mirror of https://github.com/GNOME/gimp.git
457 lines
12 KiB
C
457 lines
12 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 <stdlib.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/gimpimage.h"
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#include "gui/info-dialog.h"
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#include "floating_sel.h"
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#include "gdisplay.h"
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#include "gdisplay_ops.h"
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#include "gimpprogress.h"
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#include "selection.h"
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#include "undo.h"
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#include "pixel_region.h"
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#include "tile_manager.h"
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#include "gimpsheartool.h"
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#include "tool_manager.h"
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#include "tool_options.h"
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#include "transform_options.h"
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#include "libgimp/gimpintl.h"
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#define WANT_SHEAR_BITS
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#include "icons.h"
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/* index into trans_info array */
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#define HORZ_OR_VERT 0
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#define XSHEAR 1
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#define YSHEAR 2
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/* the minimum movement before direction of shear can be determined (pixels) */
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#define MIN_MOVE 5
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/* forward function declarations */
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static void gimp_shear_tool_class_init (GimpShearToolClass *klass);
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static void gimp_shear_tool_init (GimpShearTool *shear_tool);
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static void gimp_shear_tool_destroy (GtkObject *object);
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static TileManager * gimp_shear_tool_transform (GimpTransformTool *transform_tool,
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GDisplay *gdisp,
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TransformState state);
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static void shear_tool_recalc (GimpTool *tool,
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GDisplay *gdisp);
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static void shear_tool_motion (GimpTool *tool,
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GDisplay *gdisp);
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static void shear_info_update (GimpTool *tool);
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static void shear_x_mag_changed (GtkWidget *widget,
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gpointer data);
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static void shear_y_mag_changed (GtkWidget *widget,
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gpointer data);
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/* variables local to this file */
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static gdouble xshear_val;
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static gdouble yshear_val;
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static GimpTransformToolClass *parent_class = NULL;
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static TransformOptions *shear_options = NULL;
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/* Public functions */
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void
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gimp_shear_tool_register (void)
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{
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tool_manager_register_tool (GIMP_TYPE_SHEAR_TOOL,
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FALSE,
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"gimp:shear_tool",
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_("Shear Tool"),
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_("Shear the layer or selection"),
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N_("/Tools/Transform Tools/Shear"), "<shift>F",
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NULL, "tools/shear.html",
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(const gchar **) shear_bits);
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}
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GtkType
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gimp_shear_tool_get_type (void)
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{
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static GtkType tool_type = 0;
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if (! tool_type)
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{
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GtkTypeInfo tool_info =
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{
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"GimpShearTool",
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sizeof (GimpShearTool),
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sizeof (GimpShearToolClass),
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(GtkClassInitFunc) gimp_shear_tool_class_init,
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(GtkObjectInitFunc) gimp_shear_tool_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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tool_type = gtk_type_unique (GIMP_TYPE_TRANSFORM_TOOL, &tool_info);
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}
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return tool_type;
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}
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TileManager *
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gimp_shear_tool_shear (GimpImage *gimage,
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GimpDrawable *drawable,
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GDisplay *gdisp,
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TileManager *float_tiles,
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gboolean interpolation,
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GimpMatrix3 matrix)
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{
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GimpProgress *progress;
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TileManager *ret;
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progress = progress_start (gdisp, _("Shearing..."), FALSE, NULL, NULL);
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ret = gimp_transform_tool_do (gimage, drawable, float_tiles,
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interpolation, matrix,
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progress ? progress_update_and_flush :
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(GimpProgressFunc) NULL,
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progress);
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if (progress)
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progress_end (progress);
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return ret;
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}
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/* private functions */
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static void
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gimp_shear_tool_class_init (GimpShearToolClass *klass)
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{
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GtkObjectClass *object_class;
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GimpTransformToolClass *trans_class;
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object_class = (GtkObjectClass *) klass;
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trans_class = (GimpTransformToolClass *) klass;
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parent_class = gtk_type_class (GIMP_TYPE_TRANSFORM_TOOL);
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object_class->destroy = gimp_shear_tool_destroy;
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trans_class->transform = gimp_shear_tool_transform;
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}
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static void
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gimp_shear_tool_init (GimpShearTool *shear_tool)
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{
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GimpTool *tool;
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GimpTransformTool *tr_tool;
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tool = GIMP_TOOL (shear_tool);
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tr_tool = GIMP_TRANSFORM_TOOL (shear_tool);
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if (! shear_options)
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{
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shear_options = transform_options_new (GIMP_TYPE_SHEAR_TOOL,
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transform_options_reset);
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tool_manager_register_tool_options (GIMP_TYPE_SHEAR_TOOL,
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(ToolOptions *) shear_options);
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}
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tool->tool_cursor = GIMP_SHEAR_TOOL_CURSOR;
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/* assemble the transformation matrix */
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gimp_matrix3_identity (tr_tool->transform);
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}
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static void
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gimp_shear_tool_destroy (GtkObject *object)
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{
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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static TileManager *
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gimp_shear_tool_transform (GimpTransformTool *transform_tool,
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GDisplay *gdisp,
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TransformState state)
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{
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GimpTool *tool;
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tool = GIMP_TOOL (transform_tool);
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switch (state)
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{
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case TRANSFORM_INIT:
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if (!transform_info)
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{
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transform_info = info_dialog_new (_("Shear Information"),
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gimp_standard_help_func,
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"tools/transform_shear.html");
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info_dialog_add_spinbutton (transform_info,
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_("Shear Magnitude X:"),
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&xshear_val,
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-65536, 65536, 1, 15, 1, 1, 0,
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shear_x_mag_changed, tool);
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info_dialog_add_spinbutton (transform_info,
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_("Y:"),
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&yshear_val,
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-65536, 65536, 1, 15, 1, 1, 0,
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shear_y_mag_changed, tool);
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}
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gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), TRUE);
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transform_tool->trans_info[HORZ_OR_VERT] = ORIENTATION_UNKNOWN;
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transform_tool->trans_info[XSHEAR] = 0.0;
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transform_tool->trans_info[YSHEAR] = 0.0;
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return NULL;
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break;
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case TRANSFORM_MOTION:
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shear_tool_motion (tool, gdisp);
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shear_tool_recalc (tool, gdisp);
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break;
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case TRANSFORM_RECALC:
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shear_tool_recalc (tool, gdisp);
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break;
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case TRANSFORM_FINISH:
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gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
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return gimp_shear_tool_shear (gdisp->gimage,
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gimp_image_active_drawable (gdisp->gimage),
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gdisp,
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transform_tool->original,
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gimp_transform_tool_smoothing (),
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transform_tool->transform);
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break;
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}
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return NULL;
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}
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static void
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shear_info_update (GimpTool *tool)
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{
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GimpTransformTool *transform_tool;
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transform_tool = GIMP_TRANSFORM_TOOL (tool);
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xshear_val = transform_tool->trans_info[XSHEAR];
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yshear_val = transform_tool->trans_info[YSHEAR];
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info_dialog_update (transform_info);
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info_dialog_popup (transform_info);
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}
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static void
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shear_x_mag_changed (GtkWidget *widget,
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gpointer data)
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{
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GimpTool *tool;
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GimpDrawTool *draw_tool;
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GimpTransformTool *transform_tool;
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gint value;
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tool = (GimpTool *) data;
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if (tool)
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{
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draw_tool = GIMP_DRAW_TOOL (tool);
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transform_tool = GIMP_TRANSFORM_TOOL (tool);
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value = GTK_ADJUSTMENT (widget)->value;
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if (value != transform_tool->trans_info[XSHEAR])
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{
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gimp_draw_tool_pause (draw_tool);
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transform_tool->trans_info[XSHEAR] = value;
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shear_tool_recalc (tool, tool->gdisp);
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gimp_draw_tool_resume (draw_tool);
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}
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}
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}
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static void
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shear_y_mag_changed (GtkWidget *widget,
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gpointer data)
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{
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GimpTool *tool;
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GimpDrawTool *draw_tool;
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GimpTransformTool *transform_tool;
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gint value;
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tool = (GimpTool *) data;
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if (tool)
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{
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draw_tool = GIMP_DRAW_TOOL (tool);
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transform_tool = GIMP_TRANSFORM_TOOL (tool);
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value = GTK_ADJUSTMENT (widget)->value;
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if (value != transform_tool->trans_info[YSHEAR])
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{
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gimp_draw_tool_pause (draw_tool);
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transform_tool->trans_info[YSHEAR] = value;
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shear_tool_recalc (tool, tool->gdisp);
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gimp_draw_tool_resume (draw_tool);
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}
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}
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}
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static void
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shear_tool_motion (GimpTool *tool,
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GDisplay *gdisp)
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{
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GimpTransformTool *transform_tool;
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gint diffx, diffy;
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gint dir;
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transform_tool = GIMP_TRANSFORM_TOOL (tool);
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diffx = transform_tool->curx - transform_tool->lastx;
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diffy = transform_tool->cury - transform_tool->lasty;
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/* If we haven't yet decided on which way to control shearing
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* decide using the maximum differential
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*/
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if (transform_tool->trans_info[HORZ_OR_VERT] == ORIENTATION_UNKNOWN)
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{
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if (abs (diffx) > MIN_MOVE || abs (diffy) > MIN_MOVE)
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{
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if (abs (diffx) > abs (diffy))
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{
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transform_tool->trans_info[HORZ_OR_VERT] = ORIENTATION_HORIZONTAL;
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transform_tool->trans_info[ORIENTATION_VERTICAL] = 0.0;
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}
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else
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{
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transform_tool->trans_info[HORZ_OR_VERT] = ORIENTATION_VERTICAL;
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transform_tool->trans_info[ORIENTATION_HORIZONTAL] = 0.0;
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}
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}
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/* set the current coords to the last ones */
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else
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{
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transform_tool->curx = transform_tool->lastx;
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transform_tool->cury = transform_tool->lasty;
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}
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}
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/* if the direction is known, keep track of the magnitude */
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if (transform_tool->trans_info[HORZ_OR_VERT] != ORIENTATION_UNKNOWN)
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{
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dir = transform_tool->trans_info[HORZ_OR_VERT];
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switch (transform_tool->function)
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{
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case TRANSFORM_HANDLE_1:
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if (dir == ORIENTATION_HORIZONTAL)
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transform_tool->trans_info[XSHEAR] -= diffx;
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else
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transform_tool->trans_info[YSHEAR] -= diffy;
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break;
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case TRANSFORM_HANDLE_2:
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if (dir == ORIENTATION_HORIZONTAL)
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transform_tool->trans_info[XSHEAR] -= diffx;
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else
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transform_tool->trans_info[YSHEAR] += diffy;
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break;
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case TRANSFORM_HANDLE_3:
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if (dir == ORIENTATION_HORIZONTAL)
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transform_tool->trans_info[XSHEAR] += diffx;
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else
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transform_tool->trans_info[YSHEAR] -= diffy;
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break;
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case TRANSFORM_HANDLE_4:
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if (dir == ORIENTATION_HORIZONTAL)
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transform_tool->trans_info[XSHEAR] += diffx;
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else
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transform_tool->trans_info[YSHEAR] += diffy;
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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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}
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static void
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shear_tool_recalc (GimpTool *tool,
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GDisplay *gdisp)
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{
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GimpTransformTool *transform_tool;
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gfloat width, height;
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gfloat cx, cy;
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transform_tool = GIMP_TRANSFORM_TOOL (tool);
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cx = (transform_tool->x1 + transform_tool->x2) / 2.0;
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cy = (transform_tool->y1 + transform_tool->y2) / 2.0;
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width = transform_tool->x2 - transform_tool->x1;
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height = transform_tool->y2 - transform_tool->y1;
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if (width == 0)
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width = 1;
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if (height == 0)
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height = 1;
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/* assemble the transformation matrix */
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gimp_matrix3_identity (transform_tool->transform);
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gimp_matrix3_translate (transform_tool->transform, -cx, -cy);
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/* shear matrix */
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if (transform_tool->trans_info[HORZ_OR_VERT] == ORIENTATION_HORIZONTAL)
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gimp_matrix3_xshear (transform_tool->transform,
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(float) transform_tool->trans_info [XSHEAR] / height);
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else
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gimp_matrix3_yshear (transform_tool->transform,
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(float) transform_tool->trans_info [YSHEAR] / width);
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gimp_matrix3_translate (transform_tool->transform, +cx, +cy);
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/* transform the bounding box */
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gimp_transform_tool_transform_bounding_box (transform_tool);
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/* update the information dialog */
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shear_info_update (tool);
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}
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