[Scummvm-cvs-logs] CVS: scummvm/common scaler.cpp,1.31,1.32

[Max Horn]

Update of /cvsroot/scummvm/scummvm/common
In directory sc8-pr-cvs1:/tmp/cvs-serv2673

Modified Files:
	scaler.cpp 
Log Message:
fix the inaccurate version of interpolate5Line to work correctly for odd widths

Index: scaler.cpp
===================================================================
RCS file: /cvsroot/scummvm/scummvm/common/scaler.cpp,v
retrieving revision 1.31
retrieving revision 1.32
diff -u -d -r1.31 -r1.32
--- scaler.cpp	22 Jun 2003 17:29:55 -0000	1.31
+++ scaler.cpp	22 Jun 2003 17:32:50 -0000	1.32
@@ -666,6 +666,19 @@
 	}
 #else
 	// Not fully accurate, but a bit faster
+	
+	if (width & 1) {
+		// For efficency reasons we normally blit two pixels at a time; but if the 
+		// width is odd, we first blit a single pixel.
+		width--;
+		if (scale == 1) {
+			uint32 B = *srcB++;
+			*dst++ = (uint16)Q_INTERPOLATE(*srcA++, B, B, B);
+		} else {
+			*dst++ = (uint16)INTERPOLATE(*srcA++, *srcB++);
+		}
+	}
+
 	width /= 2;
 	const uint32 *sA = (const uint32 *)srcA;
 	const uint32 *sB = (const uint32 *)srcB;