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libgimp: in GimpTileBackendPlugin, don't read tile data upon TILE_SET

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Add an internal _gimp_tile_ref_noinit() function, which increases
the ref-count of a tile *without* initializing its data (in
particular, without reading its data from GIMP, or zeroing it.)
Use this function, instead of gimp_tile_ref(), when storing a tile
in GimpTileBackendPlugin, to avoid unnecessarily reading the tile
data from GIMP.
This commit is contained in:
Ell
2019-01-15 02:28:42 -05:00
parent 41d5986a2b
commit 5ffdb9aa41
3 changed files with 16 additions and 1 deletions
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13
libgimp/gimptile.c
View File

@ -86,6 +86,19 @@ gimp_tile_ref (GimpTile *tile)
gimp_tile_cache_insert (tile);
}
void
_gimp_tile_ref_noinit (GimpTile *tile)
{
g_return_if_fail (tile != NULL);
tile->ref_count++;
if (tile->ref_count == 1)
tile->data = g_new (guchar, tile->ewidth * tile->eheight * tile->bpp);
gimp_tile_cache_insert (tile);
}
void
gimp_tile_unref (GimpTile *tile,
gboolean dirty)

2
libgimp/gimptile.h
View File

@ -58,6 +58,8 @@ void gimp_tile_cache_ntiles (gulong ntiles);
/* private function */
G_GNUC_INTERNAL void _gimp_tile_ref_noinit (GimpTile *tile);
G_GNUC_INTERNAL void _gimp_tile_cache_flush_drawable (GimpDrawable *drawable);

2
libgimp/gimptilebackendplugin.c
View File

@ -261,7 +261,7 @@ gimp_tile_write_mul (GimpTileBackendPlugin *backend_plugin,
gimp_tile = gimp_drawable_get_tile (priv->drawable,
priv->shadow,
y+v, x+u);
gimp_tile_ref (gimp_tile);
_gimp_tile_ref_noinit (gimp_tile);
{
gint ewidth = gimp_tile->ewidth;