Merge fix for issue 134 into trunk.

2010-08-26 16:46:03 +00:00
parent 83e249a1a0
commit 47e8f23e9f
3 changed files with 7 additions and 4 deletions
--- a/src/nvtt/tools/compress.cpp
+++ b/src/nvtt/tools/compress.cpp
@ -482,8 +482,11 @@ int main(int argc, char *argv[])
        // Dither alpha when using BC2.
        compressionOptions.setQuantization(false, true, false);
    }
-
-    if (format == nvtt::Format_RGBA)
+    else if (format == nvtt::Format_BC1a) {
+        // Binary alpha when using BC1a.
+        compressionOptions.setQuantization(false, true, true, 127);
+    }
+    else if (format == nvtt::Format_RGBA)
    {
        if (luminance)
        {