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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 <glib.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "drawable.h"
- #include "gdisplay.h"
- #include "gimage_mask.h"
- #include "info_dialog.h"
- #include "rotate_tool.h"
- #include "selection.h"
- #include "transform_tool.h"
- #include "undo.h"
-
- #include "tile_manager_pvt.h"
-
- #include "libgimp/gimpsizeentry.h"
- #include "libgimp/gimpintl.h"
- #include "libgimp/gimpmath.h"
-
- /* index into trans_info array */
- #define ANGLE 0
- #define REAL_ANGLE 1
- #define CENTER_X 2
- #define CENTER_Y 3
-
- #define EPSILON 0.018 /* ~ 1 degree */
- #define FIFTEEN_DEG (G_PI / 12.0)
-
- /* variables local to this file */
- static gdouble angle_val;
- static gdouble center_vals[2];
-
- /* needed for size update */
- static GtkWidget *sizeentry;
-
- /* forward function declarations */
- static void rotate_tool_recalc (Tool *, void *);
- static void rotate_tool_motion (Tool *, void *);
- static void rotate_info_update (Tool *);
-
- /* callback functions for the info dialog sizeentries */
- static void rotate_angle_changed (GtkWidget *entry, gpointer data);
- static void rotate_center_changed (GtkWidget *entry, gpointer data);
-
- TileManager *
- rotate_tool_transform (Tool *tool,
- gpointer gdisp_ptr,
- TransformState state)
- {
- TransformCore *transform_core;
- GDisplay *gdisp;
- GtkWidget *widget;
- GtkWidget *spinbutton2;
-
- transform_core = (TransformCore *) tool->private;
- gdisp = (GDisplay *) gdisp_ptr;
-
- switch (state)
- {
- case INIT:
- angle_val = 0.0;
- center_vals[0] = transform_core->cx;
- center_vals[1] = transform_core->cy;
-
- if (!transform_info)
- {
- transform_info = info_dialog_new (_("Rotation Information"),
- gimp_standard_help_func,
- "tools/transform_rotate.html");
-
- widget =
- info_dialog_add_spinbutton (transform_info, _("Angle:"),
- &angle_val,
- -180, 180, 1, 15, 1, 1, 2,
- (GtkSignalFunc) rotate_angle_changed,
- tool);
- gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (widget), TRUE);
-
- /* this looks strange (-180, 181), but it works */
- widget = info_dialog_add_scale (transform_info, "", &angle_val,
- -180, 181, 0.01, 0.1, 1, -1,
- (GtkSignalFunc) rotate_angle_changed,
- tool);
- gtk_widget_set_usize (widget, 180, 0);
-
- spinbutton2 =
- info_dialog_add_spinbutton (transform_info, _("Center X:"), NULL,
- -1, 1, 1, 10, 1, 1, 2, NULL, NULL);
- sizeentry =
- info_dialog_add_sizeentry (transform_info, _("Y:"),
- center_vals, 1,
- gdisp->gimage->unit, "%a",
- TRUE, TRUE, FALSE,
- GIMP_SIZE_ENTRY_UPDATE_SIZE,
- rotate_center_changed, tool);
-
- gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
- GTK_SPIN_BUTTON (spinbutton2), NULL);
-
- gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
- 1, 6);
- gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
- 2, 0);
- }
-
- gtk_signal_handler_block_by_data (GTK_OBJECT (sizeentry), tool);
-
- gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry),
- gdisp->gimage->unit);
- if (gdisp->dot_for_dot)
- gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry), GIMP_UNIT_PIXEL);
-
- gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 0,
- gdisp->gimage->xresolution, FALSE);
- gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 1,
- gdisp->gimage->yresolution, FALSE);
-
- gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 0,
- -65536,
- 65536 + gdisp->gimage->width);
- gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 1,
- -65536,
- 65536 + gdisp->gimage->height);
-
- gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 0,
- transform_core->x1, transform_core->x2);
- gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 1,
- transform_core->y1, transform_core->y2);
-
- gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 0,
- center_vals[0]);
- gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 1,
- center_vals[1]);
-
- gtk_widget_set_sensitive (transform_info->shell, TRUE);
-
- gtk_signal_handler_unblock_by_data (GTK_OBJECT (sizeentry), tool);
-
- transform_core->trans_info[ANGLE] = angle_val;
- transform_core->trans_info[REAL_ANGLE] = angle_val;
- transform_core->trans_info[CENTER_X] = center_vals[0];
- transform_core->trans_info[CENTER_Y] = center_vals[1];
-
- return NULL;
- break;
-
- case MOTION:
- rotate_tool_motion (tool, gdisp_ptr);
- rotate_tool_recalc (tool, gdisp_ptr);
- break;
-
- case RECALC:
- rotate_tool_recalc (tool, gdisp_ptr);
- break;
-
- case FINISH:
- gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
- return rotate_tool_rotate (gdisp->gimage,
- gimage_active_drawable (gdisp->gimage),
- gdisp,
- transform_core->trans_info[ANGLE],
- transform_core->original,
- transform_tool_smoothing (),
- transform_core->transform);
- break;
- }
-
- return NULL;
- }
-
- Tool *
- tools_new_rotate_tool (void)
- {
- Tool *tool;
- TransformCore *private;
-
- tool = transform_core_new (ROTATE, TRUE);
-
- private = tool->private;
-
- /* set the rotation specific transformation attributes */
- private->trans_func = rotate_tool_transform;
- private->trans_info[ANGLE] = 0.0;
- private->trans_info[REAL_ANGLE] = 0.0;
- private->trans_info[CENTER_X] = 0.0;
- private->trans_info[CENTER_Y] = 0.0;
-
- /* assemble the transformation matrix */
- gimp_matrix3_identity (private->transform);
-
- return tool;
- }
-
- void
- tools_free_rotate_tool (Tool *tool)
- {
- transform_core_free (tool);
- }
-
- static void
- rotate_info_update (Tool *tool)
- {
- TransformCore *transform_core;
-
- transform_core = (TransformCore *) tool->private;
-
- angle_val = gimp_rad_to_deg (transform_core->trans_info[ANGLE]);
- center_vals[0] = transform_core->cx;
- center_vals[1] = transform_core->cy;
-
- info_dialog_update (transform_info);
- info_dialog_popup (transform_info);
- }
-
- static void
- rotate_angle_changed (GtkWidget *widget,
- gpointer data)
- {
- Tool *tool;
- GDisplay *gdisp;
- TransformCore *transform_core;
- gdouble value;
-
- tool = (Tool *) data;
-
- if (tool)
- {
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- value = gimp_deg_to_rad (GTK_ADJUSTMENT (widget)->value);
-
- if (value != transform_core->trans_info[ANGLE])
- {
- draw_core_pause (transform_core->core, tool);
- transform_core->trans_info[ANGLE] = value;
- rotate_tool_recalc (tool, gdisp);
- draw_core_resume (transform_core->core, tool);
- }
- }
- }
-
- static void
- rotate_center_changed (GtkWidget *widget,
- gpointer data)
- {
- Tool *tool;
- GDisplay *gdisp;
- TransformCore *transform_core;
- gint cx;
- gint cy;
-
- tool = (Tool *) data;
-
- if (tool)
- {
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- cx = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0));
- cy = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1));
-
- if ((cx != transform_core->cx) ||
- (cy != transform_core->cy))
- {
- draw_core_pause (transform_core->core, tool);
- transform_core->cx = cx;
- transform_core->cy = cy;
- rotate_tool_recalc (tool, gdisp);
- draw_core_resume (transform_core->core, tool);
- }
- }
- }
-
- static void
- rotate_tool_motion (Tool *tool,
- void *gdisp_ptr)
- {
- TransformCore *transform_core;
- gdouble angle1, angle2, angle;
- gdouble cx, cy;
- gdouble x1, y1, x2, y2;
-
- transform_core = (TransformCore *) tool->private;
-
- if (transform_core->function == HANDLE_CENTER)
- {
- transform_core->cx = transform_core->curx;
- transform_core->cy = transform_core->cury;
-
- return;
- }
-
- cx = transform_core->cx;
- cy = transform_core->cy;
-
- x1 = transform_core->curx - cx;
- x2 = transform_core->lastx - cx;
- y1 = cy - transform_core->cury;
- y2 = cy - transform_core->lasty;
-
- /* find the first angle */
- angle1 = atan2 (y1, x1);
-
- /* find the angle */
- angle2 = atan2 (y2, x2);
-
- angle = angle2 - angle1;
-
- if (angle > G_PI || angle < -G_PI)
- angle = angle2 - ((angle1 < 0) ? 2.0 * G_PI + angle1 : angle1 - 2.0 * G_PI);
-
- /* increment the transform tool's angle */
- transform_core->trans_info[REAL_ANGLE] += angle;
-
- /* limit the angle to between 0 and 360 degrees */
- if (transform_core->trans_info[REAL_ANGLE] < - G_PI)
- transform_core->trans_info[REAL_ANGLE] =
- 2.0 * G_PI - transform_core->trans_info[REAL_ANGLE];
- else if (transform_core->trans_info[REAL_ANGLE] > G_PI)
- transform_core->trans_info[REAL_ANGLE] =
- transform_core->trans_info[REAL_ANGLE] - 2.0 * G_PI;
-
- /* constrain the angle to 15-degree multiples if ctrl is held down */
- if (transform_core->state & GDK_CONTROL_MASK)
- transform_core->trans_info[ANGLE] =
- FIFTEEN_DEG * (int) ((transform_core->trans_info[REAL_ANGLE] +
- FIFTEEN_DEG / 2.0) /
- FIFTEEN_DEG);
- else
- transform_core->trans_info[ANGLE] = transform_core->trans_info[REAL_ANGLE];
- }
-
- static void
- rotate_tool_recalc (Tool *tool,
- void *gdisp_ptr)
- {
- TransformCore *transform_core;
- GDisplay *gdisp;
- gdouble cx, cy;
-
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- cx = transform_core->cx;
- cy = transform_core->cy;
-
- /* assemble the transformation matrix */
- gimp_matrix3_identity (transform_core->transform);
- gimp_matrix3_translate (transform_core->transform, -cx, -cy);
- gimp_matrix3_rotate (transform_core->transform,
- transform_core->trans_info[ANGLE]);
- gimp_matrix3_translate (transform_core->transform, +cx, +cy);
-
- /* transform the bounding box */
- transform_core_transform_bounding_box (tool);
-
- /* update the information dialog */
- rotate_info_update (tool);
- }
-
- TileManager *
- rotate_tool_rotate (GImage *gimage,
- GimpDrawable *drawable,
- GDisplay *gdisp,
- gdouble angle,
- TileManager *float_tiles,
- gboolean interpolation,
- GimpMatrix3 matrix)
- {
- gimp_progress *progress;
- TileManager *ret;
-
- progress = progress_start (gdisp, _("Rotating..."), FALSE, NULL, NULL);
-
- ret = transform_core_do (gimage, drawable, float_tiles,
- interpolation, matrix,
- progress ? progress_update_and_flush :
- (progress_func_t) NULL,
- progress);
-
- if (progress)
- progress_end (progress);
-
- return ret;
- }
-