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gimp/app/paint/gimppaintcore.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <glib-object.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/gimpcontainer.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimppaintinfo.h"
#include "gimppaintcore.h"
#include "gimppaintcore-undo.h"
#include "gimppaintoptions.h"
#include "gimpairbrush.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_paint_core_class_init (GimpPaintCoreClass *klass);
static void gimp_paint_core_init (GimpPaintCore *core);
static void gimp_paint_core_finalize (GObject *object);
static gboolean gimp_paint_core_real_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpCoords *coords);
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,
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);
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 GimpObjectClass *parent_class = NULL;
static gint global_core_ID = 1;
GType
gimp_paint_core_get_type (void)
{
static GType core_type = 0;
if (! core_type)
{
static const GTypeInfo core_info =
{
sizeof (GimpPaintCoreClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_paint_core_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPaintCore),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_paint_core_init,
};
core_type = g_type_register_static (GIMP_TYPE_OBJECT,
"GimpPaintCore",
&core_info, 0);
}
return core_type;
}
static void
gimp_paint_core_class_init (GimpPaintCoreClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_paint_core_finalize;
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;
}
static void
gimp_paint_core_init (GimpPaintCore *core)
{
core->ID = global_core_ID++;
core->distance = 0.0;
core->pixel_dist = 0.0;
core->x1 = 0;
core->y1 = 0;
core->x2 = 0;
core->y2 = 0;
core->use_pressure = FALSE;
core->undo_tiles = NULL;
core->canvas_tiles = NULL;
core->orig_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_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_paint_core_real_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpCoords *coords)
{
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,
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)
{
return NULL;
}
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,
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,
GimpCoords *coords)
{
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);
item = GIMP_ITEM (drawable);
core->cur_coords = *coords;
if (! GIMP_PAINT_CORE_GET_CLASS (core)->start (core, drawable,
paint_options,
coords))
{
return FALSE;
}
/* Allocate the undo structure */
if (core->undo_tiles)
tile_manager_unref (core->undo_tiles);
core->undo_tiles = tile_manager_new (gimp_item_width (item),
gimp_item_height (item),
gimp_drawable_bytes (drawable));
/* Allocate the canvas blocks structure */
if (core->canvas_tiles)
tile_manager_unref (core->canvas_tiles);
core->canvas_tiles = tile_manager_new (gimp_item_width (item),
gimp_item_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;
return TRUE;
}
void
gimp_paint_core_finish (GimpPaintCore *core,
GimpDrawable *drawable)
{
GimpPaintInfo *paint_info;
GimpImage *gimage;
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)));
gimage = 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))
return;
paint_info = (GimpPaintInfo *)
gimp_container_get_child_by_name (gimage->gimp->paint_info_list,
g_type_name (G_TYPE_FROM_INSTANCE (core)));
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_PAINT,
paint_info ? paint_info->blurb : _("Paint"));
GIMP_PAINT_CORE_GET_CLASS (core)->push_undo (core, gimage, NULL);
gimp_drawable_push_undo (drawable, NULL,
core->x1, core->y1,
core->x2, core->y2,
core->undo_tiles,
TRUE);
tile_manager_unref (core->undo_tiles);
core->undo_tiles = NULL;
gimp_image_undo_group_end (gimage);
/* invalidate the previews -- have to do it here, because
* it is not done during the actual painting.
*/
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (drawable));
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage));
}
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)
{
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;
gimp_paint_core_copy_valid_tiles (core->undo_tiles,
gimp_drawable_data (drawable),
core->x1, core->y1,
core->x2 - core->x1,
core->y2 - core->y1);
tile_manager_unref (core->undo_tiles);
core->undo_tiles = NULL;
gimp_drawable_update (drawable,
core->x1, core->y1,
core->x2 - core->x1, core->y2 - core->y1);
}
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->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->canvas_buf)
{
temp_buf_free (core->canvas_buf);
core->canvas_buf = NULL;
}
}
void
gimp_paint_core_interpolate (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
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));
GIMP_PAINT_CORE_GET_CLASS (core)->interpolate (core, drawable,
paint_options, time);
}
/* protected functions */
TempBuf *
gimp_paint_core_get_paint_area (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
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);
return GIMP_PAINT_CORE_GET_CLASS (core)->get_paint_area (core, drawable,
paint_options);
}
TempBuf *
gimp_paint_core_get_orig_image (GimpPaintCore *core,
GimpDrawable *drawable,
gint x1,
gint y1,
gint x2,
gint y2)
{
PixelRegion srcPR;
PixelRegion destPR;
Tile *undo_tile;
gboolean release_tile;
gint h;
gint pixelwidth;
gint drawable_width;
gint drawable_height;
guchar *s;
guchar *d;
gpointer pr;
core->orig_buf = temp_buf_resize (core->orig_buf,
gimp_drawable_bytes (drawable),
x1, y1,
(x2 - x1), (y2 - y1));
drawable_width = gimp_item_width (GIMP_ITEM (drawable));
drawable_height = gimp_item_height (GIMP_ITEM (drawable));
x1 = CLAMP (x1, 0, drawable_width);
y1 = CLAMP (y1, 0, drawable_height);
x2 = CLAMP (x2, 0, drawable_width);
y2 = CLAMP (y2, 0, drawable_height);
/* configure the pixel regions */
pixel_region_init (&srcPR, gimp_drawable_data (drawable),
x1, y1,
(x2 - x1), (y2 - y1),
FALSE);
destPR.bytes = core->orig_buf->bytes;
destPR.x = 0;
destPR.y = 0;
destPR.w = (x2 - x1);
destPR.h = (y2 - y1);
destPR.rowstride = core->orig_buf->bytes * core->orig_buf->width;
destPR.data = (temp_buf_data (core->orig_buf) +
(y1 - core->orig_buf->y) * destPR.rowstride +
(x1 - core->orig_buf->x) * destPR.bytes);
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 = ((guchar *) tile_data_pointer (undo_tile, 0, 0) +
srcPR.rowstride * (srcPR.y % TILE_HEIGHT) +
srcPR.bytes * (srcPR.x % TILE_WIDTH)); /* dubious... */
}
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;
}
void
gimp_paint_core_paste (GimpPaintCore *core,
PixelRegion *paint_maskPR,
GimpDrawable *drawable,
gdouble paint_opacity,
gdouble image_opacity,
GimpLayerModeEffects paint_mode,
GimpPaintApplicationMode mode)
{
GimpImage *gimage;
PixelRegion srcPR;
TileManager *alt = NULL;
gint offx;
gint offy;
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
/* 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 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 */
srcPR.bytes = core->canvas_buf->bytes;
srcPR.x = 0;
srcPR.y = 0;
srcPR.w = core->canvas_buf->width;
srcPR.h = core->canvas_buf->height;
srcPR.rowstride = core->canvas_buf->width * core->canvas_buf->bytes;
srcPR.data = temp_buf_data (core->canvas_buf);
/* apply the paint area to the gimage */
gimp_drawable_apply_region (drawable, &srcPR,
FALSE, NULL,
image_opacity, paint_mode,
alt, /* specify an alternative src1 */
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 gimage -- It is important to call gimp_image_update()
* instead of gimp_drawable_update() because we don't want the
* drawable and image previews to be constantly invalidated
*/
gimp_item_offsets (GIMP_ITEM (drawable), &offx, &offy);
gimp_image_update (gimage,
core->canvas_buf->x + offx,
core->canvas_buf->y + offy,
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)
{
GimpImage *gimage;
PixelRegion srcPR;
gint offx;
gint offy;
if (! gimp_drawable_has_alpha (drawable))
{
gimp_paint_core_paste (core, paint_maskPR, drawable,
paint_opacity,
image_opacity, GIMP_NORMAL_MODE,
mode);
return;
}
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
/* 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 */
srcPR.bytes = core->canvas_buf->bytes;
srcPR.x = 0;
srcPR.y = 0;
srcPR.w = core->canvas_buf->width;
srcPR.h = core->canvas_buf->height;
srcPR.rowstride = core->canvas_buf->width * core->canvas_buf->bytes;
srcPR.data = temp_buf_data (core->canvas_buf);
/* apply the paint area to the gimage */
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 gimage -- It is important to call gimp_image_update()
* instead of gimp_drawable_update() because we don't want the
* drawable and image previews to be constantly invalidated
*/
gimp_item_offsets (GIMP_ITEM (drawable), &offx, &offy);
gimp_image_update (gimage,
core->canvas_buf->x + offx,
core->canvas_buf->y + offy,
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 */
srcPR.bytes = core->canvas_buf->bytes;
srcPR.x = 0;
srcPR.y = 0;
srcPR.w = core->canvas_buf->width;
srcPR.h = core->canvas_buf->height;
srcPR.rowstride = core->canvas_buf->width * core->canvas_buf->bytes;
srcPR.data = temp_buf_data (core->canvas_buf);
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 */
srcPR.bytes = core->canvas_buf->bytes;
srcPR.x = 0;
srcPR.y = 0;
srcPR.w = core->canvas_buf->width;
srcPR.h = core->canvas_buf->height;
srcPR.rowstride = core->canvas_buf->width * core->canvas_buf->bytes;
srcPR.data = temp_buf_data (core->canvas_buf);
/* 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;
gint j;
Tile *src_tile;
Tile *dest_tile;
if (! core->undo_tiles)
{
g_warning ("set_undo_tiles: undo_tiles is null");
return;
}
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
dest_tile = tile_manager_get_tile (core->undo_tiles, j, i,
FALSE, FALSE);
if (! tile_is_valid (dest_tile))
{
src_tile = tile_manager_get_tile (gimp_drawable_data (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_canvas_tiles (GimpPaintCore *core,
gint x,
gint y,
gint w,
gint h)
{
gint i;
gint j;
Tile *tile;
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_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);
}
}
}
}
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