_info[Y1] += diff_y;
break;
case TRANSFORM_HANDLE_3:
transform_tool->trans_info[X2] += diff_x;
transform_tool->trans_info[Y2] += diff_y;
break;
case TRANSFORM_HANDLE_4:
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
perspective_tool_recalc (GimpTransformTool *transform_tool,
GimpDisplay *gdisp)
{
gimp_drawable_transform_matrix_perspective (transform_tool->x1,
transform_tool->y1,
transform_tool->x2,
transform_tool->y2,
transform_tool->trans_info[X0],
transform_tool->trans_info[Y0],
transform_tool->trans_info[X1],
transform_tool->trans_info[Y1],
transform_tool->trans_info[X2],
transform_tool->trans_info[Y2],
transform_tool->trans_info[X3],
transform_tool->trans_info[Y3],
transform_tool->transform);
/* transform the bounding box */
gimp_transform_tool_transform_bounding_box (transform_tool);
/* update the information dialog */
perspective_info_update (transform_tool);
}
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