mirror of https://github.com/GNOME/gimp.git
149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/* GIMP - The GNU 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 <gegl.h>
|
|
|
|
#include "libgimpcolor/gimpcolor.h"
|
|
|
|
#include "paint-types.h"
|
|
|
|
#include "base/temp-buf.h"
|
|
|
|
#include "paint-funcs/paint-funcs.h"
|
|
|
|
#include "core/gimp.h"
|
|
#include "core/gimpdrawable.h"
|
|
#include "core/gimpimage.h"
|
|
|
|
#include "gimperaser.h"
|
|
#include "gimperaseroptions.h"
|
|
|
|
#include "gimp-intl.h"
|
|
|
|
|
|
static void gimp_eraser_paint (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GimpPaintState paint_state,
|
|
guint32 time);
|
|
static void gimp_eraser_motion (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options);
|
|
|
|
|
|
G_DEFINE_TYPE (GimpEraser, gimp_eraser, GIMP_TYPE_BRUSH_CORE)
|
|
|
|
|
|
void
|
|
gimp_eraser_register (Gimp *gimp,
|
|
GimpPaintRegisterCallback callback)
|
|
{
|
|
(* callback) (gimp,
|
|
GIMP_TYPE_ERASER,
|
|
GIMP_TYPE_ERASER_OPTIONS,
|
|
"gimp-eraser",
|
|
_("Eraser"),
|
|
"gimp-tool-eraser");
|
|
}
|
|
|
|
static void
|
|
gimp_eraser_class_init (GimpEraserClass *klass)
|
|
{
|
|
GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
|
|
GimpBrushCoreClass *brush_core_class = GIMP_BRUSH_CORE_CLASS (klass);
|
|
|
|
paint_core_class->paint = gimp_eraser_paint;
|
|
|
|
brush_core_class->handles_changing_brush = TRUE;
|
|
}
|
|
|
|
static void
|
|
gimp_eraser_init (GimpEraser *eraser)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gimp_eraser_paint (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GimpPaintState paint_state,
|
|
guint32 time)
|
|
{
|
|
switch (paint_state)
|
|
{
|
|
case GIMP_PAINT_STATE_MOTION:
|
|
gimp_eraser_motion (paint_core, drawable, paint_options);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gimp_eraser_motion (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options)
|
|
{
|
|
GimpEraserOptions *options = GIMP_ERASER_OPTIONS (paint_options);
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpImage *image;
|
|
gdouble opacity;
|
|
TempBuf *area;
|
|
guchar col[MAX_CHANNELS];
|
|
gdouble hardness;
|
|
|
|
image = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
|
|
opacity = gimp_paint_options_get_fade (paint_options, image,
|
|
paint_core->pixel_dist);
|
|
if (opacity == 0.0)
|
|
return;
|
|
|
|
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
|
|
if (! area)
|
|
return;
|
|
|
|
gimp_image_get_background (image, context, gimp_drawable_type (drawable),
|
|
col);
|
|
|
|
/* set the alpha channel */
|
|
col[area->bytes - 1] = OPAQUE_OPACITY;
|
|
|
|
/* color the pixels */
|
|
color_pixels (temp_buf_data (area), col,
|
|
area->width * area->height, area->bytes);
|
|
|
|
opacity *= gimp_paint_options_get_dynamic_opacity (paint_options,
|
|
&paint_core->cur_coords);
|
|
|
|
hardness = gimp_paint_options_get_dynamic_hardness (paint_options,
|
|
&paint_core->cur_coords);
|
|
|
|
gimp_brush_core_paste_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
|
|
MIN (opacity, GIMP_OPACITY_OPAQUE),
|
|
gimp_context_get_opacity (context),
|
|
(options->anti_erase ?
|
|
GIMP_ANTI_ERASE_MODE : GIMP_ERASE_MODE),
|
|
gimp_paint_options_get_brush_mode (paint_options),
|
|
hardness,
|
|
paint_options->application_mode);
|
|
}
|