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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
*
* 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 <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "paint-types.h"
#include "base/pixel-region.h"
#include "base/temp-buf.h"
#include "base/tile-manager.h"
#include "base/tile.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimp.h"
#include "core/gimp-utils.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimppickable.h"
#include "core/gimpprojection.h"
#include "gimppaintcore.h"
#include "gimppaintcoreundo.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 TempBuf * gimp_paint_core_real_get_paint_area (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *options,
const GimpCoords *coords);
static GimpUndo* gimp_paint_core_real_push_undo (GimpPaintCore *core,
GimpImage *image,
const gchar *undo_desc);
static void paint_mask_to_canvas_tiles (GimpPaintCore *core,
PixelRegion *paint_maskPR,
gdouble paint_opacity);
static void paint_mask_to_canvas_buf (GimpPaintCore *core,
PixelRegion *paint_maskPR,
gdouble paint_opacity);
static void canvas_tiles_to_canvas_buf (GimpPaintCore *core);
static void gimp_paint_core_smooth_coords (GimpPaintCore *core,
GimpPaintOptions *paint_options,
GimpCoords *coords);
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_area = gimp_paint_core_real_get_paint_area;
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++;
core->undo_desc = NULL;
core->distance = 0.0;
core->pixel_dist = 0.0;
core->x1 = 0;
core->y1 = 0;
core->x2 = 0;
core->y2 = 0;
core->use_saved_proj = FALSE;
core->undo_tiles = NULL;
core->saved_proj_tiles = NULL;
core->canvas_tiles = NULL;
core->orig_buf = NULL;
core->orig_proj_buf = NULL;
core->canvas_buf = NULL;
}
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;
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 TempBuf *
gimp_paint_core_real_get_paint_area (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
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;
}
gimp_paint_core_smooth_coords (core,
paint_options,
&core->cur_coords);
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)
{
GimpItem *item;
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);
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);
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_tiles)
tile_manager_unref (core->undo_tiles);
core->undo_tiles = tile_manager_new (gimp_item_get_width (item),
gimp_item_get_height (item),
gimp_drawable_bytes (drawable));
/* Allocate the saved proj structure */
if (core->saved_proj_tiles)
tile_manager_unref (core->saved_proj_tiles);
core->saved_proj_tiles = NULL;
if (core->use_saved_proj)
{
GimpImage *image = gimp_item_get_image (item);
GimpPickable *pickable = GIMP_PICKABLE (gimp_image_get_projection (image));
TileManager *tiles = gimp_pickable_get_tiles (pickable);
core->saved_proj_tiles = tile_manager_new (tile_manager_width (tiles),
tile_manager_height (tiles),
tile_manager_bpp (tiles));
}
/* Allocate the canvas blocks structure */
if (core->canvas_tiles)
tile_manager_unref (core->canvas_tiles);
core->canvas_tiles = tile_manager_new (gimp_item_get_width (item),
gimp_item_get_height (item),
1);
/* 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;
/* 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->stroke_buffer)
{
g_array_free (core->stroke_buffer, TRUE);
core->stroke_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)
{
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_PAINT,
core->undo_desc);
GIMP_PAINT_CORE_GET_CLASS (core)->push_undo (core, image, NULL);
gimp_drawable_push_undo (drawable, NULL,
core->x1, core->y1,
core->x2 - core->x1, core->y2 - core->y1,
core->undo_tiles,
TRUE);
gimp_image_undo_group_end (image);
}
tile_manager_unref (core->undo_tiles);
core->undo_tiles = NULL;
if (core->saved_proj_tiles)
{
tile_manager_unref (core->saved_proj_tiles);
core->saved_proj_tiles = NULL;
}
gimp_viewable_preview_thaw (GIMP_VIEWABLE (drawable));
}
static void
gimp_paint_core_copy_valid_tiles (TileManager *src_tiles,
TileManager *dest_tiles,
gint x,
gint y,
gint w,
gint h)
{
Tile *src_tile;
gint i, j;
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
src_tile = tile_manager_get_tile (src_tiles,
j, i, FALSE, FALSE);
if (tile_is_valid (src_tile))
{
src_tile = tile_manager_get_tile (src_tiles,
j, i, TRUE, FALSE);
tile_manager_map_tile (dest_tiles, j, i, src_tile);
tile_release (src_tile, FALSE);
}
}
}
}
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))
{
gimp_paint_core_copy_valid_tiles (core->undo_tiles,
gimp_drawable_get_tiles (drawable),
x, y, width, height);
}
tile_manager_unref (core->undo_tiles);
core->undo_tiles = NULL;
if (core->saved_proj_tiles)
{
tile_manager_unref (core->saved_proj_tiles);
core->saved_proj_tiles = 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_tiles)
{
tile_manager_unref (core->undo_tiles);
core->undo_tiles = NULL;
}
if (core->saved_proj_tiles)
{
tile_manager_unref (core->saved_proj_tiles);
core->saved_proj_tiles = NULL;
}
if (core->canvas_tiles)
{
tile_manager_unref (core->canvas_tiles);
core->canvas_tiles = NULL;
}
if (core->orig_buf)
{
temp_buf_free (core->orig_buf);
core->orig_buf = NULL;
}
if (core->orig_proj_buf)
{
temp_buf_free (core->orig_proj_buf);
core->orig_proj_buf = NULL;
}
if (core->canvas_buf)
{
temp_buf_free (core->canvas_buf);
core->canvas_buf = 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 */
TempBuf *
gimp_paint_core_get_paint_area (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
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);
return GIMP_PAINT_CORE_GET_CLASS (core)->get_paint_area (core, drawable,
paint_options,
coords);
}
TempBuf *
gimp_paint_core_get_orig_image (GimpPaintCore *core,
GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
PixelRegion srcPR;
PixelRegion destPR;
Tile *undo_tile;
gboolean release_tile;
gint h;
gint pixelwidth;
gint drawable_width;
gint drawable_height;
const guchar *s;
guchar *d;
gpointer pr;
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 (core->undo_tiles != NULL, NULL);
core->orig_buf = temp_buf_resize (core->orig_buf,
gimp_drawable_bytes (drawable),
x, y, width, height);
drawable_width = gimp_item_get_width (GIMP_ITEM (drawable));
drawable_height = gimp_item_get_height (GIMP_ITEM (drawable));
gimp_rectangle_intersect (x, y,
width, height,
0, 0,
drawable_width, drawable_height,
&x, &y,
&width, &height);
/* configure the pixel regions */
pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
x, y, width, height,
FALSE);
pixel_region_init_temp_buf (&destPR, core->orig_buf,
x - core->orig_buf->x,
y - core->orig_buf->y,
width, height);
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
/* If the undo tile corresponding to this location is valid, use it */
undo_tile = tile_manager_get_tile (core->undo_tiles,
srcPR.x, srcPR.y,
FALSE, FALSE);
if (tile_is_valid (undo_tile))
{
release_tile = TRUE;
undo_tile = tile_manager_get_tile (core->undo_tiles,
srcPR.x, srcPR.y,
TRUE, FALSE);
s = tile_data_pointer (undo_tile, srcPR.x, srcPR.y);
}
else
{
release_tile = FALSE;
s = srcPR.data;
}
d = destPR.data;
pixelwidth = srcPR.w * srcPR.bytes;
h = srcPR.h;
while (h --)
{
memcpy (d, s, pixelwidth);
s += srcPR.rowstride;
d += destPR.rowstride;
}
if (release_tile)
tile_release (undo_tile, FALSE);
}
return core->orig_buf;
}
TempBuf *
gimp_paint_core_get_orig_proj (GimpPaintCore *core,
GimpPickable *pickable,
gint x,
gint y,
gint width,
gint height)
{
TileManager *src_tiles;
PixelRegion srcPR;
PixelRegion destPR;
Tile *saved_tile;
gboolean release_tile;
gint h;
gint pixelwidth;
gint pickable_width;
gint pickable_height;
const guchar *s;
guchar *d;
gpointer pr;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), NULL);
g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
g_return_val_if_fail (core->saved_proj_tiles != NULL, NULL);
core->orig_proj_buf = temp_buf_resize (core->orig_proj_buf,
gimp_pickable_get_bytes (pickable),
x, y, width, height);
src_tiles = gimp_pickable_get_tiles (pickable);
pickable_width = tile_manager_width (src_tiles);
pickable_height = tile_manager_height (src_tiles);
gimp_rectangle_intersect (x, y,
width, height,
0, 0,
pickable_width, pickable_height,
&x, &y,
&width, &height);
/* configure the pixel regions */
pixel_region_init (&srcPR, src_tiles,
x, y, width, height,
FALSE);
pixel_region_init_temp_buf (&destPR, core->orig_proj_buf,
x - core->orig_proj_buf->x,
y - core->orig_proj_buf->y,
width, height);
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
/* If the saved tile corresponding to this location is valid, use it */
saved_tile = tile_manager_get_tile (core->saved_proj_tiles,
srcPR.x, srcPR.y,
FALSE, FALSE);
if (tile_is_valid (saved_tile))
{
release_tile = TRUE;
saved_tile = tile_manager_get_tile (core->saved_proj_tiles,
srcPR.x, srcPR.y,
TRUE, FALSE);
s = tile_data_pointer (saved_tile, srcPR.x, srcPR.y);
}
else
{
release_tile = FALSE;
s = srcPR.data;
}
d = destPR.data;
pixelwidth = srcPR.w * srcPR.bytes;
h = srcPR.h;
while (h --)
{
memcpy (d, s, pixelwidth);
s += srcPR.rowstride;
d += destPR.rowstride;
}
if (release_tile)
tile_release (saved_tile, FALSE);
}
return core->orig_proj_buf;
}
void
gimp_paint_core_paste (GimpPaintCore *core,
PixelRegion *paint_maskPR,
GimpDrawable *drawable,
gdouble paint_opacity,
gdouble image_opacity,
GimpLayerModeEffects paint_mode,
GimpPaintApplicationMode mode)
{
TileManager *alt = NULL;
PixelRegion srcPR;
/* set undo blocks */
gimp_paint_core_validate_undo_tiles (core, drawable,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height);
if (core->use_saved_proj)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
GimpProjection *projection = gimp_image_get_projection (image);
gint off_x;
gint off_y;
gint x, y;
gint w, h;
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
if (gimp_rectangle_intersect (core->canvas_buf->x + off_x,
core->canvas_buf->y + off_y,
core->canvas_buf->width,
core->canvas_buf->height,
0, 0,
tile_manager_width (core->saved_proj_tiles),
tile_manager_height (core->saved_proj_tiles),
&x, &y, &w, &h))
{
gimp_paint_core_validate_saved_proj_tiles (core,
GIMP_PICKABLE (projection),
x, y, w, h);
}
}
/* If the mode is CONSTANT:
* combine the canvas buf, the paint mask to the canvas tiles
*/
if (mode == GIMP_PAINT_CONSTANT)
{
/* Some tools (ink) paint the mask to paint_core->canvas_tiles
* directly. Don't need to copy it in this case.
*/
if (paint_maskPR->tiles != core->canvas_tiles)
{
/* initialize any invalid canvas tiles */
gimp_paint_core_validate_canvas_tiles (core,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height);
paint_mask_to_canvas_tiles (core, paint_maskPR, paint_opacity);
}
canvas_tiles_to_canvas_buf (core);
alt = core->undo_tiles;
}
/* Otherwise:
* combine the canvas buf and the paint mask to the canvas buf
*/
else
{
paint_mask_to_canvas_buf (core, paint_maskPR, paint_opacity);
}
/* intialize canvas buf source pixel regions */
pixel_region_init_temp_buf (&srcPR, core->canvas_buf,
0, 0,
core->canvas_buf->width,
core->canvas_buf->height);
/* apply the paint area to the image */
gimp_drawable_apply_region (drawable, &srcPR,
FALSE, NULL,
image_opacity, paint_mode,
alt, /* specify an alternative src1 */
NULL,
core->canvas_buf->x,
core->canvas_buf->y);
/* Update the undo extents */
core->x1 = MIN (core->x1, core->canvas_buf->x);
core->y1 = MIN (core->y1, core->canvas_buf->y);
core->x2 = MAX (core->x2, core->canvas_buf->x + core->canvas_buf->width);
core->y2 = MAX (core->y2, core->canvas_buf->y + core->canvas_buf->height);
/* Update the drawable */
gimp_drawable_update (drawable,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->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,
PixelRegion *paint_maskPR,
GimpDrawable *drawable,
gdouble paint_opacity,
gdouble image_opacity,
GimpPaintApplicationMode mode)
{
PixelRegion srcPR;
if (! gimp_drawable_has_alpha (drawable))
{
gimp_paint_core_paste (core, paint_maskPR, drawable,
paint_opacity,
image_opacity, GIMP_NORMAL_MODE,
mode);
return;
}
/* set undo blocks */
gimp_paint_core_validate_undo_tiles (core, drawable,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height);
if (mode == GIMP_PAINT_CONSTANT)
{
/* Some tools (ink) paint the mask to paint_core->canvas_tiles
* directly. Don't need to copy it in this case.
*/
if (paint_maskPR->tiles != core->canvas_tiles)
{
/* initialize any invalid canvas tiles */
gimp_paint_core_validate_canvas_tiles (core,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height);
/* combine the paint mask and the canvas tiles */
paint_mask_to_canvas_tiles (core, paint_maskPR, paint_opacity);
/* initialize the maskPR from the canvas tiles */
pixel_region_init (paint_maskPR, core->canvas_tiles,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height,
FALSE);
}
}
else
{
/* The mask is just the paint_maskPR */
}
/* intialize canvas buf source pixel regions */
pixel_region_init_temp_buf (&srcPR, core->canvas_buf,
0, 0,
core->canvas_buf->width,
core->canvas_buf->height);
/* apply the paint area to the image */
gimp_drawable_replace_region (drawable, &srcPR,
FALSE, NULL,
image_opacity,
paint_maskPR,
core->canvas_buf->x,
core->canvas_buf->y);
/* Update the undo extents */
core->x1 = MIN (core->x1, core->canvas_buf->x);
core->y1 = MIN (core->y1, core->canvas_buf->y);
core->x2 = MAX (core->x2, core->canvas_buf->x + core->canvas_buf->width) ;
core->y2 = MAX (core->y2, core->canvas_buf->y + core->canvas_buf->height) ;
/* Update the drawable */
gimp_drawable_update (drawable,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height);
}
static void
canvas_tiles_to_canvas_buf (GimpPaintCore *core)
{
PixelRegion srcPR;
PixelRegion maskPR;
/* combine the canvas tiles and the canvas buf */
pixel_region_init_temp_buf (&srcPR, core->canvas_buf,
0, 0,
core->canvas_buf->width,
core->canvas_buf->height);
pixel_region_init (&maskPR, core->canvas_tiles,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height,
FALSE);
/* apply the canvas tiles to the canvas buf */
apply_mask_to_region (&srcPR, &maskPR, OPAQUE_OPACITY);
}
static void
paint_mask_to_canvas_tiles (GimpPaintCore *core,
PixelRegion *paint_maskPR,
gdouble paint_opacity)
{
PixelRegion srcPR;
/* combine the paint mask and the canvas tiles */
pixel_region_init (&srcPR, core->canvas_tiles,
core->canvas_buf->x,
core->canvas_buf->y,
core->canvas_buf->width,
core->canvas_buf->height,
TRUE);
/* combine the mask to the canvas tiles */
combine_mask_and_region (&srcPR, paint_maskPR,
paint_opacity * 255.999, GIMP_IS_AIRBRUSH (core));
}
static void
paint_mask_to_canvas_buf (GimpPaintCore *core,
PixelRegion *paint_maskPR,
gdouble paint_opacity)
{
PixelRegion srcPR;
/* combine the canvas buf and the paint mask to the canvas buf */
pixel_region_init_temp_buf (&srcPR, core->canvas_buf,
0, 0,
core->canvas_buf->width,
core->canvas_buf->height);
/* apply the mask */
apply_mask_to_region (&srcPR, paint_maskPR, paint_opacity * 255.999);
}
void
gimp_paint_core_validate_undo_tiles (GimpPaintCore *core,
GimpDrawable *drawable,
gint x,
gint y,
gint w,
gint h)
{
gint i, j;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (core->undo_tiles != NULL);
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
Tile *dest_tile = tile_manager_get_tile (core->undo_tiles,
j, i, FALSE, FALSE);
if (! tile_is_valid (dest_tile))
{
Tile *src_tile =
tile_manager_get_tile (gimp_drawable_get_tiles (drawable),
j, i, TRUE, FALSE);
tile_manager_map_tile (core->undo_tiles, j, i, src_tile);
tile_release (src_tile, FALSE);
}
}
}
}
void
gimp_paint_core_validate_saved_proj_tiles (GimpPaintCore *core,
GimpPickable *pickable,
gint x,
gint y,
gint w,
gint h)
{
gint i, j;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (GIMP_IS_PICKABLE (pickable));
g_return_if_fail (core->saved_proj_tiles != NULL);
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
Tile *dest_tile = tile_manager_get_tile (core->saved_proj_tiles,
j, i, FALSE, FALSE);
if (! tile_is_valid (dest_tile))
{
Tile *src_tile =
tile_manager_get_tile (gimp_pickable_get_tiles (pickable),
j, i, TRUE, FALSE);
tile_manager_map_tile (core->saved_proj_tiles, j, i, src_tile);
tile_release (src_tile, FALSE);
}
}
}
}
void
gimp_paint_core_validate_canvas_tiles (GimpPaintCore *core,
gint x,
gint y,
gint w,
gint h)
{
gint i, j;
g_return_if_fail (GIMP_IS_PAINT_CORE (core));
g_return_if_fail (core->canvas_tiles != NULL);
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
Tile *tile = tile_manager_get_tile (core->canvas_tiles, j, i,
FALSE, FALSE);
if (! tile_is_valid (tile))
{
tile = tile_manager_get_tile (core->canvas_tiles, j, i,
TRUE, TRUE);
memset (tile_data_pointer (tile, 0, 0), 0, tile_size (tile));
tile_release (tile, TRUE);
}
}
}
}
static 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 (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);
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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