/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 3 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, see .
*/
#include "config.h"
#include
#include
#include "paint-types.h"
#include "gegl/pika-gegl-loops.h"
#include "core/pika.h"
#include "core/pikabrush.h"
#include "core/pikadrawable.h"
#include "core/pikadynamics.h"
#include "core/pikaimage.h"
#include "core/pikapickable.h"
#include "core/pikasymmetry.h"
#include "core/pikatempbuf.h"
#include "pikaconvolve.h"
#include "pikaconvolveoptions.h"
#include "pika-intl.h"
#define FIELD_COLS 4
#define MIN_BLUR 64 /* (8/9 original pixel) */
#define MAX_BLUR 0.25 /* (1/33 original pixel) */
#define MIN_SHARPEN -512
#define MAX_SHARPEN -64
static void pika_convolve_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time);
static void pika_convolve_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym);
static void pika_convolve_calculate_matrix (PikaConvolve *convolve,
PikaConvolveType type,
gint radius_x,
gint radius_y,
gdouble rate);
static gdouble pika_convolve_sum_matrix (const gfloat *matrix);
G_DEFINE_TYPE (PikaConvolve, pika_convolve, PIKA_TYPE_BRUSH_CORE)
void
pika_convolve_register (Pika *pika,
PikaPaintRegisterCallback callback)
{
(* callback) (pika,
PIKA_TYPE_CONVOLVE,
PIKA_TYPE_CONVOLVE_OPTIONS,
"pika-convolve",
_("Convolve"),
"pika-tool-blur");
}
static void
pika_convolve_class_init (PikaConvolveClass *klass)
{
PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
paint_core_class->paint = pika_convolve_paint;
}
static void
pika_convolve_init (PikaConvolve *convolve)
{
gint i;
for (i = 0; i < 9; i++)
convolve->matrix[i] = 1.0;
convolve->matrix_divisor = 9.0;
}
static void
pika_convolve_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time)
{
g_return_if_fail (g_list_length (drawables) == 1);
switch (paint_state)
{
case PIKA_PAINT_STATE_MOTION:
for (GList *iter = drawables; iter; iter = iter->next)
pika_convolve_motion (paint_core, iter->data, paint_options, sym);
break;
default:
break;
}
}
static void
pika_convolve_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym)
{
PikaConvolve *convolve = PIKA_CONVOLVE (paint_core);
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
PikaConvolveOptions *options = PIKA_CONVOLVE_OPTIONS (paint_options);
PikaContext *context = PIKA_CONTEXT (paint_options);
PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
PikaTempBuf *temp_buf;
GeglBuffer *convolve_buffer;
gdouble fade_point;
gdouble opacity;
gdouble rate;
PikaCoords coords;
gint off_x, off_y;
gint paint_width, paint_height;
gint n_strokes;
gint i;
fade_point = pika_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y);
coords = *(pika_symmetry_get_origin (sym));
coords.x -= off_x;
coords.y -= off_y;
pika_symmetry_set_origin (sym, drawable, &coords);
opacity = pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_OPACITY,
&coords,
paint_options,
fade_point);
if (opacity == 0.0)
return;
pika_brush_core_eval_transform_dynamics (PIKA_BRUSH_CORE (paint_core),
image,
paint_options,
&coords);
n_strokes = pika_symmetry_get_size (sym);
for (i = 0; i < n_strokes; i++)
{
coords = *(pika_symmetry_get_coords (sym, i));
pika_brush_core_eval_transform_symmetry (brush_core, sym, i);
paint_buffer = pika_paint_core_get_paint_buffer (paint_core, drawable,
paint_options,
PIKA_LAYER_MODE_NORMAL,
&coords,
&paint_buffer_x,
&paint_buffer_y,
&paint_width,
&paint_height);
if (! paint_buffer)
continue;
rate = (options->rate *
pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_RATE,
&coords,
paint_options,
fade_point));
pika_convolve_calculate_matrix (convolve, options->type,
pika_brush_get_width (brush_core->brush) / 2,
pika_brush_get_height (brush_core->brush) / 2,
rate);
/* need a linear buffer for pika_gegl_convolve() */
temp_buf = pika_temp_buf_new (gegl_buffer_get_width (paint_buffer),
gegl_buffer_get_height (paint_buffer),
gegl_buffer_get_format (paint_buffer));
convolve_buffer = pika_temp_buf_create_buffer (temp_buf);
pika_temp_buf_unref (temp_buf);
pika_gegl_buffer_copy (
pika_drawable_get_buffer (drawable),
GEGL_RECTANGLE (paint_buffer_x,
paint_buffer_y,
gegl_buffer_get_width (paint_buffer),
gegl_buffer_get_height (paint_buffer)),
GEGL_ABYSS_NONE,
convolve_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
pika_gegl_convolve (convolve_buffer,
GEGL_RECTANGLE (0, 0,
gegl_buffer_get_width (convolve_buffer),
gegl_buffer_get_height (convolve_buffer)),
paint_buffer,
GEGL_RECTANGLE (0, 0,
gegl_buffer_get_width (paint_buffer),
gegl_buffer_get_height (paint_buffer)),
convolve->matrix, 3, convolve->matrix_divisor,
PIKA_NORMAL_CONVOL, TRUE);
g_object_unref (convolve_buffer);
pika_brush_core_replace_canvas (brush_core, drawable,
&coords,
MIN (opacity, PIKA_OPACITY_OPAQUE),
pika_context_get_opacity (context),
pika_paint_options_get_brush_mode (paint_options),
1.0,
PIKA_PAINT_INCREMENTAL);
}
}
static void
pika_convolve_calculate_matrix (PikaConvolve *convolve,
PikaConvolveType type,
gint radius_x,
gint radius_y,
gdouble rate)
{
/* find percent of tool pressure */
const gdouble percent = MIN (rate / 100.0, 1.0);
convolve->matrix[0] = (radius_x && radius_y) ? 1.0 : 0.0;
convolve->matrix[1] = (radius_y) ? 1.0 : 0.0;
convolve->matrix[2] = (radius_x && radius_y) ? 1.0 : 0.0;
convolve->matrix[3] = (radius_x) ? 1.0 : 0.0;
/* get the appropriate convolution matrix and size and divisor */
switch (type)
{
case PIKA_CONVOLVE_BLUR:
convolve->matrix[4] = MIN_BLUR + percent * (MAX_BLUR - MIN_BLUR);
break;
case PIKA_CONVOLVE_SHARPEN:
convolve->matrix[4] = MIN_SHARPEN + percent * (MAX_SHARPEN - MIN_SHARPEN);
break;
}
convolve->matrix[5] = (radius_x) ? 1.0 : 0.0;
convolve->matrix[6] = (radius_x && radius_y) ? 1.0 : 0.0;
convolve->matrix[7] = (radius_y) ? 1.0 : 0.0;
convolve->matrix[8] = (radius_x && radius_y) ? 1.0 : 0.0;
convolve->matrix_divisor = pika_convolve_sum_matrix (convolve->matrix);
}
static gdouble
pika_convolve_sum_matrix (const gfloat *matrix)
{
gdouble sum = 0.0;
gint i;
for (i = 0; i < 9; i++)
sum += matrix[i];
return sum;
}