598 lines
22 KiB
C
598 lines
22 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 "libpikamath/pikamath.h"
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#include "paint-types.h"
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#include "gegl/pika-gegl-loops.h"
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#include "gegl/pika-gegl-utils.h"
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#include "core/pika-palettes.h"
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#include "core/pikabrush.h"
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#include "core/pikabrush-header.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 "core/pikatempbuf.h"
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#include "pikasmudge.h"
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#include "pikasmudgeoptions.h"
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#include "pika-intl.h"
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static void pika_smudge_finalize (GObject *object);
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static void pika_smudge_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time);
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static gboolean pika_smudge_start (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym);
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static void pika_smudge_motion (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym);
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static void pika_smudge_accumulator_coords (PikaPaintCore *paint_core,
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const PikaCoords *coords,
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gint stroke,
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gint *x,
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gint *y);
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static void pika_smudge_accumulator_size (PikaPaintOptions *paint_options,
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const PikaCoords *coords,
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gint *accumulator_size);
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G_DEFINE_TYPE (PikaSmudge, pika_smudge, PIKA_TYPE_BRUSH_CORE)
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#define parent_class pika_smudge_parent_class
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void
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pika_smudge_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_SMUDGE,
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PIKA_TYPE_SMUDGE_OPTIONS,
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"pika-smudge",
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_("Smudge"),
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"pika-tool-smudge");
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}
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static void
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pika_smudge_class_init (PikaSmudgeClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
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PikaBrushCoreClass *brush_core_class = PIKA_BRUSH_CORE_CLASS (klass);
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object_class->finalize = pika_smudge_finalize;
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paint_core_class->paint = pika_smudge_paint;
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brush_core_class->handles_changing_brush = TRUE;
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brush_core_class->handles_transforming_brush = TRUE;
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brush_core_class->handles_dynamic_transforming_brush = TRUE;
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}
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static void
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pika_smudge_init (PikaSmudge *smudge)
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{
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}
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static void
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pika_smudge_finalize (GObject *object)
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{
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PikaSmudge *smudge = PIKA_SMUDGE (object);
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if (smudge->accum_buffers)
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{
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GList *iter;
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for (iter = smudge->accum_buffers; iter; iter = g_list_next (iter))
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{
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if (iter->data)
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g_object_unref (iter->data);
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}
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g_list_free (smudge->accum_buffers);
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smudge->accum_buffers = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_smudge_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time)
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{
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PikaSmudge *smudge = PIKA_SMUDGE (paint_core);
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g_return_if_fail (g_list_length (drawables) == 1);
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switch (paint_state)
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{
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case PIKA_PAINT_STATE_INIT:
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{
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PikaContext *context = PIKA_CONTEXT (paint_options);
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PikaSmudgeOptions *options = PIKA_SMUDGE_OPTIONS (paint_options);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
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PikaDynamics *dynamics = pika_context_get_dynamics (context);
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/* Don't add to color history when
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* 1. pure smudging (flow=0)
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* 2. color is from gradient or pixmap brushes
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*/
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if (options->flow > 0.0 &&
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! pika_dynamics_is_output_enabled (dynamics, PIKA_DYNAMICS_OUTPUT_COLOR) &&
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! (brush_core->brush && pika_brush_get_pixmap (brush_core->brush)))
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{
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PikaRGB foreground;
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pika_context_get_foreground (context, &foreground);
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pika_palettes_add_color_history (context->pika, &foreground);
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}
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}
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break;
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case PIKA_PAINT_STATE_MOTION:
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/* initialization fails if the user starts outside the drawable */
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if (! smudge->initialized)
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smudge->initialized = pika_smudge_start (paint_core, drawables->data,
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paint_options, sym);
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if (smudge->initialized)
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pika_smudge_motion (paint_core, drawables->data, paint_options, sym);
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break;
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case PIKA_PAINT_STATE_FINISH:
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if (smudge->accum_buffers)
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{
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GList *iter;
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for (iter = smudge->accum_buffers; iter; iter = g_list_next (iter))
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{
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if (iter->data)
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g_object_unref (iter->data);
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}
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g_list_free (smudge->accum_buffers);
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smudge->accum_buffers = NULL;
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}
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smudge->initialized = FALSE;
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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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static gboolean
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pika_smudge_start (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym)
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{
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PikaSmudge *smudge = PIKA_SMUDGE (paint_core);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
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PikaSmudgeOptions *options = PIKA_SMUDGE_OPTIONS (paint_options);
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PikaPickable *dest_pickable;
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GeglBuffer *pickable_buffer;
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GeglBuffer *paint_buffer;
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PikaCoords coords;
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gint dest_pickable_off_x;
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gint dest_pickable_off_y;
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gint paint_buffer_x;
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gint paint_buffer_y;
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gint accum_size;
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gint n_strokes;
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gint i;
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gint x, y;
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gint off_x, off_y;
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coords = *(pika_symmetry_get_origin (sym));
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pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y);
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coords.x -= off_x;
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coords.y -= off_y;
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pika_brush_core_eval_transform_dynamics (brush_core,
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pika_item_get_image (PIKA_ITEM (drawable)),
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paint_options,
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&coords);
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if (options->sample_merged)
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{
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dest_pickable = pika_paint_core_get_image_pickable (paint_core);
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pika_item_get_offset (PIKA_ITEM (drawable),
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&dest_pickable_off_x,
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&dest_pickable_off_y);
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}
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else
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{
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dest_pickable = PIKA_PICKABLE (drawable);
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dest_pickable_off_x = 0;
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dest_pickable_off_y = 0;
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}
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pickable_buffer = pika_pickable_get_buffer (dest_pickable);
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n_strokes = pika_symmetry_get_size (sym);
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for (i = 0; i < n_strokes; i++)
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{
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GeglBuffer *accum_buffer;
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coords = *(pika_symmetry_get_coords (sym, i));
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coords.x -= off_x;
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coords.y -= off_y;
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pika_smudge_accumulator_size (paint_options, &coords, &accum_size);
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/* Allocate the accumulation buffer */
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accum_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
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accum_size,
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accum_size),
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babl_format ("RGBA float"));
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smudge->accum_buffers = g_list_prepend (smudge->accum_buffers,
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accum_buffer);
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/* adjust the x and y coordinates to the upper left corner of the
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* accumulator
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*/
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paint_buffer = pika_paint_core_get_paint_buffer (paint_core, drawable,
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paint_options,
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PIKA_LAYER_MODE_NORMAL,
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&coords,
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&paint_buffer_x,
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&paint_buffer_y,
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NULL, NULL);
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if (! paint_buffer)
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continue;
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pika_smudge_accumulator_coords (paint_core, &coords, 0, &x, &y);
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/* If clipped, prefill the smudge buffer with the color at the
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* brush position.
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*/
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if (x != paint_buffer_x ||
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y != paint_buffer_y ||
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accum_size != gegl_buffer_get_width (paint_buffer) ||
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accum_size != gegl_buffer_get_height (paint_buffer))
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{
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gfloat pixel[4];
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GeglColor *color;
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gint pick_x;
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gint pick_y;
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pick_x = CLAMP ((gint) coords.x + dest_pickable_off_x,
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0,
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gegl_buffer_get_width (pickable_buffer) - 1);
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pick_y = CLAMP ((gint) coords.y + dest_pickable_off_y,
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0,
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gegl_buffer_get_height (pickable_buffer) - 1);
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pika_pickable_get_pixel_at (dest_pickable,
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pick_x, pick_y,
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babl_format ("RGBA float"),
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pixel);
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color = gegl_color_new (NULL);
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gegl_color_set_pixel (color, babl_format ("RGBA float"), pixel);
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gegl_buffer_set_color (accum_buffer, NULL, color);
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g_object_unref (color);
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}
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/* copy the region under the original painthit. */
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pika_gegl_buffer_copy
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(pickable_buffer,
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GEGL_RECTANGLE (paint_buffer_x + dest_pickable_off_x,
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paint_buffer_y + dest_pickable_off_y,
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gegl_buffer_get_width (paint_buffer),
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gegl_buffer_get_height (paint_buffer)),
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GEGL_ABYSS_NONE,
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accum_buffer,
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GEGL_RECTANGLE (paint_buffer_x - x,
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paint_buffer_y - y,
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0, 0));
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}
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smudge->accum_buffers = g_list_reverse (smudge->accum_buffers);
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return TRUE;
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}
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static void
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pika_smudge_motion (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym)
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{
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PikaSmudge *smudge = PIKA_SMUDGE (paint_core);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
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PikaSmudgeOptions *options = PIKA_SMUDGE_OPTIONS (paint_options);
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PikaContext *context = PIKA_CONTEXT (paint_options);
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PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
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PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
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PikaPickable *dest_pickable;
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GeglBuffer *paint_buffer;
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gint dest_pickable_off_x;
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gint dest_pickable_off_y;
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gint paint_buffer_x;
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gint paint_buffer_y;
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gint paint_buffer_width;
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gint paint_buffer_height;
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/* brush dynamics */
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gdouble fade_point;
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gdouble opacity;
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gdouble rate;
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gdouble flow;
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gdouble grad_point;
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/* brush color */
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PikaRGB brush_color;
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PikaRGB *brush_color_ptr; /* whether use single color or pixmap */
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/* accum buffer */
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gint x, y;
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GeglBuffer *accum_buffer;
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/* other variables */
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gdouble force;
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PikaCoords coords;
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gint off_x, off_y;
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gint paint_width, paint_height;
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gint n_strokes;
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gint i;
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if (options->sample_merged)
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{
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dest_pickable = pika_paint_core_get_image_pickable (paint_core);
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pika_item_get_offset (PIKA_ITEM (drawable),
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&dest_pickable_off_x,
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&dest_pickable_off_y);
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}
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else
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{
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dest_pickable = PIKA_PICKABLE (drawable);
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dest_pickable_off_x = 0;
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dest_pickable_off_y = 0;
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}
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fade_point = pika_paint_options_get_fade (paint_options, image,
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paint_core->pixel_dist);
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pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y);
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coords = *(pika_symmetry_get_origin (sym));
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coords.x -= off_x;
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coords.y -= off_y;
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pika_symmetry_set_origin (sym, drawable, &coords);
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paint_core->sym = sym;
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opacity = pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_OPACITY,
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&coords,
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paint_options,
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fade_point);
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if (opacity == 0.0)
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return;
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pika_brush_core_eval_transform_dynamics (brush_core,
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image,
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paint_options,
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&coords);
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/* Get brush dynamic values other than opacity */
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rate = ((options->rate / 100.0) *
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pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_RATE,
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&coords,
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paint_options,
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fade_point));
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flow = ((options->flow / 100.0) *
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pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_FLOW,
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&coords,
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paint_options,
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fade_point));
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grad_point = pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_COLOR,
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&coords,
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paint_options,
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fade_point);
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/* Get current gradient color, brush pixmap, or foreground color */
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brush_color_ptr = &brush_color;
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if (pika_paint_options_get_gradient_color (paint_options, image,
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grad_point,
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paint_core->pixel_dist,
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&brush_color))
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{
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/* No more processing needed */
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}
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else if (brush_core->brush && pika_brush_get_pixmap (brush_core->brush))
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{
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brush_color_ptr = NULL;
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}
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else
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{
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pika_context_get_foreground (context, &brush_color);
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}
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/* Convert to linear RGBA */
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if (brush_color_ptr)
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pika_pickable_rgb_to_pixel (dest_pickable,
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&brush_color,
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babl_format ("RGBA double"),
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&brush_color);
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n_strokes = pika_symmetry_get_size (sym);
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for (i = 0; i < n_strokes; i++)
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{
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coords = *(pika_symmetry_get_coords (sym, i));
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pika_brush_core_eval_transform_symmetry (brush_core, sym, i);
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paint_buffer = pika_paint_core_get_paint_buffer (paint_core, drawable,
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paint_options,
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PIKA_LAYER_MODE_NORMAL,
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&coords,
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&paint_buffer_x,
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&paint_buffer_y,
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&paint_width,
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&paint_height);
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if (! paint_buffer)
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continue;
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paint_buffer_width = gegl_buffer_get_width (paint_buffer);
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paint_buffer_height = gegl_buffer_get_height (paint_buffer);
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/* Get the unclipped accumulator coordinates */
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pika_smudge_accumulator_coords (paint_core, &coords, i, &x, &y);
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accum_buffer = g_list_nth_data (smudge->accum_buffers, i);
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/* Old smudge tool:
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* Smudge uses the buffer Accum.
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* For each successive painthit Accum is built like this
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* Accum = rate*Accum + (1-rate)*I.
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* where I is the pixels under the current painthit.
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* Then the paint area (paint_area) is built as
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* (Accum,1) (if no alpha),
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*/
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/* 2017/4/22: New smudge painting tool:
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* Accum=rate*Accum + (1-rate)*I
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* if brush_color_ptr!=NULL
|
|
* Paint=(1-flow)*Accum + flow*BrushColor
|
|
* else, draw brush pixmap on the paint_buffer and
|
|
* Paint=(1-flow)*Accum + flow*Paint
|
|
*
|
|
* For non-pixmap brushes, calculate blending in
|
|
* pika_gegl_smudge_with_paint() instead of calling
|
|
* gegl_buffer_set_color() to reduce gegl's internal processing.
|
|
*/
|
|
if (! brush_color_ptr && flow > 0.0)
|
|
{
|
|
pika_brush_core_color_area_with_pixmap (brush_core, drawable,
|
|
&coords,
|
|
paint_buffer,
|
|
paint_buffer_x,
|
|
paint_buffer_y,
|
|
TRUE);
|
|
}
|
|
|
|
pika_gegl_smudge_with_paint (accum_buffer,
|
|
GEGL_RECTANGLE (paint_buffer_x - x,
|
|
paint_buffer_y - y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
pika_pickable_get_buffer (dest_pickable),
|
|
GEGL_RECTANGLE (paint_buffer_x +
|
|
dest_pickable_off_x,
|
|
paint_buffer_y +
|
|
dest_pickable_off_y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
brush_color_ptr,
|
|
paint_buffer,
|
|
options->no_erasing,
|
|
flow,
|
|
rate);
|
|
|
|
if (pika_dynamics_is_output_enabled (dynamics, PIKA_DYNAMICS_OUTPUT_FORCE))
|
|
force = pika_dynamics_get_linear_value (dynamics,
|
|
PIKA_DYNAMICS_OUTPUT_FORCE,
|
|
&coords,
|
|
paint_options,
|
|
fade_point);
|
|
else
|
|
force = paint_options->brush_force;
|
|
|
|
pika_brush_core_replace_canvas (PIKA_BRUSH_CORE (paint_core), drawable,
|
|
&coords,
|
|
MIN (opacity, PIKA_OPACITY_OPAQUE),
|
|
pika_context_get_opacity (context),
|
|
pika_paint_options_get_brush_mode (paint_options),
|
|
force,
|
|
PIKA_PAINT_INCREMENTAL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pika_smudge_accumulator_coords (PikaPaintCore *paint_core,
|
|
const PikaCoords *coords,
|
|
gint stroke,
|
|
gint *x,
|
|
gint *y)
|
|
{
|
|
PikaSmudge *smudge = PIKA_SMUDGE (paint_core);
|
|
GeglBuffer *accum_buffer;
|
|
|
|
accum_buffer = g_list_nth_data (smudge->accum_buffers, stroke);
|
|
|
|
*x = (gint) coords->x - gegl_buffer_get_width (accum_buffer) / 2;
|
|
*y = (gint) coords->y - gegl_buffer_get_height (accum_buffer) / 2;
|
|
}
|
|
|
|
static void
|
|
pika_smudge_accumulator_size (PikaPaintOptions *paint_options,
|
|
const PikaCoords *coords,
|
|
gint *accumulator_size)
|
|
{
|
|
gdouble max_view_scale = 1.0;
|
|
gdouble max_brush_size;
|
|
|
|
if (paint_options->brush_lock_to_view)
|
|
max_view_scale = MAX (coords->xscale, coords->yscale);
|
|
|
|
max_brush_size = MIN (paint_options->brush_size / max_view_scale,
|
|
PIKA_BRUSH_MAX_SIZE);
|
|
|
|
/* Note: the max brush mask size plus a border of 1 pixel and a
|
|
* little headroom
|
|
*/
|
|
*accumulator_size = ceil (sqrt (2 * SQR (max_brush_size + 1)) + 2);
|
|
}
|
