PIKApp/app/paint/pikadodgeburn.c

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2023-09-26 00:35:21 +02:00
/* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "paint-types.h"
#include "gegl/pika-gegl-loops.h"
#include "core/pika.h"
#include "core/pikadrawable.h"
#include "core/pikadynamics.h"
#include "core/pikaimage.h"
#include "core/pikasymmetry.h"
#include "pikadodgeburn.h"
#include "pikadodgeburnoptions.h"
#include "pika-intl.h"
static void pika_dodge_burn_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time);
static void pika_dodge_burn_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym);
G_DEFINE_TYPE (PikaDodgeBurn, pika_dodge_burn, PIKA_TYPE_BRUSH_CORE)
#define parent_class pika_dodge_burn_parent_class
void
pika_dodge_burn_register (Pika *pika,
PikaPaintRegisterCallback callback)
{
(* callback) (pika,
PIKA_TYPE_DODGE_BURN,
PIKA_TYPE_DODGE_BURN_OPTIONS,
"pika-dodge-burn",
_("Dodge/Burn"),
"pika-tool-dodge");
}
static void
pika_dodge_burn_class_init (PikaDodgeBurnClass *klass)
{
PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
PikaBrushCoreClass *brush_core_class = PIKA_BRUSH_CORE_CLASS (klass);
paint_core_class->paint = pika_dodge_burn_paint;
brush_core_class->handles_changing_brush = TRUE;
}
static void
pika_dodge_burn_init (PikaDodgeBurn *dodgeburn)
{
}
static void
pika_dodge_burn_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_INIT:
break;
case PIKA_PAINT_STATE_MOTION:
for (GList *iter = drawables; iter; iter = iter->next)
pika_dodge_burn_motion (paint_core, iter->data, paint_options, sym);
break;
case PIKA_PAINT_STATE_FINISH:
break;
}
}
static void
pika_dodge_burn_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym)
{
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
PikaDodgeBurnOptions *options = PIKA_DODGE_BURN_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 *src_buffer;
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
gdouble fade_point;
gdouble opacity;
gdouble force;
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;
if (paint_options->application_mode == PIKA_PAINT_CONSTANT)
src_buffer = pika_paint_core_get_orig_image (paint_core, drawable);
else
src_buffer = pika_drawable_get_buffer (drawable);
pika_brush_core_eval_transform_dynamics (brush_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;
/* DodgeBurn the region */
pika_gegl_dodgeburn (src_buffer,
GEGL_RECTANGLE (paint_buffer_x,
paint_buffer_y,
gegl_buffer_get_width (paint_buffer),
gegl_buffer_get_height (paint_buffer)),
paint_buffer,
GEGL_RECTANGLE (0, 0, 0, 0),
options->exposure / 100.0,
options->type,
options->mode);
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;
/* Replace the newly dodgedburned area (paint_area) to the image */
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,
paint_options->application_mode);
}
}