mirror of https://github.com/GNOME/gimp.git
232 lines
7.9 KiB
C
232 lines
7.9 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "tools-types.h"
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#include "core/gimp-transform-utils.h"
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#include "core/gimpimage.h"
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#include "core/gimpdrawable-transform.h"
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#include "core/gimptoolinfo.h"
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#include "widgets/gimphelp-ids.h"
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#include "display/gimpdisplay.h"
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#include "gimpperspectivetool.h"
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#include "gimptoolcontrol.h"
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#include "gimptransformoptions.h"
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#include "gimp-intl.h"
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/* local function prototypes */
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static void gimp_perspective_tool_dialog (GimpTransformTool *tr_tool);
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static void gimp_perspective_tool_dialog_update (GimpTransformTool *tr_tool);
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static void gimp_perspective_tool_prepare (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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static void gimp_perspective_tool_motion (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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static void gimp_perspective_tool_recalc (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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G_DEFINE_TYPE (GimpPerspectiveTool, gimp_perspective_tool,
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GIMP_TYPE_TRANSFORM_TOOL);
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void
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gimp_perspective_tool_register (GimpToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (GIMP_TYPE_PERSPECTIVE_TOOL,
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GIMP_TYPE_TRANSFORM_OPTIONS,
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gimp_transform_options_gui,
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0,
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"gimp-perspective-tool",
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_("Perspective"),
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_("Change perspective of the layer or selection"),
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N_("_Perspective"), "<shift>P",
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NULL, GIMP_HELP_TOOL_PERSPECTIVE,
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GIMP_STOCK_TOOL_PERSPECTIVE,
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data);
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}
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static void
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gimp_perspective_tool_class_init (GimpPerspectiveToolClass *klass)
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{
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GimpTransformToolClass *trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
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trans_class->dialog = gimp_perspective_tool_dialog;
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trans_class->dialog_update = gimp_perspective_tool_dialog_update;
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trans_class->prepare = gimp_perspective_tool_prepare;
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trans_class->motion = gimp_perspective_tool_motion;
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trans_class->recalc = gimp_perspective_tool_recalc;
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}
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static void
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gimp_perspective_tool_init (GimpPerspectiveTool *perspective_tool)
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{
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GimpTool *tool = GIMP_TOOL (perspective_tool);
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GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (perspective_tool);
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gimp_tool_control_set_tool_cursor (tool->control,
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GIMP_TOOL_CURSOR_PERSPECTIVE);
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tr_tool->shell_desc = _("Perspective Transform Information");
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tr_tool->progress_text = _("Perspective");
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}
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static void
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gimp_perspective_tool_dialog (GimpTransformTool *tr_tool)
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{
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GimpPerspectiveTool *perspective = GIMP_PERSPECTIVE_TOOL (tr_tool);
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GtkWidget *frame;
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GtkWidget *table;
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gint x, y;
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frame = gimp_frame_new (_("Transformation Matrix"));
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gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (tr_tool->dialog)->vbox), frame,
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FALSE, FALSE, 0);
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gtk_widget_show (frame);
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table = gtk_table_new (3, 3, FALSE);
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gtk_table_set_row_spacings (GTK_TABLE (table), 2);
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gtk_table_set_col_spacings (GTK_TABLE (table), 2);
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gtk_container_add (GTK_CONTAINER (frame), table);
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gtk_widget_show (table);
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for (y = 0; y < 3; y++)
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for (x = 0; x < 3; x++)
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{
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GtkWidget *label = gtk_label_new (" ");
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gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_RIGHT);
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gtk_label_set_width_chars (GTK_LABEL (label), 12);
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gtk_table_attach (GTK_TABLE (table), label,
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x, x + 1, y, y + 1, GTK_EXPAND, GTK_FILL, 0, 0);
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gtk_widget_show (label);
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perspective->label[y][x] = label;
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}
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}
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static void
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gimp_perspective_tool_dialog_update (GimpTransformTool *tr_tool)
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{
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GimpPerspectiveTool *perspective = GIMP_PERSPECTIVE_TOOL (tr_tool);
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gint x, y;
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for (y = 0; y < 3; y++)
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for (x = 0; x < 3; x++)
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{
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gchar buf[32];
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g_snprintf (buf, sizeof (buf),
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"%10.5f", tr_tool->transform.coeff[y][x]);
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gtk_label_set_text (GTK_LABEL (perspective->label[y][x]), buf);
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}
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gtk_widget_show (tr_tool->dialog);
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}
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static void
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gimp_perspective_tool_prepare (GimpTransformTool *tr_tool,
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GimpDisplay *display)
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{
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tr_tool->trans_info[X0] = (gdouble) tr_tool->x1;
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tr_tool->trans_info[Y0] = (gdouble) tr_tool->y1;
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tr_tool->trans_info[X1] = (gdouble) tr_tool->x2;
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tr_tool->trans_info[Y1] = (gdouble) tr_tool->y1;
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tr_tool->trans_info[X2] = (gdouble) tr_tool->x1;
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tr_tool->trans_info[Y2] = (gdouble) tr_tool->y2;
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tr_tool->trans_info[X3] = (gdouble) tr_tool->x2;
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tr_tool->trans_info[Y3] = (gdouble) tr_tool->y2;
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}
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static void
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gimp_perspective_tool_motion (GimpTransformTool *transform_tool,
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GimpDisplay *display)
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{
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gdouble diff_x, diff_y;
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diff_x = transform_tool->curx - transform_tool->lastx;
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diff_y = transform_tool->cury - transform_tool->lasty;
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switch (transform_tool->function)
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{
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case TRANSFORM_HANDLE_1:
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transform_tool->trans_info[X0] += diff_x;
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transform_tool->trans_info[Y0] += diff_y;
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break;
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case TRANSFORM_HANDLE_2:
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transform_tool->trans_info[X1] += diff_x;
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transform_tool->trans_info[Y1] += diff_y;
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break;
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case TRANSFORM_HANDLE_3:
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transform_tool->trans_info[X2] += diff_x;
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transform_tool->trans_info[Y2] += diff_y;
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break;
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case TRANSFORM_HANDLE_4:
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transform_tool->trans_info[X3] += diff_x;
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transform_tool->trans_info[Y3] += diff_y;
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break;
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case TRANSFORM_HANDLE_CENTER:
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transform_tool->trans_info[X0] += diff_x;
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transform_tool->trans_info[Y0] += diff_y;
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transform_tool->trans_info[X1] += diff_x;
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transform_tool->trans_info[Y1] += diff_y;
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transform_tool->trans_info[X2] += diff_x;
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transform_tool->trans_info[Y2] += diff_y;
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transform_tool->trans_info[X3] += diff_x;
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transform_tool->trans_info[Y3] += diff_y;
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break;
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default:
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break;
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}
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}
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static void
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gimp_perspective_tool_recalc (GimpTransformTool *tr_tool,
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GimpDisplay *display)
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{
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gimp_matrix3_identity (&tr_tool->transform);
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gimp_transform_matrix_perspective (&tr_tool->transform,
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tr_tool->x1,
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tr_tool->y1,
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tr_tool->x2 - tr_tool->x1,
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tr_tool->y2 - tr_tool->y1,
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tr_tool->trans_info[X0],
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tr_tool->trans_info[Y0],
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tr_tool->trans_info[X1],
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tr_tool->trans_info[Y1],
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tr_tool->trans_info[X2],
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tr_tool->trans_info[Y2],
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tr_tool->trans_info[X3],
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tr_tool->trans_info[Y3]);
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}
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