Re: Braille format support

Samuel Thibault <[email protected]> Wed, 26 Mar 2008 00:08:19 +0000

Newsgroups	gmane.comp.video.image-magick.devel
Message-ID	<20080326000819.GF4695@implementation>

Hello,

Playing a bit with the braille format coder, I realized that one of its
most common use will be to output black on white drawings.  I hence
think we should probably invert the polarity, so that the user doesn't
need to use the -negate option most of the time.

Samuel

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patch (text/plain, 689 B)

Index: coders/braille.c
===================================================================
--- coders/braille.c	(r�vision 10411)
+++ coders/braille.c	(copie de travail)
@@ -243,10 +243,10 @@
 
   (void) SetImageType(image,BilevelType);
   polarity=(IndexPacket)
-    (PixelIntensityToQuantum(&image->colormap[0]) < (QuantumRange/2));
+    (PixelIntensityToQuantum(&image->colormap[0]) >= (QuantumRange/2));
   if (image->colors == 2)
     polarity=(IndexPacket)
-      (PixelIntensityToQuantum(&image->colormap[0]) <
+      (PixelIntensityToQuantum(&image->colormap[0]) >=
        PixelIntensityToQuantum(&image->colormap[1]));
   for (y=0; y < (long) image->rows; y+=cell_height)
   {