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gimp/app/paint/gimppaintcore.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 2013 Daniel Sabo
*
* 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 <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "paint-types.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimp-gegl-nodes.h"
#include "gegl/gimp-gegl-utils.h"
#include "gegl/gimpapplicator.h"
#include "core/gimp.h"
#include "core/gimp-utils.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimppickable.h"
#include "core/gimpprojection.h"
#include "core/gimptempbuf.h"
#include "gimppaintcore.h"
#include "gimppaintcoreundo.h"
#include "gimppaintcore-loops.h"
#include "gimppaintoptions.h"
#include "gimpairbrush.h"
#include "gimp-intl.h"
#define STROKE_BUFFER_INIT_SIZE 2000
enum
{
PROP_0,
PROP_UNDO_DESC
};
/* local function prototypes */
static void gimp_paint_core_finalize (GObject *object);
static void gimp_paint_core_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_paint_core_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gboolean gimp_paint_core_real_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GError **error);
static gboolean gimp_paint_core_real_pre_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
GimpPaintState paint_state,
guint32 time);
static void gimp_paint_core_real_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
const GimpCoords *coords,
GimpPaintState paint_state,
guint32 time);
static void gimp_paint_core_real_post_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
GimpPaintState paint_state,
guint32 time);
static void gimp_paint_core_real_interpolate (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
guint32 time);
static GeglBuffer *
gimp_paint_core_real_get_paint_buffer (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
const GimpCoords *coords,
gint *paint_buffer_x,
gint *paint_buffer_y);
static GimpUndo* gimp_paint_core_real_push_undo (GimpPaintCore *core,
GimpImage *image,
const gchar *undo_desc);
G_DEFINE_TYPE (GimpPaintCore, gimp_paint_core, GIMP_TYPE_OBJECT)
#define parent_class gimp_paint_core_parent_class
static gint global_core_ID = 1;
static void
gimp_paint_core_class_init (GimpPaintCoreClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_paint_core_finalize;
object_class->set_property = gimp_paint_core_set_property;
object_class->get_property = gimp_paint_core_get_property;
klass->start = gimp_paint_core_real_start;
klass->pre_paint = gimp_paint_core_real_pre_paint;
klass->paint = gimp_paint_core_real_paint;
klass->post_paint = gimp_paint_core_real_post_paint;
klass->interpolate = gimp_paint_core_real_interpolate;
klass->get_paint_buffer = gimp_paint_core_real_get_paint_buffer;
klass->push_undo = gimp_paint_core_real_push_undo;
g_object_class_install_property (object_class, PROP_UNDO_DESC,
g_param_spec_string ("undo-desc", NULL, NULL,
_("Paint"),
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_paint_core_init (GimpPaintCore *core)
{
core->ID = global_core_ID++;
}
static void
gimp_paint_core_finalize (GObject *object)
{
GimpPaintCore *core = GIMP_PAINT_CORE (object);
gimp_paint_core_cleanup (core);
g_free (core->undo_desc);
core->undo_desc = NULL;
if (core->stroke_buffer)
{
g_array_free (core->stroke_buffer, TRUE);
core->stroke_buffer = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_paint_core_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpPaintCore *core = GIMP_PAINT_CORE (object);
switch (property_id)
{
case PROP_UNDO_DESC:
g_free (core->undo_desc);
core->undo_desc = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_paint_core_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpPaintCore *core = GIMP_PAINT_CORE (object);
switch (property_id)
{
case PROP_UNDO_DESC:
g_value_set_string (value, core->undo_desc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_paint_core_real_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GError **error)
{
return TRUE;
}
static gboolean
gimp_paint_core_real_pre_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpPaintState paint_state,
guint32 time)
{
return TRUE;
}
static void
gimp_paint_core_real_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GimpPaintState paint_state,
guint32 time)
{
}
static void
gimp_paint_core_real_post_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpPaintState paint_state,
guint32 time)
{
}
static void
gimp_paint_core_real_interpolate (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
guint32 time)
{
gimp_paint_core_paint (core, drawable, paint_options,
GIMP_PAINT_STATE_MOTION, time);
core->last_coords = core->cur_coords;
}
static GeglBuffer *
gimp_paint_core_real_get_paint_buffer (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
gint *paint_buffer_x,
gint *paint_buffer_y)
{
return NULL;
}
static GimpUndo *
gimp_paint_core_real_push_undo (GimpPaintCore *core,
GimpImage *image,
const gchar *undo_desc)
{
return gimp_image_undo_push (image, GIMP_TYPE_PAINT_CORE_UNDO,
GIMP_UNDO_PAINT, undo_desc,
0,
"paint-core", core,
NULL);
}
/* public functions */
void
gimp_paint_core_paint (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpPaintState paint_state,
guint32 time)
{
GimpPaintCoreClass *core_class;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options));
core_class = GIMP_PAINT_CORE_GET_CLASS (core);
if (core_class->pre_paint (core, drawable,
paint_options,
paint_state, time))
{
if (paint_state == GIMP_PAINT_STATE_MOTION)
{
/* Save coordinates for gimp_paint_core_interpolate() */
core->last_paint.x = core->cur_coords.x;
core->last_paint.y = core->cur_coords.y;
}
core_class->paint (core, drawable,
paint_options,
&core->cur_coords,
paint_state, time);
core_class->post_paint (core, drawable,
paint_options,
paint_state, time);
}
}
gboolean
gimp_paint_core_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GError **error)
{
GimpImage *image;
GimpItem *item;
GimpChannel *mask;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (coords != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
item = GIMP_ITEM (drawable);
image = gimp_item_get_image (item);
if (core->stroke_buffer)
{
g_array_free (core->stroke_buffer, TRUE);
core->stroke_buffer = NULL;
}
core->stroke_buffer = g_array_sized_new (TRUE, TRUE,
sizeof (GimpCoords),
STROKE_BUFFER_INIT_SIZE);
/* remember the last stroke's endpoint for later undo */
core->start_coords = core->last_coords;
core->cur_coords = *coords;
if (! GIMP_PAINT_CORE_GET_CLASS (core)->start (core, drawable,
paint_options,
coords, error))
{
return FALSE;
}
/* Allocate the undo structure */
if (core->undo_buffer)
g_object_unref (core->undo_buffer);
core->undo_buffer = gegl_buffer_dup (gimp_drawable_get_buffer (drawable));
/* Allocate the saved proj structure */
if (core->saved_proj_buffer)
{
g_object_unref (core->saved_proj_buffer);
core->saved_proj_buffer = NULL;
}
if (core->use_saved_proj)
{
GeglBuffer *buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (image));
core->saved_proj_buffer = gegl_buffer_dup (buffer);
}
/* Allocate the canvas blocks structure */
if (core->canvas_buffer)
g_object_unref (core->canvas_buffer);
core->canvas_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
babl_format ("Y float"));
/* Get the initial undo extents */
core->x1 = core->x2 = core->cur_coords.x;
core->y1 = core->y2 = core->cur_coords.y;
core->last_paint.x = -1e6;
core->last_paint.y = -1e6;
mask = gimp_image_get_mask (image);
/* don't apply the mask to itself and don't apply an empty mask */
if (GIMP_DRAWABLE (mask) != drawable && ! gimp_channel_is_empty (mask))
{
GeglBuffer *mask_buffer;
gint offset_x;
gint offset_y;
mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
gimp_item_get_offset (item, &offset_x, &offset_y);
core->mask_buffer = g_object_ref (mask_buffer);
core->mask_x_offset = -offset_x;
core->mask_y_offset = -offset_y;
}
else
{
core->mask_buffer = NULL;
}
core->linear_mode = gimp_drawable_get_linear (drawable);
if (paint_options->use_applicator)
{
core->applicator = gimp_applicator_new (NULL, core->linear_mode);
if (core->mask_buffer)
{
gimp_applicator_set_mask_buffer (core->applicator,
core->mask_buffer);
gimp_applicator_set_mask_offset (core->applicator,
core->mask_x_offset,
core->mask_y_offset);
}
gimp_applicator_set_affect (core->applicator,
gimp_drawable_get_active_mask (drawable));
gimp_applicator_set_dest_buffer (core->applicator,
gimp_drawable_get_buffer (drawable));
}
else
{
if (core->comp_buffer)
{
g_object_unref (core->comp_buffer);
core->comp_buffer = NULL;
}
/* Allocate the scratch buffer if there's a component mask */
if (gimp_drawable_get_active_mask (drawable) != GIMP_COMPONENT_ALL)
{
const Babl *format;
if (core->linear_mode)
format = babl_format ("RGBA float");
else
format = babl_format ("R'G'B'A float");
core->comp_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
format);
}
}
/* Freeze the drawable preview so that it isn't constantly updated. */
gimp_viewable_preview_freeze (GIMP_VIEWABLE (drawable));
return TRUE;
}
void
gimp_paint_core_finish (GimpPaintCore *core,
GimpDrawable *drawable,
gboolean push_undo)
{
GimpImage *image;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
if (core->applicator)
{
g_object_unref (core->applicator);
core->applicator = NULL;
}
if (core->stroke_buffer)
{
g_array_free (core->stroke_buffer, TRUE);
core->stroke_buffer = NULL;
}
if (core->mask_buffer)
{
g_object_unref (core->mask_buffer);
core->mask_buffer = NULL;
}
if (core->comp_buffer)
{
g_object_unref (core->comp_buffer);
core->comp_buffer = NULL;
}
image = gimp_item_get_image (GIMP_ITEM (drawable));
/* Determine if any part of the image has been altered--
* if nothing has, then just return...
*/
if ((core->x2 == core->x1) || (core->y2 == core->y1))
{
gimp_viewable_preview_thaw (GIMP_VIEWABLE (drawable));
return;
}
if (push_undo)
{
GeglBuffer *buffer;
gint x, y, width, height;
gimp_rectangle_intersect (core->x1, core->y1,
core->x2 - core->x1, core->y2 - core->y1,
0, 0,
gimp_item_get_width (GIMP_ITEM (drawable)),
gimp_item_get_height (GIMP_ITEM (drawable)),
&x, &y, &width, &height);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_PAINT,
core->undo_desc);
GIMP_PAINT_CORE_GET_CLASS (core)->push_undo (core, image, NULL);
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
gimp_drawable_get_format (drawable));
gegl_buffer_copy (core->undo_buffer,
GEGL_RECTANGLE (x, y, width, height),
buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
gimp_drawable_push_undo (drawable, NULL,
buffer, x, y, width, height);
g_object_unref (buffer);
gimp_image_undo_group_end (image);
}
g_object_unref (core->undo_buffer);
core->undo_buffer = NULL;
if (core->saved_proj_buffer)
{
g_object_unref (core->saved_proj_buffer);
core->saved_proj_buffer = NULL;
}
gimp_viewable_preview_thaw (GIMP_VIEWABLE (drawable));
}
void
gimp_paint_core_cancel (GimpPaintCore *core,
GimpDrawable *drawable)
{
gint x, y;
gint width, height;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
/* Determine if any part of the image has been altered--
* if nothing has, then just return...
*/
if ((core->x2 == core->x1) || (core->y2 == core->y1))
return;
if (gimp_rectangle_intersect (core->x1, core->y1,
core->x2 - core->x1,
core->y2 - core->y1,
0, 0,
gimp_item_get_width (GIMP_ITEM (drawable)),
gimp_item_get_height (GIMP_ITEM (drawable)),
&x, &y, &width, &height))
{
gegl_buffer_copy (core->undo_buffer,
GEGL_RECTANGLE (x, y, width, height),
gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE (x, y, width, height));
}
g_object_unref (core->undo_buffer);
core->undo_buffer = NULL;
if (core->saved_proj_buffer)
{
g_object_unref (core->saved_proj_buffer);
core->saved_proj_buffer = NULL;
}
gimp_drawable_update (drawable, x, y, width, height);
gimp_viewable_preview_thaw (GIMP_VIEWABLE (drawable));
}
void
gimp_paint_core_cleanup (GimpPaintCore *core)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
if (core->undo_buffer)
{
g_object_unref (core->undo_buffer);
core->undo_buffer = NULL;
}
if (core->saved_proj_buffer)
{
g_object_unref (core->saved_proj_buffer);
core->saved_proj_buffer = NULL;
}
if (core->canvas_buffer)
{
g_object_unref (core->canvas_buffer);
core->canvas_buffer = NULL;
}
if (core->paint_buffer)
{
g_object_unref (core->paint_buffer);
core->paint_buffer = NULL;
}
}
void
gimp_paint_core_interpolate (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
guint32 time)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options));
g_return_if_fail (coords != NULL);
core->cur_coords = *coords;
GIMP_PAINT_CORE_GET_CLASS (core)->interpolate (core, drawable,
paint_options, time);
}
void
gimp_paint_core_set_current_coords (GimpPaintCore *core,
const GimpCoords *coords)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (coords != NULL);
core->cur_coords = *coords;
}
void
gimp_paint_core_get_current_coords (GimpPaintCore *core,
GimpCoords *coords)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (coords != NULL);
*coords = core->cur_coords;
}
void
gimp_paint_core_set_last_coords (GimpPaintCore *core,
const GimpCoords *coords)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (coords != NULL);
core->last_coords = *coords;
}
void
gimp_paint_core_get_last_coords (GimpPaintCore *core,
GimpCoords *coords)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (coords != NULL);
*coords = core->last_coords;
}
/**
* gimp_paint_core_round_line:
* @core: the #GimpPaintCore
* @options: the #GimpPaintOptions to use
* @constrain_15_degrees: the modifier state
*
* Adjusts core->last_coords and core_cur_coords in preparation to
* drawing a straight line. If @center_pixels is TRUE the endpoints
* get pushed to the center of the pixels. This avoids artefacts
* for e.g. the hard mode. The rounding of the slope to 15 degree
* steps if ctrl is pressed happens, as does rounding the start and
* end coordinates (which may be fractional in high zoom modes) to
* the center of pixels.
**/
void
gimp_paint_core_round_line (GimpPaintCore *core,
GimpPaintOptions *paint_options,
gboolean constrain_15_degrees)
{
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options));
if (gimp_paint_options_get_brush_mode (paint_options) == GIMP_BRUSH_HARD)
{
core->last_coords.x = floor (core->last_coords.x) + 0.5;
core->last_coords.y = floor (core->last_coords.y) + 0.5;
core->cur_coords.x = floor (core->cur_coords.x ) + 0.5;
core->cur_coords.y = floor (core->cur_coords.y ) + 0.5;
}
if (constrain_15_degrees)
gimp_constrain_line (core->last_coords.x, core->last_coords.y,
&core->cur_coords.x, &core->cur_coords.y,
GIMP_CONSTRAIN_LINE_15_DEGREES);
}
/* protected functions */
GeglBuffer *
gimp_paint_core_get_paint_buffer (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
gint *paint_buffer_x,
gint *paint_buffer_y)
{
GeglBuffer *paint_buffer;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), NULL);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), NULL);
g_return_val_if_fail (coords != NULL, NULL);
g_return_val_if_fail (paint_buffer_x != NULL, NULL);
g_return_val_if_fail (paint_buffer_y != NULL, NULL);
paint_buffer =
GIMP_PAINT_CORE_GET_CLASS (core)->get_paint_buffer (core, drawable,
paint_options,
coords,
paint_buffer_x,
paint_buffer_y);
core->paint_buffer_x = *paint_buffer_x;
core->paint_buffer_y = *paint_buffer_y;
return paint_buffer;
}
GeglBuffer *
gimp_paint_core_get_orig_image (GimpPaintCore *core)
{
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), NULL);
g_return_val_if_fail (core->undo_buffer != NULL, NULL);
return core->undo_buffer;
}
GeglBuffer *
gimp_paint_core_get_orig_proj (GimpPaintCore *core)
{
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), NULL);
g_return_val_if_fail (core->saved_proj_buffer != NULL, NULL);
return core->saved_proj_buffer;
}
void
gimp_paint_core_paste (GimpPaintCore *core,
const GimpTempBuf *paint_mask,
gint paint_mask_offset_x,
gint paint_mask_offset_y,
GimpDrawable *drawable,
gdouble paint_opacity,
gdouble image_opacity,
GimpLayerModeEffects paint_mode,
GimpPaintApplicationMode mode)
{
gint width = gegl_buffer_get_width (core->paint_buffer);
gint height = gegl_buffer_get_height (core->paint_buffer);
if (core->applicator)
{
/* If the mode is CONSTANT:
* combine the canvas buf, the paint mask to the canvas buffer
*/
if (mode == GIMP_PAINT_CONSTANT)
{
/* Some tools (ink) paint the mask to paint_core->canvas_buffer
* directly. Don't need to copy it in this case.
*/
if (paint_mask != NULL)
{
GeglBuffer *paint_mask_buffer =
gimp_temp_buf_create_buffer ((GimpTempBuf *) paint_mask);
gimp_gegl_combine_mask_weird (paint_mask_buffer,
GEGL_RECTANGLE (paint_mask_offset_x,
paint_mask_offset_y,
width, height),
core->canvas_buffer,
GEGL_RECTANGLE (core->paint_buffer_x,
core->paint_buffer_y,
width, height),
paint_opacity,
GIMP_IS_AIRBRUSH (core));
g_object_unref (paint_mask_buffer);
}
gimp_gegl_apply_mask (core->canvas_buffer,
GEGL_RECTANGLE (core->paint_buffer_x,
core->paint_buffer_y,
width, height),
core->paint_buffer,
GEGL_RECTANGLE (0, 0, width, height),
1.0);
gimp_applicator_set_src_buffer (core->applicator,
core->undo_buffer);
}
/* Otherwise:
* combine the canvas buf and the paint mask to the canvas buf
*/
else
{
GeglBuffer *paint_mask_buffer =
gimp_temp_buf_create_buffer ((GimpTempBuf *) paint_mask);
gimp_gegl_apply_mask (paint_mask_buffer,
GEGL_RECTANGLE (paint_mask_offset_x,
paint_mask_offset_y,
width, height),
core->paint_buffer,
GEGL_RECTANGLE (0, 0, width, height),
paint_opacity);
g_object_unref (paint_mask_buffer);
gimp_applicator_set_src_buffer (core->applicator,
gimp_drawable_get_buffer (drawable));
}
gimp_applicator_set_apply_buffer (core->applicator,
core->paint_buffer);
gimp_applicator_set_apply_offset (core->applicator,
core->paint_buffer_x,
core->paint_buffer_y);
gimp_applicator_set_mode (core->applicator,
image_opacity, paint_mode);
/* apply the paint area to the image */
gimp_applicator_blit (core->applicator,
GEGL_RECTANGLE (core->paint_buffer_x,
core->paint_buffer_y,
width, height));
}
else
{
GimpTempBuf *paint_buf = gimp_gegl_buffer_get_temp_buf (core->paint_buffer);
GeglBuffer *dest_buffer;
GeglBuffer *src_buffer;
if (! paint_buf)
return;
if (core->comp_buffer)
dest_buffer = core->comp_buffer;
else
dest_buffer = gimp_drawable_get_buffer (drawable);
if (mode == GIMP_PAINT_CONSTANT)
{
/* This step is skipped by the ink tool, which writes
* directly to canvas_buffer
*/
if (paint_mask != NULL)
{
/* Mix paint mask and canvas_buffer */
combine_paint_mask_to_canvas_mask (paint_mask,
paint_mask_offset_x,
paint_mask_offset_y,
core->canvas_buffer,
core->paint_buffer_x,
core->paint_buffer_y,
paint_opacity,
GIMP_IS_AIRBRUSH (core));
}
/* Write canvas_buffer to paint_buf */
canvas_buffer_to_paint_buf_alpha (paint_buf,
core->canvas_buffer,
core->paint_buffer_x,
core->paint_buffer_y);
/* undo buf -> paint_buf -> dest_buffer */
src_buffer = core->undo_buffer;
}
else
{
g_return_if_fail (paint_mask);
/* Write paint_mask to paint_buf, does not modify canvas_buffer */
paint_mask_to_paint_buffer (paint_mask,
paint_mask_offset_x,
paint_mask_offset_y,
paint_buf,
paint_opacity);
/* dest_buffer -> paint_buf -> dest_buffer */
src_buffer = dest_buffer;
}
do_layer_blend (src_buffer,
dest_buffer,
paint_buf,
core->mask_buffer,
image_opacity,
core->paint_buffer_x,
core->paint_buffer_y,
core->mask_x_offset,
core->mask_y_offset,
core->linear_mode,
paint_mode);
if (core->comp_buffer)
{
mask_components_onto (src_buffer,
core->comp_buffer,
gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE(core->paint_buffer_x,
core->paint_buffer_y,
width,
height),
gimp_drawable_get_active_mask (drawable),
core->linear_mode);
}
}
/* Update the undo extents */
core->x1 = MIN (core->x1, core->paint_buffer_x);
core->y1 = MIN (core->y1, core->paint_buffer_y);
core->x2 = MAX (core->x2, core->paint_buffer_x + width);
core->y2 = MAX (core->y2, core->paint_buffer_y + height);
/* Update the drawable */
gimp_drawable_update (drawable,
core->paint_buffer_x,
core->paint_buffer_y,
width, height);
}
/* This works similarly to gimp_paint_core_paste. However, instead of
* combining the canvas to the paint core drawable using one of the
* combination modes, it uses a "replace" mode (i.e. transparent
* pixels in the canvas erase the paint core drawable).
* When not drawing on alpha-enabled images, it just paints using
* NORMAL mode.
*/
void
gimp_paint_core_replace (GimpPaintCore *core,
const GimpTempBuf *paint_mask,
gint paint_mask_offset_x,
gint paint_mask_offset_y,
GimpDrawable *drawable,
gdouble paint_opacity,
gdouble image_opacity,
GimpPaintApplicationMode mode)
{
GeglRectangle mask_rect;
GeglBuffer *paint_mask_buffer;
gint width, height;
if (! gimp_drawable_has_alpha (drawable))
{
gimp_paint_core_paste (core, paint_mask,
paint_mask_offset_x,
paint_mask_offset_y,
drawable,
paint_opacity,
image_opacity, GIMP_NORMAL_MODE,
mode);
return;
}
width = gegl_buffer_get_width (core->paint_buffer);
height = gegl_buffer_get_height (core->paint_buffer);
if (mode == GIMP_PAINT_CONSTANT &&
/* Some tools (ink) paint the mask to paint_core->canvas_buffer
* directly. Don't need to copy it in this case.
*/
paint_mask != NULL)
{
if (core->applicator)
{
paint_mask_buffer =
gimp_temp_buf_create_buffer ((GimpTempBuf *) paint_mask);
/* combine the paint mask and the canvas buffer */
gimp_gegl_combine_mask_weird (paint_mask_buffer,
GEGL_RECTANGLE (paint_mask_offset_x,
paint_mask_offset_y,
width, height),
core->canvas_buffer,
GEGL_RECTANGLE (core->paint_buffer_x,
core->paint_buffer_y,
width, height),
paint_opacity,
GIMP_IS_AIRBRUSH (core));
g_object_unref (paint_mask_buffer);
}
else
{
/* Mix paint mask and canvas_buffer */
combine_paint_mask_to_canvas_mask (paint_mask,
paint_mask_offset_x,
paint_mask_offset_y,
core->canvas_buffer,
core->paint_buffer_x,
core->paint_buffer_y,
paint_opacity,
GIMP_IS_AIRBRUSH (core));
}
/* initialize the maskPR from the canvas buffer */
paint_mask_buffer = g_object_ref (core->canvas_buffer);
mask_rect = *GEGL_RECTANGLE (core->paint_buffer_x,
core->paint_buffer_y,
width, height);
}
else
{
paint_mask_buffer =
gimp_temp_buf_create_buffer ((GimpTempBuf *) paint_mask);
mask_rect = *GEGL_RECTANGLE (paint_mask_offset_x,
paint_mask_offset_y,
width, height);
}
/* apply the paint area to the image */
gimp_drawable_replace_buffer (drawable, core->paint_buffer,
GEGL_RECTANGLE (0, 0, width, height),
FALSE, NULL,
image_opacity,
paint_mask_buffer, &mask_rect,
core->paint_buffer_x,
core->paint_buffer_y);
g_object_unref (paint_mask_buffer);
/* Update the undo extents */
core->x1 = MIN (core->x1, core->paint_buffer_x);
core->y1 = MIN (core->y1, core->paint_buffer_y);
core->x2 = MAX (core->x2, core->paint_buffer_x + width);
core->y2 = MAX (core->y2, core->paint_buffer_y + height);
/* Update the drawable */
gimp_drawable_update (drawable,
core->paint_buffer_x,
core->paint_buffer_y,
width, height);
}
/**
* Smooth and store coords in the stroke buffer
*/
void
gimp_paint_core_smooth_coords (GimpPaintCore *core,
GimpPaintOptions *paint_options,
GimpCoords *coords)
{
GimpSmoothingOptions *smoothing_options = paint_options->smoothing_options;
GArray *history = core->stroke_buffer;
if (core->stroke_buffer == NULL)
return; /* Paint core has not initalized yet */
if (smoothing_options->use_smoothing &&
smoothing_options->smoothing_quality > 0)
{
gint i;
guint length;
gint min_index;
gdouble gaussian_weight = 0.0;
gdouble gaussian_weight2 = SQR (smoothing_options->smoothing_factor);
gdouble velocity_sum = 0.0;
gdouble scale_sum = 0.0;
g_array_append_val (history, *coords);
if (history->len < 2)
return; /* Just dont bother, nothing to do */
coords->x = coords->y = 0.0;
length = MIN (smoothing_options->smoothing_quality, history->len);
min_index = history->len - length;
if (gaussian_weight2 != 0.0)
gaussian_weight = 1 / (sqrt (2 * G_PI) * smoothing_options->smoothing_factor);
for (i = history->len - 1; i >= min_index; i--)
{
gdouble rate = 0.0;
GimpCoords *next_coords = &g_array_index (history,
GimpCoords, i);
if (gaussian_weight2 != 0.0)
{
/* We use gaussian function with velocity as a window function */
velocity_sum += next_coords->velocity * 100;
rate = gaussian_weight * exp (-velocity_sum * velocity_sum /
(2 * gaussian_weight2));
}
scale_sum += rate;
coords->x += rate * next_coords->x;
coords->y += rate * next_coords->y;
}
if (scale_sum != 0.0)
{
coords->x /= scale_sum;
coords->y /= scale_sum;
}
}
}
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