Author: Carlos Lopez <genet...@gmail.com>
Date: Fri Apr 19 20:53:11 2013 +0200
Fix bug #384: Blur layer is broken in tile mode and Cairo.
the horizontal and vertical box blurs, used in Fast Gaussian, Box, and Cross
blurs, didn't take in consideration to convert the value types to accumulator
types when doing the operations for blur.
---
ETL/ETL/_boxblur.h | 28 ++++++++++++++++++----------
1 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/ETL/ETL/_boxblur.h b/ETL/ETL/_boxblur.h
index c043dc3..7a713b4 100644
--- a/ETL/ETL/_boxblur.h
+++ b/ETL/ETL/_boxblur.h
@@ -51,17 +51,21 @@ hbox_blur(T1 pen,int w, int h, int length, T2 outpen)
iter=pen.x();
end=pen.end_x();
- typename T1::accumulator_type tot(*iter*(length+1));
+ typename T1::accumulator_type tot((typename
T1::accumulator_type)(*iter)*(length+1));
for (x=0;x<length && iter!=end;x++,++iter) tot+=*iter;
iter=pen.x();
for (x=0;x<w && iter!=end;x++,++iter,outpen.inc_x())
{
- tot -= (x>length) ? iter[-length-1] : *pen.x();
- tot += ((x+length)<w) ? iter[length] : end[-1];
-
- outpen.put_value(tot*divisor);
+ tot -= (x>length) ?
+ (typename
T1::accumulator_type)(iter[-length-1]) :
+ (typename T1::accumulator_type)(*pen.x());
+ tot += ((x+length)<w) ?
+ (typename T1::accumulator_type)(iter[length]) :
+ (typename T1::accumulator_type)(end[-1]);
+
+ outpen.put_value((typename
T2::value_type)(tot*divisor));
}
outpen.dec_x(x);
}
@@ -82,17 +86,21 @@ vbox_blur(T1 pen,const int w, const int h, int length, T2
outpen)
iter=pen.y();
end=pen.end_y();
- typename T1::accumulator_type tot(*iter*(length+1));
+ typename T1::accumulator_type tot((typename
T1::accumulator_type)(*iter)*(length+1));
for (y=0;y<length && iter!=end;y++,++iter) tot+=*iter;
iter=pen.y();
for (y=0;y<h && iter!=end;y++,++iter,outpen.inc_y())
{
- tot -= (y>length) ? iter[-length-1] : *pen.y();
- tot += ((y+length)<h) ? iter[length] : end[-1];
-
- outpen.put_value(tot*divisor);
+ tot -= (y>length) ?
+ (typename T1::accumulator_type)(iter[-length-1]) :
+ (typename T1::accumulator_type)(*pen.y());
+ tot += ((y+length)<h) ?
+ (typename T1::accumulator_type)(iter[length]) :
+ (typename T1::accumulator_type)(end[-1]);
+
+ outpen.put_value((typename
T2::value_type)(tot*divisor));
}
outpen.dec_y(y);
}
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