mirror of https://github.com/GNOME/gimp.git
354 lines
13 KiB
C
354 lines
13 KiB
C
/* GIMP - The GNU Image Manipulation Program
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
|
#include <gegl.h>
|
|
|
|
#include "libgimpmath/gimpmath.h"
|
|
|
|
#include "paint-types.h"
|
|
|
|
#include "gegl/gimp-gegl-loops.h"
|
|
#include "gegl/gimp-gegl-utils.h"
|
|
|
|
#include "core/gimpbrush.h"
|
|
#include "core/gimpdrawable.h"
|
|
#include "core/gimpdynamics.h"
|
|
#include "core/gimpimage.h"
|
|
#include "core/gimppickable.h"
|
|
#include "core/gimptempbuf.h"
|
|
|
|
#include "gimpsmudge.h"
|
|
#include "gimpsmudgeoptions.h"
|
|
|
|
#include "gimp-intl.h"
|
|
|
|
|
|
static void gimp_smudge_finalize (GObject *object);
|
|
|
|
static void gimp_smudge_paint (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords,
|
|
GimpPaintState paint_state,
|
|
guint32 time);
|
|
static gboolean gimp_smudge_start (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords);
|
|
static void gimp_smudge_motion (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords);
|
|
|
|
static void gimp_smudge_accumulator_coords (GimpPaintCore *paint_core,
|
|
const GimpCoords *coords,
|
|
gint *x,
|
|
gint *y);
|
|
|
|
static void gimp_smudge_accumulator_size (GimpPaintOptions *paint_options,
|
|
gint *accumulator_size);
|
|
|
|
|
|
G_DEFINE_TYPE (GimpSmudge, gimp_smudge, GIMP_TYPE_BRUSH_CORE)
|
|
|
|
#define parent_class gimp_smudge_parent_class
|
|
|
|
|
|
void
|
|
gimp_smudge_register (Gimp *gimp,
|
|
GimpPaintRegisterCallback callback)
|
|
{
|
|
(* callback) (gimp,
|
|
GIMP_TYPE_SMUDGE,
|
|
GIMP_TYPE_SMUDGE_OPTIONS,
|
|
"gimp-smudge",
|
|
_("Smudge"),
|
|
"gimp-tool-smudge");
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_class_init (GimpSmudgeClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
|
|
GimpBrushCoreClass *brush_core_class = GIMP_BRUSH_CORE_CLASS (klass);
|
|
|
|
object_class->finalize = gimp_smudge_finalize;
|
|
|
|
paint_core_class->paint = gimp_smudge_paint;
|
|
|
|
brush_core_class->handles_changing_brush = TRUE;
|
|
brush_core_class->handles_transforming_brush = TRUE;
|
|
brush_core_class->handles_dynamic_transforming_brush = TRUE;
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_init (GimpSmudge *smudge)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_finalize (GObject *object)
|
|
{
|
|
GimpSmudge *smudge = GIMP_SMUDGE (object);
|
|
|
|
if (smudge->accum_buffer)
|
|
{
|
|
g_object_unref (smudge->accum_buffer);
|
|
smudge->accum_buffer = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_paint (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords,
|
|
GimpPaintState paint_state,
|
|
guint32 time)
|
|
{
|
|
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
|
|
|
|
switch (paint_state)
|
|
{
|
|
case GIMP_PAINT_STATE_MOTION:
|
|
/* initialization fails if the user starts outside the drawable */
|
|
if (! smudge->initialized)
|
|
smudge->initialized = gimp_smudge_start (paint_core, drawable,
|
|
paint_options, coords);
|
|
|
|
if (smudge->initialized)
|
|
gimp_smudge_motion (paint_core, drawable, paint_options, coords);
|
|
break;
|
|
|
|
case GIMP_PAINT_STATE_FINISH:
|
|
if (smudge->accum_buffer)
|
|
{
|
|
g_object_unref (smudge->accum_buffer);
|
|
smudge->accum_buffer = NULL;
|
|
}
|
|
smudge->initialized = FALSE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gimp_smudge_start (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords)
|
|
{
|
|
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
|
|
GeglBuffer *paint_buffer;
|
|
gint paint_buffer_x;
|
|
gint paint_buffer_y;
|
|
gint accum_size;
|
|
gint x, y;
|
|
|
|
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
|
|
paint_options, coords,
|
|
&paint_buffer_x,
|
|
&paint_buffer_y);
|
|
if (! paint_buffer)
|
|
return FALSE;
|
|
|
|
gimp_smudge_accumulator_size (paint_options, &accum_size);
|
|
|
|
/* Allocate the accumulation buffer */
|
|
smudge->accum_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
|
|
accum_size,
|
|
accum_size),
|
|
babl_format ("RGBA float"));
|
|
|
|
/* adjust the x and y coordinates to the upper left corner of the
|
|
* accumulator
|
|
*/
|
|
gimp_smudge_accumulator_coords (paint_core, coords, &x, &y);
|
|
|
|
/* If clipped, prefill the smudge buffer with the color at the
|
|
* brush position.
|
|
*/
|
|
if (x != paint_buffer_x ||
|
|
y != paint_buffer_y ||
|
|
accum_size != gegl_buffer_get_width (paint_buffer) ||
|
|
accum_size != gegl_buffer_get_height (paint_buffer))
|
|
{
|
|
GimpRGB pixel;
|
|
GeglColor *color;
|
|
|
|
gimp_pickable_get_color_at (GIMP_PICKABLE (drawable),
|
|
CLAMP ((gint) coords->x,
|
|
0,
|
|
gimp_item_get_width (GIMP_ITEM (drawable)) - 1),
|
|
CLAMP ((gint) coords->y,
|
|
0,
|
|
gimp_item_get_height (GIMP_ITEM (drawable)) - 1),
|
|
&pixel);
|
|
|
|
color = gimp_gegl_color_new (&pixel);
|
|
gegl_buffer_set_color (smudge->accum_buffer, NULL, color);
|
|
g_object_unref (color);
|
|
}
|
|
|
|
/* copy the region under the original painthit. */
|
|
gegl_buffer_copy (gimp_drawable_get_buffer (drawable),
|
|
GEGL_RECTANGLE (paint_buffer_x,
|
|
paint_buffer_y,
|
|
gegl_buffer_get_width (paint_buffer),
|
|
gegl_buffer_get_height (paint_buffer)),
|
|
smudge->accum_buffer,
|
|
GEGL_RECTANGLE (paint_buffer_x - x,
|
|
paint_buffer_y - y,
|
|
0, 0));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_motion (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords)
|
|
{
|
|
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
|
|
GimpSmudgeOptions *options = GIMP_SMUDGE_OPTIONS (paint_options);
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
|
|
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
GeglBuffer *paint_buffer;
|
|
gint paint_buffer_x;
|
|
gint paint_buffer_y;
|
|
gint paint_buffer_width;
|
|
gint paint_buffer_height;
|
|
gdouble fade_point;
|
|
gdouble opacity;
|
|
gdouble rate;
|
|
gdouble dynamic_rate;
|
|
gint x, y;
|
|
gdouble hardness;
|
|
|
|
fade_point = gimp_paint_options_get_fade (paint_options, image,
|
|
paint_core->pixel_dist);
|
|
|
|
opacity = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_OPACITY,
|
|
coords,
|
|
paint_options,
|
|
fade_point);
|
|
if (opacity == 0.0)
|
|
return;
|
|
|
|
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
|
|
paint_options, coords,
|
|
&paint_buffer_x,
|
|
&paint_buffer_y);
|
|
if (! paint_buffer)
|
|
return;
|
|
|
|
paint_buffer_width = gegl_buffer_get_width (paint_buffer);
|
|
paint_buffer_height = gegl_buffer_get_height (paint_buffer);
|
|
|
|
/* Get the unclipped acumulator coordinates */
|
|
gimp_smudge_accumulator_coords (paint_core, coords, &x, &y);
|
|
|
|
/* Enable dynamic rate */
|
|
dynamic_rate = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_RATE,
|
|
coords,
|
|
paint_options,
|
|
fade_point);
|
|
|
|
rate = (options->rate / 100.0) * dynamic_rate;
|
|
|
|
/* Smudge uses the buffer Accum.
|
|
* For each successive painthit Accum is built like this
|
|
* Accum = rate*Accum + (1-rate)*I.
|
|
* where I is the pixels under the current painthit.
|
|
* Then the paint area (paint_area) is built as
|
|
* (Accum,1) (if no alpha),
|
|
*/
|
|
|
|
gimp_gegl_smudge_blend (smudge->accum_buffer,
|
|
GEGL_RECTANGLE (paint_buffer_x - x,
|
|
paint_buffer_y - y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
gimp_drawable_get_buffer (drawable),
|
|
GEGL_RECTANGLE (paint_buffer_x,
|
|
paint_buffer_y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
smudge->accum_buffer,
|
|
GEGL_RECTANGLE (paint_buffer_x - x,
|
|
paint_buffer_y - y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
rate);
|
|
|
|
gegl_buffer_copy (smudge->accum_buffer,
|
|
GEGL_RECTANGLE (paint_buffer_x - x,
|
|
paint_buffer_y - y,
|
|
paint_buffer_width,
|
|
paint_buffer_height),
|
|
paint_buffer,
|
|
GEGL_RECTANGLE (0, 0, 0, 0));
|
|
|
|
hardness = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_HARDNESS,
|
|
coords,
|
|
paint_options,
|
|
fade_point);
|
|
|
|
gimp_brush_core_replace_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
|
|
coords,
|
|
MIN (opacity, GIMP_OPACITY_OPAQUE),
|
|
gimp_context_get_opacity (context),
|
|
gimp_paint_options_get_brush_mode (paint_options),
|
|
hardness,
|
|
GIMP_PAINT_INCREMENTAL);
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_accumulator_coords (GimpPaintCore *paint_core,
|
|
const GimpCoords *coords,
|
|
gint *x,
|
|
gint *y)
|
|
{
|
|
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
|
|
|
|
*x = (gint) coords->x - gegl_buffer_get_width (smudge->accum_buffer) / 2;
|
|
*y = (gint) coords->y - gegl_buffer_get_height (smudge->accum_buffer) / 2;
|
|
}
|
|
|
|
static void
|
|
gimp_smudge_accumulator_size (GimpPaintOptions *paint_options,
|
|
gint *accumulator_size)
|
|
{
|
|
/* Note: the max brush mask size plus a border of 1 pixel and a
|
|
* little headroom
|
|
*/
|
|
*accumulator_size = ceil (sqrt (2 * SQR (paint_options->brush_size + 1)) + 2);
|
|
}
|