PIKApp/app/paint/pikaclone.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 <stdlib.h>
#include <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libpikabase/pikabase.h"
#include "paint-types.h"
#include "gegl/pika-gegl-apply-operation.h"
#include "gegl/pika-gegl-loops.h"
#include "core/pika.h"
#include "core/pikadrawable.h"
#include "core/pikadynamics.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "core/pikapattern.h"
#include "core/pikapickable.h"
#include "core/pikasymmetry.h"
#include "pikaclone.h"
#include "pikacloneoptions.h"
#include "pika-intl.h"
static gboolean pika_clone_start (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
const PikaCoords *coords,
GError **error);
static void pika_clone_motion (PikaSourceCore *source_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
const PikaCoords *coords,
GeglNode *op,
gdouble opacity,
PikaPickable *src_pickable,
GeglBuffer *src_buffer,
GeglRectangle *src_rect,
gint src_offset_x,
gint src_offset_y,
GeglBuffer *paint_buffer,
gint paint_buffer_x,
gint paint_buffer_y,
gint paint_area_offset_x,
gint paint_area_offset_y,
gint paint_area_width,
gint paint_area_height);
static gboolean pika_clone_use_source (PikaSourceCore *source_core,
PikaSourceOptions *options);
G_DEFINE_TYPE (PikaClone, pika_clone, PIKA_TYPE_SOURCE_CORE)
#define parent_class pika_clone_parent_class
void
pika_clone_register (Pika *pika,
PikaPaintRegisterCallback callback)
{
(* callback) (pika,
PIKA_TYPE_CLONE,
PIKA_TYPE_CLONE_OPTIONS,
"pika-clone",
_("Clone"),
"pika-tool-clone");
}
static void
pika_clone_class_init (PikaCloneClass *klass)
{
PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
PikaSourceCoreClass *source_core_class = PIKA_SOURCE_CORE_CLASS (klass);
paint_core_class->start = pika_clone_start;
source_core_class->use_source = pika_clone_use_source;
source_core_class->motion = pika_clone_motion;
}
static void
pika_clone_init (PikaClone *clone)
{
}
static gboolean
pika_clone_start (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
const PikaCoords *coords,
GError **error)
{
PikaCloneOptions *options = PIKA_CLONE_OPTIONS (paint_options);
if (! PIKA_PAINT_CORE_CLASS (parent_class)->start (paint_core, drawables,
paint_options, coords,
error))
{
return FALSE;
}
if (options->clone_type == PIKA_CLONE_PATTERN)
{
if (! pika_context_get_pattern (PIKA_CONTEXT (options)))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("No patterns available for use with this tool."));
return FALSE;
}
}
return TRUE;
}
static void
pika_clone_motion (PikaSourceCore *source_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
const PikaCoords *coords,
GeglNode *op,
gdouble opacity,
PikaPickable *src_pickable,
GeglBuffer *src_buffer,
GeglRectangle *src_rect,
gint src_offset_x,
gint src_offset_y,
GeglBuffer *paint_buffer,
gint paint_buffer_x,
gint paint_buffer_y,
gint paint_area_offset_x,
gint paint_area_offset_y,
gint paint_area_width,
gint paint_area_height)
{
PikaPaintCore *paint_core = PIKA_PAINT_CORE (source_core);
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (source_core);
PikaCloneOptions *options = PIKA_CLONE_OPTIONS (paint_options);
PikaSourceOptions *source_options = PIKA_SOURCE_OPTIONS (paint_options);
PikaContext *context = PIKA_CONTEXT (paint_options);
PikaDynamics *dynamics = brush_core->dynamics;
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
gdouble fade_point;
gdouble force;
if (pika_source_core_use_source (source_core, source_options))
{
if (! op)
{
pika_gegl_buffer_copy (src_buffer,
GEGL_RECTANGLE (src_rect->x,
src_rect->y,
paint_area_width,
paint_area_height),
GEGL_ABYSS_NONE,
paint_buffer,
GEGL_RECTANGLE (paint_area_offset_x,
paint_area_offset_y,
0, 0));
}
else
{
pika_gegl_apply_operation (src_buffer, NULL, NULL, op,
paint_buffer,
GEGL_RECTANGLE (paint_area_offset_x,
paint_area_offset_y,
paint_area_width,
paint_area_height),
FALSE);
}
}
else if (options->clone_type == PIKA_CLONE_PATTERN)
{
PikaPattern *pattern = pika_context_get_pattern (context);
GeglBuffer *src_buffer = pika_pattern_create_buffer (pattern);
src_offset_x += gegl_buffer_get_width (src_buffer) / 2;
src_offset_y += gegl_buffer_get_height (src_buffer) / 2;
gegl_buffer_set_pattern (paint_buffer,
GEGL_RECTANGLE (paint_area_offset_x,
paint_area_offset_y,
paint_area_width,
paint_area_height),
src_buffer,
- paint_buffer_x - src_offset_x,
- paint_buffer_y - src_offset_y);
g_object_unref (src_buffer);
}
else
{
g_return_if_reached ();
}
fade_point = pika_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
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_paste_canvas (PIKA_BRUSH_CORE (paint_core), drawable,
coords,
MIN (opacity, PIKA_OPACITY_OPAQUE),
pika_context_get_opacity (context),
pika_context_get_paint_mode (context),
pika_paint_options_get_brush_mode (paint_options),
force,
/* In fixed mode, paint incremental so the
* individual brushes are properly applied
* on top of each other.
* Otherwise the stuff we paint is seamless
* and we don't need intermediate masking.
*/
source_options->align_mode ==
PIKA_SOURCE_ALIGN_FIXED ?
PIKA_PAINT_INCREMENTAL : PIKA_PAINT_CONSTANT);
}
static gboolean
pika_clone_use_source (PikaSourceCore *source_core,
PikaSourceOptions *options)
{
return PIKA_CLONE_OPTIONS (options)->clone_type == PIKA_CLONE_IMAGE;
}