/* 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
#include "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "libpikabase/pikabase.h"
#include "paint-types.h"
#include "gegl/pika-gegl-utils.h"
#include "core/pika.h"
#include "core/pika-palettes.h"
#include "core/pikabrush.h"
#include "core/pikadrawable.h"
#include "core/pikadynamics.h"
#include "core/pikagradient.h"
#include "core/pikaimage.h"
#include "core/pikapickable.h"
#include "core/pikasymmetry.h"
#include "core/pikatempbuf.h"
#include "pikapaintbrush.h"
#include "pikapaintoptions.h"
#include "pika-intl.h"
static void pika_paintbrush_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time);
static gboolean pika_paintbrush_real_get_color_history_color (PikaPaintbrush *paintbrush,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaRGB *color);
static void pika_paintbrush_real_get_paint_params (PikaPaintbrush *paintbrush,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
gdouble grad_point,
PikaLayerMode *paint_mode,
PikaPaintApplicationMode *paint_appl_mode,
const PikaTempBuf **paint_pixmap,
PikaRGB *paint_color);
G_DEFINE_TYPE (PikaPaintbrush, pika_paintbrush, PIKA_TYPE_BRUSH_CORE)
void
pika_paintbrush_register (Pika *pika,
PikaPaintRegisterCallback callback)
{
(* callback) (pika,
PIKA_TYPE_PAINTBRUSH,
PIKA_TYPE_PAINT_OPTIONS,
"pika-paintbrush",
_("Paintbrush"),
"pika-tool-paintbrush");
}
static void
pika_paintbrush_class_init (PikaPaintbrushClass *klass)
{
PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
PikaBrushCoreClass *brush_core_class = PIKA_BRUSH_CORE_CLASS (klass);
paint_core_class->paint = pika_paintbrush_paint;
brush_core_class->handles_changing_brush = TRUE;
klass->get_color_history_color = pika_paintbrush_real_get_color_history_color;
klass->get_paint_params = pika_paintbrush_real_get_paint_params;
}
static void
pika_paintbrush_init (PikaPaintbrush *paintbrush)
{
}
static void
pika_paintbrush_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time)
{
PikaPaintbrush *paintbrush = PIKA_PAINTBRUSH (paint_core);
g_return_if_fail (g_list_length (drawables) == 1);
switch (paint_state)
{
case PIKA_PAINT_STATE_INIT:
{
PikaRGB color;
for (GList *iter = drawables; iter; iter = iter->next)
if (PIKA_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color &&
PIKA_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color (paintbrush,
iter->data,
paint_options,
&color))
{
PikaContext *context = PIKA_CONTEXT (paint_options);
pika_palettes_add_color_history (context->pika, &color);
}
}
break;
case PIKA_PAINT_STATE_MOTION:
for (GList *iter = drawables; iter; iter = iter->next)
_pika_paintbrush_motion (paint_core, iter->data, paint_options,
sym, PIKA_OPACITY_OPAQUE);
break;
case PIKA_PAINT_STATE_FINISH:
g_clear_weak_pointer (&paintbrush->paint_buffer);
g_clear_pointer (&paintbrush->paint_pixmap, pika_temp_buf_unref);
break;
}
}
static gboolean
pika_paintbrush_real_get_color_history_color (PikaPaintbrush *paintbrush,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaRGB *color)
{
PikaContext *context = PIKA_CONTEXT (paint_options);
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paintbrush);
PikaDynamics *dynamics = pika_context_get_dynamics (context);
/* We don't save gradient color history and pixmap brushes
* have no color to save.
*/
if (pika_dynamics_is_output_enabled (dynamics, PIKA_DYNAMICS_OUTPUT_COLOR) ||
(brush_core->brush && pika_brush_get_pixmap (brush_core->brush)))
{
return FALSE;
}
pika_context_get_foreground (context, color);
return TRUE;
}
static void
pika_paintbrush_real_get_paint_params (PikaPaintbrush *paintbrush,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
gdouble grad_point,
PikaLayerMode *paint_mode,
PikaPaintApplicationMode *paint_appl_mode,
const PikaTempBuf **paint_pixmap,
PikaRGB *paint_color)
{
PikaPaintCore *paint_core = PIKA_PAINT_CORE (paintbrush);
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paintbrush);
PikaContext *context = PIKA_CONTEXT (paint_options);
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
*paint_mode = pika_context_get_paint_mode (context);
if (pika_paint_options_are_dynamics_enabled (paint_options) &&
pika_paint_options_get_gradient_color (paint_options, image,
grad_point,
paint_core->pixel_dist,
paint_color))
{
/* optionally take the color from the current gradient */
pika_pickable_srgb_to_image_color (PIKA_PICKABLE (drawable),
paint_color, paint_color);
*paint_appl_mode = PIKA_PAINT_INCREMENTAL;
}
else if (brush_core->brush && pika_brush_get_pixmap (brush_core->brush))
{
/* otherwise check if the brush has a pixmap and use that to
* color the area
*/
*paint_pixmap = pika_brush_core_get_brush_pixmap (brush_core);
*paint_appl_mode = PIKA_PAINT_INCREMENTAL;
}
else
{
/* otherwise fill the area with the foreground color */
pika_context_get_foreground (context, paint_color);
pika_pickable_srgb_to_image_color (PIKA_PICKABLE (drawable),
paint_color, paint_color);
}
}
void
_pika_paintbrush_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
gdouble opacity)
{
PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_core);
PikaPaintbrush *paintbrush = PIKA_PAINTBRUSH (paint_core);
PikaContext *context = PIKA_CONTEXT (paint_options);
PikaDynamics *dynamics = brush_core->dynamics;
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
gdouble fade_point;
gdouble grad_point;
gdouble force;
PikaCoords coords;
gint n_strokes;
gint off_x, off_y;
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);
paint_core->sym = sym;
/* Some settings are based on the original stroke. */
opacity *= pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_OPACITY,
&coords,
paint_options,
fade_point);
if (opacity == 0.0)
return;
if (PIKA_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
{
pika_brush_core_eval_transform_dynamics (brush_core,
image,
paint_options,
&coords);
}
grad_point = pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_COLOR,
&coords,
paint_options,
fade_point);
n_strokes = pika_symmetry_get_size (sym);
for (i = 0; i < n_strokes; i++)
{
PikaLayerMode paint_mode;
PikaPaintApplicationMode paint_appl_mode;
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
const PikaTempBuf *paint_pixmap = NULL;
PikaRGB paint_color;
gint paint_width, paint_height;
paint_appl_mode = paint_options->application_mode;
PIKA_PAINTBRUSH_GET_CLASS (paintbrush)->get_paint_params (paintbrush,
drawable,
paint_options,
sym,
grad_point,
&paint_mode,
&paint_appl_mode,
&paint_pixmap,
&paint_color);
coords = *(pika_symmetry_get_coords (sym, i));
if (PIKA_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
pika_brush_core_eval_transform_symmetry (brush_core, sym, i);
paint_buffer = pika_paint_core_get_paint_buffer (paint_core, drawable,
paint_options,
paint_mode,
&coords,
&paint_buffer_x,
&paint_buffer_y,
&paint_width,
&paint_height);
coords = *(pika_symmetry_get_coords (sym, i));
if (! paint_buffer)
continue;
if (! paint_pixmap)
{
opacity *= paint_color.a;
pika_rgb_set_alpha (&paint_color, PIKA_OPACITY_OPAQUE);
}
/* fill the paint buffer. we can skip this step when reusing the
* previous paint buffer, if the paint color/pixmap hasn't changed
* (unless using an applicator, which currently modifies the paint buffer
* in-place).
*/
if (paint_core->applicators ||
paint_buffer != paintbrush->paint_buffer ||
paint_pixmap != paintbrush->paint_pixmap ||
(! paint_pixmap && (pika_rgba_distance (&paint_color,
&paintbrush->paint_color))))
{
g_set_weak_pointer (&paintbrush->paint_buffer, paint_buffer);
if (paint_pixmap != paintbrush->paint_pixmap)
{
g_clear_pointer (&paintbrush->paint_pixmap, pika_temp_buf_unref);
if (paint_pixmap)
paintbrush->paint_pixmap = pika_temp_buf_ref (paint_pixmap);
}
paintbrush->paint_color = paint_color;
if (paint_pixmap)
{
pika_brush_core_color_area_with_pixmap (brush_core, drawable,
&coords,
paint_buffer,
paint_buffer_x,
paint_buffer_y,
FALSE);
}
else
{
GeglColor *color;
color = pika_gegl_color_new (&paint_color,
pika_drawable_get_space (drawable));
gegl_buffer_set_color (paint_buffer, NULL, color);
g_object_unref (color);
}
}
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;
/* finally, let the brush core paste the colored area on the canvas */
pika_brush_core_paste_canvas (brush_core, drawable,
&coords,
MIN (opacity, PIKA_OPACITY_OPAQUE),
pika_context_get_opacity (context),
paint_mode,
pika_paint_options_get_brush_mode (paint_options),
force,
paint_appl_mode);
}
}