mirror of https://github.com/GNOME/gimp.git
383 lines
16 KiB
C
383 lines
16 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 <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <cairo.h>
|
|
#include <gegl.h>
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
|
|
|
#include "libgimpcolor/gimpcolor.h"
|
|
#include "libgimpmath/gimpmath.h"
|
|
#include "libgimpbase/gimpbase.h"
|
|
|
|
#include "paint-types.h"
|
|
|
|
#include "gegl/gimp-gegl-utils.h"
|
|
|
|
#include "core/gimp.h"
|
|
#include "core/gimp-palettes.h"
|
|
#include "core/gimpbrush.h"
|
|
#include "core/gimpdrawable.h"
|
|
#include "core/gimpdynamics.h"
|
|
#include "core/gimpgradient.h"
|
|
#include "core/gimpimage.h"
|
|
#include "core/gimppickable.h"
|
|
#include "core/gimpsymmetry.h"
|
|
#include "core/gimptempbuf.h"
|
|
|
|
#include "gimppaintbrush.h"
|
|
#include "gimppaintoptions.h"
|
|
|
|
#include "gimp-intl.h"
|
|
|
|
|
|
static void gimp_paintbrush_paint (GimpPaintCore *paint_core,
|
|
GList *drawables,
|
|
GimpPaintOptions *paint_options,
|
|
GimpSymmetry *sym,
|
|
GimpPaintState paint_state,
|
|
guint32 time);
|
|
|
|
static gboolean gimp_paintbrush_real_get_color_history_color (GimpPaintbrush *paintbrush,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GeglColor **color);
|
|
static void gimp_paintbrush_real_get_paint_params (GimpPaintbrush *paintbrush,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GimpSymmetry *sym,
|
|
gdouble grad_point,
|
|
GimpLayerMode *paint_mode,
|
|
GimpPaintApplicationMode *paint_appl_mode,
|
|
const GimpTempBuf **paint_pixmap,
|
|
GeglColor **paint_color);
|
|
|
|
|
|
G_DEFINE_TYPE (GimpPaintbrush, gimp_paintbrush, GIMP_TYPE_BRUSH_CORE)
|
|
|
|
|
|
void
|
|
gimp_paintbrush_register (Gimp *gimp,
|
|
GimpPaintRegisterCallback callback)
|
|
{
|
|
(* callback) (gimp,
|
|
GIMP_TYPE_PAINTBRUSH,
|
|
GIMP_TYPE_PAINT_OPTIONS,
|
|
"gimp-paintbrush",
|
|
_("Paintbrush"),
|
|
"gimp-tool-paintbrush");
|
|
}
|
|
|
|
static void
|
|
gimp_paintbrush_class_init (GimpPaintbrushClass *klass)
|
|
{
|
|
GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
|
|
GimpBrushCoreClass *brush_core_class = GIMP_BRUSH_CORE_CLASS (klass);
|
|
|
|
paint_core_class->paint = gimp_paintbrush_paint;
|
|
|
|
brush_core_class->handles_changing_brush = TRUE;
|
|
|
|
klass->get_color_history_color = gimp_paintbrush_real_get_color_history_color;
|
|
klass->get_paint_params = gimp_paintbrush_real_get_paint_params;
|
|
}
|
|
|
|
static void
|
|
gimp_paintbrush_init (GimpPaintbrush *paintbrush)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gimp_paintbrush_paint (GimpPaintCore *paint_core,
|
|
GList *drawables,
|
|
GimpPaintOptions *paint_options,
|
|
GimpSymmetry *sym,
|
|
GimpPaintState paint_state,
|
|
guint32 time)
|
|
{
|
|
GimpPaintbrush *paintbrush = GIMP_PAINTBRUSH (paint_core);
|
|
|
|
g_return_if_fail (g_list_length (drawables) == 1);
|
|
|
|
switch (paint_state)
|
|
{
|
|
case GIMP_PAINT_STATE_INIT:
|
|
{
|
|
GeglColor *color = NULL;
|
|
|
|
for (GList *iter = drawables; iter; iter = iter->next)
|
|
if (GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color &&
|
|
GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color (paintbrush,
|
|
iter->data,
|
|
paint_options,
|
|
&color))
|
|
{
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
|
|
gimp_palettes_add_color_history (context->gimp, color);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GIMP_PAINT_STATE_MOTION:
|
|
for (GList *iter = drawables; iter; iter = iter->next)
|
|
_gimp_paintbrush_motion (paint_core, iter->data, paint_options,
|
|
sym, GIMP_OPACITY_OPAQUE);
|
|
break;
|
|
|
|
case GIMP_PAINT_STATE_FINISH:
|
|
g_clear_weak_pointer (&paintbrush->paint_buffer);
|
|
g_clear_pointer (&paintbrush->paint_pixmap, gimp_temp_buf_unref);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gimp_paintbrush_real_get_color_history_color (GimpPaintbrush *paintbrush,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GeglColor **color)
|
|
{
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paintbrush);
|
|
GimpDynamics *dynamics = gimp_context_get_dynamics (context);
|
|
|
|
/* We don't save gradient color history and pixmap brushes
|
|
* have no color to save.
|
|
*/
|
|
if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_COLOR) ||
|
|
(brush_core->brush && gimp_brush_get_pixmap (brush_core->brush)))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
*color = gimp_context_get_foreground (context);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gimp_paintbrush_real_get_paint_params (GimpPaintbrush *paintbrush,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GimpSymmetry *sym,
|
|
gdouble grad_point,
|
|
GimpLayerMode *paint_mode,
|
|
GimpPaintApplicationMode *paint_appl_mode,
|
|
const GimpTempBuf **paint_pixmap,
|
|
GeglColor **paint_color)
|
|
{
|
|
GimpPaintCore *paint_core = GIMP_PAINT_CORE (paintbrush);
|
|
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paintbrush);
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
|
|
*paint_mode = gimp_context_get_paint_mode (context);
|
|
*paint_color = NULL;
|
|
|
|
if (gimp_paint_options_are_dynamics_enabled (paint_options) &&
|
|
gimp_paint_options_get_gradient_color (paint_options, image,
|
|
grad_point,
|
|
paint_core->pixel_dist,
|
|
paint_color))
|
|
{
|
|
/* optionally take the color from the current gradient */
|
|
*paint_appl_mode = GIMP_PAINT_INCREMENTAL;
|
|
}
|
|
else if (brush_core->brush && gimp_brush_get_pixmap (brush_core->brush))
|
|
{
|
|
/* otherwise check if the brush has a pixmap and use that to
|
|
* color the area
|
|
*/
|
|
*paint_pixmap = gimp_brush_core_get_brush_pixmap (brush_core);
|
|
|
|
*paint_appl_mode = GIMP_PAINT_INCREMENTAL;
|
|
}
|
|
else
|
|
{
|
|
/* otherwise fill the area with the foreground color */
|
|
*paint_color = gegl_color_duplicate (gimp_context_get_foreground (context));
|
|
}
|
|
}
|
|
|
|
void
|
|
_gimp_paintbrush_motion (GimpPaintCore *paint_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
GimpSymmetry *sym,
|
|
gdouble opacity)
|
|
{
|
|
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_core);
|
|
GimpPaintbrush *paintbrush = GIMP_PAINTBRUSH (paint_core);
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpDynamics *dynamics = brush_core->dynamics;
|
|
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
gdouble fade_point;
|
|
gdouble grad_point;
|
|
gdouble force;
|
|
GimpCoords coords;
|
|
gint n_strokes;
|
|
gint off_x, off_y;
|
|
gint i;
|
|
|
|
fade_point = gimp_paint_options_get_fade (paint_options, image,
|
|
paint_core->pixel_dist);
|
|
|
|
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
|
|
|
|
coords = *(gimp_symmetry_get_origin (sym));
|
|
coords.x -= off_x;
|
|
coords.y -= off_y;
|
|
gimp_symmetry_set_origin (sym, drawable, &coords);
|
|
paint_core->sym = sym;
|
|
|
|
/* Some settings are based on the original stroke. */
|
|
opacity *= gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_OPACITY,
|
|
&coords,
|
|
paint_options,
|
|
fade_point);
|
|
if (opacity == 0.0)
|
|
return;
|
|
|
|
if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
|
|
{
|
|
gimp_brush_core_eval_transform_dynamics (brush_core,
|
|
image,
|
|
paint_options,
|
|
&coords);
|
|
}
|
|
|
|
grad_point = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_COLOR,
|
|
&coords,
|
|
paint_options,
|
|
fade_point);
|
|
|
|
n_strokes = gimp_symmetry_get_size (sym);
|
|
for (i = 0; i < n_strokes; i++)
|
|
{
|
|
GimpLayerMode paint_mode;
|
|
GimpPaintApplicationMode paint_appl_mode;
|
|
GeglBuffer *paint_buffer;
|
|
gint paint_buffer_x;
|
|
gint paint_buffer_y;
|
|
const GimpTempBuf *paint_pixmap = NULL;
|
|
GeglColor *paint_color;
|
|
gint paint_width, paint_height;
|
|
|
|
paint_appl_mode = paint_options->application_mode;
|
|
|
|
GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_paint_params (paintbrush,
|
|
drawable,
|
|
paint_options,
|
|
sym,
|
|
grad_point,
|
|
&paint_mode,
|
|
&paint_appl_mode,
|
|
&paint_pixmap,
|
|
&paint_color);
|
|
|
|
coords = *(gimp_symmetry_get_coords (sym, i));
|
|
|
|
if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
|
|
gimp_brush_core_eval_transform_symmetry (brush_core, sym, i);
|
|
|
|
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
|
|
paint_options,
|
|
paint_mode,
|
|
&coords,
|
|
&paint_buffer_x,
|
|
&paint_buffer_y,
|
|
&paint_width,
|
|
&paint_height);
|
|
coords = *(gimp_symmetry_get_coords (sym, i));
|
|
|
|
if (! paint_buffer)
|
|
continue;
|
|
|
|
if (! paint_pixmap)
|
|
{
|
|
gdouble alpha;
|
|
|
|
gegl_color_get_pixel (paint_color, babl_format ("A double"), &alpha);
|
|
opacity *= alpha;
|
|
gimp_color_set_alpha (paint_color, GIMP_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 &&
|
|
! gimp_color_is_perceptually_identical (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, gimp_temp_buf_unref);
|
|
|
|
if (paint_pixmap)
|
|
paintbrush->paint_pixmap = gimp_temp_buf_ref (paint_pixmap);
|
|
}
|
|
|
|
g_clear_object (&paintbrush->paint_color);
|
|
paintbrush->paint_color = paint_color;
|
|
|
|
if (paint_pixmap)
|
|
gimp_brush_core_color_area_with_pixmap (brush_core, drawable,
|
|
&coords,
|
|
paint_buffer,
|
|
paint_buffer_x,
|
|
paint_buffer_y,
|
|
FALSE);
|
|
else
|
|
gegl_buffer_set_color (paint_buffer, NULL, paint_color);
|
|
}
|
|
else
|
|
{
|
|
g_clear_object (&paint_color);
|
|
}
|
|
|
|
if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_FORCE))
|
|
force = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_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 */
|
|
gimp_brush_core_paste_canvas (brush_core, drawable,
|
|
&coords,
|
|
MIN (opacity, GIMP_OPACITY_OPAQUE),
|
|
gimp_context_get_opacity (context),
|
|
paint_mode,
|
|
gimp_paint_options_get_brush_mode (paint_options),
|
|
force,
|
|
paint_appl_mode);
|
|
}
|
|
}
|