gimp/app/core/gimplayer-project.c

154 lines
4.7 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimplayer-project.h
*
* 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 <gegl.h>
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpimage.h"
#include "gimplayer.h"
#include "gimplayer-project.h"
#include "gimplayermask.h"
void
gimp_layer_project_region (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height,
PixelRegion *projPR,
gboolean combine)
{
GimpLayer *layer = GIMP_LAYER (drawable);
GimpLayerMask *mask = gimp_layer_get_mask (layer);
if (mask && gimp_layer_mask_get_show (mask))
{
/* If we're showing the layer mask instead of the layer... */
PixelRegion srcPR;
TileManager *temp_tiles;
gimp_drawable_init_src_region (GIMP_DRAWABLE (mask), &srcPR,
x, y, width, height,
&temp_tiles);
copy_gray_to_region (&srcPR, projPR);
if (temp_tiles)
tile_manager_unref (temp_tiles);
}
else
{
/* Otherwise, normal */
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
PixelRegion srcPR;
PixelRegion maskPR;
PixelRegion *mask_pr = NULL;
const guchar *colormap = NULL;
TileManager *temp_mask_tiles = NULL;
TileManager *temp_layer_tiles = NULL;
InitialMode initial_mode;
CombinationMode combination_mode;
gboolean visible[MAX_CHANNELS];
gimp_drawable_init_src_region (drawable, &srcPR,
x, y, width, height,
&temp_layer_tiles);
if (mask && gimp_layer_mask_get_apply (mask))
{
gimp_drawable_init_src_region (GIMP_DRAWABLE (mask), &maskPR,
x, y, width, height,
&temp_mask_tiles);
mask_pr = &maskPR;
}
/* Based on the type of the layer, project the layer onto the
* projection image...
*/
switch (gimp_drawable_type (drawable))
{
case GIMP_RGB_IMAGE:
case GIMP_GRAY_IMAGE:
initial_mode = INITIAL_INTENSITY;
combination_mode = COMBINE_INTEN_A_INTEN;
break;
case GIMP_RGBA_IMAGE:
case GIMP_GRAYA_IMAGE:
initial_mode = INITIAL_INTENSITY_ALPHA;
combination_mode = COMBINE_INTEN_A_INTEN_A;
break;
case GIMP_INDEXED_IMAGE:
colormap = gimp_drawable_get_colormap (drawable),
initial_mode = INITIAL_INDEXED;
combination_mode = COMBINE_INTEN_A_INDEXED;
break;
case GIMP_INDEXEDA_IMAGE:
colormap = gimp_drawable_get_colormap (drawable),
initial_mode = INITIAL_INDEXED_ALPHA;
combination_mode = COMBINE_INTEN_A_INDEXED_A;
break;
default:
g_assert_not_reached ();
break;
}
gimp_image_get_visible_array (image, visible);
if (combine)
{
combine_regions (projPR, &srcPR, projPR, mask_pr,
colormap,
gimp_layer_get_opacity (layer) * 255.999,
gimp_layer_get_mode (layer),
visible,
combination_mode);
}
else
{
initial_region (&srcPR, projPR, mask_pr,
colormap,
gimp_layer_get_opacity (layer) * 255.999,
gimp_layer_get_mode (layer),
visible,
initial_mode);
}
if (temp_layer_tiles)
tile_manager_unref (temp_layer_tiles);
if (temp_mask_tiles)
tile_manager_unref (temp_mask_tiles);
}
}