BUG: Unsigned char SetAlpha must be on scale of 0-255

hjmjohnson · dzenanz · commit df657538789e · 2019-06-10T11:57:43.000-04:00
diff --git a/src/Core/Common/Transparency/Code.cxx b/src/Core/Common/Transparency/Code.cxx
@@ -71,7 +71,7 @@ int main(int argc, char *argv[])
             pixel.SetRed(255);
             pixel.SetGreen(0);
             pixel.SetBlue(0);
-            pixel.SetAlpha(0.5);
+            pixel.SetAlpha( static_cast<unsigned char>( 0.5 * 255 ) );
         }
         imageIterator.Set(pixel);
 

Original file line number	Diff line number	Diff line change
`@@ -71,7 +71,7 @@ int main(int argc, char *argv[])`
`71`	`71`	`pixel.SetRed(255);`
`72`	`72`	`pixel.SetGreen(0);`
`73`	`73`	`pixel.SetBlue(0);`
`74`		`- pixel.SetAlpha(0.5);`
	`74`	`+ pixel.SetAlpha( static_cast<unsigned char>( 0.5 * 255 ) );`
`75`	`75`	`}`
`76`	`76`	`imageIterator.Set(pixel);`
`77`	`77`