215 lines
8.0 KiB
C
215 lines
8.0 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 "libpikabase/pikabase.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 "core/pika.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/pikasymmetry.h"
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#include "pikadodgeburn.h"
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#include "pikadodgeburnoptions.h"
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#include "pika-intl.h"
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static void pika_dodge_burn_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 void pika_dodge_burn_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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G_DEFINE_TYPE (PikaDodgeBurn, pika_dodge_burn, PIKA_TYPE_BRUSH_CORE)
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#define parent_class pika_dodge_burn_parent_class
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void
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pika_dodge_burn_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_DODGE_BURN,
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PIKA_TYPE_DODGE_BURN_OPTIONS,
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"pika-dodge-burn",
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_("Dodge/Burn"),
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"pika-tool-dodge");
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}
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static void
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pika_dodge_burn_class_init (PikaDodgeBurnClass *klass)
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{
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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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paint_core_class->paint = pika_dodge_burn_paint;
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brush_core_class->handles_changing_brush = TRUE;
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}
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static void
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pika_dodge_burn_init (PikaDodgeBurn *dodgeburn)
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{
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}
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static void
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pika_dodge_burn_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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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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break;
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case PIKA_PAINT_STATE_MOTION:
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for (GList *iter = drawables; iter; iter = iter->next)
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pika_dodge_burn_motion (paint_core, iter->data, paint_options, sym);
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break;
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case PIKA_PAINT_STATE_FINISH:
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break;
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}
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}
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static void
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pika_dodge_burn_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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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
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PikaDodgeBurnOptions *options = PIKA_DODGE_BURN_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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GeglBuffer *src_buffer;
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GeglBuffer *paint_buffer;
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gint paint_buffer_x;
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gint paint_buffer_y;
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gdouble fade_point;
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gdouble opacity;
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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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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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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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if (paint_options->application_mode == PIKA_PAINT_CONSTANT)
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src_buffer = pika_paint_core_get_orig_image (paint_core, drawable);
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else
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src_buffer = pika_drawable_get_buffer (drawable);
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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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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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/* DodgeBurn the region */
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pika_gegl_dodgeburn (src_buffer,
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GEGL_RECTANGLE (paint_buffer_x,
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paint_buffer_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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paint_buffer,
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GEGL_RECTANGLE (0, 0, 0, 0),
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options->exposure / 100.0,
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options->type,
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options->mode);
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if (pika_dynamics_is_output_enabled (dynamics, PIKA_DYNAMICS_OUTPUT_FORCE))
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force = pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_FORCE,
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&coords,
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paint_options,
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fade_point);
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else
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force = paint_options->brush_force;
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/* Replace the newly dodgedburned area (paint_area) to the image */
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pika_brush_core_replace_canvas (PIKA_BRUSH_CORE (paint_core), drawable,
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&coords,
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MIN (opacity, PIKA_OPACITY_OPAQUE),
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pika_context_get_opacity (context),
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pika_paint_options_get_brush_mode (paint_options),
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force,
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paint_options->application_mode);
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}
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}
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