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/* 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 <glib-object.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);
GimpPressureOptions *pressure_options = paint_options->pressure_options;
GimpImage *image;
gdouble opacity;
TempBuf *area;
guchar col[MAX_CHANNELS];
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);
if (pressure_options->opacity)
opacity *= PRESSURE_SCALE * paint_core->cur_coords.pressure;
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),
paint_options->application_mode);
}
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