mirror of https://github.com/GNOME/gimp.git
265 lines
6.8 KiB
C
265 lines
6.8 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 <stdlib.h>
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#include "appenv.h"
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#include "drawable.h"
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#include "errors.h"
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#include "gdisplay.h"
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#include "paint_funcs.h"
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#include "paint_core.h"
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#include "paint_options.h"
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#include "palette.h"
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#include "eraser.h"
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#include "selection.h"
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#include "tool_options_ui.h"
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#include "tools.h"
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#include "libgimp/gimpintl.h"
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/* the eraser structures */
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typedef struct _EraserOptions EraserOptions;
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struct _EraserOptions
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{
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PaintOptions paint_options;
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gboolean hard;
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gboolean hard_d;
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GtkWidget *hard_w;
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gboolean incremental;
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gboolean incremental_d;
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GtkWidget *incremental_w;
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};
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/* the eraser tool options */
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static EraserOptions *eraser_options = NULL;
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/* local variables */
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static gboolean non_gui_hard;
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static gboolean non_gui_incremental;
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/* forward function declarations */
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static void eraser_motion (PaintCore *, GimpDrawable *,
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gboolean, gboolean);
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/* functions */
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static void
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eraser_options_reset (void)
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{
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EraserOptions *options = eraser_options;
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paint_options_reset ((PaintOptions *) options);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->hard_w),
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options->hard_d);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->incremental_w),
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options->incremental_d);
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}
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static EraserOptions *
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eraser_options_new (void)
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{
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EraserOptions *options;
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GtkWidget *vbox;
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/* the new eraser tool options structure */
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options = (EraserOptions *) g_malloc (sizeof (EraserOptions));
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paint_options_init ((PaintOptions *) options,
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ERASER,
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eraser_options_reset);
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options->hard = options->hard_d = FALSE;
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options->incremental = options->incremental_d = FALSE;
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/* the main vbox */
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vbox = ((ToolOptions *) options)->main_vbox;
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/* the hard toggle */
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options->hard_w = gtk_check_button_new_with_label (_("Hard edge"));
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gtk_box_pack_start (GTK_BOX (vbox), options->hard_w, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (options->hard_w), "toggled",
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(GtkSignalFunc) tool_options_toggle_update,
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&options->hard);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->hard_w),
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options->hard_d);
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gtk_widget_show (options->hard_w);
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/* the incremental toggle */
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options->incremental_w = gtk_check_button_new_with_label (_("Incremental"));
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gtk_box_pack_start (GTK_BOX (vbox), options->incremental_w, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (options->incremental_w), "toggled",
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(GtkSignalFunc) tool_options_toggle_update,
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&options->incremental);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->incremental_w),
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options->incremental_d);
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gtk_widget_show (options->incremental_w);
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return options;
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}
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void *
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eraser_paint_func (PaintCore *paint_core,
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GimpDrawable *drawable,
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int state)
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{
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switch (state)
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{
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case INIT_PAINT :
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break;
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case MOTION_PAINT :
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eraser_motion (paint_core, drawable, eraser_options->hard, eraser_options->incremental);
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break;
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case FINISH_PAINT :
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break;
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default :
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break;
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}
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return NULL;
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}
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Tool *
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tools_new_eraser ()
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{
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Tool * tool;
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PaintCore * private;
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/* The tool options */
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if (! eraser_options)
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{
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eraser_options = eraser_options_new ();
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tools_register (ERASER, (ToolOptions *) eraser_options);
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}
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tool = paint_core_new (ERASER);
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private = (PaintCore *) tool->private;
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private->paint_func = eraser_paint_func;
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return tool;
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}
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void
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tools_free_eraser (tool)
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Tool * tool;
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{
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paint_core_free (tool);
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}
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static void
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eraser_motion (PaintCore *paint_core,
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GimpDrawable *drawable,
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gboolean hard,
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gboolean incremental)
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{
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GImage *gimage;
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gint opacity;
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TempBuf * area;
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unsigned char col[MAX_CHANNELS];
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if (! (gimage = drawable_gimage (drawable)))
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return;
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gimage_get_background (gimage, drawable, col);
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/* Get a region which can be used to paint to */
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if (! (area = paint_core_get_paint_area (paint_core, drawable)))
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return;
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/* set the alpha channel */
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col[area->bytes - 1] = OPAQUE_OPACITY;
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/* color the pixels */
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color_pixels (temp_buf_data (area), col,
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area->width * area->height, area->bytes);
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opacity = 255 * paint_options_get_opacity() * (paint_core->curpressure / 0.5);
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if(opacity > OPAQUE_OPACITY) opacity=OPAQUE_OPACITY;
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/* paste the newly painted canvas to the gimage which is being worked on */
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paint_core_paste_canvas (paint_core, drawable, opacity,
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(int) (PAINT_OPTIONS_GET_OPACITY (eraser_options) * 255),
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ERASE_MODE, hard? HARD : SOFT, incremental ? INCREMENTAL : CONSTANT);
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}
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static void *
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eraser_non_gui_paint_func (PaintCore *paint_core,
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GimpDrawable *drawable,
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int state)
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{
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eraser_motion (paint_core, drawable, non_gui_hard, non_gui_incremental);
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return NULL;
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}
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gboolean
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eraser_non_gui (GimpDrawable *drawable,
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int num_strokes,
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double *stroke_array,
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int hardness,
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int method)
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{
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int i;
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if (paint_core_init (&non_gui_paint_core, drawable,
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stroke_array[0], stroke_array[1]))
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{
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non_gui_hard = hardness;
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non_gui_incremental = method;
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/* Set the paint core's paint func */
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non_gui_paint_core.paint_func = eraser_non_gui_paint_func;
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non_gui_paint_core.startx = non_gui_paint_core.lastx = stroke_array[0];
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non_gui_paint_core.starty = non_gui_paint_core.lasty = stroke_array[1];
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if (num_strokes == 1)
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eraser_non_gui_paint_func (&non_gui_paint_core, drawable, 0);
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for (i = 1; i < num_strokes; i++)
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{
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non_gui_paint_core.curx = stroke_array[i * 2 + 0];
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non_gui_paint_core.cury = stroke_array[i * 2 + 1];
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paint_core_interpolate (&non_gui_paint_core, drawable);
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non_gui_paint_core.lastx = non_gui_paint_core.curx;
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non_gui_paint_core.lasty = non_gui_paint_core.cury;
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}
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/* Finish the painting */
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paint_core_finish (&non_gui_paint_core, drawable, -1);
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/* Cleanup */
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paint_core_cleanup ();
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return TRUE;
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}
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else
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return FALSE;
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}
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