From: cristy <urban-warrior@git.imagemagick.org>
Date: Sun, 29 Jul 2012 13:58:11 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~5230
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e6510f626199c1d08b91acb0aa0a2e729bb65f34;p=imagemagick

---

diff --git a/MagickWand/magick-image.c b/MagickWand/magick-image.c
index dc83a4a40..c01f4e2e7 100644
--- a/MagickWand/magick-image.c
+++ b/MagickWand/magick-image.c
@@ -7341,6 +7341,46 @@ WandExport MagickWand *MagickOptimizeImageLayers(MagickWand *wand)
 %                                                                             %
 %                                                                             %
 %                                                                             %
+%   M a g i c k O p t i m i z e I m a g e T r a n s p a r e n c y             %
+%                                                                             %
+%                                                                             %
+%                                                                             %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%  MagickOptimizeImageTransparency() takes a frame optimized GIF animation, and
+%  compares the overlayed pixels against the disposal image resulting from all
+%  the previous frames in the animation.  Any pixel that does not change the
+%  disposal image (and thus does not effect the outcome of an overlay) is made
+%  transparent.
+%
+%  WARNING: This modifies the current images directly, rather than generate
+%  a new image sequence.
+%  The format of the MagickOptimizeImageTransparency method is:
+%
+%      MagickBooleanType MagickOptimizeImageTransparency(MagickWand *wand)
+%
+%  A description of each parameter follows:
+%
+%    o wand: the magick wand.
+%
+*/
+WandExport MagickBooleanType MagickOptimizeImageTransparency(MagickWand *wand)
+{
+  assert(wand != (MagickWand *) NULL);
+  assert(wand->signature == WandSignature);
+  if( IfMagickTrue(wand->debug) )
+    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",wand->name);
+  if (wand->images == (Image *) NULL)
+    return(MagickFalse);
+  OptimizeImageTransparency(wand->images,wand->exception);
+  return(MagickTrue);
+}
+
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%                                                                             %
+%                                                                             %
+%                                                                             %
 %     M a g i c k O r d e r e d P o s t e r i z e I m a g e                   %
 %                                                                             %
 %                                                                             %
diff --git a/MagickWand/magick-image.h b/MagickWand/magick-image.h
index 9d01f24dc..771c28b5e 100644
--- a/MagickWand/magick-image.h
+++ b/MagickWand/magick-image.h
@@ -196,6 +196,7 @@ extern WandExport MagickBooleanType
   MagickOilPaintImage(MagickWand *,const double,const double),
   MagickOpaquePaintImage(MagickWand *,const PixelWand *,const PixelWand *,
     const double,const MagickBooleanType),
+  MagickOptimizeImageTransparency(MagickWand *),
   MagickOrderedPosterizeImage(MagickWand *,const char *),
   MagickTransparentPaintImage(MagickWand *,const PixelWand *,
     const double,const double,const MagickBooleanType invert),