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gimp/app/core/gimpdrawable-combine.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 <glib-object.h>
#include "core-types.h"
#include "base/pixel-region.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpchannel.h"
#include "gimpdrawable-combine.h"
#include "gimpimage.h"
void
gimp_drawable_real_apply_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
GimpLayerModeEffects mode,
TileManager *src1_tiles,
gint x,
gint y)
{
GimpImage *gimage;
GimpItem *item;
GimpChannel *mask;
gint x1, y1, x2, y2;
gint offset_x, offset_y;
PixelRegion src1PR, destPR, maskPR;
CombinationMode operation;
gboolean active_components[MAX_CHANNELS];
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
mask = gimp_image_get_mask (gimage);
/* don't apply the mask to itself and don't apply an empty mask */
if (GIMP_DRAWABLE (mask) == drawable || gimp_channel_is_empty (mask))
mask = NULL;
/* configure the active channel array */
gimp_drawable_get_active_components (drawable, active_components);
/* determine what sort of operation is being attempted and
* if it's actually legal...
*/
operation = gimp_image_get_combination_mode (gimp_drawable_type (drawable),
src2PR->bytes);
if (operation == -1)
{
g_warning ("%s: illegal parameters.", G_STRFUNC);
return;
}
/* get the layer offsets */
gimp_item_offsets (item, &offset_x, &offset_y);
/* make sure the image application coordinates are within gimage bounds */
x1 = CLAMP (x, 0, gimp_item_width (item));
y1 = CLAMP (y, 0, gimp_item_height (item));
x2 = CLAMP (x + src2PR->w, 0, gimp_item_width (item));
y2 = CLAMP (y + src2PR->h, 0, gimp_item_height (item));
if (mask)
{
/* make sure coordinates are in mask bounds ...
* we need to add the layer offset to transform coords
* into the mask coordinate system
*/
x1 = CLAMP (x1, -offset_x, gimp_item_width (GIMP_ITEM (mask))-offset_x);
y1 = CLAMP (y1, -offset_y, gimp_item_height (GIMP_ITEM (mask))-offset_y);
x2 = CLAMP (x2, -offset_x, gimp_item_width (GIMP_ITEM (mask))-offset_x);
y2 = CLAMP (y2, -offset_y, gimp_item_height (GIMP_ITEM (mask))-offset_y);
}
/* If the calling procedure specified an undo step... */
if (push_undo)
gimp_drawable_push_undo (drawable, undo_desc, x1, y1, x2, y2, NULL, FALSE);
/* configure the pixel regions
* If an alternative to using the drawable's data as src1 was provided...
*/
if (src1_tiles)
pixel_region_init (&src1PR, src1_tiles,
x1, y1, (x2 - x1), (y2 - y1), FALSE);
else
pixel_region_init (&src1PR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
pixel_region_resize (src2PR,
src2PR->x + (x1 - x), src2PR->y + (y1 - y),
(x2 - x1), (y2 - y1));
if (mask)
{
gint mx, my;
/* configure the mask pixel region
* don't use x1 and y1 because they are in layer
* coordinate system. Need mask coordinate system
*/
mx = x1 + offset_x;
my = y1 + offset_y;
pixel_region_init (&maskPR,
gimp_drawable_data (GIMP_DRAWABLE (mask)),
mx, my,
(x2 - x1), (y2 - y1),
FALSE);
combine_regions (&src1PR, src2PR, &destPR, &maskPR, NULL,
opacity * 255.999,
mode,
active_components,
operation);
}
else
{
combine_regions (&src1PR, src2PR, &destPR, NULL, NULL,
opacity * 255.999,
mode,
active_components,
operation);
}
}
/* Similar to gimp_drawable_apply_region but works in "replace" mode (i.e.
* transparent pixels in src2 make the result transparent rather than
* opaque.
*
* Takes an additional mask pixel region as well.
*/
void
gimp_drawable_real_replace_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
PixelRegion *maskPR,
gint x,
gint y)
{
GimpImage *gimage;
GimpItem *item;
GimpChannel *mask;
gint x1, y1, x2, y2;
gint offset_x, offset_y;
PixelRegion src1PR, destPR;
CombinationMode operation;
gboolean active_components[MAX_CHANNELS];
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
mask = gimp_image_get_mask (gimage);
/* don't apply the mask to itself and don't apply an empty mask */
if (GIMP_DRAWABLE (mask) == drawable || gimp_channel_is_empty (mask))
mask = NULL;
/* configure the active channel array */
gimp_drawable_get_active_components (drawable, active_components);
/* determine what sort of operation is being attempted and
* if it's actually legal...
*/
operation = gimp_image_get_combination_mode (gimp_drawable_type (drawable),
src2PR->bytes);
if (operation == -1)
{
g_warning ("%s: illegal parameters.", G_STRFUNC);
return;
}
/* get the layer offsets */
gimp_item_offsets (item, &offset_x, &offset_y);
/* make sure the image application coordinates are within gimage bounds */
x1 = CLAMP (x, 0, gimp_item_width (item));
y1 = CLAMP (y, 0, gimp_item_height (item));
x2 = CLAMP (x + src2PR->w, 0, gimp_item_width (item));
y2 = CLAMP (y + src2PR->h, 0, gimp_item_height (item));
if (mask)
{
/* make sure coordinates are in mask bounds ...
* we need to add the layer offset to transform coords
* into the mask coordinate system
*/
x1 = CLAMP (x1, -offset_x, gimp_item_width (GIMP_ITEM (mask))-offset_x);
y1 = CLAMP (y1, -offset_y, gimp_item_height(GIMP_ITEM (mask))-offset_y);
x2 = CLAMP (x2, -offset_x, gimp_item_width (GIMP_ITEM (mask))-offset_x);
y2 = CLAMP (y2, -offset_y, gimp_item_height(GIMP_ITEM (mask))-offset_y);
}
/* If the calling procedure specified an undo step... */
if (push_undo)
gimp_drawable_push_undo (drawable, undo_desc, x1, y1, x2, y2, NULL, FALSE);
/* configure the pixel regions
* If an alternative to using the drawable's data as src1 was provided...
*/
pixel_region_init (&src1PR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
pixel_region_resize (src2PR,
src2PR->x + (x1 - x), src2PR->y + (y1 - y),
(x2 - x1), (y2 - y1));
if (mask)
{
PixelRegion mask2PR, tempPR;
guchar *temp_data;
gint mx, my;
/* configure the mask pixel region
* don't use x1 and y1 because they are in layer
* coordinate system. Need mask coordinate system
*/
mx = x1 + offset_x;
my = y1 + offset_y;
pixel_region_init (&mask2PR,
gimp_drawable_data (GIMP_DRAWABLE (mask)),
mx, my,
(x2 - x1), (y2 - y1),
FALSE);
tempPR.bytes = 1;
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.rowstride = tempPR.w * tempPR.bytes;
tempPR.data = temp_data = g_malloc (tempPR.h * tempPR.rowstride);
copy_region (&mask2PR, &tempPR);
/* apparently, region operations can mutate some PR data. */
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.data = temp_data;
apply_mask_to_region (&tempPR, maskPR, OPAQUE_OPACITY);
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.data = temp_data;
combine_regions_replace (&src1PR, src2PR, &destPR, &tempPR, NULL,
opacity * 255.999,
active_components,
operation);
g_free (temp_data);
}
else
{
combine_regions_replace (&src1PR, src2PR, &destPR, maskPR, NULL,
opacity * 255.999,
active_components,
operation);
}
}
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