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Fix reduce_4() to make it consistent with reduce_8(). This was breaking tiles which were compressing down to a 16 entry colormap. All the pixels were being set to the alpha index.

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This commit is contained in:
Jon Burgess 2009-06-13 18:27:44 +00:00
parent e8d8530f9a
commit 8c60753db6
1 changed files with 1 additions and 1 deletions
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include/mapnik/png_io.hpp
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@ -126,7 +126,7 @@ namespace mapnik {
mapnik::rgb c((val)&0xff, (val>>8)&0xff, (val>>16) & 0xff); mapnik::rgb c((val)&0xff, (val>>8)&0xff, (val>>16) & 0xff);
byte index = tree.quantize(c); byte index = tree.quantize(c);
if (x%2 > 0) index = index<<4; if (x%2 > 0) index = index<<4;
if ((val>>24)^0x80) index = 0;//alfa if (!((val>>24)&0x80)) index = 0;//alfa
row_out[x>>1] |= index; row_out[x>>1] |= index;
} }
} }