gimp/app/gegl/gimp-gegl-utils.c

171 lines
5.2 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimp-gegl-utils.h
* Copyright (C) 2007 Michael Natterer <mitch@gimp.org>
*
* 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 "gimp-gegl-types.h"
#include "base/tile-manager.h"
#include "gimp-gegl-utils.h"
/**
* gimp_bpp_to_babl_format:
* @bpp: bytes per pixel
* @linear: whether the pixels are linear or gamma-corrected.
*
* Return the Babl format to use for a given number of bytes per pixel.
* This function assumes that the data is 8bit.
*
* Return value: the Babl format to use
**/
const Babl *
gimp_bpp_to_babl_format (guint bpp,
gboolean linear)
{
g_return_val_if_fail (bpp > 0 && bpp <= 4, NULL);
if (linear)
{
switch (bpp)
{
case 1:
return babl_format ("Y u8");
case 2:
return babl_format ("YA u8");
case 3:
return babl_format ("RGB u8");
case 4:
return babl_format ("RGBA u8");
}
}
else
{
switch (bpp)
{
case 1:
return babl_format ("Y' u8");
case 2:
return babl_format ("Y'A u8");
case 3:
return babl_format ("R'G'B' u8");
case 4:
return babl_format ("R'G'B'A u8");
}
}
return NULL;
}
static gint
gimp_babl_format_to_legacy_bpp (const Babl *format)
{
return babl_format_get_n_components (format);
}
TileManager *
gimp_buffer_to_tiles (GeglBuffer *buffer)
{
const Babl *format = gegl_buffer_get_format (buffer);
TileManager *new_tiles = NULL;
GeglNode *source = NULL;
GeglNode *sink = NULL;
g_return_val_if_fail (buffer != NULL, NULL);
/* Setup and process the graph */
new_tiles = tile_manager_new (gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer),
gimp_babl_format_to_legacy_bpp (format));
source = gegl_node_new_child (NULL,
"operation", "gegl:buffer-source",
"buffer", buffer,
NULL);
sink = gegl_node_new_child (NULL,
"operation", "gimp:tilemanager-sink",
"tile-manager", new_tiles,
NULL);
gegl_node_link_many (source, sink, NULL);
gegl_node_process (sink);
/* Clenaup */
g_object_unref (sink);
g_object_unref (source);
return new_tiles;
}
const gchar *
gimp_layer_mode_to_gegl_operation (GimpLayerModeEffects mode)
{
switch (mode)
{
case GIMP_NORMAL_MODE: return "gegl:over";
case GIMP_DISSOLVE_MODE: return "gimp:dissolve-mode";
case GIMP_BEHIND_MODE: return "gimp:behind-mode";
case GIMP_MULTIPLY_MODE: return "gimp:multiply-mode";
case GIMP_SCREEN_MODE: return "gimp:screen-mode";
case GIMP_OVERLAY_MODE: return "gimp:overlay-mode";
case GIMP_DIFFERENCE_MODE: return "gimp:difference-mode";
case GIMP_ADDITION_MODE: return "gimp:addition-mode";
case GIMP_SUBTRACT_MODE: return "gimp:subtract-mode";
case GIMP_DARKEN_ONLY_MODE: return "gimp:darken-mode";
case GIMP_LIGHTEN_ONLY_MODE: return "gimp:lighten-mode";
case GIMP_HUE_MODE: return "gimp:hue-mode";
case GIMP_SATURATION_MODE: return "gimp:saturation-mode";
case GIMP_COLOR_MODE: return "gimp:color-mode";
case GIMP_VALUE_MODE: return "gimp:value-mode";
case GIMP_DIVIDE_MODE: return "gimp:divide-mode";
case GIMP_DODGE_MODE: return "gimp:dodge-mode";
case GIMP_BURN_MODE: return "gimp:burn-mode";
case GIMP_HARDLIGHT_MODE: return "gimp:hardlight-mode";
case GIMP_SOFTLIGHT_MODE: return "gimp:softlight-mode";
case GIMP_GRAIN_EXTRACT_MODE: return "gimp:grain-extract-mode";
case GIMP_GRAIN_MERGE_MODE: return "gimp:grain-merge-mode";
case GIMP_COLOR_ERASE_MODE: return "gimp:color-erase-mode";
case GIMP_ERASE_MODE: return "gimp:erase-mode";
case GIMP_REPLACE_MODE: return "gimp:replace-mode";
case GIMP_ANTI_ERASE_MODE: return "gimp:anti-erase-mode";
default:
break;
}
return "gegl:over";
}
const gchar *
gimp_interpolation_to_gegl_filter (GimpInterpolationType interpolation)
{
switch (interpolation)
{
case GIMP_INTERPOLATION_NONE: return "nearest";
case GIMP_INTERPOLATION_LINEAR: return "linear";
case GIMP_INTERPOLATION_CUBIC: return "cubic";
case GIMP_INTERPOLATION_LANCZOS: return "lanczos";
default:
break;
}
return "nearest";
}