killem

[rrdtool.git] / libraries / libart_lgpl-2.3.7 / art_alphagamma.c

diff --git a/libraries/libart_lgpl-2.3.7/art_alphagamma.c b/libraries/libart_lgpl-2.3.7/art_alphagamma.c
deleted file mode 100644 (file)
index e3c1098..0000000
--- a/libraries/libart_lgpl-2.3.7/art_alphagamma.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/* Libart_LGPL - library of basic graphic primitives
- * Copyright (C) 1998 Raph Levien
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/* Some functions to build alphagamma tables */
-
-#include <math.h>
-#include "art_misc.h"
-
-#include "art_alphagamma.h"
-
-/**
- * art_alphagamma_new: Create a new #ArtAlphaGamma.
- * @gamma: Gamma value.
- *
- * Create a new #ArtAlphaGamma for a specific value of @gamma. When
- * correctly implemented (which is generally not the case in libart),
- * alpha compositing with an alphagamma parameter is equivalent to
- * applying the gamma transformation to source images, doing the alpha
- * compositing (in linear intensity space), then applying the inverse
- * gamma transformation, bringing it back to a gamma-adjusted
- * intensity space.
- *
- * Return value: The newly created #ArtAlphaGamma.
- **/
-ArtAlphaGamma *
-art_alphagamma_new (double gamma)
-{
-  int tablesize;
-  ArtAlphaGamma *alphagamma;
-  int i;
-  int *table;
-  art_u8 *invtable;
-  double s, r_gamma;
-
-  tablesize = ceil (gamma * 8);
-  if (tablesize < 10)
-    tablesize = 10;
-
-  alphagamma = (ArtAlphaGamma *)art_alloc (sizeof(ArtAlphaGamma) +
-                                          ((1 << tablesize) - 1) *
-                                          sizeof(art_u8));
-  alphagamma->gamma = gamma;
-  alphagamma->invtable_size = tablesize;
-
-  table = alphagamma->table;
-  for (i = 0; i < 256; i++)
-    table[i] = (int)floor (((1 << tablesize) - 1) *
-                          pow (i * (1.0 / 255), gamma) + 0.5);
-
-  invtable = alphagamma->invtable;
-  s = 1.0 / ((1 << tablesize) - 1);
-  r_gamma = 1.0 / gamma;
-  for (i = 0; i < 1 << tablesize; i++)
-    invtable[i] = (int)floor (255 * pow (i * s, r_gamma) + 0.5);
-
-  return alphagamma;
-}
-
-/**
- * art_alphagamma_free: Free an #ArtAlphaGamma.
- * @alphagamma: An #ArtAlphaGamma.
- *
- * Frees the #ArtAlphaGamma.
- **/
-void
-art_alphagamma_free (ArtAlphaGamma *alphagamma)
-{
-  art_free (alphagamma);
-}