135 lines
5.1 KiB
C
135 lines
5.1 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "paint-types.h"
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#include "gegl/pika-gegl-utils.h"
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#include "core/pika.h"
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#include "core/pika-palettes.h"
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#include "core/pikadrawable.h"
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#include "core/pikadynamics.h"
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#include "core/pikaimage.h"
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#include "core/pikapickable.h"
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#include "core/pikasymmetry.h"
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#include "pikaeraser.h"
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#include "pikaeraseroptions.h"
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#include "pika-intl.h"
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static gboolean pika_eraser_get_color_history_color (PikaPaintbrush *paintbrush,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaRGB *color);
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static void pika_eraser_get_paint_params (PikaPaintbrush *paintbrush,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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gdouble grad_point,
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PikaLayerMode *paint_mode,
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PikaPaintApplicationMode *paint_appl_mode,
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const PikaTempBuf **paint_pixmap,
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PikaRGB *paint_color);
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G_DEFINE_TYPE (PikaEraser, pika_eraser, PIKA_TYPE_PAINTBRUSH)
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void
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pika_eraser_register (Pika *pika,
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PikaPaintRegisterCallback callback)
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{
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(* callback) (pika,
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PIKA_TYPE_ERASER,
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PIKA_TYPE_ERASER_OPTIONS,
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"pika-eraser",
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_("Eraser"),
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"pika-tool-eraser");
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}
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static void
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pika_eraser_class_init (PikaEraserClass *klass)
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{
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PikaPaintbrushClass *paintbrush_class = PIKA_PAINTBRUSH_CLASS (klass);
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paintbrush_class->get_color_history_color = pika_eraser_get_color_history_color;
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paintbrush_class->get_paint_params = pika_eraser_get_paint_params;
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}
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static void
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pika_eraser_init (PikaEraser *eraser)
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{
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}
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static gboolean
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pika_eraser_get_color_history_color (PikaPaintbrush *paintbrush,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaRGB *color)
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{
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/* Erasing on a drawable without alpha is equivalent to
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* drawing with background color. So let's save history.
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*/
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if (! pika_drawable_has_alpha (drawable))
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{
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PikaContext *context = PIKA_CONTEXT (paint_options);
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pika_context_get_background (context, color);
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return TRUE;
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}
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return FALSE;
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}
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static void
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pika_eraser_get_paint_params (PikaPaintbrush *paintbrush,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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gdouble grad_point,
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PikaLayerMode *paint_mode,
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PikaPaintApplicationMode *paint_appl_mode,
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const PikaTempBuf **paint_pixmap,
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PikaRGB *paint_color)
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{
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PikaEraserOptions *options = PIKA_ERASER_OPTIONS (paint_options);
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PikaContext *context = PIKA_CONTEXT (paint_options);
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pika_context_get_background (context, paint_color);
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pika_pickable_srgb_to_image_color (PIKA_PICKABLE (drawable),
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paint_color, paint_color);
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if (options->anti_erase)
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*paint_mode = PIKA_LAYER_MODE_ANTI_ERASE;
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else if (pika_drawable_has_alpha (drawable))
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*paint_mode = PIKA_LAYER_MODE_ERASE;
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else
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*paint_mode = PIKA_LAYER_MODE_NORMAL_LEGACY;
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}
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